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author | Steven Whitehouse <swhiteho@redhat.com> | 2006-09-28 08:29:59 -0400 |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-09-28 08:29:59 -0400 |
commit | 185a257f2f73bcd89050ad02da5bedbc28fc43fa (patch) | |
tree | 5e32586114534ed3f2165614cba3d578f5d87307 /include/asm-avr32/pgalloc.h | |
parent | 3f1a9aaeffd8d1cbc5ab9776c45cbd66af1c9699 (diff) | |
parent | a77c64c1a641950626181b4857abb701d8f38ccc (diff) | |
download | op-kernel-dev-185a257f2f73bcd89050ad02da5bedbc28fc43fa.zip op-kernel-dev-185a257f2f73bcd89050ad02da5bedbc28fc43fa.tar.gz |
Merge branch 'master' into gfs2
Diffstat (limited to 'include/asm-avr32/pgalloc.h')
-rw-r--r-- | include/asm-avr32/pgalloc.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/include/asm-avr32/pgalloc.h b/include/asm-avr32/pgalloc.h new file mode 100644 index 0000000..7492cfb --- /dev/null +++ b/include/asm-avr32/pgalloc.h @@ -0,0 +1,96 @@ +/* + * 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 <asm/processor.h> +#include <linux/threads.h> +#include <linux/slab.h> +#include <linux/mm.h> + +#define pmd_populate_kernel(mm, pmd, pte) \ + set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(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))); +} + +/* + * Allocate and free page tables + */ +static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm) +{ + unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t)); + pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL); + + if (pgd) + memset(pgd, 0, pgd_size); + + return pgd; +} + +static inline void pgd_free(pgd_t *pgd) +{ + kfree(pgd); +} + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) +{ + int count = 0; + pte_t *pte; + + do { + pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT); + if (pte) + clear_page(pte); + else { + current->state = TASK_UNINTERRUPTIBLE; + schedule_timeout(HZ); + } + } while (!pte && (count++ < 10)); + + return pte; +} + +static inline struct page *pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + int count = 0; + struct page *pte; + + do { + pte = alloc_pages(GFP_KERNEL, 0); + if (pte) + clear_page(page_address(pte)); + else { + current->state = TASK_UNINTERRUPTIBLE; + schedule_timeout(HZ); + } + } while (!pte && (count++ < 10)); + + return pte; +} + +static inline void pte_free_kernel(pte_t *pte) +{ + free_page((unsigned long)pte); +} + +static inline void pte_free(struct page *pte) +{ + __free_page(pte); +} + +#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) + +#define check_pgt_cache() do { } while(0) + +#endif /* __ASM_AVR32_PGALLOC_H */ |