LXR linux/arch/powerpc/mm/mmu

   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)
  31static inline void _tlbil_all(void)
  32{
  33        asm volatile ("sync; tlbia; isync" : : : "memory");
  34}
  35static 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 */
  42extern void _tlbil_all(void);
  43extern void _tlbil_pid(unsigned int pid);
  44#ifdef CONFIG_PPC_BOOK3E
  45extern 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
  55static 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)
  61extern void _tlbil_va(unsigned long address, unsigned int pid,
  62                      unsigned int tsize, unsigned int ind);
  63#else
  64extern void __tlbil_va(unsigned long address, unsigned int pid);
  65static 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#if defined(CONFIG_PPC_BOOK3E) || defined(CONFIG_PPC_47x)
  73extern void _tlbivax_bcast(unsigned long address, unsigned int pid,
  74                           unsigned int tsize, unsigned int ind);
  75#else
  76static 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
  85extern void hash_preload(struct mm_struct *mm, unsigned long ea,
  86                         unsigned long access, unsigned long trap);
  87
  88
  89extern void _tlbie(unsigned long address);
  90extern void _tlbia(void);
  91
  92#endif /* CONFIG_PPC_MMU_NOHASH */
  93
  94#ifdef CONFIG_PPC32
  95
  96extern void mapin_ram(void);
  97extern int map_page(unsigned long va, phys_addr_t pa, int flags);
  98extern void setbat(int index, unsigned long virt, phys_addr_t phys,
  99                   unsigned int size, int flags);
 100
 101extern int __map_without_bats;
 102extern int __allow_ioremap_reserved;
 103extern unsigned long ioremap_base;
 104extern unsigned int rtas_data, rtas_size;
 105
 106struct hash_pte;
 107extern struct hash_pte *Hash, *Hash_end;
 108extern unsigned long Hash_size, Hash_mask;
 109
 110#endif /* CONFIG_PPC32 */
 111
 112#ifdef CONFIG_PPC64
 113extern int map_kernel_page(unsigned long ea, unsigned long pa, int flags);
 114#endif /* CONFIG_PPC64 */
 115
 116extern unsigned long ioremap_bot;
 117extern unsigned long __max_low_memory;
 118extern phys_addr_t __initial_memory_limit_addr;
 119extern phys_addr_t total_memory;
 120extern phys_addr_t total_lowmem;
 121extern phys_addr_t memstart_addr;
 122extern phys_addr_t lowmem_end_addr;
 123
 124#ifdef CONFIG_WII
 125extern unsigned long wii_hole_start;
 126extern unsigned long wii_hole_size;
 127
 128extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
 129extern 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)
 140extern void MMU_init_hw(void);
 141extern unsigned long mmu_mapin_ram(unsigned long top);
 142
 143#elif defined(CONFIG_PPC_FSL_BOOK3E)
 144extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx);
 145extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
 146                                 phys_addr_t phys);
 147#ifdef CONFIG_PPC32
 148extern void MMU_init_hw(void);
 149extern unsigned long mmu_mapin_ram(unsigned long top);
 150extern void adjust_total_lowmem(void);
 151#endif
 152extern void loadcam_entry(unsigned int index);
 153
 154struct tlbcam {
 155        u32     MAS0;
 156        u32     MAS1;
 157        unsigned long   MAS2;
 158        u32     MAS3;
 159        u32     MAS7;
 160};
 161#elif defined(CONFIG_PPC32)
 162/* anything 32-bit except 4xx or 8xx */
 163extern void MMU_init_hw(void);
 164extern unsigned long mmu_mapin_ram(unsigned long top);
 165#endif
 166