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1174 jermar 1
/*
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 * Copyright (C) 2006 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup generic
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 * @{
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 */
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/** @file
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 */
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/**
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 * @file
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 * @brief   Capabilities definitions.
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 *
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 * Capabilities represent virtual rights that entitle their
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 * holder to perform certain security sensitive tasks.
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 *
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 * Each task can have arbitrary combination of the capabilities
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 * defined in this file. Therefore, they are required to be powers
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 * of two.
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 */
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#ifndef __CAP_H__
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#define __CAP_H__
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#include <syscall/sysarg64.h>
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#include <arch/types.h>
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#include <typedefs.h>
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/**
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 * CAP_CAP allows its holder to grant/revoke arbitrary
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 * privilege to/from other tasks.
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 */
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#define CAP_CAP         (1<<0)
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/**
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 * CAP_MEM_MANAGER allows its holder to map physical memory
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 * to other tasks.
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 */
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#define CAP_MEM_MANAGER     (1<<1)
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/**
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 * CAP_IO_MANAGER allows its holder to access I/O space
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 * to other tasks.
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 */
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#define CAP_IO_MANAGER      (1<<2)
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/**
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 * CAP_PREEMPT_CONTROL allows its holder to disable/enable preemption.
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 */
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#define CAP_PREEMPT_CONTROL (1<<3)
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/**
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 * CAP_IRQ_REG entitles its holder to register IRQ handlers.
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 */
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#define CAP_IRQ_REG     (1<<4) 
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typedef uint32_t cap_t;
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extern void cap_set(task_t *t, cap_t caps);
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extern cap_t cap_get(task_t *t);
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extern unative_t sys_cap_grant(sysarg64_t *uspace_taskid_arg, cap_t caps);
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extern unative_t sys_cap_revoke(sysarg64_t *uspace_taskid_arg, cap_t caps);
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#endif
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/** @}
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 */