arch/powerpc/mm/mmu_decl.h

   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 #if defined(CONFIG_PPC_BOOK3E) || defined(CONFIG_PPC_47x)
  73 extern void _tlbivax_bcast(unsigned long address, unsigned int pid,
  74                            unsigned int tsize, unsigned int ind);
  75 #else
  76 static 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
  85 extern void hash_preload(struct mm_struct *mm, unsigned long ea,
  86                          unsigned long access, unsigned long trap);
  87
  88
  89 extern void _tlbie(unsigned long address);
  90 extern void _tlbia(void);
  91
  92 #endif /* CONFIG_PPC_MMU_NOHASH */
  93
  94 #ifdef CONFIG_PPC32
  95
  96 extern void mapin_ram(void);
  97 extern int map_page(unsigned long va, phys_addr_t pa, int flags);
  98 extern void setbat(int index, unsigned long virt, phys_addr_t phys,
  99                    unsigned int size, int flags);
 100
 101 extern int __map_without_bats;
 102 extern int __allow_ioremap_reserved;
 103 extern unsigned long ioremap_base;
 104 extern unsigned int rtas_data, rtas_size;
 105
 106 struct hash_pte;
 107 extern struct hash_pte *Hash, *Hash_end;
 108 extern unsigned long Hash_size, Hash_mask;
 109
 110 #endif /* CONFIG_PPC32 */
 111
 112 #ifdef CONFIG_PPC64
 113 extern int map_kernel_page(unsigned long ea, unsigned long pa, int flags);
 114 #endif /* CONFIG_PPC64 */
 115
 116 extern unsigned long ioremap_bot;
 117 extern unsigned long __max_low_memory;
 118 extern phys_addr_t __initial_memory_limit_addr;
 119 extern phys_addr_t total_memory;
 120 extern phys_addr_t total_lowmem;
 121 extern phys_addr_t memstart_addr;
 122 extern phys_addr_t lowmem_end_addr;
 123
 124 #ifdef CONFIG_WII
 125 extern unsigned long wii_hole_start;
 126 extern unsigned long wii_hole_size;
 127
 128 extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
 129 extern 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)
 140 extern void MMU_init_hw(void);
 141 extern unsigned long mmu_mapin_ram(unsigned long top);
 142
 143 #elif defined(CONFIG_PPC_FSL_BOOK3E)
 144 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx);
 145 extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
 146                                  phys_addr_t phys);
 147 #ifdef CONFIG_PPC32
 148 extern void MMU_init_hw(void);
 149 extern unsigned long mmu_mapin_ram(unsigned long top);
 150 extern void adjust_total_lowmem(void);
 151 extern int switch_to_as1(void);
 152 extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu);
 153 #endif
 154 extern void loadcam_entry(unsigned int index);
 155
 156 struct tlbcam {
 157         u32     MAS0;
 158         u32     MAS1;
 159         unsigned long   MAS2;
 160         u32     MAS3;
 161         u32     MAS7;
 162 };
 163 #elif defined(CONFIG_PPC32)
 164 /* anything 32-bit except 4xx or 8xx */
 165 extern void MMU_init_hw(void);
 166 extern unsigned long mmu_mapin_ram(unsigned long top);
 167 #endif