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@@ -316,3 +316,64 @@ extern inline pte_t * pte_offset_kernel(pmd_t * dir, unsigned long address)
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+ ((address >> PAGE_SHIFT) & (PTRS_PER_PAGE - 1));
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smp_read_barrier_depends(); /* see above */
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return ret;
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+}
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+
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+#define pte_offset_map(dir,addr) pte_offset_kernel((dir),(addr))
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+#define pte_unmap(pte) do { } while (0)
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+
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+extern pgd_t swapper_pg_dir[1024];
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+
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+/*
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+ * The Alpha doesn't have any external MMU info: the kernel page
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+ * tables contain all the necessary information.
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+ */
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+extern inline void update_mmu_cache(struct vm_area_struct * vma,
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+ unsigned long address, pte_t *ptep)
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+{
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+}
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+
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+/*
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+ * Non-present pages: high 24 bits are offset, next 8 bits type,
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+ * low 32 bits zero.
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+ */
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+extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
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+{ pte_t pte; pte_val(pte) = (type << 32) | (offset << 40); return pte; }
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+
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+#define __swp_type(x) (((x).val >> 32) & 0xff)
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+#define __swp_offset(x) ((x).val >> 40)
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+#define __swp_entry(type, off) ((swp_entry_t) { pte_val(mk_swap_pte((type), (off))) })
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+#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
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+#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
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+
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+#define pte_to_pgoff(pte) (pte_val(pte) >> 32)
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+#define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE })
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+
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+#define PTE_FILE_MAX_BITS 32
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+
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+#ifndef CONFIG_DISCONTIGMEM
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+#define kern_addr_valid(addr) (1)
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+#endif
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+
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+#define io_remap_pfn_range(vma, start, pfn, size, prot) \
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+ remap_pfn_range(vma, start, pfn, size, prot)
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+
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+#define pte_ERROR(e) \
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+ printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
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+#define pmd_ERROR(e) \
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+ printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
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+#define pgd_ERROR(e) \
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+ printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
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+
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+extern void paging_init(void);
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+
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+#include <asm-generic/pgtable.h>
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+
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+/*
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+ * No page table caches to initialise
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+ */
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+#define pgtable_cache_init() do { } while (0)
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+
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+/* We have our own get_unmapped_area to cope with ADDR_LIMIT_32BIT. */
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+#define HAVE_ARCH_UNMAPPED_AREA
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+
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+#endif /* _ALPHA_PGTABLE_H */
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