mirror of https://gitee.com/openkylin/qemu.git
397 lines
10 KiB
C
397 lines
10 KiB
C
/*
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* ACPI implementation
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*/
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#include "sysemu.h"
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#include "hw.h"
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#include "pc.h"
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#include "acpi.h"
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struct acpi_table_header
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{
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char signature [4]; /* ACPI signature (4 ASCII characters) */
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uint32_t length; /* Length of table, in bytes, including header */
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uint8_t revision; /* ACPI Specification minor version # */
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uint8_t checksum; /* To make sum of entire table == 0 */
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char oem_id [6]; /* OEM identification */
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char oem_table_id [8]; /* OEM table identification */
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uint32_t oem_revision; /* OEM revision number */
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char asl_compiler_id [4]; /* ASL compiler vendor ID */
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uint32_t asl_compiler_revision; /* ASL compiler revision number */
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} __attribute__((packed));
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char *acpi_tables;
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size_t acpi_tables_len;
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static int acpi_checksum(const uint8_t *data, int len)
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{
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int sum, i;
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sum = 0;
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for(i = 0; i < len; i++)
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sum += data[i];
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return (-sum) & 0xff;
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}
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int acpi_table_add(const char *t)
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{
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static const char *dfl_id = "QEMUQEMU";
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char buf[1024], *p, *f;
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struct acpi_table_header acpi_hdr;
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unsigned long val;
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uint32_t length;
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struct acpi_table_header *acpi_hdr_p;
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size_t off;
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memset(&acpi_hdr, 0, sizeof(acpi_hdr));
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if (get_param_value(buf, sizeof(buf), "sig", t)) {
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strncpy(acpi_hdr.signature, buf, 4);
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} else {
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strncpy(acpi_hdr.signature, dfl_id, 4);
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}
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if (get_param_value(buf, sizeof(buf), "rev", t)) {
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val = strtoul(buf, &p, 10);
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if (val > 255 || *p != '\0')
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goto out;
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} else {
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val = 1;
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}
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acpi_hdr.revision = (int8_t)val;
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if (get_param_value(buf, sizeof(buf), "oem_id", t)) {
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strncpy(acpi_hdr.oem_id, buf, 6);
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} else {
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strncpy(acpi_hdr.oem_id, dfl_id, 6);
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}
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if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) {
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strncpy(acpi_hdr.oem_table_id, buf, 8);
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} else {
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strncpy(acpi_hdr.oem_table_id, dfl_id, 8);
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}
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if (get_param_value(buf, sizeof(buf), "oem_rev", t)) {
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val = strtol(buf, &p, 10);
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if(*p != '\0')
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goto out;
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} else {
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val = 1;
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}
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acpi_hdr.oem_revision = cpu_to_le32(val);
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if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) {
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strncpy(acpi_hdr.asl_compiler_id, buf, 4);
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} else {
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strncpy(acpi_hdr.asl_compiler_id, dfl_id, 4);
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}
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if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) {
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val = strtol(buf, &p, 10);
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if(*p != '\0')
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goto out;
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} else {
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val = 1;
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}
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acpi_hdr.asl_compiler_revision = cpu_to_le32(val);
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if (!get_param_value(buf, sizeof(buf), "data", t)) {
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buf[0] = '\0';
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}
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length = sizeof(acpi_hdr);
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f = buf;
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while (buf[0]) {
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struct stat s;
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char *n = strchr(f, ':');
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if (n)
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*n = '\0';
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if(stat(f, &s) < 0) {
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fprintf(stderr, "Can't stat file '%s': %s\n", f, strerror(errno));
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goto out;
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}
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length += s.st_size;
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if (!n)
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break;
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*n = ':';
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f = n + 1;
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}
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if (!acpi_tables) {
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acpi_tables_len = sizeof(uint16_t);
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acpi_tables = qemu_mallocz(acpi_tables_len);
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}
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acpi_tables = qemu_realloc(acpi_tables,
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acpi_tables_len + sizeof(uint16_t) + length);
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p = acpi_tables + acpi_tables_len;
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acpi_tables_len += sizeof(uint16_t) + length;
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*(uint16_t*)p = cpu_to_le32(length);
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p += sizeof(uint16_t);
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memcpy(p, &acpi_hdr, sizeof(acpi_hdr));
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off = sizeof(acpi_hdr);
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f = buf;
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while (buf[0]) {
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struct stat s;
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int fd;
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char *n = strchr(f, ':');
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if (n)
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*n = '\0';
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fd = open(f, O_RDONLY);
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if(fd < 0)
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goto out;
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if(fstat(fd, &s) < 0) {
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close(fd);
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goto out;
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}
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/* off < length is necessary because file size can be changed
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under our foot */
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while(s.st_size && off < length) {
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int r;
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r = read(fd, p + off, s.st_size);
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if (r > 0) {
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off += r;
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s.st_size -= r;
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} else if ((r < 0 && errno != EINTR) || r == 0) {
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close(fd);
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goto out;
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}
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}
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close(fd);
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if (!n)
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break;
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f = n + 1;
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}
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if (off < length) {
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/* don't pass random value in process to guest */
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memset(p + off, 0, length - off);
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}
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acpi_hdr_p = (struct acpi_table_header*)p;
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acpi_hdr_p->length = cpu_to_le32(length);
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acpi_hdr_p->checksum = acpi_checksum((uint8_t*)p, length);
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/* increase number of tables */
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(*(uint16_t*)acpi_tables) =
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cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables) + 1);
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return 0;
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out:
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if (acpi_tables) {
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qemu_free(acpi_tables);
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acpi_tables = NULL;
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}
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return -1;
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}
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/* ACPI PM1a EVT */
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uint16_t acpi_pm1_evt_get_sts(ACPIPM1EVT *pm1, int64_t overflow_time)
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{
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int64_t d = acpi_pm_tmr_get_clock();
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if (d >= overflow_time) {
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pm1->sts |= ACPI_BITMASK_TIMER_STATUS;
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}
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return pm1->sts;
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}
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void acpi_pm1_evt_write_sts(ACPIPM1EVT *pm1, ACPIPMTimer *tmr, uint16_t val)
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{
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uint16_t pm1_sts = acpi_pm1_evt_get_sts(pm1, tmr->overflow_time);
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if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) {
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/* if TMRSTS is reset, then compute the new overflow time */
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acpi_pm_tmr_calc_overflow_time(tmr);
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}
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pm1->sts &= ~val;
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}
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void acpi_pm1_evt_power_down(ACPIPM1EVT *pm1, ACPIPMTimer *tmr)
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{
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if (!pm1) {
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qemu_system_shutdown_request();
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} else if (pm1->en & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
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pm1->sts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
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tmr->update_sci(tmr);
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}
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}
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void acpi_pm1_evt_reset(ACPIPM1EVT *pm1)
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{
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pm1->sts = 0;
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pm1->en = 0;
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}
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/* ACPI PM_TMR */
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void acpi_pm_tmr_update(ACPIPMTimer *tmr, bool enable)
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{
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int64_t expire_time;
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/* schedule a timer interruption if needed */
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if (enable) {
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expire_time = muldiv64(tmr->overflow_time, get_ticks_per_sec(),
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PM_TIMER_FREQUENCY);
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qemu_mod_timer(tmr->timer, expire_time);
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} else {
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qemu_del_timer(tmr->timer);
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}
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}
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void acpi_pm_tmr_calc_overflow_time(ACPIPMTimer *tmr)
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{
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int64_t d = acpi_pm_tmr_get_clock();
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tmr->overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
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}
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uint32_t acpi_pm_tmr_get(ACPIPMTimer *tmr)
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{
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uint32_t d = acpi_pm_tmr_get_clock();;
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return d & 0xffffff;
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}
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static void acpi_pm_tmr_timer(void *opaque)
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{
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ACPIPMTimer *tmr = opaque;
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tmr->update_sci(tmr);
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}
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void acpi_pm_tmr_init(ACPIPMTimer *tmr, acpi_update_sci_fn update_sci)
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{
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tmr->update_sci = update_sci;
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tmr->timer = qemu_new_timer_ns(vm_clock, acpi_pm_tmr_timer, tmr);
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}
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void acpi_pm_tmr_reset(ACPIPMTimer *tmr)
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{
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tmr->overflow_time = 0;
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qemu_del_timer(tmr->timer);
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}
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/* ACPI PM1aCNT */
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void acpi_pm1_cnt_init(ACPIPM1CNT *pm1_cnt, qemu_irq cmos_s3)
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{
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pm1_cnt->cmos_s3 = cmos_s3;
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}
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void acpi_pm1_cnt_write(ACPIPM1EVT *pm1a, ACPIPM1CNT *pm1_cnt, uint16_t val)
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{
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pm1_cnt->cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
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if (val & ACPI_BITMASK_SLEEP_ENABLE) {
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/* change suspend type */
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uint16_t sus_typ = (val >> 10) & 7;
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switch(sus_typ) {
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case 0: /* soft power off */
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qemu_system_shutdown_request();
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break;
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case 1:
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/* ACPI_BITMASK_WAKE_STATUS should be set on resume.
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Pretend that resume was caused by power button */
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pm1a->sts |=
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(ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS);
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qemu_system_reset_request();
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qemu_irq_raise(pm1_cnt->cmos_s3);
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default:
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break;
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}
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}
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}
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void acpi_pm1_cnt_update(ACPIPM1CNT *pm1_cnt,
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bool sci_enable, bool sci_disable)
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{
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/* ACPI specs 3.0, 4.7.2.5 */
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if (sci_enable) {
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pm1_cnt->cnt |= ACPI_BITMASK_SCI_ENABLE;
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} else if (sci_disable) {
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pm1_cnt->cnt &= ~ACPI_BITMASK_SCI_ENABLE;
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}
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}
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void acpi_pm1_cnt_reset(ACPIPM1CNT *pm1_cnt)
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{
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pm1_cnt->cnt = 0;
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if (pm1_cnt->cmos_s3) {
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qemu_irq_lower(pm1_cnt->cmos_s3);
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}
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}
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/* ACPI GPE */
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void acpi_gpe_init(ACPIGPE *gpe, uint8_t len)
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{
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gpe->len = len;
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gpe->sts = qemu_mallocz(len / 2);
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gpe->en = qemu_mallocz(len / 2);
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}
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void acpi_gpe_blk(ACPIGPE *gpe, uint32_t blk)
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{
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gpe->blk = blk;
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}
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void acpi_gpe_reset(ACPIGPE *gpe)
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{
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memset(gpe->sts, 0, gpe->len / 2);
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memset(gpe->en, 0, gpe->len / 2);
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}
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static uint8_t *acpi_gpe_ioport_get_ptr(ACPIGPE *gpe, uint32_t addr)
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{
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uint8_t *cur = NULL;
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if (addr < gpe->len / 2) {
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cur = gpe->sts + addr;
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} else if (addr < gpe->len) {
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cur = gpe->en + addr - gpe->len / 2;
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} else {
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abort();
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}
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return cur;
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}
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void acpi_gpe_ioport_writeb(ACPIGPE *gpe, uint32_t addr, uint32_t val)
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{
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uint8_t *cur;
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addr -= gpe->blk;
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cur = acpi_gpe_ioport_get_ptr(gpe, addr);
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if (addr < gpe->len / 2) {
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/* GPE_STS */
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*cur = (*cur) & ~val;
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} else if (addr < gpe->len) {
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/* GPE_EN */
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*cur = val;
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} else {
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abort();
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}
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}
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uint32_t acpi_gpe_ioport_readb(ACPIGPE *gpe, uint32_t addr)
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{
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uint8_t *cur;
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uint32_t val;
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addr -= gpe->blk;
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cur = acpi_gpe_ioport_get_ptr(gpe, addr);
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val = 0;
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if (cur != NULL) {
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val = *cur;
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}
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return val;
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}
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