mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 00:04:15 +08:00
sh: Exception vector rework and SH-2/SH-2A support.
This splits out common bits from the existing exception handler for use between SH-2/SH-2A and SH-3/4, and adds support for the SH-2/2A exceptions. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Yoshinori Sato
Paul Mundt
parent
0983b31849
commit
de39840646
325
arch/sh/kernel/cpu/sh2/entry.S
Normal file
325
arch/sh/kernel/cpu/sh2/entry.S
Normal file
@ -0,0 +1,325 @@
|
||||
/*
|
||||
* arch/sh/kernel/cpu/sh2/entry.S
|
||||
*
|
||||
* The SH-2 exception entry
|
||||
*
|
||||
* Copyright (C) 2005,2006 Yoshinori Sato
|
||||
* Copyright (C) 2005 AXE,Inc.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/asm-offsets.h>
|
||||
#include <asm/thread_info.h>
|
||||
#include <asm/cpu/mmu_context.h>
|
||||
#include <asm/unistd.h>
|
||||
#include <asm/errno.h>
|
||||
#include <asm/page.h>
|
||||
|
||||
/* Offsets to the stack */
|
||||
OFF_R0 = 0 /* Return value. New ABI also arg4 */
|
||||
OFF_R1 = 4 /* New ABI: arg5 */
|
||||
OFF_R2 = 8 /* New ABI: arg6 */
|
||||
OFF_R3 = 12 /* New ABI: syscall_nr */
|
||||
OFF_R4 = 16 /* New ABI: arg0 */
|
||||
OFF_R5 = 20 /* New ABI: arg1 */
|
||||
OFF_R6 = 24 /* New ABI: arg2 */
|
||||
OFF_R7 = 28 /* New ABI: arg3 */
|
||||
OFF_SP = (15*4)
|
||||
OFF_PC = (16*4)
|
||||
OFF_SR = (16*4+2*4)
|
||||
OFF_TRA = (16*4+6*4)
|
||||
|
||||
#include <asm/entry-macros.S>
|
||||
|
||||
ENTRY(exception_handler)
|
||||
! already saved r0/r1
|
||||
mov.l r2,@-sp
|
||||
mov.l r3,@-sp
|
||||
mov r0,r1
|
||||
cli
|
||||
mov.l $cpu_mode,r2
|
||||
mov.l @r2,r0
|
||||
mov.l @(5*4,r15),r3 ! previous SR
|
||||
shll2 r3 ! set "S" flag
|
||||
rotl r0 ! T <- "S" flag
|
||||
rotl r0 ! "S" flag is LSB
|
||||
rotcr r3 ! T -> r3:b30
|
||||
shlr r3
|
||||
shlr r0
|
||||
bt/s 1f
|
||||
mov.l r3,@(5*4,r15) ! copy cpu mode to SR
|
||||
! switch to kernel mode
|
||||
mov #1,r0
|
||||
rotr r0
|
||||
rotr r0
|
||||
mov.l r0,@r2 ! enter kernel mode
|
||||
mov.l $current_thread_info,r2
|
||||
mov.l @r2,r2
|
||||
mov #0x20,r0
|
||||
shll8 r0
|
||||
add r2,r0
|
||||
mov r15,r2 ! r2 = user stack top
|
||||
mov r0,r15 ! switch kernel stack
|
||||
add #-4,r15 ! dummy
|
||||
mov.l r1,@-r15 ! TRA
|
||||
sts.l macl, @-r15
|
||||
sts.l mach, @-r15
|
||||
stc.l gbr, @-r15
|
||||
mov.l @(4*4,r2),r0
|
||||
mov.l @(5*4,r2),r1
|
||||
mov.l r1,@-r15 ! original SR
|
||||
sts.l pr,@-r15
|
||||
mov.l r0,@-r15 ! original PC
|
||||
mov r2,r3
|
||||
add #(4+2)*4,r3 ! rewind r0 - r3 + exception frame
|
||||
mov.l r3,@-r15 ! original SP
|
||||
mov.l r14,@-r15
|
||||
mov.l r13,@-r15
|
||||
mov.l r12,@-r15
|
||||
mov.l r11,@-r15
|
||||
mov.l r10,@-r15
|
||||
mov.l r9,@-r15
|
||||
mov.l r8,@-r15
|
||||
mov.l r7,@-r15
|
||||
mov.l r6,@-r15
|
||||
mov.l r5,@-r15
|
||||
mov.l r4,@-r15
|
||||
mov r2,r8 ! copy user -> kernel stack
|
||||
mov.l @r8+,r3
|
||||
mov.l r3,@-r15
|
||||
mov.l @r8+,r2
|
||||
mov.l r2,@-r15
|
||||
mov.l @r8+,r1
|
||||
mov.l r1,@-r15
|
||||
mov.l @r8+,r0
|
||||
bra 2f
|
||||
mov.l r0,@-r15
|
||||
1:
|
||||
! in kernel exception
|
||||
mov #(22-4-4-1)*4+4,r0
|
||||
mov r15,r2
|
||||
sub r0,r15
|
||||
mov.l @r2+,r0 ! old R3
|
||||
mov.l r0,@-r15
|
||||
mov.l @r2+,r0 ! old R2
|
||||
mov.l r0,@-r15
|
||||
mov.l @r2+,r0 ! old R1
|
||||
mov.l r0,@-r15
|
||||
mov.l @r2+,r0 ! old R0
|
||||
mov.l r0,@-r15
|
||||
mov.l @r2+,r3 ! old PC
|
||||
mov.l @r2+,r0 ! old SR
|
||||
add #-4,r2 ! exception frame stub (sr)
|
||||
mov.l r1,@-r2 ! TRA
|
||||
sts.l macl, @-r2
|
||||
sts.l mach, @-r2
|
||||
stc.l gbr, @-r2
|
||||
mov.l r0,@-r2 ! save old SR
|
||||
sts.l pr,@-r2
|
||||
mov.l r3,@-r2 ! save old PC
|
||||
mov r2,r0
|
||||
add #8*4,r0
|
||||
mov.l r0,@-r2 ! save old SP
|
||||
mov.l r14,@-r2
|
||||
mov.l r13,@-r2
|
||||
mov.l r12,@-r2
|
||||
mov.l r11,@-r2
|
||||
mov.l r10,@-r2
|
||||
mov.l r9,@-r2
|
||||
mov.l r8,@-r2
|
||||
mov.l r7,@-r2
|
||||
mov.l r6,@-r2
|
||||
mov.l r5,@-r2
|
||||
mov.l r4,@-r2
|
||||
mov.l @(OFF_R0,r15),r0
|
||||
mov.l @(OFF_R1,r15),r1
|
||||
mov.l @(OFF_R2,r15),r2
|
||||
mov.l @(OFF_R3,r15),r3
|
||||
2:
|
||||
mov #OFF_TRA,r8
|
||||
add r15,r8
|
||||
mov.l @r8,r9
|
||||
mov #64,r8
|
||||
cmp/hs r8,r9
|
||||
bt interrupt_entry ! vec >= 64 is interrupt
|
||||
mov #32,r8
|
||||
cmp/hs r8,r9
|
||||
bt trap_entry ! 64 > vec >= 32 is trap
|
||||
mov.l 4f,r8
|
||||
mov r9,r4
|
||||
shll2 r9
|
||||
add r9,r8
|
||||
mov.l @r8,r8
|
||||
mov #0,r9
|
||||
cmp/eq r9,r8
|
||||
bf 3f
|
||||
mov.l 8f,r8 ! unhandled exception
|
||||
3:
|
||||
mov.l 5f,r10
|
||||
jmp @r8
|
||||
lds r10,pr
|
||||
|
||||
interrupt_entry:
|
||||
mov r9,r4
|
||||
mov.l 6f,r9
|
||||
mov.l 7f,r8
|
||||
jmp @r8
|
||||
lds r9,pr
|
||||
|
||||
.align 2
|
||||
4: .long exception_handling_table
|
||||
5: .long ret_from_exception
|
||||
6: .long ret_from_irq
|
||||
7: .long do_IRQ
|
||||
8: .long do_exception_error
|
||||
|
||||
trap_entry:
|
||||
add #-0x10,r9
|
||||
shll2 r9 ! TRA
|
||||
mov #OFF_TRA,r8
|
||||
add r15,r8
|
||||
mov.l r9,@r8
|
||||
mov r9,r8
|
||||
sti
|
||||
bra system_call
|
||||
nop
|
||||
|
||||
.align 2
|
||||
1: .long syscall_exit
|
||||
2: .long break_point_trap_software
|
||||
3: .long NR_syscalls
|
||||
4: .long sys_call_table
|
||||
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS)
|
||||
/* Unwind the stack and jmp to the debug entry */
|
||||
debug_kernel_fw:
|
||||
mov r15,r0
|
||||
add #(22-4)*4-4,r0
|
||||
ldc.l @r0+,gbr
|
||||
lds.l @r0+,mach
|
||||
lds.l @r0+,macl
|
||||
mov r15,r0
|
||||
mov.l @(OFF_SP,r0),r1
|
||||
mov #OFF_SR,r2
|
||||
mov.l @(r0,r2),r3
|
||||
mov.l r3,@-r1
|
||||
mov #OFF_SP,r2
|
||||
mov.l @(r0,r2),r3
|
||||
mov.l r3,@-r1
|
||||
mov r15,r0
|
||||
add #(22-4)*4-8,r0
|
||||
mov.l 1f,r2
|
||||
mov.l @r2,r2
|
||||
stc sr,r3
|
||||
mov.l r2,@r0
|
||||
mov.l r3,@r0
|
||||
mov.l r1,@(8,r0)
|
||||
mov.l @r15+, r0
|
||||
mov.l @r15+, r1
|
||||
mov.l @r15+, r2
|
||||
mov.l @r15+, r3
|
||||
mov.l @r15+, r4
|
||||
mov.l @r15+, r5
|
||||
mov.l @r15+, r6
|
||||
mov.l @r15+, r7
|
||||
mov.l @r15+, r8
|
||||
mov.l @r15+, r9
|
||||
mov.l @r15+, r10
|
||||
mov.l @r15+, r11
|
||||
mov.l @r15+, r12
|
||||
mov.l @r15+, r13
|
||||
mov.l @r15+, r14
|
||||
add #8,r15
|
||||
lds.l @r15+, pr
|
||||
rte
|
||||
mov.l @r15+,r15
|
||||
.align 2
|
||||
1: .long gdb_vbr_vector
|
||||
#endif /* CONFIG_SH_STANDARD_BIOS */
|
||||
|
||||
ENTRY(address_error_handler)
|
||||
mov r15,r4 ! regs
|
||||
add #4,r4
|
||||
mov #OFF_PC,r0
|
||||
mov.l @(r0,r15),r6 ! pc
|
||||
mov.l 1f,r0
|
||||
jmp @r0
|
||||
mov #0,r5 ! writeaccess is unknown
|
||||
.align 2
|
||||
|
||||
1: .long do_address_error
|
||||
|
||||
restore_all:
|
||||
cli
|
||||
mov r15,r0
|
||||
mov.l $cpu_mode,r2
|
||||
mov #OFF_SR,r3
|
||||
mov.l @(r0,r3),r1
|
||||
mov.l r1,@r2
|
||||
shll2 r1 ! clear MD bit
|
||||
shlr2 r1
|
||||
mov.l @(OFF_SP,r0),r2
|
||||
add #-8,r2
|
||||
mov.l r2,@(OFF_SP,r0) ! point exception frame top
|
||||
mov.l r1,@(4,r2) ! set sr
|
||||
mov #OFF_PC,r3
|
||||
mov.l @(r0,r3),r1
|
||||
mov.l r1,@r2 ! set pc
|
||||
add #4*16+4,r0
|
||||
lds.l @r0+,pr
|
||||
add #4,r0 ! skip sr
|
||||
ldc.l @r0+,gbr
|
||||
lds.l @r0+,mach
|
||||
lds.l @r0+,macl
|
||||
get_current_thread_info r0, r1
|
||||
mov.l $current_thread_info,r1
|
||||
mov.l r0,@r1
|
||||
mov.l @r15+,r0
|
||||
mov.l @r15+,r1
|
||||
mov.l @r15+,r2
|
||||
mov.l @r15+,r3
|
||||
mov.l @r15+,r4
|
||||
mov.l @r15+,r5
|
||||
mov.l @r15+,r6
|
||||
mov.l @r15+,r7
|
||||
mov.l @r15+,r8
|
||||
mov.l @r15+,r9
|
||||
mov.l @r15+,r10
|
||||
mov.l @r15+,r11
|
||||
mov.l @r15+,r12
|
||||
mov.l @r15+,r13
|
||||
mov.l @r15+,r14
|
||||
mov.l @r15,r15
|
||||
rte
|
||||
nop
|
||||
2:
|
||||
mov.l 1f,r8
|
||||
mov.l 2f,r9
|
||||
jmp @r9
|
||||
lds r8,pr
|
||||
|
||||
.align 2
|
||||
$current_thread_info:
|
||||
.long __current_thread_info
|
||||
$cpu_mode:
|
||||
.long __cpu_mode
|
||||
|
||||
! common exception handler
|
||||
#include "../../entry-common.S"
|
||||
|
||||
.data
|
||||
! cpu operation mode
|
||||
! bit30 = MD (compatible SH3/4)
|
||||
__cpu_mode:
|
||||
.long 0x40000000
|
||||
|
||||
.section .bss
|
||||
__current_thread_info:
|
||||
.long 0
|
||||
|
||||
ENTRY(exception_handling_table)
|
||||
.space 4*32
|
||||
46
arch/sh/kernel/cpu/sh2/ex.S
Normal file
46
arch/sh/kernel/cpu/sh2/ex.S
Normal file
@ -0,0 +1,46 @@
|
||||
/*
|
||||
* arch/sh/kernel/cpu/sh2/ex.S
|
||||
*
|
||||
* The SH-2 exception vector table
|
||||
*
|
||||
* Copyright (C) 2005 Yoshinori Sato
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
|
||||
!
|
||||
! convert Exception Vector to Exception Number
|
||||
!
|
||||
exception_entry:
|
||||
no = 0
|
||||
.rept 256
|
||||
mov.l r0,@-sp
|
||||
mov #no,r0
|
||||
bra exception_trampoline
|
||||
and #0xff,r0
|
||||
no = no + 1
|
||||
.endr
|
||||
exception_trampoline:
|
||||
mov.l r1,@-sp
|
||||
mov.l $exception_handler,r1
|
||||
jmp @r1
|
||||
|
||||
.align 2
|
||||
$exception_entry:
|
||||
.long exception_entry
|
||||
$exception_handler:
|
||||
.long exception_handler
|
||||
!
|
||||
! Exception Vector Base
|
||||
!
|
||||
.align 2
|
||||
ENTRY(vbr_base)
|
||||
vector = 0
|
||||
.rept 256
|
||||
.long exception_entry + vector * 8
|
||||
vector = vector + 1
|
||||
.endr
|
||||
@ -2,7 +2,7 @@
|
||||
# Makefile for the Linux/SuperH SH-3 backends.
|
||||
#
|
||||
|
||||
obj-y := ex.o probe.o
|
||||
obj-y := ex.o probe.o entry.o
|
||||
|
||||
# CPU subtype setup
|
||||
obj-$(CONFIG_CPU_SUBTYPE_SH7705) += setup-sh7705.o
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/*
|
||||
* linux/arch/sh/entry.S
|
||||
* arch/sh/kernel/entry.S
|
||||
*
|
||||
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
|
||||
* Copyright (C) 2003 - 2006 Paul Mundt
|
||||
@ -7,7 +7,6 @@
|
||||
* 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.
|
||||
*
|
||||
*/
|
||||
#include <linux/sys.h>
|
||||
#include <linux/errno.h>
|
||||
@ -81,6 +80,8 @@ OFF_TRA = (16*4+6*4)
|
||||
#define k_g_imask r6_bank /* r6_bank1 */
|
||||
#define current r7 /* r7_bank1 */
|
||||
|
||||
#include <asm/entry-macros.S>
|
||||
|
||||
/*
|
||||
* Kernel mode register usage:
|
||||
* k0 scratch
|
||||
@ -107,26 +108,6 @@ OFF_TRA = (16*4+6*4)
|
||||
! this first version depends *much* on C implementation.
|
||||
!
|
||||
|
||||
#define CLI() \
|
||||
stc sr, r0; \
|
||||
or #0xf0, r0; \
|
||||
ldc r0, sr
|
||||
|
||||
#define STI() \
|
||||
mov.l __INV_IMASK, r11; \
|
||||
stc sr, r10; \
|
||||
and r11, r10; \
|
||||
stc k_g_imask, r11; \
|
||||
or r11, r10; \
|
||||
ldc r10, sr
|
||||
|
||||
#if defined(CONFIG_PREEMPT)
|
||||
# define preempt_stop() CLI()
|
||||
#else
|
||||
# define preempt_stop()
|
||||
# define resume_kernel restore_all
|
||||
#endif
|
||||
|
||||
#if defined(CONFIG_MMU)
|
||||
.align 2
|
||||
ENTRY(tlb_miss_load)
|
||||
@ -168,7 +149,7 @@ call_dpf:
|
||||
lds r10, pr
|
||||
rts
|
||||
nop
|
||||
0: STI()
|
||||
0: sti
|
||||
mov.l 3f, r0
|
||||
mov r9, r6
|
||||
mov r8, r5
|
||||
@ -203,32 +184,6 @@ call_dae:
|
||||
2: .long do_address_error
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
|
||||
! Handle kernel debug if either kgdb (SW) or gdb-stub (FW) is present.
|
||||
! If both are configured, handle the debug traps (breakpoints) in SW,
|
||||
! but still allow BIOS traps to FW.
|
||||
|
||||
.align 2
|
||||
debug_kernel:
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS) && defined(CONFIG_SH_KGDB)
|
||||
/* Force BIOS call to FW (debug_trap put TRA in r8) */
|
||||
mov r8,r0
|
||||
shlr2 r0
|
||||
cmp/eq #0x3f,r0
|
||||
bt debug_kernel_fw
|
||||
#endif /* CONFIG_SH_STANDARD_BIOS && CONFIG_SH_KGDB */
|
||||
|
||||
debug_enter:
|
||||
#if defined(CONFIG_SH_KGDB)
|
||||
/* Jump to kgdb, pass stacked regs as arg */
|
||||
debug_kernel_sw:
|
||||
mov.l 3f, r0
|
||||
jmp @r0
|
||||
mov r15, r4
|
||||
.align 2
|
||||
3: .long kgdb_handle_exception
|
||||
#endif /* CONFIG_SH_KGDB */
|
||||
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS)
|
||||
/* Unwind the stack and jmp to the debug entry */
|
||||
debug_kernel_fw:
|
||||
@ -269,276 +224,6 @@ debug_kernel_fw:
|
||||
2: .long gdb_vbr_vector
|
||||
#endif /* CONFIG_SH_STANDARD_BIOS */
|
||||
|
||||
#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
|
||||
|
||||
|
||||
.align 2
|
||||
debug_trap:
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
|
||||
mov #OFF_SR, r0
|
||||
mov.l @(r0,r15), r0 ! get status register
|
||||
shll r0
|
||||
shll r0 ! kernel space?
|
||||
bt/s debug_kernel
|
||||
#endif
|
||||
mov.l @r15, r0 ! Restore R0 value
|
||||
mov.l 1f, r8
|
||||
jmp @r8
|
||||
nop
|
||||
|
||||
.align 2
|
||||
ENTRY(exception_error)
|
||||
!
|
||||
STI()
|
||||
mov.l 2f, r0
|
||||
jmp @r0
|
||||
nop
|
||||
|
||||
!
|
||||
.align 2
|
||||
1: .long break_point_trap_software
|
||||
2: .long do_exception_error
|
||||
|
||||
.align 2
|
||||
ret_from_exception:
|
||||
preempt_stop()
|
||||
ENTRY(ret_from_irq)
|
||||
!
|
||||
mov #OFF_SR, r0
|
||||
mov.l @(r0,r15), r0 ! get status register
|
||||
shll r0
|
||||
shll r0 ! kernel space?
|
||||
bt/s resume_kernel ! Yes, it's from kernel, go back soon
|
||||
GET_THREAD_INFO(r8)
|
||||
|
||||
#ifdef CONFIG_PREEMPT
|
||||
bra resume_userspace
|
||||
nop
|
||||
ENTRY(resume_kernel)
|
||||
mov.l @(TI_PRE_COUNT,r8), r0 ! current_thread_info->preempt_count
|
||||
tst r0, r0
|
||||
bf noresched
|
||||
need_resched:
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_NEED_RESCHED, r0 ! need_resched set?
|
||||
bt noresched
|
||||
|
||||
mov #OFF_SR, r0
|
||||
mov.l @(r0,r15), r0 ! get status register
|
||||
and #0xf0, r0 ! interrupts off (exception path)?
|
||||
cmp/eq #0xf0, r0
|
||||
bt noresched
|
||||
|
||||
mov.l 1f, r0
|
||||
mov.l r0, @(TI_PRE_COUNT,r8)
|
||||
|
||||
STI()
|
||||
mov.l 2f, r0
|
||||
jsr @r0
|
||||
nop
|
||||
mov #0, r0
|
||||
mov.l r0, @(TI_PRE_COUNT,r8)
|
||||
CLI()
|
||||
|
||||
bra need_resched
|
||||
nop
|
||||
noresched:
|
||||
bra restore_all
|
||||
nop
|
||||
|
||||
.align 2
|
||||
1: .long PREEMPT_ACTIVE
|
||||
2: .long schedule
|
||||
#endif
|
||||
|
||||
ENTRY(resume_userspace)
|
||||
! r8: current_thread_info
|
||||
CLI()
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_WORK_MASK, r0
|
||||
bt/s restore_all
|
||||
tst #_TIF_NEED_RESCHED, r0
|
||||
|
||||
.align 2
|
||||
work_pending:
|
||||
! r0: current_thread_info->flags
|
||||
! r8: current_thread_info
|
||||
! t: result of "tst #_TIF_NEED_RESCHED, r0"
|
||||
bf/s work_resched
|
||||
tst #(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), r0
|
||||
work_notifysig:
|
||||
bt/s restore_all
|
||||
mov r15, r4
|
||||
mov r12, r5 ! set arg1(save_r0)
|
||||
mov r0, r6
|
||||
mov.l 2f, r1
|
||||
mova restore_all, r0
|
||||
jmp @r1
|
||||
lds r0, pr
|
||||
work_resched:
|
||||
#ifndef CONFIG_PREEMPT
|
||||
! gUSA handling
|
||||
mov.l @(OFF_SP,r15), r0 ! get user space stack pointer
|
||||
mov r0, r1
|
||||
shll r0
|
||||
bf/s 1f
|
||||
shll r0
|
||||
bf/s 1f
|
||||
mov #OFF_PC, r0
|
||||
! SP >= 0xc0000000 : gUSA mark
|
||||
mov.l @(r0,r15), r2 ! get user space PC (program counter)
|
||||
mov.l @(OFF_R0,r15), r3 ! end point
|
||||
cmp/hs r3, r2 ! r2 >= r3?
|
||||
bt 1f
|
||||
add r3, r1 ! rewind point #2
|
||||
mov.l r1, @(r0,r15) ! reset PC to rewind point #2
|
||||
!
|
||||
1:
|
||||
#endif
|
||||
mov.l 1f, r1
|
||||
jsr @r1 ! schedule
|
||||
nop
|
||||
CLI()
|
||||
!
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_WORK_MASK, r0
|
||||
bt restore_all
|
||||
bra work_pending
|
||||
tst #_TIF_NEED_RESCHED, r0
|
||||
|
||||
.align 2
|
||||
1: .long schedule
|
||||
2: .long do_notify_resume
|
||||
|
||||
.align 2
|
||||
syscall_exit_work:
|
||||
! r0: current_thread_info->flags
|
||||
! r8: current_thread_info
|
||||
tst #_TIF_SYSCALL_TRACE, r0
|
||||
bt/s work_pending
|
||||
tst #_TIF_NEED_RESCHED, r0
|
||||
STI()
|
||||
! XXX setup arguments...
|
||||
mov.l 4f, r0 ! do_syscall_trace
|
||||
jsr @r0
|
||||
nop
|
||||
bra resume_userspace
|
||||
nop
|
||||
|
||||
.align 2
|
||||
syscall_trace_entry:
|
||||
! Yes it is traced.
|
||||
! XXX setup arguments...
|
||||
mov.l 4f, r11 ! Call do_syscall_trace which notifies
|
||||
jsr @r11 ! superior (will chomp R[0-7])
|
||||
nop
|
||||
! Reload R0-R4 from kernel stack, where the
|
||||
! parent may have modified them using
|
||||
! ptrace(POKEUSR). (Note that R0-R2 are
|
||||
! used by the system call handler directly
|
||||
! from the kernel stack anyway, so don't need
|
||||
! to be reloaded here.) This allows the parent
|
||||
! to rewrite system calls and args on the fly.
|
||||
mov.l @(OFF_R4,r15), r4 ! arg0
|
||||
mov.l @(OFF_R5,r15), r5
|
||||
mov.l @(OFF_R6,r15), r6
|
||||
mov.l @(OFF_R7,r15), r7 ! arg3
|
||||
mov.l @(OFF_R3,r15), r3 ! syscall_nr
|
||||
! Arrange for do_syscall_trace to be called
|
||||
! again as the system call returns.
|
||||
mov.l 2f, r10 ! Number of syscalls
|
||||
cmp/hs r10, r3
|
||||
bf syscall_call
|
||||
mov #-ENOSYS, r0
|
||||
bra syscall_exit
|
||||
mov.l r0, @(OFF_R0,r15) ! Return value
|
||||
|
||||
/*
|
||||
* Syscall interface:
|
||||
*
|
||||
* Syscall #: R3
|
||||
* Arguments #0 to #3: R4--R7
|
||||
* Arguments #4 to #6: R0, R1, R2
|
||||
* TRA: (number of arguments + 0x10) x 4
|
||||
*
|
||||
* This code also handles delegating other traps to the BIOS/gdb stub
|
||||
* according to:
|
||||
*
|
||||
* Trap number
|
||||
* (TRA>>2) Purpose
|
||||
* -------- -------
|
||||
* 0x0-0xf old syscall ABI
|
||||
* 0x10-0x1f new syscall ABI
|
||||
* 0x20-0xff delegated through debug_trap to BIOS/gdb stub.
|
||||
*
|
||||
* Note: When we're first called, the TRA value must be shifted
|
||||
* right 2 bits in order to get the value that was used as the "trapa"
|
||||
* argument.
|
||||
*/
|
||||
|
||||
.align 2
|
||||
.globl ret_from_fork
|
||||
ret_from_fork:
|
||||
mov.l 1f, r8
|
||||
jsr @r8
|
||||
mov r0, r4
|
||||
bra syscall_exit
|
||||
nop
|
||||
.align 2
|
||||
1: .long schedule_tail
|
||||
!
|
||||
ENTRY(system_call)
|
||||
mov.l 1f, r9
|
||||
mov.l @r9, r8 ! Read from TRA (Trap Address) Register
|
||||
!
|
||||
! Is the trap argument >= 0x20? (TRA will be >= 0x80)
|
||||
mov #0x7f, r9
|
||||
cmp/hi r9, r8
|
||||
bt/s 0f
|
||||
mov #OFF_TRA, r9
|
||||
add r15, r9
|
||||
!
|
||||
mov.l r8, @r9 ! set TRA value to tra
|
||||
STI()
|
||||
! Call the system call handler through the table.
|
||||
! First check for bad syscall number
|
||||
mov r3, r9
|
||||
mov.l 2f, r8 ! Number of syscalls
|
||||
cmp/hs r8, r9
|
||||
bf/s good_system_call
|
||||
GET_THREAD_INFO(r8)
|
||||
syscall_badsys: ! Bad syscall number
|
||||
mov #-ENOSYS, r0
|
||||
bra resume_userspace
|
||||
mov.l r0, @(OFF_R0,r15) ! Return value
|
||||
!
|
||||
0:
|
||||
bra debug_trap
|
||||
nop
|
||||
!
|
||||
good_system_call: ! Good syscall number
|
||||
mov.l @(TI_FLAGS,r8), r8
|
||||
mov #_TIF_SYSCALL_TRACE, r10
|
||||
tst r10, r8
|
||||
bf syscall_trace_entry
|
||||
!
|
||||
syscall_call:
|
||||
shll2 r9 ! x4
|
||||
mov.l 3f, r8 ! Load the address of sys_call_table
|
||||
add r8, r9
|
||||
mov.l @r9, r8
|
||||
jsr @r8 ! jump to specific syscall handler
|
||||
nop
|
||||
mov.l @(OFF_R0,r15), r12 ! save r0
|
||||
mov.l r0, @(OFF_R0,r15) ! save the return value
|
||||
!
|
||||
syscall_exit:
|
||||
CLI()
|
||||
!
|
||||
GET_THREAD_INFO(r8)
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_ALLWORK_MASK, r0
|
||||
bf syscall_exit_work
|
||||
restore_all:
|
||||
mov.l @r15+, r0
|
||||
mov.l @r15+, r1
|
||||
@ -606,7 +291,9 @@ skip_restore:
|
||||
!
|
||||
! Calculate new SR value
|
||||
mov k3, k2 ! original SR value
|
||||
mov.l 9f, k1
|
||||
mov #0xf0, k1
|
||||
extu.b k1, k1
|
||||
not k1, k1
|
||||
and k1, k2 ! Mask orignal SR value
|
||||
!
|
||||
mov k3, k0 ! Calculate IMASK-bits
|
||||
@ -632,16 +319,12 @@ skip_restore:
|
||||
nop
|
||||
|
||||
.align 2
|
||||
1: .long TRA
|
||||
2: .long NR_syscalls
|
||||
3: .long sys_call_table
|
||||
4: .long do_syscall_trace
|
||||
5: .long 0x00001000 ! DSP
|
||||
7: .long 0x30000000
|
||||
9:
|
||||
__INV_IMASK:
|
||||
.long 0xffffff0f ! ~(IMASK)
|
||||
|
||||
! common exception handler
|
||||
#include "../../entry.S"
|
||||
|
||||
! Exception Vector Base
|
||||
!
|
||||
! Should be aligned page boundary.
|
||||
@ -761,7 +444,7 @@ skip_save:
|
||||
! Save the user registers on the stack.
|
||||
mov.l k2, @-r15 ! EXPEVT
|
||||
|
||||
mov #-1, k4
|
||||
mov #-1, k4
|
||||
mov.l k4, @-r15 ! set TRA (default: -1)
|
||||
!
|
||||
sts.l macl, @-r15
|
||||
@ -2,7 +2,8 @@
|
||||
# Makefile for the Linux/SuperH SH-4 backends.
|
||||
#
|
||||
|
||||
obj-y := ex.o probe.o
|
||||
obj-y := ex.o probe.o common.o
|
||||
common-y += $(addprefix ../sh3/, entry.o)
|
||||
|
||||
obj-$(CONFIG_SH_FPU) += fpu.o
|
||||
obj-$(CONFIG_SH_STORE_QUEUES) += sq.o
|
||||
|
||||
372
arch/sh/kernel/entry-common.S
Normal file
372
arch/sh/kernel/entry-common.S
Normal file
@ -0,0 +1,372 @@
|
||||
/* $Id: entry.S,v 1.37 2004/06/11 13:02:46 doyu Exp $
|
||||
*
|
||||
* linux/arch/sh/entry.S
|
||||
*
|
||||
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
|
||||
* Copyright (C) 2003 Paul Mundt
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
*/
|
||||
|
||||
! NOTE:
|
||||
! GNU as (as of 2.9.1) changes bf/s into bt/s and bra, when the address
|
||||
! to be jumped is too far, but it causes illegal slot exception.
|
||||
|
||||
/*
|
||||
* entry.S contains the system-call and fault low-level handling routines.
|
||||
* This also contains the timer-interrupt handler, as well as all interrupts
|
||||
* and faults that can result in a task-switch.
|
||||
*
|
||||
* NOTE: This code handles signal-recognition, which happens every time
|
||||
* after a timer-interrupt and after each system call.
|
||||
*
|
||||
* NOTE: This code uses a convention that instructions in the delay slot
|
||||
* of a transfer-control instruction are indented by an extra space, thus:
|
||||
*
|
||||
* jmp @k0 ! control-transfer instruction
|
||||
* ldc k1, ssr ! delay slot
|
||||
*
|
||||
* Stack layout in 'ret_from_syscall':
|
||||
* ptrace needs to have all regs on the stack.
|
||||
* if the order here is changed, it needs to be
|
||||
* updated in ptrace.c and ptrace.h
|
||||
*
|
||||
* r0
|
||||
* ...
|
||||
* r15 = stack pointer
|
||||
* spc
|
||||
* pr
|
||||
* ssr
|
||||
* gbr
|
||||
* mach
|
||||
* macl
|
||||
* syscall #
|
||||
*
|
||||
*/
|
||||
|
||||
#if defined(CONFIG_PREEMPT)
|
||||
# define preempt_stop() cli
|
||||
#else
|
||||
# define preempt_stop()
|
||||
# define resume_kernel __restore_all
|
||||
#endif
|
||||
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
|
||||
! Handle kernel debug if either kgdb (SW) or gdb-stub (FW) is present.
|
||||
! If both are configured, handle the debug traps (breakpoints) in SW,
|
||||
! but still allow BIOS traps to FW.
|
||||
|
||||
.align 2
|
||||
debug_kernel:
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS) && defined(CONFIG_SH_KGDB)
|
||||
/* Force BIOS call to FW (debug_trap put TRA in r8) */
|
||||
mov r8,r0
|
||||
shlr2 r0
|
||||
cmp/eq #0x3f,r0
|
||||
bt debug_kernel_fw
|
||||
#endif /* CONFIG_SH_STANDARD_BIOS && CONFIG_SH_KGDB */
|
||||
|
||||
debug_enter:
|
||||
#if defined(CONFIG_SH_KGDB)
|
||||
/* Jump to kgdb, pass stacked regs as arg */
|
||||
debug_kernel_sw:
|
||||
mov.l 3f, r0
|
||||
jmp @r0
|
||||
mov r15, r4
|
||||
.align 2
|
||||
3: .long kgdb_handle_exception
|
||||
#endif /* CONFIG_SH_KGDB */
|
||||
|
||||
#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
|
||||
|
||||
|
||||
.align 2
|
||||
debug_trap:
|
||||
#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
|
||||
mov #OFF_SR, r0
|
||||
mov.l @(r0,r15), r0 ! get status register
|
||||
shll r0
|
||||
shll r0 ! kernel space?
|
||||
bt/s debug_kernel
|
||||
#endif
|
||||
mov.l @r15, r0 ! Restore R0 value
|
||||
mov.l 1f, r8
|
||||
jmp @r8
|
||||
nop
|
||||
|
||||
.align 2
|
||||
ENTRY(exception_error)
|
||||
!
|
||||
sti
|
||||
mov.l 2f, r0
|
||||
jmp @r0
|
||||
nop
|
||||
|
||||
!
|
||||
.align 2
|
||||
1: .long break_point_trap_software
|
||||
2: .long do_exception_error
|
||||
|
||||
.align 2
|
||||
ret_from_exception:
|
||||
preempt_stop()
|
||||
ENTRY(ret_from_irq)
|
||||
!
|
||||
mov #OFF_SR, r0
|
||||
mov.l @(r0,r15), r0 ! get status register
|
||||
shll r0
|
||||
shll r0 ! kernel space?
|
||||
get_current_thread_info r8, r0
|
||||
bt resume_kernel ! Yes, it's from kernel, go back soon
|
||||
|
||||
#ifdef CONFIG_PREEMPT
|
||||
bra resume_userspace
|
||||
nop
|
||||
ENTRY(resume_kernel)
|
||||
mov.l @(TI_PRE_COUNT,r8), r0 ! current_thread_info->preempt_count
|
||||
tst r0, r0
|
||||
bf noresched
|
||||
need_resched:
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_NEED_RESCHED, r0 ! need_resched set?
|
||||
bt noresched
|
||||
|
||||
mov #OFF_SR, r0
|
||||
mov.l @(r0,r15), r0 ! get status register
|
||||
and #0xf0, r0 ! interrupts off (exception path)?
|
||||
cmp/eq #0xf0, r0
|
||||
bt noresched
|
||||
|
||||
mov.l 1f, r0
|
||||
mov.l r0, @(TI_PRE_COUNT,r8)
|
||||
|
||||
sti
|
||||
mov.l 2f, r0
|
||||
jsr @r0
|
||||
nop
|
||||
mov #0, r0
|
||||
mov.l r0, @(TI_PRE_COUNT,r8)
|
||||
cli
|
||||
|
||||
bra need_resched
|
||||
nop
|
||||
noresched:
|
||||
bra __restore_all
|
||||
nop
|
||||
|
||||
.align 2
|
||||
1: .long PREEMPT_ACTIVE
|
||||
2: .long schedule
|
||||
#endif
|
||||
|
||||
ENTRY(resume_userspace)
|
||||
! r8: current_thread_info
|
||||
cli
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_WORK_MASK, r0
|
||||
bt/s __restore_all
|
||||
tst #_TIF_NEED_RESCHED, r0
|
||||
|
||||
.align 2
|
||||
work_pending:
|
||||
! r0: current_thread_info->flags
|
||||
! r8: current_thread_info
|
||||
! t: result of "tst #_TIF_NEED_RESCHED, r0"
|
||||
bf/s work_resched
|
||||
tst #(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), r0
|
||||
work_notifysig:
|
||||
bt/s __restore_all
|
||||
mov r15, r4
|
||||
mov r12, r5 ! set arg1(save_r0)
|
||||
mov r0, r6
|
||||
mov.l 2f, r1
|
||||
mov.l 3f, r0
|
||||
jmp @r1
|
||||
lds r0, pr
|
||||
work_resched:
|
||||
#ifndef CONFIG_PREEMPT
|
||||
! gUSA handling
|
||||
mov.l @(OFF_SP,r15), r0 ! get user space stack pointer
|
||||
mov r0, r1
|
||||
shll r0
|
||||
bf/s 1f
|
||||
shll r0
|
||||
bf/s 1f
|
||||
mov #OFF_PC, r0
|
||||
! SP >= 0xc0000000 : gUSA mark
|
||||
mov.l @(r0,r15), r2 ! get user space PC (program counter)
|
||||
mov.l @(OFF_R0,r15), r3 ! end point
|
||||
cmp/hs r3, r2 ! r2 >= r3?
|
||||
bt 1f
|
||||
add r3, r1 ! rewind point #2
|
||||
mov.l r1, @(r0,r15) ! reset PC to rewind point #2
|
||||
!
|
||||
1:
|
||||
#endif
|
||||
mov.l 1f, r1
|
||||
jsr @r1 ! schedule
|
||||
nop
|
||||
cli
|
||||
!
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_WORK_MASK, r0
|
||||
bt __restore_all
|
||||
bra work_pending
|
||||
tst #_TIF_NEED_RESCHED, r0
|
||||
|
||||
.align 2
|
||||
1: .long schedule
|
||||
2: .long do_notify_resume
|
||||
3: .long restore_all
|
||||
|
||||
.align 2
|
||||
syscall_exit_work:
|
||||
! r0: current_thread_info->flags
|
||||
! r8: current_thread_info
|
||||
tst #_TIF_SYSCALL_TRACE, r0
|
||||
bt/s work_pending
|
||||
tst #_TIF_NEED_RESCHED, r0
|
||||
sti
|
||||
! XXX setup arguments...
|
||||
mov.l 4f, r0 ! do_syscall_trace
|
||||
jsr @r0
|
||||
nop
|
||||
bra resume_userspace
|
||||
nop
|
||||
|
||||
.align 2
|
||||
syscall_trace_entry:
|
||||
! Yes it is traced.
|
||||
! XXX setup arguments...
|
||||
mov.l 4f, r11 ! Call do_syscall_trace which notifies
|
||||
jsr @r11 ! superior (will chomp R[0-7])
|
||||
nop
|
||||
! Reload R0-R4 from kernel stack, where the
|
||||
! parent may have modified them using
|
||||
! ptrace(POKEUSR). (Note that R0-R2 are
|
||||
! used by the system call handler directly
|
||||
! from the kernel stack anyway, so don't need
|
||||
! to be reloaded here.) This allows the parent
|
||||
! to rewrite system calls and args on the fly.
|
||||
mov.l @(OFF_R4,r15), r4 ! arg0
|
||||
mov.l @(OFF_R5,r15), r5
|
||||
mov.l @(OFF_R6,r15), r6
|
||||
mov.l @(OFF_R7,r15), r7 ! arg3
|
||||
mov.l @(OFF_R3,r15), r3 ! syscall_nr
|
||||
! Arrange for do_syscall_trace to be called
|
||||
! again as the system call returns.
|
||||
mov.l 2f, r10 ! Number of syscalls
|
||||
cmp/hs r10, r3
|
||||
bf syscall_call
|
||||
mov #-ENOSYS, r0
|
||||
bra syscall_exit
|
||||
mov.l r0, @(OFF_R0,r15) ! Return value
|
||||
|
||||
__restore_all:
|
||||
mov.l 1f,r0
|
||||
jmp @r0
|
||||
nop
|
||||
|
||||
.align 2
|
||||
1: .long restore_all
|
||||
|
||||
/*
|
||||
* Syscall interface:
|
||||
*
|
||||
* Syscall #: R3
|
||||
* Arguments #0 to #3: R4--R7
|
||||
* Arguments #4 to #6: R0, R1, R2
|
||||
* TRA: (number of arguments + 0x10) x 4
|
||||
*
|
||||
* This code also handles delegating other traps to the BIOS/gdb stub
|
||||
* according to:
|
||||
*
|
||||
* Trap number
|
||||
* (TRA>>2) Purpose
|
||||
* -------- -------
|
||||
* 0x0-0xf old syscall ABI
|
||||
* 0x10-0x1f new syscall ABI
|
||||
* 0x20-0xff delegated through debug_trap to BIOS/gdb stub.
|
||||
*
|
||||
* Note: When we're first called, the TRA value must be shifted
|
||||
* right 2 bits in order to get the value that was used as the "trapa"
|
||||
* argument.
|
||||
*/
|
||||
|
||||
.align 2
|
||||
.globl ret_from_fork
|
||||
ret_from_fork:
|
||||
mov.l 1f, r8
|
||||
jsr @r8
|
||||
mov r0, r4
|
||||
bra syscall_exit
|
||||
nop
|
||||
.align 2
|
||||
1: .long schedule_tail
|
||||
!
|
||||
ENTRY(system_call)
|
||||
#if !defined(CONFIG_CPU_SH2)
|
||||
mov.l 1f, r9
|
||||
mov.l @r9, r8 ! Read from TRA (Trap Address) Register
|
||||
#endif
|
||||
!
|
||||
! Is the trap argument >= 0x20? (TRA will be >= 0x80)
|
||||
mov #0x7f, r9
|
||||
cmp/hi r9, r8
|
||||
bt/s 0f
|
||||
mov #OFF_TRA, r9
|
||||
add r15, r9
|
||||
!
|
||||
mov.l r8, @r9 ! set TRA value to tra
|
||||
sti
|
||||
! Call the system call handler through the table.
|
||||
! First check for bad syscall number
|
||||
mov r3, r9
|
||||
mov.l 2f, r8 ! Number of syscalls
|
||||
cmp/hs r8, r9
|
||||
get_current_thread_info r8, r10
|
||||
bf good_system_call
|
||||
syscall_badsys: ! Bad syscall number
|
||||
mov #-ENOSYS, r0
|
||||
bra resume_userspace
|
||||
mov.l r0, @(OFF_R0,r15) ! Return value
|
||||
!
|
||||
0:
|
||||
bra debug_trap
|
||||
nop
|
||||
!
|
||||
good_system_call: ! Good syscall number
|
||||
mov.l @(TI_FLAGS,r8), r8
|
||||
mov #_TIF_SYSCALL_TRACE, r10
|
||||
tst r10, r8
|
||||
bf syscall_trace_entry
|
||||
!
|
||||
syscall_call:
|
||||
shll2 r9 ! x4
|
||||
mov.l 3f, r8 ! Load the address of sys_call_table
|
||||
add r8, r9
|
||||
mov.l @r9, r8
|
||||
jsr @r8 ! jump to specific syscall handler
|
||||
nop
|
||||
mov.l @(OFF_R0,r15), r12 ! save r0
|
||||
mov.l r0, @(OFF_R0,r15) ! save the return value
|
||||
!
|
||||
syscall_exit:
|
||||
cli
|
||||
!
|
||||
get_current_thread_info r8, r0
|
||||
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
|
||||
tst #_TIF_ALLWORK_MASK, r0
|
||||
bf syscall_exit_work
|
||||
bra __restore_all
|
||||
nop
|
||||
.align 2
|
||||
#if !defined(CONFIG_CPU_SH2)
|
||||
1: .long TRA
|
||||
#endif
|
||||
2: .long NR_syscalls
|
||||
3: .long sys_call_table
|
||||
4: .long do_syscall_trace
|
||||
@ -53,8 +53,10 @@ ENTRY(_stext)
|
||||
ldc r0, sr
|
||||
! Initialize global interrupt mask
|
||||
mov #0, r0
|
||||
#ifdef CONFIG_CPU_HAS_SR_RB
|
||||
ldc r0, r6_bank
|
||||
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Prefetch if possible to reduce cache miss penalty.
|
||||
*
|
||||
@ -71,8 +73,10 @@ ENTRY(_stext)
|
||||
mov #(THREAD_SIZE >> 8), r1
|
||||
shll8 r1 ! r1 = THREAD_SIZE
|
||||
sub r1, r0 !
|
||||
#ifdef CONFIG_CPU_HAS_SR_RB
|
||||
ldc r0, r7_bank ! ... and initial thread_info
|
||||
|
||||
#endif
|
||||
|
||||
! Clear BSS area
|
||||
mov.l 3f, r1
|
||||
add #4, r1
|
||||
@ -95,7 +99,11 @@ ENTRY(_stext)
|
||||
nop
|
||||
|
||||
.balign 4
|
||||
#if defined(CONFIG_CPU_SH2)
|
||||
1: .long 0x000000F0 ! IMASK=0xF
|
||||
#else
|
||||
1: .long 0x400080F0 ! MD=1, RB=0, BL=0, FD=1, IMASK=0xF
|
||||
#endif
|
||||
2: .long init_thread_union+THREAD_SIZE
|
||||
3: .long __bss_start
|
||||
4: .long _end
|
||||
|
||||
Loading…
Reference in New Issue
Block a user