1
2#ifndef _ASM_POWERPC_NOHASH_64_PGTABLE_H
3#define _ASM_POWERPC_NOHASH_64_PGTABLE_H
4
5
6
7
8
9#include <asm/nohash/64/pgtable-4k.h>
10#include <asm/barrier.h>
11#include <asm/asm-const.h>
12
13#ifdef CONFIG_PPC_64K_PAGES
14#error "Page size not supported"
15#endif
16
17#define FIRST_USER_ADDRESS 0UL
18
19
20
21
22#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \
23 PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT)
24#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE)
25
26#ifdef CONFIG_TRANSPARENT_HUGEPAGE
27#define PMD_CACHE_INDEX (PMD_INDEX_SIZE + 1)
28#else
29#define PMD_CACHE_INDEX PMD_INDEX_SIZE
30#endif
31#define PUD_CACHE_INDEX PUD_INDEX_SIZE
32
33
34
35
36#define KERN_VIRT_START ASM_CONST(0x8000000000000000)
37#define KERN_VIRT_SIZE ASM_CONST(0x0000100000000000)
38
39
40
41
42
43
44#define VMALLOC_START KERN_VIRT_START
45#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2)
46#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
47
48
49
50
51
52
53
54
55
56
57#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
58#define FULL_IO_SIZE 0x80000000ul
59#define ISA_IO_BASE (KERN_IO_START)
60#define ISA_IO_END (KERN_IO_START + 0x10000ul)
61#define PHB_IO_BASE (ISA_IO_END)
62#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
63#define IOREMAP_BASE (PHB_IO_END)
64#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
65
66
67
68
69
70#define REGION_SHIFT 60UL
71#define REGION_MASK (0xfUL << REGION_SHIFT)
72#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
73
74#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START))
75#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
76#define VMEMMAP_REGION_ID (0xfUL)
77#define USER_REGION_ID (0UL)
78
79
80
81
82
83#define VMEMMAP_BASE VMALLOC_END
84#define VMEMMAP_END KERN_IO_START
85#define vmemmap ((struct page *)VMEMMAP_BASE)
86
87
88
89
90
91#include <asm/nohash/pte-book3e.h>
92#include <asm/pte-common.h>
93
94#ifndef __ASSEMBLY__
95
96
97#define PMD_BAD_BITS (PTE_TABLE_SIZE-1)
98#define PUD_BAD_BITS (PMD_TABLE_SIZE-1)
99
100static inline void pmd_set(pmd_t *pmdp, unsigned long val)
101{
102 *pmdp = __pmd(val);
103}
104
105static inline void pmd_clear(pmd_t *pmdp)
106{
107 *pmdp = __pmd(0);
108}
109
110static inline pte_t pmd_pte(pmd_t pmd)
111{
112 return __pte(pmd_val(pmd));
113}
114
115#define pmd_none(pmd) (!pmd_val(pmd))
116#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \
117 || (pmd_val(pmd) & PMD_BAD_BITS))
118#define pmd_present(pmd) (!pmd_none(pmd))
119#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS)
120extern struct page *pmd_page(pmd_t pmd);
121
122static inline void pud_set(pud_t *pudp, unsigned long val)
123{
124 *pudp = __pud(val);
125}
126
127static inline void pud_clear(pud_t *pudp)
128{
129 *pudp = __pud(0);
130}
131
132#define pud_none(pud) (!pud_val(pud))
133#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \
134 || (pud_val(pud) & PUD_BAD_BITS))
135#define pud_present(pud) (pud_val(pud) != 0)
136#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS)
137
138extern struct page *pud_page(pud_t pud);
139
140static inline pte_t pud_pte(pud_t pud)
141{
142 return __pte(pud_val(pud));
143}
144
145static inline pud_t pte_pud(pte_t pte)
146{
147 return __pud(pte_val(pte));
148}
149#define pud_write(pud) pte_write(pud_pte(pud))
150#define pgd_write(pgd) pte_write(pgd_pte(pgd))
151
152static inline void pgd_set(pgd_t *pgdp, unsigned long val)
153{
154 *pgdp = __pgd(val);
155}
156
157
158
159
160
161#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1))
162
163#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
164
165#define pmd_offset(pudp,addr) \
166 (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
167
168#define pte_offset_kernel(dir,addr) \
169 (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
170
171#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
172#define pte_unmap(pte) do { } while(0)
173
174
175
176#define pgd_offset_k(address) pgd_offset(&init_mm, address)
177
178
179static inline unsigned long pte_update(struct mm_struct *mm,
180 unsigned long addr,
181 pte_t *ptep, unsigned long clr,
182 unsigned long set,
183 int huge)
184{
185#ifdef PTE_ATOMIC_UPDATES
186 unsigned long old, tmp;
187
188 __asm__ __volatile__(
189 "1: ldarx %0,0,%3 # pte_update\n\
190 andc %1,%0,%4 \n\
191 or %1,%1,%6\n\
192 stdcx. %1,0,%3 \n\
193 bne- 1b"
194 : "=&r" (old), "=&r" (tmp), "=m" (*ptep)
195 : "r" (ptep), "r" (clr), "m" (*ptep), "r" (set)
196 : "cc" );
197#else
198 unsigned long old = pte_val(*ptep);
199 *ptep = __pte((old & ~clr) | set);
200#endif
201
202 if (!huge)
203 assert_pte_locked(mm, addr);
204
205 return old;
206}
207
208static inline int pte_young(pte_t pte)
209{
210 return pte_val(pte) & _PAGE_ACCESSED;
211}
212
213static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
214 unsigned long addr, pte_t *ptep)
215{
216 unsigned long old;
217
218 if (pte_young(*ptep))
219 return 0;
220 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
221 return (old & _PAGE_ACCESSED) != 0;
222}
223#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
224#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
225({ \
226 int __r; \
227 __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
228 __r; \
229})
230
231#define __HAVE_ARCH_PTEP_SET_WRPROTECT
232static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
233 pte_t *ptep)
234{
235
236 if ((pte_val(*ptep) & _PAGE_RW) == 0)
237 return;
238
239 pte_update(mm, addr, ptep, _PAGE_RW, 0, 0);
240}
241
242static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
243 unsigned long addr, pte_t *ptep)
244{
245 if ((pte_val(*ptep) & _PAGE_RW) == 0)
246 return;
247
248 pte_update(mm, addr, ptep, _PAGE_RW, 0, 1);
249}
250
251#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
252#define ptep_clear_flush_young(__vma, __address, __ptep) \
253({ \
254 int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \
255 __ptep); \
256 __young; \
257})
258
259#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
260static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
261 unsigned long addr, pte_t *ptep)
262{
263 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
264 return __pte(old);
265}
266
267static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
268 pte_t * ptep)
269{
270 pte_update(mm, addr, ptep, ~0UL, 0, 0);
271}
272
273
274
275static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
276 pte_t *ptep, pte_t entry,
277 unsigned long address,
278 int psize)
279{
280 unsigned long bits = pte_val(entry) &
281 (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
282
283#ifdef PTE_ATOMIC_UPDATES
284 unsigned long old, tmp;
285
286 __asm__ __volatile__(
287 "1: ldarx %0,0,%4\n\
288 or %0,%3,%0\n\
289 stdcx. %0,0,%4\n\
290 bne- 1b"
291 :"=&r" (old), "=&r" (tmp), "=m" (*ptep)
292 :"r" (bits), "r" (ptep), "m" (*ptep)
293 :"cc");
294#else
295 unsigned long old = pte_val(*ptep);
296 *ptep = __pte(old | bits);
297#endif
298
299 flush_tlb_page(vma, address);
300}
301
302#define __HAVE_ARCH_PTE_SAME
303#define pte_same(A,B) ((pte_val(A) ^ pte_val(B)) == 0)
304
305#define pte_ERROR(e) \
306 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
307#define pmd_ERROR(e) \
308 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
309#define pgd_ERROR(e) \
310 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
311
312
313#define MAX_SWAPFILES_CHECK() do { \
314 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
315 } while (0)
316
317
318
319#define SWP_TYPE_BITS 5
320#define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
321 & ((1UL << SWP_TYPE_BITS) - 1))
322#define __swp_offset(x) ((x).val >> PTE_RPN_SHIFT)
323#define __swp_entry(type, offset) ((swp_entry_t) { \
324 ((type) << _PAGE_BIT_SWAP_TYPE) \
325 | ((offset) << PTE_RPN_SHIFT) })
326
327#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) })
328#define __swp_entry_to_pte(x) __pte((x).val)
329
330extern int map_kernel_page(unsigned long ea, unsigned long pa,
331 unsigned long flags);
332extern int __meminit vmemmap_create_mapping(unsigned long start,
333 unsigned long page_size,
334 unsigned long phys);
335extern void vmemmap_remove_mapping(unsigned long start,
336 unsigned long page_size);
337#endif
338
339#endif
340