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35#ifndef _ASM_ARC_PGTABLE_H
36#define _ASM_ARC_PGTABLE_H
37
38#include <linux/const.h>
39#define __ARCH_USE_5LEVEL_HACK
40#include <asm-generic/pgtable-nopmd.h>
41#include <asm/page.h>
42#include <asm/mmu.h>
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57
58#if (CONFIG_ARC_MMU_VER <= 2)
59
60#define _PAGE_ACCESSED (1<<1)
61#define _PAGE_CACHEABLE (1<<2)
62#define _PAGE_EXECUTE (1<<3)
63#define _PAGE_WRITE (1<<4)
64#define _PAGE_READ (1<<5)
65#define _PAGE_DIRTY (1<<6)
66#define _PAGE_SPECIAL (1<<7)
67#define _PAGE_GLOBAL (1<<8)
68#define _PAGE_PRESENT (1<<10)
69
70#else
71
72#define _PAGE_CACHEABLE (1<<0)
73#define _PAGE_EXECUTE (1<<1)
74#define _PAGE_WRITE (1<<2)
75#define _PAGE_READ (1<<3)
76#define _PAGE_ACCESSED (1<<4)
77#define _PAGE_DIRTY (1<<5)
78#define _PAGE_SPECIAL (1<<6)
79
80#if (CONFIG_ARC_MMU_VER >= 4)
81#define _PAGE_WTHRU (1<<7)
82#endif
83
84#define _PAGE_GLOBAL (1<<8)
85#define _PAGE_PRESENT (1<<9)
86
87#if (CONFIG_ARC_MMU_VER >= 4)
88#define _PAGE_HW_SZ (1<<10)
89#endif
90
91#define _PAGE_SHARED_CODE (1<<11)
92
93
94#define _PAGE_UNUSED_BIT (1<<12)
95#endif
96
97
98#define _K_PAGE_PERMS (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ | \
99 _PAGE_GLOBAL | _PAGE_PRESENT)
100
101#ifndef CONFIG_ARC_CACHE_PAGES
102#undef _PAGE_CACHEABLE
103#define _PAGE_CACHEABLE 0
104#endif
105
106#ifndef _PAGE_HW_SZ
107#define _PAGE_HW_SZ 0
108#endif
109
110
111#define ___DEF (_PAGE_PRESENT | _PAGE_CACHEABLE)
112
113
114#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_SPECIAL)
115
116
117#define PAGE_U_NONE __pgprot(___DEF)
118#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
119#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
120#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
121#define PAGE_U_X_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE | \
122 _PAGE_EXECUTE)
123
124#define PAGE_SHARED PAGE_U_W_R
125
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129
130#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_CACHEABLE)
131
132
133#define PAGE_KERNEL_NO_CACHE __pgprot(_K_PAGE_PERMS)
134
135
136#define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_HW_SZ)
137#define PTE_BITS_RWX (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ)
138
139#ifdef CONFIG_ARC_HAS_PAE40
140#define PTE_BITS_NON_RWX_IN_PD1 (0xff00000000 | PAGE_MASK | _PAGE_CACHEABLE)
141#else
142#define PTE_BITS_NON_RWX_IN_PD1 (PAGE_MASK | _PAGE_CACHEABLE)
143#endif
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164#define __P000 PAGE_U_NONE
165#define __P001 PAGE_U_R
166#define __P010 PAGE_U_R
167#define __P011 PAGE_U_R
168#define __P100 PAGE_U_X_R
169#define __P101 PAGE_U_X_R
170#define __P110 PAGE_U_X_R
171#define __P111 PAGE_U_X_R
172
173#define __S000 PAGE_U_NONE
174#define __S001 PAGE_U_R
175#define __S010 PAGE_U_W_R
176#define __S011 PAGE_U_W_R
177#define __S100 PAGE_U_X_R
178#define __S101 PAGE_U_X_R
179#define __S110 PAGE_U_X_W_R
180#define __S111 PAGE_U_X_W_R
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206#if defined(CONFIG_ARC_HUGEPAGE_16M)
207#define PGDIR_SHIFT 24
208#elif defined(CONFIG_ARC_HUGEPAGE_2M)
209#define PGDIR_SHIFT 21
210#else
211
212
213
214
215#define PGDIR_SHIFT 21
216#endif
217
218#define BITS_FOR_PTE (PGDIR_SHIFT - PAGE_SHIFT)
219#define BITS_FOR_PGD (32 - PGDIR_SHIFT)
220
221#define PGDIR_SIZE _BITUL(PGDIR_SHIFT)
222#define PGDIR_MASK (~(PGDIR_SIZE-1))
223
224#define PTRS_PER_PTE _BITUL(BITS_FOR_PTE)
225#define PTRS_PER_PGD _BITUL(BITS_FOR_PGD)
226
227
228
229
230
231#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
232
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235
236
237#define FIRST_USER_ADDRESS 0UL
238
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242
243
244#ifndef __ASSEMBLY__
245
246#define pte_ERROR(e) \
247 pr_crit("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
248#define pgd_ERROR(e) \
249 pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
250
251
252extern char empty_zero_page[PAGE_SIZE];
253#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
254
255#define pte_unmap(pte) do { } while (0)
256#define pte_unmap_nested(pte) do { } while (0)
257
258#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
259#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
260
261
262#define pmd_page(pmd) virt_to_page(pmd_val(pmd) & PAGE_MASK)
263
264
265#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
266
267
268static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
269{
270 pmd_val(*pmdp) = (unsigned long)ptep;
271}
272
273#define pte_none(x) (!pte_val(x))
274#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
275#define pte_clear(mm, addr, ptep) set_pte_at(mm, addr, ptep, __pte(0))
276
277#define pmd_none(x) (!pmd_val(x))
278#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
279#define pmd_present(x) (pmd_val(x))
280#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
281
282#define pte_page(pte) pfn_to_page(pte_pfn(pte))
283#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
284#define pfn_pte(pfn, prot) __pte(__pfn_to_phys(pfn) | pgprot_val(prot))
285
286
287#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
288#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
289
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293
294#define pte_offset(dir, addr) ((pte_t *)(pmd_page_vaddr(*dir)) +\
295 __pte_index(addr))
296
297
298#define pte_offset_kernel(dir, addr) pte_offset(dir, addr)
299#define pte_offset_map(dir, addr) pte_offset(dir, addr)
300
301
302#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
303#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
304#define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY)
305#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
306#define pte_special(pte) (pte_val(pte) & _PAGE_SPECIAL)
307
308#define PTE_BIT_FUNC(fn, op) \
309 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
310
311PTE_BIT_FUNC(mknotpresent, &= ~(_PAGE_PRESENT));
312PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
313PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
314PTE_BIT_FUNC(mkclean, &= ~(_PAGE_DIRTY));
315PTE_BIT_FUNC(mkdirty, |= (_PAGE_DIRTY));
316PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
317PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
318PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
319PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
320PTE_BIT_FUNC(mkspecial, |= (_PAGE_SPECIAL));
321PTE_BIT_FUNC(mkhuge, |= (_PAGE_HW_SZ));
322
323static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
324{
325 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
326}
327
328
329#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
330
331static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
332 pte_t *ptep, pte_t pteval)
333{
334 set_pte(ptep, pteval);
335}
336
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339
340#define pgd_offset_k(address) pgd_offset(&init_mm, address)
341#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
342#define pgd_offset(mm, addr) (((mm)->pgd)+pgd_index(addr))
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356
357#ifndef CONFIG_SMP
358#define pgd_offset_fast(mm, addr) \
359({ \
360 pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0); \
361 pgd_base + pgd_index(addr); \
362})
363#else
364#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
365#endif
366
367extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
368void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
369 pte_t *ptep);
370
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373
374
375#define __swp_entry(type, off) ((swp_entry_t) { \
376 ((type) & 0x1f) | ((off) << 13) })
377
378
379#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
380#define __swp_offset(pte_lookalike) ((pte_lookalike).val >> 13)
381
382
383#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
384#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
385
386#define kern_addr_valid(addr) (1)
387
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391
392#ifdef CONFIG_TRANSPARENT_HUGEPAGE
393#include <asm/hugepage.h>
394#endif
395
396#include <asm-generic/pgtable.h>
397
398
399#define HAVE_ARCH_UNMAPPED_AREA
400
401
402
403
404#define pgtable_cache_init() do { } while (0)
405
406#endif
407
408#endif
409