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 /* CONIFG_8xx */ 71 72 /* 73 * As of today, we don't support tlbivax broadcast on any 74 * implementation. When that becomes the case, this will be 75 * an extern. 76 */ 77 #ifdef CONFIG_PPC_BOOK3E 78 extern void _tlbivax_bcast(unsigned long address, unsigned int pid, 79 unsigned int tsize, unsigned int ind); 80 #else 81 static inline void _tlbivax_bcast(unsigned long address, unsigned int pid, 82 unsigned int tsize, unsigned int ind) 83 { 84 BUG(); 85 } 86 #endif 87 88 #else /* CONFIG_PPC_MMU_NOHASH */ 89 90 extern void hash_preload(struct mm_struct *mm, unsigned long ea, 91 unsigned long access, unsigned long trap); 92 93 94 extern void _tlbie(unsigned long address); 95 extern void _tlbia(void); 96 97 #endif /* CONFIG_PPC_MMU_NOHASH */ 98 99 #ifdef CONFIG_PPC32 100 101 extern void mapin_ram(void); 102 extern int map_page(unsigned long va, phys_addr_t pa, int flags); 103 extern void setbat(int index, unsigned long virt, phys_addr_t phys, 104 unsigned int size, int flags); 105 106 extern int __map_without_bats; 107 extern int __allow_ioremap_reserved; 108 extern unsigned long ioremap_base; 109 extern unsigned int rtas_data, rtas_size; 110 111 struct hash_pte; 112 extern struct hash_pte *Hash, *Hash_end; 113 extern unsigned long Hash_size, Hash_mask; 114 115 #endif /* CONFIG_PPC32 */ 116 117 #ifdef CONFIG_PPC64 118 extern int map_kernel_page(unsigned long ea, unsigned long pa, int flags); 119 #endif /* CONFIG_PPC64 */ 120 121 extern unsigned long ioremap_bot; 122 extern unsigned long __max_low_memory; 123 extern phys_addr_t __initial_memory_limit_addr; 124 extern phys_addr_t total_memory; 125 extern phys_addr_t total_lowmem; 126 extern phys_addr_t memstart_addr; 127 extern phys_addr_t lowmem_end_addr; 128 129 #ifdef CONFIG_WII 130 extern unsigned long wii_hole_start; 131 extern unsigned long wii_hole_size; 132 133 extern unsigned long wii_mmu_mapin_mem2(unsigned long top); 134 extern void wii_memory_fixups(void); 135 #endif 136 137 /* ...and now those things that may be slightly different between processor 138 * architectures. -- Dan 139 */ 140 #if defined(CONFIG_8xx) 141 #define MMU_init_hw() do { } while(0) 142 #define mmu_mapin_ram(top) (0UL) 143 144 #elif defined(CONFIG_4xx) 145 extern void MMU_init_hw(void); 146 extern unsigned long mmu_mapin_ram(unsigned long top); 147 148 #elif defined(CONFIG_FSL_BOOKE) 149 extern void MMU_init_hw(void); 150 extern unsigned long mmu_mapin_ram(unsigned long top); 151 extern void adjust_total_lowmem(void); 152 153 #elif defined(CONFIG_PPC32) 154 /* anything 32-bit except 4xx or 8xx */ 155 extern void MMU_init_hw(void); 156 extern unsigned long mmu_mapin_ram(unsigned long top); 157 #endif 158