diff options
Diffstat (limited to 'arch/powerpc/include/asm/pgalloc-32.h')
| -rw-r--r-- | arch/powerpc/include/asm/pgalloc-32.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgalloc-32.h b/arch/powerpc/include/asm/pgalloc-32.h new file mode 100644 index 00000000..580cf73b --- /dev/null +++ b/arch/powerpc/include/asm/pgalloc-32.h @@ -0,0 +1,48 @@ +#ifndef _ASM_POWERPC_PGALLOC_32_H +#define _ASM_POWERPC_PGALLOC_32_H + +#include <linux/threads.h> + +/* For 32-bit, all levels of page tables are just drawn from get_free_page() */ +#define MAX_PGTABLE_INDEX_SIZE 0 + +extern void __bad_pte(pmd_t *pmd); + +extern pgd_t *pgd_alloc(struct mm_struct *mm); +extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); + +/* + * We don't have any real pmd's, and this code never triggers because + * the pgd will always be present.. + */ +/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */ +#define pmd_free(mm, x) do { } while (0) +#define __pmd_free_tlb(tlb,x,a) do { } while (0) +/* #define pgd_populate(mm, pmd, pte) BUG() */ + +#ifndef CONFIG_BOOKE +#define pmd_populate_kernel(mm, pmd, pte) \ + (pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT) +#define pmd_populate(mm, pmd, pte) \ + (pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT) +#define pmd_pgtable(pmd) pmd_page(pmd) +#else +#define pmd_populate_kernel(mm, pmd, pte) \ + (pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT) +#define pmd_populate(mm, pmd, pte) \ + (pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT) +#define pmd_pgtable(pmd) pmd_page(pmd) +#endif + +extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr); +extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr); + +static inline void pgtable_free(void *table, unsigned index_size) +{ + BUG_ON(index_size); /* 32-bit doesn't use this */ + free_page((unsigned long)table); +} + +#define check_pgt_cache() do { } while (0) + +#endif /* _ASM_POWERPC_PGALLOC_32_H */ |