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 "ppce500.h"
  19 #include "pci.h"
  20 #include "pci_host.h"
  21 #include "bswap.h"
  22
  23 #ifdef DEBUG_PCI
  24 #define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
  25 #else
  26 #define pci_debug(fmt, ...)
  27 #endif
  28
  29 #define PCIE500_CFGADDR       0x0
  30 #define PCIE500_CFGDATA       0x4
  31 #define PCIE500_REG_BASE      0xC00
  32 #define PCIE500_REG_SIZE      (0x1000 - 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     struct pci_outbound pob[PPCE500_PCI_NR_POBS];
  77     struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
  78     uint32_t gasket_time;
  79     PCIHostState pci_state;
  80     PCIDevice *pci_dev;
  81 };
  82
  83 typedef struct PPCE500PCIState PPCE500PCIState;
  84
  85 static uint32_t pci_reg_read4(void *opaque, target_phys_addr_t addr)
  86 {
  87     PPCE500PCIState *pci = opaque;
  88     unsigned long win;
  89     uint32_t value = 0;
  90
  91     win = addr & 0xfe0;
  92
  93     switch (win) {
  94     case PPCE500_PCI_OW1:
  95     case PPCE500_PCI_OW2:
  96     case PPCE500_PCI_OW3:
  97     case PPCE500_PCI_OW4:
  98         switch (addr & 0xC) {
  99         case PCI_POTAR: value = pci->pob[(addr >> 5) & 0x7].potar; break;
 100         case PCI_POTEAR: value = pci->pob[(addr >> 5) & 0x7].potear; break;
 101         case PCI_POWBAR: value = pci->pob[(addr >> 5) & 0x7].powbar; break;
 102         case PCI_POWAR: value = pci->pob[(addr >> 5) & 0x7].powar; break;
 103         default: break;
 104         }
 105         break;
 106
 107     case PPCE500_PCI_IW3:
 108     case PPCE500_PCI_IW2:
 109     case PPCE500_PCI_IW1:
 110         switch (addr & 0xC) {
 111         case PCI_PITAR: value = pci->pib[(addr >> 5) & 0x3].pitar; break;
 112         case PCI_PIWBAR: value = pci->pib[(addr >> 5) & 0x3].piwbar; break;
 113         case PCI_PIWBEAR: value = pci->pib[(addr >> 5) & 0x3].piwbear; break;
 114         case PCI_PIWAR: value = pci->pib[(addr >> 5) & 0x3].piwar; break;
 115         default: break;
 116         };
 117         break;
 118
 119     case PPCE500_PCI_GASKET_TIMR:
 120         value = pci->gasket_time;
 121         break;
 122
 123     default:
 124         break;
 125     }
 126
 127     pci_debug("%s: win:%lx(addr:" TARGET_FMT_plx ") -> value:%x\n", __func__,
 128               win, addr, value);
 129     return value;
 130 }
 131
 132 static CPUReadMemoryFunc * const e500_pci_reg_read[] = {
 133     &pci_reg_read4,
 134     &pci_reg_read4,
 135     &pci_reg_read4,
 136 };
 137
 138 static void pci_reg_write4(void *opaque, target_phys_addr_t addr,
 139                                uint32_t value)
 140 {
 141     PPCE500PCIState *pci = opaque;
 142     unsigned long win;
 143
 144     win = addr & 0xfe0;
 145
 146     pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n",
 147               __func__, value, win, addr);
 148
 149     switch (win) {
 150     case PPCE500_PCI_OW1:
 151     case PPCE500_PCI_OW2:
 152     case PPCE500_PCI_OW3:
 153     case PPCE500_PCI_OW4:
 154         switch (addr & 0xC) {
 155         case PCI_POTAR: pci->pob[(addr >> 5) & 0x7].potar = value; break;
 156         case PCI_POTEAR: pci->pob[(addr >> 5) & 0x7].potear = value; break;
 157         case PCI_POWBAR: pci->pob[(addr >> 5) & 0x7].powbar = value; break;
 158         case PCI_POWAR: pci->pob[(addr >> 5) & 0x7].powar = value; break;
 159         default: break;
 160         };
 161         break;
 162
 163     case PPCE500_PCI_IW3:
 164     case PPCE500_PCI_IW2:
 165     case PPCE500_PCI_IW1:
 166         switch (addr & 0xC) {
 167         case PCI_PITAR: pci->pib[(addr >> 5) & 0x3].pitar = value; break;
 168         case PCI_PIWBAR: pci->pib[(addr >> 5) & 0x3].piwbar = value; break;
 169         case PCI_PIWBEAR: pci->pib[(addr >> 5) & 0x3].piwbear = value; break;
 170         case PCI_PIWAR: pci->pib[(addr >> 5) & 0x3].piwar = value; break;
 171         default: break;
 172         };
 173         break;
 174
 175     case PPCE500_PCI_GASKET_TIMR:
 176         pci->gasket_time = value;
 177         break;
 178
 179     default:
 180         break;
 181     };
 182 }
 183
 184 static CPUWriteMemoryFunc * const e500_pci_reg_write[] = {
 185     &pci_reg_write4,
 186     &pci_reg_write4,
 187     &pci_reg_write4,
 188 };
 189
 190 static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 191 {
 192     int devno = pci_dev->devfn >> 3, ret = 0;
 193
 194     switch (devno) {
 195         /* Two PCI slot */
 196         case 0x11:
 197         case 0x12:
 198             ret = (irq_num + devno - 0x10) % 4;
 199             break;
 200         default:
 201             printf("Error:%s:unknown dev number\n", __func__);
 202     }
 203
 204     pci_debug("%s: devfn %x irq %d -> %d  devno:%x\n", __func__,
 205            pci_dev->devfn, irq_num, ret, devno);
 206
 207     return ret;
 208 }
 209
 210 static void mpc85xx_pci_set_irq(void *opaque, int irq_num, int level)
 211 {
 212     qemu_irq *pic = opaque;
 213
 214     pci_debug("%s: PCI irq %d, level:%d\n", __func__, irq_num, level);
 215
 216     qemu_set_irq(pic[irq_num], level);
 217 }
 218
 219 static void ppce500_pci_save(QEMUFile *f, void *opaque)
 220 {
 221     PPCE500PCIState *controller = opaque;
 222     int i;
 223
 224     pci_device_save(controller->pci_dev, f);
 225
 226     for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
 227         qemu_put_be32s(f, &controller->pob[i].potar);
 228         qemu_put_be32s(f, &controller->pob[i].potear);
 229         qemu_put_be32s(f, &controller->pob[i].powbar);
 230         qemu_put_be32s(f, &controller->pob[i].powar);
 231     }
 232
 233     for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
 234         qemu_put_be32s(f, &controller->pib[i].pitar);
 235         qemu_put_be32s(f, &controller->pib[i].piwbar);
 236         qemu_put_be32s(f, &controller->pib[i].piwbear);
 237         qemu_put_be32s(f, &controller->pib[i].piwar);
 238     }
 239     qemu_put_be32s(f, &controller->gasket_time);
 240 }
 241
 242 static int ppce500_pci_load(QEMUFile *f, void *opaque, int version_id)
 243 {
 244     PPCE500PCIState *controller = opaque;
 245     int i;
 246
 247     if (version_id != 1)
 248         return -EINVAL;
 249
 250     pci_device_load(controller->pci_dev, f);
 251
 252     for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
 253         qemu_get_be32s(f, &controller->pob[i].potar);
 254         qemu_get_be32s(f, &controller->pob[i].potear);
 255         qemu_get_be32s(f, &controller->pob[i].powbar);
 256         qemu_get_be32s(f, &controller->pob[i].powar);
 257     }
 258
 259     for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
 260         qemu_get_be32s(f, &controller->pib[i].pitar);
 261         qemu_get_be32s(f, &controller->pib[i].piwbar);
 262         qemu_get_be32s(f, &controller->pib[i].piwbear);
 263         qemu_get_be32s(f, &controller->pib[i].piwar);
 264     }
 265     qemu_get_be32s(f, &controller->gasket_time);
 266
 267     return 0;
 268 }
 269
 270 PCIBus *ppce500_pci_init(qemu_irq pci_irqs[4], target_phys_addr_t registers)
 271 {
 272     PPCE500PCIState *controller;
 273     PCIDevice *d;
 274     int index;
 275     static int ppce500_pci_id;
 276
 277     controller = qemu_mallocz(sizeof(PPCE500PCIState));
 278
 279     controller->pci_state.bus = pci_register_bus(NULL, "pci",
 280                                                  mpc85xx_pci_set_irq,
 281                                                  mpc85xx_pci_map_irq,
 282                                                  pci_irqs, PCI_DEVFN(0x11, 0),
 283                                                  4);
 284     d = pci_register_device(controller->pci_state.bus,
 285                             "host bridge", sizeof(PCIDevice),
 286                             0, NULL, NULL);
 287
 288     pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_FREESCALE);
 289     pci_config_set_device_id(d->config, PCI_DEVICE_ID_MPC8533E);
 290     pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_POWERPC);
 291
 292     controller->pci_dev = d;
 293
 294     /* CFGADDR */
 295     index = pci_host_conf_register_mmio(&controller->pci_state,
 296                                         DEVICE_BIG_ENDIAN);
 297     if (index < 0)
 298         goto free;
 299     cpu_register_physical_memory(registers + PCIE500_CFGADDR, 4, index);
 300
 301     /* CFGDATA */
 302     index = pci_host_data_register_mmio(&controller->pci_state,
 303                                         DEVICE_BIG_ENDIAN);
 304     if (index < 0)
 305         goto free;
 306     cpu_register_physical_memory(registers + PCIE500_CFGDATA, 4, index);
 307
 308     index = cpu_register_io_memory(e500_pci_reg_read,
 309                                    e500_pci_reg_write, controller,
 310                                    DEVICE_NATIVE_ENDIAN);
 311     if (index < 0)
 312         goto free;
 313     cpu_register_physical_memory(registers + PCIE500_REG_BASE,
 314                                    PCIE500_REG_SIZE, index);
 315
 316     /* XXX load/save code not tested. */
 317     register_savevm(&d->qdev, "ppce500_pci", ppce500_pci_id++,
 318                     1, ppce500_pci_save, ppce500_pci_load, controller);
 319
 320     return controller->pci_state.bus;
 321
 322 free:
 323     printf("%s error\n", __func__);
 324     qemu_free(controller);
 325     return NULL;
 326 }