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author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-08-07 09:55:16 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-08-07 09:55:16 +0100 |
commit | a1b81a84fff05dbfef45b7012c26e1fee9973e5d (patch) | |
tree | 3d053e76542ad4d20bd83ad35c13eabff97003ab /arch/avr32/include/asm/pgalloc.h | |
parent | 4fb8af10d0fd09372d52966b76922b9e82bbc950 (diff) | |
parent | 3663b736a5083b3bce74520b637f630f01f66a7f (diff) |
Merge branch 'header-move' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6
Diffstat (limited to 'arch/avr32/include/asm/pgalloc.h')
-rw-r--r-- | arch/avr32/include/asm/pgalloc.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/pgalloc.h b/arch/avr32/include/asm/pgalloc.h new file mode 100644 index 00000000000..64082132394 --- /dev/null +++ b/arch/avr32/include/asm/pgalloc.h @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_PGALLOC_H +#define __ASM_AVR32_PGALLOC_H + +#include <linux/quicklist.h> +#include <asm/page.h> +#include <asm/pgtable.h> + +#define QUICK_PGD 0 /* Preserve kernel mappings over free */ +#define QUICK_PT 1 /* Zero on free */ + +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, + pgtable_t pte) +{ + set_pmd(pmd, __pmd((unsigned long)page_address(pte))); +} +#define pmd_pgtable(pmd) pmd_page(pmd) + +static inline void pgd_ctor(void *x) +{ + pgd_t *pgd = x; + + memcpy(pgd + USER_PTRS_PER_PGD, + swapper_pg_dir + USER_PTRS_PER_PGD, + (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); +} + +/* + * Allocate and free page tables + */ +static inline pgd_t *pgd_alloc(struct mm_struct *mm) +{ + return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor); +} + +static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + quicklist_free(QUICK_PGD, NULL, pgd); +} + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) +{ + return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); +} + +static inline pgtable_t pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + struct page *page; + void *pg; + + pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); + if (!pg) + return NULL; + + page = virt_to_page(pg); + pgtable_page_ctor(page); + + return page; +} + +static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) +{ + quicklist_free(QUICK_PT, NULL, pte); +} + +static inline void pte_free(struct mm_struct *mm, pgtable_t pte) +{ + pgtable_page_dtor(pte); + quicklist_free_page(QUICK_PT, NULL, pte); +} + +#define __pte_free_tlb(tlb,pte) \ +do { \ + pgtable_page_dtor(pte); \ + tlb_remove_page((tlb), pte); \ +} while (0) + +static inline void check_pgt_cache(void) +{ + quicklist_trim(QUICK_PGD, NULL, 25, 16); + quicklist_trim(QUICK_PT, NULL, 25, 16); +} + +#endif /* __ASM_AVR32_PGALLOC_H */ |