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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / 5a4d5292779b6163aa41e594a56307e442fbe73c / . / include / asm-avr32 / pgalloc.h
blob: a291f59659cf10f6c6f7ec8306c75f3470eda19e [file] [log] [blame]
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]1/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
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.
7 */
8#ifndef __ASM_AVR32_PGALLOC_H
9#define __ASM_AVR32_PGALLOC_H
10
Haavard Skinnemoen5a4d5292008-01-14 23:33:44 +0100[diff] [blame^]11#include <linux/quicklist.h>
12#include <asm/page.h>
13#include <asm/pgtable.h>
14
15#define QUICK_PGD 0 /* Preserve kernel mappings over free */
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]16
Haavard Skinnemoencfd23e92008-01-14 22:15:05 +0100[diff] [blame]17static inline void pmd_populate_kernel(struct mm_struct *mm,
18 pmd_t *pmd, pte_t *pte)
19{
20 set_pmd(pmd, __pmd((unsigned long)pte));
21}
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]22
Haavard Skinnemoencfd23e92008-01-14 22:15:05 +0100[diff] [blame]23static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
Martin Schwidefsky2f569af2008-02-08 04:22:04 -0800[diff] [blame]24 pgtable_t pte)
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]25{
Haavard Skinnemoencfd23e92008-01-14 22:15:05 +0100[diff] [blame]26 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]27}
Martin Schwidefsky2f569af2008-02-08 04:22:04 -0800[diff] [blame]28#define pmd_pgtable(pmd) pmd_page(pmd)
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]29
Haavard Skinnemoen5a4d5292008-01-14 23:33:44 +0100[diff] [blame^]30static inline void pgd_ctor(void *x)
31{
32 pgd_t *pgd = x;
33
34 memcpy(pgd + USER_PTRS_PER_PGD,
35 swapper_pg_dir + USER_PTRS_PER_PGD,
36 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
37}
38
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]39/*
40 * Allocate and free page tables
41 */
Haavard Skinnemoencfd23e92008-01-14 22:15:05 +0100[diff] [blame]42static inline pgd_t *pgd_alloc(struct mm_struct *mm)
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]43{
Haavard Skinnemoen5a4d5292008-01-14 23:33:44 +0100[diff] [blame^]44 return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]45}
46
Benjamin Herrenschmidt5e541972008-02-04 22:29:14 -0800[diff] [blame]47static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]48{
Haavard Skinnemoen5a4d5292008-01-14 23:33:44 +0100[diff] [blame^]49 quicklist_free(QUICK_PGD, NULL, pgd);
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]50}
51
52static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
53 unsigned long address)
54{
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]55 pte_t *pte;
56
Haavard Skinnemoene7f3bac2007-08-03 13:29:01 +0200[diff] [blame]57 pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]58
59 return pte;
60}
61
62static inline struct page *pte_alloc_one(struct mm_struct *mm,
63 unsigned long address)
64{
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]65 struct page *pte;
66
Haavard Skinnemoene7f3bac2007-08-03 13:29:01 +0200[diff] [blame]67 pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
Martin Schwidefsky2f569af2008-02-08 04:22:04 -0800[diff] [blame]68 if (!pte)
69 return NULL;
70 pgtable_page_ctor(pte);
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]71 return pte;
72}
73
Benjamin Herrenschmidt5e541972008-02-04 22:29:14 -0800[diff] [blame]74static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]75{
76 free_page((unsigned long)pte);
77}
78
Martin Schwidefsky2f569af2008-02-08 04:22:04 -0800[diff] [blame]79static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]80{
Martin Schwidefsky2f569af2008-02-08 04:22:04 -0800[diff] [blame]81 pgtable_page_dtor(pte);
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]82 __free_page(pte);
83}
84
Martin Schwidefsky2f569af2008-02-08 04:22:04 -0800[diff] [blame]85#define __pte_free_tlb(tlb,pte) \
86do { \
87 pgtable_page_dtor(pte); \
88 tlb_remove_page((tlb), pte); \
89} while (0)
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]90
Haavard Skinnemoen5a4d5292008-01-14 23:33:44 +0100[diff] [blame^]91static inline void check_pgt_cache(void)
92{
93 quicklist_trim(QUICK_PGD, NULL, 25, 16);
94}
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700[diff] [blame]95
96#endif /* __ASM_AVR32_PGALLOC_H */