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#
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# Copyright (c) 2007 Petr Stepan
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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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.text   
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.global context_save_arch
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.global context_restore_arch
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context_save_arch:
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	stmfd sp!, {r1}
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	mrs r1, cpsr
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	and r1, r1, #0x1f
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	stmia r0!, {r1}
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	ldmfd sp!, {r1}
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	stmia r0!, {sp, lr}
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	stmia r0!, {r4-r11}
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	mov r0, #1
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	mov pc, lr
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context_restore_arch:
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	ldmia r0!, {r4}
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	mrs r5, cpsr
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	bic r5, r5, #0x1f
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	orr r5, r5, r4
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	msr cpsr_c, r5
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	ldmia r0!, {sp, lr}
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	ldmia r0!, {r4-r11}
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	mov r0, #0
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	mov pc, lr