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;
54 struct acpi_table_header *acpi_hdr_p;
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 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));
133 acpi_tables_len = sizeof(uint16_t);
134 acpi_tables = qemu_mallocz(acpi_tables_len);
136 acpi_tables = qemu_realloc(acpi_tables,
137 acpi_tables_len + sizeof(uint16_t) + length);
138 p = acpi_tables + acpi_tables_len;
139 acpi_tables_len += sizeof(uint16_t) + length;
141 *(uint16_t*)p = cpu_to_le32(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) {
162 /* off < length is necessary because file size can be changed
164 while(s.st_size && off < length) {
166 r = read(fd, p + off, s.st_size);
170 } else if ((r < 0 && errno != EINTR) || r == 0) {
182 /* don't pass random value in process to guest */
183 memset(p + off, 0, length - off);
186 acpi_hdr_p = (struct acpi_table_header*)p;
187 acpi_hdr_p->length = cpu_to_le32(length);
188 acpi_hdr_p->checksum = acpi_checksum((uint8_t*)p, length);
189 /* increase number of tables */
190 (*(uint16_t*)acpi_tables) =
191 cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables) + 1);
195 qemu_free(acpi_tables);
202 void acpi_pm_tmr_update(ACPIPMTimer *tmr, bool enable)
206 /* schedule a timer interruption if needed */
208 expire_time = muldiv64(tmr->overflow_time, get_ticks_per_sec(),
210 qemu_mod_timer(tmr->timer, expire_time);
212 qemu_del_timer(tmr->timer);
216 void acpi_pm_tmr_calc_overflow_time(ACPIPMTimer *tmr)
218 int64_t d = acpi_pm_tmr_get_clock();
219 tmr->overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
222 uint32_t acpi_pm_tmr_get(ACPIPMTimer *tmr)
224 uint32_t d = acpi_pm_tmr_get_clock();;
228 static void acpi_pm_tmr_timer(void *opaque)
230 ACPIPMTimer *tmr = opaque;
231 tmr->update_sci(tmr);
234 void acpi_pm_tmr_init(ACPIPMTimer *tmr, acpi_update_sci_fn update_sci)
236 tmr->update_sci = update_sci;
237 tmr->timer = qemu_new_timer_ns(vm_clock, acpi_pm_tmr_timer, tmr);
240 void acpi_pm_tmr_reset(ACPIPMTimer *tmr)
242 tmr->overflow_time = 0;
243 qemu_del_timer(tmr->timer);