Skip to content

L
linux
Commit 4ab10567 authored by Russell King's avatar Russell King
Browse files
Options

Merge branch 'v3-removal' into for-linus 

Conflicts:
	arch/arm/boot/compressed/head.S
parents 4175160b 4cdfc2ec
Expand all Hide whitespace changes
Inline Side-by-side
Showing with 10 additions and 1454 deletions
arch/arm/Makefile
View file @ 4ab10567
......@@ -70,8 +70,6 @@ arch-$(CONFIG_CPU_32v4) :=-D__LINUX_ARM_ARCH__=4 -march=armv4
arch-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3 -march=armv3
# This selects how we optimise for the processor.
tune-$(CONFIG_CPU_ARM610) :=-mtune=arm610
tune-$(CONFIG_CPU_ARM710) :=-mtune=arm710
tune-$(CONFIG_CPU_ARM7TDMI) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM720T) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM740T) :=-mtune=arm7tdmi
......
arch/arm/boot/compressed/head.S
View file @ 4ab10567
......@@ -686,19 +686,6 @@ __fa526_cache_on:
mcr p15, 0, r0, c8, c7, 0 @ flush UTLB
mov pc, r12
__arm6_mmu_cache_on:
mov r12, lr
mov r6, #CB_BITS | 0x12 @ U
bl __setup_mmu
mov r0, #0
mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
mov r0, #0x30
bl __common_mmu_cache_on
mov r0, #0
mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
mov pc, r12
__common_mmu_cache_on:
#ifndef CONFIG_THUMB2_KERNEL
#ifndef DEBUG
......@@ -763,16 +750,6 @@ call_cache_fn: adr r12, proc_types
.align 2
.type proc_types,#object
proc_types:
.word 0x41560600 @ ARM6/610
.word 0xffffffe0
W(b) __arm6_mmu_cache_off @ works, but slow
W(b) __arm6_mmu_cache_off
mov pc, lr
THUMB( nop )
@ b __arm6_mmu_cache_on @ untested
@ b __arm6_mmu_cache_off
@ b __armv3_mmu_cache_flush
.word 0x00000000 @ old ARM ID
.word 0x0000f000
mov pc, lr
......@@ -784,8 +761,10 @@ proc_types:
.word 0x41007000 @ ARM7/710
.word 0xfff8fe00
W(b) __arm7_mmu_cache_off
W(b) __arm7_mmu_cache_off
mov pc, lr
THUMB( nop )
mov pc, lr
THUMB( nop )
mov pc, lr
THUMB( nop )
......@@ -984,21 +963,6 @@ __armv7_mmu_cache_off:
mcr p15, 0, r0, c7, c5, 4 @ ISB
mov pc, r12
__arm6_mmu_cache_off:
mov r0, #0x00000030 @ ARM6 control reg.
b __armv3_mmu_cache_off
__arm7_mmu_cache_off:
mov r0, #0x00000070 @ ARM7 control reg.
b __armv3_mmu_cache_off
__armv3_mmu_cache_off:
mcr p15, 0, r0, c1, c0, 0 @ turn MMU and cache off
mov r0, #0
mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
mov pc, lr
/*
* Clean and flush the cache to maintain consistency.
*
......
arch/arm/configs/rpc_defconfig
View file @ 4ab10567
......@@ -8,8 +8,6 @@ CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_BLK_DEV_BSG is not set
CONFIG_ARCH_RPC=y
CONFIG_CPU_ARM610=y
CONFIG_CPU_ARM710=y
CONFIG_CPU_SA110=y
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
......
arch/arm/include/asm/glue-df.h
View file @ 4ab10567
......@@ -31,14 +31,6 @@
#undef CPU_DABORT_HANDLER
#undef MULTI_DABORT
#if defined(CONFIG_CPU_ARM610)
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
# else
# define CPU_DABORT_HANDLER cpu_arm6_data_abort
# endif
#endif
#if defined(CONFIG_CPU_ARM710)
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
......
arch/arm/include/asm/glue-proc.h
View file @ 4ab10567
......@@ -23,15 +23,6 @@
* CPU_NAME - the prefix for CPU related functions
*/
#ifdef CONFIG_CPU_ARM610
# ifdef CPU_NAME
# undef MULTI_CPU
# define MULTI_CPU
# else
# define CPU_NAME cpu_arm6
# endif
#endif
#ifdef CONFIG_CPU_ARM7TDMI
# ifdef CPU_NAME
# undef MULTI_CPU
......@@ -41,15 +32,6 @@
# endif
#endif
#ifdef CONFIG_CPU_ARM710
# ifdef CPU_NAME
# undef MULTI_CPU
# define MULTI_CPU
# else
# define CPU_NAME cpu_arm7
# endif
#endif
#ifdef CONFIG_CPU_ARM720T
# ifdef CPU_NAME
# undef MULTI_CPU
......
arch/arm/include/asm/page.h
View file @ 4ab10567
......@@ -34,7 +34,6 @@
* processor(s) we're building for.
*
* We have the following to choose from:
* v3 - ARMv3
* v4wt - ARMv4 with writethrough cache, without minicache
* v4wb - ARMv4 with writeback cache, without minicache
* v4_mc - ARMv4 with minicache
......@@ -44,14 +43,6 @@
#undef _USER
#undef MULTI_USER
#ifdef CONFIG_CPU_COPY_V3
# ifdef _USER
# define MULTI_USER 1
# else
# define _USER v3
# endif
#endif
#ifdef CONFIG_CPU_COPY_V4WT
# ifdef _USER
# define MULTI_USER 1
......
arch/arm/include/asm/tlbflush.h
View file @ 4ab10567
......@@ -65,21 +65,6 @@
#define MULTI_TLB 1
#endif
#define v3_tlb_flags (TLB_V3_FULL | TLB_V3_PAGE)
#ifdef CONFIG_CPU_TLB_V3
# define v3_possible_flags v3_tlb_flags
# define v3_always_flags v3_tlb_flags
# ifdef _TLB
# define MULTI_TLB 1
# else
# define _TLB v3
# endif
#else
# define v3_possible_flags 0
# define v3_always_flags (-1UL)
#endif
#define v4_tlb_flags (TLB_V4_U_FULL | TLB_V4_U_PAGE)
#ifdef CONFIG_CPU_TLB_V4WT
......@@ -298,8 +283,7 @@ extern struct cpu_tlb_fns cpu_tlb;
* implemented the "%?" method, but this has been discontinued due to too
* many people getting it wrong.
*/
#define possible_tlb_flags (v3_possible_flags | \
v4_possible_flags | \
#define possible_tlb_flags (v4_possible_flags | \
v4wbi_possible_flags | \
fr_possible_flags | \
v4wb_possible_flags | \
......@@ -307,8 +291,7 @@ extern struct cpu_tlb_fns cpu_tlb;
v6wbi_possible_flags | \
v7wbi_possible_flags)
#define always_tlb_flags (v3_always_flags & \
v4_always_flags & \
#define always_tlb_flags (v4_always_flags & \
v4wbi_always_flags & \
fr_always_flags & \
v4wb_always_flags & \
......
arch/arm/kernel/entry-armv.S
View file @ 4ab10567
......@@ -556,10 +556,6 @@ call_fpe:
#endif
tst r0, #0x08000000 @ only CDP/CPRT/LDC/STC have bit 27
tstne r0, #0x04000000 @ bit 26 set on both ARM and Thumb-2
#if defined(CONFIG_CPU_ARM610) || defined(CONFIG_CPU_ARM710)
and r8, r0, #0x0f000000 @ mask out op-code bits
teqne r8, #0x0f000000 @ SWI (ARM6/7 bug)?
#endif
moveq pc, lr
get_thread_info r10 @ get current thread
and r8, r0, #0x00000f00 @ mask out CP number
......
arch/arm/kernel/entry-common.S
View file @ 4ab10567
......@@ -335,20 +335,6 @@ ENDPROC(ftrace_stub)
*-----------------------------------------------------------------------------
*/
/* If we're optimising for StrongARM the resulting code won't
run on an ARM7 and we can save a couple of instructions.
--pb */
#ifdef CONFIG_CPU_ARM710
#define A710(code...) code
.Larm710bug:
ldmia sp, {r0 - lr}^ @ Get calling r0 - lr
mov r0, r0
add sp, sp, #S_FRAME_SIZE
subs pc, lr, #4
#else
#define A710(code...)
#endif
.align 5
ENTRY(vector_swi)
sub sp, sp, #S_FRAME_SIZE
......@@ -379,9 +365,6 @@ ENTRY(vector_swi)
ldreq r10, [lr, #-4] @ get SWI instruction
#else
ldr r10, [lr, #-4] @ get SWI instruction
A710( and ip, r10, #0x0f000000 @ check for SWI )
A710( teq ip, #0x0f000000 )
A710( bne .Larm710bug )
#endif
#ifdef CONFIG_CPU_ENDIAN_BE8
rev r10, r10 @ little endian instruction
......@@ -392,26 +375,15 @@ ENTRY(vector_swi)
/*
* Pure EABI user space always put syscall number into scno (r7).
*/
A710( ldr ip, [lr, #-4] @ get SWI instruction )
A710( and ip, ip, #0x0f000000 @ check for SWI )
A710( teq ip, #0x0f000000 )
A710( bne .Larm710bug )
#elif defined(CONFIG_ARM_THUMB)
/* Legacy ABI only, possibly thumb mode. */
tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs
addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in
ldreq scno, [lr, #-4]
#else
/* Legacy ABI only. */
ldr scno, [lr, #-4] @ get SWI instruction
A710( and ip, scno, #0x0f000000 @ check for SWI )
A710( teq ip, #0x0f000000 )
A710( bne .Larm710bug )
#endif
#ifdef CONFIG_ALIGNMENT_TRAP
......
arch/arm/lib/Makefile
View file @ 4ab10567
......@@ -17,30 +17,13 @@ lib-y := backtrace.o changebit.o csumipv6.o csumpartial.o \
call_with_stack.o
mmu-y := clear_user.o copy_page.o getuser.o putuser.o
# the code in uaccess.S is not preemption safe and
# probably faster on ARMv3 only
ifeq ($(CONFIG_PREEMPT),y)
mmu-y += copy_from_user.o copy_to_user.o
else
ifneq ($(CONFIG_CPU_32v3),y)
mmu-y += copy_from_user.o copy_to_user.o
else
mmu-y += uaccess.o
endif
endif
mmu-y += copy_from_user.o copy_to_user.o
# using lib_ here won't override already available weak symbols
obj-$(CONFIG_UACCESS_WITH_MEMCPY) += uaccess_with_memcpy.o
lib-$(CONFIG_MMU) += $(mmu-y)
ifeq ($(CONFIG_CPU_32v3),y)
lib-y += io-readsw-armv3.o io-writesw-armv3.o
else
lib-y += io-readsw-armv4.o io-writesw-armv4.o
endif
lib-$(CONFIG_MMU) += $(mmu-y)
lib-y += io-readsw-armv4.o io-writesw-armv4.o
lib-$(CONFIG_ARCH_RPC) += ecard.o io-acorn.o floppydma.o
lib-$(CONFIG_ARCH_SHARK) += io-shark.o
......
arch/arm/lib/io-readsw-armv3.S deleted 100644 → 0
View file @ 4175160b
/*
* linux/arch/arm/lib/io-readsw-armv3.S
*
* Copyright (C) 1995-2000 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.Linsw_bad_alignment:
adr r0, .Linsw_bad_align_msg
mov r2, lr
b panic
.Linsw_bad_align_msg:
.asciz "insw: bad buffer alignment (0x%p, lr=0x%08lX)\n"
.align
.Linsw_align: tst r1, #1
bne .Linsw_bad_alignment
ldr r3, [r0]
strb r3, [r1], #1
mov r3, r3, lsr #8
strb r3, [r1], #1
subs r2, r2, #1
moveq pc, lr
ENTRY(__raw_readsw)
teq r2, #0 @ do we have to check for the zero len?
moveq pc, lr
tst r1, #3
bne .Linsw_align
.Linsw_aligned: mov ip, #0xff
orr ip, ip, ip, lsl #8
stmfd sp!, {r4, r5, r6, lr}
subs r2, r2, #8
bmi .Lno_insw_8
.Linsw_8_lp: ldr r3, [r0]
and r3, r3, ip
ldr r4, [r0]
orr r3, r3, r4, lsl #16
ldr r4, [r0]
and r4, r4, ip
ldr r5, [r0]
orr r4, r4, r5, lsl #16
ldr r5, [r0]
and r5, r5, ip
ldr r6, [r0]
orr r5, r5, r6, lsl #16
ldr r6, [r0]
and r6, r6, ip
ldr lr, [r0]
orr r6, r6, lr, lsl #16
stmia r1!, {r3 - r6}
subs r2, r2, #8
bpl .Linsw_8_lp
tst r2, #7
ldmeqfd sp!, {r4, r5, r6, pc}
.Lno_insw_8: tst r2, #4
beq .Lno_insw_4
ldr r3, [r0]
and r3, r3, ip
ldr r4, [r0]
orr r3, r3, r4, lsl #16
ldr r4, [r0]
and r4, r4, ip
ldr r5, [r0]
orr r4, r4, r5, lsl #16
stmia r1!, {r3, r4}
.Lno_insw_4: tst r2, #2
beq .Lno_insw_2
ldr r3, [r0]
and r3, r3, ip
ldr r4, [r0]
orr r3, r3, r4, lsl #16
str r3, [r1], #4
.Lno_insw_2: tst r2, #1
ldrne r3, [r0]
strneb r3, [r1], #1
movne r3, r3, lsr #8
strneb r3, [r1]
ldmfd sp!, {r4, r5, r6, pc}
arch/arm/lib/io-writesw-armv3.S deleted 100644 → 0
View file @ 4175160b
/*
* linux/arch/arm/lib/io-writesw-armv3.S
*
* Copyright (C) 1995-2000 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.Loutsw_bad_alignment:
adr r0, .Loutsw_bad_align_msg
mov r2, lr
b panic
.Loutsw_bad_align_msg:
.asciz "outsw: bad buffer alignment (0x%p, lr=0x%08lX)\n"
.align
.Loutsw_align: tst r1, #1
bne .Loutsw_bad_alignment
add r1, r1, #2
ldr r3, [r1, #-4]
mov r3, r3, lsr #16
orr r3, r3, r3, lsl #16
str r3, [r0]
subs r2, r2, #1
moveq pc, lr
ENTRY(__raw_writesw)
teq r2, #0 @ do we have to check for the zero len?
moveq pc, lr
tst r1, #3
bne .Loutsw_align
stmfd sp!, {r4, r5, r6, lr}
subs r2, r2, #8
bmi .Lno_outsw_8
.Loutsw_8_lp: ldmia r1!, {r3, r4, r5, r6}
mov ip, r3, lsl #16
orr ip, ip, ip, lsr #16
str ip, [r0]
mov ip, r3, lsr #16
orr ip, ip, ip, lsl #16
str ip, [r0]
mov ip, r4, lsl #16
orr ip, ip, ip, lsr #16
str ip, [r0]
mov ip, r4, lsr #16
orr ip, ip, ip, lsl #16
str ip, [r0]
mov ip, r5, lsl #16
orr ip, ip, ip, lsr #16
str ip, [r0]
mov ip, r5, lsr #16
orr ip, ip, ip, lsl #16
str ip, [r0]
mov ip, r6, lsl #16
orr ip, ip, ip, lsr #16
str ip, [r0]
mov ip, r6, lsr #16
orr ip, ip, ip, lsl #16
str ip, [r0]
subs r2, r2, #8
bpl .Loutsw_8_lp
tst r2, #7
ldmeqfd sp!, {r4, r5, r6, pc}
.Lno_outsw_8: tst r2, #4
beq .Lno_outsw_4
ldmia r1!, {r3, r4}
mov ip, r3, lsl #16
orr ip, ip, ip, lsr #16
str ip, [r0]
mov ip, r3, lsr #16
orr ip, ip, ip, lsl #16
str ip, [r0]
mov ip, r4, lsl #16
orr ip, ip, ip, lsr #16
str ip, [r0]
mov ip, r4, lsr #16
orr ip, ip, ip, lsl #16
str ip, [r0]
.Lno_outsw_4: tst r2, #2
beq .Lno_outsw_2
ldr r3, [r1], #4
mov ip, r3, lsl #16
orr ip, ip, ip, lsr #16
str ip, [r0]
mov ip, r3, lsr #16
orr ip, ip, ip, lsl #16
str ip, [r0]
.Lno_outsw_2: tst r2, #1
ldrne r3, [r1]
movne ip, r3, lsl #16
orrne ip, ip, ip, lsr #16
strne ip, [r0]
ldmfd sp!, {r4, r5, r6, pc}
arch/arm/lib/uaccess.S deleted 100644 → 0
View file @ 4175160b
This diff is collapsed.
arch/arm/mm/Kconfig
View file @ 4ab10567
......@@ -4,23 +4,6 @@ comment "Processor Type"
# which CPUs we support in the kernel image, and the compiler instruction
# optimiser behaviour.
# ARM610
config CPU_ARM610
bool "Support ARM610 processor" if ARCH_RPC
select CPU_32v3
select CPU_CACHE_V3
select CPU_CACHE_VIVT
select CPU_CP15_MMU
select CPU_COPY_V3 if MMU
select CPU_TLB_V3 if MMU
select CPU_PABRT_LEGACY
help
The ARM610 is the successor to the ARM3 processor
and was produced by VLSI Technology Inc.
Say Y if you want support for the ARM610 processor.
Otherwise, say N.
# ARM7TDMI
config CPU_ARM7TDMI
bool "Support ARM7TDMI processor"
......@@ -36,25 +19,6 @@ config CPU_ARM7TDMI
Say Y if you want support for the ARM7TDMI processor.
Otherwise, say N.
# ARM710
config CPU_ARM710
bool "Support ARM710 processor" if ARCH_RPC
select CPU_32v3
select CPU_CACHE_V3
select CPU_CACHE_VIVT
select CPU_CP15_MMU
select CPU_COPY_V3 if MMU
select CPU_TLB_V3 if MMU
select CPU_PABRT_LEGACY
help
A 32-bit RISC microprocessor based on the ARM7 processor core
designed by Advanced RISC Machines Ltd. The ARM710 is the
successor to the ARM610 processor. It was released in
July 1994 by VLSI Technology Inc.
Say Y if you want support for the ARM710 processor.
Otherwise, say N.
# ARM720T
config CPU_ARM720T
bool "Support ARM720T processor" if ARCH_INTEGRATOR
......@@ -530,9 +494,6 @@ config CPU_CACHE_FA
if MMU
# The copy-page model
config CPU_COPY_V3
bool
config CPU_COPY_V4WT
bool
......@@ -549,11 +510,6 @@ config CPU_COPY_V6
bool
# This selects the TLB model
config CPU_TLB_V3
bool
help
ARM Architecture Version 3 TLB.
config CPU_TLB_V4WT
bool
help
......@@ -731,7 +687,7 @@ config CPU_HIGH_VECTOR
config CPU_ICACHE_DISABLE
bool "Disable I-Cache (I-bit)"
depends on CPU_CP15 && !(CPU_ARM610 || CPU_ARM710 || CPU_ARM720T || CPU_ARM740T || CPU_XSCALE || CPU_XSC3)
depends on CPU_CP15 && !(CPU_ARM720T || CPU_ARM740T || CPU_XSCALE || CPU_XSC3)
help
Say Y here to disable the processor instruction cache. Unless
you have a reason not to or are unsure, say N.
......
arch/arm/mm/Makefile
View file @ 4ab10567
......@@ -44,7 +44,6 @@ obj-$(CONFIG_CPU_CACHE_FA) += cache-fa.o
AFLAGS_cache-v6.o :=-Wa,-march=armv6
AFLAGS_cache-v7.o :=-Wa,-march=armv7-a
obj-$(CONFIG_CPU_COPY_V3) += copypage-v3.o
obj-$(CONFIG_CPU_COPY_V4WT) += copypage-v4wt.o
obj-$(CONFIG_CPU_COPY_V4WB) += copypage-v4wb.o
obj-$(CONFIG_CPU_COPY_FEROCEON) += copypage-feroceon.o
......@@ -54,7 +53,6 @@ obj-$(CONFIG_CPU_XSCALE) += copypage-xscale.o
obj-$(CONFIG_CPU_XSC3) += copypage-xsc3.o
obj-$(CONFIG_CPU_COPY_FA) += copypage-fa.o
obj-$(CONFIG_CPU_TLB_V3) += tlb-v3.o
obj-$(CONFIG_CPU_TLB_V4WT) += tlb-v4.o
obj-$(CONFIG_CPU_TLB_V4WB) += tlb-v4wb.o
obj-$(CONFIG_CPU_TLB_V4WBI) += tlb-v4wbi.o
......@@ -66,8 +64,6 @@ obj-$(CONFIG_CPU_TLB_FA) += tlb-fa.o
AFLAGS_tlb-v6.o :=-Wa,-march=armv6
AFLAGS_tlb-v7.o :=-Wa,-march=armv7-a
obj-$(CONFIG_CPU_ARM610) += proc-arm6_7.o
obj-$(CONFIG_CPU_ARM710) += proc-arm6_7.o
obj-$(CONFIG_CPU_ARM7TDMI) += proc-arm7tdmi.o
obj-$(CONFIG_CPU_ARM720T) += proc-arm720.o
obj-$(CONFIG_CPU_ARM740T) += proc-arm740.o
......
arch/arm/mm/copypage-v3.c deleted 100644 → 0
View file @ 4175160b
/*
* linux/arch/arm/mm/copypage-v3.c
*
* Copyright (C) 1995-1999 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/highmem.h>
/*
* ARMv3 optimised copy_user_highpage
*
* FIXME: do we need to handle cache stuff...
*/
static void __naked
v3_copy_user_page(void *kto, const void *kfrom)
{
asm("\n\
stmfd sp!, {r4, lr} @ 2\n\
mov r2, %2 @ 1\n\
ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\
1: stmia %1!, {r3, r4, ip, lr} @ 4\n\
ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\
stmia %1!, {r3, r4, ip, lr} @ 4\n\
ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\
stmia %1!, {r3, r4, ip, lr} @ 4\n\
ldmia %0!, {r3, r4, ip, lr} @ 4\n\
subs r2, r2, #1 @ 1\n\
stmia %1!, {r3, r4, ip, lr} @ 4\n\
ldmneia %0!, {r3, r4, ip, lr} @ 4\n\
bne 1b @ 1\n\
ldmfd sp!, {r4, pc} @ 3"
:
: "r" (kfrom), "r" (kto), "I" (PAGE_SIZE / 64));
}
void v3_copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma)
{
void *kto, *kfrom;
kto = kmap_atomic(to);
kfrom = kmap_atomic(from);
v3_copy_user_page(kto, kfrom);
kunmap_atomic(kfrom);
kunmap_atomic(kto);
}
/*
* ARMv3 optimised clear_user_page
*
* FIXME: do we need to handle cache stuff...
*/
void v3_clear_user_highpage(struct page *page, unsigned long vaddr)
{
void *ptr, *kaddr = kmap_atomic(page);
asm volatile("\n\
mov r1, %2 @ 1\n\
mov r2, #0 @ 1\n\
mov r3, #0 @ 1\n\
mov ip, #0 @ 1\n\
mov lr, #0 @ 1\n\
1: stmia %0!, {r2, r3, ip, lr} @ 4\n\
stmia %0!, {r2, r3, ip, lr} @ 4\n\
stmia %0!, {r2, r3, ip, lr} @ 4\n\
stmia %0!, {r2, r3, ip, lr} @ 4\n\
subs r1, r1, #1 @ 1\n\
bne 1b @ 1"
: "=r" (ptr)
: "0" (kaddr), "I" (PAGE_SIZE / 64)
: "r1", "r2", "r3", "ip", "lr");
kunmap_atomic(kaddr);
}
struct cpu_user_fns v3_user_fns __initdata = {
.cpu_clear_user_highpage = v3_clear_user_highpage,
.cpu_copy_user_highpage = v3_copy_user_highpage,
};
arch/arm/mm/fault.c
View file @ 4ab10567
......@@ -432,9 +432,6 @@ do_translation_fault(unsigned long addr, unsigned int fsr,
index = pgd_index(addr);
/*
* FIXME: CP15 C1 is write only on ARMv3 architectures.
*/
pgd = cpu_get_pgd() + index;
pgd_k = init_mm.pgd + index;
......
arch/arm/mm/proc-arm6_7.S deleted 100644 → 0
View file @ 4175160b
/*
* linux/arch/arm/mm/proc-arm6,7.S
*
* Copyright (C) 1997-2000 Russell King
* hacked for non-paged-MM by Hyok S. Choi, 2003.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* These are the low level assembler for performing cache and TLB
* functions on the ARM610 & ARM710.
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/hwcap.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/ptrace.h>
#include "proc-macros.S"
ENTRY(cpu_arm6_dcache_clean_area)
ENTRY(cpu_arm7_dcache_clean_area)
mov pc, lr
/*
* Function: arm6_7_data_abort ()
*
* Params : r2 = pt_regs
* : r4 = aborted context pc
* : r5 = aborted context psr
*
* Purpose : obtain information about current aborted instruction
*
* Returns : r4-r5, r10-r11, r13 preserved
*/
ENTRY(cpu_arm7_data_abort)
mrc p15, 0, r1, c5, c0, 0 @ get FSR
mrc p15, 0, r0, c6, c0, 0 @ get FAR
ldr r8, [r4] @ read arm instruction
tst r8, #1 << 20 @ L = 0 -> write?
orreq r1, r1, #1 << 11 @ yes.
and r7, r8, #15 << 24
add pc, pc, r7, lsr #22 @ Now branch to the relevant processing routine
nop
/* 0 */ b .data_unknown
/* 1 */ b do_DataAbort @ swp
/* 2 */ b .data_unknown
/* 3 */ b .data_unknown
/* 4 */ b .data_arm_lateldrpostconst @ ldr rd, [rn], #m
/* 5 */ b .data_arm_lateldrpreconst @ ldr rd, [rn, #m]
/* 6 */ b .data_arm_lateldrpostreg @ ldr rd, [rn], rm
/* 7 */ b .data_arm_lateldrprereg @ ldr rd, [rn, rm]
/* 8 */ b .data_arm_ldmstm @ ldm*a rn, <rlist>
/* 9 */ b .data_arm_ldmstm @ ldm*b rn, <rlist>
/* a */ b .data_unknown
/* b */ b .data_unknown
/* c */ b do_DataAbort @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m
/* d */ b do_DataAbort @ ldc rd, [rn, #m]
/* e */ b .data_unknown
/* f */
.data_unknown: @ Part of jumptable
mov r0, r4
mov r1, r8
b baddataabort
ENTRY(cpu_arm6_data_abort)
mrc p15, 0, r1, c5, c0, 0 @ get FSR
mrc p15, 0, r0, c6, c0, 0 @ get FAR
ldr r8, [r4] @ read arm instruction
tst r8, #1 << 20 @ L = 0 -> write?
orreq r1, r1, #1 << 11 @ yes.
and r7, r8, #14 << 24
teq r7, #8 << 24 @ was it ldm/stm
bne do_DataAbort
.data_arm_ldmstm:
tst r8, #1 << 21 @ check writeback bit
beq do_DataAbort @ no writeback -> no fixup
mov r7, #0x11
orr r7, r7, #0x1100
and r6, r8, r7
and r9, r8, r7, lsl #1
add r6, r6, r9, lsr #1
and r9, r8, r7, lsl #2
add r6, r6, r9, lsr #2
and r9, r8, r7, lsl #3
add r6, r6, r9, lsr #3
add r6, r6, r6, lsr #8
add r6, r6, r6, lsr #4
and r6, r6, #15 @ r6 = no. of registers to transfer.
and r9, r8, #15 << 16 @ Extract 'n' from instruction
ldr r7, [r2, r9, lsr #14] @ Get register 'Rn'
tst r8, #1 << 23 @ Check U bit
subne r7, r7, r6, lsl #2 @ Undo increment
addeq r7, r7, r6, lsl #2 @ Undo decrement
str r7, [r2, r9, lsr #14] @ Put register 'Rn'
b do_DataAbort
.data_arm_apply_r6_and_rn:
and r9, r8, #15 << 16 @ Extract 'n' from instruction
ldr r7, [r2, r9, lsr #14] @ Get register 'Rn'
tst r8, #1 << 23 @ Check U bit
subne r7, r7, r6 @ Undo incrmenet
addeq r7, r7, r6 @ Undo decrement
str r7, [r2, r9, lsr #14] @ Put register 'Rn'
b do_DataAbort
.data_arm_lateldrpreconst:
tst r8, #1 << 21 @ check writeback bit
beq do_DataAbort @ no writeback -> no fixup
.data_arm_lateldrpostconst:
movs r6, r8, lsl #20 @ Get offset
beq do_DataAbort @ zero -> no fixup
and r9, r8, #15 << 16 @ Extract 'n' from instruction
ldr r7, [r2, r9, lsr #14] @ Get register 'Rn'
tst r8, #1 << 23 @ Check U bit
subne r7, r7, r6, lsr #20 @ Undo increment
addeq r7, r7, r6, lsr #20 @ Undo decrement
str r7, [r2, r9, lsr #14] @ Put register 'Rn'
b do_DataAbort
.data_arm_lateldrprereg:
tst r8, #1 << 21 @ check writeback bit
beq do_DataAbort @ no writeback -> no fixup
.data_arm_lateldrpostreg:
and r7, r8, #15 @ Extract 'm' from instruction
ldr r6, [r2, r7, lsl #2] @ Get register 'Rm'
mov r9, r8, lsr #7 @ get shift count
ands r9, r9, #31
and r7, r8, #0x70 @ get shift type
orreq r7, r7, #8 @ shift count = 0
add pc, pc, r7
nop
mov r6, r6, lsl r9 @ 0: LSL #!0
b .data_arm_apply_r6_and_rn
b .data_arm_apply_r6_and_rn @ 1: LSL #0
nop
b .data_unknown @ 2: MUL?
nop
b .data_unknown @ 3: MUL?
nop
mov r6, r6, lsr r9 @ 4: LSR #!0
b .data_arm_apply_r6_and_rn
mov r6, r6, lsr #32 @ 5: LSR #32
b .data_arm_apply_r6_and_rn
b .data_unknown @ 6: MUL?
nop
b .data_unknown @ 7: MUL?
nop
mov r6, r6, asr r9 @ 8: ASR #!0
b .data_arm_apply_r6_and_rn
mov r6, r6, asr #32 @ 9: ASR #32
b .data_arm_apply_r6_and_rn
b .data_unknown @ A: MUL?
nop
b .data_unknown @ B: MUL?
nop
mov r6, r6, ror r9 @ C: ROR #!0
b .data_arm_apply_r6_and_rn
mov r6, r6, rrx @ D: RRX
b .data_arm_apply_r6_and_rn
b .data_unknown @ E: MUL?
nop
b .data_unknown @ F: MUL?
/*
* Function: arm6_7_proc_init (void)
* : arm6_7_proc_fin (void)
*
* Notes : This processor does not require these
*/
ENTRY(cpu_arm6_proc_init)
ENTRY(cpu_arm7_proc_init)
mov pc, lr
ENTRY(cpu_arm6_proc_fin)
ENTRY(cpu_arm7_proc_fin)
mov r0, #0x31 @ ....S..DP...M
mcr p15, 0, r0, c1, c0, 0 @ disable caches
mov pc, lr
ENTRY(cpu_arm6_do_idle)
ENTRY(cpu_arm7_do_idle)
mov pc, lr
/*
* Function: arm6_7_switch_mm(unsigned long pgd_phys)
* Params : pgd_phys Physical address of page table
* Purpose : Perform a task switch, saving the old processes state, and restoring
* the new.
*/
ENTRY(cpu_arm6_switch_mm)
ENTRY(cpu_arm7_switch_mm)
#ifdef CONFIG_MMU
mov r1, #0
mcr p15, 0, r1, c7, c0, 0 @ flush cache
mcr p15, 0, r0, c2, c0, 0 @ update page table ptr
mcr p15, 0, r1, c5, c0, 0 @ flush TLBs
#endif
mov pc, lr
/*
* Function: arm6_7_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext)
* Params : r0 = Address to set
* : r1 = value to set
* Purpose : Set a PTE and flush it out of any WB cache
*/
.align 5
ENTRY(cpu_arm6_set_pte_ext)
ENTRY(cpu_arm7_set_pte_ext)
#ifdef CONFIG_MMU
armv3_set_pte_ext wc_disable=0
#endif /* CONFIG_MMU */
mov pc, lr
/*
* Function: _arm6_7_reset
* Params : r0 = address to jump to
* Notes : This sets up everything for a reset
*/
.pushsection .idmap.text, "ax"
ENTRY(cpu_arm6_reset)
ENTRY(cpu_arm7_reset)
mov r1, #0
mcr p15, 0, r1, c7, c0, 0 @ flush cache
#ifdef CONFIG_MMU
mcr p15, 0, r1, c5, c0, 0 @ flush TLB
#endif
mov r1, #0x30
mcr p15, 0, r1, c1, c0, 0 @ turn off MMU etc
mov pc, r0
ENDPROC(cpu_arm6_reset)
ENDPROC(cpu_arm7_reset)
.popsection
__CPUINIT
.type __arm6_setup, #function
__arm6_setup: mov r0, #0
mcr p15, 0, r0, c7, c0 @ flush caches on v3
#ifdef CONFIG_MMU
mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
mov r0, #0x3d @ . ..RS BLDP WCAM
orr r0, r0, #0x100 @ . ..01 0011 1101
#else
mov r0, #0x3c @ . ..RS BLDP WCA.
#endif
mov pc, lr
.size __arm6_setup, . - __arm6_setup
.type __arm7_setup, #function
__arm7_setup: mov r0, #0
mcr p15, 0, r0, c7, c0 @ flush caches on v3
#ifdef CONFIG_MMU
mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
mcr p15, 0, r0, c3, c0 @ load domain access register
mov r0, #0x7d @ . ..RS BLDP WCAM
orr r0, r0, #0x100 @ . ..01 0111 1101
#else
mov r0, #0x7c @ . ..RS BLDP WCA.
#endif
mov pc, lr
.size __arm7_setup, . - __arm7_setup
__INITDATA
@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
define_processor_functions arm6, dabort=cpu_arm6_data_abort, pabort=legacy_pabort
define_processor_functions arm7, dabort=cpu_arm7_data_abort, pabort=legacy_pabort
.section ".rodata"
string cpu_arch_name, "armv3"
string cpu_elf_name, "v3"
string cpu_arm6_name, "ARM6"
string cpu_arm610_name, "ARM610"
string cpu_arm7_name, "ARM7"
string cpu_arm710_name, "ARM710"
.align
.section ".proc.info.init", #alloc, #execinstr
.macro arm67_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, \
cpu_mm_mmu_flags:req, cpu_flush:req, cpu_proc_funcs:req
.type __\name\()_proc_info, #object
__\name\()_proc_info:
.long \cpu_val
.long \cpu_mask
.long \cpu_mm_mmu_flags
.long PMD_TYPE_SECT | \
PMD_BIT4 | \
PMD_SECT_AP_WRITE | \
PMD_SECT_AP_READ
b \cpu_flush
.long cpu_arch_name
.long cpu_elf_name
.long HWCAP_SWP | HWCAP_26BIT
.long \cpu_name
.long \cpu_proc_funcs
.long v3_tlb_fns
.long v3_user_fns
.long v3_cache_fns
.size __\name\()_proc_info, . - __\name\()_proc_info
.endm
arm67_proc_info arm6, 0x41560600, 0xfffffff0, cpu_arm6_name, \
0x00000c1e, __arm6_setup, arm6_processor_functions
arm67_proc_info arm610, 0x41560610, 0xfffffff0, cpu_arm610_name, \
0x00000c1e, __arm6_setup, arm6_processor_functions
arm67_proc_info arm7, 0x41007000, 0xffffff00, cpu_arm7_name, \
0x00000c1e, __arm7_setup, arm7_processor_functions
arm67_proc_info arm710, 0x41007100, 0xfff8ff00, cpu_arm710_name, \
PMD_TYPE_SECT | \
PMD_SECT_BUFFERABLE | \
PMD_SECT_CACHEABLE | \
PMD_BIT4 | \
PMD_SECT_AP_WRITE | \
PMD_SECT_AP_READ, \
__arm7_setup, arm7_processor_functions
arch/arm/mm/tlb-v3.S deleted 100644 → 0
View file @ 4175160b
/*
* linux/arch/arm/mm/tlbv3.S
*
* Copyright (C) 1997-2002 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* ARM architecture version 3 TLB handling functions.
*
* Processors: ARM610, ARM710.
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/asm-offsets.h>
#include <asm/tlbflush.h>
#include "proc-macros.S"
.align 5
/*
* v3_flush_user_tlb_range(start, end, mm)
*
* Invalidate a range of TLB entries in the specified address space.
*
* - start - range start address
* - end - range end address
* - mm - mm_struct describing address space
*/
.align 5
ENTRY(v3_flush_user_tlb_range)
vma_vm_mm r2, r2
act_mm r3 @ get current->active_mm
teq r2, r3 @ == mm ?
movne pc, lr @ no, we dont do anything
ENTRY(v3_flush_kern_tlb_range)
bic r0, r0, #0x0ff
bic r0, r0, #0xf00
1: mcr p15, 0, r0, c6, c0, 0 @ invalidate TLB entry
add r0, r0, #PAGE_SZ
cmp r0, r1
blo 1b
mov pc, lr
__INITDATA
/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
define_tlb_functions v3, v3_tlb_flags
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7