hw/ppce500_pci.c

   1 /*
   2  * QEMU PowerPC E500 embedded processors pci controller emulation
   3  *
   4  * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.
   5  *
   6  * Author: Yu Liu,     <yu.liu@freescale.com>
   7  *
   8  * This file is derived from hw/ppc4xx_pci.c,
   9  * the copyright for that material belongs to the original owners.
  10  *
  11  * This is free software; you can redistribute it and/or modify
  12  * it under the terms of  the GNU General  Public License as published by
  13  * the Free Software Foundation;  either version 2 of the  License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #include "hw.h"
  18 #include "pci.h"
  19 #include "pci_host.h"
  20 #include "bswap.h"
  21
  22 #ifdef DEBUG_PCI
  23 #define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
  24 #else
  25 #define pci_debug(fmt, ...)
  26 #endif
  27
  28 #define PCIE500_CFGADDR       0x0
  29 #define PCIE500_CFGDATA       0x4
  30 #define PCIE500_REG_BASE      0xC00
  31 #define PCIE500_ALL_SIZE      0x1000
  32 #define PCIE500_REG_SIZE      (PCIE500_ALL_SIZE - PCIE500_REG_BASE)
  33
  34 #define PPCE500_PCI_CONFIG_ADDR         0x0
  35 #define PPCE500_PCI_CONFIG_DATA         0x4
  36 #define PPCE500_PCI_INTACK              0x8
  37
  38 #define PPCE500_PCI_OW1                 (0xC20 - PCIE500_REG_BASE)
  39 #define PPCE500_PCI_OW2                 (0xC40 - PCIE500_REG_BASE)
  40 #define PPCE500_PCI_OW3                 (0xC60 - PCIE500_REG_BASE)
  41 #define PPCE500_PCI_OW4                 (0xC80 - PCIE500_REG_BASE)
  42 #define PPCE500_PCI_IW3                 (0xDA0 - PCIE500_REG_BASE)
  43 #define PPCE500_PCI_IW2                 (0xDC0 - PCIE500_REG_BASE)
  44 #define PPCE500_PCI_IW1                 (0xDE0 - PCIE500_REG_BASE)
  45
  46 #define PPCE500_PCI_GASKET_TIMR         (0xE20 - PCIE500_REG_BASE)
  47
  48 #define PCI_POTAR               0x0
  49 #define PCI_POTEAR              0x4
  50 #define PCI_POWBAR              0x8
  51 #define PCI_POWAR               0x10
  52
  53 #define PCI_PITAR               0x0
  54 #define PCI_PIWBAR              0x8
  55 #define PCI_PIWBEAR             0xC
  56 #define PCI_PIWAR               0x10
  57
  58 #define PPCE500_PCI_NR_POBS     5
  59 #define PPCE500_PCI_NR_PIBS     3
  60
  61 struct  pci_outbound {
  62     uint32_t potar;
  63     uint32_t potear;
  64     uint32_t powbar;
  65     uint32_t powar;
  66 };
  67
  68 struct pci_inbound {
  69     uint32_t pitar;
  70     uint32_t piwbar;
  71     uint32_t piwbear;
  72     uint32_t piwar;
  73 };
  74
  75 struct PPCE500PCIState {
  76     PCIHostState pci_state;
  77     struct pci_outbound pob[PPCE500_PCI_NR_POBS];
  78     struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
  79     uint32_t gasket_time;
  80     qemu_irq irq[4];
  81     /* mmio maps */
  82     int cfgaddr;
  83     int cfgdata;
  84     int reg;
  85 };
  86
  87 typedef struct PPCE500PCIState PPCE500PCIState;
  88
  89 static uint32_t pci_reg_read4(void *opaque, target_phys_addr_t addr)
  90 {
  91     PPCE500PCIState *pci = opaque;
  92     unsigned long win;
  93     uint32_t value = 0;
  94
  95     win = addr & 0xfe0;
  96
  97     switch (win) {
  98     case PPCE500_PCI_OW1:
  99     case PPCE500_PCI_OW2:
 100     case PPCE500_PCI_OW3:
 101     case PPCE500_PCI_OW4:
 102         switch (addr & 0xC) {
 103         case PCI_POTAR: value = pci->pob[(addr >> 5) & 0x7].potar; break;
 104         case PCI_POTEAR: value = pci->pob[(addr >> 5) & 0x7].potear; break;
 105         case PCI_POWBAR: value = pci->pob[(addr >> 5) & 0x7].powbar; break;
 106         case PCI_POWAR: value = pci->pob[(addr >> 5) & 0x7].powar; break;
 107         default: break;
 108         }
 109         break;
 110
 111     case PPCE500_PCI_IW3:
 112     case PPCE500_PCI_IW2:
 113     case PPCE500_PCI_IW1:
 114         switch (addr & 0xC) {
 115         case PCI_PITAR: value = pci->pib[(addr >> 5) & 0x3].pitar; break;
 116         case PCI_PIWBAR: value = pci->pib[(addr >> 5) & 0x3].piwbar; break;
 117         case PCI_PIWBEAR: value = pci->pib[(addr >> 5) & 0x3].piwbear; break;
 118         case PCI_PIWAR: value = pci->pib[(addr >> 5) & 0x3].piwar; break;
 119         default: break;
 120         };
 121         break;
 122
 123     case PPCE500_PCI_GASKET_TIMR:
 124         value = pci->gasket_time;
 125         break;
 126
 127     default:
 128         break;
 129     }
 130
 131     pci_debug("%s: win:%lx(addr:" TARGET_FMT_plx ") -> value:%x\n", __func__,
 132               win, addr, value);
 133     return value;
 134 }
 135
 136 static CPUReadMemoryFunc * const e500_pci_reg_read[] = {
 137     &pci_reg_read4,
 138     &pci_reg_read4,
 139     &pci_reg_read4,
 140 };
 141
 142 static void pci_reg_write4(void *opaque, target_phys_addr_t addr,
 143                                uint32_t value)
 144 {
 145     PPCE500PCIState *pci = opaque;
 146     unsigned long win;
 147
 148     win = addr & 0xfe0;
 149
 150     pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n",
 151               __func__, value, win, addr);
 152
 153     switch (win) {
 154     case PPCE500_PCI_OW1:
 155     case PPCE500_PCI_OW2:
 156     case PPCE500_PCI_OW3:
 157     case PPCE500_PCI_OW4:
 158         switch (addr & 0xC) {
 159         case PCI_POTAR: pci->pob[(addr >> 5) & 0x7].potar = value; break;
 160         case PCI_POTEAR: pci->pob[(addr >> 5) & 0x7].potear = value; break;
 161         case PCI_POWBAR: pci->pob[(addr >> 5) & 0x7].powbar = value; break;
 162         case PCI_POWAR: pci->pob[(addr >> 5) & 0x7].powar = value; break;
 163         default: break;
 164         };
 165         break;
 166
 167     case PPCE500_PCI_IW3:
 168     case PPCE500_PCI_IW2:
 169     case PPCE500_PCI_IW1:
 170         switch (addr & 0xC) {
 171         case PCI_PITAR: pci->pib[(addr >> 5) & 0x3].pitar = value; break;
 172         case PCI_PIWBAR: pci->pib[(addr >> 5) & 0x3].piwbar = value; break;
 173         case PCI_PIWBEAR: pci->pib[(addr >> 5) & 0x3].piwbear = value; break;
 174         case PCI_PIWAR: pci->pib[(addr >> 5) & 0x3].piwar = value; break;
 175         default: break;
 176         };
 177         break;
 178
 179     case PPCE500_PCI_GASKET_TIMR:
 180         pci->gasket_time = value;
 181         break;
 182
 183     default:
 184         break;
 185     };
 186 }
 187
 188 static CPUWriteMemoryFunc * const e500_pci_reg_write[] = {
 189     &pci_reg_write4,
 190     &pci_reg_write4,
 191     &pci_reg_write4,
 192 };
 193
 194 static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 195 {
 196     int devno = pci_dev->devfn >> 3, ret = 0;
 197
 198     switch (devno) {
 199         /* Two PCI slot */
 200         case 0x11:
 201         case 0x12:
 202             ret = (irq_num + devno - 0x10) % 4;
 203             break;
 204         default:
 205             printf("Error:%s:unknown dev number\n", __func__);
 206     }
 207
 208     pci_debug("%s: devfn %x irq %d -> %d  devno:%x\n", __func__,
 209            pci_dev->devfn, irq_num, ret, devno);
 210
 211     return ret;
 212 }
 213
 214 static void mpc85xx_pci_set_irq(void *opaque, int irq_num, int level)
 215 {
 216     qemu_irq *pic = opaque;
 217
 218     pci_debug("%s: PCI irq %d, level:%d\n", __func__, irq_num, level);
 219
 220     qemu_set_irq(pic[irq_num], level);
 221 }
 222
 223 static const VMStateDescription vmstate_pci_outbound = {
 224     .name = "pci_outbound",
 225     .version_id = 0,
 226     .minimum_version_id = 0,
 227     .minimum_version_id_old = 0,
 228     .fields      = (VMStateField[]) {
 229         VMSTATE_UINT32(potar, struct pci_outbound),
 230         VMSTATE_UINT32(potear, struct pci_outbound),
 231         VMSTATE_UINT32(powbar, struct pci_outbound),
 232         VMSTATE_UINT32(powar, struct pci_outbound),
 233         VMSTATE_END_OF_LIST()
 234     }
 235 };
 236
 237 static const VMStateDescription vmstate_pci_inbound = {
 238     .name = "pci_inbound",
 239     .version_id = 0,
 240     .minimum_version_id = 0,
 241     .minimum_version_id_old = 0,
 242     .fields      = (VMStateField[]) {
 243         VMSTATE_UINT32(pitar, struct pci_inbound),
 244         VMSTATE_UINT32(piwbar, struct pci_inbound),
 245         VMSTATE_UINT32(piwbear, struct pci_inbound),
 246         VMSTATE_UINT32(piwar, struct pci_inbound),
 247         VMSTATE_END_OF_LIST()
 248     }
 249 };
 250
 251 static const VMStateDescription vmstate_ppce500_pci = {
 252     .name = "ppce500_pci",
 253     .version_id = 1,
 254     .minimum_version_id = 1,
 255     .minimum_version_id_old = 1,
 256     .fields      = (VMStateField[]) {
 257         VMSTATE_STRUCT_ARRAY(pob, PPCE500PCIState, PPCE500_PCI_NR_POBS, 1,
 258                              vmstate_pci_outbound, struct pci_outbound),
 259         VMSTATE_STRUCT_ARRAY(pib, PPCE500PCIState, PPCE500_PCI_NR_PIBS, 1,
 260                              vmstate_pci_outbound, struct pci_inbound),
 261         VMSTATE_UINT32(gasket_time, PPCE500PCIState),
 262         VMSTATE_END_OF_LIST()
 263     }
 264 };
 265
 266 static void e500_pci_map(SysBusDevice *dev, target_phys_addr_t base)
 267 {
 268     PCIHostState *h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));
 269     PPCE500PCIState *s = DO_UPCAST(PPCE500PCIState, pci_state, h);
 270
 271     cpu_register_physical_memory(base + PCIE500_CFGADDR, 4, s->cfgaddr);
 272     cpu_register_physical_memory(base + PCIE500_CFGDATA, 4, s->cfgdata);
 273     cpu_register_physical_memory(base + PCIE500_REG_BASE, PCIE500_REG_SIZE,
 274                                  s->reg);
 275 }
 276
 277 #include "exec-memory.h"
 278
 279 static int e500_pcihost_initfn(SysBusDevice *dev)
 280 {
 281     PCIHostState *h;
 282     PPCE500PCIState *s;
 283     PCIBus *b;
 284     int i;
 285     MemoryRegion *address_space_mem = get_system_memory();
 286     MemoryRegion *address_space_io = get_system_io();
 287
 288     h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));
 289     s = DO_UPCAST(PPCE500PCIState, pci_state, h);
 290
 291     for (i = 0; i < ARRAY_SIZE(s->irq); i++) {
 292         sysbus_init_irq(dev, &s->irq[i]);
 293     }
 294
 295     b = pci_register_bus(&s->pci_state.busdev.qdev, NULL, mpc85xx_pci_set_irq,
 296                          mpc85xx_pci_map_irq, s->irq, address_space_mem,
 297                          address_space_io, PCI_DEVFN(0x11, 0), 4);
 298     s->pci_state.bus = b;
 299
 300     pci_create_simple(b, 0, "e500-host-bridge");
 301
 302     s->cfgaddr = pci_host_conf_register_mmio(&s->pci_state, DEVICE_BIG_ENDIAN);
 303     s->cfgdata = pci_host_data_register_mmio(&s->pci_state,
 304                                              DEVICE_LITTLE_ENDIAN);
 305     s->reg = cpu_register_io_memory(e500_pci_reg_read, e500_pci_reg_write, s,
 306                                     DEVICE_BIG_ENDIAN);
 307     sysbus_init_mmio_cb(dev, PCIE500_ALL_SIZE, e500_pci_map);
 308
 309     return 0;
 310 }
 311
 312 static PCIDeviceInfo e500_host_bridge_info = {
 313     .qdev.name    = "e500-host-bridge",
 314     .qdev.desc    = "Host bridge",
 315     .qdev.size    = sizeof(PCIDevice),
 316     .vendor_id    = PCI_VENDOR_ID_FREESCALE,
 317     .device_id    = PCI_DEVICE_ID_MPC8533E,
 318     .class_id     = PCI_CLASS_PROCESSOR_POWERPC,
 319 };
 320
 321 static SysBusDeviceInfo e500_pcihost_info = {
 322     .init         = e500_pcihost_initfn,
 323     .qdev.name    = "e500-pcihost",
 324     .qdev.size    = sizeof(PPCE500PCIState),
 325     .qdev.vmsd    = &vmstate_ppce500_pci,
 326 };
 327
 328 static void e500_pci_register(void)
 329 {
 330     sysbus_register_withprop(&e500_pcihost_info);
 331     pci_qdev_register(&e500_host_bridge_info);
 332 }
 333 device_init(e500_pci_register);