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biosacpi.c (200357) biosacpi.c (215016)
1/*-
2 * Copyright (c) 2001 Michael Smith <msmith@freebsd.org>
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 * 1. Redistributions of source code must retain the above copyright

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20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 2001 Michael Smith <msmith@freebsd.org>
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 * 1. Redistributions of source code must retain the above copyright

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20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/boot/i386/libi386/biosacpi.c 200357 2009-12-10 14:54:29Z jhb $");
28__FBSDID("$FreeBSD: head/sys/boot/i386/libi386/biosacpi.c 215016 2010-11-08 21:50:45Z jhb $");
29
30#include <stand.h>
31#include <machine/stdarg.h>
32#include <bootstrap.h>
33#include <btxv86.h>
34#include "libi386.h"
35
36#include "platform/acfreebsd.h"
37#include "acconfig.h"
38#define ACPI_SYSTEM_XFACE
39#include "actypes.h"
40#include "actbl.h"
41
42/*
29
30#include <stand.h>
31#include <machine/stdarg.h>
32#include <bootstrap.h>
33#include <btxv86.h>
34#include "libi386.h"
35
36#include "platform/acfreebsd.h"
37#include "acconfig.h"
38#define ACPI_SYSTEM_XFACE
39#include "actypes.h"
40#include "actbl.h"
41
42/*
43 * Detect ACPI and export information about the APCI BIOS into the
43 * Detect ACPI and export information about the ACPI BIOS into the
44 * environment.
45 */
46
47static ACPI_TABLE_RSDP *biosacpi_find_rsdp(void);
48static ACPI_TABLE_RSDP *biosacpi_search_rsdp(char *base, int length);
49
50#define RSDP_CHECKSUM_LENGTH 20
51
52void
53biosacpi_detect(void)
54{
55 ACPI_TABLE_RSDP *rsdp;
56 char buf[24];
57 int revision;
58
44 * environment.
45 */
46
47static ACPI_TABLE_RSDP *biosacpi_find_rsdp(void);
48static ACPI_TABLE_RSDP *biosacpi_search_rsdp(char *base, int length);
49
50#define RSDP_CHECKSUM_LENGTH 20
51
52void
53biosacpi_detect(void)
54{
55 ACPI_TABLE_RSDP *rsdp;
56 char buf[24];
57 int revision;
58
59 /* XXX check the BIOS datestamp */
60
61 /* locate and validate the RSDP */
62 if ((rsdp = biosacpi_find_rsdp()) == NULL)
63 return;
64
65 /* export values from the RSDP */
66 sprintf(buf, "%p", VTOP(rsdp));
67 setenv("hint.acpi.0.rsdp", buf, 1);
68 revision = rsdp->Revision;

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77 setenv("hint.acpi.0.rsdt", buf, 1);
78 if (revision >= 2) {
79 /* XXX extended checksum? */
80 sprintf(buf, "0x%016llx", rsdp->XsdtPhysicalAddress);
81 setenv("hint.acpi.0.xsdt", buf, 1);
82 sprintf(buf, "%d", rsdp->Length);
83 setenv("hint.acpi.0.xsdt_length", buf, 1);
84 }
59 /* locate and validate the RSDP */
60 if ((rsdp = biosacpi_find_rsdp()) == NULL)
61 return;
62
63 /* export values from the RSDP */
64 sprintf(buf, "%p", VTOP(rsdp));
65 setenv("hint.acpi.0.rsdp", buf, 1);
66 revision = rsdp->Revision;

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75 setenv("hint.acpi.0.rsdt", buf, 1);
76 if (revision >= 2) {
77 /* XXX extended checksum? */
78 sprintf(buf, "0x%016llx", rsdp->XsdtPhysicalAddress);
79 setenv("hint.acpi.0.xsdt", buf, 1);
80 sprintf(buf, "%d", rsdp->Length);
81 setenv("hint.acpi.0.xsdt_length", buf, 1);
82 }
85 /* XXX other tables? */
86
87 setenv("acpi_load", "YES", 1);
88}
89
90/*
91 * Find the RSDP in low memory. See section 5.2.2 of the ACPI spec.
92 */
93static ACPI_TABLE_RSDP *
94biosacpi_find_rsdp(void)
95{

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84
85/*
86 * Find the RSDP in low memory. See section 5.2.2 of the ACPI spec.
87 */
88static ACPI_TABLE_RSDP *
89biosacpi_find_rsdp(void)
90{

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