1 /* 2 * QEMU Intel i82378 emulation (PCI to ISA bridge) 3 * 4 * Copyright (c) 2010-2011 Hervé Poussineau 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "hw/pci/pci_device.h" 22 #include "hw/irq.h" 23 #include "hw/intc/i8259.h" 24 #include "hw/timer/i8254.h" 25 #include "migration/vmstate.h" 26 #include "hw/audio/pcspk.h" 27 #include "qom/object.h" 28 29 #define TYPE_I82378 "i82378" 30 OBJECT_DECLARE_SIMPLE_TYPE(I82378State, I82378) 31 32 struct I82378State { 33 PCIDevice parent_obj; 34 35 qemu_irq cpu_intr; 36 qemu_irq *isa_irqs_in; 37 }; 38 39 static const VMStateDescription vmstate_i82378 = { 40 .name = "pci-i82378", 41 .version_id = 0, 42 .minimum_version_id = 0, 43 .fields = (VMStateField[]) { 44 VMSTATE_PCI_DEVICE(parent_obj, I82378State), 45 VMSTATE_END_OF_LIST() 46 }, 47 }; 48 49 static void i82378_request_out0_irq(void *opaque, int irq, int level) 50 { 51 I82378State *s = opaque; 52 qemu_set_irq(s->cpu_intr, level); 53 } 54 55 static void i82378_request_pic_irq(void *opaque, int irq, int level) 56 { 57 DeviceState *dev = opaque; 58 I82378State *s = I82378(dev); 59 60 qemu_set_irq(s->isa_irqs_in[irq], level); 61 } 62 63 static void i82378_realize(PCIDevice *pci, Error **errp) 64 { 65 DeviceState *dev = DEVICE(pci); 66 I82378State *s = I82378(dev); 67 uint8_t *pci_conf; 68 ISABus *isabus; 69 ISADevice *pit; 70 71 pci_conf = pci->config; 72 pci_set_word(pci_conf + PCI_COMMAND, 73 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 74 pci_set_word(pci_conf + PCI_STATUS, 75 PCI_STATUS_DEVSEL_MEDIUM); 76 77 pci_config_set_interrupt_pin(pci_conf, 1); /* interrupt pin 0 */ 78 79 isabus = isa_bus_new(dev, get_system_memory(), 80 pci_address_space_io(pci), errp); 81 if (!isabus) { 82 return; 83 } 84 85 /* This device has: 86 2 82C59 (irq) 87 1 82C54 (pit) 88 2 82C37 (dma) 89 NMI 90 Utility Bus Support Registers 91 92 All devices accept byte access only, except timer 93 */ 94 95 /* 2 82C59 (irq) */ 96 s->isa_irqs_in = i8259_init(isabus, 97 qemu_allocate_irq(i82378_request_out0_irq, 98 s, 0)); 99 isa_bus_register_input_irqs(isabus, s->isa_irqs_in); 100 101 /* 1 82C54 (pit) */ 102 pit = i8254_pit_init(isabus, 0x40, 0, NULL); 103 104 /* speaker */ 105 pcspk_init(isa_new(TYPE_PC_SPEAKER), isabus, pit); 106 107 /* 2 82C37 (dma) */ 108 isa_create_simple(isabus, "i82374"); 109 } 110 111 static void i82378_init(Object *obj) 112 { 113 DeviceState *dev = DEVICE(obj); 114 I82378State *s = I82378(obj); 115 116 qdev_init_gpio_out(dev, &s->cpu_intr, 1); 117 qdev_init_gpio_in(dev, i82378_request_pic_irq, 16); 118 } 119 120 static void i82378_class_init(ObjectClass *klass, void *data) 121 { 122 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 123 DeviceClass *dc = DEVICE_CLASS(klass); 124 125 k->realize = i82378_realize; 126 k->vendor_id = PCI_VENDOR_ID_INTEL; 127 k->device_id = PCI_DEVICE_ID_INTEL_82378; 128 k->revision = 0x03; 129 k->class_id = PCI_CLASS_BRIDGE_ISA; 130 dc->vmsd = &vmstate_i82378; 131 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 132 } 133 134 static const TypeInfo i82378_type_info = { 135 .name = TYPE_I82378, 136 .parent = TYPE_PCI_DEVICE, 137 .instance_size = sizeof(I82378State), 138 .instance_init = i82378_init, 139 .class_init = i82378_class_init, 140 .interfaces = (InterfaceInfo[]) { 141 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 142 { }, 143 }, 144 }; 145 146 static void i82378_register_types(void) 147 { 148 type_register_static(&i82378_type_info); 149 } 150 151 type_init(i82378_register_types) 152