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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.  /** @addtogroup generic
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. /**
  36.  * @file
  37.  * @brief   Capabilities definitions.
  38.  *
  39.  * Capabilities represent virtual rights that entitle their
  40.  * holder to perform certain security sensitive tasks.
  41.  *
  42.  * Each task can have arbitrary combination of the capabilities
  43.  * defined in this file. Therefore, they are required to be powers
  44.  * of two.
  45.  */
  46.  
  47. #ifndef __CAP_H__
  48. #define __CAP_H__
  49.  
  50. #include <syscall/sysarg64.h>
  51. #include <arch/types.h>
  52. #include <typedefs.h>
  53.  
  54. /**
  55.  * CAP_CAP allows its holder to grant/revoke arbitrary
  56.  * privilege to/from other tasks.
  57.  */
  58. #define CAP_CAP         (1<<0)
  59.  
  60. /**
  61.  * CAP_MEM_MANAGER allows its holder to map physical memory
  62.  * to other tasks.
  63.  */
  64. #define CAP_MEM_MANAGER     (1<<1)
  65.  
  66. /**
  67.  * CAP_IO_MANAGER allows its holder to access I/O space
  68.  * to other tasks.
  69.  */
  70. #define CAP_IO_MANAGER      (1<<2)
  71.  
  72. /**
  73.  * CAP_PREEMPT_CONTROL allows its holder to disable/enable preemption.
  74.  */
  75. #define CAP_PREEMPT_CONTROL (1<<3)
  76.  
  77. /**
  78.  * CAP_IRQ_REG entitles its holder to register IRQ handlers.
  79.  */
  80. #define CAP_IRQ_REG     (1<<4)
  81.  
  82. typedef uint32_t cap_t;
  83.  
  84. extern void cap_set(task_t *t, cap_t caps);
  85. extern cap_t cap_get(task_t *t);
  86.  
  87. extern unative_t sys_cap_grant(sysarg64_t *uspace_taskid_arg, cap_t caps);
  88. extern unative_t sys_cap_revoke(sysarg64_t *uspace_taskid_arg, cap_t caps);
  89.  
  90. #endif
  91.  
  92.  /** @}
  93.  */
  94.  
  95.