Subversion Repositories HelenOS

Rev

Rev 1854 | Rev 2630 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
22 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Jermar
22 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1854 jermar 29
/** @addtogroup ia32proc
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
22 jermar 35
#include <proc/scheduler.h>
36
#include <cpu.h>
1187 jermar 37
#include <proc/task.h>
22 jermar 38
#include <proc/thread.h>
39
#include <arch.h>
184 jermar 40
#include <arch/context.h>   /* SP_DELTA */
1074 palkovsky 41
#include <arch/debugger.h>
1112 palkovsky 42
#include <arch/pm.h>
1187 jermar 43
#include <arch/asm.h>
1256 jermar 44
#include <arch/ddi/ddi.h>
22 jermar 45
 
1190 jermar 46
/** Perform ia32 specific tasks needed before the new task is run.
1187 jermar 47
 *
1190 jermar 48
 * Interrupts are disabled.
1187 jermar 49
 */
1190 jermar 50
void before_task_runs_arch(void)
22 jermar 51
{
1256 jermar 52
    io_perm_bitmap_install();
1190 jermar 53
}
1187 jermar 54
 
1190 jermar 55
/** Perform ia32 specific tasks needed before the new thread is scheduled.
56
 *
57
 * THREAD is locked and interrupts are disabled.
58
 */
59
void before_thread_runs_arch(void)
60
{
1780 jermar 61
    CPU->arch.tss->esp0 = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
1190 jermar 62
    CPU->arch.tss->ss0 = selector(KDATA_DES);
63
 
64
    /* Set up TLS in GS register */
65
    set_tls_desc(THREAD->arch.tls);
66
 
1074 palkovsky 67
#ifdef CONFIG_DEBUG_AS_WATCHPOINT
68
    /* Set watchpoint on AS to ensure that nobody sets it to zero */
1077 palkovsky 69
    if (CPU->id < BKPOINTS_MAX)
70
        breakpoint_add(&((the_t *) THREAD->kstack)->as,
71
                   BKPOINT_WRITE | BKPOINT_CHECK_ZERO,
72
                   CPU->id);
1074 palkovsky 73
#endif
22 jermar 74
}
897 jermar 75
 
76
void after_thread_ran_arch(void)
77
{
78
}
1702 cejka 79
 
1854 jermar 80
/** @}
1702 cejka 81
 */