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/arch/powerpc/include/asm/pgalloc-32.h

https://github.com/aicjofs/android_kernel_lge_v500_20d_f2fs
C Header | 48 lines | 31 code | 10 blank | 7 comment | 3 complexity | 7d05852b186aea5e291534d240d5536c MD5 | raw file
 1#ifndef _ASM_POWERPC_PGALLOC_32_H
 2#define _ASM_POWERPC_PGALLOC_32_H
 3
 4#include <linux/threads.h>
 5
 6/* For 32-bit, all levels of page tables are just drawn from get_free_page() */
 7#define MAX_PGTABLE_INDEX_SIZE	0
 8
 9extern void __bad_pte(pmd_t *pmd);
10
11extern pgd_t *pgd_alloc(struct mm_struct *mm);
12extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
13
14/*
15 * We don't have any real pmd's, and this code never triggers because
16 * the pgd will always be present..
17 */
18/* #define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); }) */
19#define pmd_free(mm, x) 		do { } while (0)
20#define __pmd_free_tlb(tlb,x,a)		do { } while (0)
21/* #define pgd_populate(mm, pmd, pte)      BUG() */
22
23#ifndef CONFIG_BOOKE
24#define pmd_populate_kernel(mm, pmd, pte)	\
25		(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
26#define pmd_populate(mm, pmd, pte)	\
27		(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
28#define pmd_pgtable(pmd) pmd_page(pmd)
29#else
30#define pmd_populate_kernel(mm, pmd, pte)	\
31		(pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
32#define pmd_populate(mm, pmd, pte)	\
33		(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
34#define pmd_pgtable(pmd) pmd_page(pmd)
35#endif
36
37extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
38extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
39
40static inline void pgtable_free(void *table, unsigned index_size)
41{
42	BUG_ON(index_size); /* 32-bit doesn't use this */
43	free_page((unsigned long)table);
44}
45
46#define check_pgt_cache()	do { } while (0)
47
48#endif /* _ASM_POWERPC_PGALLOC_32_H */