1
2#ifndef _ASM_POWERPC_BOOK3S_64_HASH_H
3#define _ASM_POWERPC_BOOK3S_64_HASH_H
4#ifdef __KERNEL__
5
6#include <asm/asm-const.h>
7
8
9
10
11
12
13#define H_PTE_NONE_MASK _PAGE_HPTEFLAGS
14
15#ifdef CONFIG_PPC_64K_PAGES
16#include <asm/book3s/64/hash-64k.h>
17#else
18#include <asm/book3s/64/hash-4k.h>
19#endif
20
21
22#define HASH_PMD_VAL_BITS (0x8000000000000000UL)
23#define HASH_PUD_VAL_BITS (0x8000000000000000UL)
24#define HASH_PGD_VAL_BITS (0x8000000000000000UL)
25
26
27
28
29#define H_PGTABLE_EADDR_SIZE (H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + \
30 H_PUD_INDEX_SIZE + H_PGD_INDEX_SIZE + PAGE_SHIFT)
31#define H_PGTABLE_RANGE (ASM_CONST(1) << H_PGTABLE_EADDR_SIZE)
32
33
34
35#define EA_MASK (~(0xcUL << 60))
36
37
38
39
40
41
42#if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_PPC_64K_PAGES)
43#define H_PUD_CACHE_INDEX (H_PUD_INDEX_SIZE + 1)
44#else
45#define H_PUD_CACHE_INDEX (H_PUD_INDEX_SIZE)
46#endif
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72
73
74#define H_VMALLOC_START H_KERN_VIRT_START
75#define H_VMALLOC_SIZE H_KERN_MAP_SIZE
76#define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE)
77
78#define H_KERN_IO_START H_VMALLOC_END
79#define H_KERN_IO_SIZE H_KERN_MAP_SIZE
80#define H_KERN_IO_END (H_KERN_IO_START + H_KERN_IO_SIZE)
81
82#define H_VMEMMAP_START H_KERN_IO_END
83#define H_VMEMMAP_SIZE H_KERN_MAP_SIZE
84#define H_VMEMMAP_END (H_VMEMMAP_START + H_VMEMMAP_SIZE)
85
86#define NON_LINEAR_REGION_ID(ea) ((((unsigned long)ea - H_KERN_VIRT_START) >> REGION_SHIFT) + 2)
87
88
89
90
91#define USER_REGION_ID 0
92#define LINEAR_MAP_REGION_ID 1
93#define VMALLOC_REGION_ID NON_LINEAR_REGION_ID(H_VMALLOC_START)
94#define IO_REGION_ID NON_LINEAR_REGION_ID(H_KERN_IO_START)
95#define VMEMMAP_REGION_ID NON_LINEAR_REGION_ID(H_VMEMMAP_START)
96#define INVALID_REGION_ID (VMEMMAP_REGION_ID + 1)
97
98
99
100
101
102#ifdef CONFIG_PPC_MM_SLICES
103#define HAVE_ARCH_UNMAPPED_AREA
104#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
105#endif
106
107
108#define _PTEIDX_SECONDARY 0x8
109#define _PTEIDX_GROUP_IX 0x7
110
111#define H_PMD_BAD_BITS (PTE_TABLE_SIZE-1)
112#define H_PUD_BAD_BITS (PMD_TABLE_SIZE-1)
113
114#ifndef __ASSEMBLY__
115static inline int get_region_id(unsigned long ea)
116{
117 int region_id;
118 int id = (ea >> 60UL);
119
120 if (id == 0)
121 return USER_REGION_ID;
122
123 if (id != (PAGE_OFFSET >> 60))
124 return INVALID_REGION_ID;
125
126 if (ea < H_KERN_VIRT_START)
127 return LINEAR_MAP_REGION_ID;
128
129 BUILD_BUG_ON(NON_LINEAR_REGION_ID(H_VMALLOC_START) != 2);
130
131 region_id = NON_LINEAR_REGION_ID(ea);
132 return region_id;
133}
134
135#define hash__pmd_bad(pmd) (pmd_val(pmd) & H_PMD_BAD_BITS)
136#define hash__pud_bad(pud) (pud_val(pud) & H_PUD_BAD_BITS)
137static inline int hash__p4d_bad(p4d_t p4d)
138{
139 return (p4d_val(p4d) == 0);
140}
141#ifdef CONFIG_STRICT_KERNEL_RWX
142extern void hash__mark_rodata_ro(void);
143extern void hash__mark_initmem_nx(void);
144#endif
145
146extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
147 pte_t *ptep, unsigned long pte, int huge);
148unsigned long htab_convert_pte_flags(unsigned long pteflags, unsigned long flags);
149
150static inline unsigned long hash__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 __be64 old_be, tmp_be;
157 unsigned long old;
158
159 __asm__ __volatile__(
160 "1: ldarx %0,0,%3 # pte_update\n\
161 and. %1,%0,%6\n\
162 bne- 1b \n\
163 andc %1,%0,%4 \n\
164 or %1,%1,%7\n\
165 stdcx. %1,0,%3 \n\
166 bne- 1b"
167 : "=&r" (old_be), "=&r" (tmp_be), "=m" (*ptep)
168 : "r" (ptep), "r" (cpu_to_be64(clr)), "m" (*ptep),
169 "r" (cpu_to_be64(H_PAGE_BUSY)), "r" (cpu_to_be64(set))
170 : "cc" );
171
172 if (!huge)
173 assert_pte_locked(mm, addr);
174
175 old = be64_to_cpu(old_be);
176 if (old & H_PAGE_HASHPTE)
177 hpte_need_flush(mm, addr, ptep, old, huge);
178
179 return old;
180}
181
182
183
184
185static inline void hash__ptep_set_access_flags(pte_t *ptep, pte_t entry)
186{
187 __be64 old, tmp, val, mask;
188
189 mask = cpu_to_be64(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_READ | _PAGE_WRITE |
190 _PAGE_EXEC | _PAGE_SOFT_DIRTY);
191
192 val = pte_raw(entry) & mask;
193
194 __asm__ __volatile__(
195 "1: ldarx %0,0,%4\n\
196 and. %1,%0,%6\n\
197 bne- 1b \n\
198 or %0,%3,%0\n\
199 stdcx. %0,0,%4\n\
200 bne- 1b"
201 :"=&r" (old), "=&r" (tmp), "=m" (*ptep)
202 :"r" (val), "r" (ptep), "m" (*ptep), "r" (cpu_to_be64(H_PAGE_BUSY))
203 :"cc");
204}
205
206static inline int hash__pte_same(pte_t pte_a, pte_t pte_b)
207{
208 return (((pte_raw(pte_a) ^ pte_raw(pte_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0);
209}
210
211static inline int hash__pte_none(pte_t pte)
212{
213 return (pte_val(pte) & ~H_PTE_NONE_MASK) == 0;
214}
215
216unsigned long pte_get_hash_gslot(unsigned long vpn, unsigned long shift,
217 int ssize, real_pte_t rpte, unsigned int subpg_index);
218
219
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222
223
224static inline void hash__set_pte_at(struct mm_struct *mm, unsigned long addr,
225 pte_t *ptep, pte_t pte, int percpu)
226{
227
228
229
230
231 *ptep = pte;
232}
233
234#ifdef CONFIG_TRANSPARENT_HUGEPAGE
235extern void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr,
236 pmd_t *pmdp, unsigned long old_pmd);
237#else
238static inline void hpte_do_hugepage_flush(struct mm_struct *mm,
239 unsigned long addr, pmd_t *pmdp,
240 unsigned long old_pmd)
241{
242 WARN(1, "%s called with THP disabled\n", __func__);
243}
244#endif
245
246
247int hash__map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot);
248extern int __meminit hash__vmemmap_create_mapping(unsigned long start,
249 unsigned long page_size,
250 unsigned long phys);
251extern void hash__vmemmap_remove_mapping(unsigned long start,
252 unsigned long page_size);
253
254int hash__create_section_mapping(unsigned long start, unsigned long end,
255 int nid, pgprot_t prot);
256int hash__remove_section_mapping(unsigned long start, unsigned long end);
257
258#endif
259#endif
260#endif
261