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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.  * @file    cap.h
  31.  * @brief   Capabilities definitions.
  32.  *
  33.  * Capabilities represent virtual rights that entitle their
  34.  * holder to perform certain security sensitive tasks.
  35.  *
  36.  * Each task can have arbitrary combination of the capabilities
  37.  * defined in this file. Therefore, they are required to be powers
  38.  * of two.
  39.  */
  40.  
  41. #ifndef __CAP_H__
  42. #define __CAP_H__
  43.  
  44. #include <arch/types.h>
  45. #include <typedefs.h>
  46.  
  47. /**
  48.  * CAP_CAP allows its holder to grant/revoke arbitrary
  49.  * privilege to/from other tasks.
  50.  */
  51. #define CAP_CAP         (1<<0)
  52.  
  53. /**
  54.  * CAP_MEM_MANAGER allows its holder to map physical memory
  55.  * to other tasks.
  56.  */
  57. #define CAP_MEM_MANAGER     (1<<1)
  58.  
  59. /**
  60.  * CAP_IO_MANAGER allows its holder to access I/O space
  61.  * to other tasks.
  62.  */
  63. #define CAP_IO_MANAGER      (1<<2)
  64.  
  65. /**
  66.  * CAP_PREEMPT_CONTROL allows its holder to disable interrupts
  67.  */
  68. #define CAP_PREEMPT_CONTROL         (1<<3)
  69.  
  70. typedef __u32 cap_t;
  71.  
  72. extern void cap_set(task_t *t, cap_t caps);
  73. extern cap_t cap_get(task_t *t);
  74.  
  75. #endif
  76.