4 * Check to see if the given machine has a known bad ACPI BIOS
5 * or if the BIOS is too old.
7 * Copyright (C) 2004 Len Brown <len.brown@intel.com>
8 * Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or (at
15 * your option) any later version.
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/acpi.h>
33 #include <acpi/acpi_bus.h>
34 #include <linux/dmi.h>
36 enum acpi_blacklist_predicates {
40 greater_than_or_equal,
43 struct acpi_blacklist_item {
48 enum acpi_blacklist_predicates oem_revision_predicate;
50 u32 is_critical_error;
54 * POLICY: If *anything* doesn't work, put it on the blacklist.
55 * If they are critical errors, mark it critical, and abort driver load.
57 static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
58 /* Compaq Presario 1700 */
59 {"PTLTD ", " DSDT ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
60 "Multiple problems", 1},
61 /* Sony FX120, FX140, FX150? */
62 {"SONY ", "U0 ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
63 "ACPI driver problem", 1},
64 /* Compaq Presario 800, Insyde BIOS */
65 {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
66 "Does not use _REG to protect EC OpRegions", 1},
67 /* IBM 600E - _ADR should return 7, but it returns 1 */
68 {"IBM ", "TP600E ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
74 #if CONFIG_ACPI_BLACKLIST_YEAR
76 static int __init blacklist_by_year(void)
78 int year = dmi_get_year(DMI_BIOS_DATE);
79 /* Doesn't exist? Likely an old system */
81 printk(KERN_ERR PREFIX "no DMI BIOS year, "
82 "acpi=force is required to enable ACPI\n" );
85 /* 0? Likely a buggy new BIOS */
87 printk(KERN_ERR PREFIX "DMI BIOS year==0, "
88 "assuming ACPI-capable machine\n" );
91 if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
92 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
93 "acpi=force is required to enable ACPI\n",
94 year, CONFIG_ACPI_BLACKLIST_YEAR);
100 static inline int blacklist_by_year(void)
106 int __init acpi_blacklisted(void)
110 struct acpi_table_header table_header;
112 while (acpi_blacklist[i].oem_id[0] != '\0') {
113 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
118 if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
124 (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
130 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
131 || (acpi_blacklist[i].oem_revision_predicate ==
133 && table_header.oem_revision <=
134 acpi_blacklist[i].oem_revision)
135 || (acpi_blacklist[i].oem_revision_predicate ==
136 greater_than_or_equal
137 && table_header.oem_revision >=
138 acpi_blacklist[i].oem_revision)
139 || (acpi_blacklist[i].oem_revision_predicate == equal
140 && table_header.oem_revision ==
141 acpi_blacklist[i].oem_revision)) {
143 printk(KERN_ERR PREFIX
144 "Vendor \"%6.6s\" System \"%8.8s\" "
145 "Revision 0x%x has a known ACPI BIOS problem.\n",
146 acpi_blacklist[i].oem_id,
147 acpi_blacklist[i].oem_table_id,
148 acpi_blacklist[i].oem_revision);
150 printk(KERN_ERR PREFIX
151 "Reason: %s. This is a %s error\n",
152 acpi_blacklist[i].reason,
154 is_critical_error ? "non-recoverable" :
157 blacklisted = acpi_blacklist[i].is_critical_error;
164 blacklisted += blacklist_by_year();