1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License, version 2, as 4 * published by the Free Software Foundation. 5 * 6 * This program is distributed in the hope that it will be useful, 7 * but WITHOUT ANY WARRANTY; without even the implied warranty of 8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9 * GNU General Public License for more details. 10 * 11 * You should have received a copy of the GNU General Public License 12 * along with this program; if not, see <http://www.gnu.org/licenses/>. 13 * 14 * Copyright IBM Corp. 2008 15 * 16 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 17 */ 18 19 /* This file implements emulation of the 32-bit PCI controller found in some 20 * 4xx SoCs, such as the 440EP. */ 21 22 #include "qemu/osdep.h" 23 #include "hw/irq.h" 24 #include "hw/ppc/ppc.h" 25 #include "hw/ppc/ppc4xx.h" 26 #include "migration/vmstate.h" 27 #include "qemu/module.h" 28 #include "sysemu/reset.h" 29 #include "hw/pci/pci.h" 30 #include "hw/pci/pci_host.h" 31 #include "exec/address-spaces.h" 32 #include "trace.h" 33 34 struct PCIMasterMap { 35 uint32_t la; 36 uint32_t ma; 37 uint32_t pcila; 38 uint32_t pciha; 39 }; 40 41 struct PCITargetMap { 42 uint32_t ms; 43 uint32_t la; 44 }; 45 46 #define PPC4xx_PCI_HOST_BRIDGE(obj) \ 47 OBJECT_CHECK(PPC4xxPCIState, (obj), TYPE_PPC4xx_PCI_HOST_BRIDGE) 48 49 #define PPC4xx_PCI_NR_PMMS 3 50 #define PPC4xx_PCI_NR_PTMS 2 51 52 struct PPC4xxPCIState { 53 PCIHostState parent_obj; 54 55 struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS]; 56 struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS]; 57 qemu_irq irq[4]; 58 59 MemoryRegion container; 60 MemoryRegion iomem; 61 }; 62 typedef struct PPC4xxPCIState PPC4xxPCIState; 63 64 #define PCIC0_CFGADDR 0x0 65 #define PCIC0_CFGDATA 0x4 66 67 /* PLB Memory Map (PMM) registers specify which PLB addresses are translated to 68 * PCI accesses. */ 69 #define PCIL0_PMM0LA 0x0 70 #define PCIL0_PMM0MA 0x4 71 #define PCIL0_PMM0PCILA 0x8 72 #define PCIL0_PMM0PCIHA 0xc 73 #define PCIL0_PMM1LA 0x10 74 #define PCIL0_PMM1MA 0x14 75 #define PCIL0_PMM1PCILA 0x18 76 #define PCIL0_PMM1PCIHA 0x1c 77 #define PCIL0_PMM2LA 0x20 78 #define PCIL0_PMM2MA 0x24 79 #define PCIL0_PMM2PCILA 0x28 80 #define PCIL0_PMM2PCIHA 0x2c 81 82 /* PCI Target Map (PTM) registers specify which PCI addresses are translated to 83 * PLB accesses. */ 84 #define PCIL0_PTM1MS 0x30 85 #define PCIL0_PTM1LA 0x34 86 #define PCIL0_PTM2MS 0x38 87 #define PCIL0_PTM2LA 0x3c 88 #define PCI_REG_BASE 0x800000 89 #define PCI_REG_SIZE 0x40 90 91 #define PCI_ALL_SIZE (PCI_REG_BASE + PCI_REG_SIZE) 92 93 static void ppc4xx_pci_reg_write4(void *opaque, hwaddr offset, 94 uint64_t value, unsigned size) 95 { 96 struct PPC4xxPCIState *pci = opaque; 97 98 /* We ignore all target attempts at PCI configuration, effectively 99 * assuming a bidirectional 1:1 mapping of PLB and PCI space. */ 100 101 switch (offset) { 102 case PCIL0_PMM0LA: 103 pci->pmm[0].la = value; 104 break; 105 case PCIL0_PMM0MA: 106 pci->pmm[0].ma = value; 107 break; 108 case PCIL0_PMM0PCIHA: 109 pci->pmm[0].pciha = value; 110 break; 111 case PCIL0_PMM0PCILA: 112 pci->pmm[0].pcila = value; 113 break; 114 115 case PCIL0_PMM1LA: 116 pci->pmm[1].la = value; 117 break; 118 case PCIL0_PMM1MA: 119 pci->pmm[1].ma = value; 120 break; 121 case PCIL0_PMM1PCIHA: 122 pci->pmm[1].pciha = value; 123 break; 124 case PCIL0_PMM1PCILA: 125 pci->pmm[1].pcila = value; 126 break; 127 128 case PCIL0_PMM2LA: 129 pci->pmm[2].la = value; 130 break; 131 case PCIL0_PMM2MA: 132 pci->pmm[2].ma = value; 133 break; 134 case PCIL0_PMM2PCIHA: 135 pci->pmm[2].pciha = value; 136 break; 137 case PCIL0_PMM2PCILA: 138 pci->pmm[2].pcila = value; 139 break; 140 141 case PCIL0_PTM1MS: 142 pci->ptm[0].ms = value; 143 break; 144 case PCIL0_PTM1LA: 145 pci->ptm[0].la = value; 146 break; 147 case PCIL0_PTM2MS: 148 pci->ptm[1].ms = value; 149 break; 150 case PCIL0_PTM2LA: 151 pci->ptm[1].la = value; 152 break; 153 154 default: 155 printf("%s: unhandled PCI internal register 0x%lx\n", __func__, 156 (unsigned long)offset); 157 break; 158 } 159 } 160 161 static uint64_t ppc4xx_pci_reg_read4(void *opaque, hwaddr offset, 162 unsigned size) 163 { 164 struct PPC4xxPCIState *pci = opaque; 165 uint32_t value; 166 167 switch (offset) { 168 case PCIL0_PMM0LA: 169 value = pci->pmm[0].la; 170 break; 171 case PCIL0_PMM0MA: 172 value = pci->pmm[0].ma; 173 break; 174 case PCIL0_PMM0PCIHA: 175 value = pci->pmm[0].pciha; 176 break; 177 case PCIL0_PMM0PCILA: 178 value = pci->pmm[0].pcila; 179 break; 180 181 case PCIL0_PMM1LA: 182 value = pci->pmm[1].la; 183 break; 184 case PCIL0_PMM1MA: 185 value = pci->pmm[1].ma; 186 break; 187 case PCIL0_PMM1PCIHA: 188 value = pci->pmm[1].pciha; 189 break; 190 case PCIL0_PMM1PCILA: 191 value = pci->pmm[1].pcila; 192 break; 193 194 case PCIL0_PMM2LA: 195 value = pci->pmm[2].la; 196 break; 197 case PCIL0_PMM2MA: 198 value = pci->pmm[2].ma; 199 break; 200 case PCIL0_PMM2PCIHA: 201 value = pci->pmm[2].pciha; 202 break; 203 case PCIL0_PMM2PCILA: 204 value = pci->pmm[2].pcila; 205 break; 206 207 case PCIL0_PTM1MS: 208 value = pci->ptm[0].ms; 209 break; 210 case PCIL0_PTM1LA: 211 value = pci->ptm[0].la; 212 break; 213 case PCIL0_PTM2MS: 214 value = pci->ptm[1].ms; 215 break; 216 case PCIL0_PTM2LA: 217 value = pci->ptm[1].la; 218 break; 219 220 default: 221 printf("%s: invalid PCI internal register 0x%lx\n", __func__, 222 (unsigned long)offset); 223 value = 0; 224 } 225 226 return value; 227 } 228 229 static const MemoryRegionOps pci_reg_ops = { 230 .read = ppc4xx_pci_reg_read4, 231 .write = ppc4xx_pci_reg_write4, 232 .endianness = DEVICE_LITTLE_ENDIAN, 233 }; 234 235 static void ppc4xx_pci_reset(void *opaque) 236 { 237 struct PPC4xxPCIState *pci = opaque; 238 239 memset(pci->pmm, 0, sizeof(pci->pmm)); 240 memset(pci->ptm, 0, sizeof(pci->ptm)); 241 } 242 243 /* On Bamboo, all pins from each slot are tied to a single board IRQ. This 244 * may need further refactoring for other boards. */ 245 static int ppc4xx_pci_map_irq(PCIDevice *pci_dev, int irq_num) 246 { 247 int slot = pci_dev->devfn >> 3; 248 249 trace_ppc4xx_pci_map_irq(pci_dev->devfn, irq_num, slot); 250 251 return slot - 1; 252 } 253 254 static void ppc4xx_pci_set_irq(void *opaque, int irq_num, int level) 255 { 256 qemu_irq *pci_irqs = opaque; 257 258 trace_ppc4xx_pci_set_irq(irq_num); 259 assert(irq_num >= 0); 260 qemu_set_irq(pci_irqs[irq_num], level); 261 } 262 263 static const VMStateDescription vmstate_pci_master_map = { 264 .name = "pci_master_map", 265 .version_id = 0, 266 .minimum_version_id = 0, 267 .fields = (VMStateField[]) { 268 VMSTATE_UINT32(la, struct PCIMasterMap), 269 VMSTATE_UINT32(ma, struct PCIMasterMap), 270 VMSTATE_UINT32(pcila, struct PCIMasterMap), 271 VMSTATE_UINT32(pciha, struct PCIMasterMap), 272 VMSTATE_END_OF_LIST() 273 } 274 }; 275 276 static const VMStateDescription vmstate_pci_target_map = { 277 .name = "pci_target_map", 278 .version_id = 0, 279 .minimum_version_id = 0, 280 .fields = (VMStateField[]) { 281 VMSTATE_UINT32(ms, struct PCITargetMap), 282 VMSTATE_UINT32(la, struct PCITargetMap), 283 VMSTATE_END_OF_LIST() 284 } 285 }; 286 287 static const VMStateDescription vmstate_ppc4xx_pci = { 288 .name = "ppc4xx_pci", 289 .version_id = 1, 290 .minimum_version_id = 1, 291 .fields = (VMStateField[]) { 292 VMSTATE_STRUCT_ARRAY(pmm, PPC4xxPCIState, PPC4xx_PCI_NR_PMMS, 1, 293 vmstate_pci_master_map, 294 struct PCIMasterMap), 295 VMSTATE_STRUCT_ARRAY(ptm, PPC4xxPCIState, PPC4xx_PCI_NR_PTMS, 1, 296 vmstate_pci_target_map, 297 struct PCITargetMap), 298 VMSTATE_END_OF_LIST() 299 } 300 }; 301 302 /* XXX Interrupt acknowledge cycles not supported. */ 303 static void ppc4xx_pcihost_realize(DeviceState *dev, Error **errp) 304 { 305 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 306 PPC4xxPCIState *s; 307 PCIHostState *h; 308 PCIBus *b; 309 int i; 310 311 h = PCI_HOST_BRIDGE(dev); 312 s = PPC4xx_PCI_HOST_BRIDGE(dev); 313 314 for (i = 0; i < ARRAY_SIZE(s->irq); i++) { 315 sysbus_init_irq(sbd, &s->irq[i]); 316 } 317 318 b = pci_register_root_bus(dev, NULL, ppc4xx_pci_set_irq, 319 ppc4xx_pci_map_irq, s->irq, get_system_memory(), 320 get_system_io(), 0, ARRAY_SIZE(s->irq), 321 TYPE_PCI_BUS); 322 h->bus = b; 323 324 pci_create_simple(b, 0, "ppc4xx-host-bridge"); 325 326 /* XXX split into 2 memory regions, one for config space, one for regs */ 327 memory_region_init(&s->container, OBJECT(s), "pci-container", PCI_ALL_SIZE); 328 memory_region_init_io(&h->conf_mem, OBJECT(s), &pci_host_conf_le_ops, h, 329 "pci-conf-idx", 4); 330 memory_region_init_io(&h->data_mem, OBJECT(s), &pci_host_data_le_ops, h, 331 "pci-conf-data", 4); 332 memory_region_init_io(&s->iomem, OBJECT(s), &pci_reg_ops, s, 333 "pci.reg", PCI_REG_SIZE); 334 memory_region_add_subregion(&s->container, PCIC0_CFGADDR, &h->conf_mem); 335 memory_region_add_subregion(&s->container, PCIC0_CFGDATA, &h->data_mem); 336 memory_region_add_subregion(&s->container, PCI_REG_BASE, &s->iomem); 337 sysbus_init_mmio(sbd, &s->container); 338 qemu_register_reset(ppc4xx_pci_reset, s); 339 } 340 341 static void ppc4xx_host_bridge_class_init(ObjectClass *klass, void *data) 342 { 343 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 344 DeviceClass *dc = DEVICE_CLASS(klass); 345 346 dc->desc = "Host bridge"; 347 k->vendor_id = PCI_VENDOR_ID_IBM; 348 k->device_id = PCI_DEVICE_ID_IBM_440GX; 349 k->class_id = PCI_CLASS_BRIDGE_OTHER; 350 /* 351 * PCI-facing part of the host bridge, not usable without the 352 * host-facing part, which can't be device_add'ed, yet. 353 */ 354 dc->user_creatable = false; 355 } 356 357 static const TypeInfo ppc4xx_host_bridge_info = { 358 .name = "ppc4xx-host-bridge", 359 .parent = TYPE_PCI_DEVICE, 360 .instance_size = sizeof(PCIDevice), 361 .class_init = ppc4xx_host_bridge_class_init, 362 .interfaces = (InterfaceInfo[]) { 363 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 364 { }, 365 }, 366 }; 367 368 static void ppc4xx_pcihost_class_init(ObjectClass *klass, void *data) 369 { 370 DeviceClass *dc = DEVICE_CLASS(klass); 371 372 dc->realize = ppc4xx_pcihost_realize; 373 dc->vmsd = &vmstate_ppc4xx_pci; 374 } 375 376 static const TypeInfo ppc4xx_pcihost_info = { 377 .name = TYPE_PPC4xx_PCI_HOST_BRIDGE, 378 .parent = TYPE_PCI_HOST_BRIDGE, 379 .instance_size = sizeof(PPC4xxPCIState), 380 .class_init = ppc4xx_pcihost_class_init, 381 }; 382 383 static void ppc4xx_pci_register_types(void) 384 { 385 type_register_static(&ppc4xx_pcihost_info); 386 type_register_static(&ppc4xx_host_bridge_info); 387 } 388 389 type_init(ppc4xx_pci_register_types) 390