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#
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#
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# Copyright (c) 2006 Martin Decky
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# Copyright (c) 2006 Martin Decky
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# All rights reserved.
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# All rights reserved.
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#
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#
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# Redistribution and use in source and binary forms, with or without
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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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# modification, are permitted provided that the following conditions
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# are met:
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# are met:
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#
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#
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# - Redistributions of source code must retain the above copyright
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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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#   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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# - 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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#   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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#   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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# - 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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#   derived from this software without specific prior written permission.
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#
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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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# 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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# 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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# 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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# 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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# 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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# 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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# 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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# 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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# (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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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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.text
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.text
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.global context_save
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.global context_save
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.global context_restore
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.global context_restore
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#include <libarch/regname.h>
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#include <libarch/regname.h>
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#include <libarch/context_offset.h>
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#include <arch/context_offset.h>
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.macro CONTEXT_STORE r
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	stw sp, OFFSET_SP(\r)
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	stw r2, OFFSET_R2(\r)
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	stw r13, OFFSET_R13(\r)
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	stw r14, OFFSET_R14(\r)
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	stw r15, OFFSET_R15(\r)
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	stw r16, OFFSET_R16(\r)
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	stw r17, OFFSET_R17(\r)
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	stw r18, OFFSET_R18(\r)
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	stw r19, OFFSET_R19(\r)
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	stw r20, OFFSET_R20(\r)
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	stw r21, OFFSET_R21(\r)
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	stw r22, OFFSET_R22(\r)
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	stw r23, OFFSET_R23(\r)
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	stw r24, OFFSET_R24(\r)
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	stw r25, OFFSET_R25(\r)
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	stw r26, OFFSET_R26(\r)
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	stw r27, OFFSET_R27(\r)
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	stw r28, OFFSET_R28(\r)
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	stw r29, OFFSET_R29(\r)
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	stw r30, OFFSET_R30(\r)
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	stw r31, OFFSET_R31(\r)
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.endm
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.macro CONTEXT_LOAD r
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	lwz sp, OFFSET_SP(\r)
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	lwz r2, OFFSET_R2(\r)
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	lwz r13, OFFSET_R13(\r)
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	lwz r14, OFFSET_R14(\r)
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	lwz r15, OFFSET_R15(\r)
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	lwz r16, OFFSET_R16(\r)
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	lwz r17, OFFSET_R17(\r)
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	lwz r18, OFFSET_R18(\r)
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	lwz r19, OFFSET_R19(\r)
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	lwz r20, OFFSET_R20(\r)
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	lwz r21, OFFSET_R21(\r)
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	lwz r22, OFFSET_R22(\r)
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	lwz r23, OFFSET_R23(\r)
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	lwz r24, OFFSET_R24(\r)
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	lwz r25, OFFSET_R25(\r)
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	lwz r26, OFFSET_R26(\r)
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	lwz r27, OFFSET_R27(\r)
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	lwz r28, OFFSET_R28(\r)
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	lwz r29, OFFSET_R29(\r)
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	lwz r30, OFFSET_R30(\r)
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	lwz r31, OFFSET_R31(\r)
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.endm
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context_save:
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context_save:
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	CONTEXT_STORE r3
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	CONTEXT_SAVE_ARCH_CORE r3
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	mflr r4
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	mflr r4
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	stw r4, OFFSET_PC(r3)
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	stw r4, OFFSET_PC(r3)
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	mfcr r4
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	mfcr r4
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	stw r4, OFFSET_CR(r3)
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	stw r4, OFFSET_CR(r3)
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	# context_save returns 1
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	# context_save returns 1
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	li r3, 1
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	li r3, 1
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	blr
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	blr
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context_restore:
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context_restore:
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	CONTEXT_LOAD r3
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	CONTEXT_RESTORE_ARCH_CORE r3
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	lwz r4, OFFSET_CR(r3)
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	lwz r4, OFFSET_CR(r3)
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	mtcr r4
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	mtcr r4
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	lwz r4, OFFSET_PC(r3)
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	lwz r4, OFFSET_PC(r3)
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	mtlr r4
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	mtlr r4
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	# context_restore returns 0
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	# context_restore returns 0
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	li r3, 0
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	li r3, 0
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	blr
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	blr
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