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 <asm/processor.h>
16#include <asm/cache.h>
17
18struct vm_area_struct;
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33#define kern_addr_valid(addr) (1)
34
35
36
37
38
39#define set_pte(pteptr, pteval) \
40 do{ \
41 *(pteptr) = (pteval); \
42 } while(0)
43#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
44
45#endif
46
47#define pte_ERROR(e) \
48 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
49#define pmd_ERROR(e) \
50 printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, (unsigned long)pmd_val(e))
51#define pgd_ERROR(e) \
52 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e))
53
54
55#define KERNEL_INITIAL_ORDER 24
56#define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER)
57
58#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
59#define PT_NLEVELS 3
60#define PGD_ORDER 1
61#define PMD_ORDER 1
62#define PGD_ALLOC_ORDER 2
63#else
64#define PT_NLEVELS 2
65#define PGD_ORDER 1
66#define PGD_ALLOC_ORDER PGD_ORDER
67#endif
68
69
70
71
72#define PLD_SHIFT PAGE_SHIFT
73#define PLD_SIZE PAGE_SIZE
74#define BITS_PER_PTE (PAGE_SHIFT - BITS_PER_PTE_ENTRY)
75#define PTRS_PER_PTE (1UL << BITS_PER_PTE)
76
77
78#define pgtable_cache_init() do { } while (0)
79
80#define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE)
81#define PMD_SIZE (1UL << PMD_SHIFT)
82#define PMD_MASK (~(PMD_SIZE-1))
83#if PT_NLEVELS == 3
84#define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY)
85#else
86#define BITS_PER_PMD 0
87#endif
88#define PTRS_PER_PMD (1UL << BITS_PER_PMD)
89
90
91#define PGDIR_SHIFT (PMD_SHIFT + BITS_PER_PMD)
92#if (PGDIR_SHIFT + PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG
93#define BITS_PER_PGD (BITS_PER_LONG - PGDIR_SHIFT)
94#else
95#define BITS_PER_PGD (PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY)
96#endif
97#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
98#define PGDIR_MASK (~(PGDIR_SIZE-1))
99#define PTRS_PER_PGD (1UL << BITS_PER_PGD)
100#define USER_PTRS_PER_PGD PTRS_PER_PGD
101
102#ifdef CONFIG_64BIT
103#define MAX_ADDRBITS (PGDIR_SHIFT + BITS_PER_PGD)
104#define MAX_ADDRESS (1UL << MAX_ADDRBITS)
105#define SPACEID_SHIFT (MAX_ADDRBITS - 32)
106#else
107#define MAX_ADDRBITS (BITS_PER_LONG)
108#define MAX_ADDRESS (1UL << MAX_ADDRBITS)
109#define SPACEID_SHIFT 0
110#endif
111
112
113
114#if (KERNEL_INITIAL_ORDER) >= (PMD_SHIFT)
115# define PT_INITIAL (1 << (KERNEL_INITIAL_ORDER - PMD_SHIFT))
116#else
117# define PT_INITIAL (1)
118#endif
119
120
121
122
123
124#define FIRST_USER_ADDRESS 0
125
126
127
128
129
130#define _PAGE_READ_BIT 31
131#define _PAGE_WRITE_BIT 30
132#define _PAGE_EXEC_BIT 29
133#define _PAGE_GATEWAY_BIT 28
134#define _PAGE_DMB_BIT 27
135#define _PAGE_DIRTY_BIT 26
136#define _PAGE_FILE_BIT _PAGE_DIRTY_BIT
137#define _PAGE_REFTRAP_BIT 25
138#define _PAGE_NO_CACHE_BIT 24
139#define _PAGE_ACCESSED_BIT 23
140#define _PAGE_PRESENT_BIT 22
141#define _PAGE_FLUSH_BIT 21
142
143#define _PAGE_USER_BIT 20
144
145
146
147
148#define xlate_pabit(x) (31 - x)
149
150
151
152
153#define PTE_SHIFT xlate_pabit(_PAGE_USER_BIT)
154
155
156#define PFN_PTE_SHIFT 12
157
158
159
160#define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_SHIFT)
161
162#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_SHIFT)
163#define pgoff_to_pte(off) ((pte_t) { ((off) << PTE_SHIFT) | _PAGE_FILE })
164
165#define _PAGE_READ (1 << xlate_pabit(_PAGE_READ_BIT))
166#define _PAGE_WRITE (1 << xlate_pabit(_PAGE_WRITE_BIT))
167#define _PAGE_RW (_PAGE_READ | _PAGE_WRITE)
168#define _PAGE_EXEC (1 << xlate_pabit(_PAGE_EXEC_BIT))
169#define _PAGE_GATEWAY (1 << xlate_pabit(_PAGE_GATEWAY_BIT))
170#define _PAGE_DMB (1 << xlate_pabit(_PAGE_DMB_BIT))
171#define _PAGE_DIRTY (1 << xlate_pabit(_PAGE_DIRTY_BIT))
172#define _PAGE_REFTRAP (1 << xlate_pabit(_PAGE_REFTRAP_BIT))
173#define _PAGE_NO_CACHE (1 << xlate_pabit(_PAGE_NO_CACHE_BIT))
174#define _PAGE_ACCESSED (1 << xlate_pabit(_PAGE_ACCESSED_BIT))
175#define _PAGE_PRESENT (1 << xlate_pabit(_PAGE_PRESENT_BIT))
176#define _PAGE_FLUSH (1 << xlate_pabit(_PAGE_FLUSH_BIT))
177#define _PAGE_USER (1 << xlate_pabit(_PAGE_USER_BIT))
178#define _PAGE_FILE (1 << xlate_pabit(_PAGE_FILE_BIT))
179
180#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED)
181#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
182#define _PAGE_KERNEL (_PAGE_PRESENT | _PAGE_EXEC | _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED)
183
184
185
186
187
188
189#define _PxD_PRESENT_BIT 31
190#define _PxD_ATTACHED_BIT 30
191#define _PxD_VALID_BIT 29
192
193#define PxD_FLAG_PRESENT (1 << xlate_pabit(_PxD_PRESENT_BIT))
194#define PxD_FLAG_ATTACHED (1 << xlate_pabit(_PxD_ATTACHED_BIT))
195#define PxD_FLAG_VALID (1 << xlate_pabit(_PxD_VALID_BIT))
196#define PxD_FLAG_MASK (0xf)
197#define PxD_FLAG_SHIFT (4)
198#define PxD_VALUE_SHIFT (8)
199
200#ifndef __ASSEMBLY__
201
202#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
203#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE | _PAGE_ACCESSED)
204
205
206
207#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_ACCESSED)
208#define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITE | _PAGE_ACCESSED)
209#define PAGE_EXECREAD __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_EXEC |_PAGE_ACCESSED)
210#define PAGE_COPY PAGE_EXECREAD
211#define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE | _PAGE_EXEC |_PAGE_ACCESSED)
212#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
213#define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL & ~_PAGE_WRITE)
214#define PAGE_KERNEL_UNC __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
215#define PAGE_GATEWAY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_GATEWAY| _PAGE_READ)
216#define PAGE_FLUSH __pgprot(_PAGE_FLUSH)
217
218
219
220
221
222
223
224
225
226
227
228#define __P000 PAGE_NONE
229#define __P001 PAGE_READONLY
230#define __P010 __P000
231#define __P011 __P001
232#define __P100 PAGE_EXECREAD
233#define __P101 PAGE_EXECREAD
234#define __P110 __P100
235#define __P111 __P101
236
237#define __S000 PAGE_NONE
238#define __S001 PAGE_READONLY
239#define __S010 PAGE_WRITEONLY
240#define __S011 PAGE_SHARED
241#define __S100 PAGE_EXECREAD
242#define __S101 PAGE_EXECREAD
243#define __S110 PAGE_RWX
244#define __S111 PAGE_RWX
245
246
247extern pgd_t swapper_pg_dir[];
248
249
250
251extern pte_t pg0[];
252
253
254
255extern unsigned long *empty_zero_page;
256
257
258
259
260
261
262#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
263
264#define pte_none(x) ((pte_val(x) == 0) || (pte_val(x) & _PAGE_FLUSH))
265#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
266#define pte_clear(mm,addr,xp) do { pte_val(*(xp)) = 0; } while (0)
267
268#define pmd_flag(x) (pmd_val(x) & PxD_FLAG_MASK)
269#define pmd_address(x) ((unsigned long)(pmd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
270#define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK)
271#define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
272
273#if PT_NLEVELS == 3
274
275
276#define pmd_none(x) (!pmd_val(x) || pmd_flag(x) == PxD_FLAG_ATTACHED)
277#else
278#define pmd_none(x) (!pmd_val(x))
279#endif
280#define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
281#define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
282static inline void pmd_clear(pmd_t *pmd) {
283#if PT_NLEVELS == 3
284 if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
285
286
287 __pmd_val_set(*pmd, PxD_FLAG_ATTACHED);
288 else
289#endif
290 __pmd_val_set(*pmd, 0);
291}
292
293
294
295#if PT_NLEVELS == 3
296#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_address(pgd)))
297#define pgd_page(pgd) virt_to_page((void *)pgd_page_vaddr(pgd))
298
299
300
301#define pgd_none(x) (!pgd_val(x))
302#define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID))
303#define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT)
304static inline void pgd_clear(pgd_t *pgd) {
305#if PT_NLEVELS == 3
306 if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED)
307
308
309 return;
310#endif
311 __pgd_val_set(*pgd, 0);
312}
313#else
314
315
316
317
318
319static inline int pgd_none(pgd_t pgd) { return 0; }
320static inline int pgd_bad(pgd_t pgd) { return 0; }
321static inline int pgd_present(pgd_t pgd) { return 1; }
322static inline void pgd_clear(pgd_t * pgdp) { }
323#endif
324
325
326
327
328
329static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
330static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
331static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
332static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
333static inline int pte_special(pte_t pte) { return 0; }
334
335static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
336static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
337static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_WRITE; return pte; }
338static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; }
339static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
340static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return pte; }
341static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
342
343
344
345
346
347#define __mk_pte(addr,pgprot) \
348({ \
349 pte_t __pte; \
350 \
351 pte_val(__pte) = ((((addr)>>PAGE_SHIFT)<<PFN_PTE_SHIFT) + pgprot_val(pgprot)); \
352 \
353 __pte; \
354})
355
356#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
357
358static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
359{
360 pte_t pte;
361 pte_val(pte) = (pfn << PFN_PTE_SHIFT) | pgprot_val(pgprot);
362 return pte;
363}
364
365static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
366{ pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; }
367
368
369
370#define pte_pfn(x) (pte_val(x) >> PFN_PTE_SHIFT)
371
372#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
373
374#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_address(pmd)))
375
376#define __pmd_page(pmd) ((unsigned long) __va(pmd_address(pmd)))
377#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
378
379#define pgd_index(address) ((address) >> PGDIR_SHIFT)
380
381
382#define pgd_offset(mm, address) \
383((mm)->pgd + ((address) >> PGDIR_SHIFT))
384
385
386#define pgd_offset_k(address) pgd_offset(&init_mm, address)
387
388
389
390#if PT_NLEVELS == 3
391#define pmd_offset(dir,address) \
392((pmd_t *) pgd_page_vaddr(*(dir)) + (((address)>>PMD_SHIFT) & (PTRS_PER_PMD-1)))
393#else
394#define pmd_offset(dir,addr) ((pmd_t *) dir)
395#endif
396
397
398#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1))
399#define pte_offset_kernel(pmd, address) \
400 ((pte_t *) pmd_page_vaddr(*(pmd)) + pte_index(address))
401#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
402#define pte_unmap(pte) do { } while (0)
403
404#define pte_unmap(pte) do { } while (0)
405#define pte_unmap_nested(pte) do { } while (0)
406
407extern void paging_init (void);
408
409
410
411#define PG_dcache_dirty PG_arch_1
412
413extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
414
415
416
417#define __swp_type(x) ((x).val & 0x1f)
418#define __swp_offset(x) ( (((x).val >> 6) & 0x7) | \
419 (((x).val >> 8) & ~0x7) )
420#define __swp_entry(type, offset) ((swp_entry_t) { (type) | \
421 ((offset & 0x7) << 6) | \
422 ((offset & ~0x7) << 8) })
423#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
424#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
425
426static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
427{
428#ifdef CONFIG_SMP
429 if (!pte_young(*ptep))
430 return 0;
431 return test_and_clear_bit(xlate_pabit(_PAGE_ACCESSED_BIT), &pte_val(*ptep));
432#else
433 pte_t pte = *ptep;
434 if (!pte_young(pte))
435 return 0;
436 set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte));
437 return 1;
438#endif
439}
440
441extern spinlock_t pa_dbit_lock;
442
443struct mm_struct;
444static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
445{
446 pte_t old_pte;
447 pte_t pte;
448
449 spin_lock(&pa_dbit_lock);
450 pte = old_pte = *ptep;
451 pte_val(pte) &= ~_PAGE_PRESENT;
452 pte_val(pte) |= _PAGE_FLUSH;
453 set_pte_at(mm,addr,ptep,pte);
454 spin_unlock(&pa_dbit_lock);
455
456 return old_pte;
457}
458
459static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
460{
461#ifdef CONFIG_SMP
462 unsigned long new, old;
463
464 do {
465 old = pte_val(*ptep);
466 new = pte_val(pte_wrprotect(__pte (old)));
467 } while (cmpxchg((unsigned long *) ptep, old, new) != old);
468#else
469 pte_t old_pte = *ptep;
470 set_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
471#endif
472}
473
474#define pte_same(A,B) (pte_val(A) == pte_val(B))
475
476#endif
477
478
479
480#define _PAGE_SIZE_ENCODING_4K 0
481#define _PAGE_SIZE_ENCODING_16K 1
482#define _PAGE_SIZE_ENCODING_64K 2
483#define _PAGE_SIZE_ENCODING_256K 3
484#define _PAGE_SIZE_ENCODING_1M 4
485#define _PAGE_SIZE_ENCODING_4M 5
486#define _PAGE_SIZE_ENCODING_16M 6
487#define _PAGE_SIZE_ENCODING_64M 7
488
489#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
490# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4K
491#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
492# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16K
493#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
494# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_64K
495#endif
496
497
498#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
499 remap_pfn_range(vma, vaddr, pfn, size, prot)
500
501#define pgprot_noncached(prot) __pgprot(pgprot_val(prot) | _PAGE_NO_CACHE)
502
503
504
505#define HAVE_ARCH_UNMAPPED_AREA
506
507#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
508#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
509#define __HAVE_ARCH_PTEP_SET_WRPROTECT
510#define __HAVE_ARCH_PTE_SAME
511#include <asm-generic/pgtable.h>
512
513#endif
514