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Commit 541c5477 authored by Paul Mundt's avatar Paul Mundt
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Merge branch 'page_colouring_despair'

parents 6d1c76d4 af39c16b
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Showing with 73 additions and 137 deletions
arch/sh/mm/clear_page.S
View file @ 541c5477
......@@ -150,48 +150,3 @@ ENTRY(__clear_user)
.long 8b, .Lbad_clear_user
.long 9b, .Lbad_clear_user
.previous
#if defined(CONFIG_CPU_SH4)
/*
* __clear_user_page
* @to: P3 address (with same color)
* @orig_to: P1 address
*
* void __clear_user_page(void *to, void *orig_to)
*/
/*
* r0 --- scratch
* r4 --- to
* r5 --- orig_to
* r6 --- to + PAGE_SIZE
*/
ENTRY(__clear_user_page)
mov.l .Lpsz,r0
mov r4,r6
add r0,r6
mov #0,r0
!
1: ocbi @r5
add #32,r5
movca.l r0,@r4
mov r4,r1
add #32,r4
mov.l r0,@-r4
mov.l r0,@-r4
mov.l r0,@-r4
mov.l r0,@-r4
mov.l r0,@-r4
mov.l r0,@-r4
mov.l r0,@-r4
add #28,r4
cmp/eq r6,r4
bf/s 1b
ocbwb @r1
!
rts
nop
.Lpsz: .long PAGE_SIZE
#endif
arch/sh/mm/copy_page.S
View file @ 541c5477
......@@ -68,67 +68,6 @@ ENTRY(copy_page_slow)
rts
nop
#if defined(CONFIG_CPU_SH4)
/*
* __copy_user_page
* @to: P1 address (with same color)
* @from: P1 address
* @orig_to: P1 address
*
* void __copy_user_page(void *to, void *from, void *orig_to)
*/
/*
* r0, r1, r2, r3, r4, r5, r6, r7 --- scratch
* r8 --- from + PAGE_SIZE
* r9 --- orig_to
* r10 --- to
* r11 --- from
*/
ENTRY(__copy_user_page)
mov.l r8,@-r15
mov.l r9,@-r15
mov.l r10,@-r15
mov.l r11,@-r15
mov r4,r10
mov r5,r11
mov r6,r9
mov r5,r8
mov.l .Lpsz,r0
add r0,r8
!
1: ocbi @r9
add #32,r9
mov.l @r11+,r0
mov.l @r11+,r1
mov.l @r11+,r2
mov.l @r11+,r3
mov.l @r11+,r4
mov.l @r11+,r5
mov.l @r11+,r6
mov.l @r11+,r7
movca.l r0,@r10
mov r10,r0
add #32,r10
mov.l r7,@-r10
mov.l r6,@-r10
mov.l r5,@-r10
mov.l r4,@-r10
mov.l r3,@-r10
mov.l r2,@-r10
mov.l r1,@-r10
ocbwb @r0
cmp/eq r11,r8
bf/s 1b
add #28,r10
!
mov.l @r15+,r11
mov.l @r15+,r10
mov.l @r15+,r9
mov.l @r15+,r8
rts
nop
#endif
.align 2
.Lpsz: .long PAGE_SIZE
/*
......
arch/sh/mm/pg-sh4.c
View file @ 541c5477
......@@ -9,6 +9,8 @@
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/fs.h>
#include <linux/highmem.h>
#include <linux/module.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
......@@ -50,34 +52,61 @@ static inline void kunmap_coherent(struct page *page)
void clear_user_page(void *to, unsigned long address, struct page *page)
{
__set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
clear_page(to);
else {
void *vto = kmap_coherent(page, address);
__clear_user_page(vto, to);
kunmap_coherent(vto);
}
clear_page(to);
if ((((address & PAGE_MASK) ^ (unsigned long)to) & CACHE_ALIAS))
__flush_wback_region(to, PAGE_SIZE);
}
/*
* copy_user_page
* @to: P1 address
* @from: P1 address
* @address: U0 address to be mapped
* @page: page (virt_to_page(to))
*/
void copy_user_page(void *to, void *from, unsigned long address,
struct page *page)
void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
{
void *vto;
__set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
copy_page(to, from);
else {
void *vfrom = kmap_coherent(page, address);
__copy_user_page(vfrom, from, to);
kunmap_coherent(vfrom);
}
vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(vto, src, len);
kunmap_coherent(vto);
if (vma->vm_flags & VM_EXEC)
flush_cache_page(vma, vaddr, page_to_pfn(page));
}
void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
{
void *vfrom;
__set_bit(PG_mapped, &page->flags);
vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(dst, vfrom, len);
kunmap_coherent(vfrom);
}
void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma)
{
void *vfrom, *vto;
__set_bit(PG_mapped, &to->flags);
vto = kmap_atomic(to, KM_USER1);
vfrom = kmap_coherent(from, vaddr);
copy_page(vto, vfrom);
kunmap_coherent(vfrom);
if (((vaddr ^ (unsigned long)vto) & CACHE_ALIAS))
__flush_wback_region(vto, PAGE_SIZE);
kunmap_atomic(vto, KM_USER1);
/* Make sure this page is cleared on other CPU's too before using it */
smp_wmb();
}
EXPORT_SYMBOL(copy_user_highpage);
/*
* For SH-4, we have our own implementation for ptep_get_and_clear
......
include/asm-sh/cacheflush.h
View file @ 541c5477
......@@ -43,21 +43,31 @@ extern void __flush_purge_region(void *start, int size);
extern void __flush_invalidate_region(void *start, int size);
#endif
#define flush_cache_vmap(start, end) flush_cache_all()
#define flush_cache_vunmap(start, end) flush_cache_all()
#ifdef CONFIG_CPU_SH4
extern void copy_to_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr, void *dst, const void *src,
unsigned long len);
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
extern void copy_from_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr, void *dst, const void *src,
unsigned long len);
#else
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
flush_cache_page(vma, vaddr, page_to_pfn(page));\
memcpy(dst, src, len); \
flush_icache_user_range(vma, page, vaddr, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
flush_cache_page(vma, vaddr, page_to_pfn(page));\
memcpy(dst, src, len); \
} while (0)
#endif
#define flush_cache_vmap(start, end) flush_cache_all()
#define flush_cache_vunmap(start, end) flush_cache_all()
#define HAVE_ARCH_UNMAPPED_AREA
......
include/asm-sh/page.h
View file @ 541c5477
......@@ -73,10 +73,13 @@ extern void copy_page_nommu(void *to, void *from);
#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
(defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB))
struct page;
extern void clear_user_page(void *to, unsigned long address, struct page *pg);
extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
extern void __clear_user_page(void *to, void *orig_to);
extern void __copy_user_page(void *to, void *from, void *orig_to);
struct vm_area_struct;
extern void clear_user_page(void *to, unsigned long address, struct page *page);
#ifdef CONFIG_CPU_SH4
extern void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma);
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
#endif
#else
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
......
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