1
2#ifndef _ASM_POWERPC_NOHASH_64_PGTABLE_H
3#define _ASM_POWERPC_NOHASH_64_PGTABLE_H
4
5
6
7
8
9#include <linux/sizes.h>
10
11#include <asm/nohash/64/pgtable-4k.h>
12#include <asm/barrier.h>
13#include <asm/asm-const.h>
14
15
16
17
18#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \
19 PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT)
20#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE)
21
22#define PMD_CACHE_INDEX PMD_INDEX_SIZE
23#define PUD_CACHE_INDEX PUD_INDEX_SIZE
24
25
26
27
28#define KERN_VIRT_START ASM_CONST(0x8000000000000000)
29#define KERN_VIRT_SIZE ASM_CONST(0x0000100000000000)
30
31
32
33
34
35
36#define VMALLOC_START KERN_VIRT_START
37#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2)
38#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
39
40
41
42
43
44
45
46
47
48
49#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
50#define FULL_IO_SIZE 0x80000000ul
51#define ISA_IO_BASE (KERN_IO_START)
52#define ISA_IO_END (KERN_IO_START + 0x10000ul)
53#define PHB_IO_BASE (ISA_IO_END)
54#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
55#define IOREMAP_BASE (PHB_IO_END)
56#define IOREMAP_START (ioremap_bot)
57#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE - FIXADDR_SIZE)
58#define FIXADDR_SIZE SZ_32M
59
60
61
62
63
64#define REGION_SHIFT 60UL
65#define REGION_MASK (0xfUL << REGION_SHIFT)
66#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
67
68#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START))
69#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
70#define USER_REGION_ID (0UL)
71
72
73
74
75
76#define VMEMMAP_BASE VMALLOC_END
77#define VMEMMAP_END KERN_IO_START
78#define vmemmap ((struct page *)VMEMMAP_BASE)
79
80
81
82
83
84#include <asm/nohash/pte-book3e.h>
85
86#define _PAGE_SAO 0
87
88#define PTE_RPN_MASK (~((1UL << PTE_RPN_SHIFT) - 1))
89
90
91
92
93
94#define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_SPECIAL)
95
96#define H_PAGE_4K_PFN 0
97
98#ifndef __ASSEMBLY__
99
100
101static inline pte_t pte_mkwrite(pte_t pte)
102{
103 return __pte(pte_val(pte) | _PAGE_RW);
104}
105
106static inline pte_t pte_mkdirty(pte_t pte)
107{
108 return __pte(pte_val(pte) | _PAGE_DIRTY);
109}
110
111static inline pte_t pte_mkyoung(pte_t pte)
112{
113 return __pte(pte_val(pte) | _PAGE_ACCESSED);
114}
115
116static inline pte_t pte_wrprotect(pte_t pte)
117{
118 return __pte(pte_val(pte) & ~_PAGE_RW);
119}
120
121#define PMD_BAD_BITS (PTE_TABLE_SIZE-1)
122#define PUD_BAD_BITS (PMD_TABLE_SIZE-1)
123
124static inline void pmd_set(pmd_t *pmdp, unsigned long val)
125{
126 *pmdp = __pmd(val);
127}
128
129static inline void pmd_clear(pmd_t *pmdp)
130{
131 *pmdp = __pmd(0);
132}
133
134static inline pte_t pmd_pte(pmd_t pmd)
135{
136 return __pte(pmd_val(pmd));
137}
138
139#define pmd_none(pmd) (!pmd_val(pmd))
140#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \
141 || (pmd_val(pmd) & PMD_BAD_BITS))
142#define pmd_present(pmd) (!pmd_none(pmd))
143#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS)
144extern struct page *pmd_page(pmd_t pmd);
145
146static inline void pud_set(pud_t *pudp, unsigned long val)
147{
148 *pudp = __pud(val);
149}
150
151static inline void pud_clear(pud_t *pudp)
152{
153 *pudp = __pud(0);
154}
155
156#define pud_none(pud) (!pud_val(pud))
157#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \
158 || (pud_val(pud) & PUD_BAD_BITS))
159#define pud_present(pud) (pud_val(pud) != 0)
160
161static inline pmd_t *pud_pgtable(pud_t pud)
162{
163 return (pmd_t *)(pud_val(pud) & ~PUD_MASKED_BITS);
164}
165
166extern struct page *pud_page(pud_t pud);
167
168static inline pte_t pud_pte(pud_t pud)
169{
170 return __pte(pud_val(pud));
171}
172
173static inline pud_t pte_pud(pte_t pte)
174{
175 return __pud(pte_val(pte));
176}
177#define pud_write(pud) pte_write(pud_pte(pud))
178#define p4d_write(pgd) pte_write(p4d_pte(p4d))
179
180static inline void p4d_set(p4d_t *p4dp, unsigned long val)
181{
182 *p4dp = __p4d(val);
183}
184
185
186static inline unsigned long pte_update(struct mm_struct *mm,
187 unsigned long addr,
188 pte_t *ptep, unsigned long clr,
189 unsigned long set,
190 int huge)
191{
192 unsigned long old = pte_val(*ptep);
193 *ptep = __pte((old & ~clr) | set);
194
195
196 if (!huge)
197 assert_pte_locked(mm, addr);
198
199 return old;
200}
201
202static inline int pte_young(pte_t pte)
203{
204 return pte_val(pte) & _PAGE_ACCESSED;
205}
206
207static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
208 unsigned long addr, pte_t *ptep)
209{
210 unsigned long old;
211
212 if (pte_young(*ptep))
213 return 0;
214 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
215 return (old & _PAGE_ACCESSED) != 0;
216}
217#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
218#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
219({ \
220 int __r; \
221 __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
222 __r; \
223})
224
225#define __HAVE_ARCH_PTEP_SET_WRPROTECT
226static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
227 pte_t *ptep)
228{
229
230 if ((pte_val(*ptep) & _PAGE_RW) == 0)
231 return;
232
233 pte_update(mm, addr, ptep, _PAGE_RW, 0, 0);
234}
235
236#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
237static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
238 unsigned long addr, pte_t *ptep)
239{
240 if ((pte_val(*ptep) & _PAGE_RW) == 0)
241 return;
242
243 pte_update(mm, addr, ptep, _PAGE_RW, 0, 1);
244}
245
246#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
247#define ptep_clear_flush_young(__vma, __address, __ptep) \
248({ \
249 int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \
250 __ptep); \
251 __young; \
252})
253
254#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
255static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
256 unsigned long addr, pte_t *ptep)
257{
258 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
259 return __pte(old);
260}
261
262static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
263 pte_t * ptep)
264{
265 pte_update(mm, addr, ptep, ~0UL, 0, 0);
266}
267
268
269
270static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
271 pte_t *ptep, pte_t entry,
272 unsigned long address,
273 int psize)
274{
275 unsigned long bits = pte_val(entry) &
276 (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
277
278 unsigned long old = pte_val(*ptep);
279 *ptep = __pte(old | bits);
280
281 flush_tlb_page(vma, address);
282}
283
284#define __HAVE_ARCH_PTE_SAME
285#define pte_same(A,B) ((pte_val(A) ^ pte_val(B)) == 0)
286
287#define pte_ERROR(e) \
288 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
289#define pmd_ERROR(e) \
290 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
291#define pgd_ERROR(e) \
292 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
293
294
295#define MAX_SWAPFILES_CHECK() do { \
296 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
297 } while (0)
298
299#define SWP_TYPE_BITS 5
300#define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
301 & ((1UL << SWP_TYPE_BITS) - 1))
302#define __swp_offset(x) ((x).val >> PTE_RPN_SHIFT)
303#define __swp_entry(type, offset) ((swp_entry_t) { \
304 ((type) << _PAGE_BIT_SWAP_TYPE) \
305 | ((offset) << PTE_RPN_SHIFT) })
306
307#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) })
308#define __swp_entry_to_pte(x) __pte((x).val)
309
310int map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot);
311extern int __meminit vmemmap_create_mapping(unsigned long start,
312 unsigned long page_size,
313 unsigned long phys);
314extern void vmemmap_remove_mapping(unsigned long start,
315 unsigned long page_size);
316#endif
317
318#endif
319