Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _I386_PGALLOC_H
2#define _I386_PGALLOC_H
3
4#include <asm/fixmap.h>
5#include <linux/threads.h>
6#include <linux/mm.h> /* for struct page */
7
8#ifdef CONFIG_PARAVIRT
9#include <asm/paravirt.h>
10#else
11#define paravirt_alloc_pt(pfn) do { } while (0)
12#define paravirt_alloc_pd(pfn) do { } while (0)
13#define paravirt_alloc_pd(pfn) do { } while (0)
14#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
15#define paravirt_release_pt(pfn) do { } while (0)
16#define paravirt_release_pd(pfn) do { } while (0)
17#endif
18
19#define pmd_populate_kernel(mm, pmd, pte) \
20do { \
21 paravirt_alloc_pt(__pa(pte) >> PAGE_SHIFT); \
22 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
23} while (0)
24
25#define pmd_populate(mm, pmd, pte) \
26do { \
27 paravirt_alloc_pt(page_to_pfn(pte)); \
28 set_pmd(pmd, __pmd(_PAGE_TABLE + \
29 ((unsigned long long)page_to_pfn(pte) << \
30 (unsigned long long) PAGE_SHIFT))); \
31} while (0)
32
33/*
34 * Allocate and free page tables.
35 */
36extern pgd_t *pgd_alloc(struct mm_struct *);
37extern void pgd_free(pgd_t *pgd);
38
39extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
40extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
41
42static inline void pte_free_kernel(pte_t *pte)
43{
44 free_page((unsigned long)pte);
45}
46
47static inline void pte_free(struct page *pte)
48{
49 __free_page(pte);
50}
51
52
53#define __pte_free_tlb(tlb,pte) \
54do { \
55 paravirt_release_pt(page_to_pfn(pte)); \
56 tlb_remove_page((tlb),(pte)); \
57} while (0)
58
59#ifdef CONFIG_X86_PAE
60/*
61 * In the PAE case we free the pmds as part of the pgd.
62 */
63#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
64#define pmd_free(x) do { } while (0)
65#define __pmd_free_tlb(tlb,x) do { } while (0)
66#define pud_populate(mm, pmd, pte) BUG()
67#endif
68
69#define check_pgt_cache() do { } while (0)
70
71#endif /* _I386_PGALLOC_H */