diff options
| author | Stuart Menefy <stuart.menefy@st.com> | 2006-11-21 15:38:05 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2006-12-06 10:45:38 +0900 |
| commit | 99a596f93be10001c50894bcab69e458a49a3b8c (patch) | |
| tree | 16faf593cc3f7a2c39f3079f0f64f410e530e1c4 /include/asm-sh/pgalloc.h | |
| parent | 6e4662ff49c6b94e16a47bfddb920576963b5a20 (diff) | |
sh: pmd rework.
Remove extra bits from the pmd structure and store a kernel logical
address rather than a physical address. This allows it to be directly
dereferenced. Another piece of wierdness inherited from x86.
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/pgalloc.h')
| -rw-r--r-- | include/asm-sh/pgalloc.h | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/include/asm-sh/pgalloc.h b/include/asm-sh/pgalloc.h index e841465ab4d2..888e4529e6fe 100644 --- a/include/asm-sh/pgalloc.h +++ b/include/asm-sh/pgalloc.h @@ -1,13 +1,16 @@ #ifndef __ASM_SH_PGALLOC_H #define __ASM_SH_PGALLOC_H -#define pmd_populate_kernel(mm, pmd, pte) \ - set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))) +static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, + pte_t *pte) +{ + set_pmd(pmd, __pmd((unsigned long)pte)); +} static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte) { - set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte))); + set_pmd(pmd, __pmd((unsigned long)page_address(pte))); } /* @@ -15,7 +18,16 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, */ static inline pgd_t *pgd_alloc(struct mm_struct *mm) { - return (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); + pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT); + + if (pgd) { + memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t)); + memcpy(pgd + USER_PTRS_PER_PGD, + swapper_pg_dir + USER_PTRS_PER_PGD, + (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); + } + + return pgd; } static inline void pgd_free(pgd_t *pgd) |