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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. /*
  30.  * This is generic interface for managing
  31.  * Address Space IDentifiers (ASIDs).
  32.  */
  33.  
  34. #ifndef __ASID_H__
  35. #define __ASID_H__
  36.  
  37. #include <arch/mm/asid.h>
  38. #include <typedefs.h>
  39.  
  40. #define ASID_KERNEL 0
  41. #define ASID_INVALID    1
  42. #define ASID_START  2
  43. #define ASID_MAX    ASID_MAX_ARCH
  44.  
  45. #define ASIDS_ALLOCABLE ((ASID_MAX+1)-ASID_START)
  46.  
  47. extern spinlock_t asidlock;
  48.  
  49. #ifndef asid_get
  50. extern asid_t asid_get(void);
  51. #endif /* !def asid_get */
  52. extern void asid_put(asid_t asid);
  53.  
  54. #ifndef asid_install
  55. extern void asid_install(as_t *as);
  56. #endif /* !def asid_install */
  57.  
  58. #ifndef asid_find_free
  59. extern asid_t asid_find_free(void);
  60. #endif /* !def asid_find_free */
  61.  
  62. #ifndef asid_put_arch
  63. extern void asid_put_arch(asid_t asid);
  64. #endif /* !def asid_put_arch */
  65.  
  66. #endif
  67.