diff options
Diffstat (limited to 'arch/x86/mm/init_64.c')
-rw-r--r-- | arch/x86/mm/init_64.c | 74 |
1 files changed, 1 insertions, 73 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 89d97477c1d9..bce2e5d9edd4 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c | |||
@@ -58,79 +58,7 @@ | |||
58 | 58 | ||
59 | #include "mm_internal.h" | 59 | #include "mm_internal.h" |
60 | 60 | ||
61 | static void ident_pmd_init(unsigned long pmd_flag, pmd_t *pmd_page, | 61 | #include "ident_map.c" |
62 | unsigned long addr, unsigned long end) | ||
63 | { | ||
64 | addr &= PMD_MASK; | ||
65 | for (; addr < end; addr += PMD_SIZE) { | ||
66 | pmd_t *pmd = pmd_page + pmd_index(addr); | ||
67 | |||
68 | if (!pmd_present(*pmd)) | ||
69 | set_pmd(pmd, __pmd(addr | pmd_flag)); | ||
70 | } | ||
71 | } | ||
72 | static int ident_pud_init(struct x86_mapping_info *info, pud_t *pud_page, | ||
73 | unsigned long addr, unsigned long end) | ||
74 | { | ||
75 | unsigned long next; | ||
76 | |||
77 | for (; addr < end; addr = next) { | ||
78 | pud_t *pud = pud_page + pud_index(addr); | ||
79 | pmd_t *pmd; | ||
80 | |||
81 | next = (addr & PUD_MASK) + PUD_SIZE; | ||
82 | if (next > end) | ||
83 | next = end; | ||
84 | |||
85 | if (pud_present(*pud)) { | ||
86 | pmd = pmd_offset(pud, 0); | ||
87 | ident_pmd_init(info->pmd_flag, pmd, addr, next); | ||
88 | continue; | ||
89 | } | ||
90 | pmd = (pmd_t *)info->alloc_pgt_page(info->context); | ||
91 | if (!pmd) | ||
92 | return -ENOMEM; | ||
93 | ident_pmd_init(info->pmd_flag, pmd, addr, next); | ||
94 | set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE)); | ||
95 | } | ||
96 | |||
97 | return 0; | ||
98 | } | ||
99 | |||
100 | int kernel_ident_mapping_init(struct x86_mapping_info *info, pgd_t *pgd_page, | ||
101 | unsigned long addr, unsigned long end) | ||
102 | { | ||
103 | unsigned long next; | ||
104 | int result; | ||
105 | int off = info->kernel_mapping ? pgd_index(__PAGE_OFFSET) : 0; | ||
106 | |||
107 | for (; addr < end; addr = next) { | ||
108 | pgd_t *pgd = pgd_page + pgd_index(addr) + off; | ||
109 | pud_t *pud; | ||
110 | |||
111 | next = (addr & PGDIR_MASK) + PGDIR_SIZE; | ||
112 | if (next > end) | ||
113 | next = end; | ||
114 | |||
115 | if (pgd_present(*pgd)) { | ||
116 | pud = pud_offset(pgd, 0); | ||
117 | result = ident_pud_init(info, pud, addr, next); | ||
118 | if (result) | ||
119 | return result; | ||
120 | continue; | ||
121 | } | ||
122 | |||
123 | pud = (pud_t *)info->alloc_pgt_page(info->context); | ||
124 | if (!pud) | ||
125 | return -ENOMEM; | ||
126 | result = ident_pud_init(info, pud, addr, next); | ||
127 | if (result) | ||
128 | return result; | ||
129 | set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE)); | ||
130 | } | ||
131 | |||
132 | return 0; | ||
133 | } | ||
134 | 62 | ||
135 | /* | 63 | /* |
136 | * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the | 64 | * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the |