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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __sparc64_MMU_H__
  30. #define __sparc64_MMU_H__
  31.  
  32. #include <arch/asm.h>
  33. #include <arch/barrier.h>
  34. #include <arch/types.h>
  35. #include <typedefs.h>
  36.  
  37. /** LSU Control Register ASI. */
  38. #define ASI_LSU_CONTROL_REG     0x45    /**< Load/Store Unit Control Register. */
  39.  
  40. /** I-MMU ASIs. */
  41. #define ASI_IMMU            0x50
  42. #define ASI_IMMU_TSB_8KB_PTR_REG    0x51   
  43. #define ASI_IMMU_TSB_64KB_PTR_REG   0x52
  44. #define ASI_ITLB_DATA_IN_REG        0x54
  45. #define ASI_ITLB_DATA_ACCESS_REG    0x55
  46. #define ASI_ITLB_TAG_READ_REG       0x56
  47. #define ASI_IMMU_DEMAP          0x57
  48.  
  49. /** Virtual Addresses within ASI_IMMU. */
  50. #define VA_IMMU_TAG_TARGET      0x0 /**< IMMU tag target register. */
  51. #define VA_IMMU_SFSR            0x18    /**< IMMU sync fault status register. */
  52. #define VA_IMMU_TSB_BASE        0x28    /**< IMMU TSB base register. */
  53. #define VA_IMMU_TAG_ACCESS      0x30    /**< IMMU TLB tag access register. */
  54.  
  55. /** D-MMU ASIs. */
  56. #define ASI_DMMU            0x58
  57. #define ASI_DMMU_TSB_8KB_PTR_REG    0x59   
  58. #define ASI_DMMU_TSB_64KB_PTR_REG   0x5a
  59. #define ASI_DMMU_TSB_DIRECT_PTR_REG 0x5b
  60. #define ASI_DTLB_DATA_IN_REG        0x5c
  61. #define ASI_DTLB_DATA_ACCESS_REG    0x5d
  62. #define ASI_DTLB_TAG_READ_REG       0x5e
  63. #define ASI_DMMU_DEMAP          0x5f
  64.  
  65. /** Virtual Addresses within ASI_DMMU. */
  66. #define VA_DMMU_TAG_TARGET      0x0 /**< DMMU tag target register. */
  67. #define VA_PRIMARY_CONTEXT_REG      0x8 /**< DMMU primary context register. */
  68. #define VA_SECONDARY_CONTEXT_REG    0x10    /**< DMMU secondary context register. */
  69. #define VA_DMMU_SFSR            0x18    /**< DMMU sync fault status register. */
  70. #define VA_DMMU_SFAR            0x20    /**< DMMU sync fault address register. */
  71. #define VA_DMMU_TSB_BASE        0x28    /**< DMMU TSB base register. */
  72. #define VA_DMMU_TAG_ACCESS      0x30    /**< DMMU TLB tag access register. */
  73. #define VA_DMMU_VA_WATCHPOINT_REG   0x38    /**< DMMU VA data watchpoint register. */
  74. #define VA_DMMU_PA_WATCHPOINT_REG   0x40    /**< DMMU PA data watchpoint register. */
  75.  
  76.  
  77. /** LSU Control Register. */
  78. union lsu_cr_reg {
  79.     __u64 value;
  80.     struct {
  81.         unsigned : 23;
  82.         unsigned pm : 8;
  83.         unsigned vm : 8;
  84.         unsigned pr : 1;
  85.         unsigned pw : 1;
  86.         unsigned vr : 1;
  87.         unsigned vw : 1;
  88.         unsigned : 1;
  89.         unsigned fm : 16;  
  90.         unsigned dm : 1;    /**< D-MMU enable. */
  91.         unsigned im : 1;    /**< I-MMU enable. */
  92.         unsigned dc : 1;    /**< D-Cache enable. */
  93.         unsigned ic : 1;    /**< I-Cache enable. */
  94.        
  95.     } __attribute__ ((packed));
  96. };
  97. typedef union lsu_cr_reg lsu_cr_reg_t;
  98.  
  99.  
  100. #define immu_enable()   immu_set(true)
  101. #define immu_disable()  immu_set(false)
  102. #define dmmu_enable()   dmmu_set(true)
  103. #define dmmu_disable()  dmmu_set(false)
  104.  
  105. /** Disable or Enable IMMU. */
  106. static inline void immu_set(bool enable)
  107. {
  108.     lsu_cr_reg_t cr;
  109.    
  110.     cr.value = asi_u64_read(ASI_LSU_CONTROL_REG, 0);
  111.     cr.im = enable;
  112.     asi_u64_write(ASI_LSU_CONTROL_REG, 0, cr.value);
  113.     membar();
  114. }
  115.  
  116. /** Disable or Enable DMMU. */
  117. static inline void dmmu_set(bool enable)
  118. {
  119.     lsu_cr_reg_t cr;
  120.    
  121.     cr.value = asi_u64_read(ASI_LSU_CONTROL_REG, 0);
  122.     cr.dm = enable;
  123.     asi_u64_write(ASI_LSU_CONTROL_REG, 0, cr.value);
  124.     membar();
  125. }
  126.  
  127. #endif
  128.