1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Declarations of procedures and variables shared between files 4 * in arch/ppc/mm/. 5 * 6 * Derived from arch/ppc/mm/init.c: 7 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) 8 * 9 * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au) 10 * and Cort Dougan (PReP) (cort@cs.nmt.edu) 11 * Copyright (C) 1996 Paul Mackerras 12 * 13 * Derived from "arch/i386/mm/init.c" 14 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds 15 */ 16 #include <linux/mm.h> 17 #include <asm/mmu.h> 18 19 #ifdef CONFIG_PPC_MMU_NOHASH 20 #include <asm/trace.h> 21 22 /* 23 * On 40x and 8xx, we directly inline tlbia and tlbivax 24 */ 25 #if defined(CONFIG_40x) || defined(CONFIG_PPC_8xx) 26 static inline void _tlbil_all(void) 27 { 28 asm volatile ("sync; tlbia; isync" : : : "memory"); 29 trace_tlbia(MMU_NO_CONTEXT); 30 } 31 static inline void _tlbil_pid(unsigned int pid) 32 { 33 asm volatile ("sync; tlbia; isync" : : : "memory"); 34 trace_tlbia(pid); 35 } 36 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) 37 38 #else /* CONFIG_40x || CONFIG_PPC_8xx */ 39 extern void _tlbil_all(void); 40 extern void _tlbil_pid(unsigned int pid); 41 #ifdef CONFIG_PPC_BOOK3E 42 extern void _tlbil_pid_noind(unsigned int pid); 43 #else 44 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) 45 #endif 46 #endif /* !(CONFIG_40x || CONFIG_PPC_8xx) */ 47 48 /* 49 * On 8xx, we directly inline tlbie, on others, it's extern 50 */ 51 #ifdef CONFIG_PPC_8xx 52 static inline void _tlbil_va(unsigned long address, unsigned int pid, 53 unsigned int tsize, unsigned int ind) 54 { 55 asm volatile ("tlbie %0; sync" : : "r" (address) : "memory"); 56 trace_tlbie(0, 0, address, pid, 0, 0, 0); 57 } 58 #elif defined(CONFIG_PPC_BOOK3E) 59 extern void _tlbil_va(unsigned long address, unsigned int pid, 60 unsigned int tsize, unsigned int ind); 61 #else 62 extern void __tlbil_va(unsigned long address, unsigned int pid); 63 static inline void _tlbil_va(unsigned long address, unsigned int pid, 64 unsigned int tsize, unsigned int ind) 65 { 66 __tlbil_va(address, pid); 67 } 68 #endif /* CONFIG_PPC_8xx */ 69 70 #if defined(CONFIG_PPC_BOOK3E) || defined(CONFIG_PPC_47x) 71 extern void _tlbivax_bcast(unsigned long address, unsigned int pid, 72 unsigned int tsize, unsigned int ind); 73 #else 74 static inline void _tlbivax_bcast(unsigned long address, unsigned int pid, 75 unsigned int tsize, unsigned int ind) 76 { 77 BUG(); 78 } 79 #endif 80 81 static inline void print_system_hash_info(void) {} 82 83 #else /* CONFIG_PPC_MMU_NOHASH */ 84 85 void print_system_hash_info(void); 86 87 #endif /* CONFIG_PPC_MMU_NOHASH */ 88 89 #ifdef CONFIG_PPC32 90 91 extern void mapin_ram(void); 92 extern void setbat(int index, unsigned long virt, phys_addr_t phys, 93 unsigned int size, pgprot_t prot); 94 95 extern int __map_without_bats; 96 extern unsigned int rtas_data, rtas_size; 97 98 struct hash_pte; 99 extern u8 early_hash[]; 100 101 #endif /* CONFIG_PPC32 */ 102 103 extern unsigned long __max_low_memory; 104 extern phys_addr_t __initial_memory_limit_addr; 105 extern phys_addr_t total_memory; 106 extern phys_addr_t total_lowmem; 107 extern phys_addr_t memstart_addr; 108 extern phys_addr_t lowmem_end_addr; 109 110 #ifdef CONFIG_WII 111 extern unsigned long wii_hole_start; 112 extern unsigned long wii_hole_size; 113 114 extern unsigned long wii_mmu_mapin_mem2(unsigned long top); 115 extern void wii_memory_fixups(void); 116 #endif 117 118 /* ...and now those things that may be slightly different between processor 119 * architectures. -- Dan 120 */ 121 #ifdef CONFIG_PPC32 122 extern void MMU_init_hw(void); 123 void MMU_init_hw_patch(void); 124 unsigned long mmu_mapin_ram(unsigned long base, unsigned long top); 125 #endif 126 127 #ifdef CONFIG_PPC_FSL_BOOK3E 128 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, 129 bool dryrun, bool init); 130 extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt, 131 phys_addr_t phys); 132 #ifdef CONFIG_PPC32 133 extern void adjust_total_lowmem(void); 134 extern int switch_to_as1(void); 135 extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu); 136 void create_kaslr_tlb_entry(int entry, unsigned long virt, phys_addr_t phys); 137 void reloc_kernel_entry(void *fdt, int addr); 138 extern int is_second_reloc; 139 #endif 140 extern void loadcam_entry(unsigned int index); 141 extern void loadcam_multi(int first_idx, int num, int tmp_idx); 142 143 #ifdef CONFIG_RANDOMIZE_BASE 144 void kaslr_early_init(void *dt_ptr, phys_addr_t size); 145 void kaslr_late_init(void); 146 #else 147 static inline void kaslr_early_init(void *dt_ptr, phys_addr_t size) {} 148 static inline void kaslr_late_init(void) {} 149 #endif 150 151 struct tlbcam { 152 u32 MAS0; 153 u32 MAS1; 154 unsigned long MAS2; 155 u32 MAS3; 156 u32 MAS7; 157 }; 158 #endif 159 160 #if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_FSL_BOOKE) || defined(CONFIG_PPC_8xx) 161 /* 6xx have BATS */ 162 /* FSL_BOOKE have TLBCAM */ 163 /* 8xx have LTLB */ 164 phys_addr_t v_block_mapped(unsigned long va); 165 unsigned long p_block_mapped(phys_addr_t pa); 166 #else 167 static inline phys_addr_t v_block_mapped(unsigned long va) { return 0; } 168 static inline unsigned long p_block_mapped(phys_addr_t pa) { return 0; } 169 #endif 170 171 #if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_FSL_BOOK3E) 172 void mmu_mark_initmem_nx(void); 173 void mmu_mark_rodata_ro(void); 174 #else 175 static inline void mmu_mark_initmem_nx(void) { } 176 static inline void mmu_mark_rodata_ro(void) { } 177 #endif 178 179 #ifdef CONFIG_PPC_8xx 180 void __init mmu_mapin_immr(void); 181 #endif 182 183 #ifdef CONFIG_DEBUG_WX 184 void ptdump_check_wx(void); 185 #else 186 static inline void ptdump_check_wx(void) { } 187 #endif 188 189 static inline bool debug_pagealloc_enabled_or_kfence(void) 190 { 191 return IS_ENABLED(CONFIG_KFENCE) || debug_pagealloc_enabled(); 192 } 193