diff options
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/include/asm/page.h | 6 | ||||
| -rw-r--r-- | arch/sh/include/asm/pgtable.h | 7 | ||||
| -rw-r--r-- | arch/sh/include/cpu-sh3/cpu/cacheflush.h | 5 | ||||
| -rw-r--r-- | arch/sh/include/cpu-sh4/cpu/cacheflush.h | 2 | ||||
| -rw-r--r-- | arch/sh/mm/cache-sh4.c | 10 | ||||
| -rw-r--r-- | arch/sh/mm/cache-sh7705.c | 7 | ||||
| -rw-r--r-- | arch/sh/mm/pg-sh4.c | 74 | ||||
| -rw-r--r-- | arch/sh/mm/pg-sh7705.c | 52 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-pteaex.c | 17 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-sh3.c | 20 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-sh4.c | 23 |
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); |