source: mainline/kernel/arch/sparc32/src/proc/scheduler.c@ 32e8cd1

/*
 * Copyright (c) 2013 Jakub Klama
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup sparc32proc
 * @{
 */
/** @file
 */

#include <proc/scheduler.h>
#include <proc/thread.h>
#include <arch.h>
#include <arch/arch.h>

void before_task_runs_arch(void)
{
}

void before_thread_runs_arch(void)
{
        if (THREAD->uspace) {
                uint32_t kernel_sp = (uint32_t) THREAD->kstack + STACK_SIZE - 8;
                uint32_t uspace_wbuf = (uint32_t) THREAD->arch.uspace_window_buffer;
                write_to_invalid(kernel_sp, uspace_wbuf, 0);
        }
}

void after_thread_ran_arch(void)
{
        if (THREAD->uspace) {
                uint32_t kernel_sp;
                uint32_t uspace_wbuf;
                uint32_t l7;
                read_from_invalid(&kernel_sp, &uspace_wbuf, &l7);
                THREAD->arch.uspace_window_buffer = (uint8_t *) uspace_wbuf;
        }
}

/** @}
 */