summaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorPaul Mundt <lethal@linux-sh.org>2007-11-08 17:01:42 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-11-08 17:01:42 +0900
commit541c54773173d95c8e99a7378a5bb63125c297f1 (patch)
tree59270b4498d0502f778e26978865e1e8c6eddc54 /arch
parent6d1c76d4e76ef72fce5a7169430ab8f9a68d7924 (diff)
parentaf39c16bd843ee8bde495c8ccb95a5ca209f3051 (diff)
downloadop-kernel-dev-541c54773173d95c8e99a7378a5bb63125c297f1.zip
op-kernel-dev-541c54773173d95c8e99a7378a5bb63125c297f1.tar.gz
Merge branch 'page_colouring_despair'
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/mm/clear_page.S45
-rw-r--r--arch/sh/mm/copy_page.S61
-rw-r--r--arch/sh/mm/pg-sh4.c75
3 files changed, 52 insertions, 129 deletions
diff --git a/arch/sh/mm/clear_page.S b/arch/sh/mm/clear_page.S
index 8a70613..7a7c81e 100644
--- a/arch/sh/mm/clear_page.S
+++ b/arch/sh/mm/clear_page.S
@@ -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
-
diff --git a/arch/sh/mm/copy_page.S b/arch/sh/mm/copy_page.S
index 3d8409d..4068501 100644
--- a/arch/sh/mm/copy_page.S
+++ b/arch/sh/mm/copy_page.S
@@ -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
/*
diff --git a/arch/sh/mm/pg-sh4.c b/arch/sh/mm/pg-sh4.c
index 25f5c6f..8c7a9ca 100644
--- a/arch/sh/mm/pg-sh4.c
+++ b/arch/sh/mm/pg-sh4.c
@@ -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
OpenPOWER on IntegriCloud