hw/ppc_prep.c

   1 /*
   2  * QEMU PPC PREP hardware System Emulator
   3  *
   4  * Copyright (c) 2003-2007 Jocelyn Mayer
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "nvram.h"
  26 #include "pc.h"
  27 #include "serial.h"
  28 #include "fdc.h"
  29 #include "net.h"
  30 #include "sysemu.h"
  31 #include "isa.h"
  32 #include "pci.h"
  33 #include "pci_host.h"
  34 #include "ppc.h"
  35 #include "boards.h"
  36 #include "qemu-log.h"
  37 #include "ide.h"
  38 #include "loader.h"
  39 #include "mc146818rtc.h"
  40 #include "blockdev.h"
  41 #include "arch_init.h"
  42 #include "exec-memory.h"
  43
  44 //#define HARD_DEBUG_PPC_IO
  45 //#define DEBUG_PPC_IO
  46
  47 /* SMP is not enabled, for now */
  48 #define MAX_CPUS 1
  49
  50 #define MAX_IDE_BUS 2
  51
  52 #define BIOS_SIZE (1024 * 1024)
  53 #define BIOS_FILENAME "ppc_rom.bin"
  54 #define KERNEL_LOAD_ADDR 0x01000000
  55 #define INITRD_LOAD_ADDR 0x01800000
  56
  57 #if defined (HARD_DEBUG_PPC_IO) && !defined (DEBUG_PPC_IO)
  58 #define DEBUG_PPC_IO
  59 #endif
  60
  61 #if defined (HARD_DEBUG_PPC_IO)
  62 #define PPC_IO_DPRINTF(fmt, ...)                         \
  63 do {                                                     \
  64     if (qemu_loglevel_mask(CPU_LOG_IOPORT)) {            \
  65         qemu_log("%s: " fmt, __func__ , ## __VA_ARGS__); \
  66     } else {                                             \
  67         printf("%s : " fmt, __func__ , ## __VA_ARGS__);  \
  68     }                                                    \
  69 } while (0)
  70 #elif defined (DEBUG_PPC_IO)
  71 #define PPC_IO_DPRINTF(fmt, ...) \
  72 qemu_log_mask(CPU_LOG_IOPORT, fmt, ## __VA_ARGS__)
  73 #else
  74 #define PPC_IO_DPRINTF(fmt, ...) do { } while (0)
  75 #endif
  76
  77 /* Constants for devices init */
  78 static const int ide_iobase[2] = { 0x1f0, 0x170 };
  79 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
  80 static const int ide_irq[2] = { 13, 13 };
  81
  82 #define NE2000_NB_MAX 6
  83
  84 static uint32_t ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
  85 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
  86
  87 /* ISA IO ports bridge */
  88 #define PPC_IO_BASE 0x80000000
  89
  90 /* PowerPC control and status registers */
  91 #if 0 // Not used
  92 static struct {
  93     /* IDs */
  94     uint32_t veni_devi;
  95     uint32_t revi;
  96     /* Control and status */
  97     uint32_t gcsr;
  98     uint32_t xcfr;
  99     uint32_t ct32;
 100     uint32_t mcsr;
 101     /* General purpose registers */
 102     uint32_t gprg[6];
 103     /* Exceptions */
 104     uint32_t feen;
 105     uint32_t fest;
 106     uint32_t fema;
 107     uint32_t fecl;
 108     uint32_t eeen;
 109     uint32_t eest;
 110     uint32_t eecl;
 111     uint32_t eeint;
 112     uint32_t eemck0;
 113     uint32_t eemck1;
 114     /* Error diagnostic */
 115 } XCSR;
 116
 117 static void PPC_XCSR_writeb (void *opaque,
 118                              hwaddr addr, uint32_t value)
 119 {
 120     printf("%s: 0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", __func__, addr,
 121            value);
 122 }
 123
 124 static void PPC_XCSR_writew (void *opaque,
 125                              hwaddr addr, uint32_t value)
 126 {
 127     printf("%s: 0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", __func__, addr,
 128            value);
 129 }
 130
 131 static void PPC_XCSR_writel (void *opaque,
 132                              hwaddr addr, uint32_t value)
 133 {
 134     printf("%s: 0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", __func__, addr,
 135            value);
 136 }
 137
 138 static uint32_t PPC_XCSR_readb (void *opaque, hwaddr addr)
 139 {
 140     uint32_t retval = 0;
 141
 142     printf("%s: 0x" TARGET_FMT_plx " <= %08" PRIx32 "\n", __func__, addr,
 143            retval);
 144
 145     return retval;
 146 }
 147
 148 static uint32_t PPC_XCSR_readw (void *opaque, hwaddr addr)
 149 {
 150     uint32_t retval = 0;
 151
 152     printf("%s: 0x" TARGET_FMT_plx " <= %08" PRIx32 "\n", __func__, addr,
 153            retval);
 154
 155     return retval;
 156 }
 157
 158 static uint32_t PPC_XCSR_readl (void *opaque, hwaddr addr)
 159 {
 160     uint32_t retval = 0;
 161
 162     printf("%s: 0x" TARGET_FMT_plx " <= %08" PRIx32 "\n", __func__, addr,
 163            retval);
 164
 165     return retval;
 166 }
 167
 168 static const MemoryRegionOps PPC_XCSR_ops = {
 169     .old_mmio = {
 170         .read = { PPC_XCSR_readb, PPC_XCSR_readw, PPC_XCSR_readl, },
 171         .write = { PPC_XCSR_writeb, PPC_XCSR_writew, PPC_XCSR_writel, },
 172     },
 173     .endianness = DEVICE_LITTLE_ENDIAN,
 174 };
 175
 176 #endif
 177
 178 /* Fake super-io ports for PREP platform (Intel 82378ZB) */
 179 typedef struct sysctrl_t {
 180     qemu_irq reset_irq;
 181     M48t59State *nvram;
 182     uint8_t state;
 183     uint8_t syscontrol;
 184     uint8_t fake_io[2];
 185     int contiguous_map;
 186     int endian;
 187 } sysctrl_t;
 188
 189 enum {
 190     STATE_HARDFILE = 0x01,
 191 };
 192
 193 static sysctrl_t *sysctrl;
 194
 195 static void PREP_io_write (void *opaque, uint32_t addr, uint32_t val)
 196 {
 197     sysctrl_t *sysctrl = opaque;
 198
 199     PPC_IO_DPRINTF("0x%08" PRIx32 " => 0x%02" PRIx32 "\n", addr - PPC_IO_BASE,
 200                    val);
 201     sysctrl->fake_io[addr - 0x0398] = val;
 202 }
 203
 204 static uint32_t PREP_io_read (void *opaque, uint32_t addr)
 205 {
 206     sysctrl_t *sysctrl = opaque;
 207
 208     PPC_IO_DPRINTF("0x%08" PRIx32 " <= 0x%02" PRIx32 "\n", addr - PPC_IO_BASE,
 209                    sysctrl->fake_io[addr - 0x0398]);
 210     return sysctrl->fake_io[addr - 0x0398];
 211 }
 212
 213 static void PREP_io_800_writeb (void *opaque, uint32_t addr, uint32_t val)
 214 {
 215     sysctrl_t *sysctrl = opaque;
 216
 217     PPC_IO_DPRINTF("0x%08" PRIx32 " => 0x%02" PRIx32 "\n",
 218                    addr - PPC_IO_BASE, val);
 219     switch (addr) {
 220     case 0x0092:
 221         /* Special port 92 */
 222         /* Check soft reset asked */
 223         if (val & 0x01) {
 224             qemu_irq_raise(sysctrl->reset_irq);
 225         } else {
 226             qemu_irq_lower(sysctrl->reset_irq);
 227         }
 228         /* Check LE mode */
 229         if (val & 0x02) {
 230             sysctrl->endian = 1;
 231         } else {
 232             sysctrl->endian = 0;
 233         }
 234         break;
 235     case 0x0800:
 236         /* Motorola CPU configuration register : read-only */
 237         break;
 238     case 0x0802:
 239         /* Motorola base module feature register : read-only */
 240         break;
 241     case 0x0803:
 242         /* Motorola base module status register : read-only */
 243         break;
 244     case 0x0808:
 245         /* Hardfile light register */
 246         if (val & 1)
 247             sysctrl->state |= STATE_HARDFILE;
 248         else
 249             sysctrl->state &= ~STATE_HARDFILE;
 250         break;
 251     case 0x0810:
 252         /* Password protect 1 register */
 253         if (sysctrl->nvram != NULL)
 254             m48t59_toggle_lock(sysctrl->nvram, 1);
 255         break;
 256     case 0x0812:
 257         /* Password protect 2 register */
 258         if (sysctrl->nvram != NULL)
 259             m48t59_toggle_lock(sysctrl->nvram, 2);
 260         break;
 261     case 0x0814:
 262         /* L2 invalidate register */
 263         //        tlb_flush(first_cpu, 1);
 264         break;
 265     case 0x081C:
 266         /* system control register */
 267         sysctrl->syscontrol = val & 0x0F;
 268         break;
 269     case 0x0850:
 270         /* I/O map type register */
 271         sysctrl->contiguous_map = val & 0x01;
 272         break;
 273     default:
 274         printf("ERROR: unaffected IO port write: %04" PRIx32
 275                " => %02" PRIx32"\n", addr, val);
 276         break;
 277     }
 278 }
 279
 280 static uint32_t PREP_io_800_readb (void *opaque, uint32_t addr)
 281 {
 282     sysctrl_t *sysctrl = opaque;
 283     uint32_t retval = 0xFF;
 284
 285     switch (addr) {
 286     case 0x0092:
 287         /* Special port 92 */
 288         retval = 0x00;
 289         break;
 290     case 0x0800:
 291         /* Motorola CPU configuration register */
 292         retval = 0xEF; /* MPC750 */
 293         break;
 294     case 0x0802:
 295         /* Motorola Base module feature register */
 296         retval = 0xAD; /* No ESCC, PMC slot neither ethernet */
 297         break;
 298     case 0x0803:
 299         /* Motorola base module status register */
 300         retval = 0xE0; /* Standard MPC750 */
 301         break;
 302     case 0x080C:
 303         /* Equipment present register:
 304          *  no L2 cache
 305          *  no upgrade processor
 306          *  no cards in PCI slots
 307          *  SCSI fuse is bad
 308          */
 309         retval = 0x3C;
 310         break;
 311     case 0x0810:
 312         /* Motorola base module extended feature register */
 313         retval = 0x39; /* No USB, CF and PCI bridge. NVRAM present */
 314         break;
 315     case 0x0814:
 316         /* L2 invalidate: don't care */
 317         break;
 318     case 0x0818:
 319         /* Keylock */
 320         retval = 0x00;
 321         break;
 322     case 0x081C:
 323         /* system control register
 324          * 7 - 6 / 1 - 0: L2 cache enable
 325          */
 326         retval = sysctrl->syscontrol;
 327         break;
 328     case 0x0823:
 329         /* */
 330         retval = 0x03; /* no L2 cache */
 331         break;
 332     case 0x0850:
 333         /* I/O map type register */
 334         retval = sysctrl->contiguous_map;
 335         break;
 336     default:
 337         printf("ERROR: unaffected IO port: %04" PRIx32 " read\n", addr);
 338         break;
 339     }
 340     PPC_IO_DPRINTF("0x%08" PRIx32 " <= 0x%02" PRIx32 "\n",
 341                    addr - PPC_IO_BASE, retval);
 342
 343     return retval;
 344 }
 345
 346 static inline hwaddr prep_IO_address(sysctrl_t *sysctrl,
 347                                                  hwaddr addr)
 348 {
 349     if (sysctrl->contiguous_map == 0) {
 350         /* 64 KB contiguous space for IOs */
 351         addr &= 0xFFFF;
 352     } else {
 353         /* 8 MB non-contiguous space for IOs */
 354         addr = (addr & 0x1F) | ((addr & 0x007FFF000) >> 7);
 355     }
 356
 357     return addr;
 358 }
 359
 360 static void PPC_prep_io_writeb (void *opaque, hwaddr addr,
 361                                 uint32_t value)
 362 {
 363     sysctrl_t *sysctrl = opaque;
 364
 365     addr = prep_IO_address(sysctrl, addr);
 366     cpu_outb(addr, value);
 367 }
 368
 369 static uint32_t PPC_prep_io_readb (void *opaque, hwaddr addr)
 370 {
 371     sysctrl_t *sysctrl = opaque;
 372     uint32_t ret;
 373
 374     addr = prep_IO_address(sysctrl, addr);
 375     ret = cpu_inb(addr);
 376
 377     return ret;
 378 }
 379
 380 static void PPC_prep_io_writew (void *opaque, hwaddr addr,
 381                                 uint32_t value)
 382 {
 383     sysctrl_t *sysctrl = opaque;
 384
 385     addr = prep_IO_address(sysctrl, addr);
 386     PPC_IO_DPRINTF("0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", addr, value);
 387     cpu_outw(addr, value);
 388 }
 389
 390 static uint32_t PPC_prep_io_readw (void *opaque, hwaddr addr)
 391 {
 392     sysctrl_t *sysctrl = opaque;
 393     uint32_t ret;
 394
 395     addr = prep_IO_address(sysctrl, addr);
 396     ret = cpu_inw(addr);
 397     PPC_IO_DPRINTF("0x" TARGET_FMT_plx " <= 0x%08" PRIx32 "\n", addr, ret);
 398
 399     return ret;
 400 }
 401
 402 static void PPC_prep_io_writel (void *opaque, hwaddr addr,
 403                                 uint32_t value)
 404 {
 405     sysctrl_t *sysctrl = opaque;
 406
 407     addr = prep_IO_address(sysctrl, addr);
 408     PPC_IO_DPRINTF("0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", addr, value);
 409     cpu_outl(addr, value);
 410 }
 411
 412 static uint32_t PPC_prep_io_readl (void *opaque, hwaddr addr)
 413 {
 414     sysctrl_t *sysctrl = opaque;
 415     uint32_t ret;
 416
 417     addr = prep_IO_address(sysctrl, addr);
 418     ret = cpu_inl(addr);
 419     PPC_IO_DPRINTF("0x" TARGET_FMT_plx " <= 0x%08" PRIx32 "\n", addr, ret);
 420
 421     return ret;
 422 }
 423
 424 static const MemoryRegionOps PPC_prep_io_ops = {
 425     .old_mmio = {
 426         .read = { PPC_prep_io_readb, PPC_prep_io_readw, PPC_prep_io_readl },
 427         .write = { PPC_prep_io_writeb, PPC_prep_io_writew, PPC_prep_io_writel },
 428     },
 429     .endianness = DEVICE_LITTLE_ENDIAN,
 430 };
 431
 432 #define NVRAM_SIZE        0x2000
 433
 434 static void cpu_request_exit(void *opaque, int irq, int level)
 435 {
 436     CPUPPCState *env = cpu_single_env;
 437
 438     if (env && level) {
 439         cpu_exit(env);
 440     }
 441 }
 442
 443 static void ppc_prep_reset(void *opaque)
 444 {
 445     PowerPCCPU *cpu = opaque;
 446
 447     cpu_reset(CPU(cpu));
 448 }
 449
 450 /* PowerPC PREP hardware initialisation */
 451 static void ppc_prep_init(QEMUMachineInitArgs *args)
 452 {
 453     ram_addr_t ram_size = args->ram_size;
 454     const char *cpu_model = args->cpu_model;
 455     const char *kernel_filename = args->kernel_filename;
 456     const char *kernel_cmdline = args->kernel_cmdline;
 457     const char *initrd_filename = args->initrd_filename;
 458     const char *boot_device = args->boot_device;
 459     MemoryRegion *sysmem = get_system_memory();
 460     PowerPCCPU *cpu = NULL;
 461     CPUPPCState *env = NULL;
 462     char *filename;
 463     nvram_t nvram;
 464     M48t59State *m48t59;
 465     MemoryRegion *PPC_io_memory = g_new(MemoryRegion, 1);
 466 #if 0
 467     MemoryRegion *xcsr = g_new(MemoryRegion, 1);
 468 #endif
 469     int linux_boot, i, nb_nics1, bios_size;
 470     MemoryRegion *ram = g_new(MemoryRegion, 1);
 471     MemoryRegion *bios = g_new(MemoryRegion, 1);
 472     uint32_t kernel_base, initrd_base;
 473     long kernel_size, initrd_size;
 474     DeviceState *dev;
 475     PCIHostState *pcihost;
 476     PCIBus *pci_bus;
 477     PCIDevice *pci;
 478     ISABus *isa_bus;
 479     qemu_irq *cpu_exit_irq;
 480     int ppc_boot_device;
 481     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 482     DriveInfo *fd[MAX_FD];
 483
 484     sysctrl = g_malloc0(sizeof(sysctrl_t));
 485
 486     linux_boot = (kernel_filename != NULL);
 487
 488     /* init CPUs */
 489     if (cpu_model == NULL)
 490         cpu_model = "602";
 491     for (i = 0; i < smp_cpus; i++) {
 492         cpu = cpu_ppc_init(cpu_model);
 493         if (cpu == NULL) {
 494             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 495             exit(1);
 496         }
 497         env = &cpu->env;
 498
 499         if (env->flags & POWERPC_FLAG_RTC_CLK) {
 500             /* POWER / PowerPC 601 RTC clock frequency is 7.8125 MHz */
 501             cpu_ppc_tb_init(env, 7812500UL);
 502         } else {
 503             /* Set time-base frequency to 100 Mhz */
 504             cpu_ppc_tb_init(env, 100UL * 1000UL * 1000UL);
 505         }
 506         qemu_register_reset(ppc_prep_reset, cpu);
 507     }
 508
 509     /* allocate RAM */
 510     memory_region_init_ram(ram, "ppc_prep.ram", ram_size);
 511     vmstate_register_ram_global(ram);
 512     memory_region_add_subregion(sysmem, 0, ram);
 513
 514     /* allocate and load BIOS */
 515     memory_region_init_ram(bios, "ppc_prep.bios", BIOS_SIZE);
 516     memory_region_set_readonly(bios, true);
 517     memory_region_add_subregion(sysmem, (uint32_t)(-BIOS_SIZE), bios);
 518     vmstate_register_ram_global(bios);
 519     if (bios_name == NULL)
 520         bios_name = BIOS_FILENAME;
 521     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 522     if (filename) {
 523         bios_size = get_image_size(filename);
 524     } else {
 525         bios_size = -1;
 526     }
 527     if (bios_size > 0 && bios_size <= BIOS_SIZE) {
 528         hwaddr bios_addr;
 529         bios_size = (bios_size + 0xfff) & ~0xfff;
 530         bios_addr = (uint32_t)(-bios_size);
 531         bios_size = load_image_targphys(filename, bios_addr, bios_size);
 532     }
 533     if (bios_size < 0 || bios_size > BIOS_SIZE) {
 534         hw_error("qemu: could not load PPC PREP bios '%s'\n", bios_name);
 535     }
 536     if (filename) {
 537         g_free(filename);
 538     }
 539
 540     if (linux_boot) {
 541         kernel_base = KERNEL_LOAD_ADDR;
 542         /* now we can load the kernel */
 543         kernel_size = load_image_targphys(kernel_filename, kernel_base,
 544                                           ram_size - kernel_base);
 545         if (kernel_size < 0) {
 546             hw_error("qemu: could not load kernel '%s'\n", kernel_filename);
 547             exit(1);
 548         }
 549         /* load initrd */
 550         if (initrd_filename) {
 551             initrd_base = INITRD_LOAD_ADDR;
 552             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 553                                               ram_size - initrd_base);
 554             if (initrd_size < 0) {
 555                 hw_error("qemu: could not load initial ram disk '%s'\n",
 556                           initrd_filename);
 557             }
 558         } else {
 559             initrd_base = 0;
 560             initrd_size = 0;
 561         }
 562         ppc_boot_device = 'm';
 563     } else {
 564         kernel_base = 0;
 565         kernel_size = 0;
 566         initrd_base = 0;
 567         initrd_size = 0;
 568         ppc_boot_device = '\0';
 569         /* For now, OHW cannot boot from the network. */
 570         for (i = 0; boot_device[i] != '\0'; i++) {
 571             if (boot_device[i] >= 'a' && boot_device[i] <= 'f') {
 572                 ppc_boot_device = boot_device[i];
 573                 break;
 574             }
 575         }
 576         if (ppc_boot_device == '\0') {
 577             fprintf(stderr, "No valid boot device for Mac99 machine\n");
 578             exit(1);
 579         }
 580     }
 581
 582     if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
 583         hw_error("Only 6xx bus is supported on PREP machine\n");
 584     }
 585
 586     dev = qdev_create(NULL, "raven-pcihost");
 587     pcihost = PCI_HOST_BRIDGE(dev);
 588     pcihost->address_space = get_system_memory();
 589     object_property_add_child(qdev_get_machine(), "raven", OBJECT(dev), NULL);
 590     qdev_init_nofail(dev);
 591     pci_bus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
 592     if (pci_bus == NULL) {
 593         fprintf(stderr, "Couldn't create PCI host controller.\n");
 594         exit(1);
 595     }
 596
 597     /* PCI -> ISA bridge */
 598     pci = pci_create_simple(pci_bus, PCI_DEVFN(1, 0), "i82378");
 599     cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
 600     qdev_connect_gpio_out(&pci->qdev, 0,
 601                           first_cpu->irq_inputs[PPC6xx_INPUT_INT]);
 602     qdev_connect_gpio_out(&pci->qdev, 1, *cpu_exit_irq);
 603     sysbus_connect_irq(&pcihost->busdev, 0, qdev_get_gpio_in(&pci->qdev, 9));
 604     sysbus_connect_irq(&pcihost->busdev, 1, qdev_get_gpio_in(&pci->qdev, 11));
 605     sysbus_connect_irq(&pcihost->busdev, 2, qdev_get_gpio_in(&pci->qdev, 9));
 606     sysbus_connect_irq(&pcihost->busdev, 3, qdev_get_gpio_in(&pci->qdev, 11));
 607     isa_bus = DO_UPCAST(ISABus, qbus, qdev_get_child_bus(&pci->qdev, "isa.0"));
 608
 609     /* Register 8 MB of ISA IO space (needed for non-contiguous map) */
 610     memory_region_init_io(PPC_io_memory, &PPC_prep_io_ops, sysctrl,
 611                           "ppc-io", 0x00800000);
 612     memory_region_add_subregion(sysmem, 0x80000000, PPC_io_memory);
 613
 614     /* init basic PC hardware */
 615     pci_vga_init(pci_bus);
 616
 617     if (serial_hds[0])
 618         serial_isa_init(isa_bus, 0, serial_hds[0]);
 619     nb_nics1 = nb_nics;
 620     if (nb_nics1 > NE2000_NB_MAX)
 621         nb_nics1 = NE2000_NB_MAX;
 622     for(i = 0; i < nb_nics1; i++) {
 623         if (nd_table[i].model == NULL) {
 624             nd_table[i].model = g_strdup("ne2k_isa");
 625         }
 626         if (strcmp(nd_table[i].model, "ne2k_isa") == 0) {
 627             isa_ne2000_init(isa_bus, ne2000_io[i], ne2000_irq[i],
 628                             &nd_table[i]);
 629         } else {
 630             pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
 631         }
 632     }
 633
 634     ide_drive_get(hd, MAX_IDE_BUS);
 635     for(i = 0; i < MAX_IDE_BUS; i++) {
 636         isa_ide_init(isa_bus, ide_iobase[i], ide_iobase2[i], ide_irq[i],
 637                      hd[2 * i],
 638                      hd[2 * i + 1]);
 639     }
 640     isa_create_simple(isa_bus, "i8042");
 641
 642     //    SB16_init();
 643
 644     for(i = 0; i < MAX_FD; i++) {
 645         fd[i] = drive_get(IF_FLOPPY, 0, i);
 646     }
 647     fdctrl_init_isa(isa_bus, fd);
 648
 649     /* Register fake IO ports for PREP */
 650     sysctrl->reset_irq = first_cpu->irq_inputs[PPC6xx_INPUT_HRESET];
 651     register_ioport_read(0x398, 2, 1, &PREP_io_read, sysctrl);
 652     register_ioport_write(0x398, 2, 1, &PREP_io_write, sysctrl);
 653     /* System control ports */
 654     register_ioport_read(0x0092, 0x01, 1, &PREP_io_800_readb, sysctrl);
 655     register_ioport_write(0x0092, 0x01, 1, &PREP_io_800_writeb, sysctrl);
 656     register_ioport_read(0x0800, 0x52, 1, &PREP_io_800_readb, sysctrl);
 657     register_ioport_write(0x0800, 0x52, 1, &PREP_io_800_writeb, sysctrl);
 658     /* PowerPC control and status register group */
 659 #if 0
 660     memory_region_init_io(xcsr, &PPC_XCSR_ops, NULL, "ppc-xcsr", 0x1000);
 661     memory_region_add_subregion(sysmem, 0xFEFF0000, xcsr);
 662 #endif
 663
 664     if (usb_enabled(false)) {
 665         pci_create_simple(pci_bus, -1, "pci-ohci");
 666     }
 667
 668     m48t59 = m48t59_init_isa(isa_bus, 0x0074, NVRAM_SIZE, 59);
 669     if (m48t59 == NULL)
 670         return;
 671     sysctrl->nvram = m48t59;
 672
 673     /* Initialise NVRAM */
 674     nvram.opaque = m48t59;
 675     nvram.read_fn = &m48t59_read;
 676     nvram.write_fn = &m48t59_write;
 677     PPC_NVRAM_set_params(&nvram, NVRAM_SIZE, "PREP", ram_size, ppc_boot_device,
 678                          kernel_base, kernel_size,
 679                          kernel_cmdline,
 680                          initrd_base, initrd_size,
 681                          /* XXX: need an option to load a NVRAM image */
 682                          0,
 683                          graphic_width, graphic_height, graphic_depth);
 684
 685     /* Special port to get debug messages from Open-Firmware */
 686     register_ioport_write(0x0F00, 4, 1, &PPC_debug_write, NULL);
 687
 688     /* Initialize audio subsystem */
 689     audio_init(isa_bus, pci_bus);
 690 }
 691
 692 static QEMUMachine prep_machine = {
 693     .name = "prep",
 694     .desc = "PowerPC PREP platform",
 695     .init = ppc_prep_init,
 696     .max_cpus = MAX_CPUS,
 697 };
 698
 699 static void prep_machine_init(void)
 700 {
 701     qemu_register_machine(&prep_machine);
 702 }
 703
 704 machine_init(prep_machine_init);