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authorRussell King <rmk+kernel@arm.linux.org.uk>2012-05-04 12:04:26 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-05-05 05:50:50 +0100
commit357c9c1f07d4546bc3fbc0fd1044d96b114d14ed (patch)
treea355e9cd73ab9f7b536b4c7562d931cfb3f5a885 /arch/arm/lib
parent69964ea4c7b68c9399f7977aa5b9aa6539a6a98a (diff)
downloadlinux-linaro-stable-357c9c1f07d4546bc3fbc0fd1044d96b114d14ed.tar.gz
ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs
This patch removes support for ARMv3 CPUs, which haven't worked properly for quite some time (see the FIXME comment in arch/arm/mm/fault.c). The only V3 parts left is the cache model for ARMv3, which is needed for some odd reason by ARM740T CPUs, and being able to build with -march=armv3, which is required for the RiscPC platform due to its bus structure. Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/lib')
-rw-r--r--arch/arm/lib/Makefile23
-rw-r--r--arch/arm/lib/io-readsw-armv3.S106
-rw-r--r--arch/arm/lib/io-writesw-armv3.S126
-rw-r--r--arch/arm/lib/uaccess.S564
4 files changed, 3 insertions, 816 deletions
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 0ade0acc1ed9..992769ae2599 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -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
diff --git a/arch/arm/lib/io-readsw-armv3.S b/arch/arm/lib/io-readsw-armv3.S
deleted file mode 100644
index 88487c8c4f23..000000000000
--- a/arch/arm/lib/io-readsw-armv3.S
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * 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}
-
-
diff --git a/arch/arm/lib/io-writesw-armv3.S b/arch/arm/lib/io-writesw-armv3.S
deleted file mode 100644
index 49b800419e32..000000000000
--- a/arch/arm/lib/io-writesw-armv3.S
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- * 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}
diff --git a/arch/arm/lib/uaccess.S b/arch/arm/lib/uaccess.S
deleted file mode 100644
index 5c908b1cb8ed..000000000000
--- a/arch/arm/lib/uaccess.S
+++ /dev/null
@@ -1,564 +0,0 @@
-/*
- * linux/arch/arm/lib/uaccess.S
- *
- * Copyright (C) 1995, 1996,1997,1998 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.
- *
- * Routines to block copy data to/from user memory
- * These are highly optimised both for the 4k page size
- * and for various alignments.
- */
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-#include <asm/errno.h>
-#include <asm/domain.h>
-
- .text
-
-#define PAGE_SHIFT 12
-
-/* Prototype: int __copy_to_user(void *to, const char *from, size_t n)
- * Purpose : copy a block to user memory from kernel memory
- * Params : to - user memory
- * : from - kernel memory
- * : n - number of bytes to copy
- * Returns : Number of bytes NOT copied.
- */
-
-.Lc2u_dest_not_aligned:
- rsb ip, ip, #4
- cmp ip, #2
- ldrb r3, [r1], #1
-USER( TUSER( strb) r3, [r0], #1) @ May fault
- ldrgeb r3, [r1], #1
-USER( TUSER( strgeb) r3, [r0], #1) @ May fault
- ldrgtb r3, [r1], #1
-USER( TUSER( strgtb) r3, [r0], #1) @ May fault
- sub r2, r2, ip
- b .Lc2u_dest_aligned
-
-ENTRY(__copy_to_user)
- stmfd sp!, {r2, r4 - r7, lr}
- cmp r2, #4
- blt .Lc2u_not_enough
- ands ip, r0, #3
- bne .Lc2u_dest_not_aligned
-.Lc2u_dest_aligned:
-
- ands ip, r1, #3
- bne .Lc2u_src_not_aligned
-/*
- * Seeing as there has to be at least 8 bytes to copy, we can
- * copy one word, and force a user-mode page fault...
- */
-
-.Lc2u_0fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lc2u_0nowords
- ldr r3, [r1], #4
-USER( TUSER( str) r3, [r0], #4) @ May fault
- mov ip, r0, lsl #32 - PAGE_SHIFT @ On each page, use a ld/st??t instruction
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lc2u_0fupi
-/*
- * ip = max no. of bytes to copy before needing another "strt" insn
- */
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #32
- blt .Lc2u_0rem8lp
-
-.Lc2u_0cpy8lp: ldmia r1!, {r3 - r6}
- stmia r0!, {r3 - r6} @ Shouldnt fault
- ldmia r1!, {r3 - r6}
- subs ip, ip, #32
- stmia r0!, {r3 - r6} @ Shouldnt fault
- bpl .Lc2u_0cpy8lp
-
-.Lc2u_0rem8lp: cmn ip, #16
- ldmgeia r1!, {r3 - r6}
- stmgeia r0!, {r3 - r6} @ Shouldnt fault
- tst ip, #8
- ldmneia r1!, {r3 - r4}
- stmneia r0!, {r3 - r4} @ Shouldnt fault
- tst ip, #4
- ldrne r3, [r1], #4
- TUSER( strne) r3, [r0], #4 @ Shouldnt fault
- ands ip, ip, #3
- beq .Lc2u_0fupi
-.Lc2u_0nowords: teq ip, #0
- beq .Lc2u_finished
-.Lc2u_nowords: cmp ip, #2
- ldrb r3, [r1], #1
-USER( TUSER( strb) r3, [r0], #1) @ May fault
- ldrgeb r3, [r1], #1
-USER( TUSER( strgeb) r3, [r0], #1) @ May fault
- ldrgtb r3, [r1], #1
-USER( TUSER( strgtb) r3, [r0], #1) @ May fault
- b .Lc2u_finished
-
-.Lc2u_not_enough:
- movs ip, r2
- bne .Lc2u_nowords
-.Lc2u_finished: mov r0, #0
- ldmfd sp!, {r2, r4 - r7, pc}
-
-.Lc2u_src_not_aligned:
- bic r1, r1, #3
- ldr r7, [r1], #4
- cmp ip, #2
- bgt .Lc2u_3fupi
- beq .Lc2u_2fupi
-.Lc2u_1fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lc2u_1nowords
- mov r3, r7, pull #8
- ldr r7, [r1], #4
- orr r3, r3, r7, push #24
-USER( TUSER( str) r3, [r0], #4) @ May fault
- mov ip, r0, lsl #32 - PAGE_SHIFT
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lc2u_1fupi
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #16
- blt .Lc2u_1rem8lp
-
-.Lc2u_1cpy8lp: mov r3, r7, pull #8
- ldmia r1!, {r4 - r7}
- subs ip, ip, #16
- orr r3, r3, r4, push #24
- mov r4, r4, pull #8
- orr r4, r4, r5, push #24
- mov r5, r5, pull #8
- orr r5, r5, r6, push #24
- mov r6, r6, pull #8
- orr r6, r6, r7, push #24
- stmia r0!, {r3 - r6} @ Shouldnt fault
- bpl .Lc2u_1cpy8lp
-
-.Lc2u_1rem8lp: tst ip, #8
- movne r3, r7, pull #8
- ldmneia r1!, {r4, r7}
- orrne r3, r3, r4, push #24
- movne r4, r4, pull #8
- orrne r4, r4, r7, push #24
- stmneia r0!, {r3 - r4} @ Shouldnt fault
- tst ip, #4
- movne r3, r7, pull #8
- ldrne r7, [r1], #4
- orrne r3, r3, r7, push #24
- TUSER( strne) r3, [r0], #4 @ Shouldnt fault
- ands ip, ip, #3
- beq .Lc2u_1fupi
-.Lc2u_1nowords: mov r3, r7, get_byte_1
- teq ip, #0
- beq .Lc2u_finished
- cmp ip, #2
-USER( TUSER( strb) r3, [r0], #1) @ May fault
- movge r3, r7, get_byte_2
-USER( TUSER( strgeb) r3, [r0], #1) @ May fault
- movgt r3, r7, get_byte_3
-USER( TUSER( strgtb) r3, [r0], #1) @ May fault
- b .Lc2u_finished
-
-.Lc2u_2fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lc2u_2nowords
- mov r3, r7, pull #16
- ldr r7, [r1], #4
- orr r3, r3, r7, push #16
-USER( TUSER( str) r3, [r0], #4) @ May fault
- mov ip, r0, lsl #32 - PAGE_SHIFT
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lc2u_2fupi
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #16
- blt .Lc2u_2rem8lp
-
-.Lc2u_2cpy8lp: mov r3, r7, pull #16
- ldmia r1!, {r4 - r7}
- subs ip, ip, #16
- orr r3, r3, r4, push #16
- mov r4, r4, pull #16
- orr r4, r4, r5, push #16
- mov r5, r5, pull #16
- orr r5, r5, r6, push #16
- mov r6, r6, pull #16
- orr r6, r6, r7, push #16
- stmia r0!, {r3 - r6} @ Shouldnt fault
- bpl .Lc2u_2cpy8lp
-
-.Lc2u_2rem8lp: tst ip, #8
- movne r3, r7, pull #16
- ldmneia r1!, {r4, r7}
- orrne r3, r3, r4, push #16
- movne r4, r4, pull #16
- orrne r4, r4, r7, push #16
- stmneia r0!, {r3 - r4} @ Shouldnt fault
- tst ip, #4
- movne r3, r7, pull #16
- ldrne r7, [r1], #4
- orrne r3, r3, r7, push #16
- TUSER( strne) r3, [r0], #4 @ Shouldnt fault
- ands ip, ip, #3
- beq .Lc2u_2fupi
-.Lc2u_2nowords: mov r3, r7, get_byte_2
- teq ip, #0
- beq .Lc2u_finished
- cmp ip, #2
-USER( TUSER( strb) r3, [r0], #1) @ May fault
- movge r3, r7, get_byte_3
-USER( TUSER( strgeb) r3, [r0], #1) @ May fault
- ldrgtb r3, [r1], #0
-USER( TUSER( strgtb) r3, [r0], #1) @ May fault
- b .Lc2u_finished
-
-.Lc2u_3fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lc2u_3nowords
- mov r3, r7, pull #24
- ldr r7, [r1], #4
- orr r3, r3, r7, push #8
-USER( TUSER( str) r3, [r0], #4) @ May fault
- mov ip, r0, lsl #32 - PAGE_SHIFT
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lc2u_3fupi
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #16
- blt .Lc2u_3rem8lp
-
-.Lc2u_3cpy8lp: mov r3, r7, pull #24
- ldmia r1!, {r4 - r7}
- subs ip, ip, #16
- orr r3, r3, r4, push #8
- mov r4, r4, pull #24
- orr r4, r4, r5, push #8
- mov r5, r5, pull #24
- orr r5, r5, r6, push #8
- mov r6, r6, pull #24
- orr r6, r6, r7, push #8
- stmia r0!, {r3 - r6} @ Shouldnt fault
- bpl .Lc2u_3cpy8lp
-
-.Lc2u_3rem8lp: tst ip, #8
- movne r3, r7, pull #24
- ldmneia r1!, {r4, r7}
- orrne r3, r3, r4, push #8
- movne r4, r4, pull #24
- orrne r4, r4, r7, push #8
- stmneia r0!, {r3 - r4} @ Shouldnt fault
- tst ip, #4
- movne r3, r7, pull #24
- ldrne r7, [r1], #4
- orrne r3, r3, r7, push #8
- TUSER( strne) r3, [r0], #4 @ Shouldnt fault
- ands ip, ip, #3
- beq .Lc2u_3fupi
-.Lc2u_3nowords: mov r3, r7, get_byte_3
- teq ip, #0
- beq .Lc2u_finished
- cmp ip, #2
-USER( TUSER( strb) r3, [r0], #1) @ May fault
- ldrgeb r3, [r1], #1
-USER( TUSER( strgeb) r3, [r0], #1) @ May fault
- ldrgtb r3, [r1], #0
-USER( TUSER( strgtb) r3, [r0], #1) @ May fault
- b .Lc2u_finished
-ENDPROC(__copy_to_user)
-
- .pushsection .fixup,"ax"
- .align 0
-9001: ldmfd sp!, {r0, r4 - r7, pc}
- .popsection
-
-/* Prototype: unsigned long __copy_from_user(void *to,const void *from,unsigned long n);
- * Purpose : copy a block from user memory to kernel memory
- * Params : to - kernel memory
- * : from - user memory
- * : n - number of bytes to copy
- * Returns : Number of bytes NOT copied.
- */
-.Lcfu_dest_not_aligned:
- rsb ip, ip, #4
- cmp ip, #2
-USER( TUSER( ldrb) r3, [r1], #1) @ May fault
- strb r3, [r0], #1
-USER( TUSER( ldrgeb) r3, [r1], #1) @ May fault
- strgeb r3, [r0], #1
-USER( TUSER( ldrgtb) r3, [r1], #1) @ May fault
- strgtb r3, [r0], #1
- sub r2, r2, ip
- b .Lcfu_dest_aligned
-
-ENTRY(__copy_from_user)
- stmfd sp!, {r0, r2, r4 - r7, lr}
- cmp r2, #4
- blt .Lcfu_not_enough
- ands ip, r0, #3
- bne .Lcfu_dest_not_aligned
-.Lcfu_dest_aligned:
- ands ip, r1, #3
- bne .Lcfu_src_not_aligned
-
-/*
- * Seeing as there has to be at least 8 bytes to copy, we can
- * copy one word, and force a user-mode page fault...
- */
-
-.Lcfu_0fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lcfu_0nowords
-USER( TUSER( ldr) r3, [r1], #4)
- str r3, [r0], #4
- mov ip, r1, lsl #32 - PAGE_SHIFT @ On each page, use a ld/st??t instruction
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lcfu_0fupi
-/*
- * ip = max no. of bytes to copy before needing another "strt" insn
- */
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #32
- blt .Lcfu_0rem8lp
-
-.Lcfu_0cpy8lp: ldmia r1!, {r3 - r6} @ Shouldnt fault
- stmia r0!, {r3 - r6}
- ldmia r1!, {r3 - r6} @ Shouldnt fault
- subs ip, ip, #32
- stmia r0!, {r3 - r6}
- bpl .Lcfu_0cpy8lp
-
-.Lcfu_0rem8lp: cmn ip, #16
- ldmgeia r1!, {r3 - r6} @ Shouldnt fault
- stmgeia r0!, {r3 - r6}
- tst ip, #8
- ldmneia r1!, {r3 - r4} @ Shouldnt fault
- stmneia r0!, {r3 - r4}
- tst ip, #4
- TUSER( ldrne) r3, [r1], #4 @ Shouldnt fault
- strne r3, [r0], #4
- ands ip, ip, #3
- beq .Lcfu_0fupi
-.Lcfu_0nowords: teq ip, #0
- beq .Lcfu_finished
-.Lcfu_nowords: cmp ip, #2
-USER( TUSER( ldrb) r3, [r1], #1) @ May fault
- strb r3, [r0], #1
-USER( TUSER( ldrgeb) r3, [r1], #1) @ May fault
- strgeb r3, [r0], #1
-USER( TUSER( ldrgtb) r3, [r1], #1) @ May fault
- strgtb r3, [r0], #1
- b .Lcfu_finished
-
-.Lcfu_not_enough:
- movs ip, r2
- bne .Lcfu_nowords
-.Lcfu_finished: mov r0, #0
- add sp, sp, #8
- ldmfd sp!, {r4 - r7, pc}
-
-.Lcfu_src_not_aligned:
- bic r1, r1, #3
-USER( TUSER( ldr) r7, [r1], #4) @ May fault
- cmp ip, #2
- bgt .Lcfu_3fupi
- beq .Lcfu_2fupi
-.Lcfu_1fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lcfu_1nowords
- mov r3, r7, pull #8
-USER( TUSER( ldr) r7, [r1], #4) @ May fault
- orr r3, r3, r7, push #24
- str r3, [r0], #4
- mov ip, r1, lsl #32 - PAGE_SHIFT
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lcfu_1fupi
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #16
- blt .Lcfu_1rem8lp
-
-.Lcfu_1cpy8lp: mov r3, r7, pull #8
- ldmia r1!, {r4 - r7} @ Shouldnt fault
- subs ip, ip, #16
- orr r3, r3, r4, push #24
- mov r4, r4, pull #8
- orr r4, r4, r5, push #24
- mov r5, r5, pull #8
- orr r5, r5, r6, push #24
- mov r6, r6, pull #8
- orr r6, r6, r7, push #24
- stmia r0!, {r3 - r6}
- bpl .Lcfu_1cpy8lp
-
-.Lcfu_1rem8lp: tst ip, #8
- movne r3, r7, pull #8
- ldmneia r1!, {r4, r7} @ Shouldnt fault
- orrne r3, r3, r4, push #24
- movne r4, r4, pull #8
- orrne r4, r4, r7, push #24
- stmneia r0!, {r3 - r4}
- tst ip, #4
- movne r3, r7, pull #8
-USER( TUSER( ldrne) r7, [r1], #4) @ May fault
- orrne r3, r3, r7, push #24
- strne r3, [r0], #4
- ands ip, ip, #3
- beq .Lcfu_1fupi
-.Lcfu_1nowords: mov r3, r7, get_byte_1
- teq ip, #0
- beq .Lcfu_finished
- cmp ip, #2
- strb r3, [r0], #1
- movge r3, r7, get_byte_2
- strgeb r3, [r0], #1
- movgt r3, r7, get_byte_3
- strgtb r3, [r0], #1
- b .Lcfu_finished
-
-.Lcfu_2fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lcfu_2nowords
- mov r3, r7, pull #16
-USER( TUSER( ldr) r7, [r1], #4) @ May fault
- orr r3, r3, r7, push #16
- str r3, [r0], #4
- mov ip, r1, lsl #32 - PAGE_SHIFT
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lcfu_2fupi
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #16
- blt .Lcfu_2rem8lp
-
-
-.Lcfu_2cpy8lp: mov r3, r7, pull #16
- ldmia r1!, {r4 - r7} @ Shouldnt fault
- subs ip, ip, #16
- orr r3, r3, r4, push #16
- mov r4, r4, pull #16
- orr r4, r4, r5, push #16
- mov r5, r5, pull #16
- orr r5, r5, r6, push #16
- mov r6, r6, pull #16
- orr r6, r6, r7, push #16
- stmia r0!, {r3 - r6}
- bpl .Lcfu_2cpy8lp
-
-.Lcfu_2rem8lp: tst ip, #8
- movne r3, r7, pull #16
- ldmneia r1!, {r4, r7} @ Shouldnt fault
- orrne r3, r3, r4, push #16
- movne r4, r4, pull #16
- orrne r4, r4, r7, push #16
- stmneia r0!, {r3 - r4}
- tst ip, #4
- movne r3, r7, pull #16
-USER( TUSER( ldrne) r7, [r1], #4) @ May fault
- orrne r3, r3, r7, push #16
- strne r3, [r0], #4
- ands ip, ip, #3
- beq .Lcfu_2fupi
-.Lcfu_2nowords: mov r3, r7, get_byte_2
- teq ip, #0
- beq .Lcfu_finished
- cmp ip, #2
- strb r3, [r0], #1
- movge r3, r7, get_byte_3
- strgeb r3, [r0], #1
-USER( TUSER( ldrgtb) r3, [r1], #0) @ May fault
- strgtb r3, [r0], #1
- b .Lcfu_finished
-
-.Lcfu_3fupi: subs r2, r2, #4
- addmi ip, r2, #4
- bmi .Lcfu_3nowords
- mov r3, r7, pull #24
-USER( TUSER( ldr) r7, [r1], #4) @ May fault
- orr r3, r3, r7, push #8
- str r3, [r0], #4
- mov ip, r1, lsl #32 - PAGE_SHIFT
- rsb ip, ip, #0
- movs ip, ip, lsr #32 - PAGE_SHIFT
- beq .Lcfu_3fupi
- cmp r2, ip
- movlt ip, r2
- sub r2, r2, ip
- subs ip, ip, #16
- blt .Lcfu_3rem8lp
-
-.Lcfu_3cpy8lp: mov r3, r7, pull #24
- ldmia r1!, {r4 - r7} @ Shouldnt fault
- orr r3, r3, r4, push #8
- mov r4, r4, pull #24
- orr r4, r4, r5, push #8
- mov r5, r5, pull #24
- orr r5, r5, r6, push #8
- mov r6, r6, pull #24
- orr r6, r6, r7, push #8
- stmia r0!, {r3 - r6}
- subs ip, ip, #16
- bpl .Lcfu_3cpy8lp
-
-.Lcfu_3rem8lp: tst ip, #8
- movne r3, r7, pull #24
- ldmneia r1!, {r4, r7} @ Shouldnt fault
- orrne r3, r3, r4, push #8
- movne r4, r4, pull #24
- orrne r4, r4, r7, push #8
- stmneia r0!, {r3 - r4}
- tst ip, #4
- movne r3, r7, pull #24
-USER( TUSER( ldrne) r7, [r1], #4) @ May fault
- orrne r3, r3, r7, push #8
- strne r3, [r0], #4
- ands ip, ip, #3
- beq .Lcfu_3fupi
-.Lcfu_3nowords: mov r3, r7, get_byte_3
- teq ip, #0
- beq .Lcfu_finished
- cmp ip, #2
- strb r3, [r0], #1
-USER( TUSER( ldrgeb) r3, [r1], #1) @ May fault
- strgeb r3, [r0], #1
-USER( TUSER( ldrgtb) r3, [r1], #1) @ May fault
- strgtb r3, [r0], #1
- b .Lcfu_finished
-ENDPROC(__copy_from_user)
-
- .pushsection .fixup,"ax"
- .align 0
- /*
- * We took an exception. r0 contains a pointer to
- * the byte not copied.
- */
-9001: ldr r2, [sp], #4 @ void *to
- sub r2, r0, r2 @ bytes copied
- ldr r1, [sp], #4 @ unsigned long count
- subs r4, r1, r2 @ bytes left to copy
- movne r1, r4
- blne __memzero
- mov r0, r4
- ldmfd sp!, {r4 - r7, pc}
- .popsection
-