2 * Copyright (C) 2004-2006 Atmel Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 #ifndef __ASM_AVR32_PGALLOC_H
9 #define __ASM_AVR32_PGALLOC_H
11 #include <linux/quicklist.h>
13 #include <asm/pgtable.h>
15 #define QUICK_PGD 0 /* Preserve kernel mappings over free */
16 #define QUICK_PT 1 /* Zero on free */
18 static inline void pmd_populate_kernel(struct mm_struct *mm,
19 pmd_t *pmd, pte_t *pte)
21 set_pmd(pmd, __pmd((unsigned long)pte));
24 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
27 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
29 #define pmd_pgtable(pmd) pmd_page(pmd)
31 static inline void pgd_ctor(void *x)
35 memcpy(pgd + USER_PTRS_PER_PGD,
36 swapper_pg_dir + USER_PTRS_PER_PGD,
37 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
41 * Allocate and free page tables
43 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
45 return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
48 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
50 quicklist_free(QUICK_PGD, NULL, pgd);
53 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
54 unsigned long address)
56 return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
59 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
60 unsigned long address)
65 pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
69 page = virt_to_page(pg);
70 pgtable_page_ctor(page);
75 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
77 quicklist_free(QUICK_PT, NULL, pte);
80 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
82 pgtable_page_dtor(pte);
83 quicklist_free_page(QUICK_PT, NULL, pte);
86 #define __pte_free_tlb(tlb,pte) \
88 pgtable_page_dtor(pte); \
89 tlb_remove_page((tlb), pte); \
92 static inline void check_pgt_cache(void)
94 quicklist_trim(QUICK_PGD, NULL, 25, 16);
95 quicklist_trim(QUICK_PT, NULL, 25, 16);
98 #endif /* __ASM_AVR32_PGALLOC_H */