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35#ifndef _ASM_ARC_PGTABLE_H
36#define _ASM_ARC_PGTABLE_H
37
38#include <asm/page.h>
39#include <asm/mmu.h>
40#include <asm-generic/pgtable-nopmd.h>
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55
56#if (CONFIG_ARC_MMU_VER <= 2)
57
58#define _PAGE_ACCESSED (1<<1)
59#define _PAGE_CACHEABLE (1<<2)
60#define _PAGE_U_EXECUTE (1<<3)
61#define _PAGE_U_WRITE (1<<4)
62#define _PAGE_U_READ (1<<5)
63#define _PAGE_K_EXECUTE (1<<6)
64#define _PAGE_K_WRITE (1<<7)
65#define _PAGE_K_READ (1<<8)
66#define _PAGE_GLOBAL (1<<9)
67#define _PAGE_MODIFIED (1<<10)
68#define _PAGE_FILE (1<<10)
69#define _PAGE_PRESENT (1<<11)
70
71#else
72
73
74#define _PAGE_CACHEABLE (1<<0)
75#define _PAGE_U_EXECUTE (1<<1)
76#define _PAGE_U_WRITE (1<<2)
77#define _PAGE_U_READ (1<<3)
78#define _PAGE_K_EXECUTE (1<<4)
79#define _PAGE_K_WRITE (1<<5)
80#define _PAGE_K_READ (1<<6)
81#define _PAGE_ACCESSED (1<<7)
82
83
84#define _PAGE_GLOBAL (1<<8)
85#define _PAGE_PRESENT (1<<9)
86#define _PAGE_SHARED_CODE (1<<10)
87
88
89#define _PAGE_MODIFIED (1<<11)
90#define _PAGE_FILE (1<<12)
91
92#define _PAGE_SHARED_CODE_H (1<<31)
93#endif
94
95
96#define _K_PAGE_PERMS (_PAGE_K_EXECUTE | _PAGE_K_WRITE | _PAGE_K_READ | \
97 _PAGE_GLOBAL | _PAGE_PRESENT)
98
99#ifdef CONFIG_ARC_CACHE_PAGES
100#define _PAGE_DEF_CACHEABLE _PAGE_CACHEABLE
101#else
102#define _PAGE_DEF_CACHEABLE (0)
103#endif
104
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108
109
110#define ___DEF (_PAGE_PRESENT | _PAGE_DEF_CACHEABLE)
111
112#define _PAGE_READ (_PAGE_U_READ | _PAGE_K_READ)
113#define _PAGE_WRITE (_PAGE_U_WRITE | _PAGE_K_WRITE)
114#define _PAGE_EXECUTE (_PAGE_U_EXECUTE | _PAGE_K_EXECUTE)
115
116
117#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED)
118
119
120#define PAGE_U_NONE __pgprot(___DEF)
121#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
122#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
123#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
124#define PAGE_U_X_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE | \
125 _PAGE_EXECUTE)
126
127#define PAGE_SHARED PAGE_U_W_R
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132
133#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_DEF_CACHEABLE)
134
135
136#define PAGE_KERNEL_NO_CACHE __pgprot(_K_PAGE_PERMS)
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157#define __P000 PAGE_U_NONE
158#define __P001 PAGE_U_R
159#define __P010 PAGE_U_R
160#define __P011 PAGE_U_R
161#define __P100 PAGE_U_X_R
162#define __P101 PAGE_U_X_R
163#define __P110 PAGE_U_X_R
164#define __P111 PAGE_U_X_R
165
166#define __S000 PAGE_U_NONE
167#define __S001 PAGE_U_R
168#define __S010 PAGE_U_W_R
169#define __S011 PAGE_U_W_R
170#define __S100 PAGE_U_X_R
171#define __S101 PAGE_U_X_R
172#define __S110 PAGE_U_X_W_R
173#define __S111 PAGE_U_X_W_R
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192
193#define BITS_IN_PAGE PAGE_SHIFT
194
195
196#if defined(CONFIG_ARC_PAGE_SIZE_8K)
197#define BITS_FOR_PTE 8
198#elif defined(CONFIG_ARC_PAGE_SIZE_16K)
199#define BITS_FOR_PTE 8
200#elif defined(CONFIG_ARC_PAGE_SIZE_4K)
201#define BITS_FOR_PTE 9
202#endif
203
204#define BITS_FOR_PGD (32 - BITS_FOR_PTE - BITS_IN_PAGE)
205
206#define PGDIR_SHIFT (BITS_FOR_PTE + BITS_IN_PAGE)
207#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
208#define PGDIR_MASK (~(PGDIR_SIZE-1))
209
210#ifdef __ASSEMBLY__
211#define PTRS_PER_PTE (1 << BITS_FOR_PTE)
212#define PTRS_PER_PGD (1 << BITS_FOR_PGD)
213#else
214#define PTRS_PER_PTE (1UL << BITS_FOR_PTE)
215#define PTRS_PER_PGD (1UL << BITS_FOR_PGD)
216#endif
217
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220
221#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
222
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226
227#define FIRST_USER_ADDRESS 0
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232
233
234#ifndef __ASSEMBLY__
235
236#define pte_ERROR(e) \
237 pr_crit("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
238#define pgd_ERROR(e) \
239 pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
240
241
242extern char empty_zero_page[PAGE_SIZE];
243#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
244
245#define pte_unmap(pte) do { } while (0)
246#define pte_unmap_nested(pte) do { } while (0)
247
248#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
249#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
250
251
252#define pmd_page(pmd) virt_to_page(pmd_val(pmd) & PAGE_MASK)
253
254
255#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
256
257
258static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
259{
260 pmd_val(*pmdp) = (unsigned long)ptep;
261}
262
263#define pte_none(x) (!pte_val(x))
264#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
265#define pte_clear(mm, addr, ptep) set_pte_at(mm, addr, ptep, __pte(0))
266
267#define pmd_none(x) (!pmd_val(x))
268#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
269#define pmd_present(x) (pmd_val(x))
270#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
271
272#define pte_page(x) (mem_map + \
273 (unsigned long)(((pte_val(x) - PAGE_OFFSET) >> PAGE_SHIFT)))
274
275#define mk_pte(page, pgprot) \
276({ \
277 pte_t pte; \
278 pte_val(pte) = __pa(page_address(page)) + pgprot_val(pgprot); \
279 pte; \
280})
281
282
283static inline int pte_file(pte_t pte)
284{
285 return pte_val(pte) & _PAGE_FILE;
286}
287
288#define PTE_FILE_MAX_BITS 30
289#define pgoff_to_pte(x) __pte(x)
290#define pte_to_pgoff(x) (pte_val(x) >> 2)
291#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
292#define pfn_pte(pfn, prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
293#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
294
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297
298
299#define pte_offset(dir, addr) ((pte_t *)(pmd_page_vaddr(*dir)) +\
300 __pte_index(addr))
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302
303#define pte_offset_kernel(dir, addr) pte_offset(dir, addr)
304#define pte_offset_map(dir, addr) pte_offset(dir, addr)
305
306
307#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
308#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
309#define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED)
310#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
311#define pte_special(pte) (0)
312
313#define PTE_BIT_FUNC(fn, op) \
314 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
315
316PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
317PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
318PTE_BIT_FUNC(mkclean, &= ~(_PAGE_MODIFIED));
319PTE_BIT_FUNC(mkdirty, |= (_PAGE_MODIFIED));
320PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
321PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
322PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
323PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
324
325static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
326
327static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
328{
329 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
330}
331
332
333#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
334
335static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
336 pte_t *ptep, pte_t pteval)
337{
338 set_pte(ptep, pteval);
339}
340
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343
344#define pgd_offset_k(address) pgd_offset(&init_mm, address)
345#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
346#define pgd_offset(mm, addr) (((mm)->pgd)+pgd_index(addr))
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361#ifndef CONFIG_SMP
362#define pgd_offset_fast(mm, addr) \
363({ \
364 pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0); \
365 pgd_base + pgd_index(addr); \
366})
367#else
368#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
369#endif
370
371extern void paging_init(void);
372extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
373void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
374 pte_t *ptep);
375
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377
378
379
380#define __swp_entry(type, off) ((swp_entry_t) { \
381 ((type) & 0x1f) | ((off) << 13) })
382
383
384#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
385#define __swp_offset(pte_lookalike) ((pte_lookalike).val << 13)
386
387
388#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
389#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
390
391#define kern_addr_valid(addr) (1)
392
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397#define io_remap_pfn_range(vma, from, pfn, size, prot) \
398 remap_pfn_range(vma, from, pfn, size, prot)
399
400#include <asm-generic/pgtable.h>
401
402
403#define HAVE_ARCH_UNMAPPED_AREA
404
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407
408#define pgtable_cache_init() do { } while (0)
409
410#endif
411
412#endif
413