1#ifndef _PARISC_PGTABLE_H
2#define _PARISC_PGTABLE_H
3
4#include <asm-generic/4level-fixup.h>
5
6#include <asm/fixmap.h>
7
8#ifndef __ASSEMBLY__
9
10
11
12
13#include <linux/bitops.h>
14#include <linux/spinlock.h>
15#include <linux/mm_types.h>
16#include <asm/processor.h>
17#include <asm/cache.h>
18
19extern spinlock_t pa_tlb_lock;
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34#define kern_addr_valid(addr) (1)
35
36
37
38
39
40
41static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
42{
43 mtsp(mm->context, 1);
44 pdtlb(addr);
45 if (unlikely(split_tlb))
46 pitlb(addr);
47}
48
49
50
51
52
53#define set_pte(pteptr, pteval) \
54 do{ \
55 *(pteptr) = (pteval); \
56 } while(0)
57
58#define pte_inserted(x) \
59 ((pte_val(x) & (_PAGE_PRESENT|_PAGE_ACCESSED)) \
60 == (_PAGE_PRESENT|_PAGE_ACCESSED))
61
62#define set_pte_at(mm, addr, ptep, pteval) \
63 do { \
64 pte_t old_pte; \
65 unsigned long flags; \
66 spin_lock_irqsave(&pa_tlb_lock, flags); \
67 old_pte = *ptep; \
68 set_pte(ptep, pteval); \
69 if (pte_inserted(old_pte)) \
70 purge_tlb_entries(mm, addr); \
71 spin_unlock_irqrestore(&pa_tlb_lock, flags); \
72 } while (0)
73
74#endif
75
76#include <asm/page.h>
77
78#define pte_ERROR(e) \
79 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
80#define pmd_ERROR(e) \
81 printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, (unsigned long)pmd_val(e))
82#define pgd_ERROR(e) \
83 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e))
84
85
86#define KERNEL_INITIAL_ORDER 24
87#define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER)
88
89#if CONFIG_PGTABLE_LEVELS == 3
90#define PGD_ORDER 1
91#define PMD_ORDER 1
92#define PGD_ALLOC_ORDER 2
93#else
94#define PGD_ORDER 1
95#define PGD_ALLOC_ORDER PGD_ORDER
96#endif
97
98
99
100
101#define PLD_SHIFT PAGE_SHIFT
102#define PLD_SIZE PAGE_SIZE
103#define BITS_PER_PTE (PAGE_SHIFT - BITS_PER_PTE_ENTRY)
104#define PTRS_PER_PTE (1UL << BITS_PER_PTE)
105
106
107#define pgtable_cache_init() do { } while (0)
108
109#define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE)
110#define PMD_SIZE (1UL << PMD_SHIFT)
111#define PMD_MASK (~(PMD_SIZE-1))
112#if CONFIG_PGTABLE_LEVELS == 3
113#define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY)
114#else
115#define __PAGETABLE_PMD_FOLDED
116#define BITS_PER_PMD 0
117#endif
118#define PTRS_PER_PMD (1UL << BITS_PER_PMD)
119
120
121#define PGDIR_SHIFT (PMD_SHIFT + BITS_PER_PMD)
122#if (PGDIR_SHIFT + PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG
123#define BITS_PER_PGD (BITS_PER_LONG - PGDIR_SHIFT)
124#else
125#define BITS_PER_PGD (PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY)
126#endif
127#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
128#define PGDIR_MASK (~(PGDIR_SIZE-1))
129#define PTRS_PER_PGD (1UL << BITS_PER_PGD)
130#define USER_PTRS_PER_PGD PTRS_PER_PGD
131
132#ifdef CONFIG_64BIT
133#define MAX_ADDRBITS (PGDIR_SHIFT + BITS_PER_PGD)
134#define MAX_ADDRESS (1UL << MAX_ADDRBITS)
135#define SPACEID_SHIFT (MAX_ADDRBITS - 32)
136#else
137#define MAX_ADDRBITS (BITS_PER_LONG)
138#define MAX_ADDRESS (1UL << MAX_ADDRBITS)
139#define SPACEID_SHIFT 0
140#endif
141
142
143
144#if (KERNEL_INITIAL_ORDER) >= (PMD_SHIFT)
145# define PT_INITIAL (1 << (KERNEL_INITIAL_ORDER - PMD_SHIFT))
146#else
147# define PT_INITIAL (1)
148#endif
149
150
151
152
153
154#define FIRST_USER_ADDRESS 0UL
155
156
157
158
159
160#define _PAGE_READ_BIT 31
161#define _PAGE_WRITE_BIT 30
162#define _PAGE_EXEC_BIT 29
163#define _PAGE_GATEWAY_BIT 28
164#define _PAGE_DMB_BIT 27
165#define _PAGE_DIRTY_BIT 26
166#define _PAGE_REFTRAP_BIT 25
167#define _PAGE_NO_CACHE_BIT 24
168#define _PAGE_ACCESSED_BIT 23
169#define _PAGE_PRESENT_BIT 22
170
171#define _PAGE_USER_BIT 20
172
173
174
175
176#define xlate_pabit(x) (31 - x)
177
178
179
180
181#define PTE_SHIFT xlate_pabit(_PAGE_USER_BIT)
182
183
184#define PFN_PTE_SHIFT 12
185
186#define _PAGE_READ (1 << xlate_pabit(_PAGE_READ_BIT))
187#define _PAGE_WRITE (1 << xlate_pabit(_PAGE_WRITE_BIT))
188#define _PAGE_RW (_PAGE_READ | _PAGE_WRITE)
189#define _PAGE_EXEC (1 << xlate_pabit(_PAGE_EXEC_BIT))
190#define _PAGE_GATEWAY (1 << xlate_pabit(_PAGE_GATEWAY_BIT))
191#define _PAGE_DMB (1 << xlate_pabit(_PAGE_DMB_BIT))
192#define _PAGE_DIRTY (1 << xlate_pabit(_PAGE_DIRTY_BIT))
193#define _PAGE_REFTRAP (1 << xlate_pabit(_PAGE_REFTRAP_BIT))
194#define _PAGE_NO_CACHE (1 << xlate_pabit(_PAGE_NO_CACHE_BIT))
195#define _PAGE_ACCESSED (1 << xlate_pabit(_PAGE_ACCESSED_BIT))
196#define _PAGE_PRESENT (1 << xlate_pabit(_PAGE_PRESENT_BIT))
197#define _PAGE_USER (1 << xlate_pabit(_PAGE_USER_BIT))
198
199#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED)
200#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
201#define _PAGE_KERNEL_RO (_PAGE_PRESENT | _PAGE_READ | _PAGE_DIRTY | _PAGE_ACCESSED)
202#define _PAGE_KERNEL_EXEC (_PAGE_KERNEL_RO | _PAGE_EXEC)
203#define _PAGE_KERNEL_RWX (_PAGE_KERNEL_EXEC | _PAGE_WRITE)
204#define _PAGE_KERNEL (_PAGE_KERNEL_RO | _PAGE_WRITE)
205
206
207
208
209
210
211#define _PxD_PRESENT_BIT 31
212#define _PxD_ATTACHED_BIT 30
213#define _PxD_VALID_BIT 29
214
215#define PxD_FLAG_PRESENT (1 << xlate_pabit(_PxD_PRESENT_BIT))
216#define PxD_FLAG_ATTACHED (1 << xlate_pabit(_PxD_ATTACHED_BIT))
217#define PxD_FLAG_VALID (1 << xlate_pabit(_PxD_VALID_BIT))
218#define PxD_FLAG_MASK (0xf)
219#define PxD_FLAG_SHIFT (4)
220#define PxD_VALUE_SHIFT (8)
221
222#ifndef __ASSEMBLY__
223
224#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
225#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE | _PAGE_ACCESSED)
226
227
228
229#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_ACCESSED)
230#define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITE | _PAGE_ACCESSED)
231#define PAGE_EXECREAD __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_EXEC |_PAGE_ACCESSED)
232#define PAGE_COPY PAGE_EXECREAD
233#define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE | _PAGE_EXEC |_PAGE_ACCESSED)
234#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
235#define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL_EXEC)
236#define PAGE_KERNEL_RWX __pgprot(_PAGE_KERNEL_RWX)
237#define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL_RO)
238#define PAGE_KERNEL_UNC __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
239#define PAGE_GATEWAY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_GATEWAY| _PAGE_READ)
240
241
242
243
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249
250
251#define __P000 PAGE_NONE
252#define __P001 PAGE_READONLY
253#define __P010 __P000
254#define __P011 __P001
255#define __P100 PAGE_EXECREAD
256#define __P101 PAGE_EXECREAD
257#define __P110 __P100
258#define __P111 __P101
259
260#define __S000 PAGE_NONE
261#define __S001 PAGE_READONLY
262#define __S010 PAGE_WRITEONLY
263#define __S011 PAGE_SHARED
264#define __S100 PAGE_EXECREAD
265#define __S101 PAGE_EXECREAD
266#define __S110 PAGE_RWX
267#define __S111 PAGE_RWX
268
269
270extern pgd_t swapper_pg_dir[];
271
272
273
274extern pte_t pg0[];
275
276
277
278extern unsigned long *empty_zero_page;
279
280
281
282
283
284
285#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
286
287#define pte_none(x) (pte_val(x) == 0)
288#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
289#define pte_clear(mm, addr, xp) set_pte_at(mm, addr, xp, __pte(0))
290
291#define pmd_flag(x) (pmd_val(x) & PxD_FLAG_MASK)
292#define pmd_address(x) ((unsigned long)(pmd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
293#define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK)
294#define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
295
296#if CONFIG_PGTABLE_LEVELS == 3
297
298
299#define pmd_none(x) (!pmd_val(x) || pmd_flag(x) == PxD_FLAG_ATTACHED)
300#else
301#define pmd_none(x) (!pmd_val(x))
302#endif
303#define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
304#define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
305static inline void pmd_clear(pmd_t *pmd) {
306#if CONFIG_PGTABLE_LEVELS == 3
307 if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
308
309
310 __pmd_val_set(*pmd, PxD_FLAG_ATTACHED);
311 else
312#endif
313 __pmd_val_set(*pmd, 0);
314}
315
316
317
318#if CONFIG_PGTABLE_LEVELS == 3
319#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_address(pgd)))
320#define pgd_page(pgd) virt_to_page((void *)pgd_page_vaddr(pgd))
321
322
323
324#define pgd_none(x) (!pgd_val(x))
325#define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID))
326#define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT)
327static inline void pgd_clear(pgd_t *pgd) {
328#if CONFIG_PGTABLE_LEVELS == 3
329 if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED)
330
331
332 return;
333#endif
334 __pgd_val_set(*pgd, 0);
335}
336#else
337
338
339
340
341
342static inline int pgd_none(pgd_t pgd) { return 0; }
343static inline int pgd_bad(pgd_t pgd) { return 0; }
344static inline int pgd_present(pgd_t pgd) { return 1; }
345static inline void pgd_clear(pgd_t * pgdp) { }
346#endif
347
348
349
350
351
352static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
353static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
354static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
355static inline int pte_special(pte_t pte) { return 0; }
356
357static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
358static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
359static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_WRITE; return pte; }
360static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; }
361static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
362static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return pte; }
363static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
364
365
366
367
368
369#define __mk_pte(addr,pgprot) \
370({ \
371 pte_t __pte; \
372 \
373 pte_val(__pte) = ((((addr)>>PAGE_SHIFT)<<PFN_PTE_SHIFT) + pgprot_val(pgprot)); \
374 \
375 __pte; \
376})
377
378#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
379
380static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
381{
382 pte_t pte;
383 pte_val(pte) = (pfn << PFN_PTE_SHIFT) | pgprot_val(pgprot);
384 return pte;
385}
386
387static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
388{ pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; }
389
390
391
392#define pte_pfn(x) (pte_val(x) >> PFN_PTE_SHIFT)
393
394#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
395
396#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_address(pmd)))
397
398#define __pmd_page(pmd) ((unsigned long) __va(pmd_address(pmd)))
399#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
400
401#define pgd_index(address) ((address) >> PGDIR_SHIFT)
402
403
404#define pgd_offset(mm, address) \
405((mm)->pgd + ((address) >> PGDIR_SHIFT))
406
407
408#define pgd_offset_k(address) pgd_offset(&init_mm, address)
409
410
411
412#if CONFIG_PGTABLE_LEVELS == 3
413#define pmd_offset(dir,address) \
414((pmd_t *) pgd_page_vaddr(*(dir)) + (((address)>>PMD_SHIFT) & (PTRS_PER_PMD-1)))
415#else
416#define pmd_offset(dir,addr) ((pmd_t *) dir)
417#endif
418
419
420#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1))
421#define pte_offset_kernel(pmd, address) \
422 ((pte_t *) pmd_page_vaddr(*(pmd)) + pte_index(address))
423#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
424#define pte_unmap(pte) do { } while (0)
425
426#define pte_unmap(pte) do { } while (0)
427#define pte_unmap_nested(pte) do { } while (0)
428
429extern void paging_init (void);
430
431
432
433#define PG_dcache_dirty PG_arch_1
434
435extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
436
437
438
439#define __swp_type(x) ((x).val & 0x1f)
440#define __swp_offset(x) ( (((x).val >> 6) & 0x7) | \
441 (((x).val >> 8) & ~0x7) )
442#define __swp_entry(type, offset) ((swp_entry_t) { (type) | \
443 ((offset & 0x7) << 6) | \
444 ((offset & ~0x7) << 8) })
445#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
446#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
447
448static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
449{
450 pte_t pte;
451 unsigned long flags;
452
453 if (!pte_young(*ptep))
454 return 0;
455
456 spin_lock_irqsave(&pa_tlb_lock, flags);
457 pte = *ptep;
458 if (!pte_young(pte)) {
459 spin_unlock_irqrestore(&pa_tlb_lock, flags);
460 return 0;
461 }
462 set_pte(ptep, pte_mkold(pte));
463 purge_tlb_entries(vma->vm_mm, addr);
464 spin_unlock_irqrestore(&pa_tlb_lock, flags);
465 return 1;
466}
467
468struct mm_struct;
469static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
470{
471 pte_t old_pte;
472 unsigned long flags;
473
474 spin_lock_irqsave(&pa_tlb_lock, flags);
475 old_pte = *ptep;
476 set_pte(ptep, __pte(0));
477 if (pte_inserted(old_pte))
478 purge_tlb_entries(mm, addr);
479 spin_unlock_irqrestore(&pa_tlb_lock, flags);
480
481 return old_pte;
482}
483
484static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
485{
486 unsigned long flags;
487 spin_lock_irqsave(&pa_tlb_lock, flags);
488 set_pte(ptep, pte_wrprotect(*ptep));
489 purge_tlb_entries(mm, addr);
490 spin_unlock_irqrestore(&pa_tlb_lock, flags);
491}
492
493#define pte_same(A,B) (pte_val(A) == pte_val(B))
494
495#endif
496
497
498
499#define _PAGE_SIZE_ENCODING_4K 0
500#define _PAGE_SIZE_ENCODING_16K 1
501#define _PAGE_SIZE_ENCODING_64K 2
502#define _PAGE_SIZE_ENCODING_256K 3
503#define _PAGE_SIZE_ENCODING_1M 4
504#define _PAGE_SIZE_ENCODING_4M 5
505#define _PAGE_SIZE_ENCODING_16M 6
506#define _PAGE_SIZE_ENCODING_64M 7
507
508#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
509# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4K
510#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
511# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16K
512#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
513# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_64K
514#endif
515
516
517#define pgprot_noncached(prot) __pgprot(pgprot_val(prot) | _PAGE_NO_CACHE)
518
519
520
521#define HAVE_ARCH_UNMAPPED_AREA
522#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
523
524#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
525#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
526#define __HAVE_ARCH_PTEP_SET_WRPROTECT
527#define __HAVE_ARCH_PTE_SAME
528#include <asm-generic/pgtable.h>
529
530#endif
531