1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
#ifndef _I386_PGALLOC_H
#define _I386_PGALLOC_H
#include <linux/config.h>
#include <asm/fixmap.h>
#include <linux/threads.h>
#include <linux/mm.h> /* for struct page */
#include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
#define pmd_populate_kernel(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
#define pmd_populate(mm, pmd, pte) \
do { \
if (unlikely((mm)->context.pinned)) { \
if (!PageHighMem(pte)) \
BUG_ON(HYPERVISOR_update_va_mapping( \
(unsigned long)__va(page_to_pfn(pte)<<PAGE_SHIFT),\
pfn_pte(page_to_pfn(pte), PAGE_KERNEL_RO), 0));\
set_pmd(pmd, __pmd(_PAGE_TABLE + \
((unsigned long long)page_to_pfn(pte) << \
(unsigned long long) PAGE_SHIFT))); \
} else { \
*(pmd) = __pmd(_PAGE_TABLE + \
((unsigned long long)page_to_pfn(pte) << \
(unsigned long long) PAGE_SHIFT)); \
} \
} while (0)
/*
* Allocate and free page tables.
*/
extern pgd_t *pgd_alloc(struct mm_struct *);
extern void pgd_free(pgd_t *pgd);
extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
static inline void pte_free_kernel(pte_t *pte)
{
free_page((unsigned long)pte);
make_page_writable(pte);
}
extern void pte_free(struct page *pte);
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#ifdef CONFIG_X86_PAE
/*
* In the PAE case we free the pmds as part of the pgd.
*/
#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
#define pmd_free(x) do { } while (0)
#define __pmd_free_tlb(tlb,x) do { } while (0)
#define pud_populate(mm, pmd, pte) BUG()
#endif
#define check_pgt_cache() do { } while (0)
#endif /* _I386_PGALLOC_H */
|
