Commit | Line | Data |
---|---|---|
71087002 BH |
1 | /* Included from asm/pgtable-*.h only ! */ |
2 | ||
3 | /* | |
4 | * Some bits are only used on some cpu families... Make sure that all | |
5 | * the undefined gets a sensible default | |
6 | */ | |
7 | #ifndef _PAGE_HASHPTE | |
8 | #define _PAGE_HASHPTE 0 | |
9 | #endif | |
10 | #ifndef _PAGE_SHARED | |
11 | #define _PAGE_SHARED 0 | |
12 | #endif | |
13 | #ifndef _PAGE_HWWRITE | |
14 | #define _PAGE_HWWRITE 0 | |
15 | #endif | |
71087002 BH |
16 | #ifndef _PAGE_EXEC |
17 | #define _PAGE_EXEC 0 | |
18 | #endif | |
19 | #ifndef _PAGE_ENDIAN | |
20 | #define _PAGE_ENDIAN 0 | |
21 | #endif | |
22 | #ifndef _PAGE_COHERENT | |
23 | #define _PAGE_COHERENT 0 | |
24 | #endif | |
25 | #ifndef _PAGE_WRITETHRU | |
26 | #define _PAGE_WRITETHRU 0 | |
27 | #endif | |
71087002 BH |
28 | #ifndef _PAGE_4K_PFN |
29 | #define _PAGE_4K_PFN 0 | |
30 | #endif | |
57e2a99f BH |
31 | #ifndef _PAGE_SAO |
32 | #define _PAGE_SAO 0 | |
33 | #endif | |
71087002 BH |
34 | #ifndef _PAGE_PSIZE |
35 | #define _PAGE_PSIZE 0 | |
36 | #endif | |
a7b9f671 LC |
37 | /* _PAGE_RO and _PAGE_RW shall not be defined at the same time */ |
38 | #ifndef _PAGE_RO | |
39 | #define _PAGE_RO 0 | |
40 | #else | |
41 | #define _PAGE_RW 0 | |
42 | #endif | |
6a119eae AK |
43 | |
44 | #ifndef _PAGE_PTE | |
45 | #define _PAGE_PTE 0 | |
46 | #endif | |
47 | ||
71087002 BH |
48 | #ifndef _PMD_PRESENT_MASK |
49 | #define _PMD_PRESENT_MASK _PMD_PRESENT | |
50 | #endif | |
51 | #ifndef _PMD_SIZE | |
52 | #define _PMD_SIZE 0 | |
53 | #define PMD_PAGE_SIZE(pmd) bad_call_to_PMD_PAGE_SIZE() | |
54 | #endif | |
55 | #ifndef _PAGE_KERNEL_RO | |
a7b9f671 | 56 | #define _PAGE_KERNEL_RO (_PAGE_RO) |
ea3cc330 BH |
57 | #endif |
58 | #ifndef _PAGE_KERNEL_ROX | |
a7b9f671 | 59 | #define _PAGE_KERNEL_ROX (_PAGE_EXEC | _PAGE_RO) |
71087002 BH |
60 | #endif |
61 | #ifndef _PAGE_KERNEL_RW | |
ea3cc330 BH |
62 | #define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE) |
63 | #endif | |
64 | #ifndef _PAGE_KERNEL_RWX | |
65 | #define _PAGE_KERNEL_RWX (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE | _PAGE_EXEC) | |
71087002 BH |
66 | #endif |
67 | #ifndef _PAGE_HPTEFLAGS | |
68 | #define _PAGE_HPTEFLAGS _PAGE_HASHPTE | |
69 | #endif | |
70 | #ifndef _PTE_NONE_MASK | |
71 | #define _PTE_NONE_MASK _PAGE_HPTEFLAGS | |
72 | #endif | |
73 | ||
74 | /* Make sure we get a link error if PMD_PAGE_SIZE is ever called on a | |
75 | * kernel without large page PMD support | |
76 | */ | |
77 | #ifndef __ASSEMBLY__ | |
78 | extern unsigned long bad_call_to_PMD_PAGE_SIZE(void); | |
79 | #endif /* __ASSEMBLY__ */ | |
80 | ||
81 | /* Location of the PFN in the PTE. Most 32-bit platforms use the same | |
82 | * as _PAGE_SHIFT here (ie, naturally aligned). | |
83 | * Platform who don't just pre-define the value so we don't override it here | |
84 | */ | |
85 | #ifndef PTE_RPN_SHIFT | |
86 | #define PTE_RPN_SHIFT (PAGE_SHIFT) | |
87 | #endif | |
88 | ||
89 | /* The mask convered by the RPN must be a ULL on 32-bit platforms with | |
90 | * 64-bit PTEs | |
91 | */ | |
92 | #if defined(CONFIG_PPC32) && defined(CONFIG_PTE_64BIT) | |
71087002 BH |
93 | #define PTE_RPN_MASK (~((1ULL<<PTE_RPN_SHIFT)-1)) |
94 | #else | |
71087002 BH |
95 | #define PTE_RPN_MASK (~((1UL<<PTE_RPN_SHIFT)-1)) |
96 | #endif | |
97 | ||
25985edc | 98 | /* _PAGE_CHG_MASK masks of bits that are to be preserved across |
71087002 BH |
99 | * pgprot changes |
100 | */ | |
101 | #define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ | |
102 | _PAGE_ACCESSED | _PAGE_SPECIAL) | |
103 | ||
104 | /* Mask of bits returned by pte_pgprot() */ | |
105 | #define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \ | |
106 | _PAGE_WRITETHRU | _PAGE_ENDIAN | _PAGE_4K_PFN | \ | |
a7b9f671 | 107 | _PAGE_USER | _PAGE_ACCESSED | _PAGE_RO | \ |
ea3cc330 | 108 | _PAGE_RW | _PAGE_HWWRITE | _PAGE_DIRTY | _PAGE_EXEC) |
71087002 BH |
109 | |
110 | /* | |
111 | * We define 2 sets of base prot bits, one for basic pages (ie, | |
112 | * cacheable kernel and user pages) and one for non cacheable | |
113 | * pages. We always set _PAGE_COHERENT when SMP is enabled or | |
114 | * the processor might need it for DMA coherency. | |
115 | */ | |
116 | #define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE) | |
c6023202 SW |
117 | #if defined(CONFIG_SMP) || defined(CONFIG_PPC_STD_MMU) || \ |
118 | defined(CONFIG_PPC_E500MC) | |
71087002 BH |
119 | #define _PAGE_BASE (_PAGE_BASE_NC | _PAGE_COHERENT) |
120 | #else | |
121 | #define _PAGE_BASE (_PAGE_BASE_NC) | |
122 | #endif | |
123 | ||
124 | /* Permission masks used to generate the __P and __S table, | |
125 | * | |
126 | * Note:__pgprot is defined in arch/powerpc/include/asm/page.h | |
127 | * | |
128 | * Write permissions imply read permissions for now (we could make write-only | |
129 | * pages on BookE but we don't bother for now). Execute permission control is | |
130 | * possible on platforms that define _PAGE_EXEC | |
131 | * | |
132 | * Note due to the way vm flags are laid out, the bits are XWR | |
133 | */ | |
134 | #define PAGE_NONE __pgprot(_PAGE_BASE) | |
135 | #define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW) | |
a7b9f671 LC |
136 | #define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | \ |
137 | _PAGE_EXEC) | |
138 | #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO) | |
139 | #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO | \ | |
140 | _PAGE_EXEC) | |
141 | #define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO) | |
142 | #define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO | \ | |
143 | _PAGE_EXEC) | |
71087002 BH |
144 | |
145 | #define __P000 PAGE_NONE | |
146 | #define __P001 PAGE_READONLY | |
147 | #define __P010 PAGE_COPY | |
148 | #define __P011 PAGE_COPY | |
149 | #define __P100 PAGE_READONLY_X | |
150 | #define __P101 PAGE_READONLY_X | |
151 | #define __P110 PAGE_COPY_X | |
152 | #define __P111 PAGE_COPY_X | |
153 | ||
154 | #define __S000 PAGE_NONE | |
155 | #define __S001 PAGE_READONLY | |
156 | #define __S010 PAGE_SHARED | |
157 | #define __S011 PAGE_SHARED | |
158 | #define __S100 PAGE_READONLY_X | |
159 | #define __S101 PAGE_READONLY_X | |
160 | #define __S110 PAGE_SHARED_X | |
161 | #define __S111 PAGE_SHARED_X | |
162 | ||
163 | /* Permission masks used for kernel mappings */ | |
164 | #define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW) | |
165 | #define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ | |
166 | _PAGE_NO_CACHE) | |
167 | #define PAGE_KERNEL_NCG __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ | |
168 | _PAGE_NO_CACHE | _PAGE_GUARDED) | |
ea3cc330 | 169 | #define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX) |
71087002 | 170 | #define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO) |
ea3cc330 | 171 | #define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_ROX) |
71087002 BH |
172 | |
173 | /* Protection used for kernel text. We want the debuggers to be able to | |
174 | * set breakpoints anywhere, so don't write protect the kernel text | |
175 | * on platforms where such control is possible. | |
176 | */ | |
177 | #if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) ||\ | |
09597cfe | 178 | defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE) |
71087002 BH |
179 | #define PAGE_KERNEL_TEXT PAGE_KERNEL_X |
180 | #else | |
181 | #define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX | |
182 | #endif | |
183 | ||
184 | /* Make modules code happy. We don't set RO yet */ | |
185 | #define PAGE_KERNEL_EXEC PAGE_KERNEL_X | |
186 | ||
92437d41 PG |
187 | /* |
188 | * Don't just check for any non zero bits in __PAGE_USER, since for book3e | |
189 | * and PTE_64BIT, PAGE_KERNEL_X contains _PAGE_BAP_SR which is also in | |
25985edc | 190 | * _PAGE_USER. Need to explicitly match _PAGE_BAP_UR bit in that case too. |
92437d41 PG |
191 | */ |
192 | #define pte_user(val) ((val & _PAGE_USER) == _PAGE_USER) | |
193 | ||
71087002 BH |
194 | /* Advertise special mapping type for AGP */ |
195 | #define PAGE_AGP (PAGE_KERNEL_NC) | |
196 | #define HAVE_PAGE_AGP | |
197 | ||
198 | /* Advertise support for _PAGE_SPECIAL */ | |
71087002 | 199 | #define __HAVE_ARCH_PTE_SPECIAL |
71087002 | 200 |