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/*
* This file is part of the libpayload project.
*
* Copyright 2013 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ARCH_EXCEPTION_H
#define _ARCH_EXCEPTION_H
#include <arch/transition.h>
/* Initialize the exception handling on the current CPU. */
void exception_init(void);
/* Initialize VBAR and SP_EL3. */
void exception_init_asm(void *exception_stack_end);
/*
* Order matters for handling return values. The larger the value the higher
* the precedence.
*/
enum {
EXC_RET_IGNORED,
EXC_RET_ABORT,
EXC_RET_HANDLED,
EXC_RET_HANDLED_DUMP_STATE,
};
struct exception_handler {
int (*handler)(struct exc_state *state, uint64_t vector_id);
struct exception_handler *next;
};
/*
* Register a handler provided with the associated vector id. Returns 0 on
* success, < 0 on error. Note that registration is not thread/interrupt safe.
*/
int exception_handler_register(uint64_t vid, struct exception_handler *h);
/*
* Unregister a handler from the vector id. Return 0 on success, < 0 on error.
* Note that the unregistration is not thread/interrupt safe.
*/
int exception_handler_unregister(uint64_t vid, struct exception_handler *h);
#endif
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