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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.  /** @addtogroup sparc64mm 
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef __sparc64_MMU_H__
  36. #define __sparc64_MMU_H__
  37.  
  38. #include <arch/asm.h>
  39. #include <arch/barrier.h>
  40. #include <arch/types.h>
  41. #include <typedefs.h>
  42.  
  43. /** LSU Control Register ASI. */
  44. #define ASI_LSU_CONTROL_REG     0x45    /**< Load/Store Unit Control Register. */
  45.  
  46. /** I-MMU ASIs. */
  47. #define ASI_IMMU            0x50
  48. #define ASI_IMMU_TSB_8KB_PTR_REG    0x51   
  49. #define ASI_IMMU_TSB_64KB_PTR_REG   0x52
  50. #define ASI_ITLB_DATA_IN_REG        0x54
  51. #define ASI_ITLB_DATA_ACCESS_REG    0x55
  52. #define ASI_ITLB_TAG_READ_REG       0x56
  53. #define ASI_IMMU_DEMAP          0x57
  54.  
  55. /** Virtual Addresses within ASI_IMMU. */
  56. #define VA_IMMU_TAG_TARGET      0x0 /**< IMMU tag target register. */
  57. #define VA_IMMU_SFSR            0x18    /**< IMMU sync fault status register. */
  58. #define VA_IMMU_TSB_BASE        0x28    /**< IMMU TSB base register. */
  59. #define VA_IMMU_TAG_ACCESS      0x30    /**< IMMU TLB tag access register. */
  60.  
  61. /** D-MMU ASIs. */
  62. #define ASI_DMMU            0x58
  63. #define ASI_DMMU_TSB_8KB_PTR_REG    0x59   
  64. #define ASI_DMMU_TSB_64KB_PTR_REG   0x5a
  65. #define ASI_DMMU_TSB_DIRECT_PTR_REG 0x5b
  66. #define ASI_DTLB_DATA_IN_REG        0x5c
  67. #define ASI_DTLB_DATA_ACCESS_REG    0x5d
  68. #define ASI_DTLB_TAG_READ_REG       0x5e
  69. #define ASI_DMMU_DEMAP          0x5f
  70.  
  71. /** Virtual Addresses within ASI_DMMU. */
  72. #define VA_DMMU_TAG_TARGET      0x0 /**< DMMU tag target register. */
  73. #define VA_PRIMARY_CONTEXT_REG      0x8 /**< DMMU primary context register. */
  74. #define VA_SECONDARY_CONTEXT_REG    0x10    /**< DMMU secondary context register. */
  75. #define VA_DMMU_SFSR            0x18    /**< DMMU sync fault status register. */
  76. #define VA_DMMU_SFAR            0x20    /**< DMMU sync fault address register. */
  77. #define VA_DMMU_TSB_BASE        0x28    /**< DMMU TSB base register. */
  78. #define VA_DMMU_TAG_ACCESS      0x30    /**< DMMU TLB tag access register. */
  79. #define VA_DMMU_VA_WATCHPOINT_REG   0x38    /**< DMMU VA data watchpoint register. */
  80. #define VA_DMMU_PA_WATCHPOINT_REG   0x40    /**< DMMU PA data watchpoint register. */
  81.  
  82.  
  83. /** LSU Control Register. */
  84. union lsu_cr_reg {
  85.     __u64 value;
  86.     struct {
  87.         unsigned : 23;
  88.         unsigned pm : 8;
  89.         unsigned vm : 8;
  90.         unsigned pr : 1;
  91.         unsigned pw : 1;
  92.         unsigned vr : 1;
  93.         unsigned vw : 1;
  94.         unsigned : 1;
  95.         unsigned fm : 16;  
  96.         unsigned dm : 1;    /**< D-MMU enable. */
  97.         unsigned im : 1;    /**< I-MMU enable. */
  98.         unsigned dc : 1;    /**< D-Cache enable. */
  99.         unsigned ic : 1;    /**< I-Cache enable. */
  100.        
  101.     } __attribute__ ((packed));
  102. };
  103. typedef union lsu_cr_reg lsu_cr_reg_t;
  104.  
  105.  
  106. #define immu_enable()   immu_set(true)
  107. #define immu_disable()  immu_set(false)
  108. #define dmmu_enable()   dmmu_set(true)
  109. #define dmmu_disable()  dmmu_set(false)
  110.  
  111. /** Disable or Enable IMMU. */
  112. static inline void immu_set(bool enable)
  113. {
  114.     lsu_cr_reg_t cr;
  115.    
  116.     cr.value = asi_u64_read(ASI_LSU_CONTROL_REG, 0);
  117.     cr.im = enable;
  118.     asi_u64_write(ASI_LSU_CONTROL_REG, 0, cr.value);
  119.     membar();
  120. }
  121.  
  122. /** Disable or Enable DMMU. */
  123. static inline void dmmu_set(bool enable)
  124. {
  125.     lsu_cr_reg_t cr;
  126.    
  127.     cr.value = asi_u64_read(ASI_LSU_CONTROL_REG, 0);
  128.     cr.dm = enable;
  129.     asi_u64_write(ASI_LSU_CONTROL_REG, 0, cr.value);
  130.     membar();
  131. }
  132.  
  133. #endif
  134.  
  135.  /** @}
  136.  */
  137.  
  138.