/* * QEMU PIIX4 PCI Bridge Emulation * * Copyright (c) 2006 Fabrice Bellard * Copyright (c) 2018 Hervé Poussineau * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/irq.h" #include "hw/southbridge/piix.h" #include "hw/pci/pci.h" #include "hw/isa/isa.h" #include "hw/intc/i8259.h" #include "hw/dma/i8257.h" #include "hw/timer/i8254.h" #include "hw/rtc/mc146818rtc.h" #include "hw/ide/pci.h" #include "hw/acpi/piix4.h" #include "hw/usb/hcd-uhci.h" #include "migration/vmstate.h" #include "sysemu/reset.h" #include "sysemu/runstate.h" #include "qom/object.h" struct PIIX4State { PCIDevice dev; qemu_irq cpu_intr; qemu_irq *isa; RTCState rtc; PCIIDEState ide; UHCIState uhci; PIIX4PMState pm; /* Reset Control Register */ MemoryRegion rcr_mem; uint8_t rcr; }; OBJECT_DECLARE_SIMPLE_TYPE(PIIX4State, PIIX4_PCI_DEVICE) static void piix4_set_irq(void *opaque, int irq_num, int level) { int i, pic_irq, pic_level; PIIX4State *s = opaque; PCIBus *bus = pci_get_bus(&s->dev); /* now we change the pic irq level according to the piix irq mappings */ /* XXX: optimize */ pic_irq = s->dev.config[PIIX_PIRQCA + irq_num]; if (pic_irq < ISA_NUM_IRQS) { /* The pic level is the logical OR of all the PCI irqs mapped to it. */ pic_level = 0; for (i = 0; i < PIIX_NUM_PIRQS; i++) { if (pic_irq == s->dev.config[PIIX_PIRQCA + i]) { pic_level |= pci_bus_get_irq_level(bus, i); } } qemu_set_irq(s->isa[pic_irq], pic_level); } } static int pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num) { int slot; slot = PCI_SLOT(pci_dev->devfn); switch (slot) { /* PIIX4 USB */ case 10: return 3; /* AMD 79C973 Ethernet */ case 11: return 1; /* Crystal 4281 Sound */ case 12: return 2; /* PCI slot 1 to 4 */ case 18 ... 21: return ((slot - 18) + irq_num) & 0x03; /* Unknown device, don't do any translation */ default: return irq_num; } } static void piix4_isa_reset(DeviceState *dev) { PIIX4State *d = PIIX4_PCI_DEVICE(dev); uint8_t *pci_conf = d->dev.config; pci_conf[0x04] = 0x07; // master, memory and I/O pci_conf[0x05] = 0x00; pci_conf[0x06] = 0x00; pci_conf[0x07] = 0x02; // PCI_status_devsel_medium pci_conf[0x4c] = 0x4d; pci_conf[0x4e] = 0x03; pci_conf[0x4f] = 0x00; pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10 pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10 pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11 pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11 pci_conf[0x69] = 0x02; pci_conf[0x70] = 0x80; pci_conf[0x76] = 0x0c; pci_conf[0x77] = 0x0c; pci_conf[0x78] = 0x02; pci_conf[0x79] = 0x00; pci_conf[0x80] = 0x00; pci_conf[0x82] = 0x00; pci_conf[0xa0] = 0x08; pci_conf[0xa2] = 0x00; pci_conf[0xa3] = 0x00; pci_conf[0xa4] = 0x00; pci_conf[0xa5] = 0x00; pci_conf[0xa6] = 0x00; pci_conf[0xa7] = 0x00; pci_conf[0xa8] = 0x0f; pci_conf[0xaa] = 0x00; pci_conf[0xab] = 0x00; pci_conf[0xac] = 0x00; pci_conf[0xae] = 0x00; } static int piix4_ide_post_load(void *opaque, int version_id) { PIIX4State *s = opaque; if (version_id == 2) { s->rcr = 0; } return 0; } static const VMStateDescription vmstate_piix4 = { .name = "PIIX4", .version_id = 3, .minimum_version_id = 2, .post_load = piix4_ide_post_load, .fields = (VMStateField[]) { VMSTATE_PCI_DEVICE(dev, PIIX4State), VMSTATE_UINT8_V(rcr, PIIX4State, 3), VMSTATE_END_OF_LIST() } }; static void piix4_request_i8259_irq(void *opaque, int irq, int level) { PIIX4State *s = opaque; qemu_set_irq(s->cpu_intr, level); } static void piix4_set_i8259_irq(void *opaque, int irq, int level) { PIIX4State *s = opaque; qemu_set_irq(s->isa[irq], level); } static void piix4_rcr_write(void *opaque, hwaddr addr, uint64_t val, unsigned int len) { PIIX4State *s = opaque; if (val & 4) { qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); return; } s->rcr = val & 2; /* keep System Reset type only */ } static uint64_t piix4_rcr_read(void *opaque, hwaddr addr, unsigned int len) { PIIX4State *s = opaque; return s->rcr; } static const MemoryRegionOps piix4_rcr_ops = { .read = piix4_rcr_read, .write = piix4_rcr_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 1, .max_access_size = 1, }, }; static void piix4_realize(PCIDevice *dev, Error **errp) { PIIX4State *s = PIIX4_PCI_DEVICE(dev); PCIBus *pci_bus = pci_get_bus(dev); ISABus *isa_bus; qemu_irq *i8259_out_irq; isa_bus = isa_bus_new(DEVICE(dev), pci_address_space(dev), pci_address_space_io(dev), errp); if (!isa_bus) { return; } qdev_init_gpio_in_named(DEVICE(dev), piix4_set_i8259_irq, "isa", ISA_NUM_IRQS); qdev_init_gpio_out_named(DEVICE(dev), &s->cpu_intr, "intr", 1); memory_region_init_io(&s->rcr_mem, OBJECT(dev), &piix4_rcr_ops, s, "reset-control", 1); memory_region_add_subregion_overlap(pci_address_space_io(dev), PIIX_RCR_IOPORT, &s->rcr_mem, 1); /* initialize i8259 pic */ i8259_out_irq = qemu_allocate_irqs(piix4_request_i8259_irq, s, 1); s->isa = i8259_init(isa_bus, *i8259_out_irq); /* initialize ISA irqs */ isa_bus_irqs(isa_bus, s->isa); /* initialize pit */ i8254_pit_init(isa_bus, 0x40, 0, NULL); /* DMA */ i8257_dma_init(isa_bus, 0); /* RTC */ qdev_prop_set_int32(DEVICE(&s->rtc), "base_year", 2000); if (!qdev_realize(DEVICE(&s->rtc), BUS(isa_bus), errp)) { return; } s->rtc.irq = isa_get_irq(ISA_DEVICE(&s->rtc), s->rtc.isairq); /* IDE */ qdev_prop_set_int32(DEVICE(&s->ide), "addr", dev->devfn + 1); if (!qdev_realize(DEVICE(&s->ide), BUS(pci_bus), errp)) { return; } pci_ide_create_devs(PCI_DEVICE(&s->ide)); /* USB */ qdev_prop_set_int32(DEVICE(&s->uhci), "addr", dev->devfn + 2); if (!qdev_realize(DEVICE(&s->uhci), BUS(pci_bus), errp)) { return; } /* ACPI controller */ qdev_prop_set_int32(DEVICE(&s->pm), "addr", dev->devfn + 3); if (!qdev_realize(DEVICE(&s->pm), BUS(pci_bus), errp)) { return; } qdev_connect_gpio_out(DEVICE(&s->pm), 0, s->isa[9]); pci_bus_irqs(pci_bus, piix4_set_irq, pci_slot_get_pirq, s, PIIX_NUM_PIRQS); } static void piix4_init(Object *obj) { PIIX4State *s = PIIX4_PCI_DEVICE(obj); object_initialize_child(obj, "rtc", &s->rtc, TYPE_MC146818_RTC); object_initialize_child(obj, "ide", &s->ide, "piix4-ide"); object_initialize_child(obj, "uhci", &s->uhci, "piix4-usb-uhci"); object_initialize_child(obj, "pm", &s->pm, TYPE_PIIX4_PM); qdev_prop_set_uint32(DEVICE(&s->pm), "smb_io_base", 0x1100); qdev_prop_set_bit(DEVICE(&s->pm), "smm-enabled", 0); } static void piix4_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->realize = piix4_realize; k->vendor_id = PCI_VENDOR_ID_INTEL; k->device_id = PCI_DEVICE_ID_INTEL_82371AB_0; k->class_id = PCI_CLASS_BRIDGE_ISA; dc->reset = piix4_isa_reset; dc->desc = "ISA bridge"; dc->vmsd = &vmstate_piix4; /* * Reason: part of PIIX4 southbridge, needs to be wired up, * e.g. by mips_malta_init() */ dc->user_creatable = false; dc->hotpluggable = false; } static const TypeInfo piix4_info = { .name = TYPE_PIIX4_PCI_DEVICE, .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(PIIX4State), .instance_init = piix4_init, .class_init = piix4_class_init, .interfaces = (InterfaceInfo[]) { { INTERFACE_CONVENTIONAL_PCI_DEVICE }, { }, }, }; static void piix4_register_types(void) { type_register_static(&piix4_info); } type_init(piix4_register_types)