Subversion Repositories HelenOS-historic

Rev

Rev 11 | Rev 32 | 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>
7 jermar 30
#include <smp/ipi.h>
5 jermar 31
#include <synch/spinlock.h>
32
#include <typedefs.h>
11 jermar 33
#include <arch/smp/atomic.h>
7 jermar 34
#include <arch/interrupt.h>
5 jermar 35
#include <config.h>
31 jermar 36
#include <arch.h>
1 jermar 37
 
5 jermar 38
#ifdef __SMP__
39
static spinlock_t tlblock;
40
 
41
void tlb_init(void)
1 jermar 42
{
5 jermar 43
    spinlock_initialize(&tlblock);
1 jermar 44
}
5 jermar 45
 
46
/* must be called with interrupts disabled */
6 jermar 47
void tlb_shootdown_start(void)
5 jermar 48
{
31 jermar 49
    int i;
50
 
51
    CPU->tlb_active = 0;
5 jermar 52
    spinlock_lock(&tlblock);
6 jermar 53
    tlb_shootdown_ipi_send();
31 jermar 54
    tlb_invalidate(0); /* TODO: use valid ASID */
5 jermar 55
 
31 jermar 56
busy_wait: 
57
    for (i = 0; i<config.cpu_active; i++)
58
        if (cpus[i].tlb_active)
59
            goto busy_wait;
5 jermar 60
}
61
 
6 jermar 62
void tlb_shootdown_finalize(void)
5 jermar 63
{
64
    spinlock_unlock(&tlblock);
31 jermar 65
    CPU->tlb_active = 1;
5 jermar 66
}
67
 
7 jermar 68
void tlb_shootdown_ipi_send(void)
69
{
70
    ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);
71
}
72
 
6 jermar 73
void tlb_shootdown_ipi_recv(void)
5 jermar 74
{
31 jermar 75
    CPU->tlb_active = 0;
5 jermar 76
    spinlock_lock(&tlblock);
77
    spinlock_unlock(&tlblock);
78
    tlb_invalidate(0);  /* TODO: use valid ASID */
31 jermar 79
    CPU->tlb_active = 1;
5 jermar 80
}
81
#endif /* __SMP__ */