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)
43 #define _PAGE_GLOBAL (_AT(pteval_t, 0))
45 #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
47 #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
48 #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
49 #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
50 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
51 #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
52 #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
53 #define _PAGE_SPLITTING (_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING)
54 #define __HAVE_ARCH_PTE_SPECIAL
56 #ifdef CONFIG_KMEMCHECK
57 #define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
59 #define _PAGE_HIDDEN (_AT(pteval_t, 0))
62 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
63 #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
65 #define _PAGE_NX (_AT(pteval_t, 0))
68 #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
69 #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
71 #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
72 _PAGE_ACCESSED | _PAGE_DIRTY)
73 #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
76 /* Set of bits not changed in pte_modify */
77 #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
78 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
79 #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
81 /* The ASID is the lower 12 bits of CR3 */
82 #define X86_CR3_PCID_ASID_MASK (_AC((1<<12)-1,UL))
84 /* Mask for all the PCID-related bits in CR3: */
85 #define X86_CR3_PCID_MASK (X86_CR3_PCID_NOFLUSH | X86_CR3_PCID_ASID_MASK)
86 #define X86_CR3_PCID_ASID_KERN (_AC(0x0,UL))
88 #if defined(CONFIG_KAISER) && defined(CONFIG_X86_64)
89 /* Let X86_CR3_PCID_ASID_USER be usable for the X86_CR3_PCID_NOFLUSH bit */
90 #define X86_CR3_PCID_ASID_USER (_AC(0x80,UL))
92 #define X86_CR3_PCID_KERN_FLUSH (X86_CR3_PCID_ASID_KERN)
93 #define X86_CR3_PCID_USER_FLUSH (X86_CR3_PCID_ASID_USER)
94 #define X86_CR3_PCID_KERN_NOFLUSH (X86_CR3_PCID_NOFLUSH | X86_CR3_PCID_ASID_KERN)
95 #define X86_CR3_PCID_USER_NOFLUSH (X86_CR3_PCID_NOFLUSH | X86_CR3_PCID_ASID_USER)
97 #define X86_CR3_PCID_ASID_USER (_AC(0x0,UL))
99 * PCIDs are unsupported on 32-bit and none of these bits can be
102 #define X86_CR3_PCID_KERN_FLUSH (0)
103 #define X86_CR3_PCID_USER_FLUSH (0)
104 #define X86_CR3_PCID_KERN_NOFLUSH (0)
105 #define X86_CR3_PCID_USER_NOFLUSH (0)
108 #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT)
109 #define _PAGE_CACHE_WB (0)
110 #define _PAGE_CACHE_WC (_PAGE_PWT)
111 #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
112 #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT)
114 #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
115 #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
116 _PAGE_ACCESSED | _PAGE_NX)
118 #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
119 _PAGE_USER | _PAGE_ACCESSED)
120 #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
121 _PAGE_ACCESSED | _PAGE_NX)
122 #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
124 #define PAGE_COPY PAGE_COPY_NOEXEC
125 #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
126 _PAGE_ACCESSED | _PAGE_NX)
127 #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
130 #define __PAGE_KERNEL_EXEC \
131 (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
132 #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
134 #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
135 #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
136 #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
137 #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
138 #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
139 #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
140 #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
141 #define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO | _PAGE_USER)
142 #define __PAGE_KERNEL_VVAR_NOCACHE (__PAGE_KERNEL_VVAR | _PAGE_PCD | _PAGE_PWT)
143 #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
144 #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
145 #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
147 #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
148 #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
149 #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
150 #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
152 #define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
153 #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
154 #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
155 #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
156 #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
157 #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
158 #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
159 #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
160 #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
161 #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
162 #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
163 #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
164 #define PAGE_KERNEL_VVAR __pgprot(__PAGE_KERNEL_VVAR)
165 #define PAGE_KERNEL_VVAR_NOCACHE __pgprot(__PAGE_KERNEL_VVAR_NOCACHE)
167 #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
168 #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
169 #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
170 #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
173 #define __P000 PAGE_NONE
174 #define __P001 PAGE_READONLY
175 #define __P010 PAGE_COPY
176 #define __P011 PAGE_COPY
177 #define __P100 PAGE_READONLY_EXEC
178 #define __P101 PAGE_READONLY_EXEC
179 #define __P110 PAGE_COPY_EXEC
180 #define __P111 PAGE_COPY_EXEC
182 #define __S000 PAGE_NONE
183 #define __S001 PAGE_READONLY
184 #define __S010 PAGE_SHARED
185 #define __S011 PAGE_SHARED
186 #define __S100 PAGE_READONLY_EXEC
187 #define __S101 PAGE_READONLY_EXEC
188 #define __S110 PAGE_SHARED_EXEC
189 #define __S111 PAGE_SHARED_EXEC
192 * early identity mapping pte attrib macros.
195 #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
198 * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
199 * bits are combined, this will alow user to access the high address mapped
200 * VDSO in the presence of CONFIG_COMPAT_VDSO
202 #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
203 #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */
204 #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
208 # include "pgtable_32_types.h"
210 # include "pgtable_64_types.h"
215 #include <linux/types.h>
217 /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
218 #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
220 /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
221 #define PTE_FLAGS_MASK (~PTE_PFN_MASK)
223 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
225 typedef struct { pgdval_t pgd; } pgd_t;
227 static inline pgd_t native_make_pgd(pgdval_t val)
229 return (pgd_t) { val };
232 static inline pgdval_t native_pgd_val(pgd_t pgd)
237 static inline pgdval_t pgd_flags(pgd_t pgd)
239 return native_pgd_val(pgd) & PTE_FLAGS_MASK;
242 #if PAGETABLE_LEVELS > 3
243 typedef struct { pudval_t pud; } pud_t;
245 static inline pud_t native_make_pud(pmdval_t val)
247 return (pud_t) { val };
250 static inline pudval_t native_pud_val(pud_t pud)
255 #include <asm-generic/pgtable-nopud.h>
257 static inline pudval_t native_pud_val(pud_t pud)
259 return native_pgd_val(pud.pgd);
263 #if PAGETABLE_LEVELS > 2
264 typedef struct { pmdval_t pmd; } pmd_t;
266 static inline pmd_t native_make_pmd(pmdval_t val)
268 return (pmd_t) { val };
271 static inline pmdval_t native_pmd_val(pmd_t pmd)
276 #include <asm-generic/pgtable-nopmd.h>
278 static inline pmdval_t native_pmd_val(pmd_t pmd)
280 return native_pgd_val(pmd.pud.pgd);
284 static inline pudval_t pud_flags(pud_t pud)
286 return native_pud_val(pud) & PTE_FLAGS_MASK;
289 static inline pmdval_t pmd_flags(pmd_t pmd)
291 return native_pmd_val(pmd) & PTE_FLAGS_MASK;
294 static inline pte_t native_make_pte(pteval_t val)
296 return (pte_t) { .pte = val };
299 static inline pteval_t native_pte_val(pte_t pte)
304 static inline pteval_t pte_flags(pte_t pte)
306 return native_pte_val(pte) & PTE_FLAGS_MASK;
309 #define pgprot_val(x) ((x).pgprot)
310 #define __pgprot(x) ((pgprot_t) { (x) } )
313 typedef struct page *pgtable_t;
315 extern pteval_t __supported_pte_mask;
316 extern void set_nx(void);
317 extern int nx_enabled;
319 #define pgprot_writecombine pgprot_writecombine
320 extern pgprot_t pgprot_writecombine(pgprot_t prot);
322 /* Indicate that x86 has its own track and untrack pfn vma functions */
323 #define __HAVE_PFNMAP_TRACKING
325 #define __HAVE_PHYS_MEM_ACCESS_PROT
327 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
328 unsigned long size, pgprot_t vma_prot);
329 int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
330 unsigned long size, pgprot_t *vma_prot);
332 /* Install a pte for a particular vaddr in kernel space. */
333 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
335 extern void native_pagetable_reserve(u64 start, u64 end);
337 extern void native_pagetable_setup_start(pgd_t *base);
338 extern void native_pagetable_setup_done(pgd_t *base);
340 #define native_pagetable_setup_start x86_init_pgd_noop
341 #define native_pagetable_setup_done x86_init_pgd_noop
345 extern void arch_report_meminfo(struct seq_file *m);
355 #ifdef CONFIG_PROC_FS
356 extern void update_page_count(int level, unsigned long pages);
358 static inline void update_page_count(int level, unsigned long pages) { }
362 * Helper function that returns the kernel pagetable entry controlling
363 * the virtual address 'address'. NULL means no pagetable entry present.
364 * NOTE: the return type is pte_t but if the pmd is PSE then we return it
367 extern pte_t *lookup_address(unsigned long address, unsigned int *level);
369 #endif /* !__ASSEMBLY__ */
371 #endif /* _ASM_X86_PGTABLE_DEFS_H */