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 "ppc.h"
  19 #include "ppce500.h"
  20 typedef target_phys_addr_t pci_addr_t;
  21 #include "pci.h"
  22 #include "pci_host.h"
  23 #include "bswap.h"
  24 #include "qemu-log.h"
  25
  26 #ifdef DEBUG_PCI
  27 #define pci_debug(fmt, arg...) fprintf(stderr, fmt, ##arg)
  28 #else
  29 #define pci_debug(fmt, arg...)
  30 #endif
  31
  32 #define PCIE500_CFGADDR       0x0
  33 #define PCIE500_CFGDATA       0x4
  34 #define PCIE500_REG_BASE      0xC00
  35 #define PCIE500_REG_SIZE      (0x1000 - PCIE500_REG_BASE)
  36
  37 #define PPCE500_PCI_CONFIG_ADDR         0x0
  38 #define PPCE500_PCI_CONFIG_DATA         0x4
  39 #define PPCE500_PCI_INTACK              0x8
  40
  41 #define PPCE500_PCI_OW1                 (0xC20 - PCIE500_REG_BASE)
  42 #define PPCE500_PCI_OW2                 (0xC40 - PCIE500_REG_BASE)
  43 #define PPCE500_PCI_OW3                 (0xC60 - PCIE500_REG_BASE)
  44 #define PPCE500_PCI_OW4                 (0xC80 - PCIE500_REG_BASE)
  45 #define PPCE500_PCI_IW3                 (0xDA0 - PCIE500_REG_BASE)
  46 #define PPCE500_PCI_IW2                 (0xDC0 - PCIE500_REG_BASE)
  47 #define PPCE500_PCI_IW1                 (0xDE0 - PCIE500_REG_BASE)
  48
  49 #define PPCE500_PCI_GASKET_TIMR         (0xE20 - PCIE500_REG_BASE)
  50
  51 #define PCI_POTAR               0x0
  52 #define PCI_POTEAR              0x4
  53 #define PCI_POWBAR              0x8
  54 #define PCI_POWAR               0x10
  55
  56 #define PCI_PITAR               0x0
  57 #define PCI_PIWBAR              0x8
  58 #define PCI_PIWBEAR             0xC
  59 #define PCI_PIWAR               0x10
  60
  61 #define PPCE500_PCI_NR_POBS     5
  62 #define PPCE500_PCI_NR_PIBS     3
  63
  64 struct  pci_outbound {
  65     uint32_t potar;
  66     uint32_t potear;
  67     uint32_t powbar;
  68     uint32_t powar;
  69 };
  70
  71 struct pci_inbound {
  72     uint32_t pitar;
  73     uint32_t piwbar;
  74     uint32_t piwbear;
  75     uint32_t piwar;
  76 };
  77
  78 struct PPCE500PCIState {
  79     struct pci_outbound pob[PPCE500_PCI_NR_POBS];
  80     struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
  81     uint32_t gasket_time;
  82     PCIHostState pci_state;
  83     PCIDevice *pci_dev;
  84 };
  85
  86 typedef struct PPCE500PCIState PPCE500PCIState;
  87
  88 static uint32_t pcie500_cfgaddr_readl(void *opaque, target_phys_addr_t addr)
  89 {
  90     PPCE500PCIState *pci = opaque;
  91
  92     pci_debug("%s: (addr:%Lx) -> value:%x\n", __func__, addr,
  93                     pci->pci_state.config_reg);
  94     return pci->pci_state.config_reg;
  95 }
  96
  97 static CPUReadMemoryFunc *pcie500_cfgaddr_read[] = {
  98     &pcie500_cfgaddr_readl,
  99     &pcie500_cfgaddr_readl,
 100     &pcie500_cfgaddr_readl,
 101 };
 102
 103 static void pcie500_cfgaddr_writel(void *opaque, target_phys_addr_t addr,
 104                                   uint32_t value)
 105 {
 106     PPCE500PCIState *controller = opaque;
 107
 108     pci_debug("%s: value:%x -> (addr%Lx)\n", __func__, value, addr);
 109     controller->pci_state.config_reg = value & ~0x3;
 110 }
 111
 112 static CPUWriteMemoryFunc *pcie500_cfgaddr_write[] = {
 113     &pcie500_cfgaddr_writel,
 114     &pcie500_cfgaddr_writel,
 115     &pcie500_cfgaddr_writel,
 116 };
 117
 118 static CPUReadMemoryFunc *pcie500_cfgdata_read[] = {
 119     &pci_host_data_readb,
 120     &pci_host_data_readw,
 121     &pci_host_data_readl,
 122 };
 123
 124 static CPUWriteMemoryFunc *pcie500_cfgdata_write[] = {
 125     &pci_host_data_writeb,
 126     &pci_host_data_writew,
 127     &pci_host_data_writel,
 128 };
 129
 130 static uint32_t pci_reg_read4(void *opaque, target_phys_addr_t addr)
 131 {
 132     PPCE500PCIState *pci = opaque;
 133     unsigned long win;
 134     uint32_t value = 0;
 135
 136     win = addr & 0xfe0;
 137
 138     switch (win) {
 139     case PPCE500_PCI_OW1:
 140     case PPCE500_PCI_OW2:
 141     case PPCE500_PCI_OW3:
 142     case PPCE500_PCI_OW4:
 143         switch (addr & 0xC) {
 144         case PCI_POTAR: value = pci->pob[(addr >> 5) & 0x7].potar; break;
 145         case PCI_POTEAR: value = pci->pob[(addr >> 5) & 0x7].potear; break;
 146         case PCI_POWBAR: value = pci->pob[(addr >> 5) & 0x7].powbar; break;
 147         case PCI_POWAR: value = pci->pob[(addr >> 5) & 0x7].powar; break;
 148         default: break;
 149         }
 150         break;
 151
 152     case PPCE500_PCI_IW3:
 153     case PPCE500_PCI_IW2:
 154     case PPCE500_PCI_IW1:
 155         switch (addr & 0xC) {
 156         case PCI_PITAR: value = pci->pib[(addr >> 5) & 0x3].pitar; break;
 157         case PCI_PIWBAR: value = pci->pib[(addr >> 5) & 0x3].piwbar; break;
 158         case PCI_PIWBEAR: value = pci->pib[(addr >> 5) & 0x3].piwbear; break;
 159         case PCI_PIWAR: value = pci->pib[(addr >> 5) & 0x3].piwar; break;
 160         default: break;
 161         };
 162         break;
 163
 164     case PPCE500_PCI_GASKET_TIMR:
 165         value = pci->gasket_time;
 166         break;
 167
 168     default:
 169         break;
 170     }
 171
 172     pci_debug("%s: win:%lx(addr:%Lx) -> value:%x\n",__func__,win,addr,value);
 173     return value;
 174 }
 175
 176 static CPUReadMemoryFunc *e500_pci_reg_read[] = {
 177     &pci_reg_read4,
 178     &pci_reg_read4,
 179     &pci_reg_read4,
 180 };
 181
 182 static void pci_reg_write4(void *opaque, target_phys_addr_t addr,
 183                                uint32_t value)
 184 {
 185     PPCE500PCIState *pci = opaque;
 186     unsigned long win;
 187
 188     win = addr & 0xfe0;
 189
 190     pci_debug("%s: value:%x -> win:%lx(addr:%Lx)\n",__func__,value,win,addr);
 191
 192     switch (win) {
 193     case PPCE500_PCI_OW1:
 194     case PPCE500_PCI_OW2:
 195     case PPCE500_PCI_OW3:
 196     case PPCE500_PCI_OW4:
 197         switch (addr & 0xC) {
 198         case PCI_POTAR: pci->pob[(addr >> 5) & 0x7].potar = value; break;
 199         case PCI_POTEAR: pci->pob[(addr >> 5) & 0x7].potear = value; break;
 200         case PCI_POWBAR: pci->pob[(addr >> 5) & 0x7].powbar = value; break;
 201         case PCI_POWAR: pci->pob[(addr >> 5) & 0x7].powar = value; break;
 202         default: break;
 203         };
 204         break;
 205
 206     case PPCE500_PCI_IW3:
 207     case PPCE500_PCI_IW2:
 208     case PPCE500_PCI_IW1:
 209         switch (addr & 0xC) {
 210         case PCI_PITAR: pci->pib[(addr >> 5) & 0x3].pitar = value; break;
 211         case PCI_PIWBAR: pci->pib[(addr >> 5) & 0x3].piwbar = value; break;
 212         case PCI_PIWBEAR: pci->pib[(addr >> 5) & 0x3].piwbear = value; break;
 213         case PCI_PIWAR: pci->pib[(addr >> 5) & 0x3].piwar = value; break;
 214         default: break;
 215         };
 216         break;
 217
 218     case PPCE500_PCI_GASKET_TIMR:
 219         pci->gasket_time = value;
 220         break;
 221
 222     default:
 223         break;
 224     };
 225 }
 226
 227 static CPUWriteMemoryFunc *e500_pci_reg_write[] = {
 228     &pci_reg_write4,
 229     &pci_reg_write4,
 230     &pci_reg_write4,
 231 };
 232
 233 static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 234 {
 235     int devno = pci_dev->devfn >> 3, ret = 0;
 236
 237     switch (devno) {
 238         /* Two PCI slot */
 239         case 0x11:
 240         case 0x12:
 241             ret = (irq_num + devno - 0x10) % 4;
 242             break;
 243         default:
 244             printf("Error:%s:unknow dev number\n", __func__);
 245     }
 246
 247     pci_debug("%s: devfn %x irq %d -> %d  devno:%x\n", __func__,
 248            pci_dev->devfn, irq_num, ret, devno);
 249
 250     return ret;
 251 }
 252
 253 static void mpc85xx_pci_set_irq(qemu_irq *pic, int irq_num, int level)
 254 {
 255     pci_debug("%s: PCI irq %d, level:%d\n", __func__, irq_num, level);
 256
 257     qemu_set_irq(pic[irq_num], level);
 258 }
 259
 260 static void ppce500_pci_save(QEMUFile *f, void *opaque)
 261 {
 262     PPCE500PCIState *controller = opaque;
 263     int i;
 264
 265     pci_device_save(controller->pci_dev, f);
 266
 267     for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
 268         qemu_put_be32s(f, &controller->pob[i].potar);
 269         qemu_put_be32s(f, &controller->pob[i].potear);
 270         qemu_put_be32s(f, &controller->pob[i].powbar);
 271         qemu_put_be32s(f, &controller->pob[i].powar);
 272     }
 273
 274     for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
 275         qemu_put_be32s(f, &controller->pib[i].pitar);
 276         qemu_put_be32s(f, &controller->pib[i].piwbar);
 277         qemu_put_be32s(f, &controller->pib[i].piwbear);
 278         qemu_put_be32s(f, &controller->pib[i].piwar);
 279     }
 280     qemu_put_be32s(f, &controller->gasket_time);
 281 }
 282
 283 static int ppce500_pci_load(QEMUFile *f, void *opaque, int version_id)
 284 {
 285     PPCE500PCIState *controller = opaque;
 286     int i;
 287
 288     if (version_id != 1)
 289         return -EINVAL;
 290
 291     pci_device_load(controller->pci_dev, f);
 292
 293     for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
 294         qemu_get_be32s(f, &controller->pob[i].potar);
 295         qemu_get_be32s(f, &controller->pob[i].potear);
 296         qemu_get_be32s(f, &controller->pob[i].powbar);
 297         qemu_get_be32s(f, &controller->pob[i].powar);
 298     }
 299
 300     for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
 301         qemu_get_be32s(f, &controller->pib[i].pitar);
 302         qemu_get_be32s(f, &controller->pib[i].piwbar);
 303         qemu_get_be32s(f, &controller->pib[i].piwbear);
 304         qemu_get_be32s(f, &controller->pib[i].piwar);
 305     }
 306     qemu_get_be32s(f, &controller->gasket_time);
 307
 308     return 0;
 309 }
 310
 311 PCIBus *ppce500_pci_init(qemu_irq pci_irqs[4], target_phys_addr_t registers)
 312 {
 313     PPCE500PCIState *controller;
 314     PCIDevice *d;
 315     int index;
 316     static int ppce500_pci_id;
 317
 318     controller = qemu_mallocz(sizeof(PPCE500PCIState));
 319
 320     controller->pci_state.bus = pci_register_bus(mpc85xx_pci_set_irq,
 321                                                  mpc85xx_pci_map_irq,
 322                                                  pci_irqs, 0x88, 4);
 323     d = pci_register_device(controller->pci_state.bus,
 324                             "host bridge", sizeof(PCIDevice),
 325                             0, NULL, NULL);
 326
 327     pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_FSL);
 328     pci_config_set_device_id(d->config, PCI_DEVICE_ID_FSL_E500);
 329     pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_POWERPC);
 330
 331     controller->pci_dev = d;
 332
 333     /* CFGADDR */
 334     index = cpu_register_io_memory(0, pcie500_cfgaddr_read,
 335                                    pcie500_cfgaddr_write, controller);
 336     if (index < 0)
 337         goto free;
 338     cpu_register_physical_memory(registers + PCIE500_CFGADDR, 4, index);
 339
 340     /* CFGDATA */
 341     index = cpu_register_io_memory(0, pcie500_cfgdata_read,
 342                                    pcie500_cfgdata_write,
 343                                    &controller->pci_state);
 344     if (index < 0)
 345         goto free;
 346     cpu_register_physical_memory(registers + PCIE500_CFGDATA, 4, index);
 347
 348     index = cpu_register_io_memory(0, e500_pci_reg_read,
 349                                    e500_pci_reg_write, controller);
 350     if (index < 0)
 351         goto free;
 352     cpu_register_physical_memory(registers + PCIE500_REG_BASE,
 353                                    PCIE500_REG_SIZE, index);
 354
 355     /* XXX load/save code not tested. */
 356     register_savevm("ppce500_pci", ppce500_pci_id++, 1,
 357                     ppce500_pci_save, ppce500_pci_load, controller);
 358
 359     return controller->pci_state.bus;
 360
 361 free:
 362     printf("%s error\n", __func__);
 363     qemu_free(controller);
 364     return NULL;
 365 }