/*
* Copyright (C) 2005 Jakub Jermar
* 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.
*/
#include <proc/scheduler.h>
#include <cpu.h>
#include <proc/task.h>
#include <proc/thread.h>
#include <arch.h>
#include <arch/context.h> /* SP_DELTA */
#include <arch/debugger.h>
#include <arch/pm.h>
#include <arch/asm.h>
#include <arch/ddi/ddi.h>
/** Perform ia32 specific tasks needed before the new task is run.
*
* Interrupts are disabled.
*/
void before_task_runs_arch(void)
{
io_perm_bitmap_install();
}
/** Perform ia32 specific tasks needed before the new thread is scheduled.
*
* THREAD is locked and interrupts are disabled.
*/
void before_thread_runs_arch(void)
{
CPU->arch.tss->esp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
CPU->arch.tss->ss0 = selector(KDATA_DES);
/* Set up TLS in GS register */
set_tls_desc(THREAD->arch.tls);
#ifdef CONFIG_DEBUG_AS_WATCHPOINT
/* Set watchpoint on AS to ensure that nobody sets it to zero */
if (CPU->id < BKPOINTS_MAX)
breakpoint_add(&((the_t *) THREAD->kstack)->as,
BKPOINT_WRITE | BKPOINT_CHECK_ZERO,
CPU->id);
#endif
}
void after_thread_ran_arch(void)
{
}