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Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (47 commits)
  [MAINTAINERS] The ham radio code now has website at http://www.linux-ax25.org.
  [MIPS] Use __ffs() instead of ffs() for waybit calculation.
  [MIPS] Fix Makefile bugs for MIPS32/MIPS64 R1 and R2.
  [MIPS] Handle IDE PIO cache aliases on SMP.
  [MIPS] Make mips_srs_init static.
  [MIPS] MIPS boards: Set HZ to 100.
  [MIPS] kgdb: Let gcc compute the array size itself.
  [MIPS] FPU affinity for MT ASE.
  [MIPS] MT: Improved multithreading support.
  [MIPS] kpsd and other AP/SP improvements.
  [MIPS] R2: Instruction hazard barrier.
  [MIPS] Fix genrtc compilation.
  [MIPS] R2: Implement shadow register allocation without spinlock.
  [MIPS] Fix VR41xx build errors.
  [MIPS] Fix tx49_blast_icache32_page_indexed.
  [MIPS] Enable SCHED_NO_NO_OMIT_FRAME_POINTER for MIPS.
  [MIPS] Use "R" constraint for cache_op.
  [MIPS] Rewrite all the assembler interrupt handlers to C.
  [MIPS] Fix the crime against humanity that mipsIRQ.S is.
  [MIPS] Fixup damage done by 22a9835c35.
  ...
This commit is contained in:
Linus Torvalds 2006-04-18 19:49:42 -07:00
commit 038e5e2bf2
197 changed files with 7751 additions and 3995 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
MAINTAINERS
View File

@ -411,6 +411,7 @@ AX.25 NETWORK LAYER
P: Ralf Baechle
M: ralf@linux-mips.org
L: linux-hams@vger.kernel.org
W: http://www.linux-ax25.org/
S: Maintained
BAYCOM/HDLCDRV DRIVERS FOR AX.25
@ -1869,6 +1870,7 @@ NETROM NETWORK LAYER
P: Ralf Baechle
M: ralf@linux-mips.org
L: linux-hams@vger.kernel.org
W: http://www.linux-ax25.org/
S: Maintained
NETWORK BLOCK DEVICE
@ -2260,6 +2262,7 @@ ROSE NETWORK LAYER
P: Ralf Baechle
M: ralf@linux-mips.org
L: linux-hams@vger.kernel.org
W: http://www.linux-ax25.org/
S: Maintained
RISCOM8 DRIVER

25
arch/mips/Kconfig
View File

@ -816,6 +816,10 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
config SCHED_NO_NO_OMIT_FRAME_POINTER
bool
default y
#
# Select some configuration options automatically based on user selections.
#
@ -1443,6 +1447,10 @@ choice
prompt "MIPS MT options"
depends on MIPS_MT
config MIPS_MT_SMTC
bool "SMTC: Use all TCs on all VPEs for SMP"
select SMP
config MIPS_MT_SMP
bool "Use 1 TC on each available VPE for SMP"
select SMP
@ -1456,6 +1464,11 @@ config MIPS_VPE_LOADER
endchoice
config MIPS_MT_FPAFF
bool "Dynamic FPU affinity for FP-intensive threads"
depends on MIPS_MT
default y
config MIPS_VPE_LOADER_TOM
bool "Load VPE program into memory hidden from linux"
depends on MIPS_VPE_LOADER
@ -1472,6 +1485,16 @@ config MIPS_VPE_APSP_API
depends on MIPS_VPE_LOADER
help
config MIPS_APSP_KSPD
bool "Enable KSPD"
depends on MIPS_VPE_APSP_API
default y
help
KSPD is a kernel daemon that accepts syscall requests from the SP
side, actions them and returns the results. It also handles the
"exit" syscall notifying other kernel modules the SP program is
exiting. You probably want to say yes here.
config SB1_PASS_1_WORKAROUNDS
bool
depends on CPU_SB1_PASS_1
@ -1599,7 +1622,7 @@ source "mm/Kconfig"
config SMP
bool "Multi-Processing support"
depends on CPU_RM9000 || ((SIBYTE_BCM1x80 || SIBYTE_BCM1x55 || SIBYTE_SB1250 || QEMU) && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP
depends on CPU_RM9000 || ((SIBYTE_BCM1x80 || SIBYTE_BCM1x55 || SIBYTE_SB1250 || QEMU) && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP || MIPS_MT_SMTC
---help---
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If

12
arch/mips/Makefile
View File

@ -105,18 +105,18 @@ cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips2 -mtune=r4600) \
cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
-Wa,-mips32 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips2 -mtune=r4600) \
cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
-Wa,-mips32r2 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips2 -mtune=r4600) \
cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
-Wa,-mips64 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips2 -mtune=r4600 ) \
cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
-Wa,-mips64r2 -Wa,--trap
cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
cflags-$(CONFIG_CPU_R5432) += $(call cc-options,-march=r5400,-march=r5000) \
cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_NEVADA) += $(call cc-options,-march=rm5200,-march=r5000) \
cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
-Wa,--trap

2
arch/mips/au1000/common/Makefile
View File

@ -6,7 +6,7 @@
# Makefile for the Alchemy Au1000 CPU, generic files.
#
obj-y += prom.o int-handler.o irq.o puts.o time.o reset.o \
obj-y += prom.o irq.o puts.o time.o reset.o \
au1xxx_irqmap.o clocks.o platform.o power.o setup.o \
sleeper.o cputable.o dma.o dbdma.o gpio.o

68
arch/mips/au1000/common/int-handler.S
View File

@ -1,68 +0,0 @@
/*
* Copyright 2001 MontaVista Software Inc.
* Author: ppopov@mvista.com
*
* Interrupt dispatcher for Au1000 boards.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
.text
.set macro
.set noat
.align 5
NESTED(au1000_IRQ, PT_SIZE, sp)
SAVE_ALL
CLI # Important: mark KERNEL mode !
mfc0 t0,CP0_CAUSE # get pending interrupts
mfc0 t1,CP0_STATUS # get enabled interrupts
and t0,t1 # isolate allowed ones
andi t0,0xff00 # isolate pending bits
beqz t0, 3f # spurious interrupt
andi a0, t0, CAUSEF_IP7
beq a0, zero, 1f
move a0, sp
jal mips_timer_interrupt
j ret_from_irq
1:
andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0
beq a0, zero, 2f
move a0,sp
jal intc0_req0_irqdispatch
j ret_from_irq
2:
andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1
beq a0, zero, 3f
move a0,sp
jal intc0_req1_irqdispatch
j ret_from_irq
3:
andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0
beq a0, zero, 4f
move a0,sp
jal intc1_req0_irqdispatch
j ret_from_irq
4:
andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1
beq a0, zero, 5f
move a0, sp
jal intc1_req1_irqdispatch
j ret_from_irq
5:
move a0, sp
j spurious_interrupt
END(au1000_IRQ)

20
arch/mips/au1000/common/irq.c
View File

@ -66,7 +66,6 @@
#define EXT_INTC1_REQ1 5 /* IP 5 */
#define MIPS_TIMER_IP 7 /* IP 7 */
extern asmlinkage void au1000_IRQ(void);
extern void set_debug_traps(void);
extern irq_cpustat_t irq_stat [NR_CPUS];
@ -446,7 +445,6 @@ void __init arch_init_irq(void)
extern int au1xxx_ic0_nr_irqs;
cp0_status = read_c0_status();
set_except_vector(0, au1000_IRQ);
/* Initialize interrupt controllers to a safe state.
*/
@ -661,3 +659,21 @@ restore_au1xxx_intctl(void)
au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
}
#endif /* CONFIG_PM */
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & CAUSEF_IP7)
mips_timer_interrupt(regs);
else if (pending & CAUSEF_IP2)
intc0_req0_irqdispatch(regs);
else if (pending & CAUSEF_IP3)
intc0_req1_irqdispatch(regs);
else if (pending & CAUSEF_IP4)
intc1_req0_irqdispatch(regs);
else if (pending & CAUSEF_IP5)
intc1_req1_irqdispatch(regs);
else
spurious_interrupt(regs);
}

2
arch/mips/cobalt/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for the Cobalt micro systems family specific parts of the kernel
#
obj-y := irq.o int-handler.o reset.o setup.o
obj-y := irq.o reset.o setup.o
obj-$(CONFIG_EARLY_PRINTK) += console.o

25
arch/mips/cobalt/int-handler.S
View File

@ -1,25 +0,0 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle
* Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/mach-cobalt/cobalt.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
.text
.align 5
NESTED(cobalt_handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
PTR_LA ra, ret_from_irq
move a0, sp
j cobalt_irq
END(cobalt_handle_int)

6
arch/mips/cobalt/irq.c
View File

@ -20,8 +20,6 @@
#include <asm/mach-cobalt/cobalt.h>
extern void cobalt_handle_int(void);
/*
* We have two types of interrupts that we handle, ones that come in through
* the CPU interrupt lines, and ones that come in on the via chip. The CPU
@ -79,7 +77,7 @@ static inline void via_pic_irq(struct pt_regs *regs)
do_IRQ(irq, regs);
}
asmlinkage void cobalt_irq(struct pt_regs *regs)
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned pending;
@ -122,8 +120,6 @@ void __init arch_init_irq(void)
*/
GALILEO_OUTL(0, GT_INTRMASK_OFS);
set_except_vector(0, cobalt_handle_int);
init_i8259_irqs(); /* 0 ... 15 */
mips_cpu_irq_init(COBALT_CPU_IRQ); /* 16 ... 23 */

1096
arch/mips/configs/tb0287_defconfig Normal file
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File diff suppressed because it is too large Load Diff

2
arch/mips/ddb5xxx/ddb5074/Makefile
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@ -3,6 +3,6 @@
# under Linux.
#
obj-y += setup.o irq.o int-handler.o nile4_pic.o
obj-y += setup.o irq.o nile4_pic.o
EXTRA_AFLAGS := $(CFLAGS)

120
arch/mips/ddb5xxx/ddb5074/int-handler.S
View File

@ -1,120 +0,0 @@
/*
* arch/mips/ddb5074/int-handler.S -- NEC DDB Vrc-5074 interrupt handler
*
* Based on arch/mips/sgi/kernel/indyIRQ.S
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
*
* Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
* Sony Software Development Center Europe (SDCE), Brussels
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
/* A lot of complication here is taken away because:
*
* 1) We handle one interrupt and return, sitting in a loop and moving across
* all the pending IRQ bits in the cause register is _NOT_ the answer, the
* common case is one pending IRQ so optimize in that direction.
*
* 2) We need not check against bits in the status register IRQ mask, that
* would make this routine slow as hell.
*
* 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in
* between like BSD spl() brain-damage.
*
* Furthermore, the IRQs on the INDY look basically (barring software IRQs
* which we don't use at all) like:
*
* MIPS IRQ Source
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 Local IRQ level zero
* 3 Local IRQ level one
* 4 8254 Timer zero
* 5 8254 Timer one
* 6 Bus Error
* 7 R4k timer (what we use)
*
* We handle the IRQ according to _our_ priority which is:
*
* Highest ---- R4k Timer
* Local IRQ zero
* Local IRQ one
* Bus Error
* 8254 Timer zero
* Lowest ---- 8254 Timer one
*
* then we just return, if multiple IRQs are pending then we will just take
* another exception, big deal.
*/
.text
.set noreorder
.set noat
.align 5
NESTED(ddbIRQ, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
mfc0 s0, CP0_CAUSE # get irq mask
#if 1
mfc0 t2,CP0_STATUS # get enabled interrupts
and s0,t2 # isolate allowed ones
#endif
/* First we check for r4k counter/timer IRQ. */
andi a0, s0, CAUSEF_IP2 # delay slot, check local level zero
beq a0, zero, 1f
andi a0, s0, CAUSEF_IP3 # delay slot, check local level one
/* Wheee, local level zero interrupt. */
jal ddb_local0_irqdispatch
move a0, sp # delay slot
j ret_from_irq
nop # delay slot
1:
beq a0, zero, 1f
andi a0, s0, CAUSEF_IP6 # delay slot, check bus error
/* Wheee, local level one interrupt. */
move a0, sp
jal ddb_local1_irqdispatch
nop
j ret_from_irq
nop
1:
beq a0, zero, 1f
nop
/* Wheee, an asynchronous bus error... */
move a0, sp
jal ddb_buserror_irq
nop
j ret_from_irq
nop
1:
/* Here by mistake? This is possible, what can happen
* is that by the time we take the exception the IRQ
* pin goes low, so just leave if this is the case.
*/
andi a0, s0, (CAUSEF_IP4 | CAUSEF_IP5)
beq a0, zero, 1f
/* Must be one of the 8254 timers... */
move a0, sp
jal ddb_8254timer_irq
nop
1:
j ret_from_irq
nop
END(ddbIRQ)

26
arch/mips/ddb5xxx/ddb5074/irq.c
View File

@ -21,8 +21,6 @@
#include <asm/ddb5xxx/ddb5074.h>
extern asmlinkage void ddbIRQ(void);
static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
#define M1543_PNP_CONFIG 0x03f0 /* PnP Config Port */
@ -90,7 +88,7 @@ static void m1543_irq_setup(void)
}
void ddb_local0_irqdispatch(struct pt_regs *regs)
static void ddb_local0_irqdispatch(struct pt_regs *regs)
{
u32 mask;
int nile4_irq;
@ -118,29 +116,41 @@ void ddb_local0_irqdispatch(struct pt_regs *regs)
}
}
void ddb_local1_irqdispatch(void)
static void ddb_local1_irqdispatch(void)
{
printk("ddb_local1_irqdispatch called\n");
}
void ddb_buserror_irq(void)
static void ddb_buserror_irq(void)
{
printk("ddb_buserror_irq called\n");
}
void ddb_8254timer_irq(void)
static void ddb_8254timer_irq(void)
{
printk("ddb_8254timer_irq called\n");
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status();
if (pending & CAUSEF_IP2)
ddb_local0_irqdispatch(regs);
else if (pending & CAUSEF_IP3)
ddb_local1_irqdispatch();
else if (pending & CAUSEF_IP6)
ddb_buserror_irq();
else if (pending & (CAUSEF_IP4 | CAUSEF_IP5))
ddb_8254timer_irq();
}
void __init arch_init_irq(void)
{
/* setup cascade interrupts */
setup_irq(NILE4_IRQ_BASE + NILE4_INT_INTE, &irq_cascade);
setup_irq(CPU_IRQ_BASE + CPU_NILE4_CASCADE, &irq_cascade);
set_except_vector(0, ddbIRQ);
nile4_irq_setup(NILE4_IRQ_BASE);
m1543_irq_setup();
init_i8259_irqs();

2
arch/mips/ddb5xxx/ddb5476/Makefile
View File

@ -3,7 +3,7 @@
# under Linux.
#
obj-y += setup.o irq.o int-handler.o nile4_pic.o vrc5476_irq.o
obj-y += setup.o irq.o nile4_pic.o vrc5476_irq.o
obj-$(CONFIG_KGDB) += dbg_io.o
EXTRA_AFLAGS := $(CFLAGS)

112
arch/mips/ddb5xxx/ddb5476/int-handler.S
View File

@ -1,112 +0,0 @@
/*
* Copyright 2001 MontaVista Software Inc.
* Author: jsun@mvista.com or jsun@junsun.net
*
* First-level interrupt dispatcher for ddb5476
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/ddb5xxx/ddb5476.h>
/*
* first level interrupt dispatcher for ocelot board -
* We check for the timer first, then check PCI ints A and D.
* Then check for serial IRQ and fall through.
*/
.align 5
NESTED(ddb5476_handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
.set noreorder
mfc0 t0, CP0_CAUSE
mfc0 t2, CP0_STATUS
and t0, t2
andi t1, t0, STATUSF_IP7 /* cpu timer */
bnez t1, ll_cpu_ip7
andi t1, t0, STATUSF_IP2 /* vrc5476 & i8259 */
bnez t1, ll_cpu_ip2
andi t1, t0, STATUSF_IP3
bnez t1, ll_cpu_ip3
andi t1, t0, STATUSF_IP4
bnez t1, ll_cpu_ip4
andi t1, t0, STATUSF_IP5
bnez t1, ll_cpu_ip5
andi t1, t0, STATUSF_IP6
bnez t1, ll_cpu_ip6
andi t1, t0, STATUSF_IP0 /* software int 0 */
bnez t1, ll_cpu_ip0
andi t1, t0, STATUSF_IP1 /* software int 1 */
bnez t1, ll_cpu_ip1
nop
.set reorder
/* wrong alarm or masked ... */
// j spurious_interrupt
move a0, sp
jal vrc5476_irq_dispatch
j ret_from_irq
nop
.align 5
ll_cpu_ip0:
li a0, CPU_IRQ_BASE + 0
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip1:
li a0, CPU_IRQ_BASE + 1
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip2: /* jump to second-level dispatching */
move a0, sp
jal vrc5476_irq_dispatch
j ret_from_irq
ll_cpu_ip3:
li a0, CPU_IRQ_BASE + 3
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip4:
li a0, CPU_IRQ_BASE + 4
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip5:
li a0, CPU_IRQ_BASE + 5
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip6:
li a0, CPU_IRQ_BASE + 6
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip7:
li a0, CPU_IRQ_BASE + 7
move a1, sp
jal do_IRQ
j ret_from_irq
END(ddb5476_handle_int)

30
arch/mips/ddb5xxx/ddb5476/irq.c
View File

@ -110,11 +110,36 @@ static void nile4_irq_setup(void)
static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
static struct irqaction irq_error = { no_action, 0, CPU_MASK_NONE, "error", NULL, NULL };
extern asmlinkage void ddb5476_handle_int(void);
extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
extern void mips_cpu_irq_init(u32 irq_base);
extern void vrc5476_irq_init(u32 irq_base);
extern void vrc5476_irq_dispatch(struct pt_regs *regs);
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status();
if (pending & STATUSF_IP7)
do_IRQ(CPU_IRQ_BASE + 7, regs);
else if (pending & STATUSF_IP2)
vrc5476_irq_dispatch(regs);
else if (pending & STATUSF_IP3)
do_IRQ(CPU_IRQ_BASE + 3, regs);
else if (pending & STATUSF_IP4)
do_IRQ(CPU_IRQ_BASE + 4, regs);
else if (pending & STATUSF_IP5)
do_IRQ(CPU_IRQ_BASE + 5, regs);
else if (pending & STATUSF_IP6)
do_IRQ(CPU_IRQ_BASE + 6, regs);
else if (pending & STATUSF_IP0)
do_IRQ(CPU_IRQ_BASE, regs);
else if (pending & STATUSF_IP1)
do_IRQ(CPU_IRQ_BASE + 1, regs);
vrc5476_irq_dispatch(regs);
}
void __init arch_init_irq(void)
{
/* hardware initialization */
@ -137,7 +162,4 @@ void __init arch_init_irq(void)
setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_LBRT, &irq_error);
setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCIS, &irq_error);
setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCI, &irq_error);
/* setup the grandpa intr vector */
set_except_vector(0, ddb5476_handle_int);
}

6
arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c
View File

@ -77,11 +77,9 @@ vrc5476_irq_init(u32 base)
}
asmlinkage void
void
vrc5476_irq_dispatch(struct pt_regs *regs)
{
extern void spurious_interrupt(void);
u32 mask;
int nile4_irq;
@ -107,5 +105,5 @@ vrc5476_irq_dispatch(struct pt_regs *regs)
return;
}
}
spurious_interrupt();
spurious_interrupt(regs);
}

2
arch/mips/ddb5xxx/ddb5477/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for NEC DDB-Vrc5477 board
#
obj-y += int-handler.o irq.o irq_5477.o setup.o lcd44780.o
obj-y += irq.o irq_5477.o setup.o lcd44780.o
obj-$(CONFIG_RUNTIME_DEBUG) += debug.o
obj-$(CONFIG_KGDB) += kgdb_io.o

75
arch/mips/ddb5xxx/ddb5477/int-handler.S
View File

@ -1,75 +0,0 @@
/*
* Copyright 2001 MontaVista Software Inc.
* Author: jsun@mvista.com or jsun@junsun.net
*
* First-level interrupt dispatcher for ddb5477
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/ddb5xxx/ddb5477.h>
/*
* first level interrupt dispatcher for ocelot board -
* We check for the timer first, then check PCI ints A and D.
* Then check for serial IRQ and fall through.
*/
.align 5
NESTED(ddb5477_handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
.set noreorder
mfc0 t0, CP0_CAUSE
mfc0 t2, CP0_STATUS
and t0, t2
andi t1, t0, STATUSF_IP7 /* cpu timer */
bnez t1, ll_cputimer_irq
andi t1, t0, (STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 )
bnez t1, ll_vrc5477_irq
andi t1, t0, STATUSF_IP0 /* software int 0 */
bnez t1, ll_cpu_ip0
andi t1, t0, STATUSF_IP1 /* software int 1 */
bnez t1, ll_cpu_ip1
nop
.set reorder
/* wrong alarm or masked ... */
j spurious_interrupt
nop
END(ddb5477_handle_int)
.align 5
ll_vrc5477_irq:
move a0, sp
jal vrc5477_irq_dispatch
j ret_from_irq
ll_cputimer_irq:
li a0, CPU_IRQ_BASE + 7
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip0:
li a0, CPU_IRQ_BASE + 0
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip1:
li a0, CPU_IRQ_BASE + 1
move a1, sp
jal do_IRQ
j ret_from_irq

24
arch/mips/ddb5xxx/ddb5477/irq.c
View File

@ -75,7 +75,6 @@ set_pci_int_attr(u32 pci, u32 intn, u32 active, u32 trigger)
extern void vrc5477_irq_init(u32 base);
extern void mips_cpu_irq_init(u32 base);
extern asmlinkage void ddb5477_handle_int(void);
extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
@ -135,9 +134,6 @@ void __init arch_init_irq(void)
/* setup cascade interrupts */
setup_irq(VRC5477_IRQ_BASE + VRC5477_I8259_CASCADE, &irq_cascade);
setup_irq(CPU_IRQ_BASE + CPU_VRC5477_CASCADE, &irq_cascade);
/* hook up the first-level interrupt handler */
set_except_vector(0, ddb5477_handle_int);
}
u8 i8259_interrupt_ack(void)
@ -159,7 +155,7 @@ u8 i8259_interrupt_ack(void)
* the first level int-handler will jump here if it is a vrc5477 irq
*/
#define NUM_5477_IRQS 32
asmlinkage void
static void
vrc5477_irq_dispatch(struct pt_regs *regs)
{
u32 intStatus;
@ -197,3 +193,21 @@ vrc5477_irq_dispatch(struct pt_regs *regs)
}
}
}
#define VR5477INTS (STATUSF_IP2|STATUSF_IP3|STATUSF_IP4|STATUSF_IP5|STATUSF_IP6)
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status();
if (pending & STATUSF_IP7)
do_IRQ(CPU_IRQ_BASE + 7, regs);
else if (pending & VR5477INTS)
vrc5477_irq_dispatch(regs);
else if (pending & STATUSF_IP0)
do_IRQ(CPU_IRQ_BASE, regs);
else if (pending & STATUSF_IP1)
do_IRQ(CPU_IRQ_BASE + 1, regs);
else
spurious_interrupt(regs);
}

3
arch/mips/dec/boot/decstation.c
View File

@ -1,6 +1,7 @@
/*
* arch/mips/dec/decstation.c
*/
#include <asm/sections.h>
#define RELOC
#define INITRD
@ -24,7 +25,7 @@
#define INITRD_START (*(unsigned long *) (PARAM+0x218))
#define INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))
extern int _ftext, _end; /* begin and end of kernel image */
extern int _ftext; /* begin and end of kernel image */
extern void kernel_entry(int, char **, unsigned long, int *);
void * memcpy(void * dest, const void *src, unsigned int count)

14
arch/mips/dec/int-handler.S
View File

@ -36,7 +36,7 @@
.text
.set noreorder
/*
* decstation_handle_int: Interrupt handler for DECstations
* plat_irq_dispatch: Interrupt handler for DECstations
*
* We follow the model in the Indy interrupt code by David Miller, where he
* says: a lot of complication here is taken away because:
@ -125,11 +125,7 @@
* just take another exception, big deal.
*/
.align 5
NESTED(decstation_handle_int, PT_SIZE, ra)
.set noat
SAVE_ALL
CLI # TEST: interrupts should be off
.set at
NESTED(plat_irq_dispatch, PT_SIZE, ra)
.set noreorder
/*
@ -282,9 +278,11 @@ fpu:
#endif
spurious:
j spurious_interrupt
jal spurious_interrupt
nop
END(decstation_handle_int)
j ret_from_irq
nop
END(plat_irq_dispatch)
/*
* Generic unimplemented interrupt routines -- cpu_mask_nr_tbl

3
arch/mips/dec/setup.c
View File

@ -48,8 +48,6 @@ extern void dec_machine_halt(void);
extern void dec_machine_power_off(void);
extern irqreturn_t dec_intr_halt(int irq, void *dev_id, struct pt_regs *regs);
extern asmlinkage void decstation_handle_int(void);
unsigned long dec_kn_slot_base, dec_kn_slot_size;
EXPORT_SYMBOL(dec_kn_slot_base);
@ -744,7 +742,6 @@ void __init arch_init_irq(void)
panic("Don't know how to set this up!");
break;
}
set_except_vector(0, decstation_handle_int);
/* Free the FPU interrupt if the exception is present. */
if (!cpu_has_nofpuex) {

2
arch/mips/galileo-boards/ev96100/Makefile
View File

@ -6,4 +6,4 @@
# Makefile for the Galileo EV96100 board.
#
obj-y += init.o irq.o puts.o reset.o time.o int-handler.o setup.o
obj-y += init.o irq.o puts.o reset.o time.o setup.o

33
arch/mips/galileo-boards/ev96100/int-handler.S
View File

@ -1,33 +0,0 @@
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
.set noat
.align 5
NESTED(ev96100IRQ, PT_SIZE, sp)
SAVE_ALL
CLI # Important: mark KERNEL mode !
mfc0 t0, CP0_CAUSE # get pending interrupts
mfc0 t1, CP0_STATUS # get enabled interrupts
and t0, t1 # isolate allowed ones
# FIX ME add R7000 extensions
andi t0,0xff00 # isolate pending bits
andi a0, t0, CAUSEF_IP7
beq a0, zero, 1f
move a0, sp
jal mips_timer_interrupt
j ret_from_irq
1: beqz t0, 3f # spurious interrupt
move a0, t0
move a1, sp
jal ev96100_cpu_irq
j ret_from_irq
3: j spurious_interrupt
END(ev96100IRQ)

19
arch/mips/galileo-boards/ev96100/irq.c
View File

@ -40,8 +40,6 @@
#include <linux/interrupt.h>
#include <asm/irq_cpu.h>
extern asmlinkage void ev96100IRQ(void);
static inline unsigned int ffz8(unsigned int word)
{
unsigned long k;
@ -54,13 +52,26 @@ static inline unsigned int ffz8(unsigned int word)
return k;
}
asmlinkage void ev96100_cpu_irq(unsigned int pendin)
extern void mips_timer_interrupt(struct pt_regs *regs);
asmlinkage void ev96100_cpu_irq(unsigned int pending, struct pt_regs *regs)
{
do_IRQ(ffz8(pending >> 8), regs);
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
if (pending & CAUSEF_IP7)
mips_timer_interrupt(regs);
else if (pending)
ev96100_cpu_irq(pending, regs);
else
spurious_interrupt(regs);
}
void __init arch_init_irq(void)
{
set_except_vector(0, ev96100IRQ);
mips_cpu_irq_init(0);
}

2
arch/mips/gt64120/ev64120/Makefile
View File

@ -6,6 +6,6 @@
# Makefile for the Galileo EV64120 board.
#
obj-y += int-handler.o irq.o promcon.o reset.o serialGT.o setup.o
obj-y += irq.o promcon.o reset.o serialGT.o setup.o
EXTRA_AFLAGS := $(CFLAGS)

113
arch/mips/gt64120/ev64120/int-handler.S
View File

@ -1,113 +0,0 @@
/*
* int-handler.S
*
* Based on the cobalt handler.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
/*
* galileo_handle_int -
* We check for the timer first, then check PCI ints A and D.
* Then check for serial IRQ and fall through.
*/
.align 5
.set reorder
.set noat
NESTED(galileo_handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
mfc0 t0,CP0_CAUSE
mfc0 t2,CP0_STATUS
and t0,t2
andi t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */
bnez t1,ll_gt64120_irq
andi t1,t0,STATUSF_IP2 /* int0 hardware line */
bnez t1,ll_pci_intA
andi t1,t0,STATUSF_IP5 /* int3 hardware line */
bnez t1,ll_pci_intD
andi t1,t0,STATUSF_IP6 /* int4 hardware line */
bnez t1,ll_serial_irq
andi t1,t0,STATUSF_IP7 /* compare int */
bnez t1,ll_compare_irq
nop
/* wrong alarm or masked ... */
j spurious_interrupt
nop
END(galileo_handle_int)
.align 5
.set reorder
ll_gt64120_irq:
li a0,4
move a1,sp
jal do_IRQ
nop
j ret_from_irq
nop
.align 5
.set reorder
ll_compare_irq:
li a0,7
move a1,sp
jal do_IRQ
nop
j ret_from_irq
nop
.align 5
.set reorder
ll_pci_intA:
move a0,sp
jal pci_intA
nop
j ret_from_irq
nop
#if 0
.align 5
.set reorder
ll_pci_intB:
move a0,sp
jal pci_intB
nop
j ret_from_irq
nop
.align 5
.set reorder
ll_pci_intC:
move a0,sp
jal pci_intC
nop
j ret_from_irq
nop
#endif
.align 5
.set reorder
ll_pci_intD:
move a0,sp
jal pci_intD
nop
j ret_from_irq
nop
.align 5
.set reorder
ll_serial_irq:
li a0,6
move a1,sp
jal do_IRQ
nop
j ret_from_irq
nop

25
arch/mips/gt64120/ev64120/irq.c
View File

@ -46,14 +46,22 @@
#include <asm/system.h>
#include <asm/gt64120.h>
asmlinkage inline void pci_intA(struct pt_regs *regs)
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
do_IRQ(GT_INTA, regs);
}
unsigned int pending = read_c0_status() & read_c0_cause();
asmlinkage inline void pci_intD(struct pt_regs *regs)
{
do_IRQ(GT_INTD, regs);
if (pending & STATUSF_IP4) /* int2 hardware line (timer) */
do_IRQ(4, regs);
else if (pending & STATUSF_IP2) /* int0 hardware line */
do_IRQ(GT_INTA, regs);
else if (pending & STATUSF_IP5) /* int3 hardware line */
do_IRQ(GT_INTD, regs);
else if (pending & STATUSF_IP6) /* int4 hardware line */
do_IRQ(6, regs);
else if (pending & STATUSF_IP7) /* compare int */
do_IRQ(7, regs);
else
spurious_interrupt(regs);
}
static void disable_ev64120_irq(unsigned int irq_nr)
@ -109,16 +117,11 @@ static struct hw_interrupt_type ev64120_irq_type = {
void gt64120_irq_setup(void)
{
extern asmlinkage void galileo_handle_int(void);
/*
* Clear all of the interrupts while we change the able around a bit.
*/
clear_c0_status(ST0_IM);
/* Sets the exception_handler array. */
set_except_vector(0, galileo_handle_int);
local_irq_disable();
/*

2
arch/mips/gt64120/momenco_ocelot/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for Momentum's Ocelot board.
#
obj-y += int-handler.o irq.o prom.o reset.o setup.o
obj-y += irq.o prom.o reset.o setup.o
obj-$(CONFIG_KGDB) += dbg_io.o

131
arch/mips/gt64120/momenco_ocelot/int-handler.S
View File

@ -1,131 +0,0 @@
/*
* Copyright 2001 MontaVista Software Inc.
* Author: jsun@mvista.com or jsun@junsun.net
*
* First-level interrupt dispatcher for ocelot board.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
/*
* first level interrupt dispatcher for ocelot board -
* We check for the timer first, then check PCI ints A and D.
* Then check for serial IRQ and fall through.
*/
.align 5
NESTED(ocelot_handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
mfc0 t0, CP0_CAUSE
mfc0 t2, CP0_STATUS
and t0, t2
andi t1, t0, STATUSF_IP2 /* int0 hardware line */
bnez t1, ll_pri_enet_irq
andi t1, t0, STATUSF_IP3 /* int1 hardware line */
bnez t1, ll_sec_enet_irq
andi t1, t0, STATUSF_IP4 /* int2 hardware line */
bnez t1, ll_uart1_irq
andi t1, t0, STATUSF_IP5 /* int3 hardware line */
bnez t1, ll_cpci_irq
andi t1, t0, STATUSF_IP6 /* int4 hardware line */
bnez t1, ll_galileo_irq
andi t1, t0, STATUSF_IP7 /* cpu timer */
bnez t1, ll_cputimer_irq
/* now look at the extended interrupts */
mfc0 t0, CP0_CAUSE
cfc0 t1, CP0_S1_INTCONTROL
/* shift the mask 8 bits left to line up the bits */
sll t2, t1, 8
and t0, t2
srl t0, t0, 16
andi t1, t0, STATUSF_IP8 /* int6 hardware line */
bnez t1, ll_pmc1_irq
andi t1, t0, STATUSF_IP9 /* int7 hardware line */
bnez t1, ll_pmc2_irq
andi t1, t0, STATUSF_IP10 /* int8 hardware line */
bnez t1, ll_cpci_abcd_irq
andi t1, t0, STATUSF_IP11 /* int9 hardware line */
bnez t1, ll_uart2_irq
.set reorder
/* wrong alarm or masked ... */
j spurious_interrupt
nop
END(ocelot_handle_int)
.align 5
ll_pri_enet_irq:
li a0, 2
move a1, sp
jal do_IRQ
j ret_from_irq
ll_sec_enet_irq:
li a0, 3
move a1, sp
jal do_IRQ
j ret_from_irq
ll_uart1_irq:
li a0, 4
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpci_irq:
li a0, 5
move a1, sp
jal do_IRQ
j ret_from_irq
ll_galileo_irq:
li a0, 6
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cputimer_irq:
li a0, 7
move a1, sp
jal do_IRQ
j ret_from_irq
ll_pmc1_irq:
li a0, 8
move a1, sp
jal do_IRQ
j ret_from_irq
ll_pmc2_irq:
li a0, 9
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpci_abcd_irq:
li a0, 10
move a1, sp
jal do_IRQ
j ret_from_irq
ll_uart2_irq:
li a0, 11
move a1, sp
jal do_IRQ
j ret_from_irq

36
arch/mips/gt64120/momenco_ocelot/irq.c
View File

@ -48,7 +48,38 @@
#include <asm/mipsregs.h>
#include <asm/system.h>
extern asmlinkage void ocelot_handle_int(void);
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_status() & read_c0_cause();
if (pending & STATUSF_IP2) /* int0 hardware line */
do_IRQ(2, regs);
else if (pending & STATUSF_IP3) /* int1 hardware line */
do_IRQ(3, regs);
else if (pending & STATUSF_IP4) /* int2 hardware line */
do_IRQ(4, regs);
else if (pending & STATUSF_IP5) /* int3 hardware line */
do_IRQ(5, regs);
else if (pending & STATUSF_IP6) /* int4 hardware line */
do_IRQ(6, regs);
else if (pending & STATUSF_IP7) /* cpu timer */
do_IRQ(7, regs);
else {
/*
* Now look at the extended interrupts
*/
pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
if (pending & STATUSF_IP8) /* int6 hardware line */
do_IRQ(8, regs);
else if (pending & STATUSF_IP9) /* int7 hardware line */
do_IRQ(9, regs);
else if (pending & STATUSF_IP10) /* int8 hardware line */
do_IRQ(10, regs);
else if (pending & STATUSF_IP11) /* int9 hardware line */
do_IRQ(11, regs);
}
}
void __init arch_init_irq(void)
{
@ -59,9 +90,6 @@ void __init arch_init_irq(void)
clear_c0_status(ST0_IM);
local_irq_disable();
/* Sets the first-level interrupt dispatcher. */
set_except_vector(0, ocelot_handle_int);
mips_cpu_irq_init(0);
rm7k_cpu_irq_init(8);
}

2
arch/mips/ite-boards/generic/Makefile
View File

@ -6,7 +6,7 @@
# Makefile for the ITE 8172 (qed-4n-s01b) board, generic files.
#
obj-y += it8172_setup.o irq.o int-handler.o pmon_prom.o \
obj-y += it8172_setup.o irq.o pmon_prom.o \
time.o lpc.o puts.o reset.o
obj-$(CONFIG_IT8172_CIR)+= it8172_cir.o

63
arch/mips/ite-boards/generic/int-handler.S
View File

@ -1,63 +0,0 @@
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
.text
.set macro
.set noat
.align 5
NESTED(it8172_IRQ, PT_SIZE, sp)
SAVE_ALL
CLI # Important: mark KERNEL mode !
/* We're working with 'reorder' set at this point. */
/*
* Get pending interrupts
*/
mfc0 t0,CP0_CAUSE # get pending interrupts
mfc0 t1,CP0_STATUS # get enabled interrupts
and t0,t1 # isolate allowed ones
andi t0,0xff00 # isolate pending bits
beqz t0, 3f # spurious interrupt
andi a0, t0, CAUSEF_IP7
beq a0, zero, 1f
li a0, 127 # MIPS_CPU_TIMER_IRQ = (NR_IRQS-1)
move a1, sp
jal ll_timer_interrupt
j ret_from_irq
nop
1:
andi a0, t0, CAUSEF_IP2 # the only int we expect at this time
beq a0, zero, 3f
move a0,sp
jal it8172_hw0_irqdispatch
mfc0 t0,CP0_STATUS # disable interrupts
ori t0,1
xori t0,1
mtc0 t0,CP0_STATUS
nop
nop
nop
la a1, ret_from_irq
jr a1
nop
3:
move a0, sp
jal mips_spurious_interrupt
nop
la a1, ret_from_irq
jr a1
nop
END(it8172_IRQ)

18
arch/mips/ite-boards/generic/irq.c
View File

@ -62,12 +62,8 @@
#define ALLINTS_NOTIMER (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4)
void disable_it8172_irq(unsigned int irq_nr);
void enable_it8172_irq(unsigned int irq_nr);
extern void set_debug_traps(void);
extern void mips_timer_interrupt(int irq, struct pt_regs *regs);
extern asmlinkage void it8172_IRQ(void);
struct it8172_intc_regs volatile *it8172_hw0_icregs =
(struct it8172_intc_regs volatile *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_INTC_BASE));
@ -181,8 +177,6 @@ void __init arch_init_irq(void)
int i;
unsigned long flags;
set_except_vector(0, it8172_IRQ);
/* mask all interrupts */
it8172_hw0_icregs->lb_mask = 0xffff;
it8172_hw0_icregs->lpc_mask = 0xffff;
@ -282,6 +276,18 @@ void it8172_hw0_irqdispatch(struct pt_regs *regs)
do_IRQ(irq, regs);
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
if (!pending)
mips_spurious_interrupt(regs);
else if (pending & CAUSEF_IP7)
ll_timer_interrupt(127, regs);
else if (pending & CAUSEF_IP2)
it8172_hw0_irqdispatch(regs);
}
void show_pending_irqs(void)
{
fputs("intstatus: ");

1
arch/mips/ite-boards/generic/time.c
View File

@ -29,6 +29,7 @@
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/spinlock.h>
#include <linux/mc146818rtc.h>
#include <asm/time.h>
#include <asm/mipsregs.h>

2
arch/mips/ite-boards/ivr/init.c
View File

@ -34,13 +34,13 @@
#include <asm/bootinfo.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <asm/sections.h>
#include <asm/it8172/it8172.h>
#include <asm/it8172/it8172_dbg.h>
int prom_argc;
char **prom_argv, **prom_envp;
extern char _end;
extern void __init prom_init_cmdline(void);
extern unsigned long __init prom_get_memsize(void);
extern void __init it8172_init_ram_resource(unsigned long memsize);

2
arch/mips/ite-boards/qed-4n-s01b/init.c
View File

@ -34,13 +34,13 @@
#include <asm/bootinfo.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <asm/sections.h>
#include <asm/it8172/it8172.h>
#include <asm/it8172/it8172_dbg.h>
int prom_argc;
char **prom_argv, **prom_envp;
extern char _end;
extern void __init prom_init_cmdline(void);
extern unsigned long __init prom_get_memsize(void);
extern void __init it8172_init_ram_resource(unsigned long memsize);

2
arch/mips/jazz/Makefile
View File

@ -2,6 +2,6 @@
# Makefile for the Jazz family specific parts of the kernel
#
obj-y := int-handler.o irq.o jazzdma.o reset.o setup.o
obj-y := irq.o jazzdma.o reset.o setup.o
EXTRA_AFLAGS := $(CFLAGS)

282
arch/mips/jazz/int-handler.S
View File

@ -1,282 +0,0 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle and Andreas Busse
*
* Jazz family specific interrupt stuff
*
* To do: On Jazz machines we remap some non-ISA interrupts to ISA
* interrupts. These interrupts should use their own vectors.
* Squeeze the last cycles out of the handlers. Only a dead
* cycle is a good cycle.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/jazz.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
/*
* jazz_handle_int: Interrupt handler for the ACER Pica-61 boards
*/
.set noreorder
NESTED(jazz_handle_int, PT_SIZE, ra)
.set noat
SAVE_ALL
CLI
.set at
/*
* Get pending interrupts
*/
mfc0 t0,CP0_CAUSE # get pending interrupts
mfc0 t1,CP0_STATUS # get enabled interrupts
and t0,t1 # isolate allowed ones
andi t0,0xff00 # isolate pending bits
beqz t0,3f
sll t0,16 # delay slot
/*
* Find irq with highest priority
* FIXME: This is slow - use binary search
*/
la t1,ll_vectors
1: bltz t0,2f # found pending irq
sll t0,1
b 1b
subu t1,PTRSIZE # delay slot
/*
* Do the low-level stuff
*/
2: lw t0,(t1)
jr t0
nop # delay slot
END(jazz_handle_int)
ll_sw0: li s1,~IE_SW0
mfc0 t0,CP0_CAUSE
and t0,s1
mtc0 t0,CP0_CAUSE
PANIC("Unimplemented sw0 handler")
ll_sw1: li s1,~IE_SW1
mfc0 t0,CP0_CAUSE
and t0,s1
mtc0 t0,CP0_CAUSE
PANIC("Unimplemented sw1 handler")
ll_local_dma: li s1,~IE_IRQ0
PANIC("Unimplemented local_dma handler")
ll_local_dev: lbu t0,JAZZ_IO_IRQ_SOURCE
#if PTRSIZE == 8 /* True 64 bit kernel */
dsll t0,1
#endif
.set reorder
LONG_L t0,local_vector(t0)
jr t0
.set noreorder
/*
* The braindead PICA hardware gives us no way to distinguish if we really
* received interrupt 7 from the (E)ISA bus or if we just received an
* interrupt with no findable cause. This sometimes happens with braindead
* cards. Oh well - for all the Jazz boxes slots are more or less just
* whistles and bells and we're aware of the problem.
*/
ll_isa_irq: lw a0, JAZZ_EISA_IRQ_ACK
jal do_IRQ
move a1,sp
j ret_from_irq
nop
/*
* Hmm... This is not just a plain PC clone so the question is
* which devices on Jazz machines can generate an (E)ISA NMI?
* (Writing to nonexistent memory?)
*/
ll_isa_nmi: li s1,~IE_IRQ3
PANIC("Unimplemented isa_nmi handler")
/*
* Timer IRQ - remapped to be more similar to an IBM compatible.
*
* The timer interrupt is handled specially to ensure that the jiffies
* variable is updated at all times. Specifically, the timer interrupt is
* just like the complete handlers except that it is invoked with interrupts
* disabled and should never re-enable them. If other interrupts were
* allowed to be processed while the timer interrupt is active, then the
* other interrupts would have to avoid using the jiffies variable for delay
* and interval timing operations to avoid hanging the system.
*/
ll_timer: lw zero,JAZZ_TIMER_REGISTER # timer irq cleared on read
li s1,~IE_IRQ4
li a0, JAZZ_TIMER_IRQ
jal do_IRQ
move a1,sp
mfc0 t0,CP0_STATUS # disable interrupts again
ori t0,1
xori t0,1
mtc0 t0,CP0_STATUS
j ret_from_irq
nop
/*
* CPU count/compare IRQ (unused)
*/
ll_count: j ret_from_irq
mtc0 zero,CP0_COMPARE
#if 0
/*
* Call the handler for the interrupt
* (Currently unused)
*/
call_real: /*
* temporarily disable interrupt
*/
mfc0 t2,CP0_STATUS
and t2,s1
mtc0 t2,CP0_STATUS
nor s1,zero,s1
jal do_IRQ
/*
* reenable interrupt
*/
mfc0 t2,CP0_STATUS
or t2,s1
mtc0 t2,CP0_STATUS
j ret_from_irq
#endif
.data
PTR ll_sw0 # SW0
PTR ll_sw1 # SW1
PTR ll_local_dma # Local DMA
PTR ll_local_dev # Local devices
PTR ll_isa_irq # ISA IRQ
PTR ll_isa_nmi # ISA NMI
PTR ll_timer # Timer
ll_vectors: PTR ll_count # Count/Compare IRQ
/*
* Interrupt handlers for local devices.
*/
.text
.set reorder
loc_no_irq: PANIC("Unimplemented loc_no_irq handler")
/*
* Parallel port IRQ
*/
loc_parallel: li s1,~JAZZ_IE_PARALLEL
li a0,JAZZ_PARALLEL_IRQ
b loc_call
/*
* Floppy IRQ
*/
loc_floppy: li s1,~JAZZ_IE_FLOPPY
li a0,JAZZ_FLOPPY_IRQ
b loc_call
/*
* Sound IRQ
*/
loc_sound: PANIC("Unimplemented loc_sound handler")
loc_video: PANIC("Unimplemented loc_video handler")
/*
* Ethernet interrupt handler
*/
loc_ethernet: li s1,~JAZZ_IE_ETHERNET
li a0,JAZZ_ETHERNET_IRQ
b loc_call
/*
* SCSI interrupt handler
*/
loc_scsi: li s1,~JAZZ_IE_SCSI
li a0,JAZZ_SCSI_IRQ
b loc_call
/*
* Keyboard interrupt handler
*/
loc_keyboard: li s1,~JAZZ_IE_KEYBOARD
li a0,JAZZ_KEYBOARD_IRQ
b loc_call
/*
* Mouse interrupt handler
*/
loc_mouse: li s1,~JAZZ_IE_MOUSE
li a0,JAZZ_MOUSE_IRQ
b loc_call
/*
* Serial port 1 IRQ
*/
loc_serial1: li s1,~JAZZ_IE_SERIAL1
li a0,JAZZ_SERIAL1_IRQ
b loc_call
/*
* Serial port 2 IRQ
*/
loc_serial2: li s1,~JAZZ_IE_SERIAL2
li a0,JAZZ_SERIAL2_IRQ
b loc_call
/*
* Call the interrupt handler for an interrupt generated by a
* local device.
*/
loc_call: /*
* Temporarily disable interrupt source
*/
lhu t2,JAZZ_IO_IRQ_ENABLE
and t2,s1
sh t2,JAZZ_IO_IRQ_ENABLE
nor s1,zero,s1
jal do_IRQ
/*
* Reenable interrupt
*/
lhu t2,JAZZ_IO_IRQ_ENABLE
or t2,s1
sh t2,JAZZ_IO_IRQ_ENABLE
j ret_from_irq
/*
* "Jump extender" to reach spurious_interrupt
*/
3: j spurious_interrupt
/*
* Vectors for interrupts generated by local devices
*/
.data
local_vector: PTR loc_no_irq
PTR loc_parallel
PTR loc_floppy
PTR loc_sound
PTR loc_video
PTR loc_ethernet
PTR loc_scsi
PTR loc_keyboard
PTR loc_mouse
PTR loc_serial1
PTR loc_serial2

78
arch/mips/jazz/irq.c
View File

@ -15,8 +15,6 @@
#include <asm/io.h>
#include <asm/jazz.h>
extern asmlinkage void jazz_handle_int(void);
static DEFINE_SPINLOCK(r4030_lock);
static void enable_r4030_irq(unsigned int irq)
@ -90,10 +88,82 @@ void __init init_r4030_ints(void)
*/
void __init arch_init_irq(void)
{
set_except_vector(0, jazz_handle_int);
init_i8259_irqs(); /* Integrated i8259 */
init_r4030_ints();
change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
}
static void loc_call(unsigned int irq, struct pt_regs *regs, unsigned int mask)
{
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask);
do_IRQ(irq, regs);
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask);
}
static void ll_local_dev(struct pt_regs *regs)
{
switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) {
case 0:
panic("Unimplemented loc_no_irq handler");
break;
case 4:
loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_PARALLEL);
break;
case 8:
loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_FLOPPY);
break;
case 12:
panic("Unimplemented loc_sound handler");
break;
case 16:
panic("Unimplemented loc_video handler");
break;
case 20:
loc_call(JAZZ_ETHERNET_IRQ, regs, JAZZ_IE_ETHERNET);
break;
case 24:
loc_call(JAZZ_SCSI_IRQ, regs, JAZZ_IE_SCSI);
break;
case 28:
loc_call(JAZZ_KEYBOARD_IRQ, regs, JAZZ_IE_KEYBOARD);
break;
case 32:
loc_call(JAZZ_MOUSE_IRQ, regs, JAZZ_IE_MOUSE);
break;
case 36:
loc_call(JAZZ_SERIAL1_IRQ, regs, JAZZ_IE_SERIAL1);
break;
case 40:
loc_call(JAZZ_SERIAL2_IRQ, regs, JAZZ_IE_SERIAL2);
break;
}
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
if (pending & IE_IRQ5)
write_c0_compare(0);
else if (pending & IE_IRQ4) {
r4030_read_reg32(JAZZ_TIMER_REGISTER);
do_IRQ(JAZZ_TIMER_IRQ, regs);
} else if (pending & IE_IRQ3)
panic("Unimplemented ISA NMI handler");
else if (pending & IE_IRQ2)
do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK), regs);
else if (pending & IE_IRQ1) {
ll_local_dev(regs);
} else if (unlikely(pending & IE_IRQ0))
panic("Unimplemented local_dma handler");
else if (pending & IE_SW1) {
clear_c0_cause(IE_SW1);
panic("Unimplemented sw1 handler");
} else if (pending & IE_SW0) {
clear_c0_cause(IE_SW0);
panic("Unimplemented sw0 handler");
}
}

60
arch/mips/jmr3927/common/rtc_ds1742.c
View File

@ -60,15 +60,15 @@ rtc_ds1742_get_time(void)
unsigned long flags;
spin_lock_irqsave(&rtc_lock, flags);
CMOS_WRITE(RTC_READ, RTC_CONTROL);
second = BCD2BIN(CMOS_READ(RTC_SECONDS) & RTC_SECONDS_MASK);
minute = BCD2BIN(CMOS_READ(RTC_MINUTES));
hour = BCD2BIN(CMOS_READ(RTC_HOURS));
day = BCD2BIN(CMOS_READ(RTC_DATE));
month = BCD2BIN(CMOS_READ(RTC_MONTH));
year = BCD2BIN(CMOS_READ(RTC_YEAR));
century = BCD2BIN(CMOS_READ(RTC_CENTURY) & RTC_CENTURY_MASK);
CMOS_WRITE(0, RTC_CONTROL);
rtc_write(RTC_READ, RTC_CONTROL);
second = BCD2BIN(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
minute = BCD2BIN(rtc_read(RTC_MINUTES));
hour = BCD2BIN(rtc_read(RTC_HOURS));
day = BCD2BIN(rtc_read(RTC_DATE));
month = BCD2BIN(rtc_read(RTC_MONTH));
year = BCD2BIN(rtc_read(RTC_YEAR));
century = BCD2BIN(rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK);
rtc_write(0, RTC_CONTROL);
spin_unlock_irqrestore(&rtc_lock, flags);
year += century * 100;
@ -87,16 +87,16 @@ rtc_ds1742_set_time(unsigned long t)
unsigned long flags;
spin_lock_irqsave(&rtc_lock, flags);
CMOS_WRITE(RTC_READ, RTC_CONTROL);
cmos_second = (u8)(CMOS_READ(RTC_SECONDS) & RTC_SECONDS_MASK);
cmos_minute = (u8)CMOS_READ(RTC_MINUTES);
cmos_hour = (u8)CMOS_READ(RTC_HOURS);
cmos_day = (u8)CMOS_READ(RTC_DATE);
cmos_month = (u8)CMOS_READ(RTC_MONTH);
cmos_year = (u8)CMOS_READ(RTC_YEAR);
cmos_century = CMOS_READ(RTC_CENTURY) & RTC_CENTURY_MASK;
rtc_write(RTC_READ, RTC_CONTROL);
cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
cmos_minute = (u8)rtc_read(RTC_MINUTES);
cmos_hour = (u8)rtc_read(RTC_HOURS);
cmos_day = (u8)rtc_read(RTC_DATE);
cmos_month = (u8)rtc_read(RTC_MONTH);
cmos_year = (u8)rtc_read(RTC_YEAR);
cmos_century = rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK;
CMOS_WRITE(RTC_WRITE, RTC_CONTROL);
rtc_write(RTC_WRITE, RTC_CONTROL);
/* convert */
to_tm(t, &tm);
@ -104,18 +104,18 @@ rtc_ds1742_set_time(unsigned long t)
/* check each field one by one */
year = BIN2BCD(tm.tm_year - EPOCH);
if (year != cmos_year) {
CMOS_WRITE(year,RTC_YEAR);
rtc_write(year,RTC_YEAR);
}
month = BIN2BCD(tm.tm_mon);
if (month != (cmos_month & 0x1f)) {
CMOS_WRITE((month & 0x1f) | (cmos_month & ~0x1f),RTC_MONTH);
rtc_write((month & 0x1f) | (cmos_month & ~0x1f),RTC_MONTH);
}
day = BIN2BCD(tm.tm_mday);
if (day != cmos_day) {
CMOS_WRITE(day, RTC_DATE);
rtc_write(day, RTC_DATE);
}
if (cmos_hour & 0x40) {
@ -130,20 +130,20 @@ rtc_ds1742_set_time(unsigned long t)
/* 24 hour format */
hour = BIN2BCD(tm.tm_hour) & 0x3f;
}
if (hour != cmos_hour) CMOS_WRITE(hour, RTC_HOURS);
if (hour != cmos_hour) rtc_write(hour, RTC_HOURS);
minute = BIN2BCD(tm.tm_min);
if (minute != cmos_minute) {
CMOS_WRITE(minute, RTC_MINUTES);
rtc_write(minute, RTC_MINUTES);
}
second = BIN2BCD(tm.tm_sec);
if (second != cmos_second) {
CMOS_WRITE(second & RTC_SECONDS_MASK,RTC_SECONDS);
rtc_write(second & RTC_SECONDS_MASK,RTC_SECONDS);
}
/* RTC_CENTURY and RTC_CONTROL share same address... */
CMOS_WRITE(cmos_century, RTC_CONTROL);
rtc_write(cmos_century, RTC_CONTROL);
spin_unlock_irqrestore(&rtc_lock, flags);
return 0;
@ -163,9 +163,9 @@ rtc_ds1742_init(unsigned long base)
rtc_mips_set_time = rtc_ds1742_set_time;
/* clear oscillator stop bit */
CMOS_WRITE(RTC_READ, RTC_CONTROL);
cmos_second = (u8)(CMOS_READ(RTC_SECONDS) & RTC_SECONDS_MASK);
CMOS_WRITE(RTC_WRITE, RTC_CONTROL);
CMOS_WRITE(cmos_second, RTC_SECONDS); /* clear msb */
CMOS_WRITE(0, RTC_CONTROL);
rtc_write(RTC_READ, RTC_CONTROL);
cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
rtc_write(RTC_WRITE, RTC_CONTROL);
rtc_write(cmos_second, RTC_SECONDS); /* clear msb */
rtc_write(0, RTC_CONTROL);
}

2
arch/mips/jmr3927/rbhma3100/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for TOSHIBA JMR-TX3927 board
#
obj-y += init.o int-handler.o irq.o setup.o
obj-y += init.o irq.o setup.o
obj-$(CONFIG_RUNTIME_DEBUG) += debug.o
obj-$(CONFIG_KGDB) += kgdb_io.o

74
arch/mips/jmr3927/rbhma3100/int-handler.S
View File

@ -1,74 +0,0 @@
/*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ahennessy@mvista.com
*
* Based on arch/mips/tsdb/kernel/int-handler.S
*
* Copyright (C) 2000-2001 Toshiba Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/jmr3927/jmr3927.h>
/* A lot of complication here is taken away because:
*
* 1) We handle one interrupt and return, sitting in a loop
* and moving across all the pending IRQ bits in the cause
* register is _NOT_ the answer, the common case is one
* pending IRQ so optimize in that direction.
*
* 2) We need not check against bits in the status register
* IRQ mask, that would make this routine slow as hell.
*
* 3) Linux only thinks in terms of all IRQs on or all IRQs
* off, nothing in between like BSD spl() brain-damage.
*
*/
/* Flush write buffer (needed?)
* NOTE: TX39xx performs "non-blocking load", so explicitly use the target
* register of LBU to flush immediately.
*/
#define FLUSH_WB(tmp) \
la tmp, JMR3927_IOC_REV_ADDR; \
lbu tmp, (tmp); \
move tmp, zero;
.text
.set noreorder
.set noat
.align 5
NESTED(jmr3927_IRQ, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
jal jmr3927_irc_irqdispatch
move a0, sp
FLUSH_WB(t0)
j ret_from_irq
nop
END(jmr3927_IRQ)

6
arch/mips/jmr3927/rbhma3100/irq.c
View File

@ -77,8 +77,6 @@ static int jmr3927_gen_iack(void)
}
#endif
extern asmlinkage void jmr3927_IRQ(void);
#define irc_dlevel 0
#define irc_elevel 1
@ -262,7 +260,7 @@ void jmr3927_spurious(struct pt_regs *regs)
regs->cp0_cause, regs->cp0_epc, regs->regs[31]);
}
void jmr3927_irc_irqdispatch(struct pt_regs *regs)
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
int irq;
@ -398,8 +396,6 @@ void __init arch_init_irq(void)
jmr3927_irq_init(NR_ISA_IRQS);
set_except_vector(0, jmr3927_IRQ);
/* setup irq space */
add_tb_irq_space(&jmr3927_isac_irqspace);
add_tb_irq_space(&jmr3927_ioc_irqspace);

5
arch/mips/kernel/Makefile
View File

@ -34,8 +34,11 @@ obj-$(CONFIG_CPU_R6000) += r6000_fpu.o r4k_switch.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_MIPS_MT_SMP) += smp_mt.o
obj-$(CONFIG_MIPS_MT) += mips-mt.o
obj-$(CONFIG_MIPS_MT_SMTC) += smtc.o smtc-asm.o smtc-proc.o
obj-$(CONFIG_MIPS_MT_SMP) += smp-mt.o
obj-$(CONFIG_MIPS_APSP_KSPD) += kspd.o
obj-$(CONFIG_MIPS_VPE_LOADER) += vpe.o
obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o

3
arch/mips/kernel/asm-offsets.c
View File

@ -69,6 +69,9 @@ void output_ptreg_defines(void)
offset("#define PT_BVADDR ", struct pt_regs, cp0_badvaddr);
offset("#define PT_STATUS ", struct pt_regs, cp0_status);
offset("#define PT_CAUSE ", struct pt_regs, cp0_cause);
#ifdef CONFIG_MIPS_MT_SMTC
offset("#define PT_TCSTATUS ", struct pt_regs, cp0_tcstatus);
#endif /* CONFIG_MIPS_MT_SMTC */
size("#define PT_SIZE ", struct pt_regs);
linefeed;
}

69
arch/mips/kernel/entry.S
View File

@ -17,6 +17,9 @@
#include <asm/isadep.h>
#include <asm/thread_info.h>
#include <asm/war.h>
#ifdef CONFIG_MIPS_MT_SMTC
#include <asm/mipsmtregs.h>
#endif
#ifdef CONFIG_PREEMPT
.macro preempt_stop
@ -75,6 +78,37 @@ FEXPORT(syscall_exit)
bnez t0, syscall_exit_work
FEXPORT(restore_all) # restore full frame
#ifdef CONFIG_MIPS_MT_SMTC
/* Detect and execute deferred IPI "interrupts" */
move a0,sp
jal deferred_smtc_ipi
/* Re-arm any temporarily masked interrupts not explicitly "acked" */
mfc0 v0, CP0_TCSTATUS
ori v1, v0, TCSTATUS_IXMT
mtc0 v1, CP0_TCSTATUS
andi v0, TCSTATUS_IXMT
ehb
mfc0 t0, CP0_TCCONTEXT
DMT 9 # dmt t1
jal mips_ihb
mfc0 t2, CP0_STATUS
andi t3, t0, 0xff00
or t2, t2, t3
mtc0 t2, CP0_STATUS
ehb
andi t1, t1, VPECONTROL_TE
beqz t1, 1f
EMT
1:
mfc0 v1, CP0_TCSTATUS
/* We set IXMT above, XOR should cler it here */
xori v1, v1, TCSTATUS_IXMT
or v1, v0, v1
mtc0 v1, CP0_TCSTATUS
ehb
xor t0, t0, t3
mtc0 t0, CP0_TCCONTEXT
#endif /* CONFIG_MIPS_MT_SMTC */
.set noat
RESTORE_TEMP
RESTORE_AT
@ -120,28 +154,17 @@ syscall_exit_work:
jal do_syscall_trace
b resume_userspace
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_MIPS_MT)
/*
* Common spurious interrupt handler.
* MIPS32R2 Instruction Hazard Barrier - must be called
*
* For C code use the inline version named instruction_hazard().
*/
LEAF(spurious_interrupt)
/*
* Someone tried to fool us by sending an interrupt but we
* couldn't find a cause for it.
*/
PTR_LA t1, irq_err_count
#ifdef CONFIG_SMP
1: ll t0, (t1)
addiu t0, 1
sc t0, (t1)
#if R10000_LLSC_WAR
beqzl t0, 1b
#else
beqz t0, 1b
#endif
#else
lw t0, (t1)
addiu t0, 1
sw t0, (t1)
#endif
j ret_from_irq
END(spurious_interrupt)
LEAF(mips_ihb)
.set mips32r2
jr.hb ra
nop
END(mips_ihb)
#endif /* CONFIG_CPU_MIPSR2 or CONFIG_MIPS_MT */

24
arch/mips/kernel/gdb-low.S
View File

@ -283,11 +283,33 @@
*/
3:
#ifdef CONFIG_MIPS_MT_SMTC
/* Read-modify write of Status must be atomic */
mfc0 t2, CP0_TCSTATUS
ori t1, t2, TCSTATUS_IXMT
mtc0 t1, CP0_TCSTATUS
andi t2, t2, TCSTATUS_IXMT
ehb
DMT 9 # dmt t1
jal mips_ihb
nop
#endif /* CONFIG_MIPS_MT_SMTC */
mfc0 t0, CP0_STATUS
ori t0, 0x1f
xori t0, 0x1f
mtc0 t0, CP0_STATUS
#ifdef CONFIG_MIPS_MT_SMTC
andi t1, t1, VPECONTROL_TE
beqz t1, 9f
nop
EMT # emt
9:
mfc0 t1, CP0_TCSTATUS
xori t1, t1, TCSTATUS_IXMT
or t1, t1, t2
mtc0 t1, CP0_TCSTATUS
ehb
#endif /* CONFIG_MIPS_MT_SMTC */
LONG_L v0, GDB_FR_STATUS(sp)
LONG_L v1, GDB_FR_EPC(sp)
mtc0 v0, CP0_STATUS

61
arch/mips/kernel/gdb-stub.c
View File

@ -140,6 +140,7 @@
#include <asm/system.h>
#include <asm/gdb-stub.h>
#include <asm/inst.h>
#include <asm/smp.h>
/*
* external low-level support routines
@ -669,6 +670,64 @@ static void kgdb_wait(void *arg)
local_irq_restore(flags);
}
/*
* GDB stub needs to call kgdb_wait on all processor with interrupts
* disabled, so it uses it's own special variant.
*/
static int kgdb_smp_call_kgdb_wait(void)
{
#ifdef CONFIG_SMP
struct call_data_struct data;
int i, cpus = num_online_cpus() - 1;
int cpu = smp_processor_id();
/*
* Can die spectacularly if this CPU isn't yet marked online
*/
BUG_ON(!cpu_online(cpu));
if (!cpus)
return 0;
if (spin_is_locked(&smp_call_lock)) {
/*
* Some other processor is trying to make us do something
* but we're not going to respond... give up
*/
return -1;
}
/*
* We will continue here, accepting the fact that
* the kernel may deadlock if another CPU attempts
* to call smp_call_function now...
*/
data.func = kgdb_wait;
data.info = NULL;
atomic_set(&data.started, 0);
data.wait = 0;
spin_lock(&smp_call_lock);
call_data = &data;
mb();
/* Send a message to all other CPUs and wait for them to respond */
for (i = 0; i < NR_CPUS; i++)
if (cpu_online(i) && i != cpu)
core_send_ipi(i, SMP_CALL_FUNCTION);
/* Wait for response */
/* FIXME: lock-up detection, backtrace on lock-up */
while (atomic_read(&data.started) != cpus)
barrier();
call_data = NULL;
spin_unlock(&smp_call_lock);
#endif
return 0;
}
/*
* This function does all command processing for interfacing to gdb. It
@ -718,7 +777,7 @@ void handle_exception (struct gdb_regs *regs)
/*
* force other cpus to enter kgdb
*/
smp_call_function(kgdb_wait, NULL, 0, 0);
kgdb_smp_call_kgdb_wait();
/*
* If we're in breakpoint() increment the PC

43
arch/mips/kernel/genex.S
View File

@ -12,6 +12,7 @@
#include <linux/init.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/cacheops.h>
#include <asm/regdef.h>
#include <asm/fpregdef.h>
@ -122,6 +123,20 @@ handle_vcei:
.set pop
END(except_vec3_r4000)
__FINIT
.align 5
NESTED(handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
PTR_LA ra, ret_from_irq
move a0, sp
j plat_irq_dispatch
END(handle_int)
__INIT
/*
* Special interrupt vector for MIPS64 ISA & embedded MIPS processors.
* This is a dedicated interrupt exception vector which reduces the
@ -157,6 +172,15 @@ NESTED(except_vec_vi, 0, sp)
SAVE_AT
.set push
.set noreorder
#ifdef CONFIG_MIPS_MT_SMTC
/*
* To keep from blindly blocking *all* interrupts
* during service by SMTC kernel, we also want to
* pass the IM value to be cleared.
*/
EXPORT(except_vec_vi_mori)
ori a0, $0, 0
#endif /* CONFIG_MIPS_MT_SMTC */
EXPORT(except_vec_vi_lui)
lui v0, 0 /* Patched */
j except_vec_vi_handler
@ -173,6 +197,25 @@ EXPORT(except_vec_vi_end)
NESTED(except_vec_vi_handler, 0, sp)
SAVE_TEMP
SAVE_STATIC
#ifdef CONFIG_MIPS_MT_SMTC
/*
* SMTC has an interesting problem that interrupts are level-triggered,
* and the CLI macro will clear EXL, potentially causing a duplicate
* interrupt service invocation. So we need to clear the associated
* IM bit of Status prior to doing CLI, and restore it after the
* service routine has been invoked - we must assume that the
* service routine will have cleared the state, and any active
* level represents a new or otherwised unserviced event...
*/
mfc0 t1, CP0_STATUS
and t0, a0, t1
mfc0 t2, CP0_TCCONTEXT
or t0, t0, t2
mtc0 t0, CP0_TCCONTEXT
xor t1, t1, t0
mtc0 t1, CP0_STATUS
ehb
#endif /* CONFIG_MIPS_MT_SMTC */
CLI
move a0, sp
jalr v0

57
arch/mips/kernel/head.S
View File

@ -18,6 +18,7 @@
#include <linux/threads.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/regdef.h>
#include <asm/page.h>
#include <asm/mipsregs.h>
@ -82,12 +83,33 @@
*/
.macro setup_c0_status set clr
.set push
#ifdef CONFIG_MIPS_MT_SMTC
/*
* For SMTC, we need to set privilege and disable interrupts only for
* the current TC, using the TCStatus register.
*/
mfc0 t0, CP0_TCSTATUS
/* Fortunately CU 0 is in the same place in both registers */
/* Set TCU0, TMX, TKSU (for later inversion) and IXMT */
li t1, ST0_CU0 | 0x08001c00
or t0, t1
/* Clear TKSU, leave IXMT */
xori t0, 0x00001800
mtc0 t0, CP0_TCSTATUS
ehb
/* We need to leave the global IE bit set, but clear EXL...*/
mfc0 t0, CP0_STATUS
or t0, ST0_CU0 | ST0_EXL | ST0_ERL | \set | \clr
xor t0, ST0_EXL | ST0_ERL | \clr
mtc0 t0, CP0_STATUS
#else
mfc0 t0, CP0_STATUS
or t0, ST0_CU0|\set|0x1f|\clr
xor t0, 0x1f|\clr
mtc0 t0, CP0_STATUS
.set noreorder
sll zero,3 # ehb
#endif
.set pop
.endm
@ -134,6 +156,24 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
ARC64_TWIDDLE_PC
#ifdef CONFIG_MIPS_MT_SMTC
/*
* In SMTC kernel, "CLI" is thread-specific, in TCStatus.
* We still need to enable interrupts globally in Status,
* and clear EXL/ERL.
*
* TCContext is used to track interrupt levels under
* service in SMTC kernel. Clear for boot TC before
* allowing any interrupts.
*/
mtc0 zero, CP0_TCCONTEXT
mfc0 t0, CP0_STATUS
ori t0, t0, 0xff1f
xori t0, t0, 0x001e
mtc0 t0, CP0_STATUS
#endif /* CONFIG_MIPS_MT_SMTC */
PTR_LA t0, __bss_start # clear .bss
LONG_S zero, (t0)
PTR_LA t1, __bss_stop - LONGSIZE
@ -166,8 +206,25 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
* function after setting up the stack and gp registers.
*/
NESTED(smp_bootstrap, 16, sp)
#ifdef CONFIG_MIPS_MT_SMTC
/*
* Read-modify-writes of Status must be atomic, and this
* is one case where CLI is invoked without EXL being
* necessarily set. The CLI and setup_c0_status will
* in fact be redundant for all but the first TC of
* each VPE being booted.
*/
DMT 10 # dmt t2 /* t0, t1 are used by CLI and setup_c0_status() */
jal mips_ihb
#endif /* CONFIG_MIPS_MT_SMTC */
setup_c0_status_sec
smp_slave_setup
#ifdef CONFIG_MIPS_MT_SMTC
andi t2, t2, VPECONTROL_TE
beqz t2, 2f
EMT # emt
2:
#endif /* CONFIG_MIPS_MT_SMTC */
j start_secondary
END(smp_bootstrap)
#endif /* CONFIG_SMP */

4
arch/mips/kernel/i8259.c
View File

@ -187,6 +187,10 @@ handle_real_irq:
outb(cached_21,0x21);
outb(0x60+irq,0x20); /* 'Specific EOI' to master */
}
#ifdef CONFIG_MIPS_MT_SMTC
if (irq_hwmask[irq] & ST0_IM)
set_c0_status(irq_hwmask[irq] & ST0_IM);
#endif /* CONFIG_MIPS_MT_SMTC */
spin_unlock_irqrestore(&i8259A_lock, flags);
return;

9
arch/mips/kernel/irq-msc01.c
View File

@ -76,6 +76,11 @@ static void level_mask_and_ack_msc_irq(unsigned int irq)
mask_msc_irq(irq);
if (!cpu_has_veic)
MSCIC_WRITE(MSC01_IC_EOI, 0);
#ifdef CONFIG_MIPS_MT_SMTC
/* This actually needs to be a call into platform code */
if (irq_hwmask[irq] & ST0_IM)
set_c0_status(irq_hwmask[irq] & ST0_IM);
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
@ -92,6 +97,10 @@ static void edge_mask_and_ack_msc_irq(unsigned int irq)
MSCIC_WRITE(MSC01_IC_SUP+irq*8, r | ~MSC01_IC_SUP_EDGE_BIT);
MSCIC_WRITE(MSC01_IC_SUP+irq*8, r);
}
#ifdef CONFIG_MIPS_MT_SMTC
if (irq_hwmask[irq] & ST0_IM)
set_c0_status(irq_hwmask[irq] & ST0_IM);
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*

18
arch/mips/kernel/irq.c
View File

@ -38,6 +38,15 @@ void ack_bad_irq(unsigned int irq)
atomic_t irq_err_count;
#ifdef CONFIG_MIPS_MT_SMTC
/*
* SMTC Kernel needs to manipulate low-level CPU interrupt mask
* in do_IRQ. These are passed in setup_irq_smtc() and stored
* in this table.
*/
unsigned long irq_hwmask[NR_IRQS];
#endif /* CONFIG_MIPS_MT_SMTC */
#undef do_IRQ
/*
@ -49,6 +58,7 @@ asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs)
{
irq_enter();
__DO_IRQ_SMTC_HOOK();
__do_IRQ(irq, regs);
irq_exit();
@ -101,6 +111,11 @@ skip:
return 0;
}
asmlinkage void spurious_interrupt(struct pt_regs *regs)
{
atomic_inc(&irq_err_count);
}
#ifdef CONFIG_KGDB
extern void breakpoint(void);
extern void set_debug_traps(void);
@ -124,6 +139,9 @@ void __init init_IRQ(void)
irq_desc[i].depth = 1;
irq_desc[i].handler = &no_irq_type;
spin_lock_init(&irq_desc[i].lock);
#ifdef CONFIG_MIPS_MT_SMTC
irq_hwmask[i] = 0;
#endif /* CONFIG_MIPS_MT_SMTC */
}
arch_init_irq();

398
arch/mips/kernel/kspd.c Normal file
View File

@ -0,0 +1,398 @@
/*
* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/unistd.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/syscalls.h>
#include <linux/workqueue.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <asm/vpe.h>
#include <asm/rtlx.h>
#include <asm/kspd.h>
static struct workqueue_struct *workqueue = NULL;
static struct work_struct work;
extern unsigned long cpu_khz;
struct mtsp_syscall {
int cmd;
unsigned char abi;
unsigned char size;
};
struct mtsp_syscall_ret {
int retval;
int errno;
};
struct mtsp_syscall_generic {
int arg0;
int arg1;
int arg2;
int arg3;
int arg4;
int arg5;
int arg6;
};
static struct list_head kspd_notifylist;
static int sp_stopping = 0;
/* these should match with those in the SDE kit */
#define MTSP_SYSCALL_BASE 0
#define MTSP_SYSCALL_EXIT (MTSP_SYSCALL_BASE + 0)
#define MTSP_SYSCALL_OPEN (MTSP_SYSCALL_BASE + 1)
#define MTSP_SYSCALL_READ (MTSP_SYSCALL_BASE + 2)
#define MTSP_SYSCALL_WRITE (MTSP_SYSCALL_BASE + 3)
#define MTSP_SYSCALL_CLOSE (MTSP_SYSCALL_BASE + 4)
#define MTSP_SYSCALL_LSEEK32 (MTSP_SYSCALL_BASE + 5)
#define MTSP_SYSCALL_ISATTY (MTSP_SYSCALL_BASE + 6)
#define MTSP_SYSCALL_GETTIME (MTSP_SYSCALL_BASE + 7)
#define MTSP_SYSCALL_PIPEFREQ (MTSP_SYSCALL_BASE + 8)
#define MTSP_SYSCALL_GETTOD (MTSP_SYSCALL_BASE + 9)
#define MTSP_O_RDONLY 0x0000
#define MTSP_O_WRONLY 0x0001
#define MTSP_O_RDWR 0x0002
#define MTSP_O_NONBLOCK 0x0004
#define MTSP_O_APPEND 0x0008
#define MTSP_O_SHLOCK 0x0010
#define MTSP_O_EXLOCK 0x0020
#define MTSP_O_ASYNC 0x0040
#define MTSP_O_FSYNC O_SYNC
#define MTSP_O_NOFOLLOW 0x0100
#define MTSP_O_SYNC 0x0080
#define MTSP_O_CREAT 0x0200
#define MTSP_O_TRUNC 0x0400
#define MTSP_O_EXCL 0x0800
#define MTSP_O_BINARY 0x8000
#define SP_VPE 1
struct apsp_table {
int sp;
int ap;
};
/* we might want to do the mode flags too */
struct apsp_table open_flags_table[] = {
{ MTSP_O_RDWR, O_RDWR },
{ MTSP_O_WRONLY, O_WRONLY },
{ MTSP_O_CREAT, O_CREAT },
{ MTSP_O_TRUNC, O_TRUNC },
{ MTSP_O_NONBLOCK, O_NONBLOCK },
{ MTSP_O_APPEND, O_APPEND },
{ MTSP_O_NOFOLLOW, O_NOFOLLOW }
};
struct apsp_table syscall_command_table[] = {
{ MTSP_SYSCALL_OPEN, __NR_open },
{ MTSP_SYSCALL_CLOSE, __NR_close },
{ MTSP_SYSCALL_READ, __NR_read },
{ MTSP_SYSCALL_WRITE, __NR_write },
{ MTSP_SYSCALL_LSEEK32, __NR_lseek }
};
static int sp_syscall(int num, int arg0, int arg1, int arg2, int arg3)
{
register long int _num __asm__ ("$2") = num;
register long int _arg0 __asm__ ("$4") = arg0;
register long int _arg1 __asm__ ("$5") = arg1;
register long int _arg2 __asm__ ("$6") = arg2;
register long int _arg3 __asm__ ("$7") = arg3;
mm_segment_t old_fs;
old_fs = get_fs();
set_fs(KERNEL_DS);
__asm__ __volatile__ (
" syscall \n"
: "=r" (_num), "=r" (_arg3)
: "r" (_num), "r" (_arg0), "r" (_arg1), "r" (_arg2), "r" (_arg3));
set_fs(old_fs);
/* $a3 is error flag */
if (_arg3)
return -_num;
return _num;
}
static int translate_syscall_command(int cmd)
{
int i;
int ret = -1;
for (i = 0; i < ARRAY_SIZE(syscall_command_table); i++) {
if ((cmd == syscall_command_table[i].sp))
return syscall_command_table[i].ap;
}
return ret;
}
static unsigned int translate_open_flags(int flags)
{
int i;
unsigned int ret = 0;
for (i = 0; i < (sizeof(open_flags_table) / sizeof(struct apsp_table));
i++) {
if( (flags & open_flags_table[i].sp) ) {
ret |= open_flags_table[i].ap;
}
}
return ret;
}
static void sp_setfsuidgid( uid_t uid, gid_t gid)
{
current->fsuid = uid;
current->fsgid = gid;
key_fsuid_changed(current);
key_fsgid_changed(current);
}
/*
* Expects a request to be on the sysio channel. Reads it. Decides whether
* its a linux syscall and runs it, or whatever. Puts the return code back
* into the request and sends the whole thing back.
*/
void sp_work_handle_request(void)
{
struct mtsp_syscall sc;
struct mtsp_syscall_generic generic;
struct mtsp_syscall_ret ret;
struct kspd_notifications *n;
struct timeval tv;
struct timezone tz;
int cmd;
char *vcwd;
mm_segment_t old_fs;
int size;
ret.retval = -1;
if (!rtlx_read(RTLX_CHANNEL_SYSIO, &sc, sizeof(struct mtsp_syscall), 0)) {
printk(KERN_ERR "Expected request but nothing to read\n");
return;
}
size = sc.size;
if (size) {
if (!rtlx_read(RTLX_CHANNEL_SYSIO, &generic, size, 0)) {
printk(KERN_ERR "Expected request but nothing to read\n");
return;
}
}
/* Run the syscall at the priviledge of the user who loaded the
SP program */
if (vpe_getuid(SP_VPE))
sp_setfsuidgid( vpe_getuid(SP_VPE), vpe_getgid(SP_VPE));
switch (sc.cmd) {
/* needs the flags argument translating from SDE kit to
linux */
case MTSP_SYSCALL_PIPEFREQ:
ret.retval = cpu_khz * 1000;
ret.errno = 0;
break;
case MTSP_SYSCALL_GETTOD:
memset(&tz, 0, sizeof(tz));
if ((ret.retval = sp_syscall(__NR_gettimeofday, (int)&tv,
(int)&tz, 0,0)) == 0)
ret.retval = tv.tv_sec;
ret.errno = errno;
break;
case MTSP_SYSCALL_EXIT:
list_for_each_entry(n, &kspd_notifylist, list)
n->kspd_sp_exit(SP_VPE);
sp_stopping = 1;
printk(KERN_DEBUG "KSPD got exit syscall from SP exitcode %d\n",
generic.arg0);
break;
case MTSP_SYSCALL_OPEN:
generic.arg1 = translate_open_flags(generic.arg1);
vcwd = vpe_getcwd(SP_VPE);
/* change to the cwd of the process that loaded the SP program */
old_fs = get_fs();
set_fs(KERNEL_DS);
sys_chdir(vcwd);
set_fs(old_fs);
sc.cmd = __NR_open;
/* fall through */
default:
if ((sc.cmd >= __NR_Linux) &&
(sc.cmd <= (__NR_Linux + __NR_Linux_syscalls)) )
cmd = sc.cmd;
else
cmd = translate_syscall_command(sc.cmd);
if (cmd >= 0) {
ret.retval = sp_syscall(cmd, generic.arg0, generic.arg1,
generic.arg2, generic.arg3);
ret.errno = errno;
} else
printk(KERN_WARNING
"KSPD: Unknown SP syscall number %d\n", sc.cmd);
break;
} /* switch */
if (vpe_getuid(SP_VPE))
sp_setfsuidgid( 0, 0);
if ((rtlx_write(RTLX_CHANNEL_SYSIO, &ret, sizeof(struct mtsp_syscall_ret), 0))
< sizeof(struct mtsp_syscall_ret))
printk("KSPD: sp_work_handle_request failed to send to SP\n");
}
static void sp_cleanup(void)
{
struct files_struct *files = current->files;
int i, j;
struct fdtable *fdt;
j = 0;
/*
* It is safe to dereference the fd table without RCU or
* ->file_lock
*/
fdt = files_fdtable(files);
for (;;) {
unsigned long set;
i = j * __NFDBITS;
if (i >= fdt->max_fdset || i >= fdt->max_fds)
break;
set = fdt->open_fds->fds_bits[j++];
while (set) {
if (set & 1) {
struct file * file = xchg(&fdt->fd[i], NULL);
if (file)
filp_close(file, files);
}
i++;
set >>= 1;
}
}
}
static int channel_open = 0;
/* the work handler */
static void sp_work(void *data)
{
if (!channel_open) {
if( rtlx_open(RTLX_CHANNEL_SYSIO, 1) != 0) {
printk("KSPD: unable to open sp channel\n");
sp_stopping = 1;
} else {
channel_open++;
printk(KERN_DEBUG "KSPD: SP channel opened\n");
}
} else {
/* wait for some data, allow it to sleep */
rtlx_read_poll(RTLX_CHANNEL_SYSIO, 1);
/* Check we haven't been woken because we are stopping */
if (!sp_stopping)
sp_work_handle_request();
}
if (!sp_stopping)
queue_work(workqueue, &work);
else
sp_cleanup();
}
static void startwork(int vpe)
{
sp_stopping = channel_open = 0;
if (workqueue == NULL) {
if ((workqueue = create_singlethread_workqueue("kspd")) == NULL) {
printk(KERN_ERR "unable to start kspd\n");
return;
}
INIT_WORK(&work, sp_work, NULL);
queue_work(workqueue, &work);
} else
queue_work(workqueue, &work);
}
static void stopwork(int vpe)
{
sp_stopping = 1;
printk(KERN_DEBUG "KSPD: SP stopping\n");
}
void kspd_notify(struct kspd_notifications *notify)
{
list_add(&notify->list, &kspd_notifylist);
}
static struct vpe_notifications notify;
static int kspd_module_init(void)
{
INIT_LIST_HEAD(&kspd_notifylist);
notify.start = startwork;
notify.stop = stopwork;
vpe_notify(SP_VPE, &notify);
return 0;
}
static void kspd_module_exit(void)
{
}
module_init(kspd_module_init);
module_exit(kspd_module_exit);
MODULE_DESCRIPTION("MIPS KSPD");
MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc.");
MODULE_LICENSE("GPL");

10
arch/mips/kernel/linux32.c
View File

@ -1182,6 +1182,16 @@ asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
return sys_readahead(fd, merge_64(a2, a3), count);
}
asmlinkage long sys32_sync_file_range(int fd, int __pad,
unsigned long a2, unsigned long a3,
unsigned long a4, unsigned long a5,
int flags)
{
return sys_sync_file_range(fd,
merge_64(a2, a3), merge_64(a4, a5),
flags);
}
/* Argument list sizes for sys_socketcall */
#define AL(x) ((x) * sizeof(unsigned int))
static unsigned char socketcall_nargs[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),

449
arch/mips/kernel/mips-mt.c Normal file
View File

@ -0,0 +1,449 @@
/*
* General MIPS MT support routines, usable in AP/SP, SMVP, or SMTC kernels
* Copyright (C) 2005 Mips Technologies, Inc
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/hardirq.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
#include <asm/mipsmtregs.h>
#include <asm/r4kcache.h>
#include <asm/cacheflush.h>
/*
* CPU mask used to set process affinity for MT VPEs/TCs with FPUs
*/
cpumask_t mt_fpu_cpumask;
#ifdef CONFIG_MIPS_MT_FPAFF
#include <linux/cpu.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
unsigned long mt_fpemul_threshold = 0;
/*
* Replacement functions for the sys_sched_setaffinity() and
* sys_sched_getaffinity() system calls, so that we can integrate
* FPU affinity with the user's requested processor affinity.
* This code is 98% identical with the sys_sched_setaffinity()
* and sys_sched_getaffinity() system calls, and should be
* updated when kernel/sched.c changes.
*/
/*
* find_process_by_pid - find a process with a matching PID value.
* used in sys_sched_set/getaffinity() in kernel/sched.c, so
* cloned here.
*/
static inline task_t *find_process_by_pid(pid_t pid)
{
return pid ? find_task_by_pid(pid) : current;
}
/*
* mipsmt_sys_sched_setaffinity - set the cpu affinity of a process
*/
asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
unsigned long __user *user_mask_ptr)
{
cpumask_t new_mask;
cpumask_t effective_mask;
int retval;
task_t *p;
if (len < sizeof(new_mask))
return -EINVAL;
if (copy_from_user(&new_mask, user_mask_ptr, sizeof(new_mask)))
return -EFAULT;
lock_cpu_hotplug();
read_lock(&tasklist_lock);
p = find_process_by_pid(pid);
if (!p) {
read_unlock(&tasklist_lock);
unlock_cpu_hotplug();
return -ESRCH;
}
/*
* It is not safe to call set_cpus_allowed with the
* tasklist_lock held. We will bump the task_struct's
* usage count and drop tasklist_lock before invoking
* set_cpus_allowed.
*/
get_task_struct(p);
retval = -EPERM;
if ((current->euid != p->euid) && (current->euid != p->uid) &&
!capable(CAP_SYS_NICE)) {
read_unlock(&tasklist_lock);
goto out_unlock;
}
/* Record new user-specified CPU set for future reference */
p->thread.user_cpus_allowed = new_mask;
/* Unlock the task list */
read_unlock(&tasklist_lock);
/* Compute new global allowed CPU set if necessary */
if( (p->thread.mflags & MF_FPUBOUND)
&& cpus_intersects(new_mask, mt_fpu_cpumask)) {
cpus_and(effective_mask, new_mask, mt_fpu_cpumask);
retval = set_cpus_allowed(p, effective_mask);
} else {
p->thread.mflags &= ~MF_FPUBOUND;
retval = set_cpus_allowed(p, new_mask);
}
out_unlock:
put_task_struct(p);
unlock_cpu_hotplug();
return retval;
}
/*
* mipsmt_sys_sched_getaffinity - get the cpu affinity of a process
*/
asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len,
unsigned long __user *user_mask_ptr)
{
unsigned int real_len;
cpumask_t mask;
int retval;
task_t *p;
real_len = sizeof(mask);
if (len < real_len)
return -EINVAL;
lock_cpu_hotplug();
read_lock(&tasklist_lock);
retval = -ESRCH;
p = find_process_by_pid(pid);
if (!p)
goto out_unlock;
retval = 0;
cpus_and(mask, p->thread.user_cpus_allowed, cpu_possible_map);
out_unlock:
read_unlock(&tasklist_lock);
unlock_cpu_hotplug();
if (retval)
return retval;
if (copy_to_user(user_mask_ptr, &mask, real_len))
return -EFAULT;
return real_len;
}
#endif /* CONFIG_MIPS_MT_FPAFF */
/*
* Dump new MIPS MT state for the core. Does not leave TCs halted.
* Takes an argument which taken to be a pre-call MVPControl value.
*/
void mips_mt_regdump(unsigned long mvpctl)
{
unsigned long flags;
unsigned long vpflags;
unsigned long mvpconf0;
int nvpe;
int ntc;
int i;
int tc;
unsigned long haltval;
unsigned long tcstatval;
#ifdef CONFIG_MIPS_MT_SMTC
void smtc_soft_dump(void);
#endif /* CONFIG_MIPT_MT_SMTC */
local_irq_save(flags);
vpflags = dvpe();
printk("=== MIPS MT State Dump ===\n");
printk("-- Global State --\n");
printk(" MVPControl Passed: %08lx\n", mvpctl);
printk(" MVPControl Read: %08lx\n", vpflags);
printk(" MVPConf0 : %08lx\n", (mvpconf0 = read_c0_mvpconf0()));
nvpe = ((mvpconf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1;
ntc = ((mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1;
printk("-- per-VPE State --\n");
for(i = 0; i < nvpe; i++) {
for(tc = 0; tc < ntc; tc++) {
settc(tc);
if((read_tc_c0_tcbind() & TCBIND_CURVPE) == i) {
printk(" VPE %d\n", i);
printk(" VPEControl : %08lx\n", read_vpe_c0_vpecontrol());
printk(" VPEConf0 : %08lx\n", read_vpe_c0_vpeconf0());
printk(" VPE%d.Status : %08lx\n",
i, read_vpe_c0_status());
printk(" VPE%d.EPC : %08lx\n", i, read_vpe_c0_epc());
printk(" VPE%d.Cause : %08lx\n", i, read_vpe_c0_cause());
printk(" VPE%d.Config7 : %08lx\n",
i, read_vpe_c0_config7());
break; /* Next VPE */
}
}
}
printk("-- per-TC State --\n");
for(tc = 0; tc < ntc; tc++) {
settc(tc);
if(read_tc_c0_tcbind() == read_c0_tcbind()) {
/* Are we dumping ourself? */
haltval = 0; /* Then we're not halted, and mustn't be */
tcstatval = flags; /* And pre-dump TCStatus is flags */
printk(" TC %d (current TC with VPE EPC above)\n", tc);
} else {
haltval = read_tc_c0_tchalt();
write_tc_c0_tchalt(1);
tcstatval = read_tc_c0_tcstatus();
printk(" TC %d\n", tc);
}
printk(" TCStatus : %08lx\n", tcstatval);
printk(" TCBind : %08lx\n", read_tc_c0_tcbind());
printk(" TCRestart : %08lx\n", read_tc_c0_tcrestart());
printk(" TCHalt : %08lx\n", haltval);
printk(" TCContext : %08lx\n", read_tc_c0_tccontext());
if (!haltval)
write_tc_c0_tchalt(0);
}
#ifdef CONFIG_MIPS_MT_SMTC
smtc_soft_dump();
#endif /* CONFIG_MIPT_MT_SMTC */
printk("===========================\n");
evpe(vpflags);
local_irq_restore(flags);
}
static int mt_opt_norps = 0;
static int mt_opt_rpsctl = -1;
static int mt_opt_nblsu = -1;
static int mt_opt_forceconfig7 = 0;
static int mt_opt_config7 = -1;
static int __init rps_disable(char *s)
{
mt_opt_norps = 1;
return 1;
}
__setup("norps", rps_disable);
static int __init rpsctl_set(char *str)
{
get_option(&str, &mt_opt_rpsctl);
return 1;
}
__setup("rpsctl=", rpsctl_set);
static int __init nblsu_set(char *str)
{
get_option(&str, &mt_opt_nblsu);
return 1;
}
__setup("nblsu=", nblsu_set);
static int __init config7_set(char *str)
{
get_option(&str, &mt_opt_config7);
mt_opt_forceconfig7 = 1;
return 1;
}
__setup("config7=", config7_set);
/* Experimental cache flush control parameters that should go away some day */
int mt_protiflush = 0;
int mt_protdflush = 0;
int mt_n_iflushes = 1;
int mt_n_dflushes = 1;
static int __init set_protiflush(char *s)
{
mt_protiflush = 1;
return 1;
}
__setup("protiflush", set_protiflush);
static int __init set_protdflush(char *s)
{
mt_protdflush = 1;
return 1;
}
__setup("protdflush", set_protdflush);
static int __init niflush(char *s)
{
get_option(&s, &mt_n_iflushes);
return 1;
}
__setup("niflush=", niflush);
static int __init ndflush(char *s)
{
get_option(&s, &mt_n_dflushes);
return 1;
}
__setup("ndflush=", ndflush);
#ifdef CONFIG_MIPS_MT_FPAFF
static int fpaff_threshold = -1;
static int __init fpaff_thresh(char *str)
{
get_option(&str, &fpaff_threshold);
return 1;
}
__setup("fpaff=", fpaff_thresh);
#endif /* CONFIG_MIPS_MT_FPAFF */
static unsigned int itc_base = 0;
static int __init set_itc_base(char *str)
{
get_option(&str, &itc_base);
return 1;
}
__setup("itcbase=", set_itc_base);
void mips_mt_set_cpuoptions(void)
{
unsigned int oconfig7 = read_c0_config7();
unsigned int nconfig7 = oconfig7;
if (mt_opt_norps) {
printk("\"norps\" option deprectated: use \"rpsctl=\"\n");
}
if (mt_opt_rpsctl >= 0) {
printk("34K return prediction stack override set to %d.\n",
mt_opt_rpsctl);
if (mt_opt_rpsctl)
nconfig7 |= (1 << 2);
else
nconfig7 &= ~(1 << 2);
}
if (mt_opt_nblsu >= 0) {
printk("34K ALU/LSU sync override set to %d.\n", mt_opt_nblsu);
if (mt_opt_nblsu)
nconfig7 |= (1 << 5);
else
nconfig7 &= ~(1 << 5);
}
if (mt_opt_forceconfig7) {
printk("CP0.Config7 forced to 0x%08x.\n", mt_opt_config7);
nconfig7 = mt_opt_config7;
}
if (oconfig7 != nconfig7) {
__asm__ __volatile("sync");
write_c0_config7(nconfig7);
ehb ();
printk("Config7: 0x%08x\n", read_c0_config7());
}
/* Report Cache management debug options */
if (mt_protiflush)
printk("I-cache flushes single-threaded\n");
if (mt_protdflush)
printk("D-cache flushes single-threaded\n");
if (mt_n_iflushes != 1)
printk("I-Cache Flushes Repeated %d times\n", mt_n_iflushes);
if (mt_n_dflushes != 1)
printk("D-Cache Flushes Repeated %d times\n", mt_n_dflushes);
#ifdef CONFIG_MIPS_MT_FPAFF
/* FPU Use Factor empirically derived from experiments on 34K */
#define FPUSEFACTOR 333
if (fpaff_threshold >= 0) {
mt_fpemul_threshold = fpaff_threshold;
} else {
mt_fpemul_threshold =
(FPUSEFACTOR * (loops_per_jiffy/(500000/HZ))) / HZ;
}
printk("FPU Affinity set after %ld emulations\n",
mt_fpemul_threshold);
#endif /* CONFIG_MIPS_MT_FPAFF */
if (itc_base != 0) {
/*
* Configure ITC mapping. This code is very
* specific to the 34K core family, which uses
* a special mode bit ("ITC") in the ErrCtl
* register to enable access to ITC control
* registers via cache "tag" operations.
*/
unsigned long ectlval;
unsigned long itcblkgrn;
/* ErrCtl register is known as "ecc" to Linux */
ectlval = read_c0_ecc();
write_c0_ecc(ectlval | (0x1 << 26));
ehb();
#define INDEX_0 (0x80000000)
#define INDEX_8 (0x80000008)
/* Read "cache tag" for Dcache pseudo-index 8 */
cache_op(Index_Load_Tag_D, INDEX_8);
ehb();
itcblkgrn = read_c0_dtaglo();
itcblkgrn &= 0xfffe0000;
/* Set for 128 byte pitch of ITC cells */
itcblkgrn |= 0x00000c00;
/* Stage in Tag register */
write_c0_dtaglo(itcblkgrn);
ehb();
/* Write out to ITU with CACHE op */
cache_op(Index_Store_Tag_D, INDEX_8);
/* Now set base address, and turn ITC on with 0x1 bit */
write_c0_dtaglo((itc_base & 0xfffffc00) | 0x1 );
ehb();
/* Write out to ITU with CACHE op */
cache_op(Index_Store_Tag_D, INDEX_0);
write_c0_ecc(ectlval);
ehb();
printk("Mapped %ld ITC cells starting at 0x%08x\n",
((itcblkgrn & 0x7fe00000) >> 20), itc_base);
}
}
/*
* Function to protect cache flushes from concurrent execution
* depends on MP software model chosen.
*/
void mt_cflush_lockdown(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
void smtc_cflush_lockdown(void);
smtc_cflush_lockdown();
#endif /* CONFIG_MIPS_MT_SMTC */
/* FILL IN VSMP and AP/SP VERSIONS HERE */
}
void mt_cflush_release(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
void smtc_cflush_release(void);
smtc_cflush_release();
#endif /* CONFIG_MIPS_MT_SMTC */
/* FILL IN VSMP and AP/SP VERSIONS HERE */
}

15
arch/mips/kernel/mips_ksyms.c
View File

@ -28,21 +28,9 @@ extern long __strnlen_user_asm(const char *s);
/*
* String functions
*/
EXPORT_SYMBOL(memchr);
EXPORT_SYMBOL(memcmp);
EXPORT_SYMBOL(memset);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memmove);
EXPORT_SYMBOL(strcat);
EXPORT_SYMBOL(strchr);
#ifdef CONFIG_64BIT
EXPORT_SYMBOL(strncmp);
#endif
EXPORT_SYMBOL(strlen);
EXPORT_SYMBOL(strncat);
EXPORT_SYMBOL(strnlen);
EXPORT_SYMBOL(strrchr);
EXPORT_SYMBOL(strstr);
EXPORT_SYMBOL(kernel_thread);
@ -61,6 +49,3 @@ EXPORT_SYMBOL(__strnlen_user_asm);
EXPORT_SYMBOL(csum_partial);
EXPORT_SYMBOL(invalid_pte_table);
#ifdef CONFIG_GENERIC_IRQ_PROBE
EXPORT_SYMBOL(probe_irq_mask);
#endif

21
arch/mips/kernel/process.c
View File

@ -41,6 +41,10 @@
#include <asm/elf.h>
#include <asm/isadep.h>
#include <asm/inst.h>
#ifdef CONFIG_MIPS_MT_SMTC
#include <asm/mipsmtregs.h>
extern void smtc_idle_loop_hook(void);
#endif /* CONFIG_MIPS_MT_SMTC */
/*
* The idle thread. There's no useful work to be done, so just try to conserve
@ -51,9 +55,13 @@ ATTRIB_NORET void cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
while (!need_resched())
while (!need_resched()) {
#ifdef CONFIG_MIPS_MT_SMTC
smtc_idle_loop_hook();
#endif /* CONFIG_MIPS_MT_SMTC */
if (cpu_wait)
(*cpu_wait)();
}
preempt_enable_no_resched();
schedule();
preempt_disable();
@ -177,6 +185,17 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
childregs->cp0_status &= ~(ST0_CU2|ST0_CU1);
clear_tsk_thread_flag(p, TIF_USEDFPU);
#ifdef CONFIG_MIPS_MT_FPAFF
/*
* FPU affinity support is cleaner if we track the
* user-visible CPU affinity from the very beginning.
* The generic cpus_allowed mask will already have
* been copied from the parent before copy_thread
* is invoked.
*/
p->thread.user_cpus_allowed = p->cpus_allowed;
#endif /* CONFIG_MIPS_MT_FPAFF */
if (clone_flags & CLONE_SETTLS)
ti->tp_value = regs->regs[7];

14
arch/mips/kernel/ptrace.c
View File

@ -248,10 +248,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
case FPC_EIR: { /* implementation / version register */
unsigned int flags;
#ifdef CONFIG_MIPS_MT_SMTC
unsigned int irqflags;
unsigned int mtflags;
#endif /* CONFIG_MIPS_MT_SMTC */
if (!cpu_has_fpu)
break;
#ifdef CONFIG_MIPS_MT_SMTC
/* Read-modify-write of Status must be atomic */
local_irq_save(irqflags);
mtflags = dmt();
#endif /* CONFIG_MIPS_MT_SMTC */
preempt_disable();
if (cpu_has_mipsmt) {
unsigned int vpflags = dvpe();
@ -266,6 +276,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
write_c0_status(flags);
}
#ifdef CONFIG_MIPS_MT_SMTC
emt(mtflags);
local_irq_restore(irqflags);
#endif /* CONFIG_MIPS_MT_SMTC */
preempt_enable();
break;
}

14
arch/mips/kernel/ptrace32.c
View File

@ -173,12 +173,22 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
break;
case FPC_EIR: { /* implementation / version register */
unsigned int flags;
#ifdef CONFIG_MIPS_MT_SMTC
unsigned int irqflags;
unsigned int mtflags;
#endif /* CONFIG_MIPS_MT_SMTC */
if (!cpu_has_fpu) {
tmp = 0;
break;
}
#ifdef CONFIG_MIPS_MT_SMTC
/* Read-modify-write of Status must be atomic */
local_irq_save(irqflags);
mtflags = dmt();
#endif /* CONFIG_MIPS_MT_SMTC */
preempt_disable();
if (cpu_has_mipsmt) {
unsigned int vpflags = dvpe();
@ -193,6 +203,10 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
write_c0_status(flags);
}
#ifdef CONFIG_MIPS_MT_SMTC
emt(mtflags);
local_irq_restore(irqflags);
#endif /* CONFIG_MIPS_MT_SMTC */
preempt_enable();
break;
}

34
arch/mips/kernel/r4k_switch.S
View File

@ -88,7 +88,18 @@
PTR_ADDIU t0, $28, _THREAD_SIZE - 32
set_saved_sp t0, t1, t2
#ifdef CONFIG_MIPS_MT_SMTC
/* Read-modify-writes of Status must be atomic on a VPE */
mfc0 t2, CP0_TCSTATUS
ori t1, t2, TCSTATUS_IXMT
mtc0 t1, CP0_TCSTATUS
andi t2, t2, TCSTATUS_IXMT
ehb
DMT 8 # dmt t0
move t1,ra
jal mips_ihb
move ra,t1
#endif /* CONFIG_MIPS_MT_SMTC */
mfc0 t1, CP0_STATUS /* Do we really need this? */
li a3, 0xff01
and t1, a3
@ -97,6 +108,18 @@
and a2, a3
or a2, t1
mtc0 a2, CP0_STATUS
#ifdef CONFIG_MIPS_MT_SMTC
ehb
andi t0, t0, VPECONTROL_TE
beqz t0, 1f
emt
1:
mfc0 t1, CP0_TCSTATUS
xori t1, t1, TCSTATUS_IXMT
or t1, t1, t2
mtc0 t1, CP0_TCSTATUS
ehb
#endif /* CONFIG_MIPS_MT_SMTC */
move v0, a0
jr ra
END(resume)
@ -131,10 +154,19 @@ LEAF(_restore_fp)
#define FPU_DEFAULT 0x00000000
LEAF(_init_fpu)
#ifdef CONFIG_MIPS_MT_SMTC
/* Rather than manipulate per-VPE Status, set per-TC bit in TCStatus */
mfc0 t0, CP0_TCSTATUS
/* Bit position is the same for Status, TCStatus */
li t1, ST0_CU1
or t0, t1
mtc0 t0, CP0_TCSTATUS
#else /* Normal MIPS CU1 enable */
mfc0 t0, CP0_STATUS
li t1, ST0_CU1
or t0, t1
mtc0 t0, CP0_STATUS
#endif /* CONFIG_MIPS_MT_SMTC */
fpu_enable_hazard
li t1, FPU_DEFAULT

535
arch/mips/kernel/rtlx.c
View File

@ -21,45 +21,44 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/vmalloc.h>
#include <linux/elf.h>
#include <linux/seq_file.h>
#include <linux/syscalls.h>
#include <linux/moduleloader.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <asm/mipsmtregs.h>
#include <asm/bitops.h>
#include <asm/cacheflush.h>
#include <asm/atomic.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/vpe.h>
#include <asm/rtlx.h>
#include <asm/uaccess.h>
#define RTLX_TARG_VPE 1
static struct rtlx_info *rtlx;
static int major;
static char module_name[] = "rtlx";
static struct irqaction irq;
static int irq_num;
static inline int spacefree(int read, int write, int size)
{
if (read == write) {
/*
* never fill the buffer completely, so indexes are always
* equal if empty and only empty, or !equal if data available
*/
return size - 1;
}
return ((read + size - write) % size) - 1;
}
static struct chan_waitqueues {
wait_queue_head_t rt_queue;
wait_queue_head_t lx_queue;
int in_open;
} channel_wqs[RTLX_CHANNELS];
static struct irqaction irq;
static int irq_num;
static struct vpe_notifications notify;
static int sp_stopping = 0;
extern void *vpe_get_shared(int index);
static void rtlx_dispatch(struct pt_regs *regs)
@ -67,174 +66,298 @@ static void rtlx_dispatch(struct pt_regs *regs)
do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ, regs);
}
/* Interrupt handler may be called before rtlx_init has otherwise had
a chance to run.
*/
static irqreturn_t rtlx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
int i;
for (i = 0; i < RTLX_CHANNELS; i++) {
struct rtlx_channel *chan = &rtlx->channel[i];
if (chan->lx_read != chan->lx_write)
wake_up_interruptible(&channel_wqs[i].lx_queue);
wake_up(&channel_wqs[i].lx_queue);
wake_up(&channel_wqs[i].rt_queue);
}
return IRQ_HANDLED;
}
/* call when we have the address of the shared structure from the SP side. */
static int rtlx_init(struct rtlx_info *rtlxi)
static __attribute_used__ void dump_rtlx(void)
{
int i;
printk("id 0x%lx state %d\n", rtlx->id, rtlx->state);
for (i = 0; i < RTLX_CHANNELS; i++) {
struct rtlx_channel *chan = &rtlx->channel[i];
printk(" rt_state %d lx_state %d buffer_size %d\n",
chan->rt_state, chan->lx_state, chan->buffer_size);
printk(" rt_read %d rt_write %d\n",
chan->rt_read, chan->rt_write);
printk(" lx_read %d lx_write %d\n",
chan->lx_read, chan->lx_write);
printk(" rt_buffer <%s>\n", chan->rt_buffer);
printk(" lx_buffer <%s>\n", chan->lx_buffer);
}
}
/* call when we have the address of the shared structure from the SP side. */
static int rtlx_init(struct rtlx_info *rtlxi)
{
if (rtlxi->id != RTLX_ID) {
printk(KERN_WARNING "no valid RTLX id at 0x%p\n", rtlxi);
printk(KERN_ERR "no valid RTLX id at 0x%p 0x%x\n", rtlxi, rtlxi->id);
return -ENOEXEC;
}
/* initialise the wait queues */
for (i = 0; i < RTLX_CHANNELS; i++) {
init_waitqueue_head(&channel_wqs[i].rt_queue);
init_waitqueue_head(&channel_wqs[i].lx_queue);
}
/* set up for interrupt handling */
memset(&irq, 0, sizeof(struct irqaction));
if (cpu_has_vint)
set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
irq_num = MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ;
irq.handler = rtlx_interrupt;
irq.flags = SA_INTERRUPT;
irq.name = "RTLX";
irq.dev_id = rtlx;
setup_irq(irq_num, &irq);
rtlx = rtlxi;
return 0;
}
/* only allow one open process at a time to open each channel */
static int rtlx_open(struct inode *inode, struct file *filp)
/* notifications */
static void starting(int vpe)
{
int minor, ret;
struct rtlx_channel *chan;
int i;
sp_stopping = 0;
/* assume only 1 device at the mo. */
minor = MINOR(inode->i_rdev);
/* force a reload of rtlx */
rtlx=NULL;
/* wake up any sleeping rtlx_open's */
for (i = 0; i < RTLX_CHANNELS; i++)
wake_up_interruptible(&channel_wqs[i].lx_queue);
}
static void stopping(int vpe)
{
int i;
sp_stopping = 1;
for (i = 0; i < RTLX_CHANNELS; i++)
wake_up_interruptible(&channel_wqs[i].lx_queue);
}
int rtlx_open(int index, int can_sleep)
{
int ret;
struct rtlx_channel *chan;
volatile struct rtlx_info **p;
if (index >= RTLX_CHANNELS) {
printk(KERN_DEBUG "rtlx_open index out of range\n");
return -ENOSYS;
}
if (channel_wqs[index].in_open) {
printk(KERN_DEBUG "rtlx_open channel %d already opened\n", index);
return -EBUSY;
}
channel_wqs[index].in_open++;
if (rtlx == NULL) {
struct rtlx_info **p;
if( (p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
printk(KERN_ERR "vpe_get_shared is NULL. "
"Has an SP program been loaded?\n");
return -EFAULT;
if (can_sleep) {
DECLARE_WAITQUEUE(wait, current);
/* go to sleep */
add_wait_queue(&channel_wqs[index].lx_queue, &wait);
set_current_state(TASK_INTERRUPTIBLE);
while ((p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
schedule();
set_current_state(TASK_INTERRUPTIBLE);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
/* back running */
} else {
printk( KERN_DEBUG "No SP program loaded, and device "
"opened with O_NONBLOCK\n");
channel_wqs[index].in_open = 0;
return -ENOSYS;
}
}
if (*p == NULL) {
printk(KERN_ERR "vpe_shared %p %p\n", p, *p);
return -EFAULT;
if (can_sleep) {
DECLARE_WAITQUEUE(wait, current);
/* go to sleep */
add_wait_queue(&channel_wqs[index].lx_queue, &wait);
set_current_state(TASK_INTERRUPTIBLE);
while (*p == NULL) {
schedule();
/* reset task state to interruptable otherwise
we'll whizz round here like a very fast loopy
thing. schedule() appears to return with state
set to TASK_RUNNING.
If the loaded SP program, for whatever reason,
doesn't set up the shared structure *p will never
become true. So whoever connected to either /dev/rt?
or if it was kspd, will then take up rather a lot of
processor cycles.
*/
set_current_state(TASK_INTERRUPTIBLE);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
/* back running */
}
else {
printk(" *vpe_get_shared is NULL. "
"Has an SP program been loaded?\n");
channel_wqs[index].in_open = 0;
return -ENOSYS;
}
}
if ((ret = rtlx_init(*p)) < 0)
return ret;
if ((unsigned int)*p < KSEG0) {
printk(KERN_WARNING "vpe_get_shared returned an invalid pointer "
"maybe an error code %d\n", (int)*p);
channel_wqs[index].in_open = 0;
return -ENOSYS;
}
if ((ret = rtlx_init(*p)) < 0) {
channel_wqs[index].in_open = 0;
return ret;
}
}
chan = &rtlx->channel[minor];
chan = &rtlx->channel[index];
if (test_and_set_bit(RTLX_STATE_OPENED, &chan->lx_state))
return -EBUSY;
if (chan->lx_state == RTLX_STATE_OPENED) {
channel_wqs[index].in_open = 0;
return -EBUSY;
}
chan->lx_state = RTLX_STATE_OPENED;
channel_wqs[index].in_open = 0;
return 0;
}
static int rtlx_release(struct inode *inode, struct file *filp)
int rtlx_release(int index)
{
int minor = MINOR(inode->i_rdev);
clear_bit(RTLX_STATE_OPENED, &rtlx->channel[minor].lx_state);
smp_mb__after_clear_bit();
rtlx->channel[index].lx_state = RTLX_STATE_UNUSED;
return 0;
}
static unsigned int rtlx_poll(struct file *file, poll_table * wait)
unsigned int rtlx_read_poll(int index, int can_sleep)
{
int minor;
unsigned int mask = 0;
struct rtlx_channel *chan;
struct rtlx_channel *chan;
minor = MINOR(file->f_dentry->d_inode->i_rdev);
chan = &rtlx->channel[minor];
if (rtlx == NULL)
return 0;
poll_wait(file, &channel_wqs[minor].rt_queue, wait);
poll_wait(file, &channel_wqs[minor].lx_queue, wait);
chan = &rtlx->channel[index];
/* data available to read? */
if (chan->lx_read != chan->lx_write)
mask |= POLLIN | POLLRDNORM;
if (chan->lx_read == chan->lx_write) {
if (can_sleep) {
DECLARE_WAITQUEUE(wait, current);
/* space to write */
if (spacefree(chan->rt_read, chan->rt_write, chan->buffer_size))
mask |= POLLOUT | POLLWRNORM;
/* go to sleep */
add_wait_queue(&channel_wqs[index].lx_queue, &wait);
return mask;
set_current_state(TASK_INTERRUPTIBLE);
while (chan->lx_read == chan->lx_write) {
schedule();
set_current_state(TASK_INTERRUPTIBLE);
if (sp_stopping) {
set_current_state(TASK_RUNNING);
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
return 0;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
/* back running */
}
else
return 0;
}
return (chan->lx_write + chan->buffer_size - chan->lx_read)
% chan->buffer_size;
}
static ssize_t rtlx_read(struct file *file, char __user * buffer, size_t count,
loff_t * ppos)
static inline int write_spacefree(int read, int write, int size)
{
unsigned long failed;
size_t fl = 0L;
int minor;
struct rtlx_channel *lx;
DECLARE_WAITQUEUE(wait, current);
minor = MINOR(file->f_dentry->d_inode->i_rdev);
lx = &rtlx->channel[minor];
/* data available? */
if (lx->lx_write == lx->lx_read) {
if (file->f_flags & O_NONBLOCK)
return 0; /* -EAGAIN makes cat whinge */
/* go to sleep */
add_wait_queue(&channel_wqs[minor].lx_queue, &wait);
set_current_state(TASK_INTERRUPTIBLE);
while (lx->lx_write == lx->lx_read)
schedule();
set_current_state(TASK_RUNNING);
remove_wait_queue(&channel_wqs[minor].lx_queue, &wait);
/* back running */
if (read == write) {
/*
* Never fill the buffer completely, so indexes are always
* equal if empty and only empty, or !equal if data available
*/
return size - 1;
}
return ((read + size - write) % size) - 1;
}
unsigned int rtlx_write_poll(int index)
{
struct rtlx_channel *chan = &rtlx->channel[index];
return write_spacefree(chan->rt_read, chan->rt_write, chan->buffer_size);
}
static inline void copy_to(void *dst, void *src, size_t count, int user)
{
if (user)
copy_to_user(dst, src, count);
else
memcpy(dst, src, count);
}
static inline void copy_from(void *dst, void *src, size_t count, int user)
{
if (user)
copy_from_user(dst, src, count);
else
memcpy(dst, src, count);
}
ssize_t rtlx_read(int index, void *buff, size_t count, int user)
{
size_t fl = 0L;
struct rtlx_channel *lx;
if (rtlx == NULL)
return -ENOSYS;
lx = &rtlx->channel[index];
/* find out how much in total */
count = min(count,
(size_t)(lx->lx_write + lx->buffer_size - lx->lx_read) % lx->buffer_size);
(size_t)(lx->lx_write + lx->buffer_size - lx->lx_read)
% lx->buffer_size);
/* then how much from the read pointer onwards */
fl = min(count, (size_t)lx->buffer_size - lx->lx_read);
fl = min( count, (size_t)lx->buffer_size - lx->lx_read);
failed = copy_to_user (buffer, &lx->lx_buffer[lx->lx_read], fl);
if (failed) {
count = fl - failed;
goto out;
}
copy_to(buff, &lx->lx_buffer[lx->lx_read], fl, user);
/* and if there is anything left at the beginning of the buffer */
if (count - fl) {
failed = copy_to_user (buffer + fl, lx->lx_buffer, count - fl);
if (failed) {
count -= failed;
goto out;
}
}
if ( count - fl )
copy_to (buff + fl, lx->lx_buffer, count - fl, user);
out:
/* update the index */
lx->lx_read += count;
lx->lx_read %= lx->buffer_size;
@ -242,20 +365,101 @@ out:
return count;
}
static ssize_t rtlx_write(struct file *file, const char __user * buffer,
size_t count, loff_t * ppos)
ssize_t rtlx_write(int index, void *buffer, size_t count, int user)
{
unsigned long failed;
int minor;
struct rtlx_channel *rt;
size_t fl;
if (rtlx == NULL)
return(-ENOSYS);
rt = &rtlx->channel[index];
/* total number of bytes to copy */
count = min(count,
(size_t)write_spacefree(rt->rt_read, rt->rt_write,
rt->buffer_size));
/* first bit from write pointer to the end of the buffer, or count */
fl = min(count, (size_t) rt->buffer_size - rt->rt_write);
copy_from (&rt->rt_buffer[rt->rt_write], buffer, fl, user);
/* if there's any left copy to the beginning of the buffer */
if( count - fl )
copy_from (rt->rt_buffer, buffer + fl, count - fl, user);
rt->rt_write += count;
rt->rt_write %= rt->buffer_size;
return(count);
}
static int file_open(struct inode *inode, struct file *filp)
{
int minor = MINOR(inode->i_rdev);
return rtlx_open(minor, (filp->f_flags & O_NONBLOCK) ? 0 : 1);
}
static int file_release(struct inode *inode, struct file *filp)
{
int minor;
minor = MINOR(inode->i_rdev);
return rtlx_release(minor);
}
static unsigned int file_poll(struct file *file, poll_table * wait)
{
int minor;
unsigned int mask = 0;
minor = MINOR(file->f_dentry->d_inode->i_rdev);
poll_wait(file, &channel_wqs[minor].rt_queue, wait);
poll_wait(file, &channel_wqs[minor].lx_queue, wait);
if (rtlx == NULL)
return 0;
/* data available to read? */
if (rtlx_read_poll(minor, 0))
mask |= POLLIN | POLLRDNORM;
/* space to write */
if (rtlx_write_poll(minor))
mask |= POLLOUT | POLLWRNORM;
return mask;
}
static ssize_t file_read(struct file *file, char __user * buffer, size_t count,
loff_t * ppos)
{
int minor = MINOR(file->f_dentry->d_inode->i_rdev);
/* data available? */
if (!rtlx_read_poll(minor, (file->f_flags & O_NONBLOCK) ? 0 : 1)) {
return 0; // -EAGAIN makes cat whinge
}
return rtlx_read(minor, buffer, count, 1);
}
static ssize_t file_write(struct file *file, const char __user * buffer,
size_t count, loff_t * ppos)
{
int minor;
struct rtlx_channel *rt;
DECLARE_WAITQUEUE(wait, current);
minor = MINOR(file->f_dentry->d_inode->i_rdev);
rt = &rtlx->channel[minor];
/* any space left... */
if (!spacefree(rt->rt_read, rt->rt_write, rt->buffer_size)) {
if (!rtlx_write_poll(minor)) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
@ -263,61 +467,64 @@ static ssize_t rtlx_write(struct file *file, const char __user * buffer,
add_wait_queue(&channel_wqs[minor].rt_queue, &wait);
set_current_state(TASK_INTERRUPTIBLE);
while (!spacefree(rt->rt_read, rt->rt_write, rt->buffer_size))
while (!rtlx_write_poll(minor))
schedule();
set_current_state(TASK_RUNNING);
remove_wait_queue(&channel_wqs[minor].rt_queue, &wait);
}
/* total number of bytes to copy */
count = min(count, (size_t)spacefree(rt->rt_read, rt->rt_write, rt->buffer_size) );
/* first bit from write pointer to the end of the buffer, or count */
fl = min(count, (size_t) rt->buffer_size - rt->rt_write);
failed = copy_from_user(&rt->rt_buffer[rt->rt_write], buffer, fl);
if (failed) {
count = fl - failed;
goto out;
}
/* if there's any left copy to the beginning of the buffer */
if (count - fl) {
failed = copy_from_user(rt->rt_buffer, buffer + fl, count - fl);
if (failed) {
count -= failed;
goto out;
}
}
out:
rt->rt_write += count;
rt->rt_write %= rt->buffer_size;
return count;
return rtlx_write(minor, (void *)buffer, count, 1);
}
static struct file_operations rtlx_fops = {
.owner = THIS_MODULE,
.open = rtlx_open,
.release = rtlx_release,
.write = rtlx_write,
.read = rtlx_read,
.poll = rtlx_poll
.owner = THIS_MODULE,
.open = file_open,
.release = file_release,
.write = file_write,
.read = file_read,
.poll = file_poll
};
static struct irqaction rtlx_irq = {
.handler = rtlx_interrupt,
.flags = SA_INTERRUPT,
.name = "RTLX",
};
static int rtlx_irq_num = MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ;
static char register_chrdev_failed[] __initdata =
KERN_ERR "rtlx_module_init: unable to register device\n";
static int __init rtlx_module_init(void)
static int rtlx_module_init(void)
{
int i;
major = register_chrdev(0, module_name, &rtlx_fops);
if (major < 0) {
printk(register_chrdev_failed);
return major;
}
/* initialise the wait queues */
for (i = 0; i < RTLX_CHANNELS; i++) {
init_waitqueue_head(&channel_wqs[i].rt_queue);
init_waitqueue_head(&channel_wqs[i].lx_queue);
channel_wqs[i].in_open = 0;
}
/* set up notifiers */
notify.start = starting;
notify.stop = stopping;
vpe_notify(RTLX_TARG_VPE, &notify);
if (cpu_has_vint)
set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
rtlx_irq.dev_id = rtlx;
setup_irq(rtlx_irq_num, &rtlx_irq);
return 0;
}
@ -330,5 +537,5 @@ module_init(rtlx_module_init);
module_exit(rtlx_module_exit);
MODULE_DESCRIPTION("MIPS RTLX");
MODULE_AUTHOR("Elizabeth Clarke, MIPS Technologies, Inc.");
MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc.");
MODULE_LICENSE("GPL");

13
arch/mips/kernel/scall32-o32.S
View File

@ -569,8 +569,19 @@ einval: li v0, -EINVAL
sys sys_tkill 2
sys sys_sendfile64 5
sys sys_futex 6
#ifdef CONFIG_MIPS_MT_FPAFF
/*
* For FPU affinity scheduling on MIPS MT processors, we need to
* intercept sys_sched_xxxaffinity() calls until we get a proper hook
* in kernel/sched.c. Considered only temporary we only support these
* hooks for the 32-bit kernel - there is no MIPS64 MT processor atm.
*/
sys mipsmt_sys_sched_setaffinity 3
sys mipsmt_sys_sched_getaffinity 3
#else
sys sys_sched_setaffinity 3
sys sys_sched_getaffinity 3 /* 4240 */
#endif /* CONFIG_MIPS_MT_FPAFF */
sys sys_io_setup 2
sys sys_io_destroy 1
sys sys_io_getevents 5
@ -634,6 +645,8 @@ einval: li v0, -EINVAL
sys sys_pselect6 6
sys sys_ppoll 5
sys sys_unshare 1
sys sys_splice 4
sys sys_sync_file_range 7 /* 4305 */
.endm
/* We pre-compute the number of _instruction_ bytes needed to

2
arch/mips/kernel/scall64-64.S
View File

@ -460,3 +460,5 @@ sys_call_table:
PTR sys_pselect6 /* 5260 */
PTR sys_ppoll
PTR sys_unshare
PTR sys_splice
PTR sys_sync_file_range

2
arch/mips/kernel/scall64-n32.S
View File

@ -386,3 +386,5 @@ EXPORT(sysn32_call_table)
PTR sys_pselect6
PTR sys_ppoll /* 6265 */
PTR sys_unshare
PTR sys_splice
PTR sys_sync_file_range

2
arch/mips/kernel/scall64-o32.S
View File

@ -508,4 +508,6 @@ sys_call_table:
PTR sys_pselect6
PTR sys_ppoll
PTR sys_unshare
PTR sys_splice
PTR sys32_sync_file_range /* 4305 */
.size sys_call_table,.-sys_call_table

5
arch/mips/kernel/setup.c
View File

@ -529,7 +529,10 @@ void __init setup_arch(char **cmdline_p)
int __init fpu_disable(char *s)
{
cpu_data[0].options &= ~MIPS_CPU_FPU;
int i;
for (i = 0; i < NR_CPUS; i++)
cpu_data[i].options &= ~MIPS_CPU_FPU;
return 1;
}

44
arch/mips/kernel/smp_mt.c → arch/mips/kernel/smp-mt.c
View File

@ -1,8 +1,4 @@
/*
* Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved.
*
* Elizabeth Clarke (beth@mips.com)
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
@ -16,6 +12,10 @@
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Copyright (C) 2004, 05, 06 MIPS Technologies, Inc.
* Elizabeth Clarke (beth@mips.com)
* Ralf Baechle (ralf@linux-mips.org)
* Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org)
*/
#include <linux/kernel.h>
#include <linux/sched.h>
@ -24,6 +24,7 @@
#include <linux/compiler.h>
#include <asm/atomic.h>
#include <asm/cacheflush.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/system.h>
@ -33,8 +34,8 @@
#include <asm/time.h>
#include <asm/mipsregs.h>
#include <asm/mipsmtregs.h>
#include <asm/cacheflush.h>
#include <asm/mips-boards/maltaint.h>
#include <asm/mips_mt.h>
#include <asm/mips-boards/maltaint.h> /* This is f*cking wrong */
#define MIPS_CPU_IPI_RESCHED_IRQ 0
#define MIPS_CPU_IPI_CALL_IRQ 1
@ -66,6 +67,7 @@ void __init sanitize_tlb_entries(void)
if (!cpu_has_mipsmt)
return;
/* Enable VPC */
set_c0_mvpcontrol(MVPCONTROL_VPC);
back_to_back_c0_hazard();
@ -106,12 +108,12 @@ void __init sanitize_tlb_entries(void)
static void ipi_resched_dispatch (struct pt_regs *regs)
{
do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ, regs);
do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_IPI_RESCHED_IRQ, regs);
}
static void ipi_call_dispatch (struct pt_regs *regs)
{
do_IRQ(MIPS_CPU_IPI_CALL_IRQ, regs);
do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_IPI_CALL_IRQ, regs);
}
irqreturn_t ipi_resched_interrupt(int irq, void *dev_id, struct pt_regs *regs)
@ -148,6 +150,11 @@ void plat_smp_setup(void)
unsigned long val;
int i, num;
#ifdef CONFIG_MIPS_MT_FPAFF
/* If we have an FPU, enroll ourselves in the FPU-full mask */
if (cpu_has_fpu)
cpu_set(0, mt_fpu_cpumask);
#endif /* CONFIG_MIPS_MT_FPAFF */
if (!cpu_has_mipsmt)
return;
@ -155,6 +162,8 @@ void plat_smp_setup(void)
dvpe();
dmt();
mips_mt_set_cpuoptions();
/* Put MVPE's into 'configuration state' */
set_c0_mvpcontrol(MVPCONTROL_VPC);
@ -189,11 +198,13 @@ void plat_smp_setup(void)
if (i != 0) {
write_vpe_c0_status((read_c0_status() & ~(ST0_IM | ST0_IE | ST0_KSU)) | ST0_CU0);
write_vpe_c0_cause(read_vpe_c0_cause() & ~CAUSEF_IP);
/* set config to be the same as vpe0, particularly kseg0 coherency alg */
write_vpe_c0_config( read_c0_config());
/* make sure there are no software interrupts pending */
write_vpe_c0_cause(read_vpe_c0_cause() & ~(C_SW1|C_SW0));
/* Propagate Config7 */
write_vpe_c0_config7(read_c0_config7());
}
@ -233,16 +244,16 @@ void plat_smp_setup(void)
/* We'll wait until starting the secondaries before starting MVPE */
printk(KERN_INFO "Detected %i available secondary CPU(s)\n", num);
}
void __init plat_prepare_cpus(unsigned int max_cpus)
{
/* set up ipi interrupts */
if (cpu_has_vint) {
set_vi_handler (MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
set_vi_handler (MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
}
}
void __init plat_prepare_cpus(unsigned int max_cpus)
{
cpu_ipi_resched_irq = MIPSCPU_INT_BASE + MIPS_CPU_IPI_RESCHED_IRQ;
cpu_ipi_call_irq = MIPSCPU_INT_BASE + MIPS_CPU_IPI_CALL_IRQ;
@ -287,7 +298,8 @@ void prom_boot_secondary(int cpu, struct task_struct *idle)
/* global pointer */
write_tc_gpr_gp((unsigned long)gp);
flush_icache_range((unsigned long)gp, (unsigned long)(gp + 1));
flush_icache_range((unsigned long)gp,
(unsigned long)(gp + sizeof(struct thread_info)));
/* finally out of configuration and into chaos */
clear_c0_mvpcontrol(MVPCONTROL_VPC);
@ -305,6 +317,12 @@ void prom_smp_finish(void)
{
write_c0_compare(read_c0_count() + (8* mips_hpt_frequency/HZ));
#ifdef CONFIG_MIPS_MT_FPAFF
/* If we have an FPU, enroll ourselves in the FPU-full mask */
if (cpu_has_fpu)
cpu_set(smp_processor_id(), mt_fpu_cpumask);
#endif /* CONFIG_MIPS_MT_FPAFF */
local_irq_enable();
}

12
arch/mips/kernel/smp.c
View File

@ -38,6 +38,10 @@
#include <asm/mmu_context.h>
#include <asm/smp.h>
#ifdef CONFIG_MIPS_MT_SMTC
#include <asm/mipsmtregs.h>
#endif /* CONFIG_MIPS_MT_SMTC */
cpumask_t phys_cpu_present_map; /* Bitmask of available CPUs */
volatile cpumask_t cpu_callin_map; /* Bitmask of started secondaries */
cpumask_t cpu_online_map; /* Bitmask of currently online CPUs */
@ -85,6 +89,10 @@ asmlinkage void start_secondary(void)
{
unsigned int cpu;
#ifdef CONFIG_MIPS_MT_SMTC
/* Only do cpu_probe for first TC of CPU */
if ((read_c0_tcbind() & TCBIND_CURTC) == 0)
#endif /* CONFIG_MIPS_MT_SMTC */
cpu_probe();
cpu_report();
per_cpu_trap_init();
@ -179,11 +187,13 @@ int smp_call_function (void (*func) (void *info), void *info, int retry,
if (wait)
while (atomic_read(&data.finished) != cpus)
barrier();
call_data = NULL;
spin_unlock(&smp_call_lock);
return 0;
}
void smp_call_function_interrupt(void)
{
void (*func) (void *info) = call_data->func;
@ -446,5 +456,3 @@ subsys_initcall(topology_init);
EXPORT_SYMBOL(flush_tlb_page);
EXPORT_SYMBOL(flush_tlb_one);
EXPORT_SYMBOL(cpu_data);
EXPORT_SYMBOL(synchronize_irq);

130
arch/mips/kernel/smtc-asm.S Normal file
View File

@ -0,0 +1,130 @@
/*
* Assembly Language Functions for MIPS MT SMTC support
*/
/*
* This file should be built into the kernel only if CONFIG_MIPS_MT_SMTC is set. */
#include <asm/regdef.h>
#include <asm/asmmacro.h>
#include <asm/stackframe.h>
#include <asm/stackframe.h>
/*
* "Software Interrupt" linkage.
*
* This is invoked when an "Interrupt" is sent from one TC to another,
* where the TC to be interrupted is halted, has it's Restart address
* and Status values saved by the "remote control" thread, then modified
* to cause execution to begin here, in kenel mode. This code then
* disguises the TC state as that of an exception and transfers
* control to the general exception or vectored interrupt handler.
*/
.set noreorder
/*
The __smtc_ipi_vector would use k0 and k1 as temporaries and
1) Set EXL (this is per-VPE, so this can't be done by proxy!)
2) Restore the K/CU and IXMT bits to the pre "exception" state
(EXL means no interrupts and access to the kernel map).
3) Set EPC to be the saved value of TCRestart.
4) Jump to the exception handler entry point passed by the sender.
CAN WE PROVE THAT WE WON'T DO THIS IF INTS DISABLED??
*/
/*
* Reviled and slandered vision: Set EXL and restore K/CU/IXMT
* state of pre-halt thread, then save everything and call
* thought some function pointer to imaginary_exception, which
* will parse a register value or memory message queue to
* deliver things like interprocessor interrupts. On return
* from that function, jump to the global ret_from_irq code
* to invoke the scheduler and return as appropriate.
*/
#define PT_PADSLOT4 (PT_R0-8)
#define PT_PADSLOT5 (PT_R0-4)
.text
.align 5
FEXPORT(__smtc_ipi_vector)
.set noat
/* Disable thread scheduling to make Status update atomic */
DMT 27 # dmt k1
ehb
/* Set EXL */
mfc0 k0,CP0_STATUS
ori k0,k0,ST0_EXL
mtc0 k0,CP0_STATUS
ehb
/* Thread scheduling now inhibited by EXL. Restore TE state. */
andi k1,k1,VPECONTROL_TE
beqz k1,1f
emt
1:
/*
* The IPI sender has put some information on the anticipated
* kernel stack frame. If we were in user mode, this will be
* built above the saved kernel SP. If we were already in the
* kernel, it will be built above the current CPU SP.
*
* Were we in kernel mode, as indicated by CU0?
*/
sll k1,k0,3
.set noreorder
bltz k1,2f
move k1,sp
.set reorder
/*
* If previously in user mode, set CU0 and use kernel stack.
*/
li k1,ST0_CU0
or k1,k1,k0
mtc0 k1,CP0_STATUS
ehb
get_saved_sp
/* Interrupting TC will have pre-set values in slots in the new frame */
2: subu k1,k1,PT_SIZE
/* Load TCStatus Value */
lw k0,PT_TCSTATUS(k1)
/* Write it to TCStatus to restore CU/KSU/IXMT state */
mtc0 k0,$2,1
ehb
lw k0,PT_EPC(k1)
mtc0 k0,CP0_EPC
/* Save all will redundantly recompute the SP, but use it for now */
SAVE_ALL
CLI
move a0,sp
/* Function to be invoked passed stack pad slot 5 */
lw t0,PT_PADSLOT5(sp)
/* Argument from sender passed in stack pad slot 4 */
lw a1,PT_PADSLOT4(sp)
jalr t0
nop
j ret_from_irq
nop
/*
* Called from idle loop to provoke processing of queued IPIs
* First IPI message in queue passed as argument.
*/
LEAF(self_ipi)
/* Before anything else, block interrupts */
mfc0 t0,CP0_TCSTATUS
ori t1,t0,TCSTATUS_IXMT
mtc0 t1,CP0_TCSTATUS
ehb
/* We know we're in kernel mode, so prepare stack frame */
subu t1,sp,PT_SIZE
sw ra,PT_EPC(t1)
sw a0,PT_PADSLOT4(t1)
la t2,ipi_decode
sw t2,PT_PADSLOT5(t1)
/* Save pre-disable value of TCStatus */
sw t0,PT_TCSTATUS(t1)
j __smtc_ipi_vector
nop
END(self_ipi)

93
arch/mips/kernel/smtc-proc.c Normal file
View File

@ -0,0 +1,93 @@
/*
* /proc hooks for SMTC kernel
* Copyright (C) 2005 Mips Technologies, Inc
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/hardirq.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
#include <asm/mipsregs.h>
#include <asm/cacheflush.h>
#include <linux/proc_fs.h>
#include <asm/smtc_proc.h>
/*
* /proc diagnostic and statistics hooks
*/
/*
* Statistics gathered
*/
unsigned long selfipis[NR_CPUS];
struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
static struct proc_dir_entry *smtc_stats;
atomic_t smtc_fpu_recoveries;
static int proc_read_smtc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int totalen = 0;
int len;
int i;
extern unsigned long ebase;
len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status);
totalen += len;
page += len;
len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7());
totalen += len;
page += len;
len = sprintf(page, "EBASE: 0x%08lx\n", ebase);
totalen += len;
page += len;
len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n");
totalen += len;
page += len;
for (i=0; i < NR_CPUS; i++) {
len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
totalen += len;
page += len;
}
len = sprintf(page, "Self-IPIs by CPU:\n");
totalen += len;
page += len;
for(i = 0; i < NR_CPUS; i++) {
len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
totalen += len;
page += len;
}
len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n",
atomic_read(&smtc_fpu_recoveries));
totalen += len;
page += len;
return totalen;
}
void init_smtc_stats(void)
{
int i;
for (i=0; i<NR_CPUS; i++) {
smtc_cpu_stats[i].timerints = 0;
smtc_cpu_stats[i].selfipis = 0;
}
atomic_set(&smtc_fpu_recoveries, 0);
smtc_stats = create_proc_read_entry("smtc", 0444, NULL,
proc_read_smtc, NULL);
}

1322
arch/mips/kernel/smtc.c Normal file
View File

File diff suppressed because it is too large Load Diff

3
arch/mips/kernel/time.c
View File

@ -116,8 +116,7 @@ static void c0_timer_ack(void)
write_c0_compare(expirelo);
/* Check to see if we have missed any timer interrupts. */
count = read_c0_count();
if ((count - expirelo) < 0x7fffffff) {
while (((count = read_c0_count()) - expirelo) < 0x7fffffff) {
/* missed_timer_count++; */
expirelo = count + cycles_per_jiffy;
write_c0_compare(expirelo);

212
arch/mips/kernel/traps.c
View File

@ -42,6 +42,7 @@
#include <asm/watch.h>
#include <asm/types.h>
extern asmlinkage void handle_int(void);
extern asmlinkage void handle_tlbm(void);
extern asmlinkage void handle_tlbl(void);
extern asmlinkage void handle_tlbs(void);
@ -279,9 +280,16 @@ static DEFINE_SPINLOCK(die_lock);
NORET_TYPE void ATTRIB_NORET die(const char * str, struct pt_regs * regs)
{
static int die_counter;
#ifdef CONFIG_MIPS_MT_SMTC
unsigned long dvpret = dvpe();
#endif /* CONFIG_MIPS_MT_SMTC */
console_verbose();
spin_lock_irq(&die_lock);
bust_spinlocks(1);
#ifdef CONFIG_MIPS_MT_SMTC
mips_mt_regdump(dvpret);
#endif /* CONFIG_MIPS_MT_SMTC */
printk("%s[#%d]:\n", str, ++die_counter);
show_registers(regs);
spin_unlock_irq(&die_lock);
@ -750,12 +758,43 @@ asmlinkage void do_cpu(struct pt_regs *regs)
&current->thread.fpu.soft);
if (sig)
force_sig(sig, current);
#ifdef CONFIG_MIPS_MT_FPAFF
else {
/*
* MIPS MT processors may have fewer FPU contexts
* than CPU threads. If we've emulated more than
* some threshold number of instructions, force
* migration to a "CPU" that has FP support.
*/
if(mt_fpemul_threshold > 0
&& ((current->thread.emulated_fp++
> mt_fpemul_threshold))) {
/*
* If there's no FPU present, or if the
* application has already restricted
* the allowed set to exclude any CPUs
* with FPUs, we'll skip the procedure.
*/
if (cpus_intersects(current->cpus_allowed,
mt_fpu_cpumask)) {
cpumask_t tmask;
cpus_and(tmask,
current->thread.user_cpus_allowed,
mt_fpu_cpumask);
set_cpus_allowed(current, tmask);
current->thread.mflags |= MF_FPUBOUND;
}
}
}
#endif /* CONFIG_MIPS_MT_FPAFF */
}
return;
case 2:
case 3:
die_if_kernel("do_cpu invoked from kernel context!", regs);
break;
}
@ -793,6 +832,36 @@ asmlinkage void do_mcheck(struct pt_regs *regs)
asmlinkage void do_mt(struct pt_regs *regs)
{
int subcode;
die_if_kernel("MIPS MT Thread exception in kernel", regs);
subcode = (read_vpe_c0_vpecontrol() & VPECONTROL_EXCPT)
>> VPECONTROL_EXCPT_SHIFT;
switch (subcode) {
case 0:
printk(KERN_ERR "Thread Underflow\n");
break;
case 1:
printk(KERN_ERR "Thread Overflow\n");
break;
case 2:
printk(KERN_ERR "Invalid YIELD Qualifier\n");
break;
case 3:
printk(KERN_ERR "Gating Storage Exception\n");
break;
case 4:
printk(KERN_ERR "YIELD Scheduler Exception\n");
break;
case 5:
printk(KERN_ERR "Gating Storage Schedulier Exception\n");
break;
default:
printk(KERN_ERR "*** UNKNOWN THREAD EXCEPTION %d ***\n",
subcode);
break;
}
die_if_kernel("MIPS MT Thread exception in kernel", regs);
force_sig(SIGILL, current);
@ -928,7 +997,15 @@ void ejtag_exception_handler(struct pt_regs *regs)
*/
void nmi_exception_handler(struct pt_regs *regs)
{
#ifdef CONFIG_MIPS_MT_SMTC
unsigned long dvpret = dvpe();
bust_spinlocks(1);
printk("NMI taken!!!!\n");
mips_mt_regdump(dvpret);
#else
bust_spinlocks(1);
printk("NMI taken!!!!\n");
#endif /* CONFIG_MIPS_MT_SMTC */
die("NMI", regs);
while(1) ;
}
@ -960,27 +1037,29 @@ void *set_except_vector(int n, void *addr)
#ifdef CONFIG_CPU_MIPSR2
/*
* Shadow register allocation
* MIPSR2 shadow register set allocation
* FIXME: SMP...
*/
/* MIPSR2 shadow register sets */
struct shadow_registers {
spinlock_t sr_lock; /* */
int sr_supported; /* Number of shadow register sets supported */
int sr_allocated; /* Bitmap of allocated shadow registers */
static struct shadow_registers {
/*
* Number of shadow register sets supported
*/
unsigned long sr_supported;
/*
* Bitmap of allocated shadow registers
*/
unsigned long sr_allocated;
} shadow_registers;
void mips_srs_init(void)
static void mips_srs_init(void)
{
#ifdef CONFIG_CPU_MIPSR2_SRS
shadow_registers.sr_supported = ((read_c0_srsctl() >> 26) & 0x0f) + 1;
printk ("%d MIPSR2 register sets available\n", shadow_registers.sr_supported);
#else
shadow_registers.sr_supported = 1;
printk(KERN_INFO "%d MIPSR2 register sets available\n",
shadow_registers.sr_supported);
#endif
shadow_registers.sr_allocated = 1; /* Set 0 used by kernel */
spin_lock_init(&shadow_registers.sr_lock);
}
int mips_srs_max(void)
@ -988,38 +1067,30 @@ int mips_srs_max(void)
return shadow_registers.sr_supported;
}
int mips_srs_alloc (void)
int mips_srs_alloc(void)
{
struct shadow_registers *sr = &shadow_registers;
unsigned long flags;
int set;
spin_lock_irqsave(&sr->sr_lock, flags);
again:
set = find_first_zero_bit(&sr->sr_allocated, sr->sr_supported);
if (set >= sr->sr_supported)
return -1;
for (set = 0; set < sr->sr_supported; set++) {
if ((sr->sr_allocated & (1 << set)) == 0) {
sr->sr_allocated |= 1 << set;
spin_unlock_irqrestore(&sr->sr_lock, flags);
return set;
}
}
if (test_and_set_bit(set, &sr->sr_allocated))
goto again;
/* None available */
spin_unlock_irqrestore(&sr->sr_lock, flags);
return -1;
return set;
}
void mips_srs_free (int set)
void mips_srs_free(int set)
{
struct shadow_registers *sr = &shadow_registers;
unsigned long flags;
spin_lock_irqsave(&sr->sr_lock, flags);
sr->sr_allocated &= ~(1 << set);
spin_unlock_irqrestore(&sr->sr_lock, flags);
clear_bit(set, &sr->sr_allocated);
}
void *set_vi_srs_handler (int n, void *addr, int srs)
static void *set_vi_srs_handler(int n, void *addr, int srs)
{
unsigned long handler;
unsigned long old_handler = vi_handlers[n];
@ -1032,8 +1103,7 @@ void *set_vi_srs_handler (int n, void *addr, int srs)
if (addr == NULL) {
handler = (unsigned long) do_default_vi;
srs = 0;
}
else
} else
handler = (unsigned long) addr;
vi_handlers[n] = (unsigned long) addr;
@ -1045,8 +1115,7 @@ void *set_vi_srs_handler (int n, void *addr, int srs)
if (cpu_has_veic) {
if (board_bind_eic_interrupt)
board_bind_eic_interrupt (n, srs);
}
else if (cpu_has_vint) {
} else if (cpu_has_vint) {
/* SRSMap is only defined if shadow sets are implemented */
if (mips_srs_max() > 1)
change_c0_srsmap (0xf << n*4, srs << n*4);
@ -1060,6 +1129,15 @@ void *set_vi_srs_handler (int n, void *addr, int srs)
extern char except_vec_vi, except_vec_vi_lui;
extern char except_vec_vi_ori, except_vec_vi_end;
#ifdef CONFIG_MIPS_MT_SMTC
/*
* We need to provide the SMTC vectored interrupt handler
* not only with the address of the handler, but with the
* Status.IM bit to be masked before going there.
*/
extern char except_vec_vi_mori;
const int mori_offset = &except_vec_vi_mori - &except_vec_vi;
#endif /* CONFIG_MIPS_MT_SMTC */
const int handler_len = &except_vec_vi_end - &except_vec_vi;
const int lui_offset = &except_vec_vi_lui - &except_vec_vi;
const int ori_offset = &except_vec_vi_ori - &except_vec_vi;
@ -1073,6 +1151,12 @@ void *set_vi_srs_handler (int n, void *addr, int srs)
}
memcpy (b, &except_vec_vi, handler_len);
#ifdef CONFIG_MIPS_MT_SMTC
if (n > 7)
printk("Vector index %d exceeds SMTC maximum\n", n);
w = (u32 *)(b + mori_offset);
*w = (*w & 0xffff0000) | (0x100 << n);
#endif /* CONFIG_MIPS_MT_SMTC */
w = (u32 *)(b + lui_offset);
*w = (*w & 0xffff0000) | (((u32)handler >> 16) & 0xffff);
w = (u32 *)(b + ori_offset);
@ -1095,9 +1179,9 @@ void *set_vi_srs_handler (int n, void *addr, int srs)
return (void *)old_handler;
}
void *set_vi_handler (int n, void *addr)
void *set_vi_handler(int n, void *addr)
{
return set_vi_srs_handler (n, addr, 0);
return set_vi_srs_handler(n, addr, 0);
}
#endif
@ -1113,8 +1197,29 @@ extern asmlinkage int _restore_fp_context(struct sigcontext *sc);
extern asmlinkage int fpu_emulator_save_context(struct sigcontext *sc);
extern asmlinkage int fpu_emulator_restore_context(struct sigcontext *sc);
#ifdef CONFIG_SMP
static int smp_save_fp_context(struct sigcontext *sc)
{
return cpu_has_fpu
? _save_fp_context(sc)
: fpu_emulator_save_context(sc);
}
static int smp_restore_fp_context(struct sigcontext *sc)
{
return cpu_has_fpu
? _restore_fp_context(sc)
: fpu_emulator_restore_context(sc);
}
#endif
static inline void signal_init(void)
{
#ifdef CONFIG_SMP
/* For now just do the cpu_has_fpu check when the functions are invoked */
save_fp_context = smp_save_fp_context;
restore_fp_context = smp_restore_fp_context;
#else
if (cpu_has_fpu) {
save_fp_context = _save_fp_context;
restore_fp_context = _restore_fp_context;
@ -1122,6 +1227,7 @@ static inline void signal_init(void)
save_fp_context = fpu_emulator_save_context;
restore_fp_context = fpu_emulator_restore_context;
}
#endif
}
#ifdef CONFIG_MIPS32_COMPAT
@ -1158,6 +1264,20 @@ void __init per_cpu_trap_init(void)
{
unsigned int cpu = smp_processor_id();
unsigned int status_set = ST0_CU0;
#ifdef CONFIG_MIPS_MT_SMTC
int secondaryTC = 0;
int bootTC = (cpu == 0);
/*
* Only do per_cpu_trap_init() for first TC of Each VPE.
* Note that this hack assumes that the SMTC init code
* assigns TCs consecutively and in ascending order.
*/
if (((read_c0_tcbind() & TCBIND_CURTC) != 0) &&
((read_c0_tcbind() & TCBIND_CURVPE) == cpu_data[cpu - 1].vpe_id))
secondaryTC = 1;
#endif /* CONFIG_MIPS_MT_SMTC */
/*
* Disable coprocessors and select 32-bit or 64-bit addressing
@ -1180,6 +1300,10 @@ void __init per_cpu_trap_init(void)
write_c0_hwrena (0x0000000f); /* Allow rdhwr to all registers */
#endif
#ifdef CONFIG_MIPS_MT_SMTC
if (!secondaryTC) {
#endif /* CONFIG_MIPS_MT_SMTC */
/*
* Interrupt handling.
*/
@ -1196,6 +1320,9 @@ void __init per_cpu_trap_init(void)
} else
set_c0_cause(CAUSEF_IV);
}
#ifdef CONFIG_MIPS_MT_SMTC
}
#endif /* CONFIG_MIPS_MT_SMTC */
cpu_data[cpu].asid_cache = ASID_FIRST_VERSION;
TLBMISS_HANDLER_SETUP();
@ -1205,8 +1332,14 @@ void __init per_cpu_trap_init(void)
BUG_ON(current->mm);
enter_lazy_tlb(&init_mm, current);
cpu_cache_init();
tlb_init();
#ifdef CONFIG_MIPS_MT_SMTC
if (bootTC) {
#endif /* CONFIG_MIPS_MT_SMTC */
cpu_cache_init();
tlb_init();
#ifdef CONFIG_MIPS_MT_SMTC
}
#endif /* CONFIG_MIPS_MT_SMTC */
}
/* Install CPU exception handler */
@ -1278,7 +1411,7 @@ void __init trap_init(void)
if (cpu_has_veic || cpu_has_vint) {
int nvec = cpu_has_veic ? 64 : 8;
for (i = 0; i < nvec; i++)
set_vi_handler (i, NULL);
set_vi_handler(i, NULL);
}
else if (cpu_has_divec)
set_handler(0x200, &except_vec4, 0x8);
@ -1297,6 +1430,7 @@ void __init trap_init(void)
if (board_be_init)
board_be_init();
set_except_vector(0, handle_int);
set_except_vector(1, handle_tlbm);
set_except_vector(2, handle_tlbl);
set_except_vector(3, handle_tlbs);

2
arch/mips/kernel/vmlinux.lds.S
View File

@ -2,7 +2,7 @@
#include <asm/asm-offsets.h>
#include <asm-generic/vmlinux.lds.h>
#undef mips /* CPP really sucks for this job */
#undef mips
#define mips mips
OUTPUT_ARCH(mips)
ENTRY(kernel_entry)

657
arch/mips/kernel/vpe.c
View File

File diff suppressed because it is too large Load Diff

2
arch/mips/lasat/Makefile
View File

@ -3,7 +3,7 @@
#
obj-y += reset.o setup.o prom.o lasat_board.o \
at93c.o interrupt.o lasatIRQ.o
at93c.o interrupt.o
obj-$(CONFIG_LASAT_SYSCTL) += sysctl.o
obj-$(CONFIG_DS1603) += ds1603.o

14
arch/mips/lasat/interrupt.c
View File

@ -27,14 +27,13 @@
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/lasat/lasatint.h>
#include <asm/time.h>
#include <asm/gdb-stub.h>
static volatile int *lasat_int_status = NULL;
static volatile int *lasat_int_mask = NULL;
static volatile int lasat_int_mask_shift;
extern asmlinkage void lasatIRQ(void);
void disable_lasat_irq(unsigned int irq_nr)
{
unsigned long flags;
@ -109,11 +108,17 @@ static unsigned long get_int_status_200(void)
return int_status;
}
void lasat_hw0_irqdispatch(struct pt_regs *regs)
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned long int_status;
unsigned int cause = read_c0_cause();
int irq;
if (cause & CAUSEF_IP7) { /* R4000 count / compare IRQ */
ll_timer_interrupt(7, regs);
return;
}
int_status = get_int_status();
/* if int_status == 0, then the interrupt has already been cleared */
@ -147,9 +152,6 @@ void __init arch_init_irq(void)
panic("arch_init_irq: mips_machtype incorrect");
}
/* Now safe to set the exception vector. */
set_except_vector(0, lasatIRQ);
for (i = 0; i <= LASATINT_END; i++) {
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = 0;

69
arch/mips/lasat/lasatIRQ.S
View File

@ -1,69 +0,0 @@
/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Interrupt exception dispatch code.
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
.text
.set noreorder
.align 5
NESTED(lasatIRQ, PT_SIZE, sp)
.set noat
SAVE_ALL
CLI
.set at
.set noreorder
mfc0 s0, CP0_CAUSE # get irq mask
/* First we check for r4k counter/timer IRQ. */
andi a0, s0, CAUSEF_IP7
beq a0, zero, 1f
andi a0, s0, CAUSEF_IP2 # delay slot, check hw0 interrupt
/* Wheee, a timer interrupt. */
li a0, 7
jal ll_timer_interrupt
move a1, sp
j ret_from_irq
nop
1:
/* Wheee, combined hardware level zero interrupt. */
jal lasat_hw0_irqdispatch
move a0, sp # delay slot
j ret_from_irq
nop # delay slot
1:
/*
* Here by mistake? This is possible, what can happen is that by the
* time we take the exception the IRQ pin goes low, so just leave if
* this is the case.
*/
move a1,s0
mfc0 a1, CP0_EPC
j ret_from_irq
nop
END(lasatIRQ)

92
arch/mips/mips-boards/atlas/atlas_int.c
View File

@ -39,8 +39,6 @@
static struct atlas_ictrl_regs *atlas_hw0_icregs;
extern asmlinkage void mipsIRQ(void);
#if 0
#define DEBUG_INT(x...) printk(x)
#else
@ -98,7 +96,7 @@ static inline int ls1bit32(unsigned int x)
return b;
}
void atlas_hw0_irqdispatch(struct pt_regs *regs)
static inline void atlas_hw0_irqdispatch(struct pt_regs *regs)
{
unsigned long int_status;
int irq;
@ -116,6 +114,91 @@ void atlas_hw0_irqdispatch(struct pt_regs *regs)
do_IRQ(irq, regs);
}
static inline int clz(unsigned long x)
{
__asm__ (
" .set push \n"
" .set mips32 \n"
" clz %0, %1 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
return x;
}
/*
* Version of ffs that only looks at bits 12..15.
*/
static inline unsigned int irq_ffs(unsigned int pending)
{
#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
return -clz(pending) + 31 - CAUSEB_IP;
#else
unsigned int a0 = 7;
unsigned int t0;
t0 = s0 & 0xf000;
t0 = t0 < 1;
t0 = t0 << 2;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0xc000;
t0 = t0 < 1;
t0 = t0 << 1;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0x8000;
t0 = t0 < 1;
//t0 = t0 << 2;
a0 = a0 - t0;
//s0 = s0 << t0;
return a0;
#endif
}
/*
* IRQs on the Atlas board look basically (barring software IRQs which we
* don't use at all and all external interrupt sources are combined together
* on hardware interrupt 0 (MIPS IRQ 2)) like:
*
* MIPS IRQ Source
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 Combined hardware interrupt (hw0)
* 3 Hardware (ignored)
* 4 Hardware (ignored)
* 5 Hardware (ignored)
* 6 Hardware (ignored)
* 7 R4k timer (what we use)
*
* We handle the IRQ according to _our_ priority which is:
*
* Highest ---- R4k Timer
* Lowest ---- Combined hardware interrupt
*
* then we just return, if multiple IRQs are pending then we will just take
* another exception, big deal.
*/
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
int irq;
irq = irq_ffs(pending);
if (irq == MIPSCPU_INT_ATLAS)
atlas_hw0_irqdispatch(regs);
else if (irq > 0)
do_IRQ(MIPSCPU_INT_BASE + irq, regs);
else
spurious_interrupt(regs);
}
void __init arch_init_irq(void)
{
int i;
@ -128,9 +211,6 @@ void __init arch_init_irq(void)
*/
atlas_hw0_icregs->intrsten = 0xffffffff;
/* Now safe to set the exception vector. */
set_except_vector(0, mipsIRQ);
for (i = ATLASINT_BASE; i <= ATLASINT_END; i++) {
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = 0;

4
arch/mips/mips-boards/generic/Makefile
View File

@ -18,8 +18,8 @@
# Makefile for the MIPS boards generic routines under Linux.
#
obj-y := mipsIRQ.o reset.o display.o init.o memory.o \
printf.o cmdline.o time.o
obj-y := reset.o display.o init.o memory.o printf.o \
cmdline.o time.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_KGDB) += gdb_hook.o

2
arch/mips/mips-boards/generic/gdb_hook.c
View File

@ -25,7 +25,7 @@
#include <asm/serial.h>
#include <asm/io.h>
static struct serial_state rs_table[RS_TABLE_SIZE] = {
static struct serial_state rs_table[] = {
SERIAL_PORT_DFNS /* Defined in serial.h */
};

1
arch/mips/mips-boards/generic/init.c
View File

@ -220,7 +220,6 @@ void __init kgdb_config (void)
generic_putDebugChar (*s++);
}
kgdb_enabled = 1;
/* Breakpoint is invoked after interrupts are initialised */
}
}

9
arch/mips/mips-boards/generic/memory.c
View File

@ -22,10 +22,12 @@
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/string.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/mips-boards/prom.h>
@ -46,9 +48,6 @@ static char *mtypes[3] = {
};
#endif
/* References to section boundaries */
extern char _end;
struct prom_pmemblock * __init prom_getmdesc(void)
{
char *memsize_str;
@ -106,10 +105,10 @@ struct prom_pmemblock * __init prom_getmdesc(void)
mdesc[3].type = yamon_dontuse;
mdesc[3].base = 0x00100000;
mdesc[3].size = CPHYSADDR(PAGE_ALIGN(&_end)) - mdesc[3].base;
mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) - mdesc[3].base;
mdesc[4].type = yamon_free;
mdesc[4].base = CPHYSADDR(PAGE_ALIGN(&_end));
mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
mdesc[4].size = memsize - mdesc[4].base;
return &mdesc[0];

155
arch/mips/mips-boards/generic/mipsIRQ.S
View File

@ -1,155 +0,0 @@
/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
*
* ########################################################################
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* ########################################################################
*
* Interrupt exception dispatch code.
*
*/
#include <linux/config.h>
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#ifdef CONFIG_MIPS_ATLAS
#include <asm/mips-boards/atlasint.h>
#define CASCADE_IRQ MIPSCPU_INT_ATLAS
#define CASCADE_DISPATCH atlas_hw0_irqdispatch
#endif
#ifdef CONFIG_MIPS_MALTA
#include <asm/mips-boards/maltaint.h>
#define CASCADE_IRQ MIPSCPU_INT_I8259A
#define CASCADE_DISPATCH malta_hw0_irqdispatch
#endif
#ifdef CONFIG_MIPS_SEAD
#include <asm/mips-boards/seadint.h>
#endif
/* A lot of complication here is taken away because:
*
* 1) We handle one interrupt and return, sitting in a loop and moving across
* all the pending IRQ bits in the cause register is _NOT_ the answer, the
* common case is one pending IRQ so optimize in that direction.
*
* 2) We need not check against bits in the status register IRQ mask, that
* would make this routine slow as hell.
*
* 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in
* between like BSD spl() brain-damage.
*
* Furthermore, the IRQs on the MIPS board look basically (barring software
* IRQs which we don't use at all and all external interrupt sources are
* combined together on hardware interrupt 0 (MIPS IRQ 2)) like:
*
* MIPS IRQ Source
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 Combined hardware interrupt (hw0)
* 3 Hardware (ignored)
* 4 Hardware (ignored)
* 5 Hardware (ignored)
* 6 Hardware (ignored)
* 7 R4k timer (what we use)
*
* Note: On the SEAD board thing are a little bit different.
* Here IRQ 2 (hw0) is wired to the UART0 and IRQ 3 (hw1) is wired
* wired to UART1.
*
* We handle the IRQ according to _our_ priority which is:
*
* Highest ---- R4k Timer
* Lowest ---- Combined hardware interrupt
*
* then we just return, if multiple IRQs are pending then we will just take
* another exception, big deal.
*/
.text
.set noreorder
.set noat
.align 5
NESTED(mipsIRQ, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
mfc0 s0, CP0_CAUSE # get irq bits
mfc0 s1, CP0_STATUS # get irq mask
andi s0, ST0_IM # CAUSE.CE may be non-zero!
and s0, s1
#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
.set mips32
clz a0, s0
.set mips0
negu a0
addu a0, 31-CAUSEB_IP
bltz a0, spurious
#else
beqz s0, spurious
li a0, 7
and t0, s0, 0xf000
sltiu t0, t0, 1
sll t0, 2
subu a0, t0
sll s0, t0
and t0, s0, 0xc000
sltiu t0, t0, 1
sll t0, 1
subu a0, t0
sll s0, t0
and t0, s0, 0x8000
sltiu t0, t0, 1
# sll t0, 0
subu a0, t0
# sll s0, t0
#endif
#ifdef CASCADE_IRQ
li a1, CASCADE_IRQ
bne a0, a1, 1f
addu a0, MIPSCPU_INT_BASE
jal CASCADE_DISPATCH
move a0, sp
j ret_from_irq
nop
1:
#else
addu a0, MIPSCPU_INT_BASE
#endif
jal do_IRQ
move a1, sp
j ret_from_irq
nop
spurious:
j spurious_interrupt
nop
END(mipsIRQ)

68
arch/mips/mips-boards/generic/time.c
View File

@ -30,6 +30,7 @@
#include <linux/mc146818rtc.h>
#include <asm/mipsregs.h>
#include <asm/mipsmtregs.h>
#include <asm/ptrace.h>
#include <asm/hardirq.h>
#include <asm/irq.h>
@ -50,16 +51,23 @@ unsigned long cpu_khz;
static char display_string[] = " LINUX ON ATLAS ";
#endif
#if defined(CONFIG_MIPS_MALTA)
#if defined(CONFIG_MIPS_MT_SMTC)
static char display_string[] = " SMTC LINUX ON MALTA ";
#else
static char display_string[] = " LINUX ON MALTA ";
#endif /* CONFIG_MIPS_MT_SMTC */
#endif
#if defined(CONFIG_MIPS_SEAD)
static char display_string[] = " LINUX ON SEAD ";
#endif
static unsigned int display_count = 0;
static unsigned int display_count;
#define MAX_DISPLAY_COUNT (sizeof(display_string) - 8)
static unsigned int timer_tick_count=0;
#define CPUCTR_IMASKBIT (0x100 << MIPSCPU_INT_CPUCTR)
static unsigned int timer_tick_count;
static int mips_cpu_timer_irq;
extern void smtc_timer_broadcast(int);
static inline void scroll_display_message(void)
{
@ -75,15 +83,55 @@ static void mips_timer_dispatch (struct pt_regs *regs)
do_IRQ (mips_cpu_timer_irq, regs);
}
/*
* Redeclare until I get around mopping the timer code insanity on MIPS.
*/
extern int null_perf_irq(struct pt_regs *regs);
extern int (*perf_irq)(struct pt_regs *regs);
irqreturn_t mips_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
int r2 = cpu_has_mips_r2;
int cpu = smp_processor_id();
int r2 = cpu_has_mips_r2;
#ifdef CONFIG_MIPS_MT_SMTC
/*
* In an SMTC system, one Count/Compare set exists per VPE.
* Which TC within a VPE gets the interrupt is essentially
* random - we only know that it shouldn't be one with
* IXMT set. Whichever TC gets the interrupt needs to
* send special interprocessor interrupts to the other
* TCs to make sure that they schedule, etc.
*
* That code is specific to the SMTC kernel, not to
* the a particular platform, so it's invoked from
* the general MIPS timer_interrupt routine.
*/
/*
* DVPE is necessary so long as cross-VPE interrupts
* are done via read-modify-write of Cause register.
*/
int vpflags = dvpe();
write_c0_compare (read_c0_count() - 1);
clear_c0_cause(CPUCTR_IMASKBIT);
evpe(vpflags);
if (cpu_data[cpu].vpe_id == 0) {
timer_interrupt(irq, dev_id, regs);
scroll_display_message();
} else
write_c0_compare (read_c0_count() + ( mips_hpt_frequency/HZ));
smtc_timer_broadcast(cpu_data[cpu].vpe_id);
if (cpu != 0)
/*
* Other CPUs should do profiling and process accounting
*/
local_timer_interrupt(irq, dev_id, regs);
#else /* CONFIG_MIPS_MT_SMTC */
if (cpu == 0) {
/*
* CPU 0 handles the global timer interrupt job and process
@ -107,12 +155,14 @@ irqreturn_t mips_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
* More support needs to be added to kernel/time for
* counter/timer interrupts on multiple CPU's
*/
write_c0_compare (read_c0_count() + (mips_hpt_frequency/HZ));
write_c0_compare(read_c0_count() + (mips_hpt_frequency/HZ));
/*
* other CPUs should do profiling and process accounting
* Other CPUs should do profiling and process accounting
*/
local_timer_interrupt (irq, dev_id, regs);
local_timer_interrupt(irq, dev_id, regs);
}
#endif /* CONFIG_MIPS_MT_SMTC */
out:
return IRQ_HANDLED;
@ -126,7 +176,7 @@ static unsigned int __init estimate_cpu_frequency(void)
unsigned int prid = read_c0_prid() & 0xffff00;
unsigned int count;
#ifdef CONFIG_MIPS_SEAD
#if defined(CONFIG_MIPS_SEAD) || defined(CONFIG_MIPS_SIM)
/*
* The SEAD board doesn't have a real time clock, so we can't
* really calculate the timer frequency
@ -211,7 +261,11 @@ void __init mips_timer_setup(struct irqaction *irq)
/* we are using the cpu counter for timer interrupts */
irq->handler = mips_timer_interrupt; /* we use our own handler */
#ifdef CONFIG_MIPS_MT_SMTC
setup_irq_smtc(mips_cpu_timer_irq, irq, CPUCTR_IMASKBIT);
#else
setup_irq(mips_cpu_timer_irq, irq);
#endif /* CONFIG_MIPS_MT_SMTC */
#ifdef CONFIG_SMP
/* irq_desc(riptor) is a global resource, when the interrupt overlaps

1
arch/mips/mips-boards/malta/Makefile
View File

@ -20,3 +20,4 @@
#
obj-y := malta_int.o malta_setup.o
obj-$(CONFIG_SMP) += malta_smp.o

102
arch/mips/mips-boards/malta/malta_int.c
View File

@ -40,7 +40,6 @@
#include <asm/mips-boards/msc01_pci.h>
#include <asm/msc01_ic.h>
extern asmlinkage void mipsIRQ(void);
extern void mips_timer_interrupt(void);
static DEFINE_SPINLOCK(mips_irq_lock);
@ -114,13 +113,14 @@ static inline int get_int(void)
return irq;
}
void malta_hw0_irqdispatch(struct pt_regs *regs)
static void malta_hw0_irqdispatch(struct pt_regs *regs)
{
int irq;
irq = get_int();
if (irq < 0)
if (irq < 0) {
return; /* interrupt has already been cleared */
}
do_IRQ(MALTA_INT_BASE+irq, regs);
}
@ -182,6 +182,92 @@ void corehi_irqdispatch(struct pt_regs *regs)
die("CoreHi interrupt", regs);
}
static inline int clz(unsigned long x)
{
__asm__ (
" .set push \n"
" .set mips32 \n"
" clz %0, %1 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
return x;
}
/*
* Version of ffs that only looks at bits 12..15.
*/
static inline unsigned int irq_ffs(unsigned int pending)
{
#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
return -clz(pending) + 31 - CAUSEB_IP;
#else
unsigned int a0 = 7;
unsigned int t0;
t0 = s0 & 0xf000;
t0 = t0 < 1;
t0 = t0 << 2;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0xc000;
t0 = t0 < 1;
t0 = t0 << 1;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0x8000;
t0 = t0 < 1;
//t0 = t0 << 2;
a0 = a0 - t0;
//s0 = s0 << t0;
return a0;
#endif
}
/*
* IRQs on the Malta board look basically (barring software IRQs which we
* don't use at all and all external interrupt sources are combined together
* on hardware interrupt 0 (MIPS IRQ 2)) like:
*
* MIPS IRQ Source
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 Combined hardware interrupt (hw0)
* 3 Hardware (ignored)
* 4 Hardware (ignored)
* 5 Hardware (ignored)
* 6 Hardware (ignored)
* 7 R4k timer (what we use)
*
* We handle the IRQ according to _our_ priority which is:
*
* Highest ---- R4k Timer
* Lowest ---- Combined hardware interrupt
*
* then we just return, if multiple IRQs are pending then we will just take
* another exception, big deal.
*/
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
int irq;
irq = irq_ffs(pending);
if (irq == MIPSCPU_INT_I8259A)
malta_hw0_irqdispatch(regs);
else if (irq > 0)
do_IRQ(MIPSCPU_INT_BASE + irq, regs);
else
spurious_interrupt(regs);
}
static struct irqaction i8259irq = {
.handler = no_action,
.name = "XT-PIC cascade"
@ -214,7 +300,6 @@ int __initdata msc_nr_eicirqs = sizeof(msc_eicirqmap)/sizeof(msc_irqmap_t);
void __init arch_init_irq(void)
{
set_except_vector(0, mipsIRQ);
init_i8259_irqs();
if (!cpu_has_veic)
@ -240,12 +325,17 @@ void __init arch_init_irq(void)
else if (cpu_has_vint) {
set_vi_handler (MIPSCPU_INT_I8259A, malta_hw0_irqdispatch);
set_vi_handler (MIPSCPU_INT_COREHI, corehi_irqdispatch);
#ifdef CONFIG_MIPS_MT_SMTC
setup_irq_smtc (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq,
(0x100 << MIPSCPU_INT_I8259A));
setup_irq_smtc (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI,
&corehi_irqaction, (0x100 << MIPSCPU_INT_COREHI));
#else /* Not SMTC */
setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
#endif /* CONFIG_MIPS_MT_SMTC */
}
else {
set_except_vector(0, mipsIRQ);
setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
}

128
arch/mips/mips-boards/malta/malta_smp.c Normal file
View File

@ -0,0 +1,128 @@
/*
* Malta Platform-specific hooks for SMP operation
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <asm/atomic.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/hardirq.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
#ifdef CONFIG_MIPS_MT_SMTC
#include <asm/smtc_ipi.h>
#endif /* CONFIG_MIPS_MT_SMTC */
/* VPE/SMP Prototype implements platform interfaces directly */
#if !defined(CONFIG_MIPS_MT_SMP)
/*
* Cause the specified action to be performed on a targeted "CPU"
*/
void core_send_ipi(int cpu, unsigned int action)
{
/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
#ifdef CONFIG_MIPS_MT_SMTC
smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Detect available CPUs/VPEs/TCs and populate phys_cpu_present_map
*/
void __init prom_build_cpu_map(void)
{
int nextslot;
/*
* As of November, 2004, MIPSsim only simulates one core
* at a time. However, that core may be a MIPS MT core
* with multiple virtual processors and thread contexts.
*/
if (read_c0_config3() & (1<<2)) {
nextslot = mipsmt_build_cpu_map(1);
}
}
/*
* Platform "CPU" startup hook
*/
void prom_boot_secondary(int cpu, struct task_struct *idle)
{
#ifdef CONFIG_MIPS_MT_SMTC
smtc_boot_secondary(cpu, idle);
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Post-config but pre-boot cleanup entry point
*/
void prom_init_secondary(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
void smtc_init_secondary(void);
int myvpe;
/* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
myvpe = read_c0_tcbind() & TCBIND_CURVPE;
if (myvpe != 0) {
/* Ideally, this should be done only once per VPE, but... */
clear_c0_status(STATUSF_IP2);
set_c0_status(STATUSF_IP0 | STATUSF_IP1 | STATUSF_IP3
| STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6
| STATUSF_IP7);
}
smtc_init_secondary();
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Platform SMP pre-initialization
*
* As noted above, we can assume a single CPU for now
* but it may be multithreaded.
*/
void plat_smp_setup(void)
{
if (read_c0_config3() & (1<<2))
mipsmt_build_cpu_map(0);
}
void __init plat_prepare_cpus(unsigned int max_cpus)
{
if (read_c0_config3() & (1<<2))
mipsmt_prepare_cpus();
}
/*
* SMP initialization finalization entry point
*/
void prom_smp_finish(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
smtc_smp_finish();
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Hook for after all CPUs are online
*/
void prom_cpus_done(void)
{
}
#endif /* CONFIG_MIPS32R2_MT_SMP */

86
arch/mips/mips-boards/sead/sead_int.c
View File

@ -24,16 +24,94 @@
#include <linux/irq.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
#include <asm/system.h>
#include <asm/mips-boards/seadint.h>
extern asmlinkage void mipsIRQ(void);
static inline int clz(unsigned long x)
{
__asm__ (
" .set push \n"
" .set mips32 \n"
" clz %0, %1 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
return x;
}
/*
* Version of ffs that only looks at bits 12..15.
*/
static inline unsigned int irq_ffs(unsigned int pending)
{
#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
return -clz(pending) + 31 - CAUSEB_IP;
#else
unsigned int a0 = 7;
unsigned int t0;
t0 = s0 & 0xf000;
t0 = t0 < 1;
t0 = t0 << 2;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0xc000;
t0 = t0 < 1;
t0 = t0 << 1;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0x8000;
t0 = t0 < 1;
//t0 = t0 << 2;
a0 = a0 - t0;
//s0 = s0 << t0;
return a0;
#endif
}
/*
* IRQs on the SEAD board look basically are combined together on hardware
* interrupt 0 (MIPS IRQ 2)) like:
*
* MIPS IRQ Source
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 UART0 (hw0)
* 3 UART1 (hw1)
* 4 Hardware (ignored)
* 5 Hardware (ignored)
* 6 Hardware (ignored)
* 7 R4k timer (what we use)
*
* We handle the IRQ according to _our_ priority which is:
*
* Highest ---- R4k Timer
* Lowest ---- Combined hardware interrupt
*
* then we just return, if multiple IRQs are pending then we will just take
* another exception, big deal.
*/
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
int irq;
irq = irq_ffs(pending);
if (irq >= 0)
do_IRQ(MIPSCPU_INT_BASE + irq, regs);
else
spurious_interrupt(regs);
}
void __init arch_init_irq(void)
{
mips_cpu_irq_init(MIPSCPU_INT_BASE);
/* Now safe to set the exception vector. */
set_except_vector(0, mipsIRQ);
}

59
arch/mips/mips-boards/sim/cmdline.c
View File

@ -1,59 +0,0 @@
/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Kernel command line creation using the prom monitor (YAMON) argc/argv.
*/
#include <linux/init.h>
#include <linux/string.h>
#include <asm/bootinfo.h>
extern int prom_argc;
extern int *_prom_argv;
/*
* YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
* This macro take care of sign extension.
*/
#define prom_argv(index) ((char *)(((int *)(int)_prom_argv)[(index)]))
char arcs_cmdline[CL_SIZE];
char * __init prom_getcmdline(void)
{
return &(arcs_cmdline[0]);
}
void __init prom_init_cmdline(void)
{
char *cp;
int actr;
actr = 1; /* Always ignore argv[0] */
cp = &(arcs_cmdline[0]);
while(actr < prom_argc) {
strcpy(cp, prom_argv(actr));
cp += strlen(prom_argv(actr));
*cp++ = ' ';
actr++;
}
if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
--cp;
*cp = '\0';
}

6
arch/mips/mips-boards/sim/sim_cmdline.c
View File

@ -26,8 +26,10 @@ char * __init prom_getcmdline(void)
return arcs_cmdline;
}
void __init prom_init_cmdline(void)
{
/* nothing to do */
char *cp;
cp = arcs_cmdline;
/* Get boot line from environment? */
*cp = '\0';
}

64
arch/mips/mips-boards/sim/sim_int.c
View File

@ -25,17 +25,71 @@
extern void mips_cpu_irq_init(int);
extern asmlinkage void simIRQ(void);
static inline int clz(unsigned long x)
{
__asm__ (
" .set push \n"
" .set mips32 \n"
" clz %0, %1 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
asmlinkage void sim_hw0_irqdispatch(struct pt_regs *regs)
return x;
}
/*
* Version of ffs that only looks at bits 12..15.
*/
static inline unsigned int irq_ffs(unsigned int pending)
{
#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
return -clz(pending) + 31 - CAUSEB_IP;
#else
unsigned int a0 = 7;
unsigned int t0;
t0 = s0 & 0xf000;
t0 = t0 < 1;
t0 = t0 << 2;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0xc000;
t0 = t0 < 1;
t0 = t0 << 1;
a0 = a0 - t0;
s0 = s0 << t0;
t0 = s0 & 0x8000;
t0 = t0 < 1;
//t0 = t0 << 2;
a0 = a0 - t0;
//s0 = s0 << t0;
return a0;
#endif
}
static inline void sim_hw0_irqdispatch(struct pt_regs *regs)
{
do_IRQ(2, regs);
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
int irq;
irq = irq_ffs(pending);
if (irq > 0)
do_IRQ(MIPSCPU_INT_BASE + irq, regs);
else
spurious_interrupt(regs);
}
void __init arch_init_irq(void)
{
/* Now safe to set the exception vector. */
set_except_vector(0, simIRQ);
mips_cpu_irq_init(MIPSCPU_INT_BASE);
}

4
arch/mips/mips-boards/sim/sim_irq.S
View File

@ -94,6 +94,8 @@
spurious:
j spurious_interrupt
jal spurious_interrupt
nop
j ret_from_irq
nop
END(simIRQ)

9
arch/mips/mips-boards/sim/sim_mem.c
View File

@ -18,9 +18,11 @@
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/mips-boards/prom.h>
@ -39,9 +41,6 @@ static char *mtypes[3] = {
};
#endif
/* References to section boundaries */
extern char _end;
struct prom_pmemblock * __init prom_getmdesc(void)
{
unsigned int memsize;
@ -61,10 +60,10 @@ struct prom_pmemblock * __init prom_getmdesc(void)
mdesc[2].type = simmem_reserved;
mdesc[2].base = 0x00100000;
mdesc[2].size = CPHYSADDR(PAGE_ALIGN(&_end)) - mdesc[2].base;
mdesc[2].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[2].base;
mdesc[3].type = simmem_free;
mdesc[3].base = CPHYSADDR(PAGE_ALIGN(&_end));
mdesc[3].base = CPHYSADDR(PFN_ALIGN(&_end));
mdesc[3].size = memsize - mdesc[3].base;
return &mdesc[0];

14
arch/mips/mips-boards/sim/sim_smp.c
View File

@ -44,8 +44,6 @@
void core_send_ipi(int cpu, unsigned int action)
{
#ifdef CONFIG_MIPS_MT_SMTC
void smtc_send_ipi(int, int, unsigned int);
smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
#endif /* CONFIG_MIPS_MT_SMTC */
/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
@ -59,15 +57,8 @@ void core_send_ipi(int cpu, unsigned int action)
void __init prom_build_cpu_map(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
extern int mipsmt_build_cpu_map(int startslot);
int nextslot;
cpus_clear(phys_cpu_present_map);
/* Register the boot CPU */
smp_prepare_boot_cpu();
/*
* As of November, 2004, MIPSsim only simulates one core
* at a time. However, that core may be a MIPS MT core
@ -87,8 +78,6 @@ void __init prom_build_cpu_map(void)
void prom_boot_secondary(int cpu, struct task_struct *idle)
{
#ifdef CONFIG_MIPS_MT_SMTC
extern void smtc_boot_secondary(int cpu, struct task_struct *t);
smtc_boot_secondary(cpu, idle);
#endif /* CONFIG_MIPS_MT_SMTC */
}
@ -113,7 +102,6 @@ void prom_init_secondary(void)
void prom_prepare_cpus(unsigned int max_cpus)
{
#ifdef CONFIG_MIPS_MT_SMTC
void mipsmt_prepare_cpus(int c);
/*
* As noted above, we can assume a single CPU for now
* but it may be multithreaded.
@ -132,8 +120,6 @@ void prom_prepare_cpus(unsigned int max_cpus)
void prom_smp_finish(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
void smtc_smp_finish(void);
smtc_smp_finish();
#endif /* CONFIG_MIPS_MT_SMTC */
}

5
arch/mips/mm/c-r3k.c
View File

@ -260,6 +260,10 @@ static void r3k_flush_cache_page(struct vm_area_struct *vma, unsigned long page,
{
}
static void local_r3k_flush_data_cache_page(unsigned long addr)
{
}
static void r3k_flush_data_cache_page(unsigned long addr)
{
}
@ -335,6 +339,7 @@ void __init r3k_cache_init(void)
flush_icache_range = r3k_flush_icache_range;
flush_cache_sigtramp = r3k_flush_cache_sigtramp;
local_flush_data_cache_page = local_r3k_flush_data_cache_page;
flush_data_cache_page = r3k_flush_data_cache_page;
_dma_cache_wback_inv = r3k_dma_cache_wback_inv;

20
arch/mips/mm/c-r4k.c
View File

@ -154,7 +154,8 @@ static inline void blast_icache32_r4600_v1_page_indexed(unsigned long page)
static inline void tx49_blast_icache32_page_indexed(unsigned long page)
{
unsigned long start = page;
unsigned long indexmask = current_cpu_data.icache.waysize - 1;
unsigned long start = INDEX_BASE + (page & indexmask);
unsigned long end = start + PAGE_SIZE;
unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit;
unsigned long ws_end = current_cpu_data.icache.ways <<
@ -749,12 +750,12 @@ static void __init probe_pcache(void)
icache_size = 1 << (12 + ((config & CONF_IC) >> 9));
c->icache.linesz = 16 << ((config & CONF_IB) >> 5);
c->icache.ways = 2;
c->icache.waybit = ffs(icache_size/2) - 1;
c->icache.waybit = __ffs(icache_size/2);
dcache_size = 1 << (12 + ((config & CONF_DC) >> 6));
c->dcache.linesz = 16 << ((config & CONF_DB) >> 4);
c->dcache.ways = 2;
c->dcache.waybit= ffs(dcache_size/2) - 1;
c->dcache.waybit= __ffs(dcache_size/2);
c->options |= MIPS_CPU_CACHE_CDEX_P;
break;
@ -837,12 +838,12 @@ static void __init probe_pcache(void)
icache_size = 1 << (10 + ((config & CONF_IC) >> 9));
c->icache.linesz = 16 << ((config & CONF_IB) >> 5);
c->icache.ways = 2;
c->icache.waybit = ffs(icache_size/2) - 1;
c->icache.waybit = __ffs(icache_size/2);
dcache_size = 1 << (10 + ((config & CONF_DC) >> 6));
c->dcache.linesz = 16 << ((config & CONF_DB) >> 4);
c->dcache.ways = 2;
c->dcache.waybit = ffs(dcache_size/2) - 1;
c->dcache.waybit = __ffs(dcache_size/2);
c->options |= MIPS_CPU_CACHE_CDEX_P;
break;
@ -873,12 +874,12 @@ static void __init probe_pcache(void)
icache_size = 1 << (12 + ((config & CONF_IC) >> 9));
c->icache.linesz = 16 << ((config & CONF_IB) >> 5);
c->icache.ways = 4;
c->icache.waybit = ffs(icache_size / c->icache.ways) - 1;
c->icache.waybit = __ffs(icache_size / c->icache.ways);
dcache_size = 1 << (12 + ((config & CONF_DC) >> 6));
c->dcache.linesz = 16 << ((config & CONF_DB) >> 4);
c->dcache.ways = 4;
c->dcache.waybit = ffs(dcache_size / c->dcache.ways) - 1;
c->dcache.waybit = __ffs(dcache_size / c->dcache.ways);
#if !defined(CONFIG_SMP) || !defined(RM9000_CDEX_SMP_WAR)
c->options |= MIPS_CPU_CACHE_CDEX_P;
@ -906,7 +907,7 @@ static void __init probe_pcache(void)
icache_size = c->icache.sets *
c->icache.ways *
c->icache.linesz;
c->icache.waybit = ffs(icache_size/c->icache.ways) - 1;
c->icache.waybit = __ffs(icache_size/c->icache.ways);
if (config & 0x8) /* VI bit */
c->icache.flags |= MIPS_CACHE_VTAG;
@ -926,7 +927,7 @@ static void __init probe_pcache(void)
dcache_size = c->dcache.sets *
c->dcache.ways *
c->dcache.linesz;
c->dcache.waybit = ffs(dcache_size/c->dcache.ways) - 1;
c->dcache.waybit = __ffs(dcache_size/c->dcache.ways);
c->options |= MIPS_CPU_PREFETCH;
break;
@ -1198,6 +1199,7 @@ void __init r4k_cache_init(void)
flush_cache_sigtramp = r4k_flush_cache_sigtramp;
flush_icache_all = r4k_flush_icache_all;
local_flush_data_cache_page = local_r4k_flush_data_cache_page;
flush_data_cache_page = r4k_flush_data_cache_page;
flush_icache_range = r4k_flush_icache_range;

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