1 /* 2 * Declarations of procedures and variables shared between files 3 * in arch/ppc/mm/. 4 * 5 * Derived from arch/ppc/mm/init.c: 6 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) 7 * 8 * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au) 9 * and Cort Dougan (PReP) (cort@cs.nmt.edu) 10 * Copyright (C) 1996 Paul Mackerras 11 * 12 * Derived from "arch/i386/mm/init.c" 13 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation; either version 18 * 2 of the License, or (at your option) any later version. 19 * 20 */ 21 #include <linux/mm.h> 22 #include <asm/tlbflush.h> 23 #include <asm/mmu.h> 24 25 #ifdef CONFIG_PPC_MMU_NOHASH 26 27 /* 28 * On 40x and 8xx, we directly inline tlbia and tlbivax 29 */ 30 #if defined(CONFIG_40x) || defined(CONFIG_8xx) 31 static inline void _tlbil_all(void) 32 { 33 asm volatile ("sync; tlbia; isync" : : : "memory"); 34 } 35 static inline void _tlbil_pid(unsigned int pid) 36 { 37 asm volatile ("sync; tlbia; isync" : : : "memory"); 38 } 39 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) 40 41 #else /* CONFIG_40x || CONFIG_8xx */ 42 extern void _tlbil_all(void); 43 extern void _tlbil_pid(unsigned int pid); 44 #ifdef CONFIG_PPC_BOOK3E 45 extern void _tlbil_pid_noind(unsigned int pid); 46 #else 47 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) 48 #endif 49 #endif /* !(CONFIG_40x || CONFIG_8xx) */ 50 51 /* 52 * On 8xx, we directly inline tlbie, on others, it's extern 53 */ 54 #ifdef CONFIG_8xx 55 static inline void _tlbil_va(unsigned long address, unsigned int pid, 56 unsigned int tsize, unsigned int ind) 57 { 58 asm volatile ("tlbie %0; sync" : : "r" (address) : "memory"); 59 } 60 #elif defined(CONFIG_PPC_BOOK3E) 61 extern void _tlbil_va(unsigned long address, unsigned int pid, 62 unsigned int tsize, unsigned int ind); 63 #else 64 extern void __tlbil_va(unsigned long address, unsigned int pid); 65 static inline void _tlbil_va(unsigned long address, unsigned int pid, 66 unsigned int tsize, unsigned int ind) 67 { 68 __tlbil_va(address, pid); 69 } 70 #endif /* CONFIG_8xx */ 71 72 #if defined(CONFIG_PPC_BOOK3E) || defined(CONFIG_PPC_47x) 73 extern void _tlbivax_bcast(unsigned long address, unsigned int pid, 74 unsigned int tsize, unsigned int ind); 75 #else 76 static inline void _tlbivax_bcast(unsigned long address, unsigned int pid, 77 unsigned int tsize, unsigned int ind) 78 { 79 BUG(); 80 } 81 #endif 82 83 #else /* CONFIG_PPC_MMU_NOHASH */ 84 85 extern void hash_preload(struct mm_struct *mm, unsigned long ea, 86 unsigned long access, unsigned long trap); 87 88 89 extern void _tlbie(unsigned long address); 90 extern void _tlbia(void); 91 92 #endif /* CONFIG_PPC_MMU_NOHASH */ 93 94 #ifdef CONFIG_PPC32 95 96 extern void mapin_ram(void); 97 extern int map_page(unsigned long va, phys_addr_t pa, int flags); 98 extern void setbat(int index, unsigned long virt, phys_addr_t phys, 99 unsigned int size, pgprot_t prot); 100 101 extern int __map_without_bats; 102 extern int __allow_ioremap_reserved; 103 extern unsigned long ioremap_base; 104 extern unsigned int rtas_data, rtas_size; 105 106 struct hash_pte; 107 extern struct hash_pte *Hash, *Hash_end; 108 extern unsigned long Hash_size, Hash_mask; 109 110 #endif /* CONFIG_PPC32 */ 111 112 #ifdef CONFIG_PPC64 113 extern int map_kernel_page(unsigned long ea, unsigned long pa, int flags); 114 #endif /* CONFIG_PPC64 */ 115 116 extern unsigned long ioremap_bot; 117 extern unsigned long __max_low_memory; 118 extern phys_addr_t __initial_memory_limit_addr; 119 extern phys_addr_t total_memory; 120 extern phys_addr_t total_lowmem; 121 extern phys_addr_t memstart_addr; 122 extern phys_addr_t lowmem_end_addr; 123 124 #ifdef CONFIG_WII 125 extern unsigned long wii_hole_start; 126 extern unsigned long wii_hole_size; 127 128 extern unsigned long wii_mmu_mapin_mem2(unsigned long top); 129 extern void wii_memory_fixups(void); 130 #endif 131 132 /* ...and now those things that may be slightly different between processor 133 * architectures. -- Dan 134 */ 135 #if defined(CONFIG_8xx) 136 #define MMU_init_hw() do { } while(0) 137 #define mmu_mapin_ram(top) (0UL) 138 139 #elif defined(CONFIG_4xx) 140 extern void MMU_init_hw(void); 141 extern unsigned long mmu_mapin_ram(unsigned long top); 142 143 #elif defined(CONFIG_PPC_FSL_BOOK3E) 144 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, 145 bool dryrun); 146 extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt, 147 phys_addr_t phys); 148 #ifdef CONFIG_PPC32 149 extern void MMU_init_hw(void); 150 extern unsigned long mmu_mapin_ram(unsigned long top); 151 extern void adjust_total_lowmem(void); 152 extern int switch_to_as1(void); 153 extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu); 154 #endif 155 extern void loadcam_entry(unsigned int index); 156 extern void loadcam_multi(int first_idx, int num, int tmp_idx); 157 158 struct tlbcam { 159 u32 MAS0; 160 u32 MAS1; 161 unsigned long MAS2; 162 u32 MAS3; 163 u32 MAS7; 164 }; 165 #elif defined(CONFIG_PPC32) 166 /* anything 32-bit except 4xx or 8xx */ 167 extern void MMU_init_hw(void); 168 extern unsigned long mmu_mapin_ram(unsigned long top); 169 #endif 170