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9#ifndef _ASM_PGTABLE_64_H
10#define _ASM_PGTABLE_64_H
11
12#include <linux/linkage.h>
13
14#include <asm/addrspace.h>
15#include <asm/page.h>
16#include <asm/cachectl.h>
17#include <asm/fixmap.h>
18
19#include <asm-generic/pgtable-nopud.h>
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41#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 3))
42#define PMD_SIZE (1UL << PMD_SHIFT)
43#define PMD_MASK (~(PMD_SIZE-1))
44
45
46#define PGDIR_SHIFT (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3))
47#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
48#define PGDIR_MASK (~(PGDIR_SIZE-1))
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68#ifdef CONFIG_PAGE_SIZE_4KB
69#define PGD_ORDER 1
70#define PUD_ORDER aieeee_attempt_to_allocate_pud
71#define PMD_ORDER 0
72#define PTE_ORDER 0
73#endif
74#ifdef CONFIG_PAGE_SIZE_8KB
75#define PGD_ORDER 0
76#define PUD_ORDER aieeee_attempt_to_allocate_pud
77#define PMD_ORDER 0
78#define PTE_ORDER 0
79#endif
80#ifdef CONFIG_PAGE_SIZE_16KB
81#define PGD_ORDER 0
82#define PUD_ORDER aieeee_attempt_to_allocate_pud
83#define PMD_ORDER 0
84#define PTE_ORDER 0
85#endif
86#ifdef CONFIG_PAGE_SIZE_32KB
87#define PGD_ORDER 0
88#define PUD_ORDER aieeee_attempt_to_allocate_pud
89#define PMD_ORDER 0
90#define PTE_ORDER 0
91#endif
92#ifdef CONFIG_PAGE_SIZE_64KB
93#define PGD_ORDER 0
94#define PUD_ORDER aieeee_attempt_to_allocate_pud
95#define PMD_ORDER 0
96#define PTE_ORDER 0
97#endif
98
99#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))
100#define PTRS_PER_PMD ((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t))
101#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
102
103#if PGDIR_SIZE >= TASK_SIZE
104#define USER_PTRS_PER_PGD (1)
105#else
106#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
107#endif
108#define FIRST_USER_ADDRESS 0UL
109
110#define VMALLOC_START MAP_BASE
111#define VMALLOC_END \
112 (VMALLOC_START + \
113 PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE - (1UL << 32))
114#if defined(CONFIG_MODULES) && defined(KBUILD_64BIT_SYM32) && \
115 VMALLOC_START != CKSSEG
116
117#define MODULE_START CKSSEG
118#define MODULE_END (FIXADDR_START-2*PAGE_SIZE)
119#endif
120
121#define pte_ERROR(e) \
122 printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
123#define pmd_ERROR(e) \
124 printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
125#define pgd_ERROR(e) \
126 printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
127
128extern pte_t invalid_pte_table[PTRS_PER_PTE];
129extern pte_t empty_bad_page_table[PTRS_PER_PTE];
130extern pmd_t invalid_pmd_table[PTRS_PER_PMD];
131extern pmd_t empty_bad_pmd_table[PTRS_PER_PMD];
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135
136static inline int pmd_none(pmd_t pmd)
137{
138 return pmd_val(pmd) == (unsigned long) invalid_pte_table;
139}
140
141#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
142
143static inline int pmd_present(pmd_t pmd)
144{
145 return pmd_val(pmd) != (unsigned long) invalid_pte_table;
146}
147
148static inline void pmd_clear(pmd_t *pmdp)
149{
150 pmd_val(*pmdp) = ((unsigned long) invalid_pte_table);
151}
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156static inline int pud_none(pud_t pud)
157{
158 return pud_val(pud) == (unsigned long) invalid_pmd_table;
159}
160
161static inline int pud_bad(pud_t pud)
162{
163 return pud_val(pud) & ~PAGE_MASK;
164}
165
166static inline int pud_present(pud_t pud)
167{
168 return pud_val(pud) != (unsigned long) invalid_pmd_table;
169}
170
171static inline void pud_clear(pud_t *pudp)
172{
173 pud_val(*pudp) = ((unsigned long) invalid_pmd_table);
174}
175
176#define pte_page(x) pfn_to_page(pte_pfn(x))
177
178#ifdef CONFIG_CPU_VR41XX
179#define pte_pfn(x) ((unsigned long)((x).pte >> (PAGE_SHIFT + 2)))
180#define pfn_pte(pfn, prot) __pte(((pfn) << (PAGE_SHIFT + 2)) | pgprot_val(prot))
181#else
182#define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT))
183#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
184#endif
185
186#define __pgd_offset(address) pgd_index(address)
187#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
188#define __pmd_offset(address) pmd_index(address)
189
190
191#define pgd_offset_k(address) pgd_offset(&init_mm, address)
192
193#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
194#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
195
196
197#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
198
199static inline unsigned long pud_page_vaddr(pud_t pud)
200{
201 return pud_val(pud);
202}
203#define pud_phys(pud) virt_to_phys((void *)pud_val(pud))
204#define pud_page(pud) (pfn_to_page(pud_phys(pud) >> PAGE_SHIFT))
205
206
207static inline pmd_t *pmd_offset(pud_t * pud, unsigned long address)
208{
209 return (pmd_t *) pud_page_vaddr(*pud) + pmd_index(address);
210}
211
212
213#define __pte_offset(address) \
214 (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
215#define pte_offset(dir, address) \
216 ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
217#define pte_offset_kernel(dir, address) \
218 ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
219#define pte_offset_map(dir, address) \
220 ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
221#define pte_offset_map_nested(dir, address) \
222 ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
223#define pte_unmap(pte) ((void)(pte))
224#define pte_unmap_nested(pte) ((void)(pte))
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229extern void pgd_init(unsigned long page);
230extern void pmd_init(unsigned long page, unsigned long pagetable);
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236static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
237{ pte_t pte; pte_val(pte) = (type << 32) | (offset << 40); return pte; }
238
239#define __swp_type(x) (((x).val >> 32) & 0xff)
240#define __swp_offset(x) ((x).val >> 40)
241#define __swp_entry(type, offset) ((swp_entry_t) { pte_val(mk_swap_pte((type), (offset))) })
242#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
243#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
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249#define PTE_FILE_MAX_BITS 56
250
251#define pte_to_pgoff(_pte) ((_pte).pte >> 8)
252#define pgoff_to_pte(off) ((pte_t) { ((off) << 8) | _PAGE_FILE })
253
254#endif
255