/* * QEMU ICH9 Emulation * * Copyright (c) 2006 Fabrice Bellard * Copyright (c) 2009, 2010, 2011 * Isaku Yamahata * VA Linux Systems Japan K.K. * Copyright (C) 2012 Jason Baron * * This is based on piix.c, but heavily modified. * * 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-common.h" #include "hw/hw.h" #include "qapi/visitor.h" #include "qemu/range.h" #include "hw/isa/isa.h" #include "hw/sysbus.h" #include "hw/i386/pc.h" #include "hw/isa/apm.h" #include "hw/i386/ioapic.h" #include "hw/pci/pci.h" #include "hw/pci/pcie_host.h" #include "hw/pci/pci_bridge.h" #include "hw/i386/ich9.h" #include "hw/acpi/acpi.h" #include "hw/acpi/ich9.h" #include "hw/pci/pci_bus.h" #include "exec/address-spaces.h" #include "sysemu/sysemu.h" static int ich9_lpc_sci_irq(ICH9LPCState *lpc); /*****************************************************************************/ /* ICH9 LPC PCI to ISA bridge */ static void ich9_lpc_reset(DeviceState *qdev); /* chipset configuration register * to access chipset configuration registers, pci_[sg]et_{byte, word, long} * are used. * Although it's not pci configuration space, it's little endian as Intel. */ static void ich9_cc_update_ir(uint8_t irr[PCI_NUM_PINS], uint16_t ir) { int intx; for (intx = 0; intx < PCI_NUM_PINS; intx++) { irr[intx] = (ir >> (intx * ICH9_CC_DIR_SHIFT)) & ICH9_CC_DIR_MASK; } } static void ich9_cc_update(ICH9LPCState *lpc) { int slot; int pci_intx; const int reg_offsets[] = { ICH9_CC_D25IR, ICH9_CC_D26IR, ICH9_CC_D27IR, ICH9_CC_D28IR, ICH9_CC_D29IR, ICH9_CC_D30IR, ICH9_CC_D31IR, }; const int *offset; /* D{25 - 31}IR, but D30IR is read only to 0. */ for (slot = 25, offset = reg_offsets; slot < 32; slot++, offset++) { if (slot == 30) { continue; } ich9_cc_update_ir(lpc->irr[slot], pci_get_word(lpc->chip_config + *offset)); } /* * D30: DMI2PCI bridge * It is arbitrarily decided how INTx lines of PCI devicesbehind the bridge * are connected to pirq lines. Our choice is PIRQ[E-H]. * INT[A-D] are connected to PIRQ[E-H] */ for (pci_intx = 0; pci_intx < PCI_NUM_PINS; pci_intx++) { lpc->irr[30][pci_intx] = pci_intx + 4; } } static void ich9_cc_init(ICH9LPCState *lpc) { int slot; int intx; /* the default irq routing is arbitrary as long as it matches with * acpi irq routing table. * The one that is incompatible with piix_pci(= bochs) one is * intentionally chosen to let the users know that the different * board is used. * * int[A-D] -> pirq[E-F] * avoid pirq A-D because they are used for pci express port */ for (slot = 0; slot < PCI_SLOT_MAX; slot++) { for (intx = 0; intx < PCI_NUM_PINS; intx++) { lpc->irr[slot][intx] = (slot + intx) % 4 + 4; } } ich9_cc_update(lpc); } static void ich9_cc_reset(ICH9LPCState *lpc) { uint8_t *c = lpc->chip_config; memset(lpc->chip_config, 0, sizeof(lpc->chip_config)); pci_set_long(c + ICH9_CC_D31IR, ICH9_CC_DIR_DEFAULT); pci_set_long(c + ICH9_CC_D30IR, ICH9_CC_D30IR_DEFAULT); pci_set_long(c + ICH9_CC_D29IR, ICH9_CC_DIR_DEFAULT); pci_set_long(c + ICH9_CC_D28IR, ICH9_CC_DIR_DEFAULT); pci_set_long(c + ICH9_CC_D27IR, ICH9_CC_DIR_DEFAULT); pci_set_long(c + ICH9_CC_D26IR, ICH9_CC_DIR_DEFAULT); pci_set_long(c + ICH9_CC_D25IR, ICH9_CC_DIR_DEFAULT); ich9_cc_update(lpc); } static void ich9_cc_addr_len(uint64_t *addr, unsigned *len) { *addr &= ICH9_CC_ADDR_MASK; if (*addr + *len >= ICH9_CC_SIZE) { *len = ICH9_CC_SIZE - *addr; } } /* val: little endian */ static void ich9_cc_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { ICH9LPCState *lpc = (ICH9LPCState *)opaque; ich9_cc_addr_len(&addr, &len); memcpy(lpc->chip_config + addr, &val, len); pci_bus_fire_intx_routing_notifier(lpc->d.bus); ich9_cc_update(lpc); } /* return value: little endian */ static uint64_t ich9_cc_read(void *opaque, hwaddr addr, unsigned len) { ICH9LPCState *lpc = (ICH9LPCState *)opaque; uint32_t val = 0; ich9_cc_addr_len(&addr, &len); memcpy(&val, lpc->chip_config + addr, len); return val; } /* IRQ routing */ /* */ static void ich9_lpc_rout(uint8_t pirq_rout, int *pic_irq, int *pic_dis) { *pic_irq = pirq_rout & ICH9_LPC_PIRQ_ROUT_MASK; *pic_dis = pirq_rout & ICH9_LPC_PIRQ_ROUT_IRQEN; } static void ich9_lpc_pic_irq(ICH9LPCState *lpc, int pirq_num, int *pic_irq, int *pic_dis) { switch (pirq_num) { case 0 ... 3: /* A-D */ ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQA_ROUT + pirq_num], pic_irq, pic_dis); return; case 4 ... 7: /* E-H */ ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQE_ROUT + (pirq_num - 4)], pic_irq, pic_dis); return; default: break; } abort(); } /* pic_irq: i8254 irq 0-15 */ static void ich9_lpc_update_pic(ICH9LPCState *lpc, int pic_irq) { int i, pic_level; /* The pic level is the logical OR of all the PCI irqs mapped to it */ pic_level = 0; for (i = 0; i < ICH9_LPC_NB_PIRQS; i++) { int tmp_irq; int tmp_dis; ich9_lpc_pic_irq(lpc, i, &tmp_irq, &tmp_dis); if (!tmp_dis && pic_irq == tmp_irq) { pic_level |= pci_bus_get_irq_level(lpc->d.bus, i); } } if (pic_irq == ich9_lpc_sci_irq(lpc)) { pic_level |= lpc->sci_level; } qemu_set_irq(lpc->pic[pic_irq], pic_level); } /* pirq: pirq[A-H] 0-7*/ static void ich9_lpc_update_by_pirq(ICH9LPCState *lpc, int pirq) { int pic_irq; int pic_dis; ich9_lpc_pic_irq(lpc, pirq, &pic_irq, &pic_dis); assert(pic_irq < ICH9_LPC_PIC_NUM_PINS); if (pic_dis) { return; } ich9_lpc_update_pic(lpc, pic_irq); } /* APIC mode: GSIx: PIRQ[A-H] -> GSI 16, ... no pirq shares same APIC pins. */ static int ich9_pirq_to_gsi(int pirq) { return pirq + ICH9_LPC_PIC_NUM_PINS; } static int ich9_gsi_to_pirq(int gsi) { return gsi - ICH9_LPC_PIC_NUM_PINS; } static void ich9_lpc_update_apic(ICH9LPCState *lpc, int gsi) { int level = 0; if (gsi >= ICH9_LPC_PIC_NUM_PINS) { level |= pci_bus_get_irq_level(lpc->d.bus, ich9_gsi_to_pirq(gsi)); } if (gsi == ich9_lpc_sci_irq(lpc)) { level |= lpc->sci_level; } qemu_set_irq(lpc->ioapic[gsi], level); } void ich9_lpc_set_irq(void *opaque, int pirq, int level) { ICH9LPCState *lpc = opaque; assert(0 <= pirq); assert(pirq < ICH9_LPC_NB_PIRQS); ich9_lpc_update_apic(lpc, ich9_pirq_to_gsi(pirq)); ich9_lpc_update_by_pirq(lpc, pirq); } /* return the pirq number (PIRQ[A-H]:0-7) corresponding to * a given device irq pin. */ int ich9_lpc_map_irq(PCIDevice *pci_dev, int intx) { BusState *bus = qdev_get_parent_bus(&pci_dev->qdev); PCIBus *pci_bus = PCI_BUS(bus); PCIDevice *lpc_pdev = pci_bus->devices[PCI_DEVFN(ICH9_LPC_DEV, ICH9_LPC_FUNC)]; ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pdev); return lpc->irr[PCI_SLOT(pci_dev->devfn)][intx]; } PCIINTxRoute ich9_route_intx_pin_to_irq(void *opaque, int pirq_pin) { ICH9LPCState *lpc = opaque; PCIINTxRoute route; int pic_irq; int pic_dis; assert(0 <= pirq_pin); assert(pirq_pin < ICH9_LPC_NB_PIRQS); route.mode = PCI_INTX_ENABLED; ich9_lpc_pic_irq(lpc, pirq_pin, &pic_irq, &pic_dis); if (!pic_dis) { if (pic_irq < ICH9_LPC_PIC_NUM_PINS) { route.irq = pic_irq; } else { route.mode = PCI_INTX_DISABLED; route.irq = -1; } } else { route.irq = ich9_pirq_to_gsi(pirq_pin); } return route; } static int ich9_lpc_sci_irq(ICH9LPCState *lpc) { switch (lpc->d.config[ICH9_LPC_ACPI_CTRL] & ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK) { case ICH9_LPC_ACPI_CTRL_9: return 9; case ICH9_LPC_ACPI_CTRL_10: return 10; case ICH9_LPC_ACPI_CTRL_11: return 11; case ICH9_LPC_ACPI_CTRL_20: return 20; case ICH9_LPC_ACPI_CTRL_21: return 21; default: /* reserved */ break; } return -1; } static void ich9_set_sci(void *opaque, int irq_num, int level) { ICH9LPCState *lpc = opaque; int irq; assert(irq_num == 0); level = !!level; if (level == lpc->sci_level) { return; } lpc->sci_level = level; irq = ich9_lpc_sci_irq(lpc); if (irq < 0) { return; } ich9_lpc_update_apic(lpc, irq); if (irq < ICH9_LPC_PIC_NUM_PINS) { ich9_lpc_update_pic(lpc, irq); } } void ich9_lpc_pm_init(PCIDevice *lpc_pci) { ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pci); qemu_irq *sci_irq; sci_irq = qemu_allocate_irqs(ich9_set_sci, lpc, 1); ich9_pm_init(lpc_pci, &lpc->pm, sci_irq[0]); ich9_lpc_reset(&lpc->d.qdev); } /* APM */ static void ich9_apm_ctrl_changed(uint32_t val, void *arg) { ICH9LPCState *lpc = arg; /* ACPI specs 3.0, 4.7.2.5 */ acpi_pm1_cnt_update(&lpc->pm.acpi_regs, val == ICH9_APM_ACPI_ENABLE, val == ICH9_APM_ACPI_DISABLE); /* SMI_EN = PMBASE + 30. SMI control and enable register */ if (lpc->pm.smi_en & ICH9_PMIO_SMI_EN_APMC_EN) { cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI); } } /* config:PMBASE */ static void ich9_lpc_pmbase_update(ICH9LPCState *lpc) { uint32_t pm_io_base = pci_get_long(lpc->d.config + ICH9_LPC_PMBASE); pm_io_base &= ICH9_LPC_PMBASE_BASE_ADDRESS_MASK; ich9_pm_iospace_update(&lpc->pm, pm_io_base); } /* config:RBCA */ static void ich9_lpc_rcba_update(ICH9LPCState *lpc, uint32_t rbca_old) { uint32_t rbca = pci_get_long(lpc->d.config + ICH9_LPC_RCBA); if (rbca_old & ICH9_LPC_RCBA_EN) { memory_region_del_subregion(get_system_memory(), &lpc->rbca_mem); } if (rbca & ICH9_LPC_RCBA_EN) { memory_region_add_subregion_overlap(get_system_memory(), rbca & ICH9_LPC_RCBA_BA_MASK, &lpc->rbca_mem, 1); } } static int ich9_lpc_post_load(void *opaque, int version_id) { ICH9LPCState *lpc = opaque; ich9_lpc_pmbase_update(lpc); ich9_lpc_rcba_update(lpc, 0 /* disabled ICH9_LPC_RBCA_EN */); return 0; } static void ich9_lpc_config_write(PCIDevice *d, uint32_t addr, uint32_t val, int len) { ICH9LPCState *lpc = ICH9_LPC_DEVICE(d); uint32_t rbca_old = pci_get_long(d->config + ICH9_LPC_RCBA); pci_default_write_config(d, addr, val, len); if (ranges_overlap(addr, len, ICH9_LPC_PMBASE, 4)) { ich9_lpc_pmbase_update(lpc); } if (ranges_overlap(addr, len, ICH9_LPC_RCBA, 4)) { ich9_lpc_rcba_update(lpc, rbca_old); } if (ranges_overlap(addr, len, ICH9_LPC_PIRQA_ROUT, 4)) { pci_bus_fire_intx_routing_notifier(lpc->d.bus); } if (ranges_overlap(addr, len, ICH9_LPC_PIRQE_ROUT, 4)) { pci_bus_fire_intx_routing_notifier(lpc->d.bus); } } static void ich9_lpc_reset(DeviceState *qdev) { PCIDevice *d = PCI_DEVICE(qdev); ICH9LPCState *lpc = ICH9_LPC_DEVICE(d); uint32_t rbca_old = pci_get_long(d->config + ICH9_LPC_RCBA); int i; for (i = 0; i < 4; i++) { pci_set_byte(d->config + ICH9_LPC_PIRQA_ROUT + i, ICH9_LPC_PIRQ_ROUT_DEFAULT); } for (i = 0; i < 4; i++) { pci_set_byte(d->config + ICH9_LPC_PIRQE_ROUT + i, ICH9_LPC_PIRQ_ROUT_DEFAULT); } pci_set_byte(d->config + ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_DEFAULT); pci_set_long(d->config + ICH9_LPC_PMBASE, ICH9_LPC_PMBASE_DEFAULT); pci_set_long(d->config + ICH9_LPC_RCBA, ICH9_LPC_RCBA_DEFAULT); ich9_cc_reset(lpc); ich9_lpc_pmbase_update(lpc); ich9_lpc_rcba_update(lpc, rbca_old); lpc->sci_level = 0; lpc->rst_cnt = 0; } static const MemoryRegionOps rbca_mmio_ops = { .read = ich9_cc_read, .write = ich9_cc_write, .endianness = DEVICE_LITTLE_ENDIAN, }; static void ich9_lpc_machine_ready(Notifier *n, void *opaque) { ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready); MemoryRegion *io_as = pci_address_space_io(&s->d); uint8_t *pci_conf; pci_conf = s->d.config; if (memory_region_present(io_as, 0x3f8)) { /* com1 */ pci_conf[0x82] |= 0x01; } if (memory_region_present(io_as, 0x2f8)) { /* com2 */ pci_conf[0x82] |= 0x02; } if (memory_region_present(io_as, 0x378)) { /* lpt */ pci_conf[0x82] |= 0x04; } if (memory_region_present(io_as, 0x3f0)) { /* floppy */ pci_conf[0x82] |= 0x08; } } /* reset control */ static void ich9_rst_cnt_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { ICH9LPCState *lpc = opaque; if (val & 4) { qemu_system_reset_request(); return; } lpc->rst_cnt = val & 0xA; /* keep FULL_RST (bit 3) and SYS_RST (bit 1) */ } static uint64_t ich9_rst_cnt_read(void *opaque, hwaddr addr, unsigned len) { ICH9LPCState *lpc = opaque; return lpc->rst_cnt; } static const MemoryRegionOps ich9_rst_cnt_ops = { .read = ich9_rst_cnt_read, .write = ich9_rst_cnt_write, .endianness = DEVICE_LITTLE_ENDIAN }; Object *ich9_lpc_find(void) { bool ambig; Object *o = object_resolve_path_type("", TYPE_ICH9_LPC_DEVICE, &ambig); if (ambig) { return NULL; } return o; } static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, void *opaque, const char *name, Error **errp) { ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj); uint32_t value = ich9_lpc_sci_irq(lpc); visit_type_uint32(v, &value, name, errp); } static void ich9_lpc_add_properties(ICH9LPCState *lpc) { static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE; static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE; object_property_add(OBJECT(lpc), ACPI_PM_PROP_SCI_INT, "uint32", ich9_lpc_get_sci_int, NULL, NULL, NULL, NULL); object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD, &acpi_enable_cmd, NULL); object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD, &acpi_disable_cmd, NULL); ich9_pm_add_properties(OBJECT(lpc), &lpc->pm, NULL); } static void ich9_lpc_initfn(Object *obj) { ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj); ich9_lpc_add_properties(lpc); } static int ich9_lpc_init(PCIDevice *d) { ICH9LPCState *lpc = ICH9_LPC_DEVICE(d); ISABus *isa_bus; isa_bus = isa_bus_new(&d->qdev, get_system_io()); pci_set_long(d->wmask + ICH9_LPC_PMBASE, ICH9_LPC_PMBASE_BASE_ADDRESS_MASK); memory_region_init_io(&lpc->rbca_mem, OBJECT(d), &rbca_mmio_ops, lpc, "lpc-rbca-mmio", ICH9_CC_SIZE); lpc->isa_bus = isa_bus; ich9_cc_init(lpc); apm_init(d, &lpc->apm, ich9_apm_ctrl_changed, lpc); lpc->machine_ready.notify = ich9_lpc_machine_ready; qemu_add_machine_init_done_notifier(&lpc->machine_ready); memory_region_init_io(&lpc->rst_cnt_mem, OBJECT(d), &ich9_rst_cnt_ops, lpc, "lpc-reset-control", 1); memory_region_add_subregion_overlap(pci_address_space_io(d), ICH9_RST_CNT_IOPORT, &lpc->rst_cnt_mem, 1); return 0; } static void ich9_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev); ich9_pm_device_plug_cb(&lpc->pm, dev, errp); } static void ich9_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { error_setg(errp, "acpi: device unplug request for not supported device" " type: %s", object_get_typename(OBJECT(dev))); } static bool ich9_rst_cnt_needed(void *opaque) { ICH9LPCState *lpc = opaque; return (lpc->rst_cnt != 0); } static const VMStateDescription vmstate_ich9_rst_cnt = { .name = "ICH9LPC/rst_cnt", .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_UINT8(rst_cnt, ICH9LPCState), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_ich9_lpc = { .name = "ICH9LPC", .version_id = 1, .minimum_version_id = 1, .post_load = ich9_lpc_post_load, .fields = (VMStateField[]) { VMSTATE_PCI_DEVICE(d, ICH9LPCState), VMSTATE_STRUCT(apm, ICH9LPCState, 0, vmstate_apm, APMState), VMSTATE_STRUCT(pm, ICH9LPCState, 0, vmstate_ich9_pm, ICH9LPCPMRegs), VMSTATE_UINT8_ARRAY(chip_config, ICH9LPCState, ICH9_CC_SIZE), VMSTATE_UINT32(sci_level, ICH9LPCState), VMSTATE_END_OF_LIST() }, .subsections = (VMStateSubsection[]) { { .vmsd = &vmstate_ich9_rst_cnt, .needed = ich9_rst_cnt_needed }, { 0 } } }; static void ich9_lpc_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass); set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); dc->reset = ich9_lpc_reset; k->init = ich9_lpc_init; dc->vmsd = &vmstate_ich9_lpc; k->config_write = ich9_lpc_config_write; dc->desc = "ICH9 LPC bridge"; k->vendor_id = PCI_VENDOR_ID_INTEL; k->device_id = PCI_DEVICE_ID_INTEL_ICH9_8; k->revision = ICH9_A2_LPC_REVISION; k->class_id = PCI_CLASS_BRIDGE_ISA; /* * Reason: part of ICH9 southbridge, needs to be wired up by * pc_q35_init() */ dc->cannot_instantiate_with_device_add_yet = true; hc->plug = ich9_device_plug_cb; hc->unplug = ich9_device_unplug_cb; adevc->ospm_status = ich9_pm_ospm_status; } static const TypeInfo ich9_lpc_info = { .name = TYPE_ICH9_LPC_DEVICE, .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(struct ICH9LPCState), .instance_init = ich9_lpc_initfn, .class_init = ich9_lpc_class_init, .interfaces = (InterfaceInfo[]) { { TYPE_HOTPLUG_HANDLER }, { TYPE_ACPI_DEVICE_IF }, { } } }; static void ich9_lpc_register(void) { type_register_static(&ich9_lpc_info); } type_init(ich9_lpc_register);