4 * Copyright (c) 2006 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License version 2 as published by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, see <http://www.gnu.org/licenses/>
24 struct acpi_table_header
26 char signature
[4]; /* ACPI signature (4 ASCII characters) */
27 uint32_t length
; /* Length of table, in bytes, including header */
28 uint8_t revision
; /* ACPI Specification minor version # */
29 uint8_t checksum
; /* To make sum of entire table == 0 */
30 char oem_id
[6]; /* OEM identification */
31 char oem_table_id
[8]; /* OEM table identification */
32 uint32_t oem_revision
; /* OEM revision number */
33 char asl_compiler_id
[4]; /* ASL compiler vendor ID */
34 uint32_t asl_compiler_revision
; /* ASL compiler revision number */
35 } __attribute__((packed
));
38 size_t acpi_tables_len
;
40 static int acpi_checksum(const uint8_t *data
, int len
)
44 for(i
= 0; i
< len
; i
++)
49 int acpi_table_add(const char *t
)
51 static const char *dfl_id
= "QEMUQEMU";
52 char buf
[1024], *p
, *f
;
53 struct acpi_table_header acpi_hdr
;
57 memset(&acpi_hdr
, 0, sizeof(acpi_hdr
));
59 if (get_param_value(buf
, sizeof(buf
), "sig", t
)) {
60 strncpy(acpi_hdr
.signature
, buf
, 4);
62 strncpy(acpi_hdr
.signature
, dfl_id
, 4);
64 if (get_param_value(buf
, sizeof(buf
), "rev", t
)) {
65 val
= strtoul(buf
, &p
, 10);
66 if (val
> 255 || *p
!= '\0')
71 acpi_hdr
.revision
= (int8_t)val
;
73 if (get_param_value(buf
, sizeof(buf
), "oem_id", t
)) {
74 strncpy(acpi_hdr
.oem_id
, buf
, 6);
76 strncpy(acpi_hdr
.oem_id
, dfl_id
, 6);
79 if (get_param_value(buf
, sizeof(buf
), "oem_table_id", t
)) {
80 strncpy(acpi_hdr
.oem_table_id
, buf
, 8);
82 strncpy(acpi_hdr
.oem_table_id
, dfl_id
, 8);
85 if (get_param_value(buf
, sizeof(buf
), "oem_rev", t
)) {
86 val
= strtol(buf
, &p
, 10);
92 acpi_hdr
.oem_revision
= cpu_to_le32(val
);
94 if (get_param_value(buf
, sizeof(buf
), "asl_compiler_id", t
)) {
95 strncpy(acpi_hdr
.asl_compiler_id
, buf
, 4);
97 strncpy(acpi_hdr
.asl_compiler_id
, dfl_id
, 4);
100 if (get_param_value(buf
, sizeof(buf
), "asl_compiler_rev", t
)) {
101 val
= strtol(buf
, &p
, 10);
107 acpi_hdr
.asl_compiler_revision
= cpu_to_le32(val
);
109 if (!get_param_value(buf
, sizeof(buf
), "data", t
)) {
113 acpi_hdr
.length
= sizeof(acpi_hdr
);
118 char *n
= strchr(f
, ':');
121 if(stat(f
, &s
) < 0) {
122 fprintf(stderr
, "Can't stat file '%s': %s\n", f
, strerror(errno
));
125 acpi_hdr
.length
+= s
.st_size
;
133 acpi_tables_len
= sizeof(uint16_t);
134 acpi_tables
= qemu_mallocz(acpi_tables_len
);
136 p
= acpi_tables
+ acpi_tables_len
;
137 acpi_tables_len
+= sizeof(uint16_t) + acpi_hdr
.length
;
138 acpi_tables
= qemu_realloc(acpi_tables
, acpi_tables_len
);
140 acpi_hdr
.length
= cpu_to_le32(acpi_hdr
.length
);
141 *(uint16_t*)p
= acpi_hdr
.length
;
142 p
+= sizeof(uint16_t);
143 memcpy(p
, &acpi_hdr
, sizeof(acpi_hdr
));
144 off
= sizeof(acpi_hdr
);
150 char *n
= strchr(f
, ':');
153 fd
= open(f
, O_RDONLY
);
157 if(fstat(fd
, &s
) < 0) {
164 r
= read(fd
, p
+ off
, s
.st_size
);
168 } else if ((r
< 0 && errno
!= EINTR
) || r
== 0) {
180 ((struct acpi_table_header
*)p
)->checksum
= acpi_checksum((uint8_t*)p
, off
);
181 /* increase number of tables */
182 (*(uint16_t*)acpi_tables
) =
183 cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables
) + 1);
187 qemu_free(acpi_tables
);