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5cd16ee9 ME |
1 | #ifndef _ASM_POWERPC_PAGE_64_H |
2 | #define _ASM_POWERPC_PAGE_64_H | |
88ced031 | 3 | #ifdef __KERNEL__ |
5cd16ee9 ME |
4 | |
5 | /* | |
6 | * Copyright (C) 2001 PPC64 Team, IBM Corp | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | /* | |
15 | * We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux | |
16 | * specific, every notion of page number shared with the firmware, TCEs, | |
17 | * iommu, etc... still uses a page size of 4K. | |
18 | */ | |
19 | #define HW_PAGE_SHIFT 12 | |
20 | #define HW_PAGE_SIZE (ASM_CONST(1) << HW_PAGE_SHIFT) | |
21 | #define HW_PAGE_MASK (~(HW_PAGE_SIZE-1)) | |
22 | ||
23 | /* | |
24 | * PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and | |
25 | * HW_PAGE_SHIFT, that is 4K pages. | |
26 | */ | |
27 | #define PAGE_FACTOR (PAGE_SHIFT - HW_PAGE_SHIFT) | |
28 | ||
5cd16ee9 ME |
29 | /* Segment size */ |
30 | #define SID_SHIFT 28 | |
31 | #define SID_MASK 0xfffffffffUL | |
32 | #define ESID_MASK 0xfffffffff0000000UL | |
33 | #define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK) | |
34 | ||
35 | #ifndef __ASSEMBLY__ | |
36 | #include <asm/cache.h> | |
37 | ||
38 | typedef unsigned long pte_basic_t; | |
39 | ||
40 | static __inline__ void clear_page(void *addr) | |
41 | { | |
42 | unsigned long lines, line_size; | |
43 | ||
44 | line_size = ppc64_caches.dline_size; | |
45 | lines = ppc64_caches.dlines_per_page; | |
46 | ||
47 | __asm__ __volatile__( | |
48 | "mtctr %1 # clear_page\n\ | |
49 | 1: dcbz 0,%0\n\ | |
50 | add %0,%0,%3\n\ | |
51 | bdnz+ 1b" | |
52 | : "=r" (addr) | |
53 | : "r" (lines), "0" (addr), "r" (line_size) | |
54 | : "ctr", "memory"); | |
55 | } | |
56 | ||
57 | extern void copy_4K_page(void *to, void *from); | |
58 | ||
59 | #ifdef CONFIG_PPC_64K_PAGES | |
60 | static inline void copy_page(void *to, void *from) | |
61 | { | |
62 | unsigned int i; | |
63 | for (i=0; i < (1 << (PAGE_SHIFT - 12)); i++) { | |
64 | copy_4K_page(to, from); | |
65 | to += 4096; | |
66 | from += 4096; | |
67 | } | |
68 | } | |
69 | #else /* CONFIG_PPC_64K_PAGES */ | |
70 | static inline void copy_page(void *to, void *from) | |
71 | { | |
72 | copy_4K_page(to, from); | |
73 | } | |
74 | #endif /* CONFIG_PPC_64K_PAGES */ | |
75 | ||
76 | /* Log 2 of page table size */ | |
77 | extern u64 ppc64_pft_size; | |
78 | ||
79 | /* Large pages size */ | |
b50ce232 | 80 | #ifdef CONFIG_HUGETLB_PAGE |
5cd16ee9 | 81 | extern unsigned int HPAGE_SHIFT; |
b50ce232 AW |
82 | #else |
83 | #define HPAGE_SHIFT PAGE_SHIFT | |
84 | #endif | |
5cd16ee9 ME |
85 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) |
86 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
87 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
88 | ||
89 | #endif /* __ASSEMBLY__ */ | |
90 | ||
91 | #ifdef CONFIG_HUGETLB_PAGE | |
92 | ||
93 | #define HTLB_AREA_SHIFT 40 | |
94 | #define HTLB_AREA_SIZE (1UL << HTLB_AREA_SHIFT) | |
95 | #define GET_HTLB_AREA(x) ((x) >> HTLB_AREA_SHIFT) | |
96 | ||
9a94c579 DG |
97 | #define LOW_ESID_MASK(addr, len) \ |
98 | (((1U << (GET_ESID(min((addr)+(len)-1, 0x100000000UL))+1)) \ | |
99 | - (1U << GET_ESID(min((addr), 0x100000000UL)))) & 0xffff) | |
5cd16ee9 ME |
100 | #define HTLB_AREA_MASK(addr, len) (((1U << (GET_HTLB_AREA(addr+len-1)+1)) \ |
101 | - (1U << GET_HTLB_AREA(addr))) & 0xffff) | |
102 | ||
103 | #define ARCH_HAS_HUGEPAGE_ONLY_RANGE | |
f10a04c0 | 104 | #define ARCH_HAS_HUGETLB_FREE_PGD_RANGE |
5cd16ee9 ME |
105 | #define ARCH_HAS_PREPARE_HUGEPAGE_RANGE |
106 | #define ARCH_HAS_SETCLEAR_HUGE_PTE | |
107 | ||
108 | #define touches_hugepage_low_range(mm, addr, len) \ | |
9a94c579 DG |
109 | (((addr) < 0x100000000UL) \ |
110 | && (LOW_ESID_MASK((addr), (len)) & (mm)->context.low_htlb_areas)) | |
5cd16ee9 | 111 | #define touches_hugepage_high_range(mm, addr, len) \ |
9a94c579 DG |
112 | ((((addr) + (len)) > 0x100000000UL) \ |
113 | && (HTLB_AREA_MASK((addr), (len)) & (mm)->context.high_htlb_areas)) | |
5cd16ee9 ME |
114 | |
115 | #define __within_hugepage_low_range(addr, len, segmask) \ | |
9a94c579 DG |
116 | ( (((addr)+(len)) <= 0x100000000UL) \ |
117 | && ((LOW_ESID_MASK((addr), (len)) | (segmask)) == (segmask))) | |
5cd16ee9 ME |
118 | #define within_hugepage_low_range(addr, len) \ |
119 | __within_hugepage_low_range((addr), (len), \ | |
120 | current->mm->context.low_htlb_areas) | |
121 | #define __within_hugepage_high_range(addr, len, zonemask) \ | |
9a94c579 DG |
122 | ( ((addr) >= 0x100000000UL) \ |
123 | && ((HTLB_AREA_MASK((addr), (len)) | (zonemask)) == (zonemask))) | |
5cd16ee9 ME |
124 | #define within_hugepage_high_range(addr, len) \ |
125 | __within_hugepage_high_range((addr), (len), \ | |
126 | current->mm->context.high_htlb_areas) | |
127 | ||
128 | #define is_hugepage_only_range(mm, addr, len) \ | |
129 | (touches_hugepage_high_range((mm), (addr), (len)) || \ | |
130 | touches_hugepage_low_range((mm), (addr), (len))) | |
131 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
132 | ||
133 | #define in_hugepage_area(context, addr) \ | |
134 | (cpu_has_feature(CPU_FTR_16M_PAGE) && \ | |
5e391dc9 DG |
135 | ( ( (addr) >= 0x100000000UL) \ |
136 | ? ((1 << GET_HTLB_AREA(addr)) & (context).high_htlb_areas) \ | |
137 | : ((1 << GET_ESID(addr)) & (context).low_htlb_areas) ) ) | |
5cd16ee9 ME |
138 | |
139 | #else /* !CONFIG_HUGETLB_PAGE */ | |
140 | ||
141 | #define in_hugepage_area(mm, addr) 0 | |
142 | ||
143 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
144 | ||
145 | #ifdef MODULE | |
146 | #define __page_aligned __attribute__((__aligned__(PAGE_SIZE))) | |
147 | #else | |
148 | #define __page_aligned \ | |
149 | __attribute__((__aligned__(PAGE_SIZE), \ | |
150 | __section__(".data.page_aligned"))) | |
151 | #endif | |
152 | ||
153 | #define VM_DATA_DEFAULT_FLAGS \ | |
154 | (test_thread_flag(TIF_32BIT) ? \ | |
155 | VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64) | |
156 | ||
157 | /* | |
158 | * This is the default if a program doesn't have a PT_GNU_STACK | |
159 | * program header entry. The PPC64 ELF ABI has a non executable stack | |
160 | * stack by default, so in the absense of a PT_GNU_STACK program header | |
161 | * we turn execute permission off. | |
162 | */ | |
163 | #define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \ | |
164 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
165 | ||
166 | #define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \ | |
167 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
168 | ||
169 | #define VM_STACK_DEFAULT_FLAGS \ | |
170 | (test_thread_flag(TIF_32BIT) ? \ | |
171 | VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64) | |
172 | ||
173 | #include <asm-generic/page.h> | |
174 | ||
88ced031 | 175 | #endif /* __KERNEL__ */ |
5cd16ee9 | 176 | #endif /* _ASM_POWERPC_PAGE_64_H */ |