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18#ifndef _ASM_TILE_PGTABLE_H
19#define _ASM_TILE_PGTABLE_H
20
21#include <hv/hypervisor.h>
22
23#ifndef __ASSEMBLY__
24
25#include <linux/bitops.h>
26#include <linux/threads.h>
27#include <linux/slab.h>
28#include <linux/list.h>
29#include <linux/spinlock.h>
30#include <asm/processor.h>
31#include <asm/fixmap.h>
32#include <asm/system.h>
33
34struct mm_struct;
35struct vm_area_struct;
36
37
38
39
40
41extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
42#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
43
44extern pgd_t swapper_pg_dir[];
45extern pgprot_t swapper_pgprot;
46extern struct kmem_cache *pgd_cache;
47extern spinlock_t pgd_lock;
48extern struct list_head pgd_list;
49
50
51
52
53
54
55
56
57
58#define PGD_LIST_OFFSET \
59 ((PTRS_PER_PGD * sizeof(pgd_t)) - sizeof(struct list_head))
60#define pgd_to_list(pgd) \
61 ((struct list_head *)((char *)(pgd) + PGD_LIST_OFFSET))
62#define list_to_pgd(list) \
63 ((pgd_t *)((char *)(list) - PGD_LIST_OFFSET))
64
65extern void pgtable_cache_init(void);
66extern void paging_init(void);
67extern void set_page_homes(void);
68
69#define FIRST_USER_ADDRESS 0
70
71#define _PAGE_PRESENT HV_PTE_PRESENT
72#define _PAGE_HUGE_PAGE HV_PTE_PAGE
73#define _PAGE_READABLE HV_PTE_READABLE
74#define _PAGE_WRITABLE HV_PTE_WRITABLE
75#define _PAGE_EXECUTABLE HV_PTE_EXECUTABLE
76#define _PAGE_ACCESSED HV_PTE_ACCESSED
77#define _PAGE_DIRTY HV_PTE_DIRTY
78#define _PAGE_GLOBAL HV_PTE_GLOBAL
79#define _PAGE_USER HV_PTE_USER
80
81
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83
84
85
86#define _PAGE_ALL (\
87 _PAGE_PRESENT | \
88 _PAGE_HUGE_PAGE | \
89 _PAGE_READABLE | \
90 _PAGE_WRITABLE | \
91 _PAGE_EXECUTABLE | \
92 _PAGE_ACCESSED | \
93 _PAGE_DIRTY | \
94 _PAGE_GLOBAL | \
95 _PAGE_USER \
96)
97
98#define PAGE_NONE \
99 __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED)
100#define PAGE_SHARED \
101 __pgprot(_PAGE_PRESENT | _PAGE_READABLE | _PAGE_WRITABLE | \
102 _PAGE_USER | _PAGE_ACCESSED)
103
104#define PAGE_SHARED_EXEC \
105 __pgprot(_PAGE_PRESENT | _PAGE_READABLE | _PAGE_WRITABLE | \
106 _PAGE_EXECUTABLE | _PAGE_USER | _PAGE_ACCESSED)
107#define PAGE_COPY_NOEXEC \
108 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_READABLE)
109#define PAGE_COPY_EXEC \
110 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | \
111 _PAGE_READABLE | _PAGE_EXECUTABLE)
112#define PAGE_COPY \
113 PAGE_COPY_NOEXEC
114#define PAGE_READONLY \
115 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_READABLE)
116#define PAGE_READONLY_EXEC \
117 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | \
118 _PAGE_READABLE | _PAGE_EXECUTABLE)
119
120#define _PAGE_KERNEL_RO \
121 (_PAGE_PRESENT | _PAGE_GLOBAL | _PAGE_READABLE | _PAGE_ACCESSED)
122#define _PAGE_KERNEL \
123 (_PAGE_KERNEL_RO | _PAGE_WRITABLE | _PAGE_DIRTY)
124#define _PAGE_KERNEL_EXEC (_PAGE_KERNEL_RO | _PAGE_EXECUTABLE)
125
126#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
127#define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL_RO)
128#define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL_EXEC)
129
130#define page_to_kpgprot(p) PAGE_KERNEL
131
132
133
134
135
136#define __P000 PAGE_NONE
137#define __P001 PAGE_READONLY
138#define __P010 PAGE_COPY
139#define __P011 PAGE_COPY
140#define __P100 PAGE_READONLY_EXEC
141#define __P101 PAGE_READONLY_EXEC
142#define __P110 PAGE_COPY_EXEC
143#define __P111 PAGE_COPY_EXEC
144
145#define __S000 PAGE_NONE
146#define __S001 PAGE_READONLY
147#define __S010 PAGE_SHARED
148#define __S011 PAGE_SHARED
149#define __S100 PAGE_READONLY_EXEC
150#define __S101 PAGE_READONLY_EXEC
151#define __S110 PAGE_SHARED_EXEC
152#define __S111 PAGE_SHARED_EXEC
153
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157
158
159#define _PAGE_TABLE _PAGE_PRESENT
160
161
162#define pgprot_modify(oldprot, newprot) \
163 (pgprot_t) { ((oldprot).val & ~_PAGE_ALL) | (newprot).val }
164
165
166#define pte_pgprot(x) hv_pte_set_pfn((x), 0)
167
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171
172
173static inline void __pte_clear(pte_t *ptep)
174{
175#ifdef __tilegx__
176 ptep->val = 0;
177#else
178 u32 *tmp = (u32 *)ptep;
179 tmp[0] = 0;
180 barrier();
181 tmp[1] = 0;
182#endif
183}
184#define pte_clear(mm, addr, ptep) __pte_clear(ptep)
185
186
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188
189
190#define pte_present hv_pte_get_present
191#define pte_user hv_pte_get_user
192#define pte_read hv_pte_get_readable
193#define pte_dirty hv_pte_get_dirty
194#define pte_young hv_pte_get_accessed
195#define pte_write hv_pte_get_writable
196#define pte_exec hv_pte_get_executable
197#define pte_huge hv_pte_get_page
198#define pte_rdprotect hv_pte_clear_readable
199#define pte_exprotect hv_pte_clear_executable
200#define pte_mkclean hv_pte_clear_dirty
201#define pte_mkold hv_pte_clear_accessed
202#define pte_wrprotect hv_pte_clear_writable
203#define pte_mksmall hv_pte_clear_page
204#define pte_mkread hv_pte_set_readable
205#define pte_mkexec hv_pte_set_executable
206#define pte_mkdirty hv_pte_set_dirty
207#define pte_mkyoung hv_pte_set_accessed
208#define pte_mkwrite hv_pte_set_writable
209#define pte_mkhuge hv_pte_set_page
210
211#define pte_special(pte) 0
212#define pte_mkspecial(pte) (pte)
213
214
215
216
217#define pte_set_forcecache hv_pte_set_client0
218#define pte_get_forcecache hv_pte_get_client0
219#define pte_clear_forcecache hv_pte_clear_client0
220#define pte_set_anyhome hv_pte_set_client1
221#define pte_get_anyhome hv_pte_get_client1
222#define pte_clear_anyhome hv_pte_clear_client1
223
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225
226
227#define pte_migrating hv_pte_get_migrating
228#define pte_mkmigrate(x) hv_pte_set_migrating(hv_pte_clear_present(x))
229#define pte_donemigrate(x) hv_pte_set_present(hv_pte_clear_migrating(x))
230
231#define pte_ERROR(e) \
232 pr_err("%s:%d: bad pte 0x%016llx.\n", __FILE__, __LINE__, pte_val(e))
233#define pgd_ERROR(e) \
234 pr_err("%s:%d: bad pgd 0x%016llx.\n", __FILE__, __LINE__, pgd_val(e))
235
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240
241
242extern void set_pte_order(pte_t *ptep, pte_t pte, int order);
243
244#define set_pte(ptep, pteval) set_pte_order(ptep, pteval, 0)
245#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
246#define set_pte_atomic(pteptr, pteval) set_pte(pteptr, pteval)
247
248#define pte_page(x) pfn_to_page(pte_pfn(x))
249
250static inline int pte_none(pte_t pte)
251{
252 return !pte.val;
253}
254
255static inline unsigned long pte_pfn(pte_t pte)
256{
257 return hv_pte_get_pfn(pte);
258}
259
260
261extern pgprot_t set_remote_cache_cpu(pgprot_t prot, int cpu);
262extern int get_remote_cache_cpu(pgprot_t prot);
263
264static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
265{
266 return hv_pte_set_pfn(prot, pfn);
267}
268
269
270extern void start_mm_caching(struct mm_struct *mm);
271extern void check_mm_caching(struct mm_struct *prev, struct mm_struct *next);
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276
277
278#define _PAGE_FILE HV_PTE_CLIENT1
279#define PTE_FILE_MAX_BITS 32
280#define pte_file(pte) (hv_pte_get_client1(pte) && !hv_pte_get_client0(pte))
281#define pte_to_pgoff(pte) ((pte).val >> 32)
282#define pgoff_to_pte(off) ((pte_t) { (((long long)(off)) << 32) | _PAGE_FILE })
283
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288
289#define __swp_type(swp) ((swp).val & 0x1f)
290#define __swp_offset(swp) ((swp).val >> 5)
291#define __swp_entry(type, off) ((swp_entry_t) { (type) | ((off) << 5) })
292#define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).val >> 32 })
293#define __swp_entry_to_pte(swp) ((pte_t) { (((long long) ((swp).val)) << 32) })
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304
305static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
306{
307 memcpy(dst, src, count * sizeof(pgd_t));
308}
309
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313
314
315#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
316
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320
321static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
322{
323 return pfn_pte(hv_pte_get_pfn(pte), newprot);
324}
325
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330
331
332#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
333
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337
338#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
339
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343
344#define pgd_offset_k(address) pgd_offset(&init_mm, address)
345
346#if defined(CONFIG_HIGHPTE)
347extern pte_t *pte_offset_map(pmd_t *, unsigned long address);
348#define pte_unmap(pte) kunmap_atomic(pte)
349#else
350#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
351#define pte_unmap(pte) do { } while (0)
352#endif
353
354
355#define kpte_clear_flush(ptep, vaddr) \
356do { \
357 pte_clear(&init_mm, (vaddr), (ptep)); \
358 local_flush_tlb_page(FLUSH_NONEXEC, (vaddr), PAGE_SIZE); \
359} while (0)
360
361
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363
364
365#define update_mmu_cache(vma, address, pte) do { } while (0)
366
367#ifdef CONFIG_FLATMEM
368#define kern_addr_valid(addr) (1)
369#endif
370
371#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
372 remap_pfn_range(vma, vaddr, pfn, size, prot)
373
374extern void vmalloc_sync_all(void);
375
376#endif
377
378#ifdef __tilegx__
379#include <asm/pgtable_64.h>
380#else
381#include <asm/pgtable_32.h>
382#endif
383
384#ifndef __ASSEMBLY__
385
386static inline int pmd_none(pmd_t pmd)
387{
388
389
390
391
392 return (unsigned long)pmd_val(pmd) == 0;
393}
394
395static inline int pmd_present(pmd_t pmd)
396{
397 return pmd_val(pmd) & _PAGE_PRESENT;
398}
399
400static inline int pmd_bad(pmd_t pmd)
401{
402 return ((pmd_val(pmd) & _PAGE_ALL) != _PAGE_TABLE);
403}
404
405static inline unsigned long pages_to_mb(unsigned long npg)
406{
407 return npg >> (20 - PAGE_SHIFT);
408}
409
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414
415
416static inline unsigned long pmd_index(unsigned long address)
417{
418 return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
419}
420
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425
426
427static inline unsigned long pmd_page_vaddr(pmd_t pmd)
428{
429 phys_addr_t pa =
430 (phys_addr_t)pmd_ptfn(pmd) << HV_LOG2_PAGE_TABLE_ALIGN;
431 return (unsigned long)__va(pa);
432}
433
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439
440
441#define pmd_page(pmd) pfn_to_page(HV_PTFN_TO_PFN(pmd_ptfn(pmd)))
442
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448
449static inline unsigned long pte_index(unsigned long address)
450{
451 return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
452}
453
454static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
455{
456 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
457}
458
459static inline int pmd_huge_page(pmd_t pmd)
460{
461 return pmd_val(pmd) & _PAGE_HUGE_PAGE;
462}
463
464#include <asm-generic/pgtable.h>
465
466
467struct seq_file;
468int arch_proc_pgtable_show(struct seq_file *m, struct mm_struct *mm,
469 unsigned long vaddr, pte_t *ptep, void **datap);
470
471#endif
472
473#endif
474