diff options
Diffstat (limited to 'include/asm-parisc/cacheflush.h')
-rw-r--r-- | include/asm-parisc/cacheflush.h | 177 |
1 files changed, 33 insertions, 144 deletions
diff --git a/include/asm-parisc/cacheflush.h b/include/asm-parisc/cacheflush.h index a799dd8ef39..ed433da216d 100644 --- a/include/asm-parisc/cacheflush.h +++ b/include/asm-parisc/cacheflush.h @@ -2,60 +2,44 @@ #define _PARISC_CACHEFLUSH_H #include <linux/mm.h> -#include <asm/cache.h> /* for flush_user_dcache_range_asm() proto */ /* The usual comment is "Caches aren't brain-dead on the <architecture>". * Unfortunately, that doesn't apply to PA-RISC. */ -/* Cache flush operations */ - +/* Internal implementation */ +void flush_data_cache_local(void *); /* flushes local data-cache only */ +void flush_instruction_cache_local(void *); /* flushes local code-cache only */ #ifdef CONFIG_SMP -#define flush_cache_mm(mm) flush_cache_all() +void flush_data_cache(void); /* flushes data-cache only (all processors) */ +void flush_instruction_cache(void); /* flushes i-cache only (all processors) */ #else -#define flush_cache_mm(mm) flush_cache_all_local() +#define flush_data_cache() flush_data_cache_local(NULL) +#define flush_instruction_cache() flush_instruction_cache_local(NULL) #endif #define flush_cache_dup_mm(mm) flush_cache_mm(mm) -#define flush_kernel_dcache_range(start,size) \ - flush_kernel_dcache_range_asm((start), (start)+(size)); +void flush_user_icache_range_asm(unsigned long, unsigned long); +void flush_kernel_icache_range_asm(unsigned long, unsigned long); +void flush_user_dcache_range_asm(unsigned long, unsigned long); +void flush_kernel_dcache_range_asm(unsigned long, unsigned long); +void flush_kernel_dcache_page_asm(void *); +void flush_kernel_icache_page(void *); +void flush_user_dcache_page(unsigned long); +void flush_user_icache_page(unsigned long); -extern void flush_cache_all_local(void); +/* Cache flush operations */ -static inline void cacheflush_h_tmp_function(void *dummy) -{ - flush_cache_all_local(); -} +void flush_cache_all_local(void); +void flush_cache_all(void); +void flush_cache_mm(struct mm_struct *mm); -static inline void flush_cache_all(void) -{ - on_each_cpu(cacheflush_h_tmp_function, NULL, 1, 1); -} +#define flush_kernel_dcache_range(start,size) \ + flush_kernel_dcache_range_asm((start), (start)+(size)); #define flush_cache_vmap(start, end) flush_cache_all() #define flush_cache_vunmap(start, end) flush_cache_all() -extern int parisc_cache_flush_threshold; -void parisc_setup_cache_timing(void); - -static inline void -flush_user_dcache_range(unsigned long start, unsigned long end) -{ - if ((end - start) < parisc_cache_flush_threshold) - flush_user_dcache_range_asm(start,end); - else - flush_data_cache(); -} - -static inline void -flush_user_icache_range(unsigned long start, unsigned long end) -{ - if ((end - start) < parisc_cache_flush_threshold) - flush_user_icache_range_asm(start,end); - else - flush_instruction_cache(); -} - extern void flush_dcache_page(struct page *page); #define flush_dcache_mmap_lock(mapping) \ @@ -63,9 +47,15 @@ extern void flush_dcache_page(struct page *page); #define flush_dcache_mmap_unlock(mapping) \ write_unlock_irq(&(mapping)->tree_lock) -#define flush_icache_page(vma,page) do { flush_kernel_dcache_page(page); flush_kernel_icache_page(page_address(page)); } while (0) +#define flush_icache_page(vma,page) do { \ + flush_kernel_dcache_page(page); \ + flush_kernel_icache_page(page_address(page)); \ +} while (0) -#define flush_icache_range(s,e) do { flush_kernel_dcache_range_asm(s,e); flush_kernel_icache_range_asm(s,e); } while (0) +#define flush_icache_range(s,e) do { \ + flush_kernel_dcache_range_asm(s,e); \ + flush_kernel_icache_range_asm(s,e); \ +} while (0) #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { \ @@ -80,118 +70,17 @@ do { \ memcpy(dst, src, len); \ } while (0) -static inline void flush_cache_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) -{ - int sr3; - - if (!vma->vm_mm->context) { - BUG(); - return; - } - - sr3 = mfsp(3); - if (vma->vm_mm->context == sr3) { - flush_user_dcache_range(start,end); - flush_user_icache_range(start,end); - } else { - flush_cache_all(); - } -} - -/* Simple function to work out if we have an existing address translation - * for a user space vma. */ -static inline int translation_exists(struct vm_area_struct *vma, - unsigned long addr, unsigned long pfn) -{ - pgd_t *pgd = pgd_offset(vma->vm_mm, addr); - pmd_t *pmd; - pte_t pte; - - if(pgd_none(*pgd)) - return 0; - - pmd = pmd_offset(pgd, addr); - if(pmd_none(*pmd) || pmd_bad(*pmd)) - return 0; - - /* We cannot take the pte lock here: flush_cache_page is usually - * called with pte lock already held. Whereas flush_dcache_page - * takes flush_dcache_mmap_lock, which is lower in the hierarchy: - * the vma itself is secure, but the pte might come or go racily. - */ - pte = *pte_offset_map(pmd, addr); - /* But pte_unmap() does nothing on this architecture */ - - /* Filter out coincidental file entries and swap entries */ - if (!(pte_val(pte) & (_PAGE_FLUSH|_PAGE_PRESENT))) - return 0; - - return pte_pfn(pte) == pfn; -} - -/* Private function to flush a page from the cache of a non-current - * process. cr25 contains the Page Directory of the current user - * process; we're going to hijack both it and the user space %sr3 to - * temporarily make the non-current process current. We have to do - * this because cache flushing may cause a non-access tlb miss which - * the handlers have to fill in from the pgd of the non-current - * process. */ -static inline void -flush_user_cache_page_non_current(struct vm_area_struct *vma, - unsigned long vmaddr) -{ - /* save the current process space and pgd */ - unsigned long space = mfsp(3), pgd = mfctl(25); - - /* we don't mind taking interrups since they may not - * do anything with user space, but we can't - * be preempted here */ - preempt_disable(); - - /* make us current */ - mtctl(__pa(vma->vm_mm->pgd), 25); - mtsp(vma->vm_mm->context, 3); - - flush_user_dcache_page(vmaddr); - if(vma->vm_flags & VM_EXEC) - flush_user_icache_page(vmaddr); - - /* put the old current process back */ - mtsp(space, 3); - mtctl(pgd, 25); - preempt_enable(); -} - -static inline void -__flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr) -{ - if (likely(vma->vm_mm->context == mfsp(3))) { - flush_user_dcache_page(vmaddr); - if (vma->vm_flags & VM_EXEC) - flush_user_icache_page(vmaddr); - } else { - flush_user_cache_page_non_current(vma, vmaddr); - } -} - -static inline void -flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn) -{ - BUG_ON(!vma->vm_mm->context); - - if (likely(translation_exists(vma, vmaddr, pfn))) - __flush_cache_page(vma, vmaddr); - -} +void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn); +void flush_cache_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +#define ARCH_HAS_FLUSH_ANON_PAGE static inline void flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr) { if (PageAnon(page)) flush_user_dcache_page(vmaddr); } -#define ARCH_HAS_FLUSH_ANON_PAGE #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE void flush_kernel_dcache_page_addr(void *addr); |