arch/arc/include/asm/mmu.h

   1 /*
   2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef _ASM_ARC_MMU_H
  10 #define _ASM_ARC_MMU_H
  11
  12 #if defined(CONFIG_ARC_MMU_V1)
  13 #define CONFIG_ARC_MMU_VER 1
  14 #elif defined(CONFIG_ARC_MMU_V2)
  15 #define CONFIG_ARC_MMU_VER 2
  16 #elif defined(CONFIG_ARC_MMU_V3)
  17 #define CONFIG_ARC_MMU_VER 3
  18 #endif
  19
  20 /* MMU Management regs */
  21 #define ARC_REG_MMU_BCR         0x06f
  22 #define ARC_REG_TLBPD0          0x405
  23 #define ARC_REG_TLBPD1          0x406
  24 #define ARC_REG_TLBINDEX        0x407
  25 #define ARC_REG_TLBCOMMAND      0x408
  26 #define ARC_REG_PID             0x409
  27 #define ARC_REG_SCRATCH_DATA0   0x418
  28
  29 /* Bits in MMU PID register */
  30 #define MMU_ENABLE              (1 << 31)       /* Enable MMU for process */
  31
  32 /* Error code if probe fails */
  33 #define TLB_LKUP_ERR            0x80000000
  34
  35 #define TLB_DUP_ERR     (TLB_LKUP_ERR | 0x00000001)
  36
  37 /* TLB Commands */
  38 #define TLBWrite    0x1
  39 #define TLBRead     0x2
  40 #define TLBGetIndex 0x3
  41 #define TLBProbe    0x4
  42
  43 #if (CONFIG_ARC_MMU_VER >= 2)
  44 #define TLBWriteNI  0x5         /* write JTLB without inv uTLBs */
  45 #define TLBIVUTLB   0x6         /* explicitly inv uTLBs */
  46 #endif
  47
  48 #ifndef __ASSEMBLY__
  49
  50 typedef struct {
  51         unsigned long asid;     /* 8 bit MMU PID + Generation cycle */
  52 } mm_context_t;
  53
  54 #ifdef CONFIG_ARC_DBG_TLB_PARANOIA
  55 void tlb_paranoid_check(unsigned int mm_asid, unsigned long address);
  56 #else
  57 #define tlb_paranoid_check(a, b)
  58 #endif
  59
  60 void arc_mmu_init(void);
  61 extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
  62 void read_decode_mmu_bcr(void);
  63
  64 #endif  /* !__ASSEMBLY__ */
  65
  66 #endif