diff options
Diffstat (limited to 'include/asm-parisc/pgalloc.h')
-rw-r--r-- | include/asm-parisc/pgalloc.h | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/include/asm-parisc/pgalloc.h b/include/asm-parisc/pgalloc.h deleted file mode 100644 index fc987a1c12a8..000000000000 --- a/include/asm-parisc/pgalloc.h +++ /dev/null | |||
@@ -1,149 +0,0 @@ | |||
1 | #ifndef _ASM_PGALLOC_H | ||
2 | #define _ASM_PGALLOC_H | ||
3 | |||
4 | #include <linux/gfp.h> | ||
5 | #include <linux/mm.h> | ||
6 | #include <linux/threads.h> | ||
7 | #include <asm/processor.h> | ||
8 | #include <asm/fixmap.h> | ||
9 | |||
10 | #include <asm/cache.h> | ||
11 | |||
12 | /* Allocate the top level pgd (page directory) | ||
13 | * | ||
14 | * Here (for 64 bit kernels) we implement a Hybrid L2/L3 scheme: we | ||
15 | * allocate the first pmd adjacent to the pgd. This means that we can | ||
16 | * subtract a constant offset to get to it. The pmd and pgd sizes are | ||
17 | * arranged so that a single pmd covers 4GB (giving a full 64-bit | ||
18 | * process access to 8TB) so our lookups are effectively L2 for the | ||
19 | * first 4GB of the kernel (i.e. for all ILP32 processes and all the | ||
20 | * kernel for machines with under 4GB of memory) */ | ||
21 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | ||
22 | { | ||
23 | pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL, | ||
24 | PGD_ALLOC_ORDER); | ||
25 | pgd_t *actual_pgd = pgd; | ||
26 | |||
27 | if (likely(pgd != NULL)) { | ||
28 | memset(pgd, 0, PAGE_SIZE<<PGD_ALLOC_ORDER); | ||
29 | #ifdef CONFIG_64BIT | ||
30 | actual_pgd += PTRS_PER_PGD; | ||
31 | /* Populate first pmd with allocated memory. We mark it | ||
32 | * with PxD_FLAG_ATTACHED as a signal to the system that this | ||
33 | * pmd entry may not be cleared. */ | ||
34 | __pgd_val_set(*actual_pgd, (PxD_FLAG_PRESENT | | ||
35 | PxD_FLAG_VALID | | ||
36 | PxD_FLAG_ATTACHED) | ||
37 | + (__u32)(__pa((unsigned long)pgd) >> PxD_VALUE_SHIFT)); | ||
38 | /* The first pmd entry also is marked with _PAGE_GATEWAY as | ||
39 | * a signal that this pmd may not be freed */ | ||
40 | __pgd_val_set(*pgd, PxD_FLAG_ATTACHED); | ||
41 | #endif | ||
42 | } | ||
43 | return actual_pgd; | ||
44 | } | ||
45 | |||
46 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) | ||
47 | { | ||
48 | #ifdef CONFIG_64BIT | ||
49 | pgd -= PTRS_PER_PGD; | ||
50 | #endif | ||
51 | free_pages((unsigned long)pgd, PGD_ALLOC_ORDER); | ||
52 | } | ||
53 | |||
54 | #if PT_NLEVELS == 3 | ||
55 | |||
56 | /* Three Level Page Table Support for pmd's */ | ||
57 | |||
58 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) | ||
59 | { | ||
60 | __pgd_val_set(*pgd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID) + | ||
61 | (__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT)); | ||
62 | } | ||
63 | |||
64 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) | ||
65 | { | ||
66 | pmd_t *pmd = (pmd_t *)__get_free_pages(GFP_KERNEL|__GFP_REPEAT, | ||
67 | PMD_ORDER); | ||
68 | if (pmd) | ||
69 | memset(pmd, 0, PAGE_SIZE<<PMD_ORDER); | ||
70 | return pmd; | ||
71 | } | ||
72 | |||
73 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) | ||
74 | { | ||
75 | #ifdef CONFIG_64BIT | ||
76 | if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED) | ||
77 | /* This is the permanent pmd attached to the pgd; | ||
78 | * cannot free it */ | ||
79 | return; | ||
80 | #endif | ||
81 | free_pages((unsigned long)pmd, PMD_ORDER); | ||
82 | } | ||
83 | |||
84 | #else | ||
85 | |||
86 | /* Two Level Page Table Support for pmd's */ | ||
87 | |||
88 | /* | ||
89 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | ||
90 | * inside the pgd, so has no extra memory associated with it. | ||
91 | */ | ||
92 | |||
93 | #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) | ||
94 | #define pmd_free(mm, x) do { } while (0) | ||
95 | #define pgd_populate(mm, pmd, pte) BUG() | ||
96 | |||
97 | #endif | ||
98 | |||
99 | static inline void | ||
100 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) | ||
101 | { | ||
102 | #ifdef CONFIG_64BIT | ||
103 | /* preserve the gateway marker if this is the beginning of | ||
104 | * the permanent pmd */ | ||
105 | if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED) | ||
106 | __pmd_val_set(*pmd, (PxD_FLAG_PRESENT | | ||
107 | PxD_FLAG_VALID | | ||
108 | PxD_FLAG_ATTACHED) | ||
109 | + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)); | ||
110 | else | ||
111 | #endif | ||
112 | __pmd_val_set(*pmd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID) | ||
113 | + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)); | ||
114 | } | ||
115 | |||
116 | #define pmd_populate(mm, pmd, pte_page) \ | ||
117 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) | ||
118 | #define pmd_pgtable(pmd) pmd_page(pmd) | ||
119 | |||
120 | static inline pgtable_t | ||
121 | pte_alloc_one(struct mm_struct *mm, unsigned long address) | ||
122 | { | ||
123 | struct page *page = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO); | ||
124 | if (page) | ||
125 | pgtable_page_ctor(page); | ||
126 | return page; | ||
127 | } | ||
128 | |||
129 | static inline pte_t * | ||
130 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) | ||
131 | { | ||
132 | pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO); | ||
133 | return pte; | ||
134 | } | ||
135 | |||
136 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | ||
137 | { | ||
138 | free_page((unsigned long)pte); | ||
139 | } | ||
140 | |||
141 | static inline void pte_free(struct mm_struct *mm, struct page *pte) | ||
142 | { | ||
143 | pgtable_page_dtor(pte); | ||
144 | pte_free_kernel(mm, page_address(pte)); | ||
145 | } | ||
146 | |||
147 | #define check_pgt_cache() do { } while (0) | ||
148 | |||
149 | #endif | ||