1 #ifndef _ASM_X86_PGTABLE_DEFS_H
2 #define _ASM_X86_PGTABLE_DEFS_H
4 #include <linux/const.h>
5 #include <asm/page_types.h>
7 #define FIRST_USER_ADDRESS 0
9 #define _PAGE_BIT_PRESENT 0 /* is present */
10 #define _PAGE_BIT_RW 1 /* writeable */
11 #define _PAGE_BIT_USER 2 /* userspace addressable */
12 #define _PAGE_BIT_PWT 3 /* page write through */
13 #define _PAGE_BIT_PCD 4 /* page cache disabled */
14 #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
15 #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
16 #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
17 #define _PAGE_BIT_PAT 7 /* on 4KB pages */
18 #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
19 #define _PAGE_BIT_UNUSED1 9 /* available for programmer */
20 #define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
21 #define _PAGE_BIT_HIDDEN 11 /* hidden by kmemcheck */
22 #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
23 #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
24 #define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
25 #define _PAGE_BIT_SPLITTING _PAGE_BIT_UNUSED1 /* only valid on a PSE pmd */
26 #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
28 /* If _PAGE_BIT_PRESENT is clear, we use these: */
29 /* - if the user mapped it with PROT_NONE; pte_present gives true */
30 #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
31 /* - set: nonlinear file mapping, saved PTE; unset:swap */
32 #define _PAGE_BIT_FILE _PAGE_BIT_DIRTY
34 #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
35 #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
36 #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
37 #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
38 #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
39 #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
40 #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
41 #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
42 #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
43 #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
44 #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
45 #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
46 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
47 #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
48 #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
49 #define _PAGE_SPLITTING (_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING)
50 #define __HAVE_ARCH_PTE_SPECIAL
52 #ifdef CONFIG_KMEMCHECK
53 #define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
55 #define _PAGE_HIDDEN (_AT(pteval_t, 0))
58 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
59 #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
61 #define _PAGE_NX (_AT(pteval_t, 0))
64 #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
65 #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
68 #if defined(CONFIG_X86_64) && CONFIG_XEN_COMPAT <= 0x030002
69 extern unsigned int __kernel_page_user;
71 #define __kernel_page_user 0
75 #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
76 _PAGE_ACCESSED | _PAGE_DIRTY)
77 #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
78 _PAGE_DIRTY | __kernel_page_user)
80 /* Set of bits not changed in pte_modify */
81 #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_CACHE_MASK | _PAGE_IOMAP | \
82 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
83 #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
86 * PAT settings are part of the hypervisor interface, which sets the
87 * MSR to 0x050100070406 (i.e. WB, WT, UC-, UC, WC, WP [, UC, UC]).
89 #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT | _PAGE_PAT)
90 #define _PAGE_CACHE_WB (0)
91 #define _PAGE_CACHE_WT (_PAGE_PWT)
92 #define _PAGE_CACHE_WC (_PAGE_PAT)
93 #define _PAGE_CACHE_WP (_PAGE_PAT | _PAGE_PWT)
94 #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
95 #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT)
97 #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
98 #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
99 _PAGE_ACCESSED | _PAGE_NX)
101 #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
102 _PAGE_USER | _PAGE_ACCESSED)
103 #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
104 _PAGE_ACCESSED | _PAGE_NX)
105 #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
107 #define PAGE_COPY PAGE_COPY_NOEXEC
108 #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
109 _PAGE_ACCESSED | _PAGE_NX)
110 #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
113 #define __PAGE_KERNEL_EXEC \
114 (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | __kernel_page_user)
115 #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
117 #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
118 #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
119 #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
120 #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
121 #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
122 #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
123 #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
124 #define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO | _PAGE_USER)
125 #define __PAGE_KERNEL_VVAR_NOCACHE (__PAGE_KERNEL_VVAR | _PAGE_PCD | _PAGE_PWT)
126 #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
127 #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
128 #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
130 #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
131 #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
132 #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
133 #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
135 #define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
136 #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
137 #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
138 #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
139 #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
140 #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
141 #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
142 #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
143 #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
144 #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
145 #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
146 #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
147 #define PAGE_KERNEL_VVAR __pgprot(__PAGE_KERNEL_VVAR)
148 #define PAGE_KERNEL_VVAR_NOCACHE __pgprot(__PAGE_KERNEL_VVAR_NOCACHE)
150 #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
151 #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
152 #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
153 #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
156 #define __P000 PAGE_NONE
157 #define __P001 PAGE_READONLY
158 #define __P010 PAGE_COPY
159 #define __P011 PAGE_COPY
160 #define __P100 PAGE_READONLY_EXEC
161 #define __P101 PAGE_READONLY_EXEC
162 #define __P110 PAGE_COPY_EXEC
163 #define __P111 PAGE_COPY_EXEC
165 #define __S000 PAGE_NONE
166 #define __S001 PAGE_READONLY
167 #define __S010 PAGE_SHARED
168 #define __S011 PAGE_SHARED
169 #define __S100 PAGE_READONLY_EXEC
170 #define __S101 PAGE_READONLY_EXEC
171 #define __S110 PAGE_SHARED_EXEC
172 #define __S111 PAGE_SHARED_EXEC
175 * early identity mapping pte attrib macros.
178 #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
181 * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
182 * bits are combined, this will alow user to access the high address mapped
183 * VDSO in the presence of CONFIG_COMPAT_VDSO
185 #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
186 #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */
187 #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
191 # include <asm/pgtable_32_types.h>
193 # include "pgtable_64_types.h"
198 #include <linux/types.h>
200 /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
201 #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
203 /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
204 #define PTE_FLAGS_MASK (~PTE_PFN_MASK)
206 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
208 #include <asm/maddr.h>
210 typedef struct { pgdval_t pgd; } pgd_t;
212 #define __pgd_ma(x) ((pgd_t) { (x) } )
213 static inline pgd_t xen_make_pgd(pgdval_t val)
215 if (likely(val & _PAGE_PRESENT))
216 val = pte_phys_to_machine(val);
217 return (pgd_t) { val };
220 #define __pgd_val(x) ((x).pgd)
221 static inline pgdval_t xen_pgd_val(pgd_t pgd)
223 pgdval_t ret = __pgd_val(pgd);
224 #if PAGETABLE_LEVELS == 2 && CONFIG_XEN_COMPAT <= 0x030002
226 ret = machine_to_phys(ret) | _PAGE_PRESENT;
228 if (likely(ret & _PAGE_PRESENT))
229 ret = pte_machine_to_phys(ret);
234 static inline pgdval_t pgd_flags(pgd_t pgd)
236 return __pgd_val(pgd) & PTE_FLAGS_MASK;
239 #if PAGETABLE_LEVELS > 3
240 typedef struct { pudval_t pud; } pud_t;
242 #define __pud_ma(x) ((pud_t) { (x) } )
243 static inline pud_t xen_make_pud(pudval_t val)
245 if (likely(val & _PAGE_PRESENT))
246 val = pte_phys_to_machine(val);
247 return (pud_t) { val };
250 #define __pud_val(x) ((x).pud)
251 static inline pudval_t xen_pud_val(pud_t pud)
253 pudval_t ret = __pud_val(pud);
254 if (likely(ret & _PAGE_PRESENT))
255 ret = pte_machine_to_phys(ret);
259 #include <asm-generic/pgtable-nopud.h>
261 #define __pud_val(x) __pgd_val((x).pgd)
262 static inline pudval_t xen_pud_val(pud_t pud)
264 return xen_pgd_val(pud.pgd);
268 #if PAGETABLE_LEVELS > 2
269 typedef struct { pmdval_t pmd; } pmd_t;
271 #define __pmd_ma(x) ((pmd_t) { (x) } )
272 static inline pmd_t xen_make_pmd(pmdval_t val)
274 if (likely(val & _PAGE_PRESENT))
275 val = pte_phys_to_machine(val);
276 return (pmd_t) { val };
279 #define __pmd_val(x) ((x).pmd)
280 static inline pmdval_t xen_pmd_val(pmd_t pmd)
282 pmdval_t ret = __pmd_val(pmd);
283 #if CONFIG_XEN_COMPAT <= 0x030002
285 ret = pte_machine_to_phys(ret) | _PAGE_PRESENT;
287 if (likely(ret & _PAGE_PRESENT))
288 ret = pte_machine_to_phys(ret);
293 #include <asm-generic/pgtable-nopmd.h>
295 #define __pmd_ma(x) ((pmd_t) { .pud.pgd = __pgd_ma(x) } )
296 #define __pmd_val(x) __pgd_val((x).pud.pgd)
297 static inline pmdval_t xen_pmd_val(pmd_t pmd)
299 return xen_pgd_val(pmd.pud.pgd);
303 static inline pudval_t pud_flags(pud_t pud)
305 return __pud_val(pud) & PTE_FLAGS_MASK;
308 static inline pmdval_t pmd_flags(pmd_t pmd)
310 return __pmd_val(pmd) & PTE_FLAGS_MASK;
313 #define __pte_ma(x) ((pte_t) { .pte = (x) } )
314 static inline pte_t xen_make_pte(pteval_t val)
316 if (likely((val & (_PAGE_PRESENT|_PAGE_IOMAP)) == _PAGE_PRESENT))
317 val = pte_phys_to_machine(val);
318 return (pte_t) { .pte = val };
321 #define __pte_val(x) ((x).pte)
322 static inline pteval_t xen_pte_val(pte_t pte)
324 pteval_t ret = __pte_val(pte);
325 if (likely((pte.pte_low & (_PAGE_PRESENT|_PAGE_IOMAP)) == _PAGE_PRESENT))
326 ret = pte_machine_to_phys(ret);
330 static inline pteval_t pte_flags(pte_t pte)
332 return __pte_val(pte) & PTE_FLAGS_MASK;
335 #define pgprot_val(x) ((x).pgprot)
336 #define __pgprot(x) ((pgprot_t) { (x) } )
339 typedef struct page *pgtable_t;
341 extern pteval_t __supported_pte_mask;
342 extern void set_nx(void);
343 extern int nx_enabled;
345 #define pgprot_writecombine pgprot_writecombine
346 extern pgprot_t pgprot_writecombine(pgprot_t prot);
349 /* Indicate that x86 has its own track and untrack pfn vma functions */
350 #define __HAVE_PFNMAP_TRACKING
353 #define __HAVE_PHYS_MEM_ACCESS_PROT
355 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
356 unsigned long size, pgprot_t vma_prot);
357 int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
358 unsigned long size, pgprot_t *vma_prot);
360 /* Install a pte for a particular vaddr in kernel space. */
361 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
363 extern void xen_pagetable_reserve(u64 start, u64 end);
366 extern void arch_report_meminfo(struct seq_file *m);
376 #ifdef CONFIG_PROC_FS
377 extern void update_page_count(int level, unsigned long pages);
379 static inline void update_page_count(int level, unsigned long pages) { }
383 * Helper function that returns the kernel pagetable entry controlling
384 * the virtual address 'address'. NULL means no pagetable entry present.
385 * NOTE: the return type is pte_t but if the pmd is PSE then we return it
388 extern pte_t *lookup_address(unsigned long address, unsigned int *level);
390 #endif /* !__ASSEMBLY__ */
392 #endif /* _ASM_X86_PGTABLE_DEFS_H */