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