1 #ifndef _ASM_POWERPC_BOOK3S_64_MMU_H_ 2 #define _ASM_POWERPC_BOOK3S_64_MMU_H_ 3 4 #ifndef __ASSEMBLY__ 5 /* 6 * Page size definition 7 * 8 * shift : is the "PAGE_SHIFT" value for that page size 9 * sllp : is a bit mask with the value of SLB L || LP to be or'ed 10 * directly to a slbmte "vsid" value 11 * penc : is the HPTE encoding mask for the "LP" field: 12 * 13 */ 14 struct mmu_psize_def { 15 unsigned int shift; /* number of bits */ 16 int penc[MMU_PAGE_COUNT]; /* HPTE encoding */ 17 unsigned int tlbiel; /* tlbiel supported for that page size */ 18 unsigned long avpnm; /* bits to mask out in AVPN in the HPTE */ 19 union { 20 unsigned long sllp; /* SLB L||LP (exact mask to use in slbmte) */ 21 unsigned long ap; /* Ap encoding used by PowerISA 3.0 */ 22 }; 23 }; 24 extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT]; 25 26 #endif /* __ASSEMBLY__ */ 27 28 /* 64-bit classic hash table MMU */ 29 #include <asm/book3s/64/mmu-hash.h> 30 31 #ifndef __ASSEMBLY__ 32 /* 33 * ISA 3.0 partition and process table entry format 34 */ 35 struct prtb_entry { 36 __be64 prtb0; 37 __be64 prtb1; 38 }; 39 extern struct prtb_entry *process_tb; 40 41 struct patb_entry { 42 __be64 patb0; 43 __be64 patb1; 44 }; 45 extern struct patb_entry *partition_tb; 46 47 /* Bits in patb0 field */ 48 #define PATB_HR (1UL << 63) 49 #define RPDB_MASK 0x0fffffffffffff00UL 50 #define RPDB_SHIFT (1UL << 8) 51 #define RTS1_SHIFT 61 /* top 2 bits of radix tree size */ 52 #define RTS1_MASK (3UL << RTS1_SHIFT) 53 #define RTS2_SHIFT 5 /* bottom 3 bits of radix tree size */ 54 #define RTS2_MASK (7UL << RTS2_SHIFT) 55 #define RPDS_MASK 0x1f /* root page dir. size field */ 56 57 /* Bits in patb1 field */ 58 #define PATB_GR (1UL << 63) /* guest uses radix; must match HR */ 59 #define PRTS_MASK 0x1f /* process table size field */ 60 #define PRTB_MASK 0x0ffffffffffff000UL 61 62 /* Number of supported PID bits */ 63 extern unsigned int mmu_pid_bits; 64 65 /* Base PID to allocate from */ 66 extern unsigned int mmu_base_pid; 67 68 #define PRTB_SIZE_SHIFT (mmu_pid_bits + 4) 69 #define PRTB_ENTRIES (1ul << mmu_pid_bits) 70 71 /* 72 * Power9 currently only support 64K partition table size. 73 */ 74 #define PATB_SIZE_SHIFT 16 75 76 typedef unsigned long mm_context_id_t; 77 struct spinlock; 78 79 /* Maximum possible number of NPUs in a system. */ 80 #define NV_MAX_NPUS 8 81 82 typedef struct { 83 mm_context_id_t id; 84 u16 user_psize; /* page size index */ 85 86 /* Number of bits in the mm_cpumask */ 87 atomic_t active_cpus; 88 89 /* NPU NMMU context */ 90 struct npu_context *npu_context; 91 92 #ifdef CONFIG_PPC_MM_SLICES 93 u64 low_slices_psize; /* SLB page size encodings */ 94 unsigned char high_slices_psize[SLICE_ARRAY_SIZE]; 95 unsigned long addr_limit; 96 #else 97 u16 sllp; /* SLB page size encoding */ 98 #endif 99 unsigned long vdso_base; 100 #ifdef CONFIG_PPC_SUBPAGE_PROT 101 struct subpage_prot_table spt; 102 #endif /* CONFIG_PPC_SUBPAGE_PROT */ 103 #ifdef CONFIG_PPC_64K_PAGES 104 /* for 4K PTE fragment support */ 105 void *pte_frag; 106 #endif 107 #ifdef CONFIG_SPAPR_TCE_IOMMU 108 struct list_head iommu_group_mem_list; 109 #endif 110 } mm_context_t; 111 112 /* 113 * The current system page and segment sizes 114 */ 115 extern int mmu_linear_psize; 116 extern int mmu_virtual_psize; 117 extern int mmu_vmalloc_psize; 118 extern int mmu_vmemmap_psize; 119 extern int mmu_io_psize; 120 121 /* MMU initialization */ 122 void mmu_early_init_devtree(void); 123 void hash__early_init_devtree(void); 124 void radix__early_init_devtree(void); 125 extern void radix_init_native(void); 126 extern void hash__early_init_mmu(void); 127 extern void radix__early_init_mmu(void); 128 static inline void early_init_mmu(void) 129 { 130 if (radix_enabled()) 131 return radix__early_init_mmu(); 132 return hash__early_init_mmu(); 133 } 134 extern void hash__early_init_mmu_secondary(void); 135 extern void radix__early_init_mmu_secondary(void); 136 static inline void early_init_mmu_secondary(void) 137 { 138 if (radix_enabled()) 139 return radix__early_init_mmu_secondary(); 140 return hash__early_init_mmu_secondary(); 141 } 142 143 extern void hash__setup_initial_memory_limit(phys_addr_t first_memblock_base, 144 phys_addr_t first_memblock_size); 145 extern void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base, 146 phys_addr_t first_memblock_size); 147 static inline void setup_initial_memory_limit(phys_addr_t first_memblock_base, 148 phys_addr_t first_memblock_size) 149 { 150 if (early_radix_enabled()) 151 return radix__setup_initial_memory_limit(first_memblock_base, 152 first_memblock_size); 153 return hash__setup_initial_memory_limit(first_memblock_base, 154 first_memblock_size); 155 } 156 157 extern int (*register_process_table)(unsigned long base, unsigned long page_size, 158 unsigned long tbl_size); 159 160 #ifdef CONFIG_PPC_PSERIES 161 extern void radix_init_pseries(void); 162 #else 163 static inline void radix_init_pseries(void) { }; 164 #endif 165 166 #endif /* __ASSEMBLY__ */ 167 #endif /* _ASM_POWERPC_BOOK3S_64_MMU_H_ */ 168