#ifndef _PARISC_CACHEFLUSH_H
#define _PARISC_CACHEFLUSH_H
-#include <linux/config.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. */
#define flush_dcache_mmap_unlock(mapping) \
write_unlock_irq(&(mapping)->tree_lock)
-#define flush_icache_page(vma,page) do { flush_kernel_dcache_page(page_address(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)
/* Simple function to work out if we have an existing address translation
* for a user space vma. */
-static inline pte_t *__translation_exists(struct mm_struct *mm,
- unsigned long addr)
+static inline int translation_exists(struct vm_area_struct *vma,
+ unsigned long addr, unsigned long pfn)
{
- pgd_t *pgd = pgd_offset(mm, addr);
+ pgd_t *pgd = pgd_offset(vma->vm_mm, addr);
pmd_t *pmd;
- pte_t *pte;
+ pte_t pte;
if(pgd_none(*pgd))
- return NULL;
+ return 0;
pmd = pmd_offset(pgd, addr);
if(pmd_none(*pmd) || pmd_bad(*pmd))
- return NULL;
+ return 0;
- pte = pte_offset_map(pmd, addr);
+ /* 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 */
- /* The PA flush mappings show up as pte_none, but they're
- * valid none the less */
- if(pte_none(*pte) && ((pte_val(*pte) & _PAGE_FLUSH) == 0))
- return NULL;
- return pte;
-}
-#define translation_exists(vma, addr) __translation_exists((vma)->vm_mm, addr)
+ /* 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
{
BUG_ON(!vma->vm_mm->context);
- if(likely(translation_exists(vma, vmaddr)))
+ if (likely(translation_exists(vma, vmaddr, pfn)))
__flush_cache_page(vma, vmaddr);
}
+
+static inline void
+flush_anon_page(struct page *page, unsigned long vmaddr)
+{
+ if (PageAnon(page))
+ flush_user_dcache_page(vmaddr);
+}
+#define ARCH_HAS_FLUSH_ANON_PAGE
+
+static inline void
+flush_kernel_dcache_page(struct page *page)
+{
+ flush_kernel_dcache_page_asm(page_address(page));
+}
+#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
+
+#ifdef CONFIG_DEBUG_RODATA
+void mark_rodata_ro(void);
#endif
+#endif /* _PARISC_CACHEFLUSH_H */
+