mm: dont clear PG_uptodate on truncate/invalidate

[safe/jmp/linux-2.6] / include / asm-mips / page.h

diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index c3b872b..fe7a88e 100644 (file)
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -9,9 +9,6 @@
 #ifndef _ASM_PAGE_H
 #define _ASM_PAGE_H
 
-
-#ifdef __KERNEL__
-
 #include <spaces.h>
 
 /*
@@ -34,7 +31,18 @@
 
 #ifndef __ASSEMBLY__
 
-#include <asm/cpu-features.h>
+#include <linux/pfn.h>
+#include <asm/io.h>
+
+extern void build_clear_page(void);
+extern void build_copy_page(void);
+
+/*
+ * It's normally defined only for FLATMEM config but it's
+ * used in our early mem init code for all memory models.
+ * So always define it.
+ */
+#define ARCH_PFN_OFFSET                PFN_UP(PHYS_OFFSET)
 
 extern void clear_page(void * page);
 extern void copy_page(void * to, void * from);
@@ -59,16 +67,13 @@ static inline void clear_user_page(void *addr, unsigned long vaddr,
                flush_data_cache_page((unsigned long)addr);
 }
 
-static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-       struct page *to)
-{
-       extern void (*flush_data_cache_page)(unsigned long addr);
+extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+       struct page *to);
+struct vm_area_struct;
+extern void copy_user_highpage(struct page *to, struct page *from,
+       unsigned long vaddr, struct vm_area_struct *vma);
 
-       copy_page(vto, vfrom);
-       if (!cpu_has_ic_fills_f_dc ||
-           pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
-               flush_data_cache_page((unsigned long)vto);
-}
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
 
 /*
  * These are used to make use of C type-checking..
@@ -77,15 +82,18 @@ static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
   #ifdef CONFIG_CPU_MIPS32
     typedef struct { unsigned long pte_low, pte_high; } pte_t;
     #define pte_val(x)    ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
+    #define __pte(x)      ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
   #else
      typedef struct { unsigned long long pte; } pte_t;
      #define pte_val(x)        ((x).pte)
+     #define __pte(x)  ((pte_t) { (x) } )
   #endif
 #else
 typedef struct { unsigned long pte; } pte_t;
 #define pte_val(x)     ((x).pte)
-#endif
 #define __pte(x)       ((pte_t) { (x) } )
+#endif
+typedef struct page *pgtable_t;
 
 /*
  * For 3-level pagetables we defines these ourselves, for 2-level the
@@ -129,17 +137,27 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)       (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-
-#define __pa(x)                        ((unsigned long) (x) - PAGE_OFFSET)
-#define __va(x)                        ((void *)((unsigned long) (x) + PAGE_OFFSET))
+/*
+ * __pa()/__va() should be used only during mem init.
+ */
+#ifdef CONFIG_64BIT
+#define __pa(x)                                                                \
+({                                                                     \
+    unsigned long __x = (unsigned long)(x);                            \
+    __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x);                    \
+})
+#else
+#define __pa(x)                                                                \
+    ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
+#endif
+#define __va(x)                ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
+#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
 
 #define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
 
 #ifdef CONFIG_FLATMEM
 
-#define pfn_valid(pfn)         ((pfn) < max_mapnr)
+#define pfn_valid(pfn)         ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr)
 
 #elif defined(CONFIG_SPARSEMEM)
 
@@ -158,8 +176,8 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 
 #endif
 
-#define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#define virt_to_page(kaddr)    pfn_to_page(PFN_DOWN(virt_to_phys(kaddr)))
+#define virt_addr_valid(kaddr) pfn_valid(PFN_DOWN(virt_to_phys(kaddr)))
 
 #define VM_DATA_DEFAULT_FLAGS  (VM_READ | VM_WRITE | VM_EXEC | \
                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
@@ -167,13 +185,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 #define UNCAC_ADDR(addr)       ((addr) - PAGE_OFFSET + UNCAC_BASE)
 #define CAC_ADDR(addr)         ((addr) - UNCAC_BASE + PAGE_OFFSET)
 
-#ifdef CONFIG_LIMITED_DMA
-#define WANT_PAGE_VIRTUAL
-#endif
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/page.h>
 
-#endif /* defined (__KERNEL__) */
-
 #endif /* _ASM_PAGE_H */