1#ifndef _ASM_POWERPC_PGTABLE_PPC64_H_
2#define _ASM_POWERPC_PGTABLE_PPC64_H_
3
4
5
6
7
8#ifdef CONFIG_PPC_64K_PAGES
9#include <asm/pgtable-ppc64-64k.h>
10#else
11#include <asm/pgtable-ppc64-4k.h>
12#endif
13
14#define FIRST_USER_ADDRESS 0
15
16
17
18
19#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \
20 PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT)
21#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE)
22
23
24
25#if TASK_SIZE_USER64 > PGTABLE_RANGE
26#error TASK_SIZE_USER64 exceeds pagetable range
27#endif
28
29#ifdef CONFIG_PPC_STD_MMU_64
30#if TASK_SIZE_USER64 > (1UL << (USER_ESID_BITS + SID_SHIFT))
31#error TASK_SIZE_USER64 exceeds user VSID range
32#endif
33#endif
34
35
36
37
38
39#ifdef CONFIG_PPC_BOOK3E
40#define KERN_VIRT_START ASM_CONST(0x8000000000000000)
41#else
42#define KERN_VIRT_START ASM_CONST(0xD000000000000000)
43#endif
44#define KERN_VIRT_SIZE PGTABLE_RANGE
45
46
47
48
49
50
51#define VMALLOC_START KERN_VIRT_START
52#ifdef CONFIG_PPC_BOOK3E
53#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2)
54#else
55#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1)
56#endif
57#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
58
59
60
61
62
63
64
65
66
67
68#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
69#define FULL_IO_SIZE 0x80000000ul
70#define ISA_IO_BASE (KERN_IO_START)
71#define ISA_IO_END (KERN_IO_START + 0x10000ul)
72#define PHB_IO_BASE (ISA_IO_END)
73#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
74#define IOREMAP_BASE (PHB_IO_END)
75#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
76
77
78
79
80
81#define REGION_SHIFT 60UL
82#define REGION_MASK (0xfUL << REGION_SHIFT)
83#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
84
85#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START))
86#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
87#define VMEMMAP_REGION_ID (0xfUL)
88#define USER_REGION_ID (0UL)
89
90
91
92
93
94#ifdef CONFIG_PPC_BOOK3E
95#define VMEMMAP_BASE VMALLOC_END
96#define VMEMMAP_END KERN_IO_START
97#else
98#define VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT)
99#endif
100#define vmemmap ((struct page *)VMEMMAP_BASE)
101
102
103
104
105
106#ifdef CONFIG_PPC_BOOK3S
107#include <asm/pte-hash64.h>
108#else
109#include <asm/pte-book3e.h>
110#endif
111#include <asm/pte-common.h>
112
113#ifdef CONFIG_PPC_MM_SLICES
114#define HAVE_ARCH_UNMAPPED_AREA
115#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
116#endif
117
118#ifndef __ASSEMBLY__
119
120#include <linux/stddef.h>
121#include <asm/tlbflush.h>
122
123
124
125
126
127
128#ifndef __real_pte
129
130#ifdef STRICT_MM_TYPECHECKS
131#define __real_pte(e,p) ((real_pte_t){(e)})
132#define __rpte_to_pte(r) ((r).pte)
133#else
134#define __real_pte(e,p) (e)
135#define __rpte_to_pte(r) (__pte(r))
136#endif
137#define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >> 12)
138
139#define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \
140 do { \
141 index = 0; \
142 shift = mmu_psize_defs[psize].shift; \
143
144#define pte_iterate_hashed_end() } while(0)
145
146#ifdef CONFIG_PPC_HAS_HASH_64K
147#define pte_pagesize_index(mm, addr, pte) get_slice_psize(mm, addr)
148#else
149#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K
150#endif
151
152#endif
153
154
155
156
157#define PMD_BAD_BITS (PTE_TABLE_SIZE-1)
158#define PUD_BAD_BITS (PMD_TABLE_SIZE-1)
159
160#define pmd_set(pmdp, pmdval) (pmd_val(*(pmdp)) = (pmdval))
161#define pmd_none(pmd) (!pmd_val(pmd))
162#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \
163 || (pmd_val(pmd) & PMD_BAD_BITS))
164#define pmd_present(pmd) (pmd_val(pmd) != 0)
165#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0)
166#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS)
167#define pmd_page(pmd) virt_to_page(pmd_page_vaddr(pmd))
168
169#define pud_set(pudp, pudval) (pud_val(*(pudp)) = (pudval))
170#define pud_none(pud) (!pud_val(pud))
171#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \
172 || (pud_val(pud) & PUD_BAD_BITS))
173#define pud_present(pud) (pud_val(pud) != 0)
174#define pud_clear(pudp) (pud_val(*(pudp)) = 0)
175#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS)
176#define pud_page(pud) virt_to_page(pud_page_vaddr(pud))
177
178#define pgd_set(pgdp, pudp) ({pgd_val(*(pgdp)) = (unsigned long)(pudp);})
179
180
181
182
183
184
185#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & 0x1ff)
186
187#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
188
189#define pmd_offset(pudp,addr) \
190 (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
191
192#define pte_offset_kernel(dir,addr) \
193 (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
194
195#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
196#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr))
197#define pte_unmap(pte) do { } while(0)
198#define pte_unmap_nested(pte) do { } while(0)
199
200
201
202#define pgd_offset_k(address) pgd_offset(&init_mm, address)
203
204
205
206static inline unsigned long pte_update(struct mm_struct *mm,
207 unsigned long addr,
208 pte_t *ptep, unsigned long clr,
209 int huge)
210{
211#ifdef PTE_ATOMIC_UPDATES
212 unsigned long old, tmp;
213
214 __asm__ __volatile__(
215 "1: ldarx %0,0,%3 # pte_update\n\
216 andi. %1,%0,%6\n\
217 bne- 1b \n\
218 andc %1,%0,%4 \n\
219 stdcx. %1,0,%3 \n\
220 bne- 1b"
221 : "=&r" (old), "=&r" (tmp), "=m" (*ptep)
222 : "r" (ptep), "r" (clr), "m" (*ptep), "i" (_PAGE_BUSY)
223 : "cc" );
224#else
225 unsigned long old = pte_val(*ptep);
226 *ptep = __pte(old & ~clr);
227#endif
228
229 if (!huge)
230 assert_pte_locked(mm, addr);
231
232#ifdef CONFIG_PPC_STD_MMU_64
233 if (old & _PAGE_HASHPTE)
234 hpte_need_flush(mm, addr, ptep, old, huge);
235#endif
236
237 return old;
238}
239
240static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
241 unsigned long addr, pte_t *ptep)
242{
243 unsigned long old;
244
245 if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0)
246 return 0;
247 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0);
248 return (old & _PAGE_ACCESSED) != 0;
249}
250#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
251#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
252({ \
253 int __r; \
254 __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
255 __r; \
256})
257
258#define __HAVE_ARCH_PTEP_SET_WRPROTECT
259static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
260 pte_t *ptep)
261{
262 unsigned long old;
263
264 if ((pte_val(*ptep) & _PAGE_RW) == 0)
265 return;
266 old = pte_update(mm, addr, ptep, _PAGE_RW, 0);
267}
268
269static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
270 unsigned long addr, pte_t *ptep)
271{
272 unsigned long old;
273
274 if ((pte_val(*ptep) & _PAGE_RW) == 0)
275 return;
276 old = pte_update(mm, addr, ptep, _PAGE_RW, 1);
277}
278
279
280
281
282
283
284
285
286
287#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
288#define ptep_clear_flush_young(__vma, __address, __ptep) \
289({ \
290 int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \
291 __ptep); \
292 __young; \
293})
294
295#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
296static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
297 unsigned long addr, pte_t *ptep)
298{
299 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0);
300 return __pte(old);
301}
302
303static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
304 pte_t * ptep)
305{
306 pte_update(mm, addr, ptep, ~0UL, 0);
307}
308
309
310
311
312
313static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry)
314{
315 unsigned long bits = pte_val(entry) &
316 (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
317
318#ifdef PTE_ATOMIC_UPDATES
319 unsigned long old, tmp;
320
321 __asm__ __volatile__(
322 "1: ldarx %0,0,%4\n\
323 andi. %1,%0,%6\n\
324 bne- 1b \n\
325 or %0,%3,%0\n\
326 stdcx. %0,0,%4\n\
327 bne- 1b"
328 :"=&r" (old), "=&r" (tmp), "=m" (*ptep)
329 :"r" (bits), "r" (ptep), "m" (*ptep), "i" (_PAGE_BUSY)
330 :"cc");
331#else
332 unsigned long old = pte_val(*ptep);
333 *ptep = __pte(old | bits);
334#endif
335}
336
337#define __HAVE_ARCH_PTE_SAME
338#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0)
339
340#define pte_ERROR(e) \
341 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
342#define pmd_ERROR(e) \
343 printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
344#define pgd_ERROR(e) \
345 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
346
347
348#define __swp_type(entry) (((entry).val >> 1) & 0x3f)
349#define __swp_offset(entry) ((entry).val >> 8)
350#define __swp_entry(type, offset) ((swp_entry_t){((type)<< 1)|((offset)<<8)})
351#define __pte_to_swp_entry(pte) ((swp_entry_t){pte_val(pte) >> PTE_RPN_SHIFT})
352#define __swp_entry_to_pte(x) ((pte_t) { (x).val << PTE_RPN_SHIFT })
353#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_RPN_SHIFT)
354#define pgoff_to_pte(off) ((pte_t) {((off) << PTE_RPN_SHIFT)|_PAGE_FILE})
355#define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_RPN_SHIFT)
356
357void pgtable_cache_init(void);
358
359
360
361
362static inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea)
363{
364 pgd_t *pg;
365 pud_t *pu;
366 pmd_t *pm;
367 pte_t *pt = NULL;
368
369 pg = pgdir + pgd_index(ea);
370 if (!pgd_none(*pg)) {
371 pu = pud_offset(pg, ea);
372 if (!pud_none(*pu)) {
373 pm = pmd_offset(pu, ea);
374 if (pmd_present(*pm))
375 pt = pte_offset_kernel(pm, ea);
376 }
377 }
378 return pt;
379}
380
381pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long address);
382
383#endif
384
385#endif
386