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- added support for Nintendo N64

Browse Source 
- added support for Realtek RTL83XX SoCs
 - kaslr support for Loongson64
 - first steps to get rid of set_fs()
 - DMA runtime coherent/non-coherent selection cleanup
 - cleanups and fixes
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Merge tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

 - added support for Nintendo N64

 - added support for Realtek RTL83XX SoCs

 - kaslr support for Loongson64

 - first steps to get rid of set_fs()

 - DMA runtime coherent/non-coherent selection cleanup

 - cleanups and fixes

* tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (98 commits)
  Revert "MIPS: Add basic support for ptrace single step"
  vmlinux.lds.h: catch more UBSAN symbols into .data
  MIPS: kernel: Drop kgdb_call_nmi_hook
  MAINTAINERS: Add git tree for KVM/mips
  MIPS: Use common way to parse elfcorehdr
  MIPS: Simplify EVA cache handling
  Revert "MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes"
  MIPS: remove CONFIG_DMA_PERDEV_COHERENT
  MIPS: remove CONFIG_DMA_MAYBE_COHERENT
  driver core: lift dma_default_coherent into common code
  MIPS: refactor the runtime coherent vs noncoherent DMA indicators
  MIPS/alchemy: factor out the DMA coherent setup
  MIPS/malta: simplify plat_setup_iocoherency
  MIPS: Add basic support for ptrace single step
  MAINTAINERS: replace non-matching patterns for loongson{2,3}
  MIPS: Make check condition for SDBBP consistent with EJTAG spec
  mips: Replace lkml.org links with lore
  Revert "MIPS: microMIPS: Fix the judgment of mm_jr16_op and mm_jalr_op"
  MIPS: crash_dump.c: Simplify copy_oldmem_page()
  Revert "mips: Manually call fdt_init_reserved_mem() method"
  ...
This commit is contained in:
Linus Torvalds 2021-02-21 13:18:26 -08:00
commit 2671fe5e1d
139 changed files with 1591 additions and 939 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.mailmap
View File

@ -202,6 +202,7 @@ Li Yang <leoyang.li@nxp.com> <leoli@freescale.com>
Li Yang <leoyang.li@nxp.com> <leo@zh-kernel.org>
Lukasz Luba <lukasz.luba@arm.com> <l.luba@partner.samsung.com>
Maciej W. Rozycki <macro@mips.com> <macro@imgtec.com>
Maciej W. Rozycki <macro@orcam.me.uk> <macro@linux-mips.org>
Manivannan Sadhasivam <mani@kernel.org> <manivannanece23@gmail.com>
Manivannan Sadhasivam <mani@kernel.org> <manivannan.sadhasivam@linaro.org>
Marcin Nowakowski <marcin.nowakowski@mips.com> <marcin.nowakowski@imgtec.com>

32
Documentation/devicetree/bindings/mips/lantiq/lantiq,cgu.yaml Normal file
View File

@ -0,0 +1,32 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mips/lantiq/lantiq,cgu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Lantiq Xway SoC series Clock Generation Unit (CGU)
maintainers:
- John Crispin <john@phrozen.org>
properties:
compatible:
items:
- enum:
- lantiq,cgu-xway
reg:
maxItems: 1
required:
- compatible
- reg
additionalProperties: false
examples:
- |
cgu@103000 {
compatible = "lantiq,cgu-xway";
reg = <0x103000 0x1000>;
};

32
Documentation/devicetree/bindings/mips/lantiq/lantiq,dma-xway.yaml Normal file
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@ -0,0 +1,32 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mips/lantiq/lantiq,dma-xway.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Lantiq Xway SoCs DMA Controller DT bindings
maintainers:
- John Crispin <john@phrozen.org>
properties:
compatible:
items:
- enum:
- lantiq,dma-xway
reg:
maxItems: 1
required:
- compatible
- reg
additionalProperties: false
examples:
- |
dma@e104100 {
compatible = "lantiq,dma-xway";
reg = <0xe104100 0x800>;
};

32
Documentation/devicetree/bindings/mips/lantiq/lantiq,ebu.yaml Normal file
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@ -0,0 +1,32 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mips/lantiq/lantiq,ebu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Lantiq Xway SoC series External Bus Unit (EBU)
maintainers:
- John Crispin <john@phrozen.org>
properties:
compatible:
items:
- enum:
- lantiq,ebu-xway
reg:
maxItems: 1
required:
- compatible
- reg
additionalProperties: false
examples:
- |
ebu@105300 {
compatible = "lantiq,ebu-xway";
reg = <0x105300 0x100>;
};

32
Documentation/devicetree/bindings/mips/lantiq/lantiq,pmu.yaml Normal file
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@ -0,0 +1,32 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mips/lantiq/lantiq,pmu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Lantiq Xway SoC series Power Management Unit (PMU)
maintainers:
- John Crispin <john@phrozen.org>
properties:
compatible:
items:
- enum:
- lantiq,pmu-xway
reg:
maxItems: 1
required:
- compatible
- reg
additionalProperties: false
examples:
- |
pmu@102000 {
compatible = "lantiq,pmu-xway";
reg = <0x102000 0x1000>;
};

24
Documentation/devicetree/bindings/mips/realtek-rtl.yaml Normal file
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@ -0,0 +1,24 @@
# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mips/realtek-rtl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Realtek RTL83xx/93xx SoC series device tree bindings
maintainers:
- Bert Vermeulen <bert@biot.com>
- Sander Vanheule <sander@svanheule.net>
properties:
$nodename:
const: "/"
compatible:
oneOf:
# RTL8382-based boards
- items:
- enum:
- cisco,sg220-26
- const: realtek,rtl8382-soc
additionalProperties: true

2
Documentation/devicetree/bindings/vendor-prefixes.yaml
View File

@ -231,6 +231,8 @@ patternProperties:
description: Computadora Industrial Abierta Argentina
"^cirrus,.*":
description: Cirrus Logic, Inc.
"^cisco,.*":
description: Cisco Systems, Inc.
"^cloudengines,.*":
description: Cloud Engines, Inc.
"^cnm,.*":

19
MAINTAINERS
View File

@ -4914,7 +4914,7 @@ F: Documentation/networking/decnet.rst
F: net/decnet/
DECSTATION PLATFORM SUPPORT
M: "Maciej W. Rozycki" <macro@linux-mips.org>
M: "Maciej W. Rozycki" <macro@orcam.me.uk>
L: linux-mips@vger.kernel.org
S: Maintained
W: http://www.linux-mips.org/wiki/DECstation
@ -4923,12 +4923,12 @@ F: arch/mips/include/asm/dec/
F: arch/mips/include/asm/mach-dec/
DEFXX FDDI NETWORK DRIVER
M: "Maciej W. Rozycki" <macro@linux-mips.org>
M: "Maciej W. Rozycki" <macro@orcam.me.uk>
S: Maintained
F: drivers/net/fddi/defxx.*
DEFZA FDDI NETWORK DRIVER
M: "Maciej W. Rozycki" <macro@linux-mips.org>
M: "Maciej W. Rozycki" <macro@orcam.me.uk>
S: Maintained
F: drivers/net/fddi/defza.*
@ -6191,7 +6191,7 @@ F: include/linux/dim.h
F: lib/dim/
DZ DECSTATION DZ11 SERIAL DRIVER
M: "Maciej W. Rozycki" <macro@linux-mips.org>
M: "Maciej W. Rozycki" <macro@orcam.me.uk>
S: Maintained
F: drivers/tty/serial/dz.*
@ -9709,6 +9709,7 @@ M: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
L: linux-mips@vger.kernel.org
L: kvm@vger.kernel.org
S: Maintained
T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
F: arch/mips/include/asm/kvm*
F: arch/mips/include/uapi/asm/kvm*
F: arch/mips/kvm/
@ -11878,8 +11879,7 @@ L: linux-mips@vger.kernel.org
S: Maintained
F: arch/mips/include/asm/mach-loongson2ef/
F: arch/mips/loongson2ef/
F: drivers/*/*/*loongson2*
F: drivers/*/*loongson2*
F: drivers/cpufreq/loongson2_cpufreq.c
MIPS/LOONGSON64 ARCHITECTURE
M: Huacai Chen <chenhuacai@kernel.org>
@ -11888,8 +11888,6 @@ L: linux-mips@vger.kernel.org
S: Maintained
F: arch/mips/include/asm/mach-loongson64/
F: arch/mips/loongson64/
F: drivers/*/*/*loongson3*
F: drivers/*/*loongson3*
F: drivers/irqchip/irq-loongson*
F: drivers/platform/mips/cpu_hwmon.c
@ -14064,7 +14062,6 @@ L: linux-mips@vger.kernel.org
S: Odd Fixes
F: arch/mips/boot/dts/img/pistachio*
F: arch/mips/configs/pistachio*_defconfig
F: arch/mips/include/asm/mach-pistachio/
F: arch/mips/pistachio/
PKTCDVD DRIVER
@ -18082,7 +18079,7 @@ F: Documentation/networking/tuntap.rst
F: arch/um/os-Linux/drivers/
TURBOCHANNEL SUBSYSTEM
M: "Maciej W. Rozycki" <macro@linux-mips.org>
M: "Maciej W. Rozycki" <macro@orcam.me.uk>
M: Ralf Baechle <ralf@linux-mips.org>
L: linux-mips@vger.kernel.org
S: Maintained
@ -19715,7 +19712,7 @@ F: Documentation/admin-guide/blockdev/zram.rst
F: drivers/block/zram/
ZS DECSTATION Z85C30 SERIAL DRIVER
M: "Maciej W. Rozycki" <macro@linux-mips.org>
M: "Maciej W. Rozycki" <macro@orcam.me.uk>
S: Maintained
F: drivers/tty/serial/zs.*

1
arch/mips/Kbuild.platforms
View File

@ -18,6 +18,7 @@ platform-$(CONFIG_MACH_LOONGSON2EF) += loongson2ef/
platform-$(CONFIG_MACH_LOONGSON32) += loongson32/
platform-$(CONFIG_MACH_LOONGSON64) += loongson64/
platform-$(CONFIG_MIPS_MALTA) += mti-malta/
platform-$(CONFIG_MACH_NINTENDO64) += n64/
platform-$(CONFIG_NLM_COMMON) += netlogic/
platform-$(CONFIG_PIC32MZDA) += pic32/
platform-$(CONFIG_MACH_PISTACHIO) += pistachio/

69
arch/mips/Kconfig
View File

@ -18,6 +18,7 @@ config MIPS
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_WANT_LD_ORPHAN_WARN
select BUILDTIME_TABLE_SORT
select CLONE_BACKWARDS
select CPU_NO_EFFICIENT_FFS if (TARGET_ISA_REV < 1)
@ -42,7 +43,7 @@ config MIPS
select HANDLE_DOMAIN_IRQ
select HAVE_ARCH_COMPILER_H
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_KGDB
select HAVE_ARCH_KGDB if MIPS_FP_SUPPORT
select HAVE_ARCH_MMAP_RND_BITS if MMU
select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT
select HAVE_ARCH_SECCOMP_FILTER
@ -75,6 +76,8 @@ config MIPS
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_NMI
select HAVE_PERF_EVENTS
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RSEQ
select HAVE_SPARSE_SYSCALL_NR
@ -123,6 +126,7 @@ choice
config MIPS_GENERIC_KERNEL
bool "Generic board-agnostic MIPS kernel"
select ARCH_HAS_SETUP_DMA_OPS
select MIPS_GENERIC
select BOOT_RAW
select BUILTIN_DTB
@ -132,7 +136,7 @@ config MIPS_GENERIC_KERNEL
select CPU_MIPSR2_IRQ_EI
select CPU_MIPSR2_IRQ_VI
select CSRC_R4K
select DMA_PERDEV_COHERENT
select DMA_NONCOHERENT
select HAVE_PCI
select IRQ_MIPS_CPU
select MIPS_AUTO_PFN_OFFSET
@ -181,7 +185,7 @@ config MIPS_ALCHEMY
select CEVT_R4K
select CSRC_R4K
select IRQ_MIPS_CPU
select DMA_MAYBE_COHERENT # Au1000,1500,1100 aren't, rest is
select DMA_NONCOHERENT # Au1000,1500,1100 aren't, rest is
select MIPS_FIXUP_BIGPHYS_ADDR if PCI
select SYS_HAS_CPU_MIPS32_R1
select SYS_SUPPORTS_32BIT_KERNEL
@ -408,6 +412,7 @@ config MACH_JAZZ
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_100HZ
select SYS_SUPPORTS_LITTLE_ENDIAN
help
This a family of machines based on the MIPS R4030 chipset which was
used by several vendors to build RISC/os and Windows NT workstations.
@ -491,8 +496,6 @@ config MACH_LOONGSON64
select SYS_SUPPORTS_ZBOOT
select SYS_SUPPORTS_RELOCATABLE
select ZONE_DMA32
select NUMA
select SMP
select COMMON_CLK
select USE_OF
select BUILTIN_DTB
@ -546,7 +549,7 @@ config MIPS_MALTA
select CLKSRC_MIPS_GIC
select COMMON_CLK
select CSRC_R4K
select DMA_MAYBE_COHERENT
select DMA_NONCOHERENT
select GENERIC_ISA_DMA
select HAVE_PCSPKR_PLATFORM
select HAVE_PCI
@ -608,6 +611,18 @@ config MACH_VR41XX
select SYS_SUPPORTS_MIPS16
select GPIOLIB
config MACH_NINTENDO64
bool "Nintendo 64 console"
select CEVT_R4K
select CSRC_R4K
select SYS_HAS_CPU_R4300
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_ZBOOT
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select DMA_NONCOHERENT
select IRQ_MIPS_CPU
config RALINK
bool "Ralink based machines"
select CEVT_R4K
@ -627,6 +642,27 @@ config RALINK
select ARCH_HAS_RESET_CONTROLLER
select RESET_CONTROLLER
config MACH_REALTEK_RTL
bool "Realtek RTL838x/RTL839x based machines"
select MIPS_GENERIC
select DMA_NONCOHERENT
select IRQ_MIPS_CPU
select CSRC_R4K
select CEVT_R4K
select SYS_HAS_CPU_MIPS32_R1
select SYS_HAS_CPU_MIPS32_R2
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_MIPS16
select SYS_SUPPORTS_MULTITHREADING
select SYS_SUPPORTS_VPE_LOADER
select SYS_HAS_EARLY_PRINTK
select SYS_HAS_EARLY_PRINTK_8250
select USE_GENERIC_EARLY_PRINTK_8250
select BOOT_RAW
select PINCTRL
select USE_OF
config SGI_IP22
bool "SGI IP22 (Indy/Indigo2)"
select ARC_MEMORY
@ -1127,11 +1163,6 @@ config FW_CFE
config ARCH_SUPPORTS_UPROBES
bool
config DMA_MAYBE_COHERENT
select ARCH_HAS_DMA_COHERENCE_H
select DMA_NONCOHERENT
bool
config DMA_PERDEV_COHERENT
bool
select ARCH_HAS_SETUP_DMA_OPS
@ -1258,9 +1289,6 @@ config SYS_SUPPORTS_HUGETLBFS
config MIPS_HUGE_TLB_SUPPORT
def_bool HUGETLB_PAGE || TRANSPARENT_HUGEPAGE
config IRQ_CPU_RM7K
bool
config IRQ_MSP_SLP
bool
@ -1664,6 +1692,15 @@ config CPU_VR41XX
kernel built with this option will not run on any other type of
processor or vice versa.
config CPU_R4300
bool "R4300"
depends on SYS_HAS_CPU_R4300
select CPU_SUPPORTS_32BIT_KERNEL
select CPU_SUPPORTS_64BIT_KERNEL
select CPU_HAS_LOAD_STORE_LR
help
MIPS Technologies R4300-series processors.
config CPU_R4X00
bool "R4x00"
depends on SYS_HAS_CPU_R4X00
@ -1998,6 +2035,9 @@ config SYS_HAS_CPU_TX39XX
config SYS_HAS_CPU_VR41XX
bool
config SYS_HAS_CPU_R4300
bool
config SYS_HAS_CPU_R4X00
bool
@ -2758,6 +2798,7 @@ config ARCH_SPARSEMEM_ENABLE
config NUMA
bool "NUMA Support"
depends on SYS_SUPPORTS_NUMA
select SMP
help
Say Y to compile the kernel to support NUMA (Non-Uniform Memory
Access). This option improves performance on systems with more

20
arch/mips/Makefile
View File

@ -136,11 +136,31 @@ cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
#
cflags-y += -fno-stack-check
# binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
# for a description).
#
# We disable this in order to prevent the assembler meddling with the
# instruction that labels refer to, ie. if we label an ll instruction:
#
# 1: ll v0, 0(a0)
#
# ...then with the assembler fix applied the label may actually point at a sync
# instruction inserted by the assembler, and if we were using the label in an
# exception table the table would no longer contain the address of the ll
# instruction.
#
# Avoid this by explicitly disabling that assembler behaviour.
#
cflags-y += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
#
# CPU-dependent compiler/assembler options for optimization.
#
cflags-$(CONFIG_CPU_R3000) += -march=r3000
cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
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

4
arch/mips/alchemy/common/prom.c
View File

@ -143,7 +143,3 @@ int __init prom_get_ethernet_addr(char *ethernet_addr)
return 0;
}
void __init prom_free_prom_memory(void)
{
}

34
arch/mips/alchemy/common/setup.c
View File

@ -28,8 +28,8 @@
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/dma-map-ops.h> /* for dma_default_coherent */
#include <asm/dma-coherence.h>
#include <asm/mipsregs.h>
#include <au1000.h>
@ -37,6 +37,23 @@
extern void __init board_setup(void);
extern void __init alchemy_set_lpj(void);
static bool alchemy_dma_coherent(void)
{
switch (alchemy_get_cputype()) {
case ALCHEMY_CPU_AU1000:
case ALCHEMY_CPU_AU1500:
case ALCHEMY_CPU_AU1100:
return false;
case ALCHEMY_CPU_AU1200:
/* Au1200 AB USB does not support coherent memory */
if ((read_c0_prid() & PRID_REV_MASK) == 0)
return false;
return true;
default:
return true;
}
}
void __init plat_mem_setup(void)
{
alchemy_set_lpj();
@ -48,20 +65,7 @@ void __init plat_mem_setup(void)
/* Clear to obtain best system bus performance */
clear_c0_config(1 << 19); /* Clear Config[OD] */
hw_coherentio = 0;
coherentio = IO_COHERENCE_ENABLED;
switch (alchemy_get_cputype()) {
case ALCHEMY_CPU_AU1000:
case ALCHEMY_CPU_AU1500:
case ALCHEMY_CPU_AU1100:
coherentio = IO_COHERENCE_DISABLED;
break;
case ALCHEMY_CPU_AU1200:
/* Au1200 AB USB does not support coherent memory */
if (0 == (read_c0_prid() & PRID_REV_MASK))
coherentio = IO_COHERENCE_DISABLED;
break;
}
dma_default_coherent = alchemy_dma_coherent();
board_setup(); /* board specific setup */

5
arch/mips/ar7/memory.c
View File

@ -49,8 +49,3 @@ void __init prom_meminit(void)
pages = memsize() >> PAGE_SHIFT;
memblock_add(PHYS_OFFSET, pages << PAGE_SHIFT);
}
void __init prom_free_prom_memory(void)
{
/* Nothing to free */
}

4
arch/mips/ath25/prom.c
View File

@ -20,7 +20,3 @@
void __init prom_init(void)
{
}
void __init prom_free_prom_memory(void)
{
}

5
arch/mips/ath79/prom.c
View File

@ -32,8 +32,3 @@ void __init prom_init(void)
}
#endif
}
void __init prom_free_prom_memory(void)
{
/* We do not have to prom memory to free */
}

13
arch/mips/ath79/setup.c
View File

@ -213,16 +213,17 @@ unsigned int get_c0_compare_int(void)
void __init plat_mem_setup(void)
{
unsigned long fdt_start;
void *dtb;
set_io_port_base(KSEG1);
/* Get the position of the FDT passed by the bootloader */
fdt_start = fw_getenvl("fdt_start");
if (fdt_start)
__dt_setup_arch((void *)KSEG0ADDR(fdt_start));
else if (fw_passed_dtb)
__dt_setup_arch((void *)KSEG0ADDR(fw_passed_dtb));
dtb = (void *)fw_getenvl("fdt_start");
if (dtb == NULL)
dtb = get_fdt();
if (dtb)
__dt_setup_arch((void *)KSEG0ADDR(dtb));
ath79_reset_base = ioremap(AR71XX_RESET_BASE,
AR71XX_RESET_SIZE);

4
arch/mips/bcm47xx/prom.c
View File

@ -113,10 +113,6 @@ void __init prom_init(void)
setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0);
}
void __init prom_free_prom_memory(void)
{
}
#if defined(CONFIG_BCM47XX_BCMA) && defined(CONFIG_HIGHMEM)
#define EXTVBASE 0xc0000000

4
arch/mips/bcm63xx/prom.c
View File

@ -94,7 +94,3 @@ void __init prom_init(void)
*/
}
}
void __init prom_free_prom_memory(void)
{
}

11
arch/mips/bmips/setup.c
View File

@ -129,10 +129,6 @@ void __init prom_init(void)
register_bmips_smp_ops();
}
void __init prom_free_prom_memory(void)
{
}
const char *get_system_type(void)
{
return "Generic BMIPS kernel";
@ -165,11 +161,10 @@ void __init plat_mem_setup(void)
/* intended to somewhat resemble ARM; see Documentation/arm/booting.rst */
if (fw_arg0 == 0 && fw_arg1 == 0xffffffff)
dtb = phys_to_virt(fw_arg2);
else if (fw_passed_dtb) /* UHI interface or appended dtb */
dtb = (void *)fw_passed_dtb;
else if (__dtb_start != __dtb_end)
dtb = (void *)__dtb_start;
else
dtb = get_fdt();
if (!dtb)
panic("no dtb found");
__dt_setup_arch(dtb);

1
arch/mips/boot/compressed/Makefile
View File

@ -37,6 +37,7 @@ KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
GCOV_PROFILE := n
UBSAN_SANITIZE := n
# decompressor objects (linked with vmlinuz)
vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o

20
arch/mips/boot/compressed/head.S
View File

@ -15,10 +15,7 @@
#include <asm/asm.h>
#include <asm/regdef.h>
.set noreorder
.cprestore
LEAF(start)
start:
/* Save boot rom start args */
move s0, a0
move s1, a1
@ -29,27 +26,26 @@ start:
PTR_LA a0, _edata
PTR_LA a2, _end
1: sw zero, 0(a0)
addiu a0, a0, 4
bne a2, a0, 1b
addiu a0, a0, 4
PTR_LA a0, (.heap) /* heap address */
PTR_LA sp, (.stack + 8192) /* stack address */
PTR_LA ra, 2f
PTR_LA k0, decompress_kernel
jr k0
nop
PTR_LA t9, decompress_kernel
jalr t9
2:
move a0, s0
move a1, s1
move a2, s2
move a3, s3
PTR_LI k0, KERNEL_ENTRY
jr k0
nop
PTR_LI t9, KERNEL_ENTRY
jalr t9
3:
b 3b
nop
END(start)
.comm .heap,BOOT_HEAP_SIZE,4

1
arch/mips/boot/dts/Makefile
View File

@ -14,6 +14,7 @@ subdir-$(CONFIG_FIT_IMAGE_FDT_NI169445) += ni
subdir-$(CONFIG_MACH_PIC32) += pic32
subdir-$(CONFIG_ATH79) += qca
subdir-$(CONFIG_RALINK) += ralink
subdir-$(CONFIG_MACH_REALTEK_RTL) += realtek
subdir-$(CONFIG_FIT_IMAGE_FDT_XILFPGA) += xilfpga
obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y))

2
arch/mips/boot/dts/realtek/Makefile Normal file
View File

@ -0,0 +1,2 @@
# SPDX-License-Identifier: GPL-2.0
dtb-y += cisco_sg220-26.dtb

25
arch/mips/boot/dts/realtek/cisco_sg220-26.dts Normal file
View File

@ -0,0 +1,25 @@
// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
/dts-v1/;
#include "rtl83xx.dtsi"
#include "rtl838x.dtsi"
/ {
model = "Cisco SG220-26";
compatible = "cisco,sg220-26", "realtek,rtl8382-soc";
chosen {
stdout-path = "serial0:9600n8";
bootargs = "earlycon console=ttyS0,9600";
};
memory@0 {
device_type = "memory";
reg = <0x0 0x8000000>;
};
};
&uart0 {
status = "okay";
};

21
arch/mips/boot/dts/realtek/rtl838x.dtsi Normal file
View File

@ -0,0 +1,21 @@
// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
/ {
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu@0 {
compatible = "mips,mips4KEc";
reg = <0>;
clocks = <&baseclk 0>;
clock-names = "cpu";
};
};
baseclk: baseclk {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <500000000>;
};
};

59
arch/mips/boot/dts/realtek/rtl83xx.dtsi Normal file
View File

@ -0,0 +1,59 @@
// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
/ {
#address-cells = <1>;
#size-cells = <1>;
aliases {
serial0 = &uart0;
serial1 = &uart1;
};
cpuintc: cpuintc {
compatible = "mti,cpu-interrupt-controller";
#address-cells = <0>;
#interrupt-cells = <1>;
interrupt-controller;
};
soc: soc {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x18000000 0x10000>;
uart0: uart@2000 {
compatible = "ns16550a";
reg = <0x2000 0x100>;
clock-frequency = <200000000>;
interrupt-parent = <&cpuintc>;
interrupts = <31>;
reg-io-width = <1>;
reg-shift = <2>;
fifo-size = <1>;
no-loopback-test;
status = "disabled";
};
uart1: uart@2100 {
compatible = "ns16550a";
reg = <0x2100 0x100>;
clock-frequency = <200000000>;
interrupt-parent = <&cpuintc>;
interrupts = <30>;
reg-io-width = <1>;
reg-shift = <2>;
fifo-size = <1>;
no-loopback-test;
status = "disabled";
};
};
};

9
arch/mips/cavium-octeon/setup.c
View File

@ -1149,12 +1149,15 @@ void __init device_tree_init(void)
bool do_prune;
bool fill_mac;
if (fw_passed_dtb) {
fdt = (void *)fw_passed_dtb;
#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
if (!fdt_check_header(&__appended_dtb)) {
fdt = &__appended_dtb;
do_prune = false;
fill_mac = true;
pr_info("Using appended Device Tree.\n");
} else if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
} else
#endif
if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
if (fdt_check_header(fdt))
panic("Corrupt Device Tree passed to kernel.");

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

@ -117,8 +117,3 @@ void __init prom_init(void)
setup_8250_early_printk_port(CKSEG1ADDR(0x1c800000), 0, 0);
}
void __init prom_free_prom_memory(void)
{
/* Nothing to do! */
}

2
arch/mips/configs/loongson3_defconfig
View File

@ -31,6 +31,8 @@ CONFIG_PERF_EVENTS=y
CONFIG_MACH_LOONGSON64=y
CONFIG_CPU_HAS_MSA=y
CONFIG_NR_CPUS=16
CONFIG_NUMA=y
CONFIG_SMP=y
CONFIG_HZ_256=y
CONFIG_KEXEC=y
CONFIG_MIPS32_O32=y

2
arch/mips/fw/arc/memory.c
View File

@ -173,7 +173,7 @@ void __weak __init prom_cleanup(void)
{
}
void __weak __init prom_free_prom_memory(void)
void __init prom_free_prom_memory(void)
{
int i;

4
arch/mips/fw/sni/sniprom.c
View File

@ -87,10 +87,6 @@ void *prom_get_hwconf(void)
return (void *)CKSEG1ADDR(hwconf);
}
void __init prom_free_prom_memory(void)
{
}
/*
* /proc/cpuinfo system type
*

9
arch/mips/generic/init.c
View File

@ -39,14 +39,13 @@ void __init *plat_get_fdt(void)
/* Already set up */
return (void *)fdt;
if (fw_passed_dtb && !fdt_check_header((void *)fw_passed_dtb)) {
fdt = (void *)get_fdt();
if (fdt && !fdt_check_header(fdt)) {
/*
* We have been provided with the appropriate device tree for
* the board. Make use of it & search for any machine struct
* based upon the root compatible string.
*/
fdt = (void *)fw_passed_dtb;
for_each_mips_machine(check_mach) {
match = mips_machine_is_compatible(check_mach, fdt);
if (match) {
@ -202,7 +201,3 @@ void __init arch_init_irq(void)
irqchip_init();
}
void __init prom_free_prom_memory(void)
{
}

4
arch/mips/include/asm/Kbuild
View File

@ -4,6 +4,10 @@ generated-y += syscall_table_32_o32.h
generated-y += syscall_table_64_n32.h
generated-y += syscall_table_64_n64.h
generated-y += syscall_table_64_o32.h
generated-y += unistd_nr_n32.h
generated-y += unistd_nr_n64.h
generated-y += unistd_nr_o32.h
generic-y += export.h
generic-y += kvm_para.h
generic-y += mcs_spinlock.h

18
arch/mips/include/asm/asm.h
View File

@ -20,10 +20,27 @@
#include <asm/sgidefs.h>
#include <asm/asm-eva.h>
#ifndef __VDSO__
/*
* Emit CFI data in .debug_frame sections, not .eh_frame sections.
* We don't do DWARF unwinding at runtime, so only the offline DWARF
* information is useful to anyone. Note we should change this if we
* ever decide to enable DWARF unwinding at runtime.
*/
#define CFI_SECTIONS .cfi_sections .debug_frame
#else
/*
* For the vDSO, emit both runtime unwind information and debug
* symbols for the .dbg file.
*/
#define CFI_SECTIONS
#endif
/*
* LEAF - declare leaf routine
*/
#define LEAF(symbol) \
CFI_SECTIONS; \
.globl symbol; \
.align 2; \
.type symbol, @function; \
@ -36,6 +53,7 @@ symbol: .frame sp, 0, ra; \
* NESTED - declare nested routine entry point
*/
#define NESTED(symbol, framesize, rpc) \
CFI_SECTIONS; \
.globl symbol; \
.align 2; \
.type symbol, @function; \

2
arch/mips/include/asm/atomic.h
View File

@ -248,7 +248,7 @@ static __inline__ int pfx##_sub_if_positive(type i, pfx##_t * v) \
* bltz that can branch to code outside of the LL/SC loop. As \
* such, we don't need to emit another barrier here. \
*/ \
if (!__SYNC_loongson3_war) \
if (__SYNC_loongson3_war == 0) \
smp_mb__after_atomic(); \
\
return result; \

12
arch/mips/include/asm/bitops.h
View File

@ -26,7 +26,7 @@
#include <asm/war.h>
#define __bit_op(mem, insn, inputs...) do { \
unsigned long temp; \
unsigned long __temp; \
\
asm volatile( \
" .set push \n" \
@ -37,13 +37,13 @@
" " __SC "%0, %1 \n" \
" " __SC_BEQZ "%0, 1b \n" \
" .set pop \n" \
: "=&r"(temp), "+" GCC_OFF_SMALL_ASM()(mem) \
: "=&r"(__temp), "+" GCC_OFF_SMALL_ASM()(mem) \
: inputs \
: __LLSC_CLOBBER); \
} while (0)
#define __test_bit_op(mem, ll_dst, insn, inputs...) ({ \
unsigned long orig, temp; \
unsigned long __orig, __temp; \
\
asm volatile( \
" .set push \n" \
@ -54,12 +54,12 @@
" " __SC "%1, %2 \n" \
" " __SC_BEQZ "%1, 1b \n" \
" .set pop \n" \
: "=&r"(orig), "=&r"(temp), \
: "=&r"(__orig), "=&r"(__temp), \
"+" GCC_OFF_SMALL_ASM()(mem) \
: inputs \
: __LLSC_CLOBBER); \
\
orig; \
__orig; \
})
/*
@ -435,7 +435,7 @@ static inline int fls(unsigned int x)
*
* This is defined the same way as
* the libc and compiler builtin ffs routines, therefore
* differs in spirit from the above ffz (man ffs).
* differs in spirit from the below ffz (man ffs).
*/
static inline int ffs(int word)
{

22
arch/mips/include/asm/bootinfo.h
View File

@ -112,7 +112,27 @@ extern char arcs_cmdline[COMMAND_LINE_SIZE];
extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
#ifdef CONFIG_USE_OF
extern unsigned long fw_passed_dtb;
#include <linux/libfdt.h>
#include <linux/of_fdt.h>
extern char __appended_dtb[];
static inline void *get_fdt(void)
{
if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) ||
IS_ENABLED(CONFIG_MIPS_ELF_APPENDED_DTB))
if (fdt_magic(&__appended_dtb) == FDT_MAGIC)
return &__appended_dtb;
if (fw_arg0 == -2) /* UHI interface */
return (void *)fw_arg1;
if (IS_ENABLED(CONFIG_BUILTIN_DTB))
if (&__dtb_start != &__dtb_end)
return &__dtb_start;
return NULL;
}
#endif
/*

6
arch/mips/include/asm/checksum.h
View File

@ -130,6 +130,8 @@ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
__u32 len, __u8 proto,
__wsum sum)
{
unsigned long tmp = (__force unsigned long)sum;
__asm__(
" .set push # csum_tcpudp_nofold\n"
" .set noat \n"
@ -157,7 +159,7 @@ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
" addu %0, $1 \n"
#endif
" .set pop"
: "=r" (sum)
: "=r" (tmp)
: "0" ((__force unsigned long)daddr),
"r" ((__force unsigned long)saddr),
#ifdef __MIPSEL__
@ -167,7 +169,7 @@ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
#endif
"r" ((__force unsigned long)sum));
return sum;
return (__force __wsum)tmp;
}
#define csum_tcpudp_nofold csum_tcpudp_nofold

6
arch/mips/include/asm/cmpxchg.h
View File

@ -99,7 +99,7 @@ unsigned long __xchg(volatile void *ptr, unsigned long x, int size)
* contains a completion barrier prior to the LL, so we don't \
* need to emit an extra one here. \
*/ \
if (!__SYNC_loongson3_war) \
if (__SYNC_loongson3_war == 0) \
smp_mb__before_llsc(); \
\
__res = (__typeof__(*(ptr))) \
@ -191,7 +191,7 @@ unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
* contains a completion barrier prior to the LL, so we don't \
* need to emit an extra one here. \
*/ \
if (!__SYNC_loongson3_war) \
if (__SYNC_loongson3_war == 0) \
smp_mb__before_llsc(); \
\
__res = cmpxchg_local((ptr), (old), (new)); \
@ -201,7 +201,7 @@ unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
* contains a completion barrier after the SC, so we don't \
* need to emit an extra one here. \
*/ \
if (!__SYNC_loongson3_war) \
if (__SYNC_loongson3_war == 0) \
smp_llsc_mb(); \
\
__res; \

5
arch/mips/include/asm/cpu-type.h
View File

@ -122,6 +122,11 @@ static inline int __pure __get_cpu_type(const int cpu_type)
case CPU_VR4181A:
#endif
#ifdef CONFIG_SYS_HAS_CPU_R4300
case CPU_R4300:
case CPU_R4310:
#endif
#ifdef CONFIG_SYS_HAS_CPU_R4X00
case CPU_R4000PC:
case CPU_R4000SC:

2
arch/mips/include/asm/cpu.h
View File

@ -302,7 +302,7 @@ enum cpu_type_enum {
/*
* R4000 class processors
*/
CPU_R4000PC, CPU_R4000SC, CPU_R4000MC, CPU_R4200,
CPU_R4000PC, CPU_R4000SC, CPU_R4000MC, CPU_R4200, CPU_R4300, CPU_R4310,
CPU_R4400PC, CPU_R4400SC, CPU_R4400MC, CPU_R4600, CPU_R4640, CPU_R4650,
CPU_R4700, CPU_R5000, CPU_R5500, CPU_NEVADA, CPU_R10000,
CPU_R12000, CPU_R14000, CPU_R16000, CPU_VR41XX, CPU_VR4111, CPU_VR4121,

38
arch/mips/include/asm/dma-coherence.h
View File

@ -1,38 +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) 2006 Ralf Baechle <ralf@linux-mips.org>
*
*/
#ifndef __ASM_DMA_COHERENCE_H
#define __ASM_DMA_COHERENCE_H
enum coherent_io_user_state {
IO_COHERENCE_DEFAULT,
IO_COHERENCE_ENABLED,
IO_COHERENCE_DISABLED,
};
#if defined(CONFIG_DMA_PERDEV_COHERENT)
/* Don't provide (hw_)coherentio to avoid misuse */
#elif defined(CONFIG_DMA_MAYBE_COHERENT)
extern enum coherent_io_user_state coherentio;
extern int hw_coherentio;
static inline bool dev_is_dma_coherent(struct device *dev)
{
return coherentio == IO_COHERENCE_ENABLED ||
(coherentio == IO_COHERENCE_DEFAULT && hw_coherentio);
}
#else
#ifdef CONFIG_DMA_NONCOHERENT
#define coherentio IO_COHERENCE_DISABLED
#else
#define coherentio IO_COHERENCE_ENABLED
#endif
#define hw_coherentio 0
#endif /* CONFIG_DMA_MAYBE_COHERENT */
#endif

6
arch/mips/include/asm/inst.h
View File

@ -65,11 +65,11 @@
#define I_FR_SFT 21
#define MIPSInst_FR(x) ((MIPSInst(x) & 0x03e00000) >> I_FR_SFT)
#define I_FMA_FUNC_SFT 2
#define MIPSInst_FMA_FUNC(x) ((MIPSInst(x) & 0x0000003c) >> I_FMA_FUNC_SFT)
#define I_FMA_FUNC_SFT 3
#define MIPSInst_FMA_FUNC(x) ((MIPSInst(x) & 0x00000038) >> I_FMA_FUNC_SFT)
#define I_FMA_FFMT_SFT 0
#define MIPSInst_FMA_FFMT(x) (MIPSInst(x) & 0x00000003)
#define MIPSInst_FMA_FFMT(x) (MIPSInst(x) & 0x00000007)
typedef unsigned int mips_instruction;

1
arch/mips/include/asm/irq.h
View File

@ -20,6 +20,7 @@
#define IRQ_STACK_SIZE THREAD_SIZE
#define IRQ_STACK_START (IRQ_STACK_SIZE - 16)
extern void __init init_IRQ(void);
extern void *irq_stack[NR_CPUS];
/*

2
arch/mips/include/asm/irq_cpu.h
View File

@ -10,8 +10,6 @@
#define _ASM_IRQ_CPU_H
extern void mips_cpu_irq_init(void);
extern void rm7k_cpu_irq_init(void);
extern void rm9k_cpu_irq_init(void);
#ifdef CONFIG_IRQ_DOMAIN
struct device_node;

6
arch/mips/include/asm/mach-generic/irq.h
View File

@ -28,12 +28,6 @@
#endif /* CONFIG_I8259 */
#endif
#ifdef CONFIG_IRQ_CPU_RM7K
#ifndef RM7K_CPU_IRQ_BASE
#define RM7K_CPU_IRQ_BASE (MIPS_CPU_IRQ_BASE+8)
#endif
#endif
#endif /* CONFIG_IRQ_MIPS_CPU */
#endif /* __ASM_MACH_GENERIC_IRQ_H */

2
arch/mips/include/asm/mach-loongson64/loongson.h
View File

@ -23,8 +23,8 @@ extern u32 memsize, highmemsize;
extern const struct plat_smp_ops loongson3_smp_ops;
/* loongson-specific command line, env and memory initialization */
extern void __init prom_init_memory(void);
extern void __init prom_init_env(void);
extern void __init szmem(unsigned int node);
extern void *loongson_fdt_blob;
/* irq operation functions */

9
arch/mips/include/asm/mach-n64/irq.h Normal file
View File

@ -0,0 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_MACH_N64_IRQ_H
#define __ASM_MACH_N64_IRQ_H
#define NR_IRQS 8
#include <asm/mach-generic/irq.h>
#endif /* __ASM_MACH_N64_IRQ_H */

8
arch/mips/include/asm/mach-n64/kmalloc.h Normal file
View File

@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_MACH_N64_KMALLOC_H
#define __ASM_MACH_N64_KMALLOC_H
/* The default of 128 bytes wastes too much, use 32 (the largest cacheline, I) */
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
#endif /* __ASM_MACH_N64_KMALLOC_H */

15
arch/mips/include/asm/mach-pistachio/irq.h
View File

@ -1,15 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Pistachio IRQ setup
*
* Copyright (C) 2014 Google, Inc.
*/
#ifndef __ASM_MACH_PISTACHIO_IRQ_H
#define __ASM_MACH_PISTACHIO_IRQ_H
#define NR_IRQS 256
#include <asm/mach-generic/irq.h>
#endif /* __ASM_MACH_PISTACHIO_IRQ_H */

4
arch/mips/include/asm/mipsregs.h
View File

@ -1085,6 +1085,10 @@
#define CVMVMCONF_RMMUSIZEM1_S 0
#define CVMVMCONF_RMMUSIZEM1 (_U64CAST_(0xff) << CVMVMCONF_RMMUSIZEM1_S)
/* Debug register field definitions */
#define MIPS_DEBUG_DBP_SHIFT 1
#define MIPS_DEBUG_DBP (_ULCAST_(1) << MIPS_DEBUG_DBP_SHIFT)
/*
* Coprocessor 1 (FPU) register names
*/

1
arch/mips/include/asm/octeon/octeon.h
View File

@ -282,7 +282,6 @@ union octeon_cvmemctl {
extern void octeon_check_cpu_bist(void);
int octeon_prune_device_tree(void);
extern const char __appended_dtb;
extern const char __dtb_octeon_3xxx_begin;
extern const char __dtb_octeon_68xx_begin;

17
arch/mips/include/asm/page.h
View File

@ -202,14 +202,13 @@ static inline unsigned long ___pa(unsigned long x)
/*
* RELOC_HIDE was originally added by 6007b903dfe5f1d13e0c711ac2894bdd4a61b1ad
* (lmo) rsp. 8431fd094d625b94d364fe393076ccef88e6ce18 (kernel.org). The
* discussion can be found in lkml posting
* <a2ebde260608230500o3407b108hc03debb9da6e62c@mail.gmail.com> which is
* archived at http://lists.linuxcoding.com/kernel/2006-q3/msg17360.html
* discussion can be found in
* https://lore.kernel.org/lkml/a2ebde260608230500o3407b108hc03debb9da6e62c@mail.gmail.com
*
* It is unclear if the misscompilations mentioned in
* http://lkml.org/lkml/2010/8/8/138 also affect MIPS so we keep this one
* until GCC 3.x has been retired before we can apply
* https://patchwork.linux-mips.org/patch/1541/
* https://lore.kernel.org/lkml/1281303490-390-1-git-send-email-namhyung@gmail.com
* also affect MIPS so we keep this one until GCC 3.x has been retired
* before we can apply https://patchwork.linux-mips.org/patch/1541/
*/
#ifndef __pa_symbol
@ -255,6 +254,12 @@ extern bool __virt_addr_valid(const volatile void *kaddr);
#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC
extern unsigned long __kaslr_offset;
static inline unsigned long kaslr_offset(void)
{
return __kaslr_offset;
}
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>

14
arch/mips/include/asm/pgtable.h
View File

@ -64,6 +64,7 @@ struct vm_area_struct;
#define __S111 __pgprot(0)
extern unsigned long _page_cachable_default;
extern void __update_cache(unsigned long address, pte_t pte);
/*
* ZERO_PAGE is a global shared page that is always zero; used
@ -94,31 +95,31 @@ extern void paging_init(void);
#define htw_stop() \
do { \
unsigned long flags; \
unsigned long __flags; \
\
if (cpu_has_htw) { \
local_irq_save(flags); \
local_irq_save(__flags); \
if(!raw_current_cpu_data.htw_seq++) { \
write_c0_pwctl(read_c0_pwctl() & \
~(1 << MIPS_PWCTL_PWEN_SHIFT)); \
back_to_back_c0_hazard(); \
} \
local_irq_restore(flags); \
local_irq_restore(__flags); \
} \
} while(0)
#define htw_start() \
do { \
unsigned long flags; \
unsigned long __flags; \
\
if (cpu_has_htw) { \
local_irq_save(flags); \
local_irq_save(__flags); \
if (!--raw_current_cpu_data.htw_seq) { \
write_c0_pwctl(read_c0_pwctl() | \
(1 << MIPS_PWCTL_PWEN_SHIFT)); \
back_to_back_c0_hazard(); \
} \
local_irq_restore(flags); \
local_irq_restore(__flags); \
} \
} while(0)
@ -224,7 +225,6 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pteval)
{
extern void __update_cache(unsigned long address, pte_t pte);
if (!pte_present(pteval))
goto cache_sync_done;

2
arch/mips/include/asm/ptrace.h
View File

@ -53,7 +53,7 @@ struct pt_regs {
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
return regs->regs[31];
return regs->regs[29];
}
static inline void instruction_pointer_set(struct pt_regs *regs,

97
arch/mips/include/asm/r4kcache.h
View File

@ -23,7 +23,6 @@
#include <asm/mipsmtregs.h>
#include <asm/mmzone.h>
#include <asm/unroll.h>
#include <linux/uaccess.h> /* for uaccess_kernel() */
extern void (*r4k_blast_dcache)(void);
extern void (*r4k_blast_icache)(void);
@ -102,30 +101,9 @@ static inline void flush_scache_line(unsigned long addr)
cache_op(Hit_Writeback_Inv_SD, addr);
}
#define protected_cache_op(op,addr) \
({ \
int __err = 0; \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set "MIPS_ISA_ARCH_LEVEL" \n" \
"1: cache %1, (%2) \n" \
"2: .insn \n" \
" .set pop \n" \
" .section .fixup,\"ax\" \n" \
"3: li %0, %3 \n" \
" j 2b \n" \
" .previous \n" \
" .section __ex_table,\"a\" \n" \
" "STR(PTR)" 1b, 3b \n" \
" .previous" \
: "+r" (__err) \
: "i" (op), "r" (addr), "i" (-EFAULT)); \
__err; \
})
#ifdef CONFIG_EVA
#define protected_cachee_op(op,addr) \
#define protected_cache_op(op, addr) \
({ \
int __err = 0; \
__asm__ __volatile__( \
@ -147,6 +125,30 @@ static inline void flush_scache_line(unsigned long addr)
: "i" (op), "r" (addr), "i" (-EFAULT)); \
__err; \
})
#else
#define protected_cache_op(op, addr) \
({ \
int __err = 0; \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set "MIPS_ISA_ARCH_LEVEL" \n" \
"1: cache %1, (%2) \n" \
"2: .insn \n" \
" .set pop \n" \
" .section .fixup,\"ax\" \n" \
"3: li %0, %3 \n" \
" j 2b \n" \
" .previous \n" \
" .section __ex_table,\"a\" \n" \
" "STR(PTR)" 1b, 3b \n" \
" .previous" \
: "+r" (__err) \
: "i" (op), "r" (addr), "i" (-EFAULT)); \
__err; \
})
#endif
/*
* The next two are for badland addresses like signal trampolines.
@ -158,11 +160,7 @@ static inline int protected_flush_icache_line(unsigned long addr)
return protected_cache_op(Hit_Invalidate_I_Loongson2, addr);
default:
#ifdef CONFIG_EVA
return protected_cachee_op(Hit_Invalidate_I, addr);
#else
return protected_cache_op(Hit_Invalidate_I, addr);
#endif
}
}
@ -174,20 +172,12 @@ static inline int protected_flush_icache_line(unsigned long addr)
*/
static inline int protected_writeback_dcache_line(unsigned long addr)
{
#ifdef CONFIG_EVA
return protected_cachee_op(Hit_Writeback_Inv_D, addr);
#else
return protected_cache_op(Hit_Writeback_Inv_D, addr);
#endif
}
static inline int protected_writeback_scache_line(unsigned long addr)
{
#ifdef CONFIG_EVA
return protected_cachee_op(Hit_Writeback_Inv_SD, addr);
#else
return protected_cache_op(Hit_Writeback_Inv_SD, addr);
#endif
}
/*
@ -307,43 +297,8 @@ static inline void prot##extra##blast_##pfx##cache##_range(unsigned long start,
} \
}
#ifndef CONFIG_EVA
__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, )
__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_, )
#else
#define __BUILD_PROT_BLAST_CACHE_RANGE(pfx, desc, hitop) \
static inline void protected_blast_##pfx##cache##_range(unsigned long start,\
unsigned long end) \
{ \
unsigned long lsize = cpu_##desc##_line_size(); \
unsigned long addr = start & ~(lsize - 1); \
unsigned long aend = (end - 1) & ~(lsize - 1); \
\
if (!uaccess_kernel()) { \
while (1) { \
protected_cachee_op(hitop, addr); \
if (addr == aend) \
break; \
addr += lsize; \
} \
} else { \
while (1) { \
protected_cache_op(hitop, addr); \
if (addr == aend) \
break; \
addr += lsize; \
} \
\
} \
}
__BUILD_PROT_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D)
__BUILD_PROT_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I)
#endif
__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_, )
__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I_Loongson2, \
protected_, loongson2_)

2
arch/mips/include/asm/spram.h
View File

@ -5,7 +5,7 @@
#if defined(CONFIG_MIPS_SPRAM)
extern __init void spram_config(void);
#else
static inline void spram_config(void) { };
static inline void spram_config(void) { }
#endif /* CONFIG_MIPS_SPRAM */
#endif /* _MIPS_SPRAM_H */

1
arch/mips/include/asm/traps.h
View File

@ -24,6 +24,7 @@ extern void (*board_ebase_setup)(void);
extern void (*board_cache_error_setup)(void);
extern int register_nmi_notifier(struct notifier_block *nb);
extern char except_vec_nmi[];
#define nmi_notifier(fn, pri) \
({ \

2
arch/mips/include/asm/vermagic.h
View File

@ -26,6 +26,8 @@
#define MODULE_PROC_FAMILY "TX39XX "
#elif defined CONFIG_CPU_VR41XX
#define MODULE_PROC_FAMILY "VR41XX "
#elif defined CONFIG_CPU_R4300
#define MODULE_PROC_FAMILY "R4300 "
#elif defined CONFIG_CPU_R4X00
#define MODULE_PROC_FAMILY "R4X00 "
#elif defined CONFIG_CPU_TX49XX

3
arch/mips/include/asm/vpe.h
View File

@ -26,7 +26,6 @@
#endif
#define MAX_VPES 16
#define VPE_PATH_MAX 256
static inline int aprp_cpu_index(void)
{
@ -62,7 +61,6 @@ struct vpe {
unsigned long len;
char *pbuffer;
unsigned long plen;
char cwd[VPE_PATH_MAX];
unsigned long __start;
@ -111,7 +109,6 @@ extern const struct file_operations vpe_fops;
int vpe_notify(int index, struct vpe_notifications *notify);
void *vpe_get_shared(int index);
char *vpe_getcwd(int index);
struct vpe *get_vpe(int minor);
struct tc *get_tc(int index);

3
arch/mips/include/uapi/asm/Kbuild
View File

@ -2,8 +2,5 @@
generated-y += unistd_n32.h
generated-y += unistd_n64.h
generated-y += unistd_o32.h
generated-y += unistd_nr_n32.h
generated-y += unistd_nr_n64.h
generated-y += unistd_nr_o32.h
generic-y += kvm_para.h

40
arch/mips/include/uapi/asm/perf_regs.h Normal file
View File

@ -0,0 +1,40 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_MIPS_PERF_REGS_H
#define _ASM_MIPS_PERF_REGS_H
enum perf_event_mips_regs {
PERF_REG_MIPS_PC,
PERF_REG_MIPS_R1,
PERF_REG_MIPS_R2,
PERF_REG_MIPS_R3,
PERF_REG_MIPS_R4,
PERF_REG_MIPS_R5,
PERF_REG_MIPS_R6,
PERF_REG_MIPS_R7,
PERF_REG_MIPS_R8,
PERF_REG_MIPS_R9,
PERF_REG_MIPS_R10,
PERF_REG_MIPS_R11,
PERF_REG_MIPS_R12,
PERF_REG_MIPS_R13,
PERF_REG_MIPS_R14,
PERF_REG_MIPS_R15,
PERF_REG_MIPS_R16,
PERF_REG_MIPS_R17,
PERF_REG_MIPS_R18,
PERF_REG_MIPS_R19,
PERF_REG_MIPS_R20,
PERF_REG_MIPS_R21,
PERF_REG_MIPS_R22,
PERF_REG_MIPS_R23,
PERF_REG_MIPS_R24,
PERF_REG_MIPS_R25,
PERF_REG_MIPS_R26,
PERF_REG_MIPS_R27,
PERF_REG_MIPS_R28,
PERF_REG_MIPS_R29,
PERF_REG_MIPS_R30,
PERF_REG_MIPS_R31,
PERF_REG_MIPS_MAX = PERF_REG_MIPS_R31 + 1,
};
#endif /* _ASM_MIPS_PERF_REGS_H */

3
arch/mips/jazz/Kconfig
View File

@ -3,7 +3,6 @@ config ACER_PICA_61
bool "Support for Acer PICA 1 chipset"
depends on MACH_JAZZ
select DMA_NONCOHERENT
select SYS_SUPPORTS_LITTLE_ENDIAN
help
This is a machine with a R4400 133/150 MHz CPU. To compile a Linux
kernel that runs on these, say Y here. For details about Linux on
@ -15,7 +14,6 @@ config MIPS_MAGNUM_4000
depends on MACH_JAZZ
select DMA_NONCOHERENT
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_LITTLE_ENDIAN
help
This is a machine with a R4000 100 MHz CPU. To compile a Linux
kernel that runs on these, say Y here. For details about Linux on
@ -26,7 +24,6 @@ config OLIVETTI_M700
bool "Support for Olivetti M700-10"
depends on MACH_JAZZ
select DMA_NONCOHERENT
select SYS_SUPPORTS_LITTLE_ENDIAN
help
This is a machine with a R4000 100 MHz CPU. To compile a Linux
kernel that runs on these, say Y here. For details about Linux on

3
arch/mips/kernel/Makefile
View File

@ -71,7 +71,6 @@ obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
obj-$(CONFIG_MIPS_VPE_APSP_API_CMP) += rtlx-cmp.o
obj-$(CONFIG_MIPS_VPE_APSP_API_MT) += rtlx-mt.o
obj-$(CONFIG_IRQ_CPU_RM7K) += irq-rm7000.o
obj-$(CONFIG_MIPS_MSC) += irq-msc01.o
obj-$(CONFIG_IRQ_TXX9) += irq_txx9.o
obj-$(CONFIG_IRQ_GT641XX) += irq-gt641xx.o
@ -104,7 +103,7 @@ obj-$(CONFIG_MIPSR2_TO_R6_EMULATOR) += mips-r2-to-r6-emul.o
CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -x c /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
obj-$(CONFIG_PERF_EVENTS) += perf_event.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_regs.o
obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_mipsxx.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o

30
arch/mips/kernel/cacheinfo.c
View File

@ -35,6 +35,11 @@ static int __init_cache_level(unsigned int cpu)
leaves += (c->icache.waysize) ? 2 : 1;
if (c->vcache.waysize) {
levels++;
leaves++;
}
if (c->scache.waysize) {
levels++;
leaves++;
@ -74,25 +79,36 @@ static int __populate_cache_leaves(unsigned int cpu)
struct cpuinfo_mips *c = &current_cpu_data;
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
struct cacheinfo *this_leaf = this_cpu_ci->info_list;
int level = 1;
if (c->icache.waysize) {
/* L1 caches are per core */
/* I/D caches are per core */
fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
populate_cache(dcache, this_leaf, 1, CACHE_TYPE_DATA);
populate_cache(dcache, this_leaf, level, CACHE_TYPE_DATA);
fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
populate_cache(icache, this_leaf, 1, CACHE_TYPE_INST);
populate_cache(icache, this_leaf, level, CACHE_TYPE_INST);
level++;
} else {
populate_cache(dcache, this_leaf, 1, CACHE_TYPE_UNIFIED);
populate_cache(dcache, this_leaf, level, CACHE_TYPE_UNIFIED);
level++;
}
if (c->vcache.waysize) {
/* Vcache is per core as well */
fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
populate_cache(vcache, this_leaf, level, CACHE_TYPE_UNIFIED);
level++;
}
if (c->scache.waysize) {
/* L2 cache is per cluster */
/* Scache is per cluster */
fill_cpumask_cluster(cpu, &this_leaf->shared_cpu_map);
populate_cache(scache, this_leaf, 2, CACHE_TYPE_UNIFIED);
populate_cache(scache, this_leaf, level, CACHE_TYPE_UNIFIED);
level++;
}
if (c->tcache.waysize)
populate_cache(tcache, this_leaf, 3, CACHE_TYPE_UNIFIED);
populate_cache(tcache, this_leaf, level, CACHE_TYPE_UNIFIED);
this_cpu_ci->cpu_map_populated = true;

2
arch/mips/kernel/cevt-txx9.c
View File

@ -193,7 +193,7 @@ void __init txx9_clockevent_init(unsigned long baseaddr, int irq,
cd->min_delta_ns = clockevent_delta2ns(0xf, cd);
cd->min_delta_ticks = 0xf;
cd->irq = irq;
cd->cpumask = cpumask_of(0),
cd->cpumask = cpumask_of(0);
clockevents_register_device(cd);
if (request_irq(irq, txx9tmr_interrupt, IRQF_PERCPU | IRQF_TIMER,
"txx9tmr", &txx9_clock_event_device))

1
arch/mips/kernel/cps-vec.S
View File

@ -91,7 +91,6 @@
.set pop
.endm
.section .text.cps-vec
.balign 0x1000
LEAF(mips_cps_core_entry)

24
arch/mips/kernel/cpu-probe.c
View File

@ -1154,6 +1154,15 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
break;
}
break;
case PRID_IMP_R4300:
c->cputype = CPU_R4300;
__cpu_name[cpu] = "R4300";
set_isa(c, MIPS_CPU_ISA_III);
c->fpu_msk31 |= FPU_CSR_CONDX;
c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
MIPS_CPU_LLSC;
c->tlbsize = 32;
break;
case PRID_IMP_R4600:
c->cputype = CPU_R4600;
__cpu_name[cpu] = "R4600";
@ -1830,16 +1839,17 @@ static inline void cpu_probe_ingenic(struct cpuinfo_mips *c, unsigned int cpu)
*/
case PRID_COMP_INGENIC_D0:
c->isa_level &= ~MIPS_CPU_ISA_M32R2;
break;
fallthrough;
/*
* The config0 register in the XBurst CPUs with a processor ID of
* PRID_COMP_INGENIC_D1 has an abandoned huge page tlb mode, this
* mode is not compatible with the MIPS standard, it will cause
* tlbmiss and into an infinite loop (line 21 in the tlb-funcs.S)
* when starting the init process. After chip reset, the default
* is HPTLB mode, Write 0xa9000000 to cp0 register 5 sel 4 to
* switch back to VTLB mode to prevent getting stuck.
* PRID_COMP_INGENIC_D0 or PRID_COMP_INGENIC_D1 has an abandoned
* huge page tlb mode, this mode is not compatible with the MIPS
* standard, it will cause tlbmiss and into an infinite loop
* (line 21 in the tlb-funcs.S) when starting the init process.
* After chip reset, the default is HPTLB mode, Write 0xa9000000
* to cp0 register 5 sel 4 to switch back to VTLB mode to prevent
* getting stuck.
*/
case PRID_COMP_INGENIC_D1:
write_c0_page_ctrl(XBURST_PAGECTRL_HPTLB_DIS);

41
arch/mips/kernel/crash_dump.c
View File

@ -1,11 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/highmem.h>
#include <linux/memblock.h>
#include <linux/crash_dump.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
static void *kdump_buf_page;
/**
* copy_oldmem_page - copy one page from "oldmem"
@ -19,10 +14,6 @@ static void *kdump_buf_page;
*
* Copy a page from "oldmem". For this page, there is no pte mapped
* in the current kernel.
*
* Calling copy_to_user() in atomic context is not desirable. Hence first
* copying the data to a pre-allocated kernel page and then copying to user
* space in non-atomic context.
*/
ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
size_t csize, unsigned long offset, int userbuf)
@ -32,36 +23,16 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
if (!csize)
return 0;
vaddr = kmap_atomic_pfn(pfn);
vaddr = kmap_local_pfn(pfn);
if (!userbuf) {
memcpy(buf, (vaddr + offset), csize);
kunmap_atomic(vaddr);
memcpy(buf, vaddr + offset, csize);
} else {
if (!kdump_buf_page) {
pr_warn("Kdump: Kdump buffer page not allocated\n");
return -EFAULT;
}
copy_page(kdump_buf_page, vaddr);
kunmap_atomic(vaddr);
if (copy_to_user(buf, (kdump_buf_page + offset), csize))
return -EFAULT;
if (copy_to_user(buf, vaddr + offset, csize))
csize = -EFAULT;
}
kunmap_local(vaddr);
return csize;
}
static int __init kdump_buf_page_init(void)
{
int ret = 0;
kdump_buf_page = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!kdump_buf_page) {
pr_warn("Kdump: Failed to allocate kdump buffer page\n");
ret = -ENOMEM;
}
return ret;
}
arch_initcall(kdump_buf_page_init);

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

@ -73,7 +73,6 @@ static inline void ftrace_dyn_arch_init_insns(void)
static int ftrace_modify_code(unsigned long ip, unsigned int new_code)
{
int faulted;
mm_segment_t old_fs;
/* *(unsigned int *)ip = new_code; */
safe_store_code(new_code, ip, faulted);
@ -81,10 +80,7 @@ static int ftrace_modify_code(unsigned long ip, unsigned int new_code)
if (unlikely(faulted))
return -EFAULT;
old_fs = get_fs();
set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8);
set_fs(old_fs);
return 0;
}

4
arch/mips/kernel/genex.S
View File

@ -349,8 +349,8 @@ NESTED(ejtag_debug_handler, PT_SIZE, sp)
MTC0 k0, CP0_DESAVE
mfc0 k0, CP0_DEBUG
sll k0, k0, 30 # Check for SDBBP.
bgez k0, ejtag_return
andi k0, k0, MIPS_DEBUG_DBP # Check for SDBBP.
beqz k0, ejtag_return
#ifdef CONFIG_SMP
1: PTR_LA k0, ejtag_debug_buffer_spinlock

31
arch/mips/kernel/head.S
View File

@ -93,33 +93,6 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
jr t0
0:
#ifdef CONFIG_USE_OF
#if defined(CONFIG_MIPS_RAW_APPENDED_DTB) || \
defined(CONFIG_MIPS_ELF_APPENDED_DTB)
PTR_LA t2, __appended_dtb
#ifdef CONFIG_CPU_BIG_ENDIAN
li t1, 0xd00dfeed
#else /* !CONFIG_CPU_BIG_ENDIAN */
li t1, 0xedfe0dd0
#endif /* !CONFIG_CPU_BIG_ENDIAN */
lw t0, (t2)
beq t0, t1, dtb_found
#endif /* CONFIG_MIPS_RAW_APPENDED_DTB || CONFIG_MIPS_ELF_APPENDED_DTB */
li t1, -2
move t2, a1
beq a0, t1, dtb_found
#ifdef CONFIG_BUILTIN_DTB
PTR_LA t2, __dtb_start
PTR_LA t1, __dtb_end
bne t1, t2, dtb_found
#endif /* CONFIG_BUILTIN_DTB */
li t2, 0
dtb_found:
#endif /* CONFIG_USE_OF */
PTR_LA t0, __bss_start # clear .bss
LONG_S zero, (t0)
PTR_LA t1, __bss_stop - LONGSIZE
@ -133,10 +106,6 @@ dtb_found:
LONG_S a2, fw_arg2
LONG_S a3, fw_arg3
#ifdef CONFIG_USE_OF
LONG_S t2, fw_passed_dtb
#endif
MTC0 zero, CP0_CONTEXT # clear context register
#ifdef CONFIG_64BIT
MTC0 zero, CP0_XCONTEXT

1
arch/mips/kernel/idle.c
View File

@ -151,6 +151,7 @@ void __init check_wait(void)
cpu_wait = r39xx_wait;
break;
case CPU_R4200:
/* case CPU_R4300: */
case CPU_R4600:
case CPU_R4640:
case CPU_R4650:

45
arch/mips/kernel/irq-rm7000.c
View File

@ -1,45 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2003 Ralf Baechle
*
* Handler for RM7000 extended interrupts. These are a non-standard
* feature so we handle them separately from standard interrupts.
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
static inline void unmask_rm7k_irq(struct irq_data *d)
{
set_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
}
static inline void mask_rm7k_irq(struct irq_data *d)
{
clear_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
}
static struct irq_chip rm7k_irq_controller = {
.name = "RM7000",
.irq_ack = mask_rm7k_irq,
.irq_mask = mask_rm7k_irq,
.irq_mask_ack = mask_rm7k_irq,
.irq_unmask = unmask_rm7k_irq,
.irq_eoi = unmask_rm7k_irq
};
void __init rm7k_cpu_irq_init(void)
{
int base = RM7K_CPU_IRQ_BASE;
int i;
clear_c0_intcontrol(0x00000f00); /* Mask all */
for (i = base; i < base + 4; i++)
irq_set_chip_and_handler(i, &rm7k_irq_controller,
handle_percpu_irq);
}

23
arch/mips/kernel/kgdb.c
View File

@ -32,7 +32,6 @@
#include <asm/cacheflush.h>
#include <asm/processor.h>
#include <asm/sigcontext.h>
#include <linux/uaccess.h>
#include <asm/irq_regs.h>
static struct hard_trap_info {
@ -208,18 +207,6 @@ void arch_kgdb_breakpoint(void)
".set\treorder");
}
void kgdb_call_nmi_hook(void *ignored)
{
mm_segment_t old_fs;
old_fs = get_fs();
set_fs(KERNEL_DS);
kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
set_fs(old_fs);
}
static int compute_signal(int tt)
{
struct hard_trap_info *ht;
@ -302,7 +289,6 @@ static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
struct die_args *args = (struct die_args *)ptr;
struct pt_regs *regs = args->regs;
int trap = (regs->cp0_cause & 0x7c) >> 2;
mm_segment_t old_fs;
#ifdef CONFIG_KPROBES
/*
@ -317,17 +303,11 @@ static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
if (user_mode(regs))
return NOTIFY_DONE;
/* Kernel mode. Set correct address limit */
old_fs = get_fs();
set_fs(KERNEL_DS);
if (atomic_read(&kgdb_active) != -1)
kgdb_nmicallback(smp_processor_id(), regs);
if (kgdb_handle_exception(trap, compute_signal(trap), cmd, regs)) {
set_fs(old_fs);
if (kgdb_handle_exception(trap, compute_signal(trap), cmd, regs))
return NOTIFY_DONE;
}
if (atomic_read(&kgdb_setting_breakpoint))
if ((trap == 9) && (regs->cp0_epc == (unsigned long)breakinst))
@ -337,7 +317,6 @@ static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
local_irq_enable();
__flush_cache_all();
set_fs(old_fs);
return NOTIFY_STOP;
}

107
arch/mips/kernel/module.c
View File

@ -40,22 +40,13 @@ void *module_alloc(unsigned long size)
}
#endif
static int apply_r_mips_none(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
{
return 0;
}
static int apply_r_mips_32(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static void apply_r_mips_32(u32 *location, u32 base, Elf_Addr v)
{
*location = base + v;
return 0;
}
static int apply_r_mips_26(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_26(struct module *me, u32 *location, u32 base,
Elf_Addr v)
{
if (v % 4) {
pr_err("module %s: dangerous R_MIPS_26 relocation\n",
@ -75,8 +66,8 @@ static int apply_r_mips_26(struct module *me, u32 *location,
return 0;
}
static int apply_r_mips_hi16(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_hi16(struct module *me, u32 *location, Elf_Addr v,
bool rela)
{
struct mips_hi16 *n;
@ -217,26 +208,25 @@ static int apply_r_mips_pc(struct module *me, u32 *location, u32 base,
return 0;
}
static int apply_r_mips_pc16(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_pc16(struct module *me, u32 *location, u32 base,
Elf_Addr v)
{
return apply_r_mips_pc(me, location, base, v, 16);
}
static int apply_r_mips_pc21(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_pc21(struct module *me, u32 *location, u32 base,
Elf_Addr v)
{
return apply_r_mips_pc(me, location, base, v, 21);
}
static int apply_r_mips_pc26(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_pc26(struct module *me, u32 *location, u32 base,
Elf_Addr v)
{
return apply_r_mips_pc(me, location, base, v, 26);
}
static int apply_r_mips_64(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_64(u32 *location, Elf_Addr v, bool rela)
{
if (WARN_ON(!rela))
return -EINVAL;
@ -246,8 +236,7 @@ static int apply_r_mips_64(struct module *me, u32 *location,
return 0;
}
static int apply_r_mips_higher(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_higher(u32 *location, Elf_Addr v, bool rela)
{
if (WARN_ON(!rela))
return -EINVAL;
@ -258,8 +247,7 @@ static int apply_r_mips_higher(struct module *me, u32 *location,
return 0;
}
static int apply_r_mips_highest(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela)
static int apply_r_mips_highest(u32 *location, Elf_Addr v, bool rela)
{
if (WARN_ON(!rela))
return -EINVAL;
@ -272,12 +260,14 @@ static int apply_r_mips_highest(struct module *me, u32 *location,
/**
* reloc_handler() - Apply a particular relocation to a module
* @type: type of the relocation to apply
* @me: the module to apply the reloc to
* @location: the address at which the reloc is to be applied
* @base: the existing value at location for REL-style; 0 for RELA-style
* @v: the value of the reloc, with addend for RELA-style
* @rela: indication of is this a RELA (true) or REL (false) relocation
*
* Each implemented reloc_handler function applies a particular type of
* Each implemented relocation function applies a particular type of
* relocation to the module @me. Relocs that may be found in either REL or RELA
* variants can be handled by making use of the @base & @v parameters which are
* set to values which abstract the difference away from the particular reloc
@ -285,23 +275,40 @@ static int apply_r_mips_highest(struct module *me, u32 *location,
*
* Return: 0 upon success, else -ERRNO
*/
typedef int (*reloc_handler)(struct module *me, u32 *location,
u32 base, Elf_Addr v, bool rela);
static int reloc_handler(u32 type, struct module *me, u32 *location, u32 base,
Elf_Addr v, bool rela)
{
switch (type) {
case R_MIPS_NONE:
break;
case R_MIPS_32:
apply_r_mips_32(location, base, v);
break;
case R_MIPS_26:
return apply_r_mips_26(me, location, base, v);
case R_MIPS_HI16:
return apply_r_mips_hi16(me, location, v, rela);
case R_MIPS_LO16:
return apply_r_mips_lo16(me, location, base, v, rela);
case R_MIPS_PC16:
return apply_r_mips_pc16(me, location, base, v);
case R_MIPS_PC21_S2:
return apply_r_mips_pc21(me, location, base, v);
case R_MIPS_PC26_S2:
return apply_r_mips_pc26(me, location, base, v);
case R_MIPS_64:
return apply_r_mips_64(location, v, rela);
case R_MIPS_HIGHER:
return apply_r_mips_higher(location, v, rela);
case R_MIPS_HIGHEST:
return apply_r_mips_highest(location, v, rela);
default:
pr_err("%s: Unknown relocation type %u\n", me->name, type);
return -EINVAL;
}
/* The handlers for known reloc types */
static reloc_handler reloc_handlers[] = {
[R_MIPS_NONE] = apply_r_mips_none,
[R_MIPS_32] = apply_r_mips_32,
[R_MIPS_26] = apply_r_mips_26,
[R_MIPS_HI16] = apply_r_mips_hi16,
[R_MIPS_LO16] = apply_r_mips_lo16,
[R_MIPS_PC16] = apply_r_mips_pc16,
[R_MIPS_64] = apply_r_mips_64,
[R_MIPS_HIGHER] = apply_r_mips_higher,
[R_MIPS_HIGHEST] = apply_r_mips_highest,
[R_MIPS_PC21_S2] = apply_r_mips_pc21,
[R_MIPS_PC26_S2] = apply_r_mips_pc26,
};
return 0;
}
static int __apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
unsigned int symindex, unsigned int relsec,
@ -311,7 +318,6 @@ static int __apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
Elf_Mips_Rel *rel;
Elf_Mips_Rela *rela;
} r;
reloc_handler handler;
Elf_Sym *sym;
u32 *location, base;
unsigned int i, type;
@ -343,17 +349,6 @@ static int __apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
}
type = ELF_MIPS_R_TYPE(*r.rel);
if (type < ARRAY_SIZE(reloc_handlers))
handler = reloc_handlers[type];
else
handler = NULL;
if (!handler) {
pr_err("%s: Unknown relocation type %u\n",
me->name, type);
err = -EINVAL;
goto out;
}
if (rela) {
v = sym->st_value + r.rela->r_addend;
@ -365,7 +360,7 @@ static int __apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
r.rel = &r.rel[1];
}
err = handler(me, location, base, v, rela);
err = reloc_handler(type, me, location, base, v, rela);
if (err)
goto out;
}

22
arch/mips/kernel/perf_event_mipsxx.c
View File

@ -1919,19 +1919,22 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
static const struct mips_perf_event *octeon_pmu_map_raw_event(u64 config)
{
unsigned int raw_id = config & 0xff;
unsigned int base_id = raw_id & 0x7f;
unsigned int base_id = config & 0x7f;
unsigned int event_max;
raw_event.cntr_mask = CNTR_ALL;
raw_event.event_id = base_id;
if (current_cpu_type() == CPU_CAVIUM_OCTEON2) {
if (base_id > 0x42)
return ERR_PTR(-EOPNOTSUPP);
} else {
if (base_id > 0x3a)
return ERR_PTR(-EOPNOTSUPP);
if (current_cpu_type() == CPU_CAVIUM_OCTEON3)
event_max = 0x5f;
else if (current_cpu_type() == CPU_CAVIUM_OCTEON2)
event_max = 0x42;
else
event_max = 0x3a;
if (base_id > event_max) {
return ERR_PTR(-EOPNOTSUPP);
}
switch (base_id) {
@ -1941,7 +1944,7 @@ static const struct mips_perf_event *octeon_pmu_map_raw_event(u64 config)
case 0x1f:
case 0x2f:
case 0x34:
case 0x3b ... 0x3f:
case 0x3e ... 0x3f:
return ERR_PTR(-EOPNOTSUPP);
default:
break;
@ -2077,6 +2080,7 @@ init_hw_perf_events(void)
case CPU_CAVIUM_OCTEON:
case CPU_CAVIUM_OCTEON_PLUS:
case CPU_CAVIUM_OCTEON2:
case CPU_CAVIUM_OCTEON3:
mipspmu.name = "octeon";
mipspmu.general_event_map = &octeon_event_map;
mipspmu.cache_event_map = &octeon_cache_map;

68
arch/mips/kernel/perf_regs.c Normal file
View File

@ -0,0 +1,68 @@
// SPDX-License-Identifier: GPL-2.0
/*
* 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.
*
* Some parts derived from x86 version of this file.
*
* Copyright (C) 2013 Cavium, Inc.
*/
#include <linux/perf_event.h>
#include <asm/ptrace.h>
#ifdef CONFIG_32BIT
u64 perf_reg_abi(struct task_struct *tsk)
{
return PERF_SAMPLE_REGS_ABI_32;
}
#else /* Must be CONFIG_64BIT */
u64 perf_reg_abi(struct task_struct *tsk)
{
if (test_tsk_thread_flag(tsk, TIF_32BIT_REGS))
return PERF_SAMPLE_REGS_ABI_32;
else
return PERF_SAMPLE_REGS_ABI_64;
}
#endif /* CONFIG_32BIT */
int perf_reg_validate(u64 mask)
{
if (!mask)
return -EINVAL;
if (mask & ~((1ull << PERF_REG_MIPS_MAX) - 1))
return -EINVAL;
return 0;
}
u64 perf_reg_value(struct pt_regs *regs, int idx)
{
long v;
switch (idx) {
case PERF_REG_MIPS_PC:
v = regs->cp0_epc;
break;
case PERF_REG_MIPS_R1 ... PERF_REG_MIPS_R25:
v = regs->regs[idx - PERF_REG_MIPS_R1 + 1];
break;
case PERF_REG_MIPS_R28 ... PERF_REG_MIPS_R31:
v = regs->regs[idx - PERF_REG_MIPS_R28 + 28];
break;
default:
WARN_ON_ONCE(1);
return 0;
}
return (s64)v; /* Sign extend if 32-bit. */
}
void perf_get_regs_user(struct perf_regs *regs_user,
struct pt_regs *regs)
{
regs_user->regs = task_pt_regs(current);
regs_user->abi = perf_reg_abi(current);
}

83
arch/mips/kernel/process.c
View File

@ -9,50 +9,35 @@
* Copyright (C) 2004 Thiemo Seufer
* Copyright (C) 2013 Imagination Technologies Ltd.
*/
#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kallsyms.h>
#include <linux/kernel.h>
#include <linux/nmi.h>
#include <linux/personality.h>
#include <linux/prctl.h>
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>
#include <linux/sched/task.h>
#include <linux/sched/task_stack.h>
#include <linux/tick.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/export.h>
#include <linux/ptrace.h>
#include <linux/mman.h>
#include <linux/personality.h>
#include <linux/sys.h>
#include <linux/init.h>
#include <linux/completion.h>
#include <linux/kallsyms.h>
#include <linux/random.h>
#include <linux/prctl.h>
#include <linux/nmi.h>
#include <linux/cpu.h>
#include <asm/abi.h>
#include <asm/asm.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/dsemul.h>
#include <asm/dsp.h>
#include <asm/exec.h>
#include <asm/fpu.h>
#include <asm/inst.h>
#include <asm/irq.h>
#include <asm/mips-cps.h>
#include <asm/irq_regs.h>
#include <asm/isadep.h>
#include <asm/msa.h>
#include <asm/mips-cps.h>
#include <asm/mipsregs.h>
#include <asm/processor.h>
#include <asm/reg.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/elf.h>
#include <asm/isadep.h>
#include <asm/inst.h>
#include <asm/stacktrace.h>
#include <asm/irq_regs.h>
#include <asm/exec.h>
#ifdef CONFIG_HOTPLUG_CPU
void arch_cpu_idle_dead(void)
@ -205,6 +190,36 @@ struct mips_frame_info {
#define J_TARGET(pc,target) \
(((unsigned long)(pc) & 0xf0000000) | ((target) << 2))
static inline int is_jr_ra_ins(union mips_instruction *ip)
{
#ifdef CONFIG_CPU_MICROMIPS
/*
* jr16 ra
* jr ra
*/
if (mm_insn_16bit(ip->word >> 16)) {
if (ip->mm16_r5_format.opcode == mm_pool16c_op &&
ip->mm16_r5_format.rt == mm_jr16_op &&
ip->mm16_r5_format.imm == 31)
return 1;
return 0;
}
if (ip->r_format.opcode == mm_pool32a_op &&
ip->r_format.func == mm_pool32axf_op &&
((ip->u_format.uimmediate >> 6) & GENMASK(9, 0)) == mm_jalr_op &&
ip->r_format.rt == 31)
return 1;
return 0;
#else
if (ip->r_format.opcode == spec_op &&
ip->r_format.func == jr_op &&
ip->r_format.rs == 31)
return 1;
return 0;
#endif
}
static inline int is_ra_save_ins(union mips_instruction *ip, int *poff)
{
#ifdef CONFIG_CPU_MICROMIPS
@ -390,10 +405,8 @@ static inline int is_sp_move_ins(union mips_instruction *ip, int *frame_size)
static int get_frame_info(struct mips_frame_info *info)
{
bool is_mmips = IS_ENABLED(CONFIG_CPU_MICROMIPS);
union mips_instruction insn, *ip;
const unsigned int max_insns = 128;
union mips_instruction insn, *ip, *ip_end;
unsigned int last_insn_size = 0;
unsigned int i;
bool saw_jump = false;
info->pc_offset = -1;
@ -403,7 +416,9 @@ static int get_frame_info(struct mips_frame_info *info)
if (!ip)
goto err;
for (i = 0; i < max_insns; i++) {
ip_end = (void *)ip + (info->func_size ? info->func_size : 512);
while (ip < ip_end) {
ip = (void *)ip + last_insn_size;
if (is_mmips && mm_insn_16bit(ip->halfword[0])) {
@ -417,7 +432,9 @@ static int get_frame_info(struct mips_frame_info *info)
last_insn_size = 4;
}
if (!info->frame_size) {
if (is_jr_ra_ins(ip)) {
break;
} else if (!info->frame_size) {
is_sp_move_ins(&insn, &info->frame_size);
continue;
} else if (!saw_jump && is_jump_ins(ip)) {

72
arch/mips/kernel/relocate.c
View File

@ -70,18 +70,14 @@ static void __init sync_icache(void *kbase, unsigned long kernel_length)
__sync();
}
static int __init apply_r_mips_64_rel(u32 *loc_orig, u32 *loc_new, long offset)
static void __init apply_r_mips_64_rel(u32 *loc_new, long offset)
{
*(u64 *)loc_new += offset;
return 0;
}
static int __init apply_r_mips_32_rel(u32 *loc_orig, u32 *loc_new, long offset)
static void __init apply_r_mips_32_rel(u32 *loc_new, long offset)
{
*loc_new += offset;
return 0;
}
static int __init apply_r_mips_26_rel(u32 *loc_orig, u32 *loc_new, long offset)
@ -114,7 +110,8 @@ static int __init apply_r_mips_26_rel(u32 *loc_orig, u32 *loc_new, long offset)
}
static int __init apply_r_mips_hi16_rel(u32 *loc_orig, u32 *loc_new, long offset)
static void __init apply_r_mips_hi16_rel(u32 *loc_orig, u32 *loc_new,
long offset)
{
unsigned long insn = *loc_orig;
unsigned long target = (insn & 0xffff) << 16; /* high 16bits of target */
@ -122,17 +119,33 @@ static int __init apply_r_mips_hi16_rel(u32 *loc_orig, u32 *loc_new, long offset
target += offset;
*loc_new = (insn & ~0xffff) | ((target >> 16) & 0xffff);
}
static int __init reloc_handler(u32 type, u32 *loc_orig, u32 *loc_new,
long offset)
{
switch (type) {
case R_MIPS_64:
apply_r_mips_64_rel(loc_new, offset);
break;
case R_MIPS_32:
apply_r_mips_32_rel(loc_new, offset);
break;
case R_MIPS_26:
return apply_r_mips_26_rel(loc_orig, loc_new, offset);
case R_MIPS_HI16:
apply_r_mips_hi16_rel(loc_orig, loc_new, offset);
break;
default:
pr_err("Unhandled relocation type %d at 0x%pK\n", type,
loc_orig);
return -ENOEXEC;
}
return 0;
}
static int (*reloc_handlers_rel[]) (u32 *, u32 *, long) __initdata = {
[R_MIPS_64] = apply_r_mips_64_rel,
[R_MIPS_32] = apply_r_mips_32_rel,
[R_MIPS_26] = apply_r_mips_26_rel,
[R_MIPS_HI16] = apply_r_mips_hi16_rel,
};
int __init do_relocations(void *kbase_old, void *kbase_new, long offset)
static int __init do_relocations(void *kbase_old, void *kbase_new, long offset)
{
u32 *r;
u32 *loc_orig;
@ -149,14 +162,7 @@ int __init do_relocations(void *kbase_old, void *kbase_new, long offset)
loc_orig = kbase_old + ((*r & 0x00ffffff) << 2);
loc_new = RELOCATED(loc_orig);
if (reloc_handlers_rel[type] == NULL) {
/* Unsupported relocation */
pr_err("Unhandled relocation type %d at 0x%pK\n",
type, loc_orig);
return -ENOEXEC;
}
res = reloc_handlers_rel[type](loc_orig, loc_new, offset);
res = reloc_handler(type, loc_orig, loc_new, offset);
if (res)
return res;
}
@ -300,6 +306,13 @@ static inline int __init relocation_addr_valid(void *loc_new)
return 1;
}
static inline void __init update_kaslr_offset(unsigned long *addr, long offset)
{
unsigned long *new_addr = (unsigned long *)RELOCATED(addr);
*new_addr = (unsigned long)offset;
}
#if defined(CONFIG_USE_OF)
void __weak *plat_get_fdt(void)
{
@ -410,6 +423,9 @@ void *__init relocate_kernel(void)
/* Return the new kernel's entry point */
kernel_entry = RELOCATED(start_kernel);
/* Error may occur before, so keep it at last */
update_kaslr_offset(&__kaslr_offset, offset);
}
out:
return kernel_entry;
@ -418,15 +434,11 @@ out:
/*
* Show relocation information on panic.
*/
void show_kernel_relocation(const char *level)
static void show_kernel_relocation(const char *level)
{
unsigned long offset;
offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS);
if (IS_ENABLED(CONFIG_RELOCATABLE) && offset > 0) {
if (__kaslr_offset > 0) {
printk(level);
pr_cont("Kernel relocated by 0x%pK\n", (void *)offset);
pr_cont("Kernel relocated by 0x%pK\n", (void *)__kaslr_offset);
pr_cont(" .text @ 0x%pK\n", _text);
pr_cont(" .data @ 0x%pK\n", _sdata);
pr_cont(" .bss @ 0x%pK\n", __bss_start);

71
arch/mips/kernel/setup.c
View File

@ -27,8 +27,8 @@
#include <linux/dma-map-ops.h>
#include <linux/decompress/generic.h>
#include <linux/of_fdt.h>
#include <linux/of_reserved_mem.h>
#include <linux/dmi.h>
#include <linux/crash_dump.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
@ -37,7 +37,6 @@
#include <asm/cdmm.h>
#include <asm/cpu.h>
#include <asm/debug.h>
#include <asm/dma-coherence.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/smp-ops.h>
@ -84,6 +83,9 @@ static struct resource code_resource = { .name = "Kernel code", };
static struct resource data_resource = { .name = "Kernel data", };
static struct resource bss_resource = { .name = "Kernel bss", };
unsigned long __kaslr_offset __ro_after_init;
EXPORT_SYMBOL(__kaslr_offset);
static void *detect_magic __initdata = detect_memory_region;
#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
@ -404,34 +406,32 @@ static int __init early_parse_memmap(char *p)
}
early_param("memmap", early_parse_memmap);
#ifdef CONFIG_PROC_VMCORE
static unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
static int __init early_parse_elfcorehdr(char *p)
static void __init mips_reserve_vmcore(void)
{
#ifdef CONFIG_PROC_VMCORE
phys_addr_t start, end;
u64 i;
setup_elfcorehdr = memparse(p, &p);
for_each_mem_range(i, &start, &end) {
if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
/*
* Reserve from the elf core header to the end of
* the memory segment, that should all be kdump
* reserved memory.
*/
setup_elfcorehdr_size = end - setup_elfcorehdr;
break;
if (!elfcorehdr_size) {
for_each_mem_range(i, &start, &end) {
if (elfcorehdr_addr >= start && elfcorehdr_addr < end) {
/*
* Reserve from the elf core header to the end of
* the memory segment, that should all be kdump
* reserved memory.
*/
elfcorehdr_size = end - elfcorehdr_addr;
break;
}
}
}
/*
* If we don't find it in the memory map, then we shouldn't
* have to worry about it, as the new kernel won't use it.
*/
return 0;
}
early_param("elfcorehdr", early_parse_elfcorehdr);
pr_info("Reserving %ldKB of memory at %ldKB for kdump\n",
(unsigned long)elfcorehdr_size >> 10, (unsigned long)elfcorehdr_addr >> 10);
memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
#endif
}
#ifdef CONFIG_KEXEC
@ -653,13 +653,7 @@ static void __init arch_mem_init(char **cmdline_p)
*/
memblock_set_current_limit(PFN_PHYS(max_low_pfn));
#ifdef CONFIG_PROC_VMCORE
if (setup_elfcorehdr && setup_elfcorehdr_size) {
printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
setup_elfcorehdr, setup_elfcorehdr_size);
memblock_reserve(setup_elfcorehdr, setup_elfcorehdr_size);
}
#endif
mips_reserve_vmcore();
mips_parse_crashkernel();
#ifdef CONFIG_KEXEC
@ -686,8 +680,6 @@ static void __init arch_mem_init(char **cmdline_p)
memblock_reserve(__pa_symbol(&__nosave_begin),
__pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
fdt_init_reserved_mem();
early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn));
}
@ -792,10 +784,6 @@ void __init setup_arch(char **cmdline_p)
unsigned long kernelsp[NR_CPUS];
unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
#ifdef CONFIG_USE_OF
unsigned long fw_passed_dtb;
#endif
#ifdef CONFIG_DEBUG_FS
struct dentry *mips_debugfs_dir;
static int __init debugfs_mips(void)
@ -806,15 +794,10 @@ static int __init debugfs_mips(void)
arch_initcall(debugfs_mips);
#endif
#ifdef CONFIG_DMA_MAYBE_COHERENT
/* User defined DMA coherency from command line. */
enum coherent_io_user_state coherentio = IO_COHERENCE_DEFAULT;
EXPORT_SYMBOL_GPL(coherentio);
int hw_coherentio; /* Actual hardware supported DMA coherency setting. */
#ifdef CONFIG_DMA_NONCOHERENT
static int __init setcoherentio(char *str)
{
coherentio = IO_COHERENCE_ENABLED;
dma_default_coherent = true;
pr_info("Hardware DMA cache coherency (command line)\n");
return 0;
}
@ -822,7 +805,7 @@ early_param("coherentio", setcoherentio);
static int __init setnocoherentio(char *str)
{
coherentio = IO_COHERENCE_DISABLED;
dma_default_coherent = true;
pr_info("Software DMA cache coherency (command line)\n");
return 0;
}

3
arch/mips/kernel/smp-cps.c
View File

@ -451,9 +451,6 @@ static int cps_cpu_disable(void)
unsigned cpu = smp_processor_id();
struct core_boot_config *core_cfg;
if (!cpu)
return -EBUSY;
if (!cps_pm_support_state(CPS_PM_POWER_GATED))
return -EINVAL;

6
arch/mips/kernel/smp.c
View File

@ -59,7 +59,7 @@ static DECLARE_COMPLETION(cpu_starting);
static DECLARE_COMPLETION(cpu_running);
/*
* A logcal cpu mask containing only one VPE per core to
* A logical cpu mask containing only one VPE per core to
* reduce the number of IPIs on large MT systems.
*/
cpumask_t cpu_foreign_map[NR_CPUS] __read_mostly;
@ -510,8 +510,8 @@ static inline void smp_on_each_tlb(void (*func) (void *info), void *info)
* address spaces, a new context is obtained on the current cpu, and tlb
* context on other cpus are invalidated to force a new context allocation
* at switch_mm time, should the mm ever be used on other cpus. For
* multithreaded address spaces, intercpu interrupts have to be sent.
* Another case where intercpu interrupts are required is when the target
* multithreaded address spaces, inter-CPU interrupts have to be sent.
* Another case where inter-CPU interrupts are required is when the target
* mm might be active on another cpu (eg debuggers doing the flushes on
* behalf of debugees, kswapd stealing pages from another process etc).
* Kanoj 07/00.

16
arch/mips/kernel/syscalls/Makefile
View File

@ -44,17 +44,17 @@ $(uapi)/unistd_o32.h: $(syscallo32) $(syshdr)
sysnr_pfx_unistd_nr_n32 := N32
sysnr_offset_unistd_nr_n32 := 6000
$(uapi)/unistd_nr_n32.h: $(syscalln32) $(sysnr)
$(kapi)/unistd_nr_n32.h: $(syscalln32) $(sysnr)
$(call if_changed,sysnr)
sysnr_pfx_unistd_nr_n64 := 64
sysnr_offset_unistd_nr_n64 := 5000
$(uapi)/unistd_nr_n64.h: $(syscalln64) $(sysnr)
$(kapi)/unistd_nr_n64.h: $(syscalln64) $(sysnr)
$(call if_changed,sysnr)
sysnr_pfx_unistd_nr_o32 := O32
sysnr_offset_unistd_nr_o32 := 4000
$(uapi)/unistd_nr_o32.h: $(syscallo32) $(sysnr)
$(kapi)/unistd_nr_o32.h: $(syscallo32) $(sysnr)
$(call if_changed,sysnr)
systbl_abi_syscall_table_32_o32 := 32_o32
@ -79,14 +79,14 @@ $(kapi)/syscall_table_64_o32.h: $(syscallo32) $(systbl)
uapisyshdr-y += unistd_n32.h \
unistd_n64.h \
unistd_o32.h \
unistd_nr_n32.h \
unistd_nr_n64.h \
unistd_nr_o32.h
unistd_o32.h
kapisyshdr-y += syscall_table_32_o32.h \
syscall_table_64_n32.h \
syscall_table_64_n64.h \
syscall_table_64_o32.h
syscall_table_64_o32.h \
unistd_nr_n32.h \
unistd_nr_n64.h \
unistd_nr_o32.h
targets += $(uapisyshdr-y) $(kapisyshdr-y)

11
arch/mips/kernel/vmlinux.lds.S
View File

@ -66,9 +66,10 @@ SECTIONS
KPROBES_TEXT
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
*(.text.*)
*(.fixup)
*(.gnu.warning)
. = ALIGN(16);
*(.got) /* Global offset table */
} :text = 0
_etext = .; /* End of text section */
@ -90,6 +91,7 @@ SECTIONS
INIT_TASK_DATA(THREAD_SIZE)
NOSAVE_DATA
PAGE_ALIGNED_DATA(PAGE_SIZE)
CACHELINE_ALIGNED_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
READ_MOSTLY_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
DATA_DATA
@ -137,6 +139,11 @@ SECTIONS
PERCPU_SECTION(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
#endif
.rel.dyn : ALIGN(8) {
*(.rel)
*(.rel*)
}
#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
.appended_dtb : AT(ADDR(.appended_dtb) - LOAD_OFFSET) {
*(.appended_dtb)
@ -220,9 +227,9 @@ SECTIONS
/* ABI crap starts here */
*(.MIPS.abiflags)
*(.MIPS.options)
*(.gnu.attributes)
*(.options)
*(.pdr)
*(.reginfo)
*(.eh_frame)
}
}

4
arch/mips/kernel/vpe-cmp.c
View File

@ -117,8 +117,8 @@ int __init vpe_module_init(void)
}
device_initialize(&vpe_device);
vpe_device.class = &vpe_class,
vpe_device.parent = NULL,
vpe_device.class = &vpe_class;
vpe_device.parent = NULL;
dev_set_name(&vpe_device, "vpe_sp");
vpe_device.devt = MKDEV(major, VPE_MODULE_MINOR);
err = device_add(&vpe_device);

4
arch/mips/kernel/vpe-mt.c
View File

@ -365,8 +365,8 @@ int __init vpe_module_init(void)
}
device_initialize(&vpe_device);
vpe_device.class = &vpe_class,
vpe_device.parent = NULL,
vpe_device.class = &vpe_class;
vpe_device.parent = NULL;
dev_set_name(&vpe_device, "vpe1");
vpe_device.devt = MKDEV(major, VPE_MODULE_MINOR);
err = device_add(&vpe_device);

33
arch/mips/kernel/vpe.c
View File

@ -746,28 +746,12 @@ static int vpe_elfload(struct vpe *v)
return 0;
}
static int getcwd(char *buff, int size)
{
mm_segment_t old_fs;
int ret;
old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_getcwd(buff, size);
set_fs(old_fs);
return ret;
}
/* checks VPE is unused and gets ready to load program */
static int vpe_open(struct inode *inode, struct file *filp)
{
enum vpe_state state;
struct vpe_notifications *notifier;
struct vpe *v;
int ret;
if (VPE_MODULE_MINOR != iminor(inode)) {
/* assume only 1 device at the moment. */
@ -803,12 +787,6 @@ static int vpe_open(struct inode *inode, struct file *filp)
v->plen = P_SIZE;
v->load_addr = NULL;
v->len = 0;
v->cwd[0] = 0;
ret = getcwd(v->cwd, VPE_PATH_MAX);
if (ret < 0)
pr_warn("VPE loader: open, getcwd returned %d\n", ret);
v->shared_ptr = NULL;
v->__start = 0;
@ -915,17 +893,6 @@ int vpe_notify(int index, struct vpe_notifications *notify)
}
EXPORT_SYMBOL(vpe_notify);
char *vpe_getcwd(int index)
{
struct vpe *v = get_vpe(index);
if (v == NULL)
return NULL;
return v->cwd;
}
EXPORT_SYMBOL(vpe_getcwd);
module_init(vpe_module_init);
module_exit(vpe_module_exit);
MODULE_DESCRIPTION("MIPS VPE Loader");

2
arch/mips/kvm/mips.c
View File

@ -148,7 +148,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
default:
/* Unsupported KVM type */
return -EINVAL;
};
}
/* Allocate page table to map GPA -> RPA */
kvm->arch.gpa_mm.pgd = kvm_pgd_alloc();

10
arch/mips/lantiq/irq.c
View File

@ -8,6 +8,7 @@
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/irqchip.h>
#include <linux/irqdomain.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
@ -302,7 +303,7 @@ static void ltq_hw_irq_handler(struct irq_desc *desc)
generic_handle_irq(irq_linear_revmap(ltq_domain, hwirq));
/* if this is a EBU irq, we need to ack it or get a deadlock */
if ((irq == LTQ_ICU_EBU_IRQ) && (module == 0) && LTQ_EBU_PCC_ISTAT)
if (irq == LTQ_ICU_EBU_IRQ && !module && LTQ_EBU_PCC_ISTAT != 0)
ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_ISTAT) | 0x10,
LTQ_EBU_PCC_ISTAT);
}
@ -422,12 +423,9 @@ unsigned int get_c0_compare_int(void)
return CP0_LEGACY_COMPARE_IRQ;
}
static const struct of_device_id of_irq_ids[] __initconst = {
{ .compatible = "lantiq,icu", .data = icu_of_init },
{},
};
IRQCHIP_DECLARE(lantiq_icu, "lantiq,icu", icu_of_init);
void __init arch_init_irq(void)
{
of_irq_init(of_irq_ids);
irqchip_init();
}

11
arch/mips/lantiq/prom.c
View File

@ -44,10 +44,6 @@ int ltq_soc_type(void)
return soc_info.type;
}
void __init prom_free_prom_memory(void)
{
}
static void __init prom_init_cmdline(void)
{
int argc = fw_arg0;
@ -77,11 +73,8 @@ void __init plat_mem_setup(void)
set_io_port_base((unsigned long) KSEG1);
if (fw_passed_dtb) /* UHI interface */
dtb = (void *)fw_passed_dtb;
else if (__dtb_start != __dtb_end)
dtb = (void *)__dtb_start;
else
dtb = get_fdt();
if (dtb == NULL)
panic("no dtb found");
/*

5
arch/mips/loongson2ef/common/init.c
View File

@ -19,7 +19,6 @@ unsigned long __maybe_unused _loongson_addrwincfg_base;
static void __init mips_nmi_setup(void)
{
void *base;
extern char except_vec_nmi[];
base = (void *)(CAC_BASE + 0x380);
memcpy(base, except_vec_nmi, 0x80);
@ -46,7 +45,3 @@ void __init prom_init(void)
prom_init_uart_base();
board_nmi_handler_setup = mips_nmi_setup;
}
void __init prom_free_prom_memory(void)
{
}

11
arch/mips/loongson2ef/common/mem.c
View File

@ -41,14 +41,3 @@ void __init prom_init_memory(void)
memblock_add(LOONGSON_HIGHMEM_START, highmemsize << 20);
#endif /* !CONFIG_64BIT */
}
/* override of arch/mips/mm/cache.c: __uncached_access */
int __uncached_access(struct file *file, unsigned long addr)
{
if (file->f_flags & O_DSYNC)
return 1;
return addr >= __pa(high_memory) ||
((addr >= LOONGSON_MMIO_MEM_START) &&
(addr < LOONGSON_MMIO_MEM_END));
}

4
arch/mips/loongson32/common/prom.c
View File

@ -36,10 +36,6 @@ void __init prom_init(void)
setup_8250_early_printk_port((unsigned long)uart_base, 0, 0);
}
void __init prom_free_prom_memory(void)
{
}
void __init plat_mem_setup(void)
{
memblock_add(0x0, (memsize << 20));

22
arch/mips/loongson64/Platform
View File

@ -5,28 +5,6 @@
cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap
#
# Some versions of binutils, not currently mainline as of 2019/02/04, support
# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
# description).
#
# We disable this in order to prevent the assembler meddling with the
# instruction that labels refer to, ie. if we label an ll instruction:
#
# 1: ll v0, 0(a0)
#
# ...then with the assembler fix applied the label may actually point at a sync
# instruction inserted by the assembler, and if we were using the label in an
# exception table the table would no longer contain the address of the ll
# instruction.
#
# Avoid this by explicitly disabling that assembler behaviour. If upstream
# binutils does not merge support for the flag then we can revisit & remove
# this later - for now it ensures vendor toolchains don't cause problems.
#
cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
#
# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
# as MIPS64 R2; older versions as just R1. This leaves the possibility open

54
arch/mips/loongson64/init.c
View File

@ -25,7 +25,6 @@ u32 node_id_offset;
static void __init mips_nmi_setup(void)
{
void *base;
extern char except_vec_nmi[];
base = (void *)(CAC_BASE + 0x380);
memcpy(base, except_vec_nmi, 0x80);
@ -47,6 +46,51 @@ void virtual_early_config(void)
node_id_offset = 44;
}
void __init szmem(unsigned int node)
{
u32 i, mem_type;
static unsigned long num_physpages;
u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
/* Parse memory information and activate */
for (i = 0; i < loongson_memmap->nr_map; i++) {
node_id = loongson_memmap->map[i].node_id;
if (node_id != node)
continue;
mem_type = loongson_memmap->map[i].mem_type;
mem_size = loongson_memmap->map[i].mem_size;
mem_start = loongson_memmap->map[i].mem_start;
switch (mem_type) {
case SYSTEM_RAM_LOW:
case SYSTEM_RAM_HIGH:
start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
node_psize = (mem_size << 20) >> PAGE_SHIFT;
end_pfn = start_pfn + node_psize;
num_physpages += node_psize;
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
start_pfn, end_pfn, num_physpages);
memblock_add_node(PFN_PHYS(start_pfn), PFN_PHYS(node_psize), node);
break;
case SYSTEM_RAM_RESERVED:
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
memblock_reserve(((node_id << 44) + mem_start), mem_size << 20);
break;
}
}
}
#ifndef CONFIG_NUMA
static void __init prom_init_memory(void)
{
szmem(0);
}
#endif
void __init prom_init(void)
{
fw_init_cmdline();
@ -57,7 +101,11 @@ void __init prom_init(void)
loongson_sysconf.early_config();
#ifdef CONFIG_NUMA
prom_init_numa_memory();
#else
prom_init_memory();
#endif
/* Hardcode to CPU UART 0 */
setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
@ -66,10 +114,6 @@ void __init prom_init(void)
board_nmi_handler_setup = mips_nmi_setup;
}
void __init prom_free_prom_memory(void)
{
}
static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start,
resource_size_t size)
{

52
arch/mips/loongson64/numa.c
View File

@ -25,6 +25,7 @@
#include <asm/time.h>
#include <asm/wbflush.h>
#include <boot_param.h>
#include <loongson.h>
static struct pglist_data prealloc__node_data[MAX_NUMNODES];
unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
@ -81,57 +82,6 @@ static void __init init_topology_matrix(void)
}
}
static void __init szmem(unsigned int node)
{
u32 i, mem_type;
static unsigned long num_physpages;
u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
/* Parse memory information and activate */
for (i = 0; i < loongson_memmap->nr_map; i++) {
node_id = loongson_memmap->map[i].node_id;
if (node_id != node)
continue;
mem_type = loongson_memmap->map[i].mem_type;
mem_size = loongson_memmap->map[i].mem_size;
mem_start = loongson_memmap->map[i].mem_start;
switch (mem_type) {
case SYSTEM_RAM_LOW:
start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
node_psize = (mem_size << 20) >> PAGE_SHIFT;
end_pfn = start_pfn + node_psize;
num_physpages += node_psize;
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
start_pfn, end_pfn, num_physpages);
memblock_add_node(PFN_PHYS(start_pfn),
PFN_PHYS(node_psize), node);
break;
case SYSTEM_RAM_HIGH:
start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
node_psize = (mem_size << 20) >> PAGE_SHIFT;
end_pfn = start_pfn + node_psize;
num_physpages += node_psize;
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
start_pfn, end_pfn, num_physpages);
memblock_add_node(PFN_PHYS(start_pfn),
PFN_PHYS(node_psize), node);
break;
case SYSTEM_RAM_RESERVED:
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
(u32)node_id, mem_type, mem_start, mem_size);
memblock_reserve(((node_id << 44) + mem_start),
mem_size << 20);
break;
}
}
}
static void __init node_mem_init(unsigned int node)
{
unsigned long node_addrspace_offset;

8
arch/mips/loongson64/smp.c
View File

@ -483,7 +483,8 @@ static void __init loongson3_smp_setup(void)
init_cpu_possible(cpu_none_mask);
/* For unified kernel, NR_CPUS is the maximum possible value,
* loongson_sysconf.nr_cpus is the really present value */
* loongson_sysconf.nr_cpus is the really present value
*/
while (i < loongson_sysconf.nr_cpus) {
if (loongson_sysconf.reserved_cpus_mask & (1<<i)) {
/* Reserved physical CPU cores */
@ -492,6 +493,8 @@ static void __init loongson3_smp_setup(void)
__cpu_number_map[i] = num;
__cpu_logical_map[num] = i;
set_cpu_possible(num, true);
/* Loongson processors are always grouped by 4 */
cpu_set_cluster(&cpu_data[num], i / 4);
num++;
}
i++;
@ -567,7 +570,8 @@ static void loongson3_cpu_die(unsigned int cpu)
/* To shutdown a core in Loongson 3, the target core should go to CKSEG1 and
* flush all L1 entries at first. Then, another core (usually Core 0) can
* safely disable the clock of the target core. loongson3_play_dead() is
* called via CKSEG1 (uncached and unmmaped) */
* called via CKSEG1 (uncached and unmmaped)
*/
static void loongson3_type1_play_dead(int *state_addr)
{
register int val;

13
arch/mips/mm/c-r4k.c
View File

@ -19,6 +19,7 @@
#include <linux/mm.h>
#include <linux/export.h>
#include <linux/bitops.h>
#include <linux/dma-map-ops.h> /* for dma_default_coherent */
#include <asm/bcache.h>
#include <asm/bootinfo.h>
@ -35,7 +36,6 @@
#include <asm/war.h>
#include <asm/cacheflush.h> /* for run_uncached() */
#include <asm/traps.h>
#include <asm/dma-coherence.h>
#include <asm/mips-cps.h>
/*
@ -1164,6 +1164,7 @@ static void probe_pcache(void)
case CPU_R4400PC:
case CPU_R4400SC:
case CPU_R4400MC:
case CPU_R4300:
icache_size = 1 << (12 + ((config & CONF_IC) >> 9));
c->icache.linesz = 16 << ((config & CONF_IB) >> 5);
c->icache.ways = 1;
@ -1593,7 +1594,7 @@ static int probe_scache(void)
return 1;
}
static void __init loongson2_sc_init(void)
static void loongson2_sc_init(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
@ -1913,15 +1914,11 @@ void r4k_cache_init(void)
__local_flush_icache_user_range = local_r4k_flush_icache_user_range;
#ifdef CONFIG_DMA_NONCOHERENT
#ifdef CONFIG_DMA_MAYBE_COHERENT
if (coherentio == IO_COHERENCE_ENABLED ||
(coherentio == IO_COHERENCE_DEFAULT && hw_coherentio)) {
if (dma_default_coherent) {
_dma_cache_wback_inv = (void *)cache_noop;
_dma_cache_wback = (void *)cache_noop;
_dma_cache_inv = (void *)cache_noop;
} else
#endif /* CONFIG_DMA_MAYBE_COHERENT */
{
} else {
_dma_cache_wback_inv = r4k_dma_cache_wback_inv;
_dma_cache_wback = r4k_dma_cache_wback_inv;
_dma_cache_inv = r4k_dma_cache_inv;

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