1#ifndef _ASM_POWERPC_NOHASH_64_PGTABLE_H
2#define _ASM_POWERPC_NOHASH_64_PGTABLE_H
3
4
5
6
7
8#ifdef CONFIG_PPC_64K_PAGES
9#include <asm/nohash/64/pgtable-64k.h>
10#else
11#include <asm/nohash/64/pgtable-4k.h>
12#endif
13#include <asm/barrier.h>
14
15#define FIRST_USER_ADDRESS 0UL
16
17
18
19
20#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \
21 PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT)
22#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE)
23
24#ifdef CONFIG_TRANSPARENT_HUGEPAGE
25#define PMD_CACHE_INDEX (PMD_INDEX_SIZE + 1)
26#else
27#define PMD_CACHE_INDEX PMD_INDEX_SIZE
28#endif
29
30
31
32
33#ifdef CONFIG_PPC_BOOK3E
34#define KERN_VIRT_START ASM_CONST(0x8000000000000000)
35#else
36#define KERN_VIRT_START ASM_CONST(0xD000000000000000)
37#endif
38#define KERN_VIRT_SIZE ASM_CONST(0x0000100000000000)
39
40
41
42
43
44
45#define VMALLOC_START KERN_VIRT_START
46#ifdef CONFIG_PPC_BOOK3E
47#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2)
48#else
49#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1)
50#endif
51#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
52
53
54
55
56
57
58
59
60
61
62#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
63#define FULL_IO_SIZE 0x80000000ul
64#define ISA_IO_BASE (KERN_IO_START)
65#define ISA_IO_END (KERN_IO_START + 0x10000ul)
66#define PHB_IO_BASE (ISA_IO_END)
67#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
68#define IOREMAP_BASE (PHB_IO_END)
69#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
70
71
72
73
74
75#define REGION_SHIFT 60UL
76#define REGION_MASK (0xfUL << REGION_SHIFT)
77#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
78
79#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START))
80#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
81#define VMEMMAP_REGION_ID (0xfUL)
82#define USER_REGION_ID (0UL)
83
84
85
86
87
88#ifdef CONFIG_PPC_BOOK3E
89#define VMEMMAP_BASE VMALLOC_END
90#define VMEMMAP_END KERN_IO_START
91#else
92#define VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT)
93#endif
94#define vmemmap ((struct page *)VMEMMAP_BASE)
95
96
97
98
99
100#include <asm/nohash/pte-book3e.h>
101#include <asm/pte-common.h>
102
103#ifdef CONFIG_PPC_MM_SLICES
104#define HAVE_ARCH_UNMAPPED_AREA
105#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
106#endif
107
108#ifndef __ASSEMBLY__
109
110
111#define PMD_BAD_BITS (PTE_TABLE_SIZE-1)
112#define PUD_BAD_BITS (PMD_TABLE_SIZE-1)
113
114static inline void pmd_set(pmd_t *pmdp, unsigned long val)
115{
116 *pmdp = __pmd(val);
117}
118
119static inline void pmd_clear(pmd_t *pmdp)
120{
121 *pmdp = __pmd(0);
122}
123
124static inline pte_t pmd_pte(pmd_t pmd)
125{
126 return __pte(pmd_val(pmd));
127}
128
129#define pmd_none(pmd) (!pmd_val(pmd))
130#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \
131 || (pmd_val(pmd) & PMD_BAD_BITS))
132#define pmd_present(pmd) (!pmd_none(pmd))
133#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS)
134extern struct page *pmd_page(pmd_t pmd);
135
136static inline void pud_set(pud_t *pudp, unsigned long val)
137{
138 *pudp = __pud(val);
139}
140
141static inline void pud_clear(pud_t *pudp)
142{
143 *pudp = __pud(0);
144}
145
146#define pud_none(pud) (!pud_val(pud))
147#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \
148 || (pud_val(pud) & PUD_BAD_BITS))
149#define pud_present(pud) (pud_val(pud) != 0)
150#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS)
151
152extern struct page *pud_page(pud_t pud);
153
154static inline pte_t pud_pte(pud_t pud)
155{
156 return __pte(pud_val(pud));
157}
158
159static inline pud_t pte_pud(pte_t pte)
160{
161 return __pud(pte_val(pte));
162}
163#define pud_write(pud) pte_write(pud_pte(pud))
164#define pgd_write(pgd) pte_write(pgd_pte(pgd))
165
166static inline void pgd_set(pgd_t *pgdp, unsigned long val)
167{
168 *pgdp = __pgd(val);
169}
170
171
172
173
174
175#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1))
176
177#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
178
179#define pmd_offset(pudp,addr) \
180 (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
181
182#define pte_offset_kernel(dir,addr) \
183 (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
184
185#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
186#define pte_unmap(pte) do { } while(0)
187
188
189
190#define pgd_offset_k(address) pgd_offset(&init_mm, address)
191extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
192 pte_t *ptep, unsigned long pte, int huge);
193
194
195static inline unsigned long pte_update(struct mm_struct *mm,
196 unsigned long addr,
197 pte_t *ptep, unsigned long clr,
198 unsigned long set,
199 int huge)
200{
201#ifdef PTE_ATOMIC_UPDATES
202 unsigned long old, tmp;
203
204 __asm__ __volatile__(
205 "1: ldarx %0,0,%3 # pte_update\n\
206 andi. %1,%0,%6\n\
207 bne- 1b \n\
208 andc %1,%0,%4 \n\
209 or %1,%1,%7\n\
210 stdcx. %1,0,%3 \n\
211 bne- 1b"
212 : "=&r" (old), "=&r" (tmp), "=m" (*ptep)
213 : "r" (ptep), "r" (clr), "m" (*ptep), "i" (_PAGE_BUSY), "r" (set)
214 : "cc" );
215#else
216 unsigned long old = pte_val(*ptep);
217 *ptep = __pte((old & ~clr) | set);
218#endif
219
220 if (!huge)
221 assert_pte_locked(mm, addr);
222
223#ifdef CONFIG_PPC_STD_MMU_64
224 if (old & _PAGE_HASHPTE)
225 hpte_need_flush(mm, addr, ptep, old, huge);
226#endif
227
228 return old;
229}
230
231static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
232 unsigned long addr, pte_t *ptep)
233{
234 unsigned long old;
235
236 if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0)
237 return 0;
238 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
239 return (old & _PAGE_ACCESSED) != 0;
240}
241#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
242#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
243({ \
244 int __r; \
245 __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
246 __r; \
247})
248
249#define __HAVE_ARCH_PTEP_SET_WRPROTECT
250static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
251 pte_t *ptep)
252{
253
254 if ((pte_val(*ptep) & _PAGE_RW) == 0)
255 return;
256
257 pte_update(mm, addr, ptep, _PAGE_RW, 0, 0);
258}
259
260static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
261 unsigned long addr, pte_t *ptep)
262{
263 if ((pte_val(*ptep) & _PAGE_RW) == 0)
264 return;
265
266 pte_update(mm, addr, ptep, _PAGE_RW, 0, 1);
267}
268
269
270
271
272
273
274
275
276
277#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
278#define ptep_clear_flush_young(__vma, __address, __ptep) \
279({ \
280 int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \
281 __ptep); \
282 __young; \
283})
284
285#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
286static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
287 unsigned long addr, pte_t *ptep)
288{
289 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
290 return __pte(old);
291}
292
293static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
294 pte_t * ptep)
295{
296 pte_update(mm, addr, ptep, ~0UL, 0, 0);
297}
298
299
300
301
302
303static inline void __ptep_set_access_flags(struct mm_struct *mm,
304 pte_t *ptep, pte_t entry)
305{
306 unsigned long bits = pte_val(entry) &
307 (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
308
309#ifdef PTE_ATOMIC_UPDATES
310 unsigned long old, tmp;
311
312 __asm__ __volatile__(
313 "1: ldarx %0,0,%4\n\
314 andi. %1,%0,%6\n\
315 bne- 1b \n\
316 or %0,%3,%0\n\
317 stdcx. %0,0,%4\n\
318 bne- 1b"
319 :"=&r" (old), "=&r" (tmp), "=m" (*ptep)
320 :"r" (bits), "r" (ptep), "m" (*ptep), "i" (_PAGE_BUSY)
321 :"cc");
322#else
323 unsigned long old = pte_val(*ptep);
324 *ptep = __pte(old | bits);
325#endif
326}
327
328#define __HAVE_ARCH_PTE_SAME
329#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0)
330
331#define pte_ERROR(e) \
332 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
333#define pmd_ERROR(e) \
334 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
335#define pgd_ERROR(e) \
336 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
337
338
339#define MAX_SWAPFILES_CHECK() do { \
340 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
341
342
343
344 \
345 BUILD_BUG_ON(_PAGE_HPTEFLAGS & (0x1f << _PAGE_BIT_SWAP_TYPE)); \
346 } while (0)
347
348
349
350#define SWP_TYPE_BITS 5
351#define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
352 & ((1UL << SWP_TYPE_BITS) - 1))
353#define __swp_offset(x) ((x).val >> PTE_RPN_SHIFT)
354#define __swp_entry(type, offset) ((swp_entry_t) { \
355 ((type) << _PAGE_BIT_SWAP_TYPE) \
356 | ((offset) << PTE_RPN_SHIFT) })
357
358#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) })
359#define __swp_entry_to_pte(x) __pte((x).val)
360
361void pgtable_cache_add(unsigned shift, void (*ctor)(void *));
362void pgtable_cache_init(void);
363extern int map_kernel_page(unsigned long ea, unsigned long pa,
364 unsigned long flags);
365extern int __meminit vmemmap_create_mapping(unsigned long start,
366 unsigned long page_size,
367 unsigned long phys);
368extern void vmemmap_remove_mapping(unsigned long start,
369 unsigned long page_size);
370#endif
371
372#endif
373