context.h

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00001 /*
00002  * Copyright (C) 2001-2004 Jakub Jermar
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00035 #ifndef __CONTEXT_H__
00036 #define __CONTEXT_H__
00037 
00038 #include <arch/types.h>
00039 #include <typedefs.h>
00040 #include <arch/context.h>
00041 
00042 
00043 #ifndef context_set
00044 #define context_set(c, _pc, stack, size)        \
00045         (c)->pc = (__address) (_pc);            \
00046         (c)->sp = ((__address) (stack)) + (size) - SP_DELTA;
00047 #endif /* context_set */
00048 
00049 extern int context_save_arch(context_t *c);
00050 extern void context_restore_arch(context_t *c) __attribute__ ((noreturn));
00051 
00068 #define context_save(c)   context_save_arch(c)
00069 
00086 static inline void context_restore(context_t *c)
00087 {
00088         context_restore_arch(c);
00089 }
00090 
00091 #endif
00092 

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