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@@ -287,3 +287,75 @@ static inline pgprot_t pgprot_noncached(pgprot_t _prot)
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* Conversion functions: convert a page and protection to a page entry,
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* and a page entry and page directory to the page they refer to.
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*/
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+#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), pgprot)
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+
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+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
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+{
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+ set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) \
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+ | pgprot_val(newprot)));
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+
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+ return pte;
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+}
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+
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+/*
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+ * Conversion functions: convert a page and protection to a page entry,
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+ * and a page entry and page directory to the page they refer to.
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+ */
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+
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+static inline void pmd_set(pmd_t * pmdp, pte_t * ptep)
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+{
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+ pmd_val(*pmdp) = (((unsigned long) ptep) & PAGE_MASK);
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+}
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+
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+#define pmd_page_vaddr(pmd) \
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+ ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
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+
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+#ifndef CONFIG_DISCONTIGMEM
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+#define pmd_page(pmd) (mem_map + ((pmd_val(pmd) >> PAGE_SHIFT) - PFN_BASE))
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+#endif /* !CONFIG_DISCONTIGMEM */
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+
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+/* to find an entry in a page-table-directory. */
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+#define pgd_index(address) \
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+ (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
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+
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+#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
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+
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+/* to find an entry in a kernel page-table-directory */
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+#define pgd_offset_k(address) pgd_offset(&init_mm, address)
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+
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+#define pmd_index(address) \
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+ (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
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+
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+#define pte_index(address) \
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+ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
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+#define pte_offset_kernel(dir, address) \
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+ ((pte_t *)pmd_page_vaddr(*(dir)) + pte_index(address))
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+#define pte_offset_map(dir, address) \
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+ ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
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+#define pte_unmap(pte) do { } while (0)
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+
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+/* Encode and de-code a swap entry */
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+#define __swp_type(x) (((x).val >> 2) & 0x1f)
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+#define __swp_offset(x) ((x).val >> 10)
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+#define __swp_entry(type, offset) \
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+ ((swp_entry_t) { ((type) << 2) | ((offset) << 10) })
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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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+#endif /* !__ASSEMBLY__ */
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+
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+/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
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+#define kern_addr_valid(addr) (1)
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+
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+#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
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+ remap_pfn_range(vma, vaddr, pfn, size, prot)
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+
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+#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
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+#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
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+#define __HAVE_ARCH_PTEP_SET_WRPROTECT
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+#define __HAVE_ARCH_PTE_SAME
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+#include <asm-generic/pgtable.h>
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+
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+#endif /* __KERNEL__ */
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+
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+#endif /* _ASM_M32R_PGTABLE_H */
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李欣儒