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- /*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #include <asm/sysreg.h>
- .text
- .global __switch_to
- .type __switch_to, @function
- /* Switch thread context from "prev" to "next", returning "last"
- * r12 : prev
- * r11 : &prev->thread + 1
- * r10 : &next->thread
- */
- __switch_to:
- stm --r11, r0,r1,r2,r3,r4,r5,r6,r7,sp,lr
- mfsr r9, SYSREG_SR
- st.w --r11, r9
- ld.w r8, r10++
- /*
- * schedule() may have been called from a mode with a different
- * set of registers. Make sure we don't lose anything here.
- */
- pushm r10,r12
- mtsr SYSREG_SR, r8
- frs /* flush the return stack */
- sub pc, -2 /* flush the pipeline */
- popm r10,r12
- ldm r10++, r0,r1,r2,r3,r4,r5,r6,r7,sp,pc
- .size __switch_to, . - __switch_to
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