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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
11a6f6ab AK |
2 | #ifndef _ASM_POWERPC_BOOK3S_64_MMU_H_ |
3 | #define _ASM_POWERPC_BOOK3S_64_MMU_H_ | |
4 | ||
d09780f3 CL |
5 | #include <asm/page.h> |
6 | ||
11a6f6ab AK |
7 | #ifndef __ASSEMBLY__ |
8 | /* | |
9 | * Page size definition | |
10 | * | |
11 | * shift : is the "PAGE_SHIFT" value for that page size | |
12 | * sllp : is a bit mask with the value of SLB L || LP to be or'ed | |
13 | * directly to a slbmte "vsid" value | |
14 | * penc : is the HPTE encoding mask for the "LP" field: | |
15 | * | |
16 | */ | |
17 | struct mmu_psize_def { | |
18 | unsigned int shift; /* number of bits */ | |
19 | int penc[MMU_PAGE_COUNT]; /* HPTE encoding */ | |
20 | unsigned int tlbiel; /* tlbiel supported for that page size */ | |
21 | unsigned long avpnm; /* bits to mask out in AVPN in the HPTE */ | |
2bfd65e4 AK |
22 | union { |
23 | unsigned long sllp; /* SLB L||LP (exact mask to use in slbmte) */ | |
24 | unsigned long ap; /* Ap encoding used by PowerISA 3.0 */ | |
25 | }; | |
11a6f6ab AK |
26 | }; |
27 | extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT]; | |
566ca99a | 28 | |
d09780f3 CL |
29 | /* |
30 | * For BOOK3s 64 with 4k and 64K linux page size | |
31 | * we want to use pointers, because the page table | |
32 | * actually store pfn | |
33 | */ | |
34 | typedef pte_t *pgtable_t; | |
35 | ||
11a6f6ab AK |
36 | #endif /* __ASSEMBLY__ */ |
37 | ||
11a6f6ab AK |
38 | /* 64-bit classic hash table MMU */ |
39 | #include <asm/book3s/64/mmu-hash.h> | |
11a6f6ab AK |
40 | |
41 | #ifndef __ASSEMBLY__ | |
e9983344 | 42 | /* |
8ab102d6 | 43 | * ISA 3.0 partition and process table entry format |
e9983344 AK |
44 | */ |
45 | struct prtb_entry { | |
46 | __be64 prtb0; | |
47 | __be64 prtb1; | |
48 | }; | |
49 | extern struct prtb_entry *process_tb; | |
50 | ||
51 | struct patb_entry { | |
52 | __be64 patb0; | |
53 | __be64 patb1; | |
54 | }; | |
55 | extern struct patb_entry *partition_tb; | |
56 | ||
dbcbfee0 | 57 | /* Bits in patb0 field */ |
e9983344 | 58 | #define PATB_HR (1UL << 63) |
70cd4c10 | 59 | #define RPDB_MASK 0x0fffffffffffff00UL |
e9983344 | 60 | #define RPDB_SHIFT (1UL << 8) |
dbcbfee0 PM |
61 | #define RTS1_SHIFT 61 /* top 2 bits of radix tree size */ |
62 | #define RTS1_MASK (3UL << RTS1_SHIFT) | |
63 | #define RTS2_SHIFT 5 /* bottom 3 bits of radix tree size */ | |
64 | #define RTS2_MASK (7UL << RTS2_SHIFT) | |
65 | #define RPDS_MASK 0x1f /* root page dir. size field */ | |
66 | ||
67 | /* Bits in patb1 field */ | |
68 | #define PATB_GR (1UL << 63) /* guest uses radix; must match HR */ | |
69 | #define PRTS_MASK 0x1f /* process table size field */ | |
70cd4c10 | 70 | #define PRTB_MASK 0x0ffffffffffff000UL |
dbcbfee0 | 71 | |
a25bd72b BH |
72 | /* Number of supported PID bits */ |
73 | extern unsigned int mmu_pid_bits; | |
74 | ||
75 | /* Base PID to allocate from */ | |
76 | extern unsigned int mmu_base_pid; | |
77 | ||
78 | #define PRTB_SIZE_SHIFT (mmu_pid_bits + 4) | |
79 | #define PRTB_ENTRIES (1ul << mmu_pid_bits) | |
760573c1 | 80 | |
e9983344 AK |
81 | /* |
82 | * Power9 currently only support 64K partition table size. | |
83 | */ | |
84 | #define PATB_SIZE_SHIFT 16 | |
11a6f6ab AK |
85 | |
86 | typedef unsigned long mm_context_id_t; | |
87 | struct spinlock; | |
88 | ||
1ab66d1f AP |
89 | /* Maximum possible number of NPUs in a system. */ |
90 | #define NV_MAX_NPUS 8 | |
91 | ||
5709f7cf NP |
92 | /* |
93 | * One bit per slice. We have lower slices which cover 256MB segments | |
94 | * upto 4G range. That gets us 16 low slices. For the rest we track slices | |
95 | * in 1TB size. | |
96 | */ | |
97 | struct slice_mask { | |
98 | u64 low_slices; | |
99 | DECLARE_BITMAP(high_slices, SLICE_NUM_HIGH); | |
100 | }; | |
101 | ||
11a6f6ab | 102 | typedef struct { |
f384796c AK |
103 | union { |
104 | /* | |
105 | * We use id as the PIDR content for radix. On hash we can use | |
106 | * more than one id. The extended ids are used when we start | |
107 | * having address above 512TB. We allocate one extended id | |
108 | * for each 512TB. The new id is then used with the 49 bit | |
109 | * EA to build a new VA. We always use ESID_BITS_1T_MASK bits | |
110 | * from EA and new context ids to build the new VAs. | |
111 | */ | |
112 | mm_context_id_t id; | |
113 | mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE]; | |
114 | }; | |
11a6f6ab AK |
115 | u16 user_psize; /* page size index */ |
116 | ||
a619e59c BH |
117 | /* Number of bits in the mm_cpumask */ |
118 | atomic_t active_cpus; | |
119 | ||
aff6f8cb BH |
120 | /* Number of users of the external (Nest) MMU */ |
121 | atomic_t copros; | |
122 | ||
1ab66d1f AP |
123 | /* NPU NMMU context */ |
124 | struct npu_context *npu_context; | |
125 | ||
11a6f6ab | 126 | #ifdef CONFIG_PPC_MM_SLICES |
15472423 CL |
127 | /* SLB page size encodings*/ |
128 | unsigned char low_slices_psize[BITS_PER_LONG / BITS_PER_BYTE]; | |
11a6f6ab | 129 | unsigned char high_slices_psize[SLICE_ARRAY_SIZE]; |
4722476b | 130 | unsigned long slb_addr_limit; |
5709f7cf NP |
131 | # ifdef CONFIG_PPC_64K_PAGES |
132 | struct slice_mask mask_64k; | |
133 | # endif | |
134 | struct slice_mask mask_4k; | |
135 | # ifdef CONFIG_HUGETLB_PAGE | |
136 | struct slice_mask mask_16m; | |
137 | struct slice_mask mask_16g; | |
138 | # endif | |
11a6f6ab AK |
139 | #else |
140 | u16 sllp; /* SLB page size encoding */ | |
141 | #endif | |
142 | unsigned long vdso_base; | |
143 | #ifdef CONFIG_PPC_SUBPAGE_PROT | |
144 | struct subpage_prot_table spt; | |
145 | #endif /* CONFIG_PPC_SUBPAGE_PROT */ | |
1c7ec8a4 AK |
146 | /* |
147 | * pagetable fragment support | |
148 | */ | |
11a6f6ab | 149 | void *pte_frag; |
8a6c697b | 150 | void *pmd_frag; |
11a6f6ab AK |
151 | #ifdef CONFIG_SPAPR_TCE_IOMMU |
152 | struct list_head iommu_group_mem_list; | |
153 | #endif | |
4fb158f6 RP |
154 | |
155 | #ifdef CONFIG_PPC_MEM_KEYS | |
156 | /* | |
157 | * Each bit represents one protection key. | |
158 | * bit set -> key allocated | |
159 | * bit unset -> key available for allocation | |
160 | */ | |
161 | u32 pkey_allocation_map; | |
5586cf61 | 162 | s16 execute_only_pkey; /* key holding execute-only protection */ |
4fb158f6 | 163 | #endif |
11a6f6ab AK |
164 | } mm_context_t; |
165 | ||
166 | /* | |
167 | * The current system page and segment sizes | |
168 | */ | |
169 | extern int mmu_linear_psize; | |
170 | extern int mmu_virtual_psize; | |
171 | extern int mmu_vmalloc_psize; | |
172 | extern int mmu_vmemmap_psize; | |
173 | extern int mmu_io_psize; | |
174 | ||
756d08d1 | 175 | /* MMU initialization */ |
1a01dc87 | 176 | void mmu_early_init_devtree(void); |
bacf9cf8 | 177 | void hash__early_init_devtree(void); |
2537b09c | 178 | void radix__early_init_devtree(void); |
2bfd65e4 | 179 | extern void radix_init_native(void); |
756d08d1 | 180 | extern void hash__early_init_mmu(void); |
2bfd65e4 | 181 | extern void radix__early_init_mmu(void); |
756d08d1 AK |
182 | static inline void early_init_mmu(void) |
183 | { | |
2bfd65e4 AK |
184 | if (radix_enabled()) |
185 | return radix__early_init_mmu(); | |
756d08d1 AK |
186 | return hash__early_init_mmu(); |
187 | } | |
188 | extern void hash__early_init_mmu_secondary(void); | |
2bfd65e4 | 189 | extern void radix__early_init_mmu_secondary(void); |
756d08d1 AK |
190 | static inline void early_init_mmu_secondary(void) |
191 | { | |
2bfd65e4 AK |
192 | if (radix_enabled()) |
193 | return radix__early_init_mmu_secondary(); | |
756d08d1 AK |
194 | return hash__early_init_mmu_secondary(); |
195 | } | |
196 | ||
197 | extern void hash__setup_initial_memory_limit(phys_addr_t first_memblock_base, | |
198 | phys_addr_t first_memblock_size); | |
2bfd65e4 AK |
199 | extern void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base, |
200 | phys_addr_t first_memblock_size); | |
756d08d1 AK |
201 | static inline void setup_initial_memory_limit(phys_addr_t first_memblock_base, |
202 | phys_addr_t first_memblock_size) | |
203 | { | |
b8f1b4f8 | 204 | if (early_radix_enabled()) |
2bfd65e4 AK |
205 | return radix__setup_initial_memory_limit(first_memblock_base, |
206 | first_memblock_size); | |
756d08d1 AK |
207 | return hash__setup_initial_memory_limit(first_memblock_base, |
208 | first_memblock_size); | |
209 | } | |
eea8148c ME |
210 | |
211 | extern int (*register_process_table)(unsigned long base, unsigned long page_size, | |
212 | unsigned long tbl_size); | |
213 | ||
cc3d2940 PM |
214 | #ifdef CONFIG_PPC_PSERIES |
215 | extern void radix_init_pseries(void); | |
216 | #else | |
217 | static inline void radix_init_pseries(void) { }; | |
218 | #endif | |
219 | ||
c9f80734 | 220 | static inline int get_user_context(mm_context_t *ctx, unsigned long ea) |
f384796c AK |
221 | { |
222 | int index = ea >> MAX_EA_BITS_PER_CONTEXT; | |
223 | ||
224 | if (likely(index < ARRAY_SIZE(ctx->extended_id))) | |
225 | return ctx->extended_id[index]; | |
226 | ||
227 | /* should never happen */ | |
228 | WARN_ON(1); | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static inline unsigned long get_user_vsid(mm_context_t *ctx, | |
233 | unsigned long ea, int ssize) | |
234 | { | |
c9f80734 | 235 | unsigned long context = get_user_context(ctx, ea); |
f384796c AK |
236 | |
237 | return get_vsid(context, ea, ssize); | |
238 | } | |
239 | ||
11a6f6ab AK |
240 | #endif /* __ASSEMBLY__ */ |
241 | #endif /* _ASM_POWERPC_BOOK3S_64_MMU_H_ */ |