Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * 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 

        .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