1
2#ifndef _ASM_POWERPC_PGTABLE_RADIX_H
3#define _ASM_POWERPC_PGTABLE_RADIX_H
4
5#include <asm/asm-const.h>
6
7#ifndef __ASSEMBLY__
8#include <asm/cmpxchg.h>
9#endif
10
11#ifdef CONFIG_PPC_64K_PAGES
12#include <asm/book3s/64/radix-64k.h>
13#else
14#include <asm/book3s/64/radix-4k.h>
15#endif
16
17#ifndef __ASSEMBLY__
18#include <asm/book3s/64/tlbflush-radix.h>
19#include <asm/cpu_has_feature.h>
20#endif
21
22
23#define RADIX_PTE_NONE_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
24
25
26#define RADIX_PMD_VAL_BITS (0x8000000000000000UL | RADIX_PTE_INDEX_SIZE)
27#define RADIX_PUD_VAL_BITS (0x8000000000000000UL | RADIX_PMD_INDEX_SIZE)
28#define RADIX_PGD_VAL_BITS (0x8000000000000000UL | RADIX_PUD_INDEX_SIZE)
29
30
31#define RADIX_PMD_BAD_BITS 0x60000000000000e0UL
32#define RADIX_PUD_BAD_BITS 0x60000000000000e0UL
33#define RADIX_P4D_BAD_BITS 0x60000000000000e0UL
34
35#define RADIX_PMD_SHIFT (PAGE_SHIFT + RADIX_PTE_INDEX_SIZE)
36#define RADIX_PUD_SHIFT (RADIX_PMD_SHIFT + RADIX_PMD_INDEX_SIZE)
37#define RADIX_PGD_SHIFT (RADIX_PUD_SHIFT + RADIX_PUD_INDEX_SIZE)
38
39
40
41#define RADIX_PGTABLE_EADDR_SIZE (RADIX_PTE_INDEX_SIZE + RADIX_PMD_INDEX_SIZE + \
42 RADIX_PUD_INDEX_SIZE + RADIX_PGD_INDEX_SIZE + PAGE_SHIFT)
43#define RADIX_PGTABLE_RANGE (ASM_CONST(1) << RADIX_PGTABLE_EADDR_SIZE)
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104#if defined(CONFIG_SPARSEMEM_VMEMMAP) && defined(CONFIG_SPARSEMEM_EXTREME)
105#define R_MAX_PHYSMEM_BITS 51
106#else
107#define R_MAX_PHYSMEM_BITS 46
108#endif
109
110#define RADIX_KERN_VIRT_START ASM_CONST(0xc008000000000000)
111
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114
115#define RADIX_KERN_MAP_SIZE (1UL << 49)
116
117#define RADIX_VMALLOC_START RADIX_KERN_VIRT_START
118#define RADIX_VMALLOC_SIZE RADIX_KERN_MAP_SIZE
119#define RADIX_VMALLOC_END (RADIX_VMALLOC_START + RADIX_VMALLOC_SIZE)
120
121#define RADIX_KERN_IO_START RADIX_VMALLOC_END
122#define RADIX_KERN_IO_SIZE RADIX_KERN_MAP_SIZE
123#define RADIX_KERN_IO_END (RADIX_KERN_IO_START + RADIX_KERN_IO_SIZE)
124
125#define RADIX_VMEMMAP_START RADIX_KERN_IO_END
126#define RADIX_VMEMMAP_SIZE RADIX_KERN_MAP_SIZE
127#define RADIX_VMEMMAP_END (RADIX_VMEMMAP_START + RADIX_VMEMMAP_SIZE)
128
129#ifndef __ASSEMBLY__
130#define RADIX_PTE_TABLE_SIZE (sizeof(pte_t) << RADIX_PTE_INDEX_SIZE)
131#define RADIX_PMD_TABLE_SIZE (sizeof(pmd_t) << RADIX_PMD_INDEX_SIZE)
132#define RADIX_PUD_TABLE_SIZE (sizeof(pud_t) << RADIX_PUD_INDEX_SIZE)
133#define RADIX_PGD_TABLE_SIZE (sizeof(pgd_t) << RADIX_PGD_INDEX_SIZE)
134
135#ifdef CONFIG_STRICT_KERNEL_RWX
136extern void radix__mark_rodata_ro(void);
137extern void radix__mark_initmem_nx(void);
138#endif
139
140extern void radix__ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep,
141 pte_t entry, unsigned long address,
142 int psize);
143
144extern void radix__ptep_modify_prot_commit(struct vm_area_struct *vma,
145 unsigned long addr, pte_t *ptep,
146 pte_t old_pte, pte_t pte);
147
148static inline unsigned long __radix_pte_update(pte_t *ptep, unsigned long clr,
149 unsigned long set)
150{
151 __be64 old_be, tmp_be;
152
153 __asm__ __volatile__(
154 "1: ldarx %0,0,%3 # pte_update\n"
155 " andc %1,%0,%5 \n"
156 " or %1,%1,%4 \n"
157 " stdcx. %1,0,%3 \n"
158 " bne- 1b"
159 : "=&r" (old_be), "=&r" (tmp_be), "=m" (*ptep)
160 : "r" (ptep), "r" (cpu_to_be64(set)), "r" (cpu_to_be64(clr))
161 : "cc" );
162
163 return be64_to_cpu(old_be);
164}
165
166static inline unsigned long radix__pte_update(struct mm_struct *mm,
167 unsigned long addr,
168 pte_t *ptep, unsigned long clr,
169 unsigned long set,
170 int huge)
171{
172 unsigned long old_pte;
173
174 old_pte = __radix_pte_update(ptep, clr, set);
175 if (!huge)
176 assert_pte_locked(mm, addr);
177
178 return old_pte;
179}
180
181static inline pte_t radix__ptep_get_and_clear_full(struct mm_struct *mm,
182 unsigned long addr,
183 pte_t *ptep, int full)
184{
185 unsigned long old_pte;
186
187 if (full) {
188 old_pte = pte_val(*ptep);
189 *ptep = __pte(0);
190 } else
191 old_pte = radix__pte_update(mm, addr, ptep, ~0ul, 0, 0);
192
193 return __pte(old_pte);
194}
195
196static inline int radix__pte_same(pte_t pte_a, pte_t pte_b)
197{
198 return ((pte_raw(pte_a) ^ pte_raw(pte_b)) == 0);
199}
200
201static inline int radix__pte_none(pte_t pte)
202{
203 return (pte_val(pte) & ~RADIX_PTE_NONE_MASK) == 0;
204}
205
206static inline void radix__set_pte_at(struct mm_struct *mm, unsigned long addr,
207 pte_t *ptep, pte_t pte, int percpu)
208{
209 *ptep = pte;
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230}
231
232static inline int radix__pmd_bad(pmd_t pmd)
233{
234 return !!(pmd_val(pmd) & RADIX_PMD_BAD_BITS);
235}
236
237static inline int radix__pmd_same(pmd_t pmd_a, pmd_t pmd_b)
238{
239 return ((pmd_raw(pmd_a) ^ pmd_raw(pmd_b)) == 0);
240}
241
242static inline int radix__pud_bad(pud_t pud)
243{
244 return !!(pud_val(pud) & RADIX_PUD_BAD_BITS);
245}
246
247
248static inline int radix__p4d_bad(p4d_t p4d)
249{
250 return !!(p4d_val(p4d) & RADIX_P4D_BAD_BITS);
251}
252
253#ifdef CONFIG_TRANSPARENT_HUGEPAGE
254
255static inline int radix__pmd_trans_huge(pmd_t pmd)
256{
257 return (pmd_val(pmd) & (_PAGE_PTE | _PAGE_DEVMAP)) == _PAGE_PTE;
258}
259
260static inline pmd_t radix__pmd_mkhuge(pmd_t pmd)
261{
262 return __pmd(pmd_val(pmd) | _PAGE_PTE);
263}
264
265extern unsigned long radix__pmd_hugepage_update(struct mm_struct *mm, unsigned long addr,
266 pmd_t *pmdp, unsigned long clr,
267 unsigned long set);
268extern pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma,
269 unsigned long address, pmd_t *pmdp);
270extern void radix__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
271 pgtable_t pgtable);
272extern pgtable_t radix__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
273extern pmd_t radix__pmdp_huge_get_and_clear(struct mm_struct *mm,
274 unsigned long addr, pmd_t *pmdp);
275static inline int radix__has_transparent_hugepage(void)
276{
277
278 if (mmu_psize_defs[MMU_PAGE_2M].shift == PMD_SHIFT)
279 return 1;
280 return 0;
281}
282#endif
283
284static inline pmd_t radix__pmd_mkdevmap(pmd_t pmd)
285{
286 return __pmd(pmd_val(pmd) | (_PAGE_PTE | _PAGE_DEVMAP));
287}
288
289extern int __meminit radix__vmemmap_create_mapping(unsigned long start,
290 unsigned long page_size,
291 unsigned long phys);
292extern void radix__vmemmap_remove_mapping(unsigned long start,
293 unsigned long page_size);
294
295extern int radix__map_kernel_page(unsigned long ea, unsigned long pa,
296 pgprot_t flags, unsigned int psz);
297
298static inline unsigned long radix__get_tree_size(void)
299{
300 unsigned long rts_field;
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308 rts_field = (0x5UL << 5);
309 rts_field |= (0x2UL << 61);
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311 return rts_field;
312}
313
314#ifdef CONFIG_MEMORY_HOTPLUG
315int radix__create_section_mapping(unsigned long start, unsigned long end,
316 int nid, pgprot_t prot);
317int radix__remove_section_mapping(unsigned long start, unsigned long end);
318#endif
319#endif
320#endif
321