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-rw-r--r--arch/sh/include/asm/page.h6
-rw-r--r--arch/sh/include/asm/pgtable.h7
-rw-r--r--arch/sh/include/cpu-sh3/cpu/cacheflush.h5
-rw-r--r--arch/sh/include/cpu-sh4/cpu/cacheflush.h2
-rw-r--r--arch/sh/mm/cache-sh4.c10
-rw-r--r--arch/sh/mm/cache-sh7705.c7
-rw-r--r--arch/sh/mm/pg-sh4.c74
-rw-r--r--arch/sh/mm/pg-sh7705.c52
-rw-r--r--arch/sh/mm/tlb-pteaex.c17
-rw-r--r--arch/sh/mm/tlb-sh3.c20
-rw-r--r--arch/sh/mm/tlb-sh4.c23
11 files changed, 81 insertions, 142 deletions
diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
index 49592c780a6..a31ab40040f 100644
--- a/arch/sh/include/asm/page.h
+++ b/arch/sh/include/asm/page.h
@@ -50,6 +50,12 @@ extern unsigned long shm_align_mask;
extern unsigned long max_low_pfn, min_low_pfn;
extern unsigned long memory_start, memory_end;
+static inline unsigned long
+pages_do_alias(unsigned long addr1, unsigned long addr2)
+{
+ return (addr1 ^ addr2) & shm_align_mask;
+}
+
extern void clear_page(void *to);
extern void copy_page(void *to, void *from);
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index 2a011b18090..d9f68f9c3cb 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -133,13 +133,6 @@ typedef pte_t *pte_addr_t;
*/
#define pgtable_cache_init() do { } while (0)
-#if !defined(CONFIG_CACHE_OFF) && (defined(CONFIG_CPU_SH4) || \
- defined(CONFIG_SH7705_CACHE_32KB))
-struct mm_struct;
-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
-#endif
-
struct vm_area_struct;
extern void update_mmu_cache(struct vm_area_struct * vma,
unsigned long address, pte_t pte);
diff --git a/arch/sh/include/cpu-sh3/cpu/cacheflush.h b/arch/sh/include/cpu-sh3/cpu/cacheflush.h
index 1ac27aae670..6485ad5649a 100644
--- a/arch/sh/include/cpu-sh3/cpu/cacheflush.h
+++ b/arch/sh/include/cpu-sh3/cpu/cacheflush.h
@@ -15,10 +15,7 @@
* SH4. Unlike the SH4 this is a unified cache so we need to do some work
* in mmap when 'exec'ing a new binary
*/
- /* 32KB cache, 4kb PAGE sizes need to check bit 12 */
-#define CACHE_ALIAS 0x00001000
-
-#define PG_mapped PG_arch_1
+#define PG_dcache_dirty PG_arch_1
void flush_cache_all(void);
void flush_cache_mm(struct mm_struct *mm);
diff --git a/arch/sh/include/cpu-sh4/cpu/cacheflush.h b/arch/sh/include/cpu-sh4/cpu/cacheflush.h
index 065306d376e..3564f172219 100644
--- a/arch/sh/include/cpu-sh4/cpu/cacheflush.h
+++ b/arch/sh/include/cpu-sh4/cpu/cacheflush.h
@@ -38,6 +38,6 @@ void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
/* Initialization of P3 area for copy_user_page */
void p3_cache_init(void);
-#define PG_mapped PG_arch_1
+#define PG_dcache_dirty PG_arch_1
#endif /* __ASM_CPU_SH4_CACHEFLUSH_H */
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 5cfe08dbb59..c3a09b27f8d 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -14,6 +14,7 @@
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/mutex.h>
+#include <linux/fs.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
@@ -246,7 +247,14 @@ static inline void flush_cache_4096(unsigned long start,
*/
void flush_dcache_page(struct page *page)
{
- if (test_bit(PG_mapped, &page->flags)) {
+ struct address_space *mapping = page_mapping(page);
+
+#ifndef CONFIG_SMP
+ if (mapping && !mapping_mapped(mapping))
+ set_bit(PG_dcache_dirty, &page->flags);
+ else
+#endif
+ {
unsigned long phys = PHYSADDR(page_address(page));
unsigned long addr = CACHE_OC_ADDRESS_ARRAY;
int i, n;
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index 22dacc77882..fa37bff306b 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -12,6 +12,7 @@
#include <linux/init.h>
#include <linux/mman.h>
#include <linux/mm.h>
+#include <linux/fs.h>
#include <linux/threads.h>
#include <asm/addrspace.h>
#include <asm/page.h>
@@ -128,7 +129,11 @@ static void __uses_jump_to_uncached __flush_dcache_page(unsigned long phys)
*/
void flush_dcache_page(struct page *page)
{
- if (test_bit(PG_mapped, &page->flags))
+ struct address_space *mapping = page_mapping(page);
+
+ if (mapping && !mapping_mapped(mapping))
+ set_bit(PG_dcache_dirty, &page->flags);
+ else
__flush_dcache_page(PHYSADDR(page_address(page)));
}
diff --git a/arch/sh/mm/pg-sh4.c b/arch/sh/mm/pg-sh4.c
index 2fe14da1f83..f3c4b2a54fc 100644
--- a/arch/sh/mm/pg-sh4.c
+++ b/arch/sh/mm/pg-sh4.c
@@ -15,8 +15,6 @@
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
-#define CACHE_ALIAS (current_cpu_data.dcache.alias_mask)
-
#define kmap_get_fixmap_pte(vaddr) \
pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr)), (vaddr))
@@ -68,10 +66,9 @@ 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);
-
clear_page(to);
- if ((((address & PAGE_MASK) ^ (unsigned long)to) & CACHE_ALIAS))
+
+ if (pages_do_alias((unsigned long)to, address & PAGE_MASK))
__flush_wback_region(to, PAGE_SIZE);
}
@@ -79,13 +76,14 @@ 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);
-
- vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
- memcpy(vto, src, len);
- kunmap_coherent(vto);
+ if (page_mapped(page) && !test_bit(PG_dcache_dirty, &page->flags)) {
+ void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ memcpy(vto, src, len);
+ kunmap_coherent(vto);
+ } else {
+ memcpy(dst, src, len);
+ set_bit(PG_dcache_dirty, &page->flags);
+ }
if (vma->vm_flags & VM_EXEC)
flush_cache_page(vma, vaddr, page_to_pfn(page));
@@ -95,13 +93,14 @@ 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);
+ if (page_mapped(page) && !test_bit(PG_dcache_dirty, &page->flags)) {
+ void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ memcpy(dst, vfrom, len);
+ kunmap_coherent(vfrom);
+ } else {
+ memcpy(dst, src, len);
+ set_bit(PG_dcache_dirty, &page->flags);
+ }
}
void copy_user_highpage(struct page *to, struct page *from,
@@ -109,14 +108,19 @@ void copy_user_highpage(struct page *to, struct page *from,
{
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))
+ if (page_mapped(from) && !test_bit(PG_dcache_dirty, &from->flags)) {
+ vfrom = kmap_coherent(from, vaddr);
+ copy_page(vto, vfrom);
+ kunmap_coherent(vfrom);
+ } else {
+ vfrom = kmap_atomic(from, KM_USER0);
+ copy_page(vto, vfrom);
+ kunmap_atomic(vfrom, KM_USER0);
+ }
+
+ if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
__flush_wback_region(vto, PAGE_SIZE);
kunmap_atomic(vto, KM_USER1);
@@ -124,23 +128,3 @@ void copy_user_highpage(struct page *to, struct page *from,
smp_wmb();
}
EXPORT_SYMBOL(copy_user_highpage);
-
-/*
- * For SH-4, we have our own implementation for ptep_get_and_clear
- */
-pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
- pte_t pte = *ptep;
-
- pte_clear(mm, addr, ptep);
- if (!pte_not_present(pte)) {
- unsigned long pfn = pte_pfn(pte);
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
- struct address_space *mapping = page_mapping(page);
- if (!mapping || !mapping_writably_mapped(mapping))
- __clear_bit(PG_mapped, &page->flags);
- }
- }
- return pte;
-}
diff --git a/arch/sh/mm/pg-sh7705.c b/arch/sh/mm/pg-sh7705.c
index eaf25147194..684891b5c8c 100644
--- a/arch/sh/mm/pg-sh7705.c
+++ b/arch/sh/mm/pg-sh7705.c
@@ -26,7 +26,7 @@
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
-static inline void __flush_purge_virtual_region(void *p1, void *virt, int size)
+static void __flush_purge_virtual_region(void *p1, void *virt, int size)
{
unsigned long v;
unsigned long begin, end;
@@ -75,19 +75,13 @@ static inline void __flush_purge_virtual_region(void *p1, void *virt, int size)
*/
void clear_user_page(void *to, unsigned long address, struct page *pg)
{
- struct page *page = virt_to_page(to);
-
- __set_bit(PG_mapped, &page->flags);
- if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
- clear_page(to);
- __flush_wback_region(to, PAGE_SIZE);
- } else {
+ if (pages_do_alias(address, (unsigned long)to))
__flush_purge_virtual_region(to,
(void *)(address & 0xfffff000),
PAGE_SIZE);
- clear_page(to);
- __flush_wback_region(to, PAGE_SIZE);
- }
+
+ clear_page(to);
+ __flush_wback_region(to, PAGE_SIZE);
}
/*
@@ -98,41 +92,11 @@ void clear_user_page(void *to, unsigned long address, struct page *pg)
*/
void copy_user_page(void *to, void *from, unsigned long address, struct page *pg)
{
- struct page *page = virt_to_page(to);
-
-
- __set_bit(PG_mapped, &page->flags);
- if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
- copy_page(to, from);
- __flush_wback_region(to, PAGE_SIZE);
- } else {
+ if (pages_do_alias(address, (unsigned long)to))
__flush_purge_virtual_region(to,
(void *)(address & 0xfffff000),
PAGE_SIZE);
- copy_page(to, from);
- __flush_wback_region(to, PAGE_SIZE);
- }
-}
-/*
- * For SH7705, we have our own implementation for ptep_get_and_clear
- * Copied from pg-sh4.c
- */
-pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
- pte_t pte = *ptep;
-
- pte_clear(mm, addr, ptep);
- if (!pte_not_present(pte)) {
- unsigned long pfn = pte_pfn(pte);
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
- struct address_space *mapping = page_mapping(page);
- if (!mapping || !mapping_writably_mapped(mapping))
- __clear_bit(PG_mapped, &page->flags);
- }
- }
-
- return pte;
+ copy_page(to, from);
+ __flush_wback_region(to, PAGE_SIZE);
}
-
diff --git a/arch/sh/mm/tlb-pteaex.c b/arch/sh/mm/tlb-pteaex.c
index 2aab3ea934d..c39b7736335 100644
--- a/arch/sh/mm/tlb-pteaex.c
+++ b/arch/sh/mm/tlb-pteaex.c
@@ -27,23 +27,6 @@ void update_mmu_cache(struct vm_area_struct * vma,
if (vma && current->active_mm != vma->vm_mm)
return;
-#ifndef CONFIG_CACHE_OFF
- {
- unsigned long pfn = pte_pfn(pte);
-
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
-
- if (!test_bit(PG_mapped, &page->flags)) {
- unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
- __flush_wback_region((void *)P1SEGADDR(phys),
- PAGE_SIZE);
- __set_bit(PG_mapped, &page->flags);
- }
- }
- }
-#endif
-
local_irq_save(flags);
/* Set PTEH register */
diff --git a/arch/sh/mm/tlb-sh3.c b/arch/sh/mm/tlb-sh3.c
index 17cb7c3adf2..9b8459c74ab 100644
--- a/arch/sh/mm/tlb-sh3.c
+++ b/arch/sh/mm/tlb-sh3.c
@@ -33,25 +33,25 @@ void update_mmu_cache(struct vm_area_struct * vma,
unsigned long flags;
unsigned long pteval;
unsigned long vpn;
+ unsigned long pfn = pte_pfn(pte);
+ struct page *page;
/* Ptrace may call this routine. */
if (vma && current->active_mm != vma->vm_mm)
return;
+ page = pfn_to_page(pfn);
+ if (pfn_valid(pfn) && page_mapping(page)) {
#if defined(CONFIG_SH7705_CACHE_32KB)
- {
- struct page *page = pte_page(pte);
- unsigned long pfn = pte_pfn(pte);
+ int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
+ if (dirty) {
+ unsigned long addr = (unsigned long)page_address(page);
- if (pfn_valid(pfn) && !test_bit(PG_mapped, &page->flags)) {
- unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
-
- __flush_wback_region((void *)P1SEGADDR(phys),
- PAGE_SIZE);
- __set_bit(PG_mapped, &page->flags);
+ if (pages_do_alias(addr, address & PAGE_MASK))
+ __flush_wback_region((void *)addr, PAGE_SIZE);
}
- }
#endif
+ }
local_irq_save(flags);
diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c
index f0c7b7397fa..cf50082d243 100644
--- a/arch/sh/mm/tlb-sh4.c
+++ b/arch/sh/mm/tlb-sh4.c
@@ -21,27 +21,26 @@ void update_mmu_cache(struct vm_area_struct * vma,
unsigned long flags;
unsigned long pteval;
unsigned long vpn;
+ unsigned long pfn = pte_pfn(pte);
+ struct page *page;
/* Ptrace may call this routine. */
if (vma && current->active_mm != vma->vm_mm)
return;
-#ifndef CONFIG_CACHE_OFF
- {
- unsigned long pfn = pte_pfn(pte);
+ page = pfn_to_page(pfn);
+ if (pfn_valid(pfn) && page_mapping(page)) {
+#ifndef CONFIG_SMP
+ int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
+ if (dirty) {
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
+ unsigned long addr = (unsigned long)page_address(page);
- if (!test_bit(PG_mapped, &page->flags)) {
- unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
- __flush_wback_region((void *)P1SEGADDR(phys),
- PAGE_SIZE);
- __set_bit(PG_mapped, &page->flags);
- }
+ if (pages_do_alias(addr, address & PAGE_MASK))
+ __flush_wback_region((void *)addr, PAGE_SIZE);
}
- }
#endif
+ }
local_irq_save(flags);