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