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 <stdlib.h>
31#include <string.h>
32#include <memory.h>
33#include <dprintf.h>
34#include "acpi/acpi.h"
35
36int search_rsdp(s_acpi * acpi)
37{
38    /* Let's seach for RSDT table */
39    uint8_t *q;
40
41    /* Let's start for the base address */
42    for (q = (uint8_t *)RSDP_MIN_ADDRESS; q < (uint8_t *)RSDP_MAX_ADDRESS; q+=16 ) {
43	/* Searching for RSDP with "RSD PTR" signature */
44	if (memcmp(q, RSDP, sizeof(RSDP)-1) == 0) {
45	    s_rsdp *r = &acpi->rsdp;
46	    r->valid = true;
47	    r->address = q;
48	    cp_str_struct(r->signature);
49	    cp_struct(&r->checksum);
50	    cp_str_struct(r->oem_id);
51	    cp_struct(&r->revision);
52	    cp_struct(&r->rsdt_address);
53	    cp_struct(&r->length);
54	    cp_struct(&r->xsdt_address);
55	    cp_struct(&r->extended_checksum);
56	    q += 3;		/* reserved field */
57	    acpi->rsdt.address = r->rsdt_address;
58	    acpi->xsdt.address = r->xsdt_address;
59	    DEBUG_PRINT(("RSDT should be at %p\n",r->rsdt_address));
60	    DEBUG_PRINT(("XSDT should be at %p\n",r->xsdt_address));
61	    return RSDP_TABLE_FOUND;
62	}
63    }
64    return -RSDP_TABLE_FOUND;
65}
66
67void print_rsdp(s_acpi * acpi)
68{
69    s_rsdp *r = &acpi->rsdp;
70
71    if (!r->valid)
72	return;
73    printf("RSDP Table @ 0x%p\n", r->address);
74    printf(" signature         : %s\n", r->signature);
75    printf(" checksum          : %u\n", r->checksum);
76    printf(" oem id            : %s\n", r->oem_id);
77    printf(" revision          : %u\n", r->revision);
78    printf(" RDST address      : %p\n", r->rsdt_address);
79    printf(" length            : %u\n", r->length);
80    printf(" XSDT address      : %p\n", r->xsdt_address);
81    printf(" extended checksum : %u\n", r->extended_checksum);
82}
83