Subversion Repositories HelenOS-historic

Rev

Rev 727 | Rev 1008 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub 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
 
29
#include <mm/tlb.h>
389 jermar 30
#include <arch/mm/tlb.h>
7 jermar 31
#include <smp/ipi.h>
5 jermar 32
#include <synch/spinlock.h>
33
#include <typedefs.h>
111 palkovsky 34
#include <arch/atomic.h>
7 jermar 35
#include <arch/interrupt.h>
5 jermar 36
#include <config.h>
31 jermar 37
#include <arch.h>
594 jermar 38
#include <panic.h>
1 jermar 39
 
623 jermar 40
SPINLOCK_INITIALIZE(tlblock);
5 jermar 41
 
42
void tlb_init(void)
1 jermar 43
{
569 jermar 44
    tlb_arch_init();
1 jermar 45
}
5 jermar 46
 
458 decky 47
#ifdef CONFIG_SMP
5 jermar 48
/* must be called with interrupts disabled */
727 jermar 49
void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid, __address page, count_t cnt)
5 jermar 50
{
31 jermar 51
    int i;
52
 
53
    CPU->tlb_active = 0;
5 jermar 54
    spinlock_lock(&tlblock);
727 jermar 55
 
56
    /*
740 jermar 57
     * TODO: wrap parameters into a message and
58
     * dispatch it to all CPUs excluding this one.
727 jermar 59
     */
740 jermar 60
 
6 jermar 61
    tlb_shootdown_ipi_send();
727 jermar 62
 
31 jermar 63
busy_wait: 
32 jermar 64
    for (i = 0; i<config.cpu_count; i++)
31 jermar 65
        if (cpus[i].tlb_active)
66
            goto busy_wait;
5 jermar 67
}
68
 
6 jermar 69
void tlb_shootdown_finalize(void)
5 jermar 70
{
71
    spinlock_unlock(&tlblock);
31 jermar 72
    CPU->tlb_active = 1;
5 jermar 73
}
74
 
7 jermar 75
void tlb_shootdown_ipi_send(void)
76
{
77
    ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);
78
}
79
 
6 jermar 80
void tlb_shootdown_ipi_recv(void)
5 jermar 81
{
31 jermar 82
    CPU->tlb_active = 0;
5 jermar 83
    spinlock_lock(&tlblock);
84
    spinlock_unlock(&tlblock);
740 jermar 85
    tlb_invalidate_all();   /* TODO: be more finer-grained in what to invalidate */
31 jermar 86
    CPU->tlb_active = 1;
5 jermar 87
}
458 decky 88
#endif /* CONFIG_SMP */