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/>
22 struct acpi_table_header
24 char signature [4]; /* ACPI signature (4 ASCII characters) */
25 uint32_t length; /* Length of table, in bytes, including header */
26 uint8_t revision; /* ACPI Specification minor version # */
27 uint8_t checksum; /* To make sum of entire table == 0 */
28 char oem_id [6]; /* OEM identification */
29 char oem_table_id [8]; /* OEM table identification */
30 uint32_t oem_revision; /* OEM revision number */
31 char asl_compiler_id [4]; /* ASL compiler vendor ID */
32 uint32_t asl_compiler_revision; /* ASL compiler revision number */
33 } __attribute__((packed));
36 size_t acpi_tables_len;
38 static int acpi_checksum(const uint8_t *data, int len)
42 for(i = 0; i < len; i++)
47 int acpi_table_add(const char *t)
49 static const char *dfl_id = "QEMUQEMU";
50 char buf[1024], *p, *f;
51 struct acpi_table_header acpi_hdr;
55 memset(&acpi_hdr, 0, sizeof(acpi_hdr));
57 if (get_param_value(buf, sizeof(buf), "sig", t)) {
58 strncpy(acpi_hdr.signature, buf, 4);
60 strncpy(acpi_hdr.signature, dfl_id, 4);
62 if (get_param_value(buf, sizeof(buf), "rev", t)) {
63 val = strtoul(buf, &p, 10);
64 if (val > 255 || *p != '\0')
69 acpi_hdr.revision = (int8_t)val;
71 if (get_param_value(buf, sizeof(buf), "oem_id", t)) {
72 strncpy(acpi_hdr.oem_id, buf, 6);
74 strncpy(acpi_hdr.oem_id, dfl_id, 6);
77 if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) {
78 strncpy(acpi_hdr.oem_table_id, buf, 8);
80 strncpy(acpi_hdr.oem_table_id, dfl_id, 8);
83 if (get_param_value(buf, sizeof(buf), "oem_rev", t)) {
84 val = strtol(buf, &p, 10);
90 acpi_hdr.oem_revision = cpu_to_le32(val);
92 if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) {
93 strncpy(acpi_hdr.asl_compiler_id, buf, 4);
95 strncpy(acpi_hdr.asl_compiler_id, dfl_id, 4);
98 if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) {
99 val = strtol(buf, &p, 10);
105 acpi_hdr.asl_compiler_revision = cpu_to_le32(val);
107 if (!get_param_value(buf, sizeof(buf), "data", t)) {
111 acpi_hdr.length = sizeof(acpi_hdr);
116 char *n = strchr(f, ':');
119 if(stat(f, &s) < 0) {
120 fprintf(stderr, "Can't stat file '%s': %s\n", f, strerror(errno));
123 acpi_hdr.length += s.st_size;
131 acpi_tables_len = sizeof(uint16_t);
132 acpi_tables = qemu_mallocz(acpi_tables_len);
134 p = acpi_tables + acpi_tables_len;
135 acpi_tables_len += sizeof(uint16_t) + acpi_hdr.length;
136 acpi_tables = qemu_realloc(acpi_tables, acpi_tables_len);
138 acpi_hdr.length = cpu_to_le32(acpi_hdr.length);
139 *(uint16_t*)p = acpi_hdr.length;
140 p += sizeof(uint16_t);
141 memcpy(p, &acpi_hdr, sizeof(acpi_hdr));
142 off = sizeof(acpi_hdr);
148 char *n = strchr(f, ':');
151 fd = open(f, O_RDONLY);
155 if(fstat(fd, &s) < 0) {
162 r = read(fd, p + off, s.st_size);
166 } else if ((r < 0 && errno != EINTR) || r == 0) {
178 ((struct acpi_table_header*)p)->checksum = acpi_checksum((uint8_t*)p, off);
179 /* increase number of tables */
180 (*(uint16_t*)acpi_tables) =
181 cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables) + 1);
185 qemu_free(acpi_tables);