pgalloc.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- #ifndef _PPC64_PGALLOC_H
- #define _PPC64_PGALLOC_H
- #include <linux/threads.h>
- #include <asm/processor.h>
- #include <asm/naca.h>
- #include <asm/paca.h>
- /*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #define quicklists get_paca()
- #define pgd_quicklist (quicklists->pgd_cache)
- #define pmd_quicklist (quicklists->pmd_cache)
- #define pte_quicklist (quicklists->pte_cache)
- #define pgtable_cache_size (quicklists->pgtable_cache_sz)
- static inline pgd_t*
- pgd_alloc_one_fast (struct mm_struct *mm)
- {
- unsigned long *ret = pgd_quicklist;
- if (ret != NULL) {
- pgd_quicklist = (unsigned long *)(*ret);
- ret[0] = 0;
- --pgtable_cache_size;
- } else
- ret = NULL;
- return (pgd_t *) ret;
- }
- static inline pgd_t*
- pgd_alloc (struct mm_struct *mm)
- {
- /* the VM system never calls pgd_alloc_one_fast(), so we do it here. */
- pgd_t *pgd = pgd_alloc_one_fast(mm);
- if (pgd == NULL) {
- pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
- if (pgd != NULL)
- clear_page(pgd);
- }
- return pgd;
- }
- static inline void
- pgd_free (pgd_t *pgd)
- {
- *(unsigned long *)pgd = (unsigned long) pgd_quicklist;
- pgd_quicklist = (unsigned long *) pgd;
- ++pgtable_cache_size;
- }
- #define pgd_populate(MM, PGD, PMD) pgd_set(PGD, PMD)
- static inline pmd_t*
- pmd_alloc_one_fast (struct mm_struct *mm, unsigned long addr)
- {
- unsigned long *ret = (unsigned long *)pmd_quicklist;
- if (ret != NULL) {
- pmd_quicklist = (unsigned long *)(*ret);
- ret[0] = 0;
- --pgtable_cache_size;
- }
- return (pmd_t *)ret;
- }
- static inline pmd_t*
- pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
- {
- pmd_t *pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
- if (pmd != NULL)
- clear_page(pmd);
- return pmd;
- }
- static inline void
- pmd_free (pmd_t *pmd)
- {
- *(unsigned long *)pmd = (unsigned long) pmd_quicklist;
- pmd_quicklist = (unsigned long *) pmd;
- ++pgtable_cache_size;
- }
- #define pmd_populate(MM, PMD, PTE) pmd_set(PMD, PTE)
- static inline pte_t*
- pte_alloc_one_fast (struct mm_struct *mm, unsigned long addr)
- {
- unsigned long *ret = (unsigned long *)pte_quicklist;
- if (ret != NULL) {
- pte_quicklist = (unsigned long *)(*ret);
- ret[0] = 0;
- --pgtable_cache_size;
- }
- return (pte_t *)ret;
- }
- static inline pte_t*
- pte_alloc_one (struct mm_struct *mm, unsigned long addr)
- {
- pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL);
- if (pte != NULL)
- clear_page(pte);
- return pte;
- }
- static inline void
- pte_free (pte_t *pte)
- {
- *(unsigned long *)pte = (unsigned long) pte_quicklist;
- pte_quicklist = (unsigned long *) pte;
- ++pgtable_cache_size;
- }
- extern int do_check_pgt_cache(int, int);
- #endif /* _PPC64_PGALLOC_H */