| /* |
| * 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; |
| |
| struct PCII440FXState { |
| PCIDevice dev; |
| target_phys_addr_t isa_page_descs[384 / 4]; |
| uint8_t smm_enabled; |
| PIIX3State *piix3; |
| }; |
| |
| |
| #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) |
| { |
| uint32_t addr; |
| |
| // printf("ISA mapping %08x-0x%08x: %d\n", start, end, r); |
| switch(r) { |
| case 3: |
| /* RAM */ |
| cpu_register_physical_memory(start, end - start, |
| start); |
| break; |
| case 1: |
| /* ROM (XXX: not quite correct) */ |
| cpu_register_physical_memory(start, end - start, |
| start | IO_MEM_ROM); |
| break; |
| case 2: |
| case 0: |
| /* XXX: should distinguish read/write cases */ |
| for(addr = start; addr < end; addr += 4096) { |
| cpu_register_physical_memory(addr, 4096, |
| d->isa_page_descs[(addr - 0xa0000) >> 12]); |
| } |
| break; |
| } |
| } |
| |
| static void i440fx_update_memory_mappings(PCII440FXState *d) |
| { |
| int i, r; |
| uint32_t smram, addr; |
| |
| update_pam(d, 0xf0000, 0x100000, (d->dev.config[I440FX_PAM] >> 4) & 3); |
| 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); |
| } |
| smram = d->dev.config[I440FX_SMRAM]; |
| if ((d->smm_enabled && (smram & 0x08)) || (smram & 0x40)) { |
| cpu_register_physical_memory(0xa0000, 0x20000, 0xa0000); |
| } else { |
| for(addr = 0xa0000; addr < 0xc0000; addr += 4096) { |
| cpu_register_physical_memory(addr, 4096, |
| d->isa_page_descs[(addr - 0xa0000) >> 12]); |
| } |
| } |
| } |
| |
| 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); |
| } |
| } |
| |
| |
| /* XXX: suppress when better memory API. We make the assumption that |
| no device (in particular the VGA) changes the memory mappings in |
| the 0xa0000-0x100000 range */ |
| void i440fx_init_memory_mappings(PCII440FXState *d) |
| { |
| int i; |
| for(i = 0; i < 96; i++) { |
| d->isa_page_descs[i] = cpu_get_physical_page_desc(0xa0000 + i * 0x1000); |
| } |
| } |
| |
| 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); |
| |
| pci_host_conf_register_ioport(0xcf8, s); |
| |
| pci_host_data_register_ioport(0xcfc, s); |
| 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, |
| qemu_irq *pic, ram_addr_t ram_size) |
| { |
| DeviceState *dev; |
| PCIBus *b; |
| PCIDevice *d; |
| I440FXState *s; |
| PIIX3State *piix3; |
| |
| dev = qdev_create(NULL, "i440FX-pcihost"); |
| s = FROM_SYSBUS(I440FXState, sysbus_from_qdev(dev)); |
| b = pci_bus_new(&s->busdev.qdev, NULL, 0); |
| s->bus = b; |
| qdev_init_nofail(dev); |
| |
| d = pci_create_simple(b, 0, device_name); |
| *pi440fx_state = DO_UPCAST(PCII440FXState, dev, d); |
| |
| /* 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; |
| |
| (*pi440fx_state)->piix3 = piix3; |
| |
| *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; |
| |
| return b; |
| } |
| |
| PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, |
| qemu_irq *pic, ram_addr_t ram_size) |
| { |
| PCIBus *b; |
| |
| b = i440fx_common_init("i440FX", pi440fx_state, piix3_devfn, pic, ram_size); |
| 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); |
| qemu_register_reset(piix3_reset, d); |
| return 0; |
| } |
| |
| static PCIDeviceInfo i440fx_info[] = { |
| { |
| .qdev.name = "i440FX", |
| .qdev.desc = "Host bridge", |
| .qdev.size = sizeof(PCII440FXState), |
| .qdev.vmsd = &vmstate_i440fx, |
| .qdev.no_user = 1, |
| .no_hotplug = 1, |
| .init = i440fx_initfn, |
| .config_write = i440fx_write_config, |
| .vendor_id = PCI_VENDOR_ID_INTEL, |
| .device_id = PCI_DEVICE_ID_INTEL_82441, |
| .revision = 0x02, |
| .class_id = PCI_CLASS_BRIDGE_HOST, |
| },{ |
| .qdev.name = "PIIX3", |
| .qdev.desc = "ISA bridge", |
| .qdev.size = sizeof(PIIX3State), |
| .qdev.vmsd = &vmstate_piix3, |
| .qdev.no_user = 1, |
| .no_hotplug = 1, |
| .init = piix3_initfn, |
| .config_write = piix3_write_config, |
| .vendor_id = PCI_VENDOR_ID_INTEL, |
| .device_id = PCI_DEVICE_ID_INTEL_82371SB_0, // 82371SB PIIX3 PCI-to-ISA bridge (Step A1) |
| .class_id = PCI_CLASS_BRIDGE_ISA, |
| },{ |
| .qdev.name = "PIIX3-xen", |
| .qdev.desc = "ISA bridge", |
| .qdev.size = sizeof(PIIX3State), |
| .qdev.vmsd = &vmstate_piix3, |
| .qdev.no_user = 1, |
| .no_hotplug = 1, |
| .init = piix3_initfn, |
| .config_write = piix3_write_config_xen, |
| .vendor_id = PCI_VENDOR_ID_INTEL, |
| .device_id = PCI_DEVICE_ID_INTEL_82371SB_0, // 82371SB PIIX3 PCI-to-ISA bridge (Step A1) |
| .class_id = PCI_CLASS_BRIDGE_ISA, |
| },{ |
| /* end of list */ |
| } |
| }; |
| |
| static SysBusDeviceInfo i440fx_pcihost_info = { |
| .init = i440fx_pcihost_initfn, |
| .qdev.name = "i440FX-pcihost", |
| .qdev.fw_name = "pci", |
| .qdev.size = sizeof(I440FXState), |
| .qdev.no_user = 1, |
| }; |
| |
| static void i440fx_register(void) |
| { |
| sysbus_register_withprop(&i440fx_pcihost_info); |
| pci_qdev_register_many(i440fx_info); |
| } |
| device_init(i440fx_register); |
