[ALSA] oxygen: generalize handling of DAC volume limits
[linux/fpc-iii.git] / include / asm-x86 / pgalloc_32.h
blob6bea6e5b5ee55044dd06bea1b55677bf9cba20bf
1 #ifndef _I386_PGALLOC_H
2 #define _I386_PGALLOC_H
4 #include <linux/threads.h>
5 #include <linux/mm.h> /* for struct page */
6 #include <linux/pagemap.h>
7 #include <asm/tlb.h>
8 #include <asm-generic/tlb.h>
10 #ifdef CONFIG_PARAVIRT
11 #include <asm/paravirt.h>
12 #else
13 #define paravirt_alloc_pt(mm, pfn) do { } while (0)
14 #define paravirt_alloc_pd(mm, pfn) do { } while (0)
15 #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
16 #define paravirt_release_pt(pfn) do { } while (0)
17 #define paravirt_release_pd(pfn) do { } while (0)
18 #endif
20 static inline void pmd_populate_kernel(struct mm_struct *mm,
21 pmd_t *pmd, pte_t *pte)
23 paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT);
24 set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
27 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
29 unsigned long pfn = page_to_pfn(pte);
31 paravirt_alloc_pt(mm, pfn);
32 set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
34 #define pmd_pgtable(pmd) pmd_page(pmd)
37 * Allocate and free page tables.
39 extern pgd_t *pgd_alloc(struct mm_struct *);
40 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
42 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
43 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
45 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
47 free_page((unsigned long)pte);
50 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
52 pgtable_page_dtor(pte);
53 __free_page(pte);
57 extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
59 #ifdef CONFIG_X86_PAE
61 * In the PAE case we free the pmds as part of the pgd.
63 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
65 return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
68 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
70 BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
71 free_page((unsigned long)pmd);
74 extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
76 static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd)
78 paravirt_alloc_pd(mm, __pa(pmd) >> PAGE_SHIFT);
80 /* Note: almost everything apart from _PAGE_PRESENT is
81 reserved at the pmd (PDPT) level. */
82 set_pud(pudp, __pud(__pa(pmd) | _PAGE_PRESENT));
85 * According to Intel App note "TLBs, Paging-Structure Caches,
86 * and Their Invalidation", April 2007, document 317080-001,
87 * section 8.1: in PAE mode we explicitly have to flush the
88 * TLB via cr3 if the top-level pgd is changed...
90 if (mm == current->active_mm)
91 write_cr3(read_cr3());
93 #endif /* CONFIG_X86_PAE */
95 #endif /* _I386_PGALLOC_H */