Subversion Repositories HelenOS-historic

Rev

Rev 534 | Rev 867 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
191 decky 1
/*
2
 * Copyright (C) 2005 Martin Decky
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 <arch/mm/memory_init.h>
493 jermar 30
#include <genarch/ofw/ofw.h>
191 decky 31
#include <panic.h>
32
 
33
#define MEMMAP_MAX_RECORDS 32
34
 
35
typedef struct {
36
    __u32 start;
37
    __u32 size;
38
} memmap_t;
39
 
40
size_t get_memory_size(void)
41
{
42
    phandle handle = ofw_find_device("/memory");
43
    if (handle == -1)
44
        panic("No RAM\n");
45
 
46
    memmap_t memmap[MEMMAP_MAX_RECORDS];
47
    size_t ret = ofw_get_property(handle, "reg", &memmap, sizeof(memmap));
48
    if (ret == -1)
49
        panic("Device /memory has no reg property\n");
50
 
659 jermar 51
    size_t total = 0;
191 decky 52
    int i;
53
 
54
    for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
55
        if (memmap[i].size == 0)
56
            break;
57
        total += memmap[i].size;
58
    }
59
 
60
    return total;
61
}