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  1. /*
  2.  * Copyright (C) 2006 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 KERN_sparc64_TSB_H_
  36. #define KERN_sparc64_TSB_H_
  37.  
  38. #include <arch/mm/tte.h>
  39. #include <arch/mm/mmu.h>
  40. #include <arch/types.h>
  41. #include <typedefs.h>
  42.  
  43. /*
  44.  * ITSB abd DTSB will claim 64K of memory, which
  45.  * is a nice number considered that it is one of
  46.  * the page sizes supported by hardware, which,
  47.  * again, is nice because TSBs need to be locked
  48.  * in TLBs - only one TLB entry will do.
  49.  */
  50. #define TSB_SIZE            2           /* when changing this, change as.c as well */
  51. #define ITSB_ENTRY_COUNT        (512*(1<<TSB_SIZE))
  52. #define DTSB_ENTRY_COUNT        (512*(1<<TSB_SIZE))
  53.  
  54. struct tsb_entry {
  55.     tte_tag_t tag;
  56.     tte_data_t data;
  57. } __attribute__ ((packed));
  58. typedef struct tsb_entry tsb_entry_t;
  59.  
  60. /** TSB Base register. */
  61. union tsb_base_reg {
  62.     uint64_t value;
  63.     struct {
  64.         uint64_t base : 51; /**< TSB base address, bits 63:13. */
  65.         unsigned split : 1; /**< Split vs. common TSB for 8K and 64K pages.
  66.                       *  HelenOS uses only 8K pages for user mappings,
  67.                       *  so we always set this to 0.
  68.                       */
  69.         unsigned : 9;
  70.         unsigned size : 3;  /**< TSB size. Number of entries is 512*2^size. */
  71.     } __attribute__ ((packed));
  72. };
  73. typedef union tsb_base_reg tsb_base_reg_t;
  74.  
  75. /** Read ITSB Base register.
  76.  *
  77.  * @return Content of the ITSB Base register.
  78.  */
  79. static inline uint64_t itsb_base_read(void)
  80. {
  81.     return asi_u64_read(ASI_IMMU, VA_IMMU_TSB_BASE);
  82. }
  83.  
  84. /** Read DTSB Base register.
  85.  *
  86.  * @return Content of the DTSB Base register.
  87.  */
  88. static inline uint64_t dtsb_base_read(void)
  89. {
  90.     return asi_u64_read(ASI_DMMU, VA_DMMU_TSB_BASE);
  91. }
  92.  
  93. /** Write ITSB Base register.
  94.  *
  95.  * @param v New content of the ITSB Base register.
  96.  */
  97. static inline void itsb_base_write(uint64_t v)
  98. {
  99.     asi_u64_write(ASI_IMMU, VA_IMMU_TSB_BASE, v);
  100. }
  101.  
  102. /** Write DTSB Base register.
  103.  *
  104.  * @param v New content of the DTSB Base register.
  105.  */
  106. static inline void dtsb_base_write(uint64_t v)
  107. {
  108.     asi_u64_write(ASI_DMMU, VA_DMMU_TSB_BASE, v);
  109. }
  110.  
  111. extern void tsb_invalidate(as_t *as, uintptr_t page, count_t pages);
  112.  
  113. #endif
  114.  
  115. /** @}
  116.  */
  117.