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#
# Copyright (c) 2005 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - 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.
# - 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 ``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 BE LIABLE FOR ANY DIRECT, INDIRECT,
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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#

#include <arch/context_offset.h>

.text   

.global context_save_arch
.global context_restore_arch

context_save_arch:
    CONTEXT_SAVE_ARCH_CORE r3
    
    mflr r4
    stw r4, OFFSET_PC(r3)
    
    mfcr r4
    stw r4, OFFSET_CR(r3)
    
    # context_save returns 1
    li r3, 1
    blr
    
context_restore_arch:
    CONTEXT_RESTORE_ARCH_CORE r3
    
    lwz r4, OFFSET_CR(r3)
    mtcr r4
    
    lwz r4, OFFSET_PC(r3)
    mtlr r4
    
    # context_restore returns 0
    li r3, 0
    blr