57 lines
1.6 KiB
ArmAsm
57 lines
1.6 KiB
ArmAsm
/*
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* Copyright (c) 2010 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <asm.h>
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/* context switch frame:
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vaddr_t r0;
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vaddr_t r1;
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vaddr_t r2;
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vaddr_t r3;
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vaddr_t r4;
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vaddr_t r5;
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vaddr_t r6;
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vaddr_t r7;
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vaddr_t r8;
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vaddr_t r9;
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vaddr_t sr;
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vaddr_t lr;
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*/
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/* void avr32_context_switch(addr_t *old_sp, addr_t new_sp); */
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FUNCTION(avr32_context_switch)
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/* save old state, including SR */
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mfsr r10, 0
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pushm r0-r10,lr
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/* save old sp */
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st.w r12[0], sp
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/* load new one */
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mov sp, r11
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/* restore state and exit */
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popm r0-r10,lr
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mtsr 0, r10
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ret r12
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