1 /*-
2 * Copyright (c) 2004 Nate Lawson (SDG)
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
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * $FreeBSD: releng/5.3/sys/dev/acpica/acpi_quirk.c 131313 2004-06-30 04:45:32Z njl $
27 */
28
29 #include <sys/param.h>
30 #include <sys/bus.h>
31
32 #include "acpi.h"
33 #include <dev/acpica/acpivar.h>
34
35 enum ops_t {
36 OP_NONE,
37 OP_LEQ,
38 OP_GEQ,
39 OP_EQL,
40 };
41
42 enum val_t {
43 OEM,
44 OEM_REV,
45 CREATOR,
46 CREATOR_REV,
47 };
48
49 #define ACPI_TABLE_END (ACPI_TABLE_MAX + 1)
50
51 struct acpi_q_rule {
52 int sig; /* Table signature to match */
53 enum val_t val;
54 union {
55 char *id;
56 enum ops_t op;
57 } x;
58 union {
59 char *tid;
60 int rev;
61 } y;
62 };
63
64 struct acpi_q_entry {
65 const struct acpi_q_rule *match;
66 int quirks;
67 };
68
69 #include "acpi_quirks.h"
70
71 static int aq_revcmp(int revision, enum ops_t op, int value);
72 static int aq_strcmp(char *actual, char *possible);
73 static int aq_match_header(ACPI_TABLE_HEADER *hdr,
74 const struct acpi_q_rule *match);
75
76 static int
77 aq_revcmp(int revision, enum ops_t op, int value)
78 {
79 switch (op) {
80 case OP_LEQ:
81 if (revision <= value)
82 return (TRUE);
83 break;
84 case OP_GEQ:
85 if (revision >= value)
86 return (TRUE);
87 break;
88 case OP_EQL:
89 if (revision == value)
90 return (TRUE);
91 break;
92 case OP_NONE:
93 return (TRUE);
94 default:
95 panic("aq_revcmp: invalid op %d", op);
96 }
97
98 return (FALSE);
99 }
100
101 static int
102 aq_strcmp(char *actual, char *possible)
103 {
104 if (actual == NULL || possible == NULL)
105 return (TRUE);
106 return (strncmp(actual, possible, strlen(possible)) == 0);
107 }
108
109 static int
110 aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match)
111 {
112 int result;
113
114 result = FALSE;
115 switch (match->val) {
116 case OEM:
117 if (aq_strcmp(hdr->OemId, match->x.id) &&
118 aq_strcmp(hdr->OemTableId, match->y.tid))
119 result = TRUE;
120 break;
121 case CREATOR:
122 if (aq_strcmp(hdr->AslCompilerId, match->x.id))
123 result = TRUE;
124 break;
125 case OEM_REV:
126 if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev))
127 result = TRUE;
128 break;
129 case CREATOR_REV:
130 if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev))
131 result = TRUE;
132 break;
133 }
134
135 return (result);
136 }
137
138 int
139 acpi_table_quirks(int *quirks)
140 {
141 const struct acpi_q_entry *entry;
142 const struct acpi_q_rule *match;
143 ACPI_TABLE_HEADER *hdr;
144 int done;
145
146 /* First, allow the machdep system to set its idea of quirks. */
147 KASSERT(quirks != NULL, ("acpi quirks ptr is NULL"));
148 acpi_machdep_quirks(quirks);
149
150 /* Then, override the quirks with any matched from table signatures. */
151 for (entry = acpi_quirks_table; entry->match; entry++) {
152 done = TRUE;
153 for (match = entry->match; match->sig != ACPI_TABLE_END; match++) {
154 switch (match->sig) {
155 case ACPI_TABLE_FADT:
156 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_FADT;
157 break;
158 case ACPI_TABLE_DSDT:
159 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_DSDT;
160 break;
161 case ACPI_TABLE_XSDT:
162 hdr = (ACPI_TABLE_HEADER *)AcpiGbl_XSDT;
163 break;
164 default:
165 panic("invalid quirk header\n");
166 }
167
168 /* If we don't match any, skip to the next entry. */
169 if (!aq_match_header(hdr, match)) {
170 done = FALSE;
171 break;
172 }
173 }
174
175 /* If all entries matched, update the quirks and return. */
176 if (done) {
177 *quirks = entry->quirks;
178 break;
179 }
180 }
181
182 return (0);
183 }
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