#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);
+void flush_user_dcache_range(unsigned long, unsigned long);
+void flush_user_icache_range(unsigned long, 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) \
#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 { \
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);
projects / karo-tx-linux.git / blobdiff