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 extern void hash_preload(struct mm_struct *mm, unsigned long ea,
  26                          unsigned long access, unsigned long trap);
  27
  28
  29 #ifdef CONFIG_PPC32
  30 extern void mapin_ram(void);
  31 extern int map_page(unsigned long va, phys_addr_t pa, int flags);
  32 extern void setbat(int index, unsigned long virt, unsigned long phys,
  33                    unsigned int size, int flags);
  34 extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
  35                       unsigned int size, int flags, unsigned int pid);
  36 extern void invalidate_tlbcam_entry(int index);
  37
  38 extern int __map_without_bats;
  39 extern unsigned long ioremap_base;
  40 extern unsigned int rtas_data, rtas_size;
  41
  42 struct hash_pte;
  43 extern struct hash_pte *Hash, *Hash_end;
  44 extern unsigned long Hash_size, Hash_mask;
  45
  46 extern unsigned int num_tlbcam_entries;
  47 #endif
  48
  49 extern unsigned long ioremap_bot;
  50 extern unsigned long __max_low_memory;
  51 extern unsigned long __initial_memory_limit;
  52 extern unsigned long total_memory;
  53 extern unsigned long total_lowmem;
  54
  55 /* ...and now those things that may be slightly different between processor
  56  * architectures.  -- Dan
  57  */
  58 #if defined(CONFIG_8xx)
  59 #define flush_HPTE(X, va, pg)   _tlbie(va, 0 /* 8xx doesn't care about PID */)
  60 #define MMU_init_hw()           do { } while(0)
  61 #define mmu_mapin_ram()         (0UL)
  62
  63 #elif defined(CONFIG_4xx)
  64 #define flush_HPTE(pid, va, pg) _tlbie(va, pid)
  65 extern void MMU_init_hw(void);
  66 extern unsigned long mmu_mapin_ram(void);
  67
  68 #elif defined(CONFIG_FSL_BOOKE)
  69 #define flush_HPTE(pid, va, pg) _tlbie(va, pid)
  70 extern void MMU_init_hw(void);
  71 extern unsigned long mmu_mapin_ram(void);
  72 extern void adjust_total_lowmem(void);
  73
  74 #elif defined(CONFIG_PPC32)
  75 /* anything 32-bit except 4xx or 8xx */
  76 extern void MMU_init_hw(void);
  77 extern unsigned long mmu_mapin_ram(void);
  78
  79 /* Be careful....this needs to be updated if we ever encounter 603 SMPs,
  80  * which includes all new 82xx processors.  We need tlbie/tlbsync here
  81  * in that case (I think). -- Dan.
  82  */
  83 static inline void flush_HPTE(unsigned context, unsigned long va,
  84                               unsigned long pdval)
  85 {
  86         if ((Hash != 0) &&
  87             cpu_has_feature(CPU_FTR_HPTE_TABLE))
  88                 flush_hash_pages(0, va, pdval, 1);
  89         else
  90                 _tlbie(va);
  91 }
  92 #endif