| /* |
| * QEMU i440FX/PIIX3 PCI Bridge Emulation |
| * |
| * Copyright (c) 2006 Fabrice Bellard |
| * |
| * 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 "hw/hw.h" |
| #include "hw/i386/pc.h" |
| #include "hw/pci/pci.h" |
| #include "hw/pci/pci_host.h" |
| #include "hw/isa/isa.h" |
| #include "hw/sysbus.h" |
| #include "qapi/error.h" |
| #include "qemu/range.h" |
| #include "hw/xen/xen.h" |
| #include "hw/pci-host/pam.h" |
| #include "sysemu/sysemu.h" |
| #include "hw/i386/ioapic.h" |
| #include "qapi/visitor.h" |
| #include "qemu/error-report.h" |
| |
| /* |
| * I440FX chipset data sheet. |
| * http://download.intel.com/design/chipsets/datashts/29054901.pdf |
| */ |
| |
| #define I440FX_PCI_HOST_BRIDGE(obj) \ |
| OBJECT_CHECK(I440FXState, (obj), TYPE_I440FX_PCI_HOST_BRIDGE) |
| |
| typedef struct I440FXState { |
| PCIHostState parent_obj; |
| Range pci_hole; |
| uint64_t pci_hole64_size; |
| uint32_t short_root_bus; |
| } I440FXState; |
| |
| #define PIIX_NUM_PIC_IRQS 16 /* i8259 * 2 */ |
| #define PIIX_NUM_PIRQS 4ULL /* PIRQ[A-D] */ |
| #define XEN_PIIX_NUM_PIRQS 128ULL |
| #define PIIX_PIRQC 0x60 |
| |
| /* |
| * Reset Control Register: PCI-accessible ISA-Compatible Register at address |
| * 0xcf9, provided by the PCI/ISA bridge (PIIX3 PCI function 0, 8086:7000). |
| */ |
| #define RCR_IOPORT 0xcf9 |
| |
| typedef struct PIIX3State { |
| PCIDevice dev; |
| |
| /* |
| * bitmap to track pic levels. |
| * The pic level is the logical OR of all the PCI irqs mapped to it |
| * So one PIC level is tracked by PIIX_NUM_PIRQS bits. |
| * |
| * PIRQ is mapped to PIC pins, we track it by |
| * PIIX_NUM_PIRQS * PIIX_NUM_PIC_IRQS = 64 bits with |
| * pic_irq * PIIX_NUM_PIRQS + pirq |
| */ |
| #if PIIX_NUM_PIC_IRQS * PIIX_NUM_PIRQS > 64 |
| #error "unable to encode pic state in 64bit in pic_levels." |
| #endif |
| uint64_t pic_levels; |
| |
| qemu_irq *pic; |
| |
| /* This member isn't used. Just for save/load compatibility */ |
| int32_t pci_irq_levels_vmstate[PIIX_NUM_PIRQS]; |
| |
| /* Reset Control Register contents */ |
| uint8_t rcr; |
| |
| /* IO memory region for Reset Control Register (RCR_IOPORT) */ |
| MemoryRegion rcr_mem; |
| } PIIX3State; |
| |
| #define TYPE_PIIX3_PCI_DEVICE "pci-piix3" |
| #define PIIX3_PCI_DEVICE(obj) \ |
| OBJECT_CHECK(PIIX3State, (obj), TYPE_PIIX3_PCI_DEVICE) |
| |
| #define I440FX_PCI_DEVICE(obj) \ |
| OBJECT_CHECK(PCII440FXState, (obj), TYPE_I440FX_PCI_DEVICE) |
| |
| struct PCII440FXState { |
| /*< private >*/ |
| PCIDevice parent_obj; |
| /*< public >*/ |
| |
| MemoryRegion *system_memory; |
| MemoryRegion *pci_address_space; |
| MemoryRegion *ram_memory; |
| PAMMemoryRegion pam_regions[13]; |
| MemoryRegion smram_region; |
| MemoryRegion smram, low_smram; |
| }; |
| |
| |
| #define I440FX_PAM 0x59 |
| #define I440FX_PAM_SIZE 7 |
| #define I440FX_SMRAM 0x72 |
| |
| /* Older coreboot versions (4.0 and older) read a config register that doesn't |
| * exist in real hardware, to get the RAM size from QEMU. |
| */ |
| #define I440FX_COREBOOT_RAM_SIZE 0x57 |
| |
| static void piix3_set_irq(void *opaque, int pirq, int level); |
| static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pci_intx); |
| static void piix3_write_config_xen(PCIDevice *dev, |
| uint32_t address, uint32_t val, int len); |
| |
| /* return the global irq number corresponding to a given device irq |
| pin. We could also use the bus number to have a more precise |
| mapping. */ |
| static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx) |
| { |
| int slot_addend; |
| slot_addend = (pci_dev->devfn >> 3) - 1; |
| return (pci_intx + slot_addend) & 3; |
| } |
| |
| static void i440fx_update_memory_mappings(PCII440FXState *d) |
| { |
| int i; |
| PCIDevice *pd = PCI_DEVICE(d); |
| |
| memory_region_transaction_begin(); |
| for (i = 0; i < 13; i++) { |
| pam_update(&d->pam_regions[i], i, |
| pd->config[I440FX_PAM + ((i + 1) / 2)]); |
| } |
| memory_region_set_enabled(&d->smram_region, |
| !(pd->config[I440FX_SMRAM] & SMRAM_D_OPEN)); |
| memory_region_set_enabled(&d->smram, |
| pd->config[I440FX_SMRAM] & SMRAM_G_SMRAME); |
| memory_region_transaction_commit(); |
| } |
| |
| |
| static void i440fx_write_config(PCIDevice *dev, |
| uint32_t address, uint32_t val, int len) |
| { |
| PCII440FXState *d = I440FX_PCI_DEVICE(dev); |
| |
| /* XXX: implement SMRAM.D_LOCK */ |
| pci_default_write_config(dev, address, val, len); |
| if (ranges_overlap(address, len, I440FX_PAM, I440FX_PAM_SIZE) || |
| range_covers_byte(address, len, I440FX_SMRAM)) { |
| i440fx_update_memory_mappings(d); |
| } |
| } |
| |
| static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id) |
| { |
| PCII440FXState *d = opaque; |
| PCIDevice *pd = PCI_DEVICE(d); |
| int ret, i; |
| uint8_t smm_enabled; |
| |
| ret = pci_device_load(pd, f); |
| if (ret < 0) |
| return ret; |
| i440fx_update_memory_mappings(d); |
| qemu_get_8s(f, &smm_enabled); |
| |
| if (version_id == 2) { |
| for (i = 0; i < PIIX_NUM_PIRQS; i++) { |
| qemu_get_be32(f); /* dummy load for compatibility */ |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int i440fx_post_load(void *opaque, int version_id) |
| { |
| PCII440FXState *d = opaque; |
| |
| i440fx_update_memory_mappings(d); |
| return 0; |
| } |
| |
| static const VMStateDescription vmstate_i440fx = { |
| .name = "I440FX", |
| .version_id = 3, |
| .minimum_version_id = 3, |
| .minimum_version_id_old = 1, |
| .load_state_old = i440fx_load_old, |
| .post_load = i440fx_post_load, |
| .fields = (VMStateField[]) { |
| VMSTATE_PCI_DEVICE(parent_obj, PCII440FXState), |
| /* Used to be smm_enabled, which was basically always zero because |
| * SeaBIOS hardly uses SMM. SMRAM is now handled by CPU code. |
| */ |
| VMSTATE_UNUSED(1), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static void i440fx_pcihost_get_pci_hole_start(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj); |
| uint64_t val64; |
| uint32_t value; |
| |
| val64 = range_is_empty(&s->pci_hole) ? 0 : range_lob(&s->pci_hole); |
| value = val64; |
| assert(value == val64); |
| visit_type_uint32(v, name, &value, errp); |
| } |
| |
| static void i440fx_pcihost_get_pci_hole_end(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj); |
| uint64_t val64; |
| uint32_t value; |
| |
| val64 = range_is_empty(&s->pci_hole) ? 0 : range_upb(&s->pci_hole) + 1; |
| value = val64; |
| assert(value == val64); |
| visit_type_uint32(v, name, &value, errp); |
| } |
| |
| static void i440fx_pcihost_get_pci_hole64_start(Object *obj, Visitor *v, |
| const char *name, |
| void *opaque, Error **errp) |
| { |
| PCIHostState *h = PCI_HOST_BRIDGE(obj); |
| Range w64; |
| uint64_t value; |
| |
| pci_bus_get_w64_range(h->bus, &w64); |
| value = range_is_empty(&w64) ? 0 : range_lob(&w64); |
| visit_type_uint64(v, name, &value, errp); |
| } |
| |
| static void i440fx_pcihost_get_pci_hole64_end(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| PCIHostState *h = PCI_HOST_BRIDGE(obj); |
| Range w64; |
| uint64_t value; |
| |
| pci_bus_get_w64_range(h->bus, &w64); |
| value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1; |
| visit_type_uint64(v, name, &value, errp); |
| } |
| |
| static void i440fx_pcihost_initfn(Object *obj) |
| { |
| PCIHostState *s = PCI_HOST_BRIDGE(obj); |
| |
| memory_region_init_io(&s->conf_mem, obj, &pci_host_conf_le_ops, s, |
| "pci-conf-idx", 4); |
| memory_region_init_io(&s->data_mem, obj, &pci_host_data_le_ops, s, |
| "pci-conf-data", 4); |
| |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "int", |
| i440fx_pcihost_get_pci_hole_start, |
| NULL, NULL, NULL, NULL); |
| |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "int", |
| i440fx_pcihost_get_pci_hole_end, |
| NULL, NULL, NULL, NULL); |
| |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "int", |
| i440fx_pcihost_get_pci_hole64_start, |
| NULL, NULL, NULL, NULL); |
| |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "int", |
| i440fx_pcihost_get_pci_hole64_end, |
| NULL, NULL, NULL, NULL); |
| } |
| |
| static void i440fx_pcihost_realize(DeviceState *dev, Error **errp) |
| { |
| PCIHostState *s = PCI_HOST_BRIDGE(dev); |
| SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
| |
| sysbus_add_io(sbd, 0xcf8, &s->conf_mem); |
| sysbus_init_ioports(sbd, 0xcf8, 4); |
| |
| sysbus_add_io(sbd, 0xcfc, &s->data_mem); |
| sysbus_init_ioports(sbd, 0xcfc, 4); |
| } |
| |
| static void i440fx_realize(PCIDevice *dev, Error **errp) |
| { |
| dev->config[I440FX_SMRAM] = 0x02; |
| |
| if (object_property_get_bool(qdev_get_machine(), "iommu", NULL)) { |
| error_report("warning: i440fx doesn't support emulated iommu"); |
| } |
| } |
| |
| PCIBus *i440fx_init(const char *host_type, const char *pci_type, |
| PCII440FXState **pi440fx_state, |
| int *piix3_devfn, |
| ISABus **isa_bus, qemu_irq *pic, |
| MemoryRegion *address_space_mem, |
| MemoryRegion *address_space_io, |
| ram_addr_t ram_size, |
| ram_addr_t below_4g_mem_size, |
| ram_addr_t above_4g_mem_size, |
| MemoryRegion *pci_address_space, |
| MemoryRegion *ram_memory) |
| { |
| DeviceState *dev; |
| PCIBus *b; |
| PCIDevice *d; |
| PCIHostState *s; |
| PIIX3State *piix3; |
| PCII440FXState *f; |
| unsigned i; |
| I440FXState *i440fx; |
| |
| dev = qdev_create(NULL, host_type); |
| s = PCI_HOST_BRIDGE(dev); |
| b = pci_bus_new(dev, NULL, pci_address_space, |
| address_space_io, 0, TYPE_PCI_BUS); |
| s->bus = b; |
| object_property_add_child(qdev_get_machine(), "i440fx", OBJECT(dev), NULL); |
| qdev_init_nofail(dev); |
| |
| d = pci_create_simple(b, 0, pci_type); |
| *pi440fx_state = I440FX_PCI_DEVICE(d); |
| f = *pi440fx_state; |
| f->system_memory = address_space_mem; |
| f->pci_address_space = pci_address_space; |
| f->ram_memory = ram_memory; |
| |
| i440fx = I440FX_PCI_HOST_BRIDGE(dev); |
| range_set_bounds(&i440fx->pci_hole, below_4g_mem_size, |
| IO_APIC_DEFAULT_ADDRESS - 1); |
| |
| /* setup pci memory mapping */ |
| pc_pci_as_mapping_init(OBJECT(f), f->system_memory, |
| f->pci_address_space); |
| |
| /* if *disabled* show SMRAM to all CPUs */ |
| memory_region_init_alias(&f->smram_region, OBJECT(d), "smram-region", |
| f->pci_address_space, 0xa0000, 0x20000); |
| memory_region_add_subregion_overlap(f->system_memory, 0xa0000, |
| &f->smram_region, 1); |
| memory_region_set_enabled(&f->smram_region, true); |
| |
| /* smram, as seen by SMM CPUs */ |
| memory_region_init(&f->smram, OBJECT(d), "smram", 1ull << 32); |
| memory_region_set_enabled(&f->smram, true); |
| memory_region_init_alias(&f->low_smram, OBJECT(d), "smram-low", |
| f->ram_memory, 0xa0000, 0x20000); |
| memory_region_set_enabled(&f->low_smram, true); |
| memory_region_add_subregion(&f->smram, 0xa0000, &f->low_smram); |
| object_property_add_const_link(qdev_get_machine(), "smram", |
| OBJECT(&f->smram), &error_abort); |
| |
| init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space, |
| &f->pam_regions[0], PAM_BIOS_BASE, PAM_BIOS_SIZE); |
| for (i = 0; i < 12; ++i) { |
| init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space, |
| &f->pam_regions[i+1], PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, |
| PAM_EXPAN_SIZE); |
| } |
| |
| /* Xen supports additional interrupt routes from the PCI devices to |
| * the IOAPIC: the four pins of each PCI device on the bus are also |
| * connected to the IOAPIC directly. |
| * These additional routes can be discovered through ACPI. */ |
| if (xen_enabled()) { |
| PCIDevice *pci_dev = pci_create_simple_multifunction(b, |
| -1, true, "PIIX3-xen"); |
| piix3 = PIIX3_PCI_DEVICE(pci_dev); |
| pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq, |
| piix3, XEN_PIIX_NUM_PIRQS); |
| } else { |
| PCIDevice *pci_dev = pci_create_simple_multifunction(b, |
| -1, true, "PIIX3"); |
| piix3 = PIIX3_PCI_DEVICE(pci_dev); |
| pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, |
| PIIX_NUM_PIRQS); |
| pci_bus_set_route_irq_fn(b, piix3_route_intx_pin_to_irq); |
| } |
| piix3->pic = pic; |
| *isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix3), "isa.0")); |
| |
| *piix3_devfn = piix3->dev.devfn; |
| |
| ram_size = ram_size / 8 / 1024 / 1024; |
| if (ram_size > 255) { |
| ram_size = 255; |
| } |
| d->config[I440FX_COREBOOT_RAM_SIZE] = ram_size; |
| |
| i440fx_update_memory_mappings(f); |
| |
| return b; |
| } |
| |
| PCIBus *find_i440fx(void) |
| { |
| PCIHostState *s = OBJECT_CHECK(PCIHostState, |
| object_resolve_path("/machine/i440fx", NULL), |
| TYPE_PCI_HOST_BRIDGE); |
| return s ? s->bus : NULL; |
| } |
| |
| /* PIIX3 PCI to ISA bridge */ |
| static void piix3_set_irq_pic(PIIX3State *piix3, int pic_irq) |
| { |
| qemu_set_irq(piix3->pic[pic_irq], |
| !!(piix3->pic_levels & |
| (((1ULL << PIIX_NUM_PIRQS) - 1) << |
| (pic_irq * PIIX_NUM_PIRQS)))); |
| } |
| |
| static void piix3_set_irq_level_internal(PIIX3State *piix3, int pirq, int level) |
| { |
| int pic_irq; |
| uint64_t mask; |
| |
| pic_irq = piix3->dev.config[PIIX_PIRQC + pirq]; |
| if (pic_irq >= PIIX_NUM_PIC_IRQS) { |
| return; |
| } |
| |
| mask = 1ULL << ((pic_irq * PIIX_NUM_PIRQS) + pirq); |
| piix3->pic_levels &= ~mask; |
| piix3->pic_levels |= mask * !!level; |
| } |
| |
| static void piix3_set_irq_level(PIIX3State *piix3, int pirq, int level) |
| { |
| int pic_irq; |
| |
| pic_irq = piix3->dev.config[PIIX_PIRQC + pirq]; |
| if (pic_irq >= PIIX_NUM_PIC_IRQS) { |
| return; |
| } |
| |
| piix3_set_irq_level_internal(piix3, pirq, level); |
| |
| piix3_set_irq_pic(piix3, pic_irq); |
| } |
| |
| static void piix3_set_irq(void *opaque, int pirq, int level) |
| { |
| PIIX3State *piix3 = opaque; |
| piix3_set_irq_level(piix3, pirq, level); |
| } |
| |
| static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pin) |
| { |
| PIIX3State *piix3 = opaque; |
| int irq = piix3->dev.config[PIIX_PIRQC + pin]; |
| PCIINTxRoute route; |
| |
| if (irq < PIIX_NUM_PIC_IRQS) { |
| route.mode = PCI_INTX_ENABLED; |
| route.irq = irq; |
| } else { |
| route.mode = PCI_INTX_DISABLED; |
| route.irq = -1; |
| } |
| return route; |
| } |
| |
| /* irq routing is changed. so rebuild bitmap */ |
| static void piix3_update_irq_levels(PIIX3State *piix3) |
| { |
| int pirq; |
| |
| piix3->pic_levels = 0; |
| for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) { |
| piix3_set_irq_level(piix3, pirq, |
| pci_bus_get_irq_level(piix3->dev.bus, pirq)); |
| } |
| } |
| |
| static void piix3_write_config(PCIDevice *dev, |
| uint32_t address, uint32_t val, int len) |
| { |
| pci_default_write_config(dev, address, val, len); |
| if (ranges_overlap(address, len, PIIX_PIRQC, 4)) { |
| PIIX3State *piix3 = PIIX3_PCI_DEVICE(dev); |
| int pic_irq; |
| |
| pci_bus_fire_intx_routing_notifier(piix3->dev.bus); |
| piix3_update_irq_levels(piix3); |
| for (pic_irq = 0; pic_irq < PIIX_NUM_PIC_IRQS; pic_irq++) { |
| piix3_set_irq_pic(piix3, pic_irq); |
| } |
| } |
| } |
| |
| static void piix3_write_config_xen(PCIDevice *dev, |
| uint32_t address, uint32_t val, int len) |
| { |
| xen_piix_pci_write_config_client(address, val, len); |
| piix3_write_config(dev, address, val, len); |
| } |
| |
| static void piix3_reset(void *opaque) |
| { |
| PIIX3State *d = opaque; |
| 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] = 0x80; |
| pci_conf[0x61] = 0x80; |
| pci_conf[0x62] = 0x80; |
| pci_conf[0x63] = 0x80; |
| 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; |
| |
| d->pic_levels = 0; |
| d->rcr = 0; |
| } |
| |
| static int piix3_post_load(void *opaque, int version_id) |
| { |
| PIIX3State *piix3 = opaque; |
| int pirq; |
| |
| /* Because the i8259 has not been deserialized yet, qemu_irq_raise |
| * might bring the system to a different state than the saved one; |
| * for example, the interrupt could be masked but the i8259 would |
| * not know that yet and would trigger an interrupt in the CPU. |
| * |
| * Here, we update irq levels without raising the interrupt. |
| * Interrupt state will be deserialized separately through the i8259. |
| */ |
| piix3->pic_levels = 0; |
| for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) { |
| piix3_set_irq_level_internal(piix3, pirq, |
| pci_bus_get_irq_level(piix3->dev.bus, pirq)); |
| } |
| return 0; |
| } |
| |
| static void piix3_pre_save(void *opaque) |
| { |
| int i; |
| PIIX3State *piix3 = opaque; |
| |
| for (i = 0; i < ARRAY_SIZE(piix3->pci_irq_levels_vmstate); i++) { |
| piix3->pci_irq_levels_vmstate[i] = |
| pci_bus_get_irq_level(piix3->dev.bus, i); |
| } |
| } |
| |
| static bool piix3_rcr_needed(void *opaque) |
| { |
| PIIX3State *piix3 = opaque; |
| |
| return (piix3->rcr != 0); |
| } |
| |
| static const VMStateDescription vmstate_piix3_rcr = { |
| .name = "PIIX3/rcr", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .needed = piix3_rcr_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT8(rcr, PIIX3State), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_piix3 = { |
| .name = "PIIX3", |
| .version_id = 3, |
| .minimum_version_id = 2, |
| .post_load = piix3_post_load, |
| .pre_save = piix3_pre_save, |
| .fields = (VMStateField[]) { |
| VMSTATE_PCI_DEVICE(dev, PIIX3State), |
| VMSTATE_INT32_ARRAY_V(pci_irq_levels_vmstate, PIIX3State, |
| PIIX_NUM_PIRQS, 3), |
| VMSTATE_END_OF_LIST() |
| }, |
| .subsections = (const VMStateDescription*[]) { |
| &vmstate_piix3_rcr, |
| NULL |
| } |
| }; |
| |
| |
| static void rcr_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) |
| { |
| PIIX3State *d = opaque; |
| |
| if (val & 4) { |
| qemu_system_reset_request(); |
| return; |
| } |
| d->rcr = val & 2; /* keep System Reset type only */ |
| } |
| |
| static uint64_t rcr_read(void *opaque, hwaddr addr, unsigned len) |
| { |
| PIIX3State *d = opaque; |
| |
| return d->rcr; |
| } |
| |
| static const MemoryRegionOps rcr_ops = { |
| .read = rcr_read, |
| .write = rcr_write, |
| .endianness = DEVICE_LITTLE_ENDIAN |
| }; |
| |
| static void piix3_realize(PCIDevice *dev, Error **errp) |
| { |
| PIIX3State *d = PIIX3_PCI_DEVICE(dev); |
| |
| if (!isa_bus_new(DEVICE(d), get_system_memory(), |
| pci_address_space_io(dev), errp)) { |
| return; |
| } |
| |
| memory_region_init_io(&d->rcr_mem, OBJECT(dev), &rcr_ops, d, |
| "piix3-reset-control", 1); |
| memory_region_add_subregion_overlap(pci_address_space_io(dev), RCR_IOPORT, |
| &d->rcr_mem, 1); |
| |
| qemu_register_reset(piix3_reset, d); |
| } |
| |
| static void pci_piix3_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| dc->desc = "ISA bridge"; |
| dc->vmsd = &vmstate_piix3; |
| dc->hotpluggable = false; |
| k->realize = piix3_realize; |
| k->vendor_id = PCI_VENDOR_ID_INTEL; |
| /* 82371SB PIIX3 PCI-to-ISA bridge (Step A1) */ |
| k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0; |
| k->class_id = PCI_CLASS_BRIDGE_ISA; |
| /* |
| * Reason: part of PIIX3 southbridge, needs to be wired up by |
| * pc_piix.c's pc_init1() |
| */ |
| dc->cannot_instantiate_with_device_add_yet = true; |
| } |
| |
| static const TypeInfo piix3_pci_type_info = { |
| .name = TYPE_PIIX3_PCI_DEVICE, |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PIIX3State), |
| .abstract = true, |
| .class_init = pci_piix3_class_init, |
| }; |
| |
| static void piix3_class_init(ObjectClass *klass, void *data) |
| { |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->config_write = piix3_write_config; |
| } |
| |
| static const TypeInfo piix3_info = { |
| .name = "PIIX3", |
| .parent = TYPE_PIIX3_PCI_DEVICE, |
| .class_init = piix3_class_init, |
| }; |
| |
| static void piix3_xen_class_init(ObjectClass *klass, void *data) |
| { |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->config_write = piix3_write_config_xen; |
| }; |
| |
| static const TypeInfo piix3_xen_info = { |
| .name = "PIIX3-xen", |
| .parent = TYPE_PIIX3_PCI_DEVICE, |
| .class_init = piix3_xen_class_init, |
| }; |
| |
| static void i440fx_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->realize = i440fx_realize; |
| k->config_write = i440fx_write_config; |
| k->vendor_id = PCI_VENDOR_ID_INTEL; |
| k->device_id = PCI_DEVICE_ID_INTEL_82441; |
| k->revision = 0x02; |
| k->class_id = PCI_CLASS_BRIDGE_HOST; |
| dc->desc = "Host bridge"; |
| dc->vmsd = &vmstate_i440fx; |
| /* |
| * PCI-facing part of the host bridge, not usable without the |
| * host-facing part, which can't be device_add'ed, yet. |
| */ |
| dc->cannot_instantiate_with_device_add_yet = true; |
| dc->hotpluggable = false; |
| } |
| |
| static const TypeInfo i440fx_info = { |
| .name = TYPE_I440FX_PCI_DEVICE, |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PCII440FXState), |
| .class_init = i440fx_class_init, |
| }; |
| |
| /* IGD Passthrough Host Bridge. */ |
| typedef struct { |
| uint8_t offset; |
| uint8_t len; |
| } IGDHostInfo; |
| |
| /* Here we just expose minimal host bridge offset subset. */ |
| static const IGDHostInfo igd_host_bridge_infos[] = { |
| {0x08, 2}, /* revision id */ |
| {0x2c, 2}, /* sybsystem vendor id */ |
| {0x2e, 2}, /* sybsystem id */ |
| {0x50, 2}, /* SNB: processor graphics control register */ |
| {0x52, 2}, /* processor graphics control register */ |
| {0xa4, 4}, /* SNB: graphics base of stolen memory */ |
| {0xa8, 4}, /* SNB: base of GTT stolen memory */ |
| }; |
| |
| static int host_pci_config_read(int pos, int len, uint32_t *val) |
| { |
| char path[PATH_MAX]; |
| int config_fd; |
| ssize_t size = sizeof(path); |
| /* Access real host bridge. */ |
| int rc = snprintf(path, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s", |
| 0, 0, 0, 0, "config"); |
| int ret = 0; |
| |
| if (rc >= size || rc < 0) { |
| return -ENODEV; |
| } |
| |
| config_fd = open(path, O_RDWR); |
| if (config_fd < 0) { |
| return -ENODEV; |
| } |
| |
| if (lseek(config_fd, pos, SEEK_SET) != pos) { |
| ret = -errno; |
| goto out; |
| } |
| |
| do { |
| rc = read(config_fd, (uint8_t *)val, len); |
| } while (rc < 0 && (errno == EINTR || errno == EAGAIN)); |
| if (rc != len) { |
| ret = -errno; |
| } |
| |
| out: |
| close(config_fd); |
| return ret; |
| } |
| |
| static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev) |
| { |
| uint32_t val = 0; |
| int rc, i, num; |
| int pos, len; |
| |
| num = ARRAY_SIZE(igd_host_bridge_infos); |
| for (i = 0; i < num; i++) { |
| pos = igd_host_bridge_infos[i].offset; |
| len = igd_host_bridge_infos[i].len; |
| rc = host_pci_config_read(pos, len, &val); |
| if (rc) { |
| return -ENODEV; |
| } |
| pci_default_write_config(pci_dev, pos, val, len); |
| } |
| |
| return 0; |
| } |
| |
| static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->init = igd_pt_i440fx_initfn; |
| dc->desc = "IGD Passthrough Host bridge"; |
| } |
| |
| static const TypeInfo igd_passthrough_i440fx_info = { |
| .name = TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE, |
| .parent = TYPE_I440FX_PCI_DEVICE, |
| .instance_size = sizeof(PCII440FXState), |
| .class_init = igd_passthrough_i440fx_class_init, |
| }; |
| |
| static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge, |
| PCIBus *rootbus) |
| { |
| I440FXState *s = I440FX_PCI_HOST_BRIDGE(host_bridge); |
| |
| /* For backwards compat with old device paths */ |
| if (s->short_root_bus) { |
| return "0000"; |
| } |
| return "0000:00"; |
| } |
| |
| static Property i440fx_props[] = { |
| DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, I440FXState, |
| pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE), |
| DEFINE_PROP_UINT32("short_root_bus", I440FXState, short_root_bus, 0), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void i440fx_pcihost_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); |
| |
| hc->root_bus_path = i440fx_pcihost_root_bus_path; |
| dc->realize = i440fx_pcihost_realize; |
| dc->fw_name = "pci"; |
| dc->props = i440fx_props; |
| /* Reason: needs to be wired up by pc_init1 */ |
| dc->cannot_instantiate_with_device_add_yet = true; |
| } |
| |
| static const TypeInfo i440fx_pcihost_info = { |
| .name = TYPE_I440FX_PCI_HOST_BRIDGE, |
| .parent = TYPE_PCI_HOST_BRIDGE, |
| .instance_size = sizeof(I440FXState), |
| .instance_init = i440fx_pcihost_initfn, |
| .class_init = i440fx_pcihost_class_init, |
| }; |
| |
| static void i440fx_register_types(void) |
| { |
| type_register_static(&i440fx_info); |
| type_register_static(&igd_passthrough_i440fx_info); |
| type_register_static(&piix3_pci_type_info); |
| type_register_static(&piix3_info); |
| type_register_static(&piix3_xen_info); |
| type_register_static(&i440fx_pcihost_info); |
| } |
| |
| type_init(i440fx_register_types) |
