| /* |
| * 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 "hw.h" |
| #include "pc.h" |
| #include "pci.h" |
| #include "pci_host.h" |
| #include "isa.h" |
| #include "sysbus.h" |
| #include "range.h" |
| #include "xen.h" |
| |
| /* |
| * I440FX chipset data sheet. |
| * http://download.intel.com/design/chipsets/datashts/29054901.pdf |
| */ |
| |
| typedef PCIHostState 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 |
| |
| 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]; |
| } PIIX3State; |
| |
| typedef struct PAMMemoryRegion { |
| MemoryRegion mem; |
| bool initialized; |
| } PAMMemoryRegion; |
| |
| struct PCII440FXState { |
| PCIDevice dev; |
| MemoryRegion *system_memory; |
| MemoryRegion *pci_address_space; |
| MemoryRegion *ram_memory; |
| MemoryRegion pci_hole; |
| MemoryRegion pci_hole_64bit; |
| PAMMemoryRegion pam_regions[13]; |
| MemoryRegion smram_region; |
| uint8_t smm_enabled; |
| }; |
| |
| |
| #define I440FX_PAM 0x59 |
| #define I440FX_PAM_SIZE 7 |
| #define I440FX_SMRAM 0x72 |
| |
| static void piix3_set_irq(void *opaque, int pirq, int level); |
| 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 update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r, |
| PAMMemoryRegion *mem) |
| { |
| if (mem->initialized) { |
| memory_region_del_subregion(d->system_memory, &mem->mem); |
| memory_region_destroy(&mem->mem); |
| } |
| |
| // printf("ISA mapping %08x-0x%08x: %d\n", start, end, r); |
| switch(r) { |
| case 3: |
| /* RAM */ |
| memory_region_init_alias(&mem->mem, "pam-ram", d->ram_memory, |
| start, end - start); |
| break; |
| case 1: |
| /* ROM (XXX: not quite correct) */ |
| memory_region_init_alias(&mem->mem, "pam-rom", d->ram_memory, |
| start, end - start); |
| memory_region_set_readonly(&mem->mem, true); |
| break; |
| case 2: |
| case 0: |
| /* XXX: should distinguish read/write cases */ |
| memory_region_init_alias(&mem->mem, "pam-pci", d->pci_address_space, |
| start, end - start); |
| break; |
| } |
| memory_region_add_subregion_overlap(d->system_memory, |
| start, &mem->mem, 1); |
| mem->initialized = true; |
| } |
| |
| static void i440fx_update_memory_mappings(PCII440FXState *d) |
| { |
| int i, r; |
| uint32_t smram; |
| bool smram_enabled; |
| |
| memory_region_transaction_begin(); |
| update_pam(d, 0xf0000, 0x100000, (d->dev.config[I440FX_PAM] >> 4) & 3, |
| &d->pam_regions[0]); |
| for(i = 0; i < 12; i++) { |
| r = (d->dev.config[(i >> 1) + (I440FX_PAM + 1)] >> ((i & 1) * 4)) & 3; |
| update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r, |
| &d->pam_regions[i+1]); |
| } |
| smram = d->dev.config[I440FX_SMRAM]; |
| smram_enabled = (d->smm_enabled && (smram & 0x08)) || (smram & 0x40); |
| memory_region_set_enabled(&d->smram_region, !smram_enabled); |
| memory_region_transaction_commit(); |
| } |
| |
| static void i440fx_set_smm(int val, void *arg) |
| { |
| PCII440FXState *d = arg; |
| |
| val = (val != 0); |
| if (d->smm_enabled != val) { |
| d->smm_enabled = val; |
| i440fx_update_memory_mappings(d); |
| } |
| } |
| |
| |
| static void i440fx_write_config(PCIDevice *dev, |
| uint32_t address, uint32_t val, int len) |
| { |
| PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, 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; |
| int ret, i; |
| |
| ret = pci_device_load(&d->dev, f); |
| if (ret < 0) |
| return ret; |
| i440fx_update_memory_mappings(d); |
| qemu_get_8s(f, &d->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(dev, PCII440FXState), |
| VMSTATE_UINT8(smm_enabled, PCII440FXState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static int i440fx_pcihost_initfn(SysBusDevice *dev) |
| { |
| I440FXState *s = FROM_SYSBUS(I440FXState, dev); |
| |
| memory_region_init_io(&s->conf_mem, &pci_host_conf_le_ops, s, |
| "pci-conf-idx", 4); |
| sysbus_add_io(dev, 0xcf8, &s->conf_mem); |
| sysbus_init_ioports(&s->busdev, 0xcf8, 4); |
| |
| memory_region_init_io(&s->data_mem, &pci_host_data_le_ops, s, |
| "pci-conf-data", 4); |
| sysbus_add_io(dev, 0xcfc, &s->data_mem); |
| sysbus_init_ioports(&s->busdev, 0xcfc, 4); |
| |
| return 0; |
| } |
| |
| static int i440fx_initfn(PCIDevice *dev) |
| { |
| PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev); |
| |
| d->dev.config[I440FX_SMRAM] = 0x02; |
| |
| cpu_smm_register(&i440fx_set_smm, d); |
| return 0; |
| } |
| |
| static PCIBus *i440fx_common_init(const char *device_name, |
| 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, |
| target_phys_addr_t pci_hole_start, |
| target_phys_addr_t pci_hole_size, |
| target_phys_addr_t pci_hole64_start, |
| target_phys_addr_t pci_hole64_size, |
| MemoryRegion *pci_address_space, |
| MemoryRegion *ram_memory) |
| { |
| DeviceState *dev; |
| PCIBus *b; |
| PCIDevice *d; |
| I440FXState *s; |
| PIIX3State *piix3; |
| PCII440FXState *f; |
| |
| dev = qdev_create(NULL, "i440FX-pcihost"); |
| s = FROM_SYSBUS(I440FXState, sysbus_from_qdev(dev)); |
| s->address_space = address_space_mem; |
| b = pci_bus_new(&s->busdev.qdev, NULL, pci_address_space, |
| address_space_io, 0); |
| s->bus = b; |
| object_property_add_child(qdev_get_machine(), "i440fx", OBJECT(dev), NULL); |
| qdev_init_nofail(dev); |
| |
| d = pci_create_simple(b, 0, device_name); |
| *pi440fx_state = DO_UPCAST(PCII440FXState, dev, d); |
| f = *pi440fx_state; |
| f->system_memory = address_space_mem; |
| f->pci_address_space = pci_address_space; |
| f->ram_memory = ram_memory; |
| memory_region_init_alias(&f->pci_hole, "pci-hole", f->pci_address_space, |
| pci_hole_start, pci_hole_size); |
| memory_region_add_subregion(f->system_memory, pci_hole_start, &f->pci_hole); |
| memory_region_init_alias(&f->pci_hole_64bit, "pci-hole64", |
| f->pci_address_space, |
| pci_hole64_start, pci_hole64_size); |
| if (pci_hole64_size) { |
| memory_region_add_subregion(f->system_memory, pci_hole64_start, |
| &f->pci_hole_64bit); |
| } |
| memory_region_init_alias(&f->smram_region, "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, false); |
| |
| /* 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()) { |
| piix3 = DO_UPCAST(PIIX3State, dev, |
| pci_create_simple_multifunction(b, -1, true, "PIIX3-xen")); |
| pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq, |
| piix3, XEN_PIIX_NUM_PIRQS); |
| } else { |
| piix3 = DO_UPCAST(PIIX3State, dev, |
| pci_create_simple_multifunction(b, -1, true, "PIIX3")); |
| pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, |
| PIIX_NUM_PIRQS); |
| } |
| piix3->pic = pic; |
| *isa_bus = DO_UPCAST(ISABus, qbus, |
| qdev_get_child_bus(&piix3->dev.qdev, "isa.0")); |
| |
| *piix3_devfn = piix3->dev.devfn; |
| |
| ram_size = ram_size / 8 / 1024 / 1024; |
| if (ram_size > 255) |
| ram_size = 255; |
| (*pi440fx_state)->dev.config[0x57]=ram_size; |
| |
| i440fx_update_memory_mappings(f); |
| |
| return b; |
| } |
| |
| PCIBus *i440fx_init(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, |
| target_phys_addr_t pci_hole_start, |
| target_phys_addr_t pci_hole_size, |
| target_phys_addr_t pci_hole64_start, |
| target_phys_addr_t pci_hole64_size, |
| MemoryRegion *pci_memory, MemoryRegion *ram_memory) |
| |
| { |
| PCIBus *b; |
| |
| b = i440fx_common_init("i440FX", pi440fx_state, piix3_devfn, isa_bus, pic, |
| address_space_mem, address_space_io, ram_size, |
| pci_hole_start, pci_hole_size, |
| pci_hole64_start, pci_hole64_size, |
| pci_memory, ram_memory); |
| return b; |
| } |
| |
| /* 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(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; |
| |
| 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); |
| } |
| |
| /* 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 = DO_UPCAST(PIIX3State, dev, dev); |
| int pic_irq; |
| 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; |
| } |
| |
| static int piix3_post_load(void *opaque, int version_id) |
| { |
| PIIX3State *piix3 = opaque; |
| piix3_update_irq_levels(piix3); |
| 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 const VMStateDescription vmstate_piix3 = { |
| .name = "PIIX3", |
| .version_id = 3, |
| .minimum_version_id = 2, |
| .minimum_version_id_old = 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() |
| } |
| }; |
| |
| static int piix3_initfn(PCIDevice *dev) |
| { |
| PIIX3State *d = DO_UPCAST(PIIX3State, dev, dev); |
| |
| isa_bus_new(&d->dev.qdev, pci_address_space_io(dev)); |
| qemu_register_reset(piix3_reset, d); |
| return 0; |
| } |
| |
| static void 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->no_user = 1, |
| k->no_hotplug = 1; |
| k->init = piix3_initfn; |
| k->config_write = piix3_write_config; |
| k->vendor_id = PCI_VENDOR_ID_INTEL; |
| k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0; // 82371SB PIIX3 PCI-to-ISA bridge (Step A1) |
| k->class_id = PCI_CLASS_BRIDGE_ISA; |
| } |
| |
| static TypeInfo piix3_info = { |
| .name = "PIIX3", |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PIIX3State), |
| .class_init = piix3_class_init, |
| }; |
| |
| static void piix3_xen_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->no_user = 1; |
| k->no_hotplug = 1; |
| k->init = piix3_initfn; |
| k->config_write = piix3_write_config_xen; |
| k->vendor_id = PCI_VENDOR_ID_INTEL; |
| k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0; // 82371SB PIIX3 PCI-to-ISA bridge (Step A1) |
| k->class_id = PCI_CLASS_BRIDGE_ISA; |
| }; |
| |
| static TypeInfo piix3_xen_info = { |
| .name = "PIIX3-xen", |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PIIX3State), |
| .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->no_hotplug = 1; |
| k->init = i440fx_initfn; |
| 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->no_user = 1; |
| dc->vmsd = &vmstate_i440fx; |
| } |
| |
| static TypeInfo i440fx_info = { |
| .name = "i440FX", |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PCII440FXState), |
| .class_init = i440fx_class_init, |
| }; |
| |
| static void i440fx_pcihost_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
| |
| k->init = i440fx_pcihost_initfn; |
| dc->fw_name = "pci"; |
| dc->no_user = 1; |
| } |
| |
| static TypeInfo i440fx_pcihost_info = { |
| .name = "i440FX-pcihost", |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(I440FXState), |
| .class_init = i440fx_pcihost_class_init, |
| }; |
| |
| static void i440fx_register_types(void) |
| { |
| type_register_static(&i440fx_info); |
| type_register_static(&piix3_info); |
| type_register_static(&piix3_xen_info); |
| type_register_static(&i440fx_pcihost_info); |
| } |
| |
| type_init(i440fx_register_types) |
