0186f47e70
Refactor the RCU based pte free code that was used on ppc64 to be used on all powerpc. Additionally refactor pte_free() & pte_free_kernel() into common code between ppc32 & ppc64. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
#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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#define PTE_NONCACHE_NUM 0 /* dummy for now to share code w/ppc64 */
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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) 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(pgtable_free_t pgf)
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{
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void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
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free_page((unsigned long)p);
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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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