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
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
#ifndef _X86_64_PGALLOC_H
#define _X86_64_PGALLOC_H
#include <asm/processor.h>
#include <asm/fixmap.h>
#include <asm/pda.h>
#include <linux/threads.h>
#include <linux/mm.h>
#define pmd_populate_kernel(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
#define pgd_populate(mm, pgd, pmd) \
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pmd)))
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
}
extern __inline__ pmd_t *get_pmd(void)
{
return (pmd_t *)get_zeroed_page(GFP_KERNEL);
}
extern __inline__ void pmd_free(pmd_t *pmd)
{
if ((unsigned long)pmd & (PAGE_SIZE-1))
BUG();
free_page((unsigned long)pmd);
}
static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
{
return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
}
static inline pgd_t *pgd_alloc (struct mm_struct *mm)
{
return (pgd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
}
static inline void pgd_free (pgd_t *pgd)
{
if ((unsigned long)pgd & (PAGE_SIZE-1))
BUG();
free_page((unsigned long)pgd);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
if (!p)
return NULL;
return virt_to_page(p);
}
/* Should really implement gc for free page table pages. This could be
done with a reference count in struct page. */
extern __inline__ void pte_free_kernel(pte_t *pte)
{
if ((unsigned long)pte & (PAGE_SIZE-1))
BUG();
free_page((unsigned long)pte);
}
extern inline void pte_free(struct page *pte)
{
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pmd_free_tlb(tlb,x) pmd_free(x)
#endif /* _X86_64_PGALLOC_H */
|
