/* * 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "vl.h" //#define DEBUG /* i82731AB (PIIX4) compatible power management function */ #define PM_FREQ 3579545 /* XXX: make them variable */ #define PM_IO_BASE 0xb000 #define SMI_CMD_IO_ADDR 0xb040 #define ACPI_DBG_IO_ADDR 0xb044 typedef struct PIIX4PMState { PCIDevice dev; uint16_t pmsts; uint16_t pmen; uint16_t pmcntrl; QEMUTimer *tmr_timer; int64_t tmr_overflow_time; } PIIX4PMState; #define RTC_EN (1 << 10) #define PWRBTN_EN (1 << 8) #define GBL_EN (1 << 5) #define TMROF_EN (1 << 0) #define SCI_EN (1 << 0) #define SUS_EN (1 << 13) /* Note: only used for ACPI bios init. Could be deleted when ACPI init is integrated in Bochs BIOS */ static PIIX4PMState *piix4_pm_state; static uint32_t get_pmtmr(PIIX4PMState *s) { uint32_t d; d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); return d & 0xffffff; } static int get_pmsts(PIIX4PMState *s) { int64_t d; int pmsts; pmsts = s->pmsts; d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); if (d >= s->tmr_overflow_time) s->pmsts |= TMROF_EN; return pmsts; } static void pm_update_sci(PIIX4PMState *s) { int sci_level, pmsts; int64_t expire_time; pmsts = get_pmsts(s); sci_level = (((pmsts & s->pmen) & (RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0); pci_set_irq(&s->dev, 0, sci_level); /* schedule a timer interruption if needed */ if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) { expire_time = muldiv64(s->tmr_overflow_time, ticks_per_sec, PM_FREQ); qemu_mod_timer(s->tmr_timer, expire_time); } else { qemu_del_timer(s->tmr_timer); } } static void pm_tmr_timer(void *opaque) { PIIX4PMState *s = opaque; pm_update_sci(s); } static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val) { PIIX4PMState *s = opaque; addr &= 0x3f; switch(addr) { case 0x00: { int64_t d; int pmsts; pmsts = get_pmsts(s); if (pmsts & val & TMROF_EN) { /* if TMRSTS is reset, then compute the new overflow time */ d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL; } s->pmsts &= ~val; pm_update_sci(s); } break; case 0x02: s->pmen = val; pm_update_sci(s); break; case 0x04: { int sus_typ; s->pmcntrl = val & ~(SUS_EN); if (val & SUS_EN) { /* change suspend type */ sus_typ = (val >> 10) & 3; switch(sus_typ) { case 0: /* soft power off */ qemu_system_shutdown_request(); break; default: break; } } } break; default: break; } #ifdef DEBUG printf("PM writew port=0x%04x val=0x%04x\n", addr, val); #endif } static uint32_t pm_ioport_readw(void *opaque, uint32_t addr) { PIIX4PMState *s = opaque; uint32_t val; addr &= 0x3f; switch(addr) { case 0x00: val = get_pmsts(s); break; case 0x02: val = s->pmen; break; case 0x04: val = s->pmcntrl; break; default: val = 0; break; } #ifdef DEBUG printf("PM readw port=0x%04x val=0x%04x\n", addr, val); #endif return val; } static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val) { // PIIX4PMState *s = opaque; addr &= 0x3f; #ifdef DEBUG printf("PM writel port=0x%04x val=0x%08x\n", addr, val); #endif } static uint32_t pm_ioport_readl(void *opaque, uint32_t addr) { PIIX4PMState *s = opaque; uint32_t val; addr &= 0x3f; switch(addr) { case 0x08: val = get_pmtmr(s); break; default: val = 0; break; } #ifdef DEBUG printf("PM readl port=0x%04x val=0x%08x\n", addr, val); #endif return val; } static void smi_cmd_writeb(void *opaque, uint32_t addr, uint32_t val) { PIIX4PMState *s = opaque; #ifdef DEBUG printf("SMI cmd val=0x%02x\n", val); #endif switch(val) { case 0xf0: /* ACPI disable */ s->pmcntrl &= ~SCI_EN; break; case 0xf1: /* ACPI enable */ s->pmcntrl |= SCI_EN; break; } } static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val) { #if defined(DEBUG) printf("ACPI: DBG: 0x%08x\n", val); #endif } /* XXX: we still add it to the PIIX3 and we count on the fact that OSes are smart enough to accept this strange configuration */ void piix4_pm_init(PCIBus *bus, int devfn) { PIIX4PMState *s; uint8_t *pci_conf; uint32_t pm_io_base; s = (PIIX4PMState *)pci_register_device(bus, "PM", sizeof(PIIX4PMState), devfn, NULL, NULL); pci_conf = s->dev.config; pci_conf[0x00] = 0x86; pci_conf[0x01] = 0x80; pci_conf[0x02] = 0x13; pci_conf[0x03] = 0x71; pci_conf[0x08] = 0x00; // revision number pci_conf[0x09] = 0x00; pci_conf[0x0a] = 0x80; // other bridge device pci_conf[0x0b] = 0x06; // bridge device pci_conf[0x0e] = 0x00; // header_type pci_conf[0x3d] = 0x01; // interrupt pin 1 pci_conf[0x60] = 0x10; // release number pm_io_base = PM_IO_BASE; pci_conf[0x40] = pm_io_base | 1; pci_conf[0x41] = pm_io_base >> 8; register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s); register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s); register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s); register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s); register_ioport_write(SMI_CMD_IO_ADDR, 1, 1, smi_cmd_writeb, s); register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s); s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s); piix4_pm_state = s; } /* ACPI tables */ /* XXX: move them in the Bochs BIOS ? */ /*************************************************/ /* Table structure from Linux kernel (the ACPI tables are under the BSD license) */ #define ACPI_TABLE_HEADER_DEF /* ACPI common table header */ \ uint8_t 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 */\ uint8_t oem_id [6]; /* OEM identification */\ uint8_t oem_table_id [8]; /* OEM table identification */\ uint32_t oem_revision; /* OEM revision number */\ uint8_t asl_compiler_id [4]; /* ASL compiler vendor ID */\ uint32_t asl_compiler_revision; /* ASL compiler revision number */ struct acpi_table_header /* ACPI common table header */ { ACPI_TABLE_HEADER_DEF }; struct rsdp_descriptor /* Root System Descriptor Pointer */ { uint8_t signature [8]; /* ACPI signature, contains "RSD PTR " */ uint8_t checksum; /* To make sum of struct == 0 */ uint8_t oem_id [6]; /* OEM identification */ uint8_t revision; /* Must be 0 for 1.0, 2 for 2.0 */ uint32_t rsdt_physical_address; /* 32-bit physical address of RSDT */ uint32_t length; /* XSDT Length in bytes including hdr */ uint64_t xsdt_physical_address; /* 64-bit physical address of XSDT */ uint8_t extended_checksum; /* Checksum of entire table */ uint8_t reserved [3]; /* Reserved field must be 0 */ }; /* * ACPI 1.0 Root System Description Table (RSDT) */ struct rsdt_descriptor_rev1 { ACPI_TABLE_HEADER_DEF /* ACPI common table header */ uint32_t table_offset_entry [2]; /* Array of pointers to other */ /* ACPI tables */ }; /* * ACPI 1.0 Firmware ACPI Control Structure (FACS) */ struct facs_descriptor_rev1 { uint8_t signature[4]; /* ACPI Signature */ uint32_t length; /* Length of structure, in bytes */ uint32_t hardware_signature; /* Hardware configuration signature */ uint32_t firmware_waking_vector; /* ACPI OS waking vector */ uint32_t global_lock; /* Global Lock */ uint32_t S4bios_f : 1; /* Indicates if S4BIOS support is present */ uint32_t reserved1 : 31; /* Must be 0 */ uint8_t resverved3 [40]; /* Reserved - must be zero */ }; /* * ACPI 1.0 Fixed ACPI Description Table (FADT) */ struct fadt_descriptor_rev1 { ACPI_TABLE_HEADER_DEF /* ACPI common table header */ uint32_t firmware_ctrl; /* Physical address of FACS */ uint32_t dsdt; /* Physical address of DSDT */ uint8_t model; /* System Interrupt Model */ uint8_t reserved1; /* Reserved */ uint16_t sci_int; /* System vector of SCI interrupt */ uint32_t smi_cmd; /* Port address of SMI command port */ uint8_t acpi_enable; /* Value to write to smi_cmd to enable ACPI */ uint8_t acpi_disable; /* Value to write to smi_cmd to disable ACPI */ uint8_t S4bios_req; /* Value to write to SMI CMD to enter S4BIOS state */ uint8_t reserved2; /* Reserved - must be zero */ uint32_t pm1a_evt_blk; /* Port address of Power Mgt 1a acpi_event Reg Blk */ uint32_t pm1b_evt_blk; /* Port address of Power Mgt 1b acpi_event Reg Blk */ uint32_t pm1a_cnt_blk; /* Port address of Power Mgt 1a Control Reg Blk */ uint32_t pm1b_cnt_blk; /* Port address of Power Mgt 1b Control Reg Blk */ uint32_t pm2_cnt_blk; /* Port address of Power Mgt 2 Control Reg Blk */ uint32_t pm_tmr_blk; /* Port address of Power Mgt Timer Ctrl Reg Blk */ uint32_t gpe0_blk; /* Port addr of General Purpose acpi_event 0 Reg Blk */ uint32_t gpe1_blk; /* Port addr of General Purpose acpi_event 1 Reg Blk */ uint8_t pm1_evt_len; /* Byte length of ports at pm1_x_evt_blk */ uint8_t pm1_cnt_len; /* Byte length of ports at pm1_x_cnt_blk */ uint8_t pm2_cnt_len; /* Byte Length of ports at pm2_cnt_blk */ uint8_t pm_tmr_len; /* Byte Length of ports at pm_tm_blk */ uint8_t gpe0_blk_len; /* Byte Length of ports at gpe0_blk */ uint8_t gpe1_blk_len; /* Byte Length of ports at gpe1_blk */ uint8_t gpe1_base; /* Offset in gpe model where gpe1 events start */ uint8_t reserved3; /* Reserved */ uint16_t plvl2_lat; /* Worst case HW latency to enter/exit C2 state */ uint16_t plvl3_lat; /* Worst case HW latency to enter/exit C3 state */ uint16_t flush_size; /* Size of area read to flush caches */ uint16_t flush_stride; /* Stride used in flushing caches */ uint8_t duty_offset; /* Bit location of duty cycle field in p_cnt reg */ uint8_t duty_width; /* Bit width of duty cycle field in p_cnt reg */ uint8_t day_alrm; /* Index to day-of-month alarm in RTC CMOS RAM */ uint8_t mon_alrm; /* Index to month-of-year alarm in RTC CMOS RAM */ uint8_t century; /* Index to century in RTC CMOS RAM */ uint8_t reserved4; /* Reserved */ uint8_t reserved4a; /* Reserved */ uint8_t reserved4b; /* Reserved */ #if 0 uint32_t wb_invd : 1; /* The wbinvd instruction works properly */ uint32_t wb_invd_flush : 1; /* The wbinvd flushes but does not invalidate */ uint32_t proc_c1 : 1; /* All processors support C1 state */ uint32_t plvl2_up : 1; /* C2 state works on MP system */ uint32_t pwr_button : 1; /* Power button is handled as a generic feature */ uint32_t sleep_button : 1; /* Sleep button is handled as a generic feature, or not present */ uint32_t fixed_rTC : 1; /* RTC wakeup stat not in fixed register space */ uint32_t rtcs4 : 1; /* RTC wakeup stat not possible from S4 */ uint32_t tmr_val_ext : 1; /* The tmr_val width is 32 bits (0 = 24 bits) */ uint32_t reserved5 : 23; /* Reserved - must be zero */ #else uint32_t flags; #endif }; /* * MADT values and structures */ /* Values for MADT PCATCompat */ #define DUAL_PIC 0 #define MULTIPLE_APIC 1 /* Master MADT */ struct multiple_apic_table { ACPI_TABLE_HEADER_DEF /* ACPI common table header */ uint32_t local_apic_address; /* Physical address of local APIC */ #if 0 uint32_t PCATcompat : 1; /* A one indicates system also has dual 8259s */ uint32_t reserved1 : 31; #else uint32_t flags; #endif }; /* Values for Type in APIC_HEADER_DEF */ #define APIC_PROCESSOR 0 #define APIC_IO 1 #define APIC_XRUPT_OVERRIDE 2 #define APIC_NMI 3 #define APIC_LOCAL_NMI 4 #define APIC_ADDRESS_OVERRIDE 5 #define APIC_IO_SAPIC 6 #define APIC_LOCAL_SAPIC 7 #define APIC_XRUPT_SOURCE 8 #define APIC_RESERVED 9 /* 9 and greater are reserved */ /* * MADT sub-structures (Follow MULTIPLE_APIC_DESCRIPTION_TABLE) */ #define APIC_HEADER_DEF /* Common APIC sub-structure header */\ uint8_t type; \ uint8_t length; /* Sub-structures for MADT */ struct madt_processor_apic { APIC_HEADER_DEF uint8_t processor_id; /* ACPI processor id */ uint8_t local_apic_id; /* Processor's local APIC id */ #if 0 uint32_t processor_enabled: 1; /* Processor is usable if set */ uint32_t reserved2 : 31; /* Reserved, must be zero */ #else uint32_t flags; #endif }; struct madt_io_apic { APIC_HEADER_DEF uint8_t io_apic_id; /* I/O APIC ID */ uint8_t reserved; /* Reserved - must be zero */ uint32_t address; /* APIC physical address */ uint32_t interrupt; /* Global system interrupt where INTI * lines start */ }; #include "acpi-dsdt.hex" 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; } static void acpi_build_table_header(struct acpi_table_header *h, char *sig, int len) { memcpy(h->signature, sig, 4); h->length = cpu_to_le32(len); h->revision = 0; memcpy(h->oem_id, "QEMU ", 6); memcpy(h->oem_table_id, "QEMU", 4); memcpy(h->oem_table_id + 4, sig, 4); h->oem_revision = cpu_to_le32(1); memcpy(h->asl_compiler_id, "QEMU", 4); h->asl_compiler_revision = cpu_to_le32(1); h->checksum = acpi_checksum((void *)h, len); } #define ACPI_TABLES_BASE 0x000e8000 /* base_addr must be a multiple of 4KB */ void acpi_bios_init(void) { struct rsdp_descriptor *rsdp; struct rsdt_descriptor_rev1 *rsdt; struct fadt_descriptor_rev1 *fadt; struct facs_descriptor_rev1 *facs; struct multiple_apic_table *madt; uint8_t *dsdt; uint32_t base_addr, rsdt_addr, fadt_addr, addr, facs_addr, dsdt_addr; uint32_t pm_io_base, acpi_tables_size, madt_addr, madt_size; int i; /* compute PCI I/O addresses */ pm_io_base = (piix4_pm_state->dev.config[0x40] | (piix4_pm_state->dev.config[0x41] << 8)) & ~0x3f; base_addr = ACPI_TABLES_BASE; /* reserve memory space for tables */ addr = base_addr; rsdp = (void *)(phys_ram_base + addr); addr += sizeof(*rsdp); rsdt_addr = addr; rsdt = (void *)(phys_ram_base + addr); addr += sizeof(*rsdt); fadt_addr = addr; fadt = (void *)(phys_ram_base + addr); addr += sizeof(*fadt); /* XXX: FACS should be in RAM */ addr = (addr + 63) & ~63; /* 64 byte alignment for FACS */ facs_addr = addr; facs = (void *)(phys_ram_base + addr); addr += sizeof(*facs); dsdt_addr = addr; dsdt = (void *)(phys_ram_base + addr); addr += sizeof(AmlCode); addr = (addr + 7) & ~7; madt_addr = addr; madt_size = sizeof(*madt) + sizeof(struct madt_processor_apic) * smp_cpus + sizeof(struct madt_io_apic); madt = (void *)(phys_ram_base + addr); addr += madt_size; acpi_tables_size = addr - base_addr; cpu_register_physical_memory(base_addr, acpi_tables_size, base_addr | IO_MEM_ROM); /* RSDP */ memset(rsdp, 0, sizeof(*rsdp)); memcpy(rsdp->signature, "RSD PTR ", 8); memcpy(rsdp->oem_id, "QEMU ", 6); rsdp->rsdt_physical_address = cpu_to_le32(rsdt_addr); rsdp->checksum = acpi_checksum((void *)rsdp, 20); /* RSDT */ rsdt->table_offset_entry[0] = cpu_to_le32(fadt_addr); rsdt->table_offset_entry[1] = cpu_to_le32(madt_addr); acpi_build_table_header((struct acpi_table_header *)rsdt, "RSDT", sizeof(*rsdt)); /* FADT */ memset(fadt, 0, sizeof(*fadt)); fadt->firmware_ctrl = cpu_to_le32(facs_addr); fadt->dsdt = cpu_to_le32(dsdt_addr); fadt->model = 1; fadt->reserved1 = 0; fadt->sci_int = cpu_to_le16(piix4_pm_state->dev.config[0x3c]); fadt->smi_cmd = cpu_to_le32(SMI_CMD_IO_ADDR); fadt->acpi_enable = 0xf1; fadt->acpi_disable = 0xf0; fadt->pm1a_evt_blk = cpu_to_le32(pm_io_base); fadt->pm1a_cnt_blk = cpu_to_le32(pm_io_base + 0x04); fadt->pm_tmr_blk = cpu_to_le32(pm_io_base + 0x08); fadt->pm1_evt_len = 4; fadt->pm1_cnt_len = 2; fadt->pm_tmr_len = 4; fadt->plvl2_lat = cpu_to_le16(50); fadt->plvl3_lat = cpu_to_le16(50); fadt->plvl3_lat = cpu_to_le16(50); /* WBINVD + PROC_C1 + PWR_BUTTON + SLP_BUTTON + FIX_RTC */ fadt->flags = cpu_to_le32((1 << 0) | (1 << 2) | (1 << 4) | (1 << 5) | (1 << 6)); acpi_build_table_header((struct acpi_table_header *)fadt, "FACP", sizeof(*fadt)); /* FACS */ memset(facs, 0, sizeof(*facs)); memcpy(facs->signature, "FACS", 4); facs->length = cpu_to_le32(sizeof(*facs)); /* DSDT */ memcpy(dsdt, AmlCode, sizeof(AmlCode)); /* MADT */ { struct madt_processor_apic *apic; struct madt_io_apic *io_apic; memset(madt, 0, madt_size); madt->local_apic_address = cpu_to_le32(0xfee00000); madt->flags = cpu_to_le32(1); apic = (void *)(madt + 1); for(i=0;itype = APIC_PROCESSOR; apic->length = sizeof(*apic); apic->processor_id = i; apic->local_apic_id = i; apic->flags = cpu_to_le32(1); apic++; } io_apic = (void *)apic; io_apic->type = APIC_IO; io_apic->length = sizeof(*io_apic); io_apic->io_apic_id = smp_cpus; io_apic->address = cpu_to_le32(0xfec00000); io_apic->interrupt = cpu_to_le32(0); acpi_build_table_header((struct acpi_table_header *)madt, "APIC", madt_size); } }