1
2
3
4
5
6
7
8
9#ifndef _ASM_PGTABLE_64_H
10#define _ASM_PGTABLE_64_H
11
12#include <linux/compiler.h>
13#include <linux/linkage.h>
14
15#include <asm/addrspace.h>
16#include <asm/page.h>
17#include <asm/cachectl.h>
18#include <asm/fixmap.h>
19
20#if CONFIG_PGTABLE_LEVELS == 2
21#include <asm-generic/pgtable-nopmd.h>
22#elif CONFIG_PGTABLE_LEVELS == 3
23#include <asm-generic/pgtable-nopud.h>
24#else
25#include <asm-generic/pgtable-nop4d.h>
26#endif
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44#ifdef __PAGETABLE_PMD_FOLDED
45#define PGDIR_SHIFT (PAGE_SHIFT + PAGE_SHIFT + PTE_ORDER - 3)
46#else
47
48
49#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 3))
50#define PMD_SIZE (1UL << PMD_SHIFT)
51#define PMD_MASK (~(PMD_SIZE-1))
52
53# ifdef __PAGETABLE_PUD_FOLDED
54# define PGDIR_SHIFT (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3))
55# endif
56#endif
57
58#ifndef __PAGETABLE_PUD_FOLDED
59#define PUD_SHIFT (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3))
60#define PUD_SIZE (1UL << PUD_SHIFT)
61#define PUD_MASK (~(PUD_SIZE-1))
62#define PGDIR_SHIFT (PUD_SHIFT + (PAGE_SHIFT + PUD_ORDER - 3))
63#endif
64
65#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
66#define PGDIR_MASK (~(PGDIR_SIZE-1))
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86#ifdef CONFIG_PAGE_SIZE_4KB
87# ifdef CONFIG_MIPS_VA_BITS_48
88# define PGD_ORDER 0
89# define PUD_ORDER 0
90# else
91# define PGD_ORDER 1
92# define PUD_ORDER aieeee_attempt_to_allocate_pud
93# endif
94#define PMD_ORDER 0
95#define PTE_ORDER 0
96#endif
97#ifdef CONFIG_PAGE_SIZE_8KB
98#define PGD_ORDER 0
99#define PUD_ORDER aieeee_attempt_to_allocate_pud
100#define PMD_ORDER 0
101#define PTE_ORDER 0
102#endif
103#ifdef CONFIG_PAGE_SIZE_16KB
104#ifdef CONFIG_MIPS_VA_BITS_48
105#define PGD_ORDER 1
106#else
107#define PGD_ORDER 0
108#endif
109#define PUD_ORDER aieeee_attempt_to_allocate_pud
110#define PMD_ORDER 0
111#define PTE_ORDER 0
112#endif
113#ifdef CONFIG_PAGE_SIZE_32KB
114#define PGD_ORDER 0
115#define PUD_ORDER aieeee_attempt_to_allocate_pud
116#define PMD_ORDER 0
117#define PTE_ORDER 0
118#endif
119#ifdef CONFIG_PAGE_SIZE_64KB
120#define PGD_ORDER 0
121#define PUD_ORDER aieeee_attempt_to_allocate_pud
122#ifdef CONFIG_MIPS_VA_BITS_48
123#define PMD_ORDER 0
124#else
125#define PMD_ORDER aieeee_attempt_to_allocate_pmd
126#endif
127#define PTE_ORDER 0
128#endif
129
130#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))
131#ifndef __PAGETABLE_PUD_FOLDED
132#define PTRS_PER_PUD ((PAGE_SIZE << PUD_ORDER) / sizeof(pud_t))
133#endif
134#ifndef __PAGETABLE_PMD_FOLDED
135#define PTRS_PER_PMD ((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t))
136#endif
137#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
138
139#define USER_PTRS_PER_PGD ((TASK_SIZE64 / PGDIR_SIZE)?(TASK_SIZE64 / PGDIR_SIZE):1)
140
141
142
143
144
145
146#define VMALLOC_START (MAP_BASE + (2 * PAGE_SIZE))
147#define VMALLOC_END \
148 (MAP_BASE + \
149 min(PTRS_PER_PGD * PTRS_PER_PUD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \
150 (1UL << cpu_vmbits)) - (1UL << 32))
151
152#if defined(CONFIG_MODULES) && defined(KBUILD_64BIT_SYM32) && \
153 VMALLOC_START != CKSSEG
154
155#define MODULE_START CKSSEG
156#define MODULE_END (FIXADDR_START-2*PAGE_SIZE)
157#endif
158
159#define pte_ERROR(e) \
160 printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
161#ifndef __PAGETABLE_PMD_FOLDED
162#define pmd_ERROR(e) \
163 printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
164#endif
165#ifndef __PAGETABLE_PUD_FOLDED
166#define pud_ERROR(e) \
167 printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
168#endif
169#define pgd_ERROR(e) \
170 printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
171
172extern pte_t invalid_pte_table[PTRS_PER_PTE];
173
174#ifndef __PAGETABLE_PUD_FOLDED
175
176
177
178
179
180typedef struct { unsigned long pud; } pud_t;
181#define pud_val(x) ((x).pud)
182#define __pud(x) ((pud_t) { (x) })
183
184extern pud_t invalid_pud_table[PTRS_PER_PUD];
185
186
187
188
189static inline int p4d_none(p4d_t p4d)
190{
191 return p4d_val(p4d) == (unsigned long)invalid_pud_table;
192}
193
194static inline int p4d_bad(p4d_t p4d)
195{
196 if (unlikely(p4d_val(p4d) & ~PAGE_MASK))
197 return 1;
198
199 return 0;
200}
201
202static inline int p4d_present(p4d_t p4d)
203{
204 return p4d_val(p4d) != (unsigned long)invalid_pud_table;
205}
206
207static inline void p4d_clear(p4d_t *p4dp)
208{
209 p4d_val(*p4dp) = (unsigned long)invalid_pud_table;
210}
211
212static inline pud_t *p4d_pgtable(p4d_t p4d)
213{
214 return (pud_t *)p4d_val(p4d);
215}
216
217#define p4d_phys(p4d) virt_to_phys((void *)p4d_val(p4d))
218#define p4d_page(p4d) (pfn_to_page(p4d_phys(p4d) >> PAGE_SHIFT))
219
220#define p4d_index(address) (((address) >> P4D_SHIFT) & (PTRS_PER_P4D - 1))
221
222static inline void set_p4d(p4d_t *p4d, p4d_t p4dval)
223{
224 *p4d = p4dval;
225}
226
227#endif
228
229#ifndef __PAGETABLE_PMD_FOLDED
230
231
232
233
234typedef struct { unsigned long pmd; } pmd_t;
235#define pmd_val(x) ((x).pmd)
236#define __pmd(x) ((pmd_t) { (x) } )
237
238
239extern pmd_t invalid_pmd_table[PTRS_PER_PMD];
240#endif
241
242
243
244
245static inline int pmd_none(pmd_t pmd)
246{
247 return pmd_val(pmd) == (unsigned long) invalid_pte_table;
248}
249
250static inline int pmd_bad(pmd_t pmd)
251{
252#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
253
254 if (unlikely(pmd_val(pmd) & _PAGE_HUGE))
255 return 0;
256#endif
257
258 if (unlikely(pmd_val(pmd) & ~PAGE_MASK))
259 return 1;
260
261 return 0;
262}
263
264static inline int pmd_present(pmd_t pmd)
265{
266#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
267 if (unlikely(pmd_val(pmd) & _PAGE_HUGE))
268 return pmd_val(pmd) & _PAGE_PRESENT;
269#endif
270
271 return pmd_val(pmd) != (unsigned long) invalid_pte_table;
272}
273
274static inline void pmd_clear(pmd_t *pmdp)
275{
276 pmd_val(*pmdp) = ((unsigned long) invalid_pte_table);
277}
278#ifndef __PAGETABLE_PMD_FOLDED
279
280
281
282
283static inline int pud_none(pud_t pud)
284{
285 return pud_val(pud) == (unsigned long) invalid_pmd_table;
286}
287
288static inline int pud_bad(pud_t pud)
289{
290 return pud_val(pud) & ~PAGE_MASK;
291}
292
293static inline int pud_present(pud_t pud)
294{
295 return pud_val(pud) != (unsigned long) invalid_pmd_table;
296}
297
298static inline void pud_clear(pud_t *pudp)
299{
300 pud_val(*pudp) = ((unsigned long) invalid_pmd_table);
301}
302#endif
303
304#define pte_page(x) pfn_to_page(pte_pfn(x))
305
306#ifdef CONFIG_CPU_VR41XX
307#define pte_pfn(x) ((unsigned long)((x).pte >> (PAGE_SHIFT + 2)))
308#define pfn_pte(pfn, prot) __pte(((pfn) << (PAGE_SHIFT + 2)) | pgprot_val(prot))
309#else
310#define pte_pfn(x) ((unsigned long)((x).pte >> _PFN_SHIFT))
311#define pfn_pte(pfn, prot) __pte(((pfn) << _PFN_SHIFT) | pgprot_val(prot))
312#define pfn_pmd(pfn, prot) __pmd(((pfn) << _PFN_SHIFT) | pgprot_val(prot))
313#endif
314
315#ifndef __PAGETABLE_PMD_FOLDED
316static inline pmd_t *pud_pgtable(pud_t pud)
317{
318 return (pmd_t *)pud_val(pud);
319}
320#define pud_phys(pud) virt_to_phys((void *)pud_val(pud))
321#define pud_page(pud) (pfn_to_page(pud_phys(pud) >> PAGE_SHIFT))
322
323#endif
324
325
326
327
328extern void pgd_init(unsigned long page);
329extern void pud_init(unsigned long page, unsigned long pagetable);
330extern void pmd_init(unsigned long page, unsigned long pagetable);
331
332
333
334
335
336static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
337{ pte_t pte; pte_val(pte) = (type << 16) | (offset << 24); return pte; }
338
339#define __swp_type(x) (((x).val >> 16) & 0xff)
340#define __swp_offset(x) ((x).val >> 24)
341#define __swp_entry(type, offset) ((swp_entry_t) { pte_val(mk_swap_pte((type), (offset))) })
342#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
343#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
344
345#endif
346