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 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 "hw/pci/pci.h" 21 #include "hw/i386/pc.h" 22 #include "hw/timer/i8254.h" 23 #include "hw/audio/pcspk.h" 24 25 #define TYPE_I82378 "i82378" 26 #define I82378(obj) \ 27 OBJECT_CHECK(I82378State, (obj), TYPE_I82378) 28 29 typedef struct I82378State { 30 PCIDevice parent_obj; 31 32 qemu_irq out[2]; 33 qemu_irq *i8259; 34 MemoryRegion io; 35 } I82378State; 36 37 static const VMStateDescription vmstate_i82378 = { 38 .name = "pci-i82378", 39 .version_id = 0, 40 .minimum_version_id = 0, 41 .fields = (VMStateField[]) { 42 VMSTATE_PCI_DEVICE(parent_obj, I82378State), 43 VMSTATE_END_OF_LIST() 44 }, 45 }; 46 47 static void i82378_request_out0_irq(void *opaque, int irq, int level) 48 { 49 I82378State *s = opaque; 50 qemu_set_irq(s->out[0], level); 51 } 52 53 static void i82378_request_pic_irq(void *opaque, int irq, int level) 54 { 55 DeviceState *dev = opaque; 56 I82378State *s = I82378(dev); 57 58 qemu_set_irq(s->i8259[irq], level); 59 } 60 61 static void i82378_realize(PCIDevice *pci, Error **errp) 62 { 63 DeviceState *dev = DEVICE(pci); 64 I82378State *s = I82378(dev); 65 uint8_t *pci_conf; 66 ISABus *isabus; 67 ISADevice *isa; 68 qemu_irq *out0_irq; 69 70 pci_conf = pci->config; 71 pci_set_word(pci_conf + PCI_COMMAND, 72 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 73 pci_set_word(pci_conf + PCI_STATUS, 74 PCI_STATUS_DEVSEL_MEDIUM); 75 76 pci_config_set_interrupt_pin(pci_conf, 1); /* interrupt pin 0 */ 77 78 isabus = isa_bus_new(dev, get_system_memory(), 79 pci_address_space_io(pci)); 80 81 /* This device has: 82 2 82C59 (irq) 83 1 82C54 (pit) 84 2 82C37 (dma) 85 NMI 86 Utility Bus Support Registers 87 88 All devices accept byte access only, except timer 89 */ 90 91 /* Workaround the fact that i8259 is not qdev'ified... */ 92 out0_irq = qemu_allocate_irqs(i82378_request_out0_irq, s, 1); 93 94 /* 2 82C59 (irq) */ 95 s->i8259 = i8259_init(isabus, *out0_irq); 96 isa_bus_irqs(isabus, s->i8259); 97 98 /* 1 82C54 (pit) */ 99 isa = pit_init(isabus, 0x40, 0, NULL); 100 101 /* speaker */ 102 pcspk_init(isabus, isa); 103 104 /* 2 82C37 (dma) */ 105 isa = isa_create_simple(isabus, "i82374"); 106 qdev_connect_gpio_out(DEVICE(isa), 0, s->out[1]); 107 108 /* timer */ 109 isa_create_simple(isabus, "mc146818rtc"); 110 } 111 112 static void i82378_init(Object *obj) 113 { 114 DeviceState *dev = DEVICE(obj); 115 I82378State *s = I82378(obj); 116 117 qdev_init_gpio_out(dev, s->out, 2); 118 qdev_init_gpio_in(dev, i82378_request_pic_irq, 16); 119 } 120 121 static void i82378_class_init(ObjectClass *klass, void *data) 122 { 123 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 124 DeviceClass *dc = DEVICE_CLASS(klass); 125 126 k->realize = i82378_realize; 127 k->vendor_id = PCI_VENDOR_ID_INTEL; 128 k->device_id = PCI_DEVICE_ID_INTEL_82378; 129 k->revision = 0x03; 130 k->class_id = PCI_CLASS_BRIDGE_ISA; 131 dc->vmsd = &vmstate_i82378; 132 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 133 } 134 135 static const TypeInfo i82378_type_info = { 136 .name = TYPE_I82378, 137 .parent = TYPE_PCI_DEVICE, 138 .instance_size = sizeof(I82378State), 139 .instance_init = i82378_init, 140 .class_init = i82378_class_init, 141 }; 142 143 static void i82378_register_types(void) 144 { 145 type_register_static(&i82378_type_info); 146 } 147 148 type_init(i82378_register_types) 149