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 #else /* CONFIG_40x || CONFIG_8xx */ 40 extern void _tlbil_all(void); 41 extern void _tlbil_pid(unsigned int pid); 42 #endif /* !(CONFIG_40x || CONFIG_8xx) */ 43 44 /* 45 * On 8xx, we directly inline tlbie, on others, it's extern 46 */ 47 #ifdef CONFIG_8xx 48 static inline void _tlbil_va(unsigned long address, unsigned int pid) 49 { 50 asm volatile ("tlbie %0; sync" : : "r" (address) : "memory"); 51 } 52 #else /* CONFIG_8xx */ 53 extern void _tlbil_va(unsigned long address, unsigned int pid); 54 #endif /* CONIFG_8xx */ 55 56 /* 57 * As of today, we don't support tlbivax broadcast on any 58 * implementation. When that becomes the case, this will be 59 * an extern. 60 */ 61 static inline void _tlbivax_bcast(unsigned long address, unsigned int pid) 62 { 63 BUG(); 64 } 65 66 #else /* CONFIG_PPC_MMU_NOHASH */ 67 68 extern void hash_preload(struct mm_struct *mm, unsigned long ea, 69 unsigned long access, unsigned long trap); 70 71 72 extern void _tlbie(unsigned long address); 73 extern void _tlbia(void); 74 75 #endif /* CONFIG_PPC_MMU_NOHASH */ 76 77 #ifdef CONFIG_PPC32 78 79 struct tlbcam { 80 u32 MAS0; 81 u32 MAS1; 82 u32 MAS2; 83 u32 MAS3; 84 u32 MAS7; 85 }; 86 87 extern void mapin_ram(void); 88 extern int map_page(unsigned long va, phys_addr_t pa, int flags); 89 extern void setbat(int index, unsigned long virt, phys_addr_t phys, 90 unsigned int size, int flags); 91 extern void settlbcam(int index, unsigned long virt, phys_addr_t phys, 92 unsigned int size, int flags, unsigned int pid); 93 extern void invalidate_tlbcam_entry(int index); 94 95 extern int __map_without_bats; 96 extern unsigned long ioremap_base; 97 extern unsigned int rtas_data, rtas_size; 98 99 struct hash_pte; 100 extern struct hash_pte *Hash, *Hash_end; 101 extern unsigned long Hash_size, Hash_mask; 102 #endif 103 104 extern unsigned long ioremap_bot; 105 extern unsigned long __max_low_memory; 106 extern phys_addr_t __initial_memory_limit_addr; 107 extern phys_addr_t total_memory; 108 extern phys_addr_t total_lowmem; 109 extern phys_addr_t memstart_addr; 110 extern phys_addr_t lowmem_end_addr; 111 112 /* ...and now those things that may be slightly different between processor 113 * architectures. -- Dan 114 */ 115 #if defined(CONFIG_8xx) 116 #define MMU_init_hw() do { } while(0) 117 #define mmu_mapin_ram() (0UL) 118 119 #elif defined(CONFIG_4xx) 120 extern void MMU_init_hw(void); 121 extern unsigned long mmu_mapin_ram(void); 122 123 #elif defined(CONFIG_FSL_BOOKE) 124 extern void MMU_init_hw(void); 125 extern unsigned long mmu_mapin_ram(void); 126 extern void adjust_total_lowmem(void); 127 128 #elif defined(CONFIG_PPC32) 129 /* anything 32-bit except 4xx or 8xx */ 130 extern void MMU_init_hw(void); 131 extern unsigned long mmu_mapin_ram(void); 132 #endif 133