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 <asm/tlbflush.h> 23 #include <asm/mmu.h> 24 25 #ifdef CONFIG_PPC32 26 extern void mapin_ram(void); 27 extern int map_page(unsigned long va, phys_addr_t pa, int flags); 28 extern void setbat(int index, unsigned long virt, unsigned long phys, 29 unsigned int size, int flags); 30 extern void settlbcam(int index, unsigned long virt, phys_addr_t phys, 31 unsigned int size, int flags, unsigned int pid); 32 extern void invalidate_tlbcam_entry(int index); 33 34 extern int __map_without_bats; 35 extern unsigned long ioremap_base; 36 extern unsigned int rtas_data, rtas_size; 37 38 extern PTE *Hash, *Hash_end; 39 extern unsigned long Hash_size, Hash_mask; 40 41 extern unsigned int num_tlbcam_entries; 42 #endif 43 44 extern unsigned long ioremap_bot; 45 extern unsigned long __max_low_memory; 46 extern unsigned long __initial_memory_limit; 47 extern unsigned long total_memory; 48 extern unsigned long total_lowmem; 49 50 /* ...and now those things that may be slightly different between processor 51 * architectures. -- Dan 52 */ 53 #if defined(CONFIG_8xx) 54 #define flush_HPTE(X, va, pg) _tlbie(va) 55 #define MMU_init_hw() do { } while(0) 56 #define mmu_mapin_ram() (0UL) 57 58 #elif defined(CONFIG_4xx) 59 #define flush_HPTE(X, va, pg) _tlbie(va) 60 extern void MMU_init_hw(void); 61 extern unsigned long mmu_mapin_ram(void); 62 63 #elif defined(CONFIG_FSL_BOOKE) 64 #define flush_HPTE(X, va, pg) _tlbie(va) 65 extern void MMU_init_hw(void); 66 extern unsigned long mmu_mapin_ram(void); 67 extern void adjust_total_lowmem(void); 68 69 #elif defined(CONFIG_PPC32) 70 /* anything 32-bit except 4xx or 8xx */ 71 extern void MMU_init_hw(void); 72 extern unsigned long mmu_mapin_ram(void); 73 74 /* Be careful....this needs to be updated if we ever encounter 603 SMPs, 75 * which includes all new 82xx processors. We need tlbie/tlbsync here 76 * in that case (I think). -- Dan. 77 */ 78 static inline void flush_HPTE(unsigned context, unsigned long va, 79 unsigned long pdval) 80 { 81 if ((Hash != 0) && 82 cpu_has_feature(CPU_FTR_HPTE_TABLE)) 83 flush_hash_pages(0, va, pdval, 1); 84 else 85 _tlbie(va); 86 } 87 #else /* CONFIG_PPC64 */ 88 /* imalloc region types */ 89 #define IM_REGION_UNUSED 0x1 90 #define IM_REGION_SUBSET 0x2 91 #define IM_REGION_EXISTS 0x4 92 #define IM_REGION_OVERLAP 0x8 93 #define IM_REGION_SUPERSET 0x10 94 95 extern struct vm_struct * im_get_free_area(unsigned long size); 96 extern struct vm_struct * im_get_area(unsigned long v_addr, unsigned long size, 97 int region_type); 98 extern void im_free(void *addr); 99 #endif 100