source: bootcd/isolinux/syslinux-6.03/com32/gpllib/acpi/xsdt.c @ e16e8f2

Last change on this file since e16e8f2 was e16e8f2, checked in by Edwin Eefting <edwin@datux.nl>, 3 years ago

bootstuff

  • Property mode set to 100644
File size: 2.7 KB
Line 
1/* ----------------------------------------------------------------------- *
2 *
3 *   Copyright 2009-2011 Erwan Velu - All Rights Reserved
4 *
5 *   Permission is hereby granted, free of charge, to any person
6 *   obtaining a copy of this software and associated documentation
7 *   files (the "Software"), to deal in the Software without
8 *   restriction, including without limitation the rights to use,
9 *   copy, modify, merge, publish, distribute, sublicense, and/or
10 *   sell copies of the Software, and to permit persons to whom
11 *   the Software is furnished to do so, subject to the following
12 *   conditions:
13 *
14 *   The above copyright notice and this permission notice shall
15 *   be included in all copies or substantial portions of the Software.
16 *
17 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 *   OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * -----------------------------------------------------------------------
27*/
28
29#include <stdio.h>
30#include <string.h>
31#include <memory.h>
32#include <stdlib.h>
33#include "acpi/acpi.h"
34
35int parse_xsdt(s_acpi * acpi)
36{
37    /* Let's seach for XSDT table */
38    uint8_t *q;
39
40    /* Let's start for the base address */
41    q = acpi->xsdt.address;
42
43    /* If address is null return an error */
44    if (q == 0 ) {
45        DEBUG_PRINT(("XSDT is null, exiting\n"));
46        return -XSDT_TABLE_FOUND;
47    }
48
49    DEBUG_PRINT(("Searching XSDT at %p",q));
50    /* Searching for MADT with APIC signature */
51    if (memcmp(q, XSDT, sizeof(XSDT) - 1) == 0) {
52        s_xsdt *x = &acpi->xsdt;
53        x->valid = true;
54        get_acpi_description_header(q, &x->header);
55        DEBUG_PRINT(("XSDT table found at %p : length=%d\n",x->address,x->header.length));
56        DEBUG_PRINT(("Expected Tables = %d\n",(x->header.length-ACPI_HEADER_SIZE)/8));
57
58        /* We now have a set of pointers to some tables */
59        uint64_t *p = NULL;
60        for (p = ((uint64_t *)(x->address + ACPI_HEADER_SIZE));
61             p < ((uint64_t *)(x->address + x->header.length)); p++) {
62            DEBUG_PRINT((" Looking for HEADER at %p = %x\n",p,*p));
63
64            /* Let's grab the pointed table header */
65            char address[16] = { 0 };
66            sprintf(address, "%llx", *p);
67            uint64_t *pointed_address = (uint64_t *)strtoul(address, NULL, 16);
68
69            x->entry[x->entry_count] = pointed_address;
70            if (parse_header(pointed_address, acpi)) {
71                x->entry_count++;
72            }
73        }
74        return XSDT_TABLE_FOUND;
75    }
76    return -XSDT_TABLE_FOUND;
77}
Note: See TracBrowser for help on using the repository browser.