fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sh64 / pgalloc.h
blob6eccab770a6d9a05582041c782bc365a5b8bdb39
1 #ifndef __ASM_SH64_PGALLOC_H
2 #define __ASM_SH64_PGALLOC_H
4 /*
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
9 * include/asm-sh64/pgalloc.h
11 * Copyright (C) 2000, 2001 Paolo Alberelli
12 * Copyright (C) 2003, 2004 Paul Mundt
13 * Copyright (C) 2003, 2004 Richard Curnow
17 #include <linux/mm.h>
18 #include <linux/quicklist.h>
19 #include <asm/page.h>
21 static inline void pgd_init(unsigned long page)
23 unsigned long *pgd = (unsigned long *)page;
24 extern pte_t empty_bad_pte_table[PTRS_PER_PTE];
25 int i;
27 for (i = 0; i < USER_PTRS_PER_PGD; i++)
28 pgd[i] = (unsigned long)empty_bad_pte_table;
32 * Allocate and free page tables. The xxx_kernel() versions are
33 * used to allocate a kernel page table - this turns on ASN bits
34 * if any.
37 static inline pgd_t *get_pgd_slow(void)
39 unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
40 pgd_t *ret = kmalloc(pgd_size, GFP_KERNEL);
41 return ret;
44 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
46 return quicklist_alloc(0, GFP_KERNEL, NULL);
49 static inline void pgd_free(pgd_t *pgd)
51 quicklist_free(0, NULL, pgd);
54 static inline struct page *pte_alloc_one(struct mm_struct *mm,
55 unsigned long address)
57 void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
58 return pg ? virt_to_page(pg) : NULL;
61 static inline void pte_free_kernel(pte_t *pte)
63 quicklist_free(0, NULL, pte);
66 static inline void pte_free(struct page *pte)
68 quicklist_free_page(0, NULL, pte);
71 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
72 unsigned long address)
74 return quicklist_alloc(0, GFP_KERNEL, NULL);
77 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
80 * allocating and freeing a pmd is trivial: the 1-entry pmd is
81 * inside the pgd, so has no extra memory associated with it.
84 #if defined(CONFIG_SH64_PGTABLE_2_LEVEL)
86 #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
87 #define pmd_free(x) do { } while (0)
88 #define pgd_populate(mm, pmd, pte) BUG()
89 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
90 #define __pmd_free_tlb(tlb,pmd) do { } while (0)
92 #elif defined(CONFIG_SH64_PGTABLE_3_LEVEL)
94 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
96 return quicklist_alloc(0, GFP_KERNEL, NULL);
99 static inline void pmd_free(pmd_t *pmd)
101 quicklist_free(0, NULL, pmd);
104 #define pgd_populate(mm, pgd, pmd) pgd_set(pgd, pmd)
105 #define __pmd_free_tlb(tlb,pmd) pmd_free(pmd)
107 #else
108 #error "No defined page table size"
109 #endif
111 #define pmd_populate_kernel(mm, pmd, pte) \
112 set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) (pte)))
114 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
115 struct page *pte)
117 set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) page_address (pte)));
120 static inline void check_pgt_cache(void)
122 quicklist_trim(0, NULL, 25, 16);
125 #endif /* __ASM_SH64_PGALLOC_H */