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