49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
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#ifndef _ASM_POWERPC_PGALLOC_32_H
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#define _ASM_POWERPC_PGALLOC_32_H
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#include <linux/threads.h>
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/* For 32-bit, all levels of page tables are just drawn from get_free_page() */
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#define MAX_PGTABLE_INDEX_SIZE 0
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extern void __bad_pte(pmd_t *pmd);
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
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/*
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* We don't have any real pmd's, and this code never triggers because
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* the pgd will always be present..
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*/
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/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
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#define pmd_free(mm, x) do { } while (0)
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#define __pmd_free_tlb(tlb,x,a) do { } while (0)
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/* #define pgd_populate(mm, pmd, pte) BUG() */
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#ifndef CONFIG_BOOKE
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#define pmd_populate_kernel(mm, pmd, pte) \
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(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
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#define pmd_populate(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
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#define pmd_pgtable(pmd) pmd_page(pmd)
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#else
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#define pmd_populate_kernel(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
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#define pmd_populate(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
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#define pmd_pgtable(pmd) pmd_page(pmd)
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#endif
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
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extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
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static inline void pgtable_free(void *table, unsigned index_size)
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{
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BUG_ON(index_size); /* 32-bit doesn't use this */
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free_page((unsigned long)table);
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}
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#define check_pgt_cache() do { } while (0)
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#endif /* _ASM_POWERPC_PGALLOC_32_H */
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