/* * 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 * * Contributions after 2012-01-13 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. */ #include "hw.h" #include "pc.h" #include "apm.h" #include "pm_smbus.h" #include "pci.h" #include "acpi.h" #include "sysemu.h" #include "range.h" #include "ioport.h" #include "fw_cfg.h" //#define DEBUG #ifdef DEBUG # define PIIX4_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) #else # define PIIX4_DPRINTF(format, ...) do { } while (0) #endif #define ACPI_DBG_IO_ADDR 0xb044 #define GPE_BASE 0xafe0 #define GPE_LEN 4 #define PCI_UP_BASE 0xae00 #define PCI_DOWN_BASE 0xae04 #define PCI_EJ_BASE 0xae08 #define PCI_RMV_BASE 0xae0c #define PIIX4_PCI_HOTPLUG_STATUS 2 struct pci_status { uint32_t up; /* deprecated, maintained for migration compatibility */ uint32_t down; }; typedef struct PIIX4PMState { PCIDevice dev; IORange ioport; ACPIREGS ar; APMState apm; PMSMBus smb; uint32_t smb_io_base; qemu_irq irq; qemu_irq smi_irq; int kvm_enabled; Notifier machine_ready; /* for pci hotplug */ struct pci_status pci0_status; uint32_t pci0_hotplug_enable; uint32_t pci0_slot_device_present; uint8_t disable_s3; uint8_t disable_s4; uint8_t s4_val; } PIIX4PMState; static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s); #define ACPI_ENABLE 0xf1 #define ACPI_DISABLE 0xf0 static void pm_update_sci(PIIX4PMState *s) { int sci_level, pmsts; pmsts = acpi_pm1_evt_get_sts(&s->ar); sci_level = (((pmsts & s->ar.pm1.evt.en) & (ACPI_BITMASK_RT_CLOCK_ENABLE | ACPI_BITMASK_POWER_BUTTON_ENABLE | ACPI_BITMASK_GLOBAL_LOCK_ENABLE | ACPI_BITMASK_TIMER_ENABLE)) != 0) || (((s->ar.gpe.sts[0] & s->ar.gpe.en[0]) & PIIX4_PCI_HOTPLUG_STATUS) != 0); qemu_set_irq(s->irq, sci_level); /* schedule a timer interruption if needed */ acpi_pm_tmr_update(&s->ar, (s->ar.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) && !(pmsts & ACPI_BITMASK_TIMER_STATUS)); } static void pm_tmr_timer(ACPIREGS *ar) { PIIX4PMState *s = container_of(ar, PIIX4PMState, ar); pm_update_sci(s); } static void pm_ioport_write(IORange *ioport, uint64_t addr, unsigned width, uint64_t val) { PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport); if (width != 2) { PIIX4_DPRINTF("PM write port=0x%04x width=%d val=0x%08x\n", (unsigned)addr, width, (unsigned)val); } switch(addr) { case 0x00: acpi_pm1_evt_write_sts(&s->ar, val); pm_update_sci(s); break; case 0x02: acpi_pm1_evt_write_en(&s->ar, val); pm_update_sci(s); break; case 0x04: acpi_pm1_cnt_write(&s->ar, val, s->s4_val); break; default: break; } PIIX4_DPRINTF("PM writew port=0x%04x val=0x%04x\n", (unsigned int)addr, (unsigned int)val); } static void pm_ioport_read(IORange *ioport, uint64_t addr, unsigned width, uint64_t *data) { PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport); uint32_t val; switch(addr) { case 0x00: val = acpi_pm1_evt_get_sts(&s->ar); break; case 0x02: val = s->ar.pm1.evt.en; break; case 0x04: val = s->ar.pm1.cnt.cnt; break; case 0x08: val = acpi_pm_tmr_get(&s->ar); break; default: val = 0; break; } PIIX4_DPRINTF("PM readw port=0x%04x val=0x%04x\n", (unsigned int)addr, val); *data = val; } static const IORangeOps pm_iorange_ops = { .read = pm_ioport_read, .write = pm_ioport_write, }; static void apm_ctrl_changed(uint32_t val, void *arg) { PIIX4PMState *s = arg; /* ACPI specs 3.0, 4.7.2.5 */ acpi_pm1_cnt_update(&s->ar, val == ACPI_ENABLE, val == ACPI_DISABLE); if (s->dev.config[0x5b] & (1 << 1)) { if (s->smi_irq) { qemu_irq_raise(s->smi_irq); } } } static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val) { PIIX4_DPRINTF("ACPI: DBG: 0x%08x\n", val); } static void pm_io_space_update(PIIX4PMState *s) { uint32_t pm_io_base; if (s->dev.config[0x80] & 1) { pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40)); pm_io_base &= 0xffc0; /* XXX: need to improve memory and ioport allocation */ PIIX4_DPRINTF("PM: mapping to 0x%x\n", pm_io_base); iorange_init(&s->ioport, &pm_iorange_ops, pm_io_base, 64); ioport_register(&s->ioport); } } static void pm_write_config(PCIDevice *d, uint32_t address, uint32_t val, int len) { pci_default_write_config(d, address, val, len); if (range_covers_byte(address, len, 0x80)) pm_io_space_update((PIIX4PMState *)d); } static void vmstate_pci_status_pre_save(void *opaque) { struct pci_status *pci0_status = opaque; PIIX4PMState *s = container_of(pci0_status, PIIX4PMState, pci0_status); /* We no longer track up, so build a safe value for migrating * to a version that still does... of course these might get lost * by an old buggy implementation, but we try. */ pci0_status->up = s->pci0_slot_device_present & s->pci0_hotplug_enable; } static int vmstate_acpi_post_load(void *opaque, int version_id) { PIIX4PMState *s = opaque; pm_io_space_update(s); return 0; } #define VMSTATE_GPE_ARRAY(_field, _state) \ { \ .name = (stringify(_field)), \ .version_id = 0, \ .num = GPE_LEN, \ .info = &vmstate_info_uint16, \ .size = sizeof(uint16_t), \ .flags = VMS_ARRAY | VMS_POINTER, \ .offset = vmstate_offset_pointer(_state, _field, uint8_t), \ } static const VMStateDescription vmstate_gpe = { .name = "gpe", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField []) { VMSTATE_GPE_ARRAY(sts, ACPIGPE), VMSTATE_GPE_ARRAY(en, ACPIGPE), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_pci_status = { .name = "pci_status", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .pre_save = vmstate_pci_status_pre_save, .fields = (VMStateField []) { VMSTATE_UINT32(up, struct pci_status), VMSTATE_UINT32(down, struct pci_status), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_acpi = { .name = "piix4_pm", .version_id = 2, .minimum_version_id = 1, .minimum_version_id_old = 1, .post_load = vmstate_acpi_post_load, .fields = (VMStateField []) { VMSTATE_PCI_DEVICE(dev, PIIX4PMState), VMSTATE_UINT16(ar.pm1.evt.sts, PIIX4PMState), VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState), VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState), VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState), VMSTATE_TIMER(ar.tmr.timer, PIIX4PMState), VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState), VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE), VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status, struct pci_status), VMSTATE_END_OF_LIST() } }; static void acpi_piix_eject_slot(PIIX4PMState *s, unsigned slots) { BusChild *kid, *next; BusState *bus = qdev_get_parent_bus(&s->dev.qdev); int slot = ffs(slots) - 1; bool slot_free = true; /* Mark request as complete */ s->pci0_status.down &= ~(1U << slot); QTAILQ_FOREACH_SAFE(kid, &bus->children, sibling, next) { DeviceState *qdev = kid->child; PCIDevice *dev = PCI_DEVICE(qdev); PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); if (PCI_SLOT(dev->devfn) == slot) { if (pc->no_hotplug) { slot_free = false; } else { qdev_free(qdev); } } } if (slot_free) { s->pci0_slot_device_present &= ~(1U << slot); } } static void piix4_update_hotplug(PIIX4PMState *s) { PCIDevice *dev = &s->dev; BusState *bus = qdev_get_parent_bus(&dev->qdev); BusChild *kid, *next; /* Execute any pending removes during reset */ while (s->pci0_status.down) { acpi_piix_eject_slot(s, s->pci0_status.down); } s->pci0_hotplug_enable = ~0; s->pci0_slot_device_present = 0; QTAILQ_FOREACH_SAFE(kid, &bus->children, sibling, next) { DeviceState *qdev = kid->child; PCIDevice *pdev = PCI_DEVICE(qdev); PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pdev); int slot = PCI_SLOT(pdev->devfn); if (pc->no_hotplug) { s->pci0_hotplug_enable &= ~(1U << slot); } s->pci0_slot_device_present |= (1U << slot); } } static void piix4_reset(void *opaque) { PIIX4PMState *s = opaque; uint8_t *pci_conf = s->dev.config; pci_conf[0x58] = 0; pci_conf[0x59] = 0; pci_conf[0x5a] = 0; pci_conf[0x5b] = 0; pci_conf[0x40] = 0x01; /* PM io base read only bit */ pci_conf[0x80] = 0; if (s->kvm_enabled) { /* Mark SMM as already inited (until KVM supports SMM). */ pci_conf[0x5B] = 0x02; } piix4_update_hotplug(s); } static void piix4_powerdown(void *opaque, int irq, int power_failing) { PIIX4PMState *s = opaque; assert(s != NULL); acpi_pm1_evt_power_down(&s->ar); } static void piix4_pm_machine_ready(Notifier *n, void *opaque) { PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready); uint8_t *pci_conf; pci_conf = s->dev.config; pci_conf[0x5f] = (isa_is_ioport_assigned(0x378) ? 0x80 : 0) | 0x10; pci_conf[0x63] = 0x60; pci_conf[0x67] = (isa_is_ioport_assigned(0x3f8) ? 0x08 : 0) | (isa_is_ioport_assigned(0x2f8) ? 0x90 : 0); } static int piix4_pm_initfn(PCIDevice *dev) { PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev); uint8_t *pci_conf; pci_conf = s->dev.config; pci_conf[0x06] = 0x80; pci_conf[0x07] = 0x02; pci_conf[0x09] = 0x00; pci_conf[0x3d] = 0x01; // interrupt pin 1 /* APM */ apm_init(&s->apm, apm_ctrl_changed, s); register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s); if (s->kvm_enabled) { /* Mark SMM as already inited to prevent SMM from running. KVM does not * support SMM mode. */ pci_conf[0x5B] = 0x02; } /* XXX: which specification is used ? The i82731AB has different mappings */ pci_conf[0x90] = s->smb_io_base | 1; pci_conf[0x91] = s->smb_io_base >> 8; pci_conf[0xd2] = 0x09; register_ioport_write(s->smb_io_base, 64, 1, smb_ioport_writeb, &s->smb); register_ioport_read(s->smb_io_base, 64, 1, smb_ioport_readb, &s->smb); acpi_pm_tmr_init(&s->ar, pm_tmr_timer); acpi_gpe_init(&s->ar, GPE_LEN); qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1); pm_smbus_init(&s->dev.qdev, &s->smb); s->machine_ready.notify = piix4_pm_machine_ready; qemu_add_machine_init_done_notifier(&s->machine_ready); qemu_register_reset(piix4_reset, s); piix4_acpi_system_hot_add_init(dev->bus, s); return 0; } i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base, qemu_irq sci_irq, qemu_irq smi_irq, int kvm_enabled, void *fw_cfg) { PCIDevice *dev; PIIX4PMState *s; dev = pci_create(bus, devfn, "PIIX4_PM"); qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base); s = DO_UPCAST(PIIX4PMState, dev, dev); s->irq = sci_irq; acpi_pm1_cnt_init(&s->ar); s->smi_irq = smi_irq; s->kvm_enabled = kvm_enabled; qdev_init_nofail(&dev->qdev); if (fw_cfg) { uint8_t suspend[6] = {128, 0, 0, 129, 128, 128}; suspend[3] = 1 | ((!s->disable_s3) << 7); suspend[4] = s->s4_val | ((!s->disable_s4) << 7); fw_cfg_add_file(fw_cfg, "etc/system-states", g_memdup(suspend, 6), 6); } return s->smb.smbus; } static Property piix4_pm_properties[] = { DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0), DEFINE_PROP_UINT8("disable_s3", PIIX4PMState, disable_s3, 0), DEFINE_PROP_UINT8("disable_s4", PIIX4PMState, disable_s4, 0), DEFINE_PROP_UINT8("s4_val", PIIX4PMState, s4_val, 2), DEFINE_PROP_END_OF_LIST(), }; static void piix4_pm_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->no_hotplug = 1; k->init = piix4_pm_initfn; k->config_write = pm_write_config; k->vendor_id = PCI_VENDOR_ID_INTEL; k->device_id = PCI_DEVICE_ID_INTEL_82371AB_3; k->revision = 0x03; k->class_id = PCI_CLASS_BRIDGE_OTHER; dc->desc = "PM"; dc->no_user = 1; dc->vmsd = &vmstate_acpi; dc->props = piix4_pm_properties; } static TypeInfo piix4_pm_info = { .name = "PIIX4_PM", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(PIIX4PMState), .class_init = piix4_pm_class_init, }; static void piix4_pm_register_types(void) { type_register_static(&piix4_pm_info); } type_init(piix4_pm_register_types) static uint32_t gpe_readb(void *opaque, uint32_t addr) { PIIX4PMState *s = opaque; uint32_t val = acpi_gpe_ioport_readb(&s->ar, addr); PIIX4_DPRINTF("gpe read %x == %x\n", addr, val); return val; } static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val) { PIIX4PMState *s = opaque; acpi_gpe_ioport_writeb(&s->ar, addr, val); pm_update_sci(s); PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val); } static uint32_t pci_up_read(void *opaque, uint32_t addr) { PIIX4PMState *s = opaque; uint32_t val; /* Manufacture an "up" value to cause a device check on any hotplug * slot with a device. Extra device checks are harmless. */ val = s->pci0_slot_device_present & s->pci0_hotplug_enable; PIIX4_DPRINTF("pci_up_read %x\n", val); return val; } static uint32_t pci_down_read(void *opaque, uint32_t addr) { PIIX4PMState *s = opaque; uint32_t val = s->pci0_status.down; PIIX4_DPRINTF("pci_down_read %x\n", val); return val; } static uint32_t pci_features_read(void *opaque, uint32_t addr) { /* No feature defined yet */ PIIX4_DPRINTF("pci_features_read %x\n", 0); return 0; } static void pciej_write(void *opaque, uint32_t addr, uint32_t val) { acpi_piix_eject_slot(opaque, val); PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val); } static uint32_t pcirmv_read(void *opaque, uint32_t addr) { PIIX4PMState *s = opaque; return s->pci0_hotplug_enable; } static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, PCIHotplugState state); static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s) { register_ioport_write(GPE_BASE, GPE_LEN, 1, gpe_writeb, s); register_ioport_read(GPE_BASE, GPE_LEN, 1, gpe_readb, s); acpi_gpe_blk(&s->ar, GPE_BASE); register_ioport_read(PCI_UP_BASE, 4, 4, pci_up_read, s); register_ioport_read(PCI_DOWN_BASE, 4, 4, pci_down_read, s); register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, s); register_ioport_read(PCI_EJ_BASE, 4, 4, pci_features_read, s); register_ioport_read(PCI_RMV_BASE, 4, 4, pcirmv_read, s); pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev); } static void enable_device(PIIX4PMState *s, int slot) { s->ar.gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS; s->pci0_slot_device_present |= (1U << slot); } static void disable_device(PIIX4PMState *s, int slot) { s->ar.gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS; s->pci0_status.down |= (1U << slot); } static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, PCIHotplugState state) { int slot = PCI_SLOT(dev->devfn); PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, PCI_DEVICE(qdev)); /* Don't send event when device is enabled during qemu machine creation: * it is present on boot, no hotplug event is necessary. We do send an * event when the device is disabled later. */ if (state == PCI_COLDPLUG_ENABLED) { s->pci0_slot_device_present |= (1U << slot); return 0; } if (state == PCI_HOTPLUG_ENABLED) { enable_device(s, slot); } else { disable_device(s, slot); } pm_update_sci(s); return 0; }