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 * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk). 12 * 13 * Derived from "arch/i386/mm/init.c" 14 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds 15 * 16 * This program is free software; you can redistribute it and/or 17 * modify it under the terms of the GNU General Public License 18 * as published by the Free Software Foundation; either version 19 * 2 of the License, or (at your option) any later version. 20 * 21 */ 22 #include <linux/mm.h> 23 #include <asm/tlbflush.h> 24 #include <asm/mmu.h> 25 26 extern void hash_preload(struct mm_struct *mm, unsigned long ea, 27 unsigned long access, unsigned long trap); 28 29 30 #ifdef CONFIG_PPC32 31 extern void mapin_ram(void); 32 extern int map_page(unsigned long va, phys_addr_t pa, int flags); 33 extern void setbat(int index, unsigned long virt, unsigned long phys, 34 unsigned int size, int flags); 35 extern void settlbcam(int index, unsigned long virt, phys_addr_t phys, 36 unsigned int size, int flags, unsigned int pid); 37 extern void invalidate_tlbcam_entry(int index); 38 39 extern int __map_without_bats; 40 extern unsigned long ioremap_base; 41 extern unsigned int rtas_data, rtas_size; 42 43 struct _PTE; 44 extern struct _PTE *Hash, *Hash_end; 45 extern unsigned long Hash_size, Hash_mask; 46 47 extern unsigned int num_tlbcam_entries; 48 #endif 49 50 extern unsigned long ioremap_bot; 51 extern unsigned long __max_low_memory; 52 extern unsigned long __initial_memory_limit; 53 extern unsigned long total_memory; 54 extern unsigned long total_lowmem; 55 56 /* ...and now those things that may be slightly different between processor 57 * architectures. -- Dan 58 */ 59 #if defined(CONFIG_8xx) 60 #define flush_HPTE(X, va, pg) _tlbie(va) 61 #define MMU_init_hw() do { } while(0) 62 #define mmu_mapin_ram() (0UL) 63 64 #elif defined(CONFIG_4xx) 65 #define flush_HPTE(X, va, pg) _tlbie(va) 66 extern void MMU_init_hw(void); 67 extern unsigned long mmu_mapin_ram(void); 68 69 #elif defined(CONFIG_FSL_BOOKE) 70 #define flush_HPTE(X, va, pg) _tlbie(va) 71 extern void MMU_init_hw(void); 72 extern unsigned long mmu_mapin_ram(void); 73 extern void adjust_total_lowmem(void); 74 75 #elif defined(CONFIG_PPC32) 76 /* anything 32-bit except 4xx or 8xx */ 77 extern void MMU_init_hw(void); 78 extern unsigned long mmu_mapin_ram(void); 79 80 /* Be careful....this needs to be updated if we ever encounter 603 SMPs, 81 * which includes all new 82xx processors. We need tlbie/tlbsync here 82 * in that case (I think). -- Dan. 83 */ 84 static inline void flush_HPTE(unsigned context, unsigned long va, 85 unsigned long pdval) 86 { 87 if ((Hash != 0) && 88 cpu_has_feature(CPU_FTR_HPTE_TABLE)) 89 flush_hash_pages(0, va, pdval, 1); 90 else 91 _tlbie(va); 92 } 93 #else /* CONFIG_PPC64 */ 94 /* imalloc region types */ 95 #define IM_REGION_UNUSED 0x1 96 #define IM_REGION_SUBSET 0x2 97 #define IM_REGION_EXISTS 0x4 98 #define IM_REGION_OVERLAP 0x8 99 #define IM_REGION_SUPERSET 0x10 100 101 extern struct vm_struct * im_get_free_area(unsigned long size); 102 extern struct vm_struct * im_get_area(unsigned long v_addr, unsigned long size, 103 int region_type); 104 extern void im_free(void *addr); 105 #endif 106