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
12#ifdef CONFIG_PPC_64K_PAGES
13#error "Page size not supported"
14#endif
15
16#define FIRST_USER_ADDRESS 0UL
17
18
19
20
21#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \
22 PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT)
23#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE)
24
25#ifdef CONFIG_TRANSPARENT_HUGEPAGE
26#define PMD_CACHE_INDEX (PMD_INDEX_SIZE + 1)
27#else
28#define PMD_CACHE_INDEX PMD_INDEX_SIZE
29#endif
30#define PUD_CACHE_INDEX PUD_INDEX_SIZE
31
32
33
34
35#define KERN_VIRT_START ASM_CONST(0x8000000000000000)
36#define KERN_VIRT_SIZE ASM_CONST(0x0000100000000000)
37
38
39
40
41
42
43#define VMALLOC_START KERN_VIRT_START
44#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2)
45#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
46
47
48
49
50
51
52
53
54
55
56#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
57#define FULL_IO_SIZE 0x80000000ul
58#define ISA_IO_BASE (KERN_IO_START)
59#define ISA_IO_END (KERN_IO_START + 0x10000ul)
60#define PHB_IO_BASE (ISA_IO_END)
61#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
62#define IOREMAP_BASE (PHB_IO_END)
63#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
64
65
66
67
68
69#define REGION_SHIFT 60UL
70#define REGION_MASK (0xfUL << REGION_SHIFT)
71#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
72
73#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START))
74#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
75#define VMEMMAP_REGION_ID (0xfUL)
76#define USER_REGION_ID (0UL)
77
78
79
80
81
82#define VMEMMAP_BASE VMALLOC_END
83#define VMEMMAP_END KERN_IO_START
84#define vmemmap ((struct page *)VMEMMAP_BASE)
85
86
87
88
89
90#include <asm/nohash/pte-book3e.h>
91#include <asm/pte-common.h>
92
93#ifndef __ASSEMBLY__
94
95
96#define PMD_BAD_BITS (PTE_TABLE_SIZE-1)
97#define PUD_BAD_BITS (PMD_TABLE_SIZE-1)
98
99static inline void pmd_set(pmd_t *pmdp, unsigned long val)
100{
101 *pmdp = __pmd(val);
102}
103
104static inline void pmd_clear(pmd_t *pmdp)
105{
106 *pmdp = __pmd(0);
107}
108
109static inline pte_t pmd_pte(pmd_t pmd)
110{
111 return __pte(pmd_val(pmd));
112}
113
114#define pmd_none(pmd) (!pmd_val(pmd))
115#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \
116 || (pmd_val(pmd) & PMD_BAD_BITS))
117#define pmd_present(pmd) (!pmd_none(pmd))
118#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS)
119extern struct page *pmd_page(pmd_t pmd);
120
121static inline void pud_set(pud_t *pudp, unsigned long val)
122{
123 *pudp = __pud(val);
124}
125
126static inline void pud_clear(pud_t *pudp)
127{
128 *pudp = __pud(0);
129}
130
131#define pud_none(pud) (!pud_val(pud))
132#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \
133 || (pud_val(pud) & PUD_BAD_BITS))
134#define pud_present(pud) (pud_val(pud) != 0)
135#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS)
136
137extern struct page *pud_page(pud_t pud);
138
139static inline pte_t pud_pte(pud_t pud)
140{
141 return __pte(pud_val(pud));
142}
143
144static inline pud_t pte_pud(pte_t pte)
145{
146 return __pud(pte_val(pte));
147}
148#define pud_write(pud) pte_write(pud_pte(pud))
149#define pgd_write(pgd) pte_write(pgd_pte(pgd))
150
151static inline void pgd_set(pgd_t *pgdp, unsigned long val)
152{
153 *pgdp = __pgd(val);
154}
155
156
157
158
159
160#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1))
161
162#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
163
164#define pmd_offset(pudp,addr) \
165 (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
166
167#define pte_offset_kernel(dir,addr) \
168 (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
169
170#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
171#define pte_unmap(pte) do { } while(0)
172
173
174
175#define pgd_offset_k(address) pgd_offset(&init_mm, address)
176
177
178static inline unsigned long pte_update(struct mm_struct *mm,
179 unsigned long addr,
180 pte_t *ptep, unsigned long clr,
181 unsigned long set,
182 int huge)
183{
184#ifdef PTE_ATOMIC_UPDATES
185 unsigned long old, tmp;
186
187 __asm__ __volatile__(
188 "1: ldarx %0,0,%3 # pte_update\n\
189 andc %1,%0,%4 \n\
190 or %1,%1,%6\n\
191 stdcx. %1,0,%3 \n\
192 bne- 1b"
193 : "=&r" (old), "=&r" (tmp), "=m" (*ptep)
194 : "r" (ptep), "r" (clr), "m" (*ptep), "r" (set)
195 : "cc" );
196#else
197 unsigned long old = pte_val(*ptep);
198 *ptep = __pte((old & ~clr) | set);
199#endif
200
201 if (!huge)
202 assert_pte_locked(mm, addr);
203
204 return old;
205}
206
207static inline int pte_young(pte_t pte)
208{
209 return pte_val(pte) & _PAGE_ACCESSED;
210}
211
212static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
213 unsigned long addr, pte_t *ptep)
214{
215 unsigned long old;
216
217 if (pte_young(*ptep))
218 return 0;
219 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
220 return (old & _PAGE_ACCESSED) != 0;
221}
222#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
223#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
224({ \
225 int __r; \
226 __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
227 __r; \
228})
229
230#define __HAVE_ARCH_PTEP_SET_WRPROTECT
231static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
232 pte_t *ptep)
233{
234
235 if ((pte_val(*ptep) & _PAGE_RW) == 0)
236 return;
237
238 pte_update(mm, addr, ptep, _PAGE_RW, 0, 0);
239}
240
241static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
242 unsigned long addr, pte_t *ptep)
243{
244 if ((pte_val(*ptep) & _PAGE_RW) == 0)
245 return;
246
247 pte_update(mm, addr, ptep, _PAGE_RW, 0, 1);
248}
249
250
251
252
253
254
255
256
257
258#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
259#define ptep_clear_flush_young(__vma, __address, __ptep) \
260({ \
261 int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \
262 __ptep); \
263 __young; \
264})
265
266#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
267static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
268 unsigned long addr, pte_t *ptep)
269{
270 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
271 return __pte(old);
272}
273
274static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
275 pte_t * ptep)
276{
277 pte_update(mm, addr, ptep, ~0UL, 0, 0);
278}
279
280
281
282
283
284static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
285 pte_t *ptep, pte_t entry,
286 unsigned long address,
287 int psize)
288{
289 unsigned long bits = pte_val(entry) &
290 (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
291
292#ifdef PTE_ATOMIC_UPDATES
293 unsigned long old, tmp;
294
295 __asm__ __volatile__(
296 "1: ldarx %0,0,%4\n\
297 or %0,%3,%0\n\
298 stdcx. %0,0,%4\n\
299 bne- 1b"
300 :"=&r" (old), "=&r" (tmp), "=m" (*ptep)
301 :"r" (bits), "r" (ptep), "m" (*ptep)
302 :"cc");
303#else
304 unsigned long old = pte_val(*ptep);
305 *ptep = __pte(old | bits);
306#endif
307
308 flush_tlb_page(vma, address);
309}
310
311#define __HAVE_ARCH_PTE_SAME
312#define pte_same(A,B) ((pte_val(A) ^ pte_val(B)) == 0)
313
314#define pte_ERROR(e) \
315 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
316#define pmd_ERROR(e) \
317 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
318#define pgd_ERROR(e) \
319 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
320
321
322#define MAX_SWAPFILES_CHECK() do { \
323 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
324 } while (0)
325
326#define SWP_TYPE_BITS 5
327#define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
328 & ((1UL << SWP_TYPE_BITS) - 1))
329#define __swp_offset(x) ((x).val >> PTE_RPN_SHIFT)
330#define __swp_entry(type, offset) ((swp_entry_t) { \
331 ((type) << _PAGE_BIT_SWAP_TYPE) \
332 | ((offset) << PTE_RPN_SHIFT) })
333
334#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) })
335#define __swp_entry_to_pte(x) __pte((x).val)
336
337int map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot);
338extern int __meminit vmemmap_create_mapping(unsigned long start,
339 unsigned long page_size,
340 unsigned long phys);
341extern void vmemmap_remove_mapping(unsigned long start,
342 unsigned long page_size);
343#endif
344
345#endif
346