#ifndef _ASM_PAGE_H
#define _ASM_PAGE_H
-#include <linux/config.h>
#ifdef __KERNEL__
#define PAGE_SHIFT 16
#endif
#define PAGE_SIZE (1UL << PAGE_SHIFT)
-#define PAGE_MASK (~(PAGE_SIZE-1))
+#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
#ifndef __ASSEMBLY__
+#include <linux/pfn.h>
+#include <asm/io.h>
+
extern void clear_page(void * page);
extern void copy_page(void * to, void * from);
extern void (*flush_data_cache_page)(unsigned long addr);
clear_page(addr);
- if (pages_do_alias((unsigned long) addr, vaddr))
+ if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
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 (pages_do_alias((unsigned long)vto, vaddr))
- flush_data_cache_page((unsigned long)vto);
-}
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
/*
* These are used to make use of C type-checking..
*/
#ifdef CONFIG_64BIT_PHYS_ADDR
-typedef struct { unsigned long long pte; } pte_t;
+ #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)
+#define __pte(x) ((pte_t) { (x) } )
#endif
-typedef struct { unsigned long pmd; } pmd_t;
-typedef struct { unsigned long pgd; } pgd_t;
-typedef struct { unsigned long pgprot; } pgprot_t;
-#define pte_val(x) ((x).pte)
+/*
+ * For 3-level pagetables we defines these ourselves, for 2-level the
+ * definitions are supplied by <asm-generic/pgtable-nopmd.h>.
+ */
+#ifdef CONFIG_64BIT
+
+typedef struct { unsigned long pmd; } pmd_t;
#define pmd_val(x) ((x).pmd)
-#define pgd_val(x) ((x).pgd)
-#define pgprot_val(x) ((x).pgprot)
+#define __pmd(x) ((pmd_t) { (x) } )
-#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
+#endif
-#define __pte(x) ((pte_t) { (x) } )
-#define __pmd(x) ((pmd_t) { (x) } )
+/*
+ * Right now we don't support 4-level pagetables, so all pud-related
+ * definitions come from <asm-generic/pgtable-nopud.h>.
+ */
+
+/*
+ * Finall the top of the hierarchy, the pgd
+ */
+typedef struct { unsigned long pgd; } pgd_t;
+#define pgd_val(x) ((x).pgd)
#define __pgd(x) ((pgd_t) { (x) } )
+
+/*
+ * Manipulate page protection bits
+ */
+typedef struct { unsigned long pgprot; } pgprot_t;
+#define pgprot_val(x) ((x).pgprot)
#define __pgprot(x) ((pgprot_t) { (x) } )
-/* Pure 2^n version of get_order */
-static __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
+/*
+ * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd
+ * pair of pages we only have a single global bit per pair of pages. When
+ * writing to the TLB make sure we always have the bit set for both pages
+ * or none. This macro is used to access the `buddy' of the pte we're just
+ * working on.
+ */
+#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_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))
+#if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64)
+#define __pa_page_offset(x) ((unsigned long)(x) < CKSEG0 ? PAGE_OFFSET : CKSEG0)
+#else
+#define __pa_page_offset(x) PAGE_OFFSET
+#endif
+#define __pa(x) ((unsigned long)(x) - __pa_page_offset(x))
+#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0))
+#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-#ifndef CONFIG_DISCONTIGMEM
-#define pfn_to_page(pfn) (mem_map + (pfn))
-#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
+#ifdef CONFIG_FLATMEM
+
#define pfn_valid(pfn) ((pfn) < max_mapnr)
+
+#elif defined(CONFIG_SPARSEMEM)
+
+/* pfn_valid is defined in linux/mmzone.h */
+
+#elif defined(CONFIG_NEED_MULTIPLE_NODES)
+
+#define pfn_valid(pfn) \
+({ \
+ unsigned long __pfn = (pfn); \
+ int __n = pfn_to_nid(__pfn); \
+ ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
+ NODE_DATA(__n)->node_spanned_pages) \
+ : 0); \
+})
+
#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)
#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)
-#endif /* defined (__KERNEL__) */
-
#ifdef CONFIG_LIMITED_DMA
#define WANT_PAGE_VIRTUAL
#endif
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
+
+#endif /* defined (__KERNEL__) */
+
+#define devmem_is_allowed(x) 1
+
#endif /* _ASM_PAGE_H */
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