| 1 | /*
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| 2 | * Copyright (C) 2006 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /**
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| 30 | * @file cap.h
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| 31 | * @brief Capabilities definitions.
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| 32 | *
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| 33 | * Capabilities represent virtual rights that entitle their
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| 34 | * holder to perform certain security sensitive tasks.
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| 35 | *
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| 36 | * Each task can have arbitrary combination of the capabilities
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| 37 | * defined in this file. Therefore, they are required to be powers
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| 38 | * of two.
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| 39 | */
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| 40 |
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| 41 | #ifndef __CAP_H__
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| 42 | #define __CAP_H__
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| 43 |
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| 44 | #include <arch/types.h>
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| 45 | #include <typedefs.h>
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| 46 |
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| 47 | /**
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| 48 | * CAP_CAP allows its holder to grant/revoke arbitrary
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| 49 | * privilege to/from other tasks.
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| 50 | */
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| 51 | #define CAP_CAP (1<<0)
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| 52 |
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| 53 | /**
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| 54 | * CAP_MEM_MANAGER allows its holder to map physical memory
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| 55 | * to other tasks.
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| 56 | */
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| 57 | #define CAP_MEM_MANAGER (1<<1)
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| 58 |
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| 59 | /**
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| 60 | * CAP_IO_MANAGER allows its holder to access I/O space
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| 61 | * to other tasks.
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| 62 | */
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| 63 | #define CAP_IO_MANAGER (1<<2)
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| 64 |
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| 65 | /**
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| 66 | * CAP_PREEMPT_CONTROL allows its holder to disable interrupts
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| 67 | */
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| 68 | #define CAP_PREEMPT_CONTROL (1<<3)
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| 69 |
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| 70 | typedef __u32 cap_t;
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| 71 |
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| 72 | extern void cap_set(task_t *t, cap_t caps);
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| 73 | extern cap_t cap_get(task_t *t);
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| 74 |
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| 75 | #endif
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