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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. /*
  39.  * ITSB abd DTSB will claim 64K of memory, which
  40.  * is a nice number considered that it is one of
  41.  * the page sizes supported by hardware, which,
  42.  * again, is nice because TSBs need to be locked
  43.  * in TLBs - only one TLB entry will do.
  44.  */
  45. #define TSB_SIZE            2   /* when changing this, change
  46.                          * as.c as well */
  47. #define ITSB_ENTRY_COUNT        (512 * (1 << TSB_SIZE))
  48. #define DTSB_ENTRY_COUNT        (512 * (1 << TSB_SIZE))
  49.  
  50. #define TSB_TAG_TARGET_CONTEXT_SHIFT    48
  51.  
  52. #ifndef __ASM__
  53.  
  54. #include <arch/mm/tte.h>
  55. #include <arch/mm/mmu.h>
  56. #include <arch/types.h>
  57.  
  58. /** TSB Base register. */
  59. typedef union tsb_base_reg {
  60.     uint64_t value;
  61.     struct {
  62.         uint64_t base : 51; /**< TSB base address, bits 63:13. */
  63.         unsigned split : 1; /**< Split vs. common TSB for 8K and 64K
  64.                      * pages. HelenOS uses only 8K pages
  65.                      * for user mappings, so we always set
  66.                      * this to 0.
  67.                      */
  68.         unsigned : 9;
  69.         unsigned size : 3;  /**< TSB size. Number of entries is
  70.                      * 512 * 2^size. */
  71.     } __attribute__ ((packed));
  72. } tsb_base_reg_t;
  73.  
  74. /** Read ITSB Base register.
  75.  *
  76.  * @return Content of the ITSB Base register.
  77.  */
  78. static inline uint64_t itsb_base_read(void)
  79. {
  80.     return asi_u64_read(ASI_IMMU, VA_IMMU_TSB_BASE);
  81. }
  82.  
  83. /** Read DTSB Base register.
  84.  *
  85.  * @return Content of the DTSB Base register.
  86.  */
  87. static inline uint64_t dtsb_base_read(void)
  88. {
  89.     return asi_u64_read(ASI_DMMU, VA_DMMU_TSB_BASE);
  90. }
  91.  
  92. /** Write ITSB Base register.
  93.  *
  94.  * @param v New content of the ITSB Base register.
  95.  */
  96. static inline void itsb_base_write(uint64_t v)
  97. {
  98.     asi_u64_write(ASI_IMMU, VA_IMMU_TSB_BASE, v);
  99. }
  100.  
  101. /** Write DTSB Base register.
  102.  *
  103.  * @param v New content of the DTSB Base register.
  104.  */
  105. static inline void dtsb_base_write(uint64_t v)
  106. {
  107.     asi_u64_write(ASI_DMMU, VA_DMMU_TSB_BASE, v);
  108. }
  109.  
  110. /* Forward declarations. */
  111. struct as;
  112. struct pte;
  113.  
  114. extern void tsb_invalidate(struct as *as, uintptr_t page, count_t pages);
  115. extern void itsb_pte_copy(struct pte *t);
  116. extern void dtsb_pte_copy(struct pte *t, bool ro);
  117.  
  118. #endif /* !def __ASM__ */
  119.  
  120. #endif
  121.  
  122. /** @}
  123.  */
  124.