| /* |
| * 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 <http://www.gnu.org/licenses/> |
| * |
| * 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" |
| |
| //#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; |
| } 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); |
| 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) |
| { |
| DeviceState *qdev, *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(qdev, &bus->children, sibling, next) { |
| 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 { |
| object_unparent(OBJECT(dev)); |
| 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); |
| DeviceState *qdev, *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(qdev, &bus->children, sibling, next) { |
| 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; |
| |
| 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 |
| |
| pci_conf[0x40] = 0x01; /* PM io base read only bit */ |
| |
| /* 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) |
| { |
| 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); |
| |
| return s->smb.smbus; |
| } |
| |
| static Property piix4_pm_properties[] = { |
| DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0), |
| 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; |
| } |