1
2#ifndef _PARISC_PGTABLE_H
3#define _PARISC_PGTABLE_H
4
5#include <asm/page.h>
6
7#if CONFIG_PGTABLE_LEVELS == 3
8#include <asm-generic/pgtable-nopud.h>
9#elif CONFIG_PGTABLE_LEVELS == 2
10#include <asm-generic/pgtable-nopmd.h>
11#endif
12
13#include <asm/fixmap.h>
14
15#ifndef __ASSEMBLY__
16
17
18
19
20#include <linux/bitops.h>
21#include <linux/spinlock.h>
22#include <linux/mm_types.h>
23#include <asm/processor.h>
24#include <asm/cache.h>
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39#define kern_addr_valid(addr) (1)
40
41
42
43
44extern spinlock_t pa_tlb_flush_lock;
45#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
46extern int pa_serialize_tlb_flushes;
47#else
48#define pa_serialize_tlb_flushes (0)
49#endif
50
51#define purge_tlb_start(flags) do { \
52 if (pa_serialize_tlb_flushes) \
53 spin_lock_irqsave(&pa_tlb_flush_lock, flags); \
54 else \
55 local_irq_save(flags); \
56 } while (0)
57#define purge_tlb_end(flags) do { \
58 if (pa_serialize_tlb_flushes) \
59 spin_unlock_irqrestore(&pa_tlb_flush_lock, flags); \
60 else \
61 local_irq_restore(flags); \
62 } while (0)
63
64
65
66
67
68static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
69{
70 unsigned long flags;
71
72 purge_tlb_start(flags);
73 mtsp(mm->context, 1);
74 pdtlb(addr);
75 pitlb(addr);
76 purge_tlb_end(flags);
77}
78
79
80
81
82
83#define set_pte(pteptr, pteval) \
84 do { \
85 *(pteptr) = (pteval); \
86 barrier(); \
87 } while(0)
88
89#define set_pte_at(mm, addr, pteptr, pteval) \
90 do { \
91 *(pteptr) = (pteval); \
92 purge_tlb_entries(mm, addr); \
93 } while (0)
94
95#endif
96
97#define pte_ERROR(e) \
98 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
99#if CONFIG_PGTABLE_LEVELS == 3
100#define pmd_ERROR(e) \
101 printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, (unsigned long)pmd_val(e))
102#endif
103#define pgd_ERROR(e) \
104 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e))
105
106
107#if defined(CONFIG_64BIT)
108#define KERNEL_INITIAL_ORDER 26
109#else
110#define KERNEL_INITIAL_ORDER 25
111#endif
112#define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER)
113
114#if CONFIG_PGTABLE_LEVELS == 3
115#define PMD_ORDER 1
116#define PGD_ORDER 0
117#else
118#define PGD_ORDER 1
119#endif
120
121
122
123
124#define PLD_SHIFT PAGE_SHIFT
125#define PLD_SIZE PAGE_SIZE
126#define BITS_PER_PTE (PAGE_SHIFT - BITS_PER_PTE_ENTRY)
127#define PTRS_PER_PTE (1UL << BITS_PER_PTE)
128
129
130#if CONFIG_PGTABLE_LEVELS == 3
131#define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE)
132#define PMD_SIZE (1UL << PMD_SHIFT)
133#define PMD_MASK (~(PMD_SIZE-1))
134#define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY)
135#define PTRS_PER_PMD (1UL << BITS_PER_PMD)
136#else
137#define BITS_PER_PMD 0
138#endif
139
140
141#define PGDIR_SHIFT (PLD_SHIFT + BITS_PER_PTE + BITS_PER_PMD)
142#if (PGDIR_SHIFT + PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG
143#define BITS_PER_PGD (BITS_PER_LONG - PGDIR_SHIFT)
144#else
145#define BITS_PER_PGD (PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY)
146#endif
147#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
148#define PGDIR_MASK (~(PGDIR_SIZE-1))
149#define PTRS_PER_PGD (1UL << BITS_PER_PGD)
150#define USER_PTRS_PER_PGD PTRS_PER_PGD
151
152#ifdef CONFIG_64BIT
153#define MAX_ADDRBITS (PGDIR_SHIFT + BITS_PER_PGD)
154#define MAX_ADDRESS (1UL << MAX_ADDRBITS)
155#define SPACEID_SHIFT (MAX_ADDRBITS - 32)
156#else
157#define MAX_ADDRBITS (BITS_PER_LONG)
158#define MAX_ADDRESS (1UL << MAX_ADDRBITS)
159#define SPACEID_SHIFT 0
160#endif
161
162
163
164#if (KERNEL_INITIAL_ORDER) >= (PMD_SHIFT)
165# define PT_INITIAL (1 << (KERNEL_INITIAL_ORDER - PMD_SHIFT))
166#else
167# define PT_INITIAL (1)
168#endif
169
170
171
172
173
174
175
176
177
178#define _PAGE_READ_BIT 31
179#define _PAGE_WRITE_BIT 30
180#define _PAGE_EXEC_BIT 29
181#define _PAGE_GATEWAY_BIT 28
182#define _PAGE_DMB_BIT 27
183#define _PAGE_DIRTY_BIT 26
184#define _PAGE_REFTRAP_BIT 25
185#define _PAGE_NO_CACHE_BIT 24
186#define _PAGE_ACCESSED_BIT 23
187#define _PAGE_PRESENT_BIT 22
188#define _PAGE_HPAGE_BIT 21
189#define _PAGE_USER_BIT 20
190
191
192
193
194#define xlate_pabit(x) (31 - x)
195
196
197
198
199#define PTE_SHIFT xlate_pabit(_PAGE_USER_BIT)
200
201
202#define PFN_PTE_SHIFT 12
203
204#define _PAGE_READ (1 << xlate_pabit(_PAGE_READ_BIT))
205#define _PAGE_WRITE (1 << xlate_pabit(_PAGE_WRITE_BIT))
206#define _PAGE_RW (_PAGE_READ | _PAGE_WRITE)
207#define _PAGE_EXEC (1 << xlate_pabit(_PAGE_EXEC_BIT))
208#define _PAGE_GATEWAY (1 << xlate_pabit(_PAGE_GATEWAY_BIT))
209#define _PAGE_DMB (1 << xlate_pabit(_PAGE_DMB_BIT))
210#define _PAGE_DIRTY (1 << xlate_pabit(_PAGE_DIRTY_BIT))
211#define _PAGE_REFTRAP (1 << xlate_pabit(_PAGE_REFTRAP_BIT))
212#define _PAGE_NO_CACHE (1 << xlate_pabit(_PAGE_NO_CACHE_BIT))
213#define _PAGE_ACCESSED (1 << xlate_pabit(_PAGE_ACCESSED_BIT))
214#define _PAGE_PRESENT (1 << xlate_pabit(_PAGE_PRESENT_BIT))
215#define _PAGE_HUGE (1 << xlate_pabit(_PAGE_HPAGE_BIT))
216#define _PAGE_USER (1 << xlate_pabit(_PAGE_USER_BIT))
217
218#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED)
219#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
220#define _PAGE_KERNEL_RO (_PAGE_PRESENT | _PAGE_READ | _PAGE_DIRTY | _PAGE_ACCESSED)
221#define _PAGE_KERNEL_EXEC (_PAGE_KERNEL_RO | _PAGE_EXEC)
222#define _PAGE_KERNEL_RWX (_PAGE_KERNEL_EXEC | _PAGE_WRITE)
223#define _PAGE_KERNEL (_PAGE_KERNEL_RO | _PAGE_WRITE)
224
225
226
227
228
229
230#define _PxD_PRESENT_BIT 31
231#define _PxD_VALID_BIT 30
232
233#define PxD_FLAG_PRESENT (1 << xlate_pabit(_PxD_PRESENT_BIT))
234#define PxD_FLAG_VALID (1 << xlate_pabit(_PxD_VALID_BIT))
235#define PxD_FLAG_MASK (0xf)
236#define PxD_FLAG_SHIFT (4)
237#define PxD_VALUE_SHIFT (PFN_PTE_SHIFT-PxD_FLAG_SHIFT)
238
239#ifndef __ASSEMBLY__
240
241#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_USER)
242#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE)
243
244
245
246#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ)
247#define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITE)
248#define PAGE_EXECREAD __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_EXEC)
249#define PAGE_COPY PAGE_EXECREAD
250#define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
251#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
252#define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL_EXEC)
253#define PAGE_KERNEL_RWX __pgprot(_PAGE_KERNEL_RWX)
254#define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL_RO)
255#define PAGE_KERNEL_UNC __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
256#define PAGE_GATEWAY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_GATEWAY| _PAGE_READ)
257
258
259
260
261
262
263
264
265
266
267
268#define __P000 PAGE_NONE
269#define __P001 PAGE_READONLY
270#define __P010 __P000
271#define __P011 __P001
272#define __P100 PAGE_EXECREAD
273#define __P101 PAGE_EXECREAD
274#define __P110 __P100
275#define __P111 __P101
276
277#define __S000 PAGE_NONE
278#define __S001 PAGE_READONLY
279#define __S010 PAGE_WRITEONLY
280#define __S011 PAGE_SHARED
281#define __S100 PAGE_EXECREAD
282#define __S101 PAGE_EXECREAD
283#define __S110 PAGE_RWX
284#define __S111 PAGE_RWX
285
286
287extern pgd_t swapper_pg_dir[];
288
289
290
291extern pte_t pg0[];
292
293
294
295extern unsigned long *empty_zero_page;
296
297
298
299
300
301
302#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
303
304#define pte_none(x) (pte_val(x) == 0)
305#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
306#define pte_clear(mm, addr, xp) set_pte_at(mm, addr, xp, __pte(0))
307
308#define pmd_flag(x) (pmd_val(x) & PxD_FLAG_MASK)
309#define pmd_address(x) ((unsigned long)(pmd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
310#define pud_flag(x) (pud_val(x) & PxD_FLAG_MASK)
311#define pud_address(x) ((unsigned long)(pud_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
312#define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK)
313#define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
314
315#define pmd_none(x) (!pmd_val(x))
316#define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
317#define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
318static inline void pmd_clear(pmd_t *pmd) {
319 set_pmd(pmd, __pmd(0));
320}
321
322
323
324#if CONFIG_PGTABLE_LEVELS == 3
325#define pud_pgtable(pud) ((pmd_t *) __va(pud_address(pud)))
326#define pud_page(pud) virt_to_page((void *)pud_pgtable(pud))
327
328
329
330#define pud_none(x) (!pud_val(x))
331#define pud_bad(x) (!(pud_flag(x) & PxD_FLAG_VALID))
332#define pud_present(x) (pud_flag(x) & PxD_FLAG_PRESENT)
333static inline void pud_clear(pud_t *pud) {
334 set_pud(pud, __pud(0));
335}
336#endif
337
338
339
340
341
342static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
343static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
344static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
345
346static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
347static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
348static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_WRITE; return pte; }
349static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; }
350static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
351static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return pte; }
352
353
354
355
356#ifdef CONFIG_HUGETLB_PAGE
357#define pte_huge(pte) (pte_val(pte) & _PAGE_HUGE)
358#define pte_mkhuge(pte) (__pte(pte_val(pte) | \
359 (parisc_requires_coherency() ? 0 : _PAGE_HUGE)))
360#else
361#define pte_huge(pte) (0)
362#define pte_mkhuge(pte) (pte)
363#endif
364
365
366
367
368
369
370#define __mk_pte(addr,pgprot) \
371({ \
372 pte_t __pte; \
373 \
374 pte_val(__pte) = ((((addr)>>PAGE_SHIFT)<<PFN_PTE_SHIFT) + pgprot_val(pgprot)); \
375 \
376 __pte; \
377})
378
379#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
380
381static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
382{
383 pte_t pte;
384 pte_val(pte) = (pfn << PFN_PTE_SHIFT) | pgprot_val(pgprot);
385 return pte;
386}
387
388static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
389{ pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; }
390
391
392
393#define pte_pfn(x) (pte_val(x) >> PFN_PTE_SHIFT)
394
395#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
396
397static inline unsigned long pmd_page_vaddr(pmd_t pmd)
398{
399 return ((unsigned long) __va(pmd_address(pmd)));
400}
401
402#define __pmd_page(pmd) ((unsigned long) __va(pmd_address(pmd)))
403#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
404
405
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 pte_t pte;
429
430 if (!pte_young(*ptep))
431 return 0;
432
433 pte = *ptep;
434 if (!pte_young(pte)) {
435 return 0;
436 }
437 set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte));
438 return 1;
439}
440
441struct mm_struct;
442static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
443{
444 pte_t old_pte;
445
446 old_pte = *ptep;
447 set_pte_at(mm, addr, ptep, __pte(0));
448
449 return old_pte;
450}
451
452static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
453{
454 set_pte_at(mm, addr, ptep, pte_wrprotect(*ptep));
455}
456
457#define pte_same(A,B) (pte_val(A) == pte_val(B))
458
459struct seq_file;
460extern void arch_report_meminfo(struct seq_file *m);
461
462#endif
463
464
465
466#define _PAGE_SIZE_ENCODING_4K 0
467#define _PAGE_SIZE_ENCODING_16K 1
468#define _PAGE_SIZE_ENCODING_64K 2
469#define _PAGE_SIZE_ENCODING_256K 3
470#define _PAGE_SIZE_ENCODING_1M 4
471#define _PAGE_SIZE_ENCODING_4M 5
472#define _PAGE_SIZE_ENCODING_16M 6
473#define _PAGE_SIZE_ENCODING_64M 7
474
475#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
476# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4K
477#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
478# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16K
479#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
480# define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_64K
481#endif
482
483
484#define pgprot_noncached(prot) __pgprot(pgprot_val(prot) | _PAGE_NO_CACHE)
485
486
487
488#define HAVE_ARCH_UNMAPPED_AREA
489#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
490
491#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
492#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
493#define __HAVE_ARCH_PTEP_SET_WRPROTECT
494#define __HAVE_ARCH_PTE_SAME
495
496#endif
497