diff options
Diffstat (limited to 'hw/isa/lpc_ich9.c')
| -rw-r--r-- | hw/isa/lpc_ich9.c | 627 |
1 files changed, 627 insertions, 0 deletions
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c new file mode 100644 index 0000000000..d116075933 --- /dev/null +++ b/hw/isa/lpc_ich9.c @@ -0,0 +1,627 @@ +/* + * QEMU ICH9 Emulation + * + * Copyright (c) 2006 Fabrice Bellard + * Copyright (c) 2009, 2010, 2011 + * Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * Copyright (C) 2012 Jason Baron <jbaron@redhat.com> + * + * This is based on piix_pci.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 "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, qemu_irq cmos_s3) +{ + 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], cmos_s3); + + 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(CPU(x86_env_get_cpu(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); + uint8_t *pci_conf; + + pci_conf = s->d.config; + if (isa_is_ioport_assigned(0x3f8)) { + /* com1 */ + pci_conf[0x82] |= 0x01; + } + if (isa_is_ioport_assigned(0x2f8)) { + /* com2 */ + pci_conf[0x82] |= 0x02; + } + if (isa_is_ioport_assigned(0x378)) { + /* lpt */ + pci_conf[0x82] |= 0x04; + } + if (isa_is_ioport_assigned(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 +}; + +static int ich9_lpc_initfn(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, &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, &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 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, + .minimum_version_id_old = 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); + + dc->reset = ich9_lpc_reset; + k->init = ich9_lpc_initfn; + dc->vmsd = &vmstate_ich9_lpc; + dc->no_user = 1; + 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; + +} + +static const TypeInfo ich9_lpc_info = { + .name = TYPE_ICH9_LPC_DEVICE, + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(struct ICH9LPCState), + .class_init = ich9_lpc_class_init, +}; + +static void ich9_lpc_register(void) +{ + type_register_static(&ich9_lpc_info); +} + +type_init(ich9_lpc_register); |