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  1. /*
  2.  * Copyright (c) 2001-2004 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 genericmm
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_TLB_H_
  36. #define KERN_TLB_H_
  37.  
  38. #include <arch/mm/asid.h>
  39. #include <arch/types.h>
  40.  
  41. /**
  42.  * Number of TLB shootdown messages that can be queued in processor tlb_messages
  43.  * queue.
  44.  */
  45. #define TLB_MESSAGE_QUEUE_LEN   10
  46.  
  47. /** Type of TLB shootdown message. */
  48. typedef enum {
  49.     /** Invalid type. */
  50.     TLB_INVL_INVALID = 0,
  51.     /** Invalidate all entries in TLB. */
  52.     TLB_INVL_ALL,
  53.     /** Invalidate all entries belonging to one address space. */
  54.     TLB_INVL_ASID,
  55.     /** Invalidate specified page range belonging to one address space. */
  56.     TLB_INVL_PAGES
  57. } tlb_invalidate_type_t;
  58.  
  59. /** TLB shootdown message. */
  60. typedef struct {
  61.     tlb_invalidate_type_t type; /**< Message type. */
  62.     asid_t asid;            /**< Address space identifier. */
  63.     uintptr_t page;         /**< Page address. */
  64.     size_t count;           /**< Number of pages to invalidate. */
  65. } tlb_shootdown_msg_t;
  66.  
  67. extern void tlb_init(void);
  68.  
  69. #ifdef CONFIG_SMP
  70. extern void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid,
  71.     uintptr_t page, size_t count);
  72. extern void tlb_shootdown_finalize(void);
  73. extern void tlb_shootdown_ipi_recv(void);
  74. #else
  75. #define tlb_shootdown_start(w, x, y, z)
  76. #define tlb_shootdown_finalize()
  77. #define tlb_shootdown_ipi_recv()
  78. #endif /* CONFIG_SMP */
  79.  
  80. /* Export TLB interface that each architecture must implement. */
  81. extern void tlb_arch_init(void);
  82. extern void tlb_print(void);
  83. extern void tlb_shootdown_ipi_send(void);
  84.  
  85. extern void tlb_invalidate_all(void);
  86. extern void tlb_invalidate_asid(asid_t asid);
  87. extern void tlb_invalidate_pages(asid_t asid, uintptr_t page, size_t cnt);
  88. #endif
  89.  
  90. /** @}
  91.  */
  92.