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 #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 extern void mapin_ram(void);
  79 extern int map_page(unsigned long va, phys_addr_t pa, int flags);
  80 extern void setbat(int index, unsigned long virt, phys_addr_t phys,
  81                    unsigned int size, int flags);
  82 extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
  83                       unsigned int size, int flags, unsigned int pid);
  84 extern void invalidate_tlbcam_entry(int index);
  85
  86 extern int __map_without_bats;
  87 extern unsigned long ioremap_base;
  88 extern unsigned int rtas_data, rtas_size;
  89
  90 struct hash_pte;
  91 extern struct hash_pte *Hash, *Hash_end;
  92 extern unsigned long Hash_size, Hash_mask;
  93
  94 extern unsigned int num_tlbcam_entries;
  95 #endif
  96
  97 extern unsigned long ioremap_bot;
  98 extern unsigned long __max_low_memory;
  99 extern phys_addr_t __initial_memory_limit_addr;
 100 extern phys_addr_t total_memory;
 101 extern phys_addr_t total_lowmem;
 102 extern phys_addr_t memstart_addr;
 103 extern phys_addr_t lowmem_end_addr;
 104
 105 /* ...and now those things that may be slightly different between processor
 106  * architectures.  -- Dan
 107  */
 108 #if defined(CONFIG_8xx)
 109 #define MMU_init_hw()           do { } while(0)
 110 #define mmu_mapin_ram()         (0UL)
 111
 112 #elif defined(CONFIG_4xx)
 113 extern void MMU_init_hw(void);
 114 extern unsigned long mmu_mapin_ram(void);
 115
 116 #elif defined(CONFIG_FSL_BOOKE)
 117 extern void MMU_init_hw(void);
 118 extern unsigned long mmu_mapin_ram(void);
 119 extern void adjust_total_lowmem(void);
 120
 121 #elif defined(CONFIG_PPC32)
 122 /* anything 32-bit except 4xx or 8xx */
 123 extern void MMU_init_hw(void);
 124 extern unsigned long mmu_mapin_ram(void);
 125 #endif