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_PGD_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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93
94#define RADIX_KERN_VIRT_START ASM_CONST(0xc008000000000000)
95
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98
99#define RADIX_KERN_MAP_SIZE (1UL << 49)
100
101#define RADIX_VMALLOC_START RADIX_KERN_VIRT_START
102#define RADIX_VMALLOC_SIZE RADIX_KERN_MAP_SIZE
103#define RADIX_VMALLOC_END (RADIX_VMALLOC_START + RADIX_VMALLOC_SIZE)
104
105#define RADIX_KERN_IO_START RADIX_VMALLOC_END
106#define RADIX_KERN_IO_SIZE RADIX_KERN_MAP_SIZE
107#define RADIX_KERN_IO_END (RADIX_KERN_IO_START + RADIX_KERN_IO_SIZE)
108
109#define RADIX_VMEMMAP_START RADIX_KERN_IO_END
110#define RADIX_VMEMMAP_SIZE RADIX_KERN_MAP_SIZE
111#define RADIX_VMEMMAP_END (RADIX_VMEMMAP_START + RADIX_VMEMMAP_SIZE)
112
113#ifndef __ASSEMBLY__
114#define RADIX_PTE_TABLE_SIZE (sizeof(pte_t) << RADIX_PTE_INDEX_SIZE)
115#define RADIX_PMD_TABLE_SIZE (sizeof(pmd_t) << RADIX_PMD_INDEX_SIZE)
116#define RADIX_PUD_TABLE_SIZE (sizeof(pud_t) << RADIX_PUD_INDEX_SIZE)
117#define RADIX_PGD_TABLE_SIZE (sizeof(pgd_t) << RADIX_PGD_INDEX_SIZE)
118
119#ifdef CONFIG_STRICT_KERNEL_RWX
120extern void radix__mark_rodata_ro(void);
121extern void radix__mark_initmem_nx(void);
122#endif
123
124extern void radix__ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep,
125 pte_t entry, unsigned long address,
126 int psize);
127
128extern void radix__ptep_modify_prot_commit(struct vm_area_struct *vma,
129 unsigned long addr, pte_t *ptep,
130 pte_t old_pte, pte_t pte);
131
132static inline unsigned long __radix_pte_update(pte_t *ptep, unsigned long clr,
133 unsigned long set)
134{
135 __be64 old_be, tmp_be;
136
137 __asm__ __volatile__(
138 "1: ldarx %0,0,%3 # pte_update\n"
139 " andc %1,%0,%5 \n"
140 " or %1,%1,%4 \n"
141 " stdcx. %1,0,%3 \n"
142 " bne- 1b"
143 : "=&r" (old_be), "=&r" (tmp_be), "=m" (*ptep)
144 : "r" (ptep), "r" (cpu_to_be64(set)), "r" (cpu_to_be64(clr))
145 : "cc" );
146
147 return be64_to_cpu(old_be);
148}
149
150static inline unsigned long radix__pte_update(struct mm_struct *mm,
151 unsigned long addr,
152 pte_t *ptep, unsigned long clr,
153 unsigned long set,
154 int huge)
155{
156 unsigned long old_pte;
157
158 old_pte = __radix_pte_update(ptep, clr, set);
159 if (!huge)
160 assert_pte_locked(mm, addr);
161
162 return old_pte;
163}
164
165static inline pte_t radix__ptep_get_and_clear_full(struct mm_struct *mm,
166 unsigned long addr,
167 pte_t *ptep, int full)
168{
169 unsigned long old_pte;
170
171 if (full) {
172 old_pte = pte_val(*ptep);
173 *ptep = __pte(0);
174 } else
175 old_pte = radix__pte_update(mm, addr, ptep, ~0ul, 0, 0);
176
177 return __pte(old_pte);
178}
179
180static inline int radix__pte_same(pte_t pte_a, pte_t pte_b)
181{
182 return ((pte_raw(pte_a) ^ pte_raw(pte_b)) == 0);
183}
184
185static inline int radix__pte_none(pte_t pte)
186{
187 return (pte_val(pte) & ~RADIX_PTE_NONE_MASK) == 0;
188}
189
190static inline void radix__set_pte_at(struct mm_struct *mm, unsigned long addr,
191 pte_t *ptep, pte_t pte, int percpu)
192{
193 *ptep = pte;
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212}
213
214static inline int radix__pmd_bad(pmd_t pmd)
215{
216 return !!(pmd_val(pmd) & RADIX_PMD_BAD_BITS);
217}
218
219static inline int radix__pmd_same(pmd_t pmd_a, pmd_t pmd_b)
220{
221 return ((pmd_raw(pmd_a) ^ pmd_raw(pmd_b)) == 0);
222}
223
224static inline int radix__pud_bad(pud_t pud)
225{
226 return !!(pud_val(pud) & RADIX_PUD_BAD_BITS);
227}
228
229
230static inline int radix__pgd_bad(pgd_t pgd)
231{
232 return !!(pgd_val(pgd) & RADIX_PGD_BAD_BITS);
233}
234
235#ifdef CONFIG_TRANSPARENT_HUGEPAGE
236
237static inline int radix__pmd_trans_huge(pmd_t pmd)
238{
239 return (pmd_val(pmd) & (_PAGE_PTE | _PAGE_DEVMAP)) == _PAGE_PTE;
240}
241
242static inline pmd_t radix__pmd_mkhuge(pmd_t pmd)
243{
244 return __pmd(pmd_val(pmd) | _PAGE_PTE);
245}
246
247extern unsigned long radix__pmd_hugepage_update(struct mm_struct *mm, unsigned long addr,
248 pmd_t *pmdp, unsigned long clr,
249 unsigned long set);
250extern pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma,
251 unsigned long address, pmd_t *pmdp);
252extern void radix__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
253 pgtable_t pgtable);
254extern pgtable_t radix__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
255extern pmd_t radix__pmdp_huge_get_and_clear(struct mm_struct *mm,
256 unsigned long addr, pmd_t *pmdp);
257static inline int radix__has_transparent_hugepage(void)
258{
259
260 if (mmu_psize_defs[MMU_PAGE_2M].shift == PMD_SHIFT)
261 return 1;
262 return 0;
263}
264#endif
265
266extern int __meminit radix__vmemmap_create_mapping(unsigned long start,
267 unsigned long page_size,
268 unsigned long phys);
269extern void radix__vmemmap_remove_mapping(unsigned long start,
270 unsigned long page_size);
271
272extern int radix__map_kernel_page(unsigned long ea, unsigned long pa,
273 pgprot_t flags, unsigned int psz);
274
275static inline unsigned long radix__get_tree_size(void)
276{
277 unsigned long rts_field;
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285 rts_field = (0x5UL << 5);
286 rts_field |= (0x2UL << 61);
287
288 return rts_field;
289}
290
291#ifdef CONFIG_MEMORY_HOTPLUG
292int radix__create_section_mapping(unsigned long start, unsigned long end, int nid);
293int radix__remove_section_mapping(unsigned long start, unsigned long end);
294#endif
295#endif
296#endif
297