Subversion Repositories HelenOS-historic

Rev

Rev 548 | Rev 576 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
219 palkovsky 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
 
540 jermar 29
#include <arch/mm/page.h>
30
#include <arch/mm/frame.h>
219 palkovsky 31
#include <mm/page.h>
226 palkovsky 32
#include <mm/frame.h>
33
#include <arch/interrupt.h>
34
#include <arch/asm.h>
35
#include <config.h>
36
#include <memstr.h>
37
 
566 palkovsky 38
static __address bootstrap_dba;
226 palkovsky 39
 
219 palkovsky 40
void page_arch_init(void)
41
{
226 palkovsky 42
    __address dba;
540 jermar 43
    __address cur;
226 palkovsky 44
 
45
    if (config.cpu_active == 1) {
548 jermar 46
        dba = frame_alloc(FRAME_KA | FRAME_PANIC, ONE_FRAME);
226 palkovsky 47
        memsetb(dba, PAGE_SIZE, 0);
48
 
49
        bootstrap_dba = dba;
50
 
51
        /*
52
         * PA2KA(identity) mapping for all frames.
53
         */
540 jermar 54
        for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
55
            page_mapping_insert(PA2KA(cur), cur, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba));
226 palkovsky 56
        }
57
 
58
        trap_register(14, page_fault);
59
        write_cr3(KA2PA(dba));
60
    }
61
    else {
566 palkovsky 62
        write_cr3(KA2PA(bootstrap_dba));
226 palkovsky 63
    }
219 palkovsky 64
}