2 * Copyright (c) 2004 Nate Lawson (SDG)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
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12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 * $FreeBSD: head/sys/dev/acpica/acpi_quirk.c 193530 2009-06-05 18:44:36Z jkim $
29 #include <sys/param.h>
32 #include <contrib/dev/acpica/source/include/acpi.h>
34 #include <dev/acpica/acpivar.h>
51 char sig[ACPI_NAME_SIZE]; /* Table signature to match */
64 const struct acpi_q_rule *match;
68 #include "acpi_quirks.h"
70 static int aq_revcmp(int revision, enum ops_t op, int value);
71 static int aq_strcmp(char *actual, char *possible);
72 static int aq_match_header(ACPI_TABLE_HEADER *hdr,
73 const struct acpi_q_rule *match);
76 aq_revcmp(int revision, enum ops_t op, int value)
80 if (revision <= value)
84 if (revision >= value)
88 if (revision == value)
94 panic("aq_revcmp: invalid op %d", op);
101 aq_strcmp(char *actual, char *possible)
103 if (actual == NULL || possible == NULL)
105 return (strncmp(actual, possible, strlen(possible)) == 0);
109 aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match)
114 switch (match->val) {
116 if (aq_strcmp(hdr->OemId, match->x.id) &&
117 aq_strcmp(hdr->OemTableId, match->y.tid))
121 if (aq_strcmp(hdr->AslCompilerId, match->x.id))
125 if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev))
129 if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev))
138 acpi_table_quirks(int *quirks)
140 const struct acpi_q_entry *entry;
141 const struct acpi_q_rule *match;
142 ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr;
145 /* First, allow the machdep system to set its idea of quirks. */
146 KASSERT(quirks != NULL, ("acpi quirks ptr is NULL"));
147 acpi_machdep_quirks(quirks);
149 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt)))
150 bzero(&fadt, sizeof(fadt));
151 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt)))
152 bzero(&dsdt, sizeof(dsdt));
153 if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt)))
154 bzero(&xsdt, sizeof(xsdt));
156 /* Then, override the quirks with any matched from table signatures. */
157 for (entry = acpi_quirks_table; entry->match; entry++) {
159 for (match = entry->match; match->sig[0] != '\0'; match++) {
160 if (ACPI_COMPARE_NAME(match->sig, "FADT"))
162 else if (ACPI_COMPARE_NAME(match->sig, ACPI_SIG_DSDT))
164 else if (ACPI_COMPARE_NAME(match->sig, ACPI_SIG_XSDT))
167 panic("invalid quirk header\n");
169 /* If we don't match any, skip to the next entry. */
170 if (aq_match_header(hdr, match) == FALSE) {
176 /* If all entries matched, update the quirks and return. */
178 *quirks = entry->quirks;