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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. #ifndef __TLB_H__
  30. #define __TLB_H__
  31.  
  32. #include <arch/mm/asid.h>
  33. #include <arch/types.h>
  34. #include <typedefs.h>
  35.  
  36. /** Type of TLB shootdown message. */
  37. enum tlb_invalidate_type {
  38.     TLB_INVL_INVALID = 0,       /**< Invalid type. */
  39.     TLB_INVL_ALL,           /**< Invalidate all entries in TLB. */
  40.     TLB_INVL_ASID,          /**< Invalidate all entries belonging to one address space. */
  41.     TLB_INVL_PAGES          /**< Invalidate specified page range belonging to one address space. */
  42. };
  43.  
  44. typedef enum tlb_invalidate_type tlb_invalidate_type_t;
  45.  
  46. /** TLB shootdown message. */
  47. struct tlb_shootdown_msg {
  48.     tlb_invalidate_type_t type; /**< Message type. */
  49.     asid_t asid;            /**< Address space identifier. */
  50.     __address page;         /**< Page address. */
  51. };
  52.  
  53. typedef struct tlb_shootdown_msg tlb_shootdown_msg_t;
  54.  
  55. extern void tlb_init(void);
  56.  
  57. #ifdef CONFIG_SMP
  58. extern void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid, __address page, count_t cnt);
  59. extern void tlb_shootdown_finalize(void);
  60. extern void tlb_shootdown_ipi_recv(void);
  61. #else
  62. #  define tlb_shootdown_start(w, x, y, z)
  63. #  define tlb_shootdown_finalize()
  64. #  define tlb_shootdown_ipi_recv()
  65. #endif /* CONFIG_SMP */
  66.  
  67.  
  68. /* Export TLB interface that each architecture must implement. */
  69. extern void tlb_arch_init(void);
  70. extern void tlb_print(void);
  71. extern void tlb_shootdown_ipi_send(void);
  72.  
  73. extern void tlb_invalidate_all(void);
  74. extern void tlb_invalidate_asid(asid_t asid);
  75. extern void tlb_invalidate_pages(asid_t asid, __address page, count_t cnt);
  76. #endif
  77.