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 #elif defined(CONFIG_ARC_MMU_V4)
  19 #define CONFIG_ARC_MMU_VER 4
  20 #endif
  21
  22 /* MMU Management regs */
  23 #define ARC_REG_MMU_BCR         0x06f
  24 #if (CONFIG_ARC_MMU_VER < 4)
  25 #define ARC_REG_TLBPD0          0x405
  26 #define ARC_REG_TLBPD1          0x406
  27 #define ARC_REG_TLBINDEX        0x407
  28 #define ARC_REG_TLBCOMMAND      0x408
  29 #define ARC_REG_PID             0x409
  30 #define ARC_REG_SCRATCH_DATA0   0x418
  31 #else
  32 #define ARC_REG_TLBPD0          0x460
  33 #define ARC_REG_TLBPD1          0x461
  34 #define ARC_REG_TLBINDEX        0x464
  35 #define ARC_REG_TLBCOMMAND      0x465
  36 #define ARC_REG_PID             0x468
  37 #define ARC_REG_SCRATCH_DATA0   0x46c
  38 #endif
  39
  40 /* Bits in MMU PID register */
  41 #define __TLB_ENABLE            (1 << 31)
  42 #define __PROG_ENABLE           (1 << 30)
  43 #define MMU_ENABLE              (__TLB_ENABLE | __PROG_ENABLE)
  44
  45 /* Error code if probe fails */
  46 #define TLB_LKUP_ERR            0x80000000
  47
  48 #if (CONFIG_ARC_MMU_VER < 4)
  49 #define TLB_DUP_ERR     (TLB_LKUP_ERR | 0x00000001)
  50 #else
  51 #define TLB_DUP_ERR     (TLB_LKUP_ERR | 0x40000000)
  52 #endif
  53
  54 /* TLB Commands */
  55 #define TLBWrite    0x1
  56 #define TLBRead     0x2
  57 #define TLBGetIndex 0x3
  58 #define TLBProbe    0x4
  59
  60 #if (CONFIG_ARC_MMU_VER >= 2)
  61 #define TLBWriteNI  0x5         /* write JTLB without inv uTLBs */
  62 #define TLBIVUTLB   0x6         /* explicitly inv uTLBs */
  63 #endif
  64
  65 #if (CONFIG_ARC_MMU_VER >= 4)
  66 #define TLBInsertEntry  0x7
  67 #define TLBDeleteEntry  0x8
  68 #endif
  69
  70 #ifndef __ASSEMBLY__
  71
  72 typedef struct {
  73         unsigned long asid[NR_CPUS];    /* 8 bit MMU PID + Generation cycle */
  74 } mm_context_t;
  75
  76 #ifdef CONFIG_ARC_DBG_TLB_PARANOIA
  77 void tlb_paranoid_check(unsigned int mm_asid, unsigned long address);
  78 #else
  79 #define tlb_paranoid_check(a, b)
  80 #endif
  81
  82 void arc_mmu_init(void);
  83 extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
  84 void read_decode_mmu_bcr(void);
  85
  86 #endif  /* !__ASSEMBLY__ */
  87
  88 #endif