1 /* 2 * QEMU IDE Emulation: PCI PIIX3/4 support. 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * Copyright (c) 2006 Openedhand Ltd. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 * 25 * References: 26 * [1] 82371FB (PIIX) AND 82371SB (PIIX3) PCI ISA IDE XCELERATOR, 27 * 290550-002, Intel Corporation, April 1997. 28 */ 29 30 #include "qemu/osdep.h" 31 #include "qapi/error.h" 32 #include "hw/pci/pci.h" 33 #include "hw/ide/piix.h" 34 #include "hw/ide/pci.h" 35 #include "trace.h" 36 37 static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size) 38 { 39 BMDMAState *bm = opaque; 40 uint32_t val; 41 42 if (size != 1) { 43 return ((uint64_t)1 << (size * 8)) - 1; 44 } 45 46 switch(addr & 3) { 47 case 0: 48 val = bm->cmd; 49 break; 50 case 2: 51 val = bm->status; 52 break; 53 default: 54 val = 0xff; 55 break; 56 } 57 58 trace_bmdma_read(addr, val); 59 return val; 60 } 61 62 static void bmdma_write(void *opaque, hwaddr addr, 63 uint64_t val, unsigned size) 64 { 65 BMDMAState *bm = opaque; 66 67 if (size != 1) { 68 return; 69 } 70 71 trace_bmdma_write(addr, val); 72 73 switch(addr & 3) { 74 case 0: 75 bmdma_cmd_writeb(bm, val); 76 break; 77 case 2: 78 bmdma_status_writeb(bm, val); 79 break; 80 } 81 } 82 83 static const MemoryRegionOps piix_bmdma_ops = { 84 .read = bmdma_read, 85 .write = bmdma_write, 86 }; 87 88 static void bmdma_setup_bar(PCIIDEState *d) 89 { 90 int i; 91 92 memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16); 93 for(i = 0;i < 2; i++) { 94 BMDMAState *bm = &d->bmdma[i]; 95 96 memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm, 97 "piix-bmdma", 4); 98 memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io); 99 memory_region_init_io(&bm->addr_ioport, OBJECT(d), 100 &bmdma_addr_ioport_ops, bm, "bmdma", 4); 101 memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport); 102 } 103 } 104 105 static void piix_ide_reset(DeviceState *dev) 106 { 107 PCIIDEState *d = PCI_IDE(dev); 108 PCIDevice *pd = PCI_DEVICE(d); 109 uint8_t *pci_conf = pd->config; 110 int i; 111 112 for (i = 0; i < 2; i++) { 113 ide_bus_reset(&d->bus[i]); 114 } 115 116 /* PCI command register default value (0000h) per [1, p.48]. */ 117 pci_set_word(pci_conf + PCI_COMMAND, 0x0000); 118 pci_set_word(pci_conf + PCI_STATUS, 119 PCI_STATUS_DEVSEL_MEDIUM | PCI_STATUS_FAST_BACK); 120 pci_set_long(pci_conf + 0x20, 0x1); /* BMIBA: 20-23h */ 121 } 122 123 static bool pci_piix_init_bus(PCIIDEState *d, unsigned i, Error **errp) 124 { 125 static const struct { 126 int iobase; 127 int iobase2; 128 int isairq; 129 } port_info[] = { 130 {0x1f0, 0x3f6, 14}, 131 {0x170, 0x376, 15}, 132 }; 133 int ret; 134 135 ide_bus_init(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2); 136 ret = ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase, 137 port_info[i].iobase2); 138 if (ret) { 139 error_setg_errno(errp, -ret, "Failed to realize %s port %u", 140 object_get_typename(OBJECT(d)), i); 141 return false; 142 } 143 ide_bus_init_output_irq(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq)); 144 145 bmdma_init(&d->bus[i], &d->bmdma[i], d); 146 ide_bus_register_restart_cb(&d->bus[i]); 147 148 return true; 149 } 150 151 static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) 152 { 153 PCIIDEState *d = PCI_IDE(dev); 154 uint8_t *pci_conf = dev->config; 155 156 pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode 157 158 bmdma_setup_bar(d); 159 pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar); 160 161 for (unsigned i = 0; i < 2; i++) { 162 if (!pci_piix_init_bus(d, i, errp)) { 163 return; 164 } 165 } 166 } 167 168 static void pci_piix_ide_exitfn(PCIDevice *dev) 169 { 170 PCIIDEState *d = PCI_IDE(dev); 171 unsigned i; 172 173 for (i = 0; i < 2; ++i) { 174 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io); 175 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport); 176 } 177 } 178 179 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */ 180 static void piix3_ide_class_init(ObjectClass *klass, void *data) 181 { 182 DeviceClass *dc = DEVICE_CLASS(klass); 183 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 184 185 dc->reset = piix_ide_reset; 186 dc->vmsd = &vmstate_ide_pci; 187 k->realize = pci_piix_ide_realize; 188 k->exit = pci_piix_ide_exitfn; 189 k->vendor_id = PCI_VENDOR_ID_INTEL; 190 k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1; 191 k->class_id = PCI_CLASS_STORAGE_IDE; 192 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 193 dc->hotpluggable = false; 194 } 195 196 static const TypeInfo piix3_ide_info = { 197 .name = TYPE_PIIX3_IDE, 198 .parent = TYPE_PCI_IDE, 199 .class_init = piix3_ide_class_init, 200 }; 201 202 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */ 203 static void piix4_ide_class_init(ObjectClass *klass, void *data) 204 { 205 DeviceClass *dc = DEVICE_CLASS(klass); 206 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 207 208 dc->reset = piix_ide_reset; 209 dc->vmsd = &vmstate_ide_pci; 210 k->realize = pci_piix_ide_realize; 211 k->exit = pci_piix_ide_exitfn; 212 k->vendor_id = PCI_VENDOR_ID_INTEL; 213 k->device_id = PCI_DEVICE_ID_INTEL_82371AB; 214 k->class_id = PCI_CLASS_STORAGE_IDE; 215 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 216 dc->hotpluggable = false; 217 } 218 219 static const TypeInfo piix4_ide_info = { 220 .name = TYPE_PIIX4_IDE, 221 .parent = TYPE_PCI_IDE, 222 .class_init = piix4_ide_class_init, 223 }; 224 225 static void piix_ide_register_types(void) 226 { 227 type_register_static(&piix3_ide_info); 228 type_register_static(&piix4_ide_info); 229 } 230 231 type_init(piix_ide_register_types) 232