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 "fdc.h"
  28 #include "net.h"
  29 #include "sysemu.h"
  30 #include "isa.h"
  31 #include "pci.h"
  32 #include "ppc.h"
  33 #include "boards.h"
  34 #include "qemu-log.h"
  35
  36 //#define HARD_DEBUG_PPC_IO
  37 //#define DEBUG_PPC_IO
  38
  39 /* SMP is not enabled, for now */
  40 #define MAX_CPUS 1
  41
  42 #define MAX_IDE_BUS 2
  43
  44 #define BIOS_SIZE (1024 * 1024)
  45 #define BIOS_FILENAME "ppc_rom.bin"
  46 #define KERNEL_LOAD_ADDR 0x01000000
  47 #define INITRD_LOAD_ADDR 0x01800000
  48
  49 #if defined (HARD_DEBUG_PPC_IO) && !defined (DEBUG_PPC_IO)
  50 #define DEBUG_PPC_IO
  51 #endif
  52
  53 #if defined (HARD_DEBUG_PPC_IO)
  54 #define PPC_IO_DPRINTF(fmt, ...)                         \
  55 do {                                                     \
  56     if (qemu_loglevel_mask(CPU_LOG_IOPORT)) {            \
  57         qemu_log("%s: " fmt, __func__ , ## __VA_ARGS__); \
  58     } else {                                             \
  59         printf("%s : " fmt, __func__ , ## __VA_ARGS__);  \
  60     }                                                    \
  61 } while (0)
  62 #elif defined (DEBUG_PPC_IO)
  63 #define PPC_IO_DPRINTF(fmt, ...) \
  64 qemu_log_mask(CPU_LOG_IOPORT, fmt, ## __VA_ARGS__)
  65 #else
  66 #define PPC_IO_DPRINTF(fmt, ...) do { } while (0)
  67 #endif
  68
  69 /* Constants for devices init */
  70 static const int ide_iobase[2] = { 0x1f0, 0x170 };
  71 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
  72 static const int ide_irq[2] = { 13, 13 };
  73
  74 #define NE2000_NB_MAX 6
  75
  76 static uint32_t ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
  77 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
  78
  79 //static PITState *pit;
  80
  81 /* ISA IO ports bridge */
  82 #define PPC_IO_BASE 0x80000000
  83
  84 #if 0
  85 /* Speaker port 0x61 */
  86 static int speaker_data_on;
  87 static int dummy_refresh_clock;
  88 #endif
  89
  90 static void speaker_ioport_write (void *opaque, uint32_t addr, uint32_t val)
  91 {
  92 #if 0
  93     speaker_data_on = (val >> 1) & 1;
  94     pit_set_gate(pit, 2, val & 1);
  95 #endif
  96 }
  97
  98 static uint32_t speaker_ioport_read (void *opaque, uint32_t addr)
  99 {
 100 #if 0
 101     int out;
 102     out = pit_get_out(pit, 2, qemu_get_clock(vm_clock));
 103     dummy_refresh_clock ^= 1;
 104     return (speaker_data_on << 1) | pit_get_gate(pit, 2) | (out << 5) |
 105         (dummy_refresh_clock << 4);
 106 #endif
 107     return 0;
 108 }
 109
 110 /* PCI intack register */
 111 /* Read-only register (?) */
 112 static void _PPC_intack_write (void *opaque,
 113                                target_phys_addr_t addr, uint32_t value)
 114 {
 115 //    printf("%s: 0x" PADDRX " => 0x%08" PRIx32 "\n", __func__, addr, value);
 116 }
 117
 118 static always_inline uint32_t _PPC_intack_read (target_phys_addr_t addr)
 119 {
 120     uint32_t retval = 0;
 121
 122     if ((addr & 0xf) == 0)
 123         retval = pic_intack_read(isa_pic);
 124 //   printf("%s: 0x" PADDRX " <= %08" PRIx32 "\n", __func__, addr, retval);
 125
 126     return retval;
 127 }
 128
 129 static uint32_t PPC_intack_readb (void *opaque, target_phys_addr_t addr)
 130 {
 131     return _PPC_intack_read(addr);
 132 }
 133
 134 static uint32_t PPC_intack_readw (void *opaque, target_phys_addr_t addr)
 135 {
 136 #ifdef TARGET_WORDS_BIGENDIAN
 137     return bswap16(_PPC_intack_read(addr));
 138 #else
 139     return _PPC_intack_read(addr);
 140 #endif
 141 }
 142
 143 static uint32_t PPC_intack_readl (void *opaque, target_phys_addr_t addr)
 144 {
 145 #ifdef TARGET_WORDS_BIGENDIAN
 146     return bswap32(_PPC_intack_read(addr));
 147 #else
 148     return _PPC_intack_read(addr);
 149 #endif
 150 }
 151
 152 static CPUWriteMemoryFunc *PPC_intack_write[] = {
 153     &_PPC_intack_write,
 154     &_PPC_intack_write,
 155     &_PPC_intack_write,
 156 };
 157
 158 static CPUReadMemoryFunc *PPC_intack_read[] = {
 159     &PPC_intack_readb,
 160     &PPC_intack_readw,
 161     &PPC_intack_readl,
 162 };
 163
 164 /* PowerPC control and status registers */
 165 #if 0 // Not used
 166 static struct {
 167     /* IDs */
 168     uint32_t veni_devi;
 169     uint32_t revi;
 170     /* Control and status */
 171     uint32_t gcsr;
 172     uint32_t xcfr;
 173     uint32_t ct32;
 174     uint32_t mcsr;
 175     /* General purpose registers */
 176     uint32_t gprg[6];
 177     /* Exceptions */
 178     uint32_t feen;
 179     uint32_t fest;
 180     uint32_t fema;
 181     uint32_t fecl;
 182     uint32_t eeen;
 183     uint32_t eest;
 184     uint32_t eecl;
 185     uint32_t eeint;
 186     uint32_t eemck0;
 187     uint32_t eemck1;
 188     /* Error diagnostic */
 189 } XCSR;
 190
 191 static void PPC_XCSR_writeb (void *opaque,
 192                              target_phys_addr_t addr, uint32_t value)
 193 {
 194     printf("%s: 0x" PADDRX " => 0x%08" PRIx32 "\n", __func__, addr, value);
 195 }
 196
 197 static void PPC_XCSR_writew (void *opaque,
 198                              target_phys_addr_t addr, uint32_t value)
 199 {
 200 #ifdef TARGET_WORDS_BIGENDIAN
 201     value = bswap16(value);
 202 #endif
 203     printf("%s: 0x" PADDRX " => 0x%08" PRIx32 "\n", __func__, addr, value);
 204 }
 205
 206 static void PPC_XCSR_writel (void *opaque,
 207                              target_phys_addr_t addr, uint32_t value)
 208 {
 209 #ifdef TARGET_WORDS_BIGENDIAN
 210     value = bswap32(value);
 211 #endif
 212     printf("%s: 0x" PADDRX " => 0x%08" PRIx32 "\n", __func__, addr, value);
 213 }
 214
 215 static uint32_t PPC_XCSR_readb (void *opaque, target_phys_addr_t addr)
 216 {
 217     uint32_t retval = 0;
 218
 219     printf("%s: 0x" PADDRX " <= %08" PRIx32 "\n", __func__, addr, retval);
 220
 221     return retval;
 222 }
 223
 224 static uint32_t PPC_XCSR_readw (void *opaque, target_phys_addr_t addr)
 225 {
 226     uint32_t retval = 0;
 227
 228     printf("%s: 0x" PADDRX " <= %08" PRIx32 "\n", __func__, addr, retval);
 229 #ifdef TARGET_WORDS_BIGENDIAN
 230     retval = bswap16(retval);
 231 #endif
 232
 233     return retval;
 234 }
 235
 236 static uint32_t PPC_XCSR_readl (void *opaque, target_phys_addr_t addr)
 237 {
 238     uint32_t retval = 0;
 239
 240     printf("%s: 0x" PADDRX " <= %08" PRIx32 "\n", __func__, addr, retval);
 241 #ifdef TARGET_WORDS_BIGENDIAN
 242     retval = bswap32(retval);
 243 #endif
 244
 245     return retval;
 246 }
 247
 248 static CPUWriteMemoryFunc *PPC_XCSR_write[] = {
 249     &PPC_XCSR_writeb,
 250     &PPC_XCSR_writew,
 251     &PPC_XCSR_writel,
 252 };
 253
 254 static CPUReadMemoryFunc *PPC_XCSR_read[] = {
 255     &PPC_XCSR_readb,
 256     &PPC_XCSR_readw,
 257     &PPC_XCSR_readl,
 258 };
 259 #endif
 260
 261 /* Fake super-io ports for PREP platform (Intel 82378ZB) */
 262 typedef struct sysctrl_t {
 263     qemu_irq reset_irq;
 264     m48t59_t *nvram;
 265     uint8_t state;
 266     uint8_t syscontrol;
 267     uint8_t fake_io[2];
 268     int contiguous_map;
 269     int endian;
 270 } sysctrl_t;
 271
 272 enum {
 273     STATE_HARDFILE = 0x01,
 274 };
 275
 276 static sysctrl_t *sysctrl;
 277
 278 static void PREP_io_write (void *opaque, uint32_t addr, uint32_t val)
 279 {
 280     sysctrl_t *sysctrl = opaque;
 281
 282     PPC_IO_DPRINTF("0x%08" PRIx32 " => 0x%02" PRIx32 "\n", addr - PPC_IO_BASE,
 283                    val);
 284     sysctrl->fake_io[addr - 0x0398] = val;
 285 }
 286
 287 static uint32_t PREP_io_read (void *opaque, uint32_t addr)
 288 {
 289     sysctrl_t *sysctrl = opaque;
 290
 291     PPC_IO_DPRINTF("0x%08" PRIx32 " <= 0x%02" PRIx32 "\n", addr - PPC_IO_BASE,
 292                    sysctrl->fake_io[addr - 0x0398]);
 293     return sysctrl->fake_io[addr - 0x0398];
 294 }
 295
 296 static void PREP_io_800_writeb (void *opaque, uint32_t addr, uint32_t val)
 297 {
 298     sysctrl_t *sysctrl = opaque;
 299
 300     PPC_IO_DPRINTF("0x%08" PRIx32 " => 0x%02" PRIx32 "\n",
 301                    addr - PPC_IO_BASE, val);
 302     switch (addr) {
 303     case 0x0092:
 304         /* Special port 92 */
 305         /* Check soft reset asked */
 306         if (val & 0x01) {
 307             qemu_irq_raise(sysctrl->reset_irq);
 308         } else {
 309             qemu_irq_lower(sysctrl->reset_irq);
 310         }
 311         /* Check LE mode */
 312         if (val & 0x02) {
 313             sysctrl->endian = 1;
 314         } else {
 315             sysctrl->endian = 0;
 316         }
 317         break;
 318     case 0x0800:
 319         /* Motorola CPU configuration register : read-only */
 320         break;
 321     case 0x0802:
 322         /* Motorola base module feature register : read-only */
 323         break;
 324     case 0x0803:
 325         /* Motorola base module status register : read-only */
 326         break;
 327     case 0x0808:
 328         /* Hardfile light register */
 329         if (val & 1)
 330             sysctrl->state |= STATE_HARDFILE;
 331         else
 332             sysctrl->state &= ~STATE_HARDFILE;
 333         break;
 334     case 0x0810:
 335         /* Password protect 1 register */
 336         if (sysctrl->nvram != NULL)
 337             m48t59_toggle_lock(sysctrl->nvram, 1);
 338         break;
 339     case 0x0812:
 340         /* Password protect 2 register */
 341         if (sysctrl->nvram != NULL)
 342             m48t59_toggle_lock(sysctrl->nvram, 2);
 343         break;
 344     case 0x0814:
 345         /* L2 invalidate register */
 346         //        tlb_flush(first_cpu, 1);
 347         break;
 348     case 0x081C:
 349         /* system control register */
 350         sysctrl->syscontrol = val & 0x0F;
 351         break;
 352     case 0x0850:
 353         /* I/O map type register */
 354         sysctrl->contiguous_map = val & 0x01;
 355         break;
 356     default:
 357         printf("ERROR: unaffected IO port write: %04" PRIx32
 358                " => %02" PRIx32"\n", addr, val);
 359         break;
 360     }
 361 }
 362
 363 static uint32_t PREP_io_800_readb (void *opaque, uint32_t addr)
 364 {
 365     sysctrl_t *sysctrl = opaque;
 366     uint32_t retval = 0xFF;
 367
 368     switch (addr) {
 369     case 0x0092:
 370         /* Special port 92 */
 371         retval = 0x00;
 372         break;
 373     case 0x0800:
 374         /* Motorola CPU configuration register */
 375         retval = 0xEF; /* MPC750 */
 376         break;
 377     case 0x0802:
 378         /* Motorola Base module feature register */
 379         retval = 0xAD; /* No ESCC, PMC slot neither ethernet */
 380         break;
 381     case 0x0803:
 382         /* Motorola base module status register */
 383         retval = 0xE0; /* Standard MPC750 */
 384         break;
 385     case 0x080C:
 386         /* Equipment present register:
 387          *  no L2 cache
 388          *  no upgrade processor
 389          *  no cards in PCI slots
 390          *  SCSI fuse is bad
 391          */
 392         retval = 0x3C;
 393         break;
 394     case 0x0810:
 395         /* Motorola base module extended feature register */
 396         retval = 0x39; /* No USB, CF and PCI bridge. NVRAM present */
 397         break;
 398     case 0x0814:
 399         /* L2 invalidate: don't care */
 400         break;
 401     case 0x0818:
 402         /* Keylock */
 403         retval = 0x00;
 404         break;
 405     case 0x081C:
 406         /* system control register
 407          * 7 - 6 / 1 - 0: L2 cache enable
 408          */
 409         retval = sysctrl->syscontrol;
 410         break;
 411     case 0x0823:
 412         /* */
 413         retval = 0x03; /* no L2 cache */
 414         break;
 415     case 0x0850:
 416         /* I/O map type register */
 417         retval = sysctrl->contiguous_map;
 418         break;
 419     default:
 420         printf("ERROR: unaffected IO port: %04" PRIx32 " read\n", addr);
 421         break;
 422     }
 423     PPC_IO_DPRINTF("0x%08" PRIx32 " <= 0x%02" PRIx32 "\n",
 424                    addr - PPC_IO_BASE, retval);
 425
 426     return retval;
 427 }
 428
 429 static always_inline target_phys_addr_t prep_IO_address (sysctrl_t *sysctrl,
 430                                                          target_phys_addr_t
 431                                                          addr)
 432 {
 433     if (sysctrl->contiguous_map == 0) {
 434         /* 64 KB contiguous space for IOs */
 435         addr &= 0xFFFF;
 436     } else {
 437         /* 8 MB non-contiguous space for IOs */
 438         addr = (addr & 0x1F) | ((addr & 0x007FFF000) >> 7);
 439     }
 440
 441     return addr;
 442 }
 443
 444 static void PPC_prep_io_writeb (void *opaque, target_phys_addr_t addr,
 445                                 uint32_t value)
 446 {
 447     sysctrl_t *sysctrl = opaque;
 448
 449     addr = prep_IO_address(sysctrl, addr);
 450     cpu_outb(NULL, addr, value);
 451 }
 452
 453 static uint32_t PPC_prep_io_readb (void *opaque, target_phys_addr_t addr)
 454 {
 455     sysctrl_t *sysctrl = opaque;
 456     uint32_t ret;
 457
 458     addr = prep_IO_address(sysctrl, addr);
 459     ret = cpu_inb(NULL, addr);
 460
 461     return ret;
 462 }
 463
 464 static void PPC_prep_io_writew (void *opaque, target_phys_addr_t addr,
 465                                 uint32_t value)
 466 {
 467     sysctrl_t *sysctrl = opaque;
 468
 469     addr = prep_IO_address(sysctrl, addr);
 470 #ifdef TARGET_WORDS_BIGENDIAN
 471     value = bswap16(value);
 472 #endif
 473     PPC_IO_DPRINTF("0x" PADDRX " => 0x%08" PRIx32 "\n", addr, value);
 474     cpu_outw(NULL, addr, value);
 475 }
 476
 477 static uint32_t PPC_prep_io_readw (void *opaque, target_phys_addr_t addr)
 478 {
 479     sysctrl_t *sysctrl = opaque;
 480     uint32_t ret;
 481
 482     addr = prep_IO_address(sysctrl, addr);
 483     ret = cpu_inw(NULL, addr);
 484 #ifdef TARGET_WORDS_BIGENDIAN
 485     ret = bswap16(ret);
 486 #endif
 487     PPC_IO_DPRINTF("0x" PADDRX " <= 0x%08" PRIx32 "\n", addr, ret);
 488
 489     return ret;
 490 }
 491
 492 static void PPC_prep_io_writel (void *opaque, target_phys_addr_t addr,
 493                                 uint32_t value)
 494 {
 495     sysctrl_t *sysctrl = opaque;
 496
 497     addr = prep_IO_address(sysctrl, addr);
 498 #ifdef TARGET_WORDS_BIGENDIAN
 499     value = bswap32(value);
 500 #endif
 501     PPC_IO_DPRINTF("0x" PADDRX " => 0x%08" PRIx32 "\n", addr, value);
 502     cpu_outl(NULL, addr, value);
 503 }
 504
 505 static uint32_t PPC_prep_io_readl (void *opaque, target_phys_addr_t addr)
 506 {
 507     sysctrl_t *sysctrl = opaque;
 508     uint32_t ret;
 509
 510     addr = prep_IO_address(sysctrl, addr);
 511     ret = cpu_inl(NULL, addr);
 512 #ifdef TARGET_WORDS_BIGENDIAN
 513     ret = bswap32(ret);
 514 #endif
 515     PPC_IO_DPRINTF("0x" PADDRX " <= 0x%08" PRIx32 "\n", addr, ret);
 516
 517     return ret;
 518 }
 519
 520 static CPUWriteMemoryFunc *PPC_prep_io_write[] = {
 521     &PPC_prep_io_writeb,
 522     &PPC_prep_io_writew,
 523     &PPC_prep_io_writel,
 524 };
 525
 526 static CPUReadMemoryFunc *PPC_prep_io_read[] = {
 527     &PPC_prep_io_readb,
 528     &PPC_prep_io_readw,
 529     &PPC_prep_io_readl,
 530 };
 531
 532 #define NVRAM_SIZE        0x2000
 533
 534 /* PowerPC PREP hardware initialisation */
 535 static void ppc_prep_init (ram_addr_t ram_size,
 536                            const char *boot_device,
 537                            const char *kernel_filename,
 538                            const char *kernel_cmdline,
 539                            const char *initrd_filename,
 540                            const char *cpu_model)
 541 {
 542     CPUState *env = NULL, *envs[MAX_CPUS];
 543     char *filename;
 544     nvram_t nvram;
 545     m48t59_t *m48t59;
 546     int PPC_io_memory;
 547     int linux_boot, i, nb_nics1, bios_size;
 548     ram_addr_t ram_offset, bios_offset;
 549     uint32_t kernel_base, kernel_size, initrd_base, initrd_size;
 550     PCIBus *pci_bus;
 551     qemu_irq *i8259;
 552     int ppc_boot_device;
 553     int index;
 554     BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 555     BlockDriverState *fd[MAX_FD];
 556
 557     sysctrl = qemu_mallocz(sizeof(sysctrl_t));
 558
 559     linux_boot = (kernel_filename != NULL);
 560
 561     /* init CPUs */
 562     if (cpu_model == NULL)
 563         cpu_model = "default";
 564     for (i = 0; i < smp_cpus; i++) {
 565         env = cpu_init(cpu_model);
 566         if (!env) {
 567             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 568             exit(1);
 569         }
 570         if (env->flags & POWERPC_FLAG_RTC_CLK) {
 571             /* POWER / PowerPC 601 RTC clock frequency is 7.8125 MHz */
 572             cpu_ppc_tb_init(env, 7812500UL);
 573         } else {
 574             /* Set time-base frequency to 100 Mhz */
 575             cpu_ppc_tb_init(env, 100UL * 1000UL * 1000UL);
 576         }
 577         qemu_register_reset(&cpu_ppc_reset, env);
 578         envs[i] = env;
 579     }
 580
 581     /* allocate RAM */
 582     ram_offset = qemu_ram_alloc(ram_size);
 583     cpu_register_physical_memory(0, ram_size, ram_offset);
 584
 585     /* allocate and load BIOS */
 586     bios_offset = qemu_ram_alloc(BIOS_SIZE);
 587     if (bios_name == NULL)
 588         bios_name = BIOS_FILENAME;
 589     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 590     if (filename) {
 591         bios_size = get_image_size(filename);
 592     } else {
 593         bios_size = -1;
 594     }
 595     if (bios_size > 0 && bios_size <= BIOS_SIZE) {
 596         target_phys_addr_t bios_addr;
 597         bios_size = (bios_size + 0xfff) & ~0xfff;
 598         bios_addr = (uint32_t)(-bios_size);
 599         cpu_register_physical_memory(bios_addr, bios_size,
 600                                      bios_offset | IO_MEM_ROM);
 601         bios_size = load_image_targphys(filename, bios_addr, bios_size);
 602     }
 603     if (bios_size < 0 || bios_size > BIOS_SIZE) {
 604         hw_error("qemu: could not load PPC PREP bios '%s'\n", bios_name);
 605     }
 606     if (filename) {
 607         qemu_free(filename);
 608     }
 609     if (env->nip < 0xFFF80000 && bios_size < 0x00100000) {
 610         hw_error("PowerPC 601 / 620 / 970 need a 1MB BIOS\n");
 611     }
 612
 613     if (linux_boot) {
 614         kernel_base = KERNEL_LOAD_ADDR;
 615         /* now we can load the kernel */
 616         kernel_size = load_image_targphys(kernel_filename, kernel_base,
 617                                           ram_size - kernel_base);
 618         if (kernel_size < 0) {
 619             hw_error("qemu: could not load kernel '%s'\n", kernel_filename);
 620             exit(1);
 621         }
 622         /* load initrd */
 623         if (initrd_filename) {
 624             initrd_base = INITRD_LOAD_ADDR;
 625             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 626                                               ram_size - initrd_base);
 627             if (initrd_size < 0) {
 628                 hw_error("qemu: could not load initial ram disk '%s'\n",
 629                           initrd_filename);
 630             }
 631         } else {
 632             initrd_base = 0;
 633             initrd_size = 0;
 634         }
 635         ppc_boot_device = 'm';
 636     } else {
 637         kernel_base = 0;
 638         kernel_size = 0;
 639         initrd_base = 0;
 640         initrd_size = 0;
 641         ppc_boot_device = '\0';
 642         /* For now, OHW cannot boot from the network. */
 643         for (i = 0; boot_device[i] != '\0'; i++) {
 644             if (boot_device[i] >= 'a' && boot_device[i] <= 'f') {
 645                 ppc_boot_device = boot_device[i];
 646                 break;
 647             }
 648         }
 649         if (ppc_boot_device == '\0') {
 650             fprintf(stderr, "No valid boot device for Mac99 machine\n");
 651             exit(1);
 652         }
 653     }
 654
 655     isa_mem_base = 0xc0000000;
 656     if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
 657         hw_error("Only 6xx bus is supported on PREP machine\n");
 658     }
 659     i8259 = i8259_init(first_cpu->irq_inputs[PPC6xx_INPUT_INT]);
 660     pci_bus = pci_prep_init(i8259);
 661     //    pci_bus = i440fx_init();
 662     /* Register 8 MB of ISA IO space (needed for non-contiguous map) */
 663     PPC_io_memory = cpu_register_io_memory(PPC_prep_io_read,
 664                                            PPC_prep_io_write, sysctrl);
 665     cpu_register_physical_memory(0x80000000, 0x00800000, PPC_io_memory);
 666
 667     /* init basic PC hardware */
 668     pci_vga_init(pci_bus, 0, 0);
 669     //    openpic = openpic_init(0x00000000, 0xF0000000, 1);
 670     //    pit = pit_init(0x40, i8259[0]);
 671     rtc_init(0x70, i8259[8], 2000);
 672
 673     serial_init(0x3f8, i8259[4], 115200, serial_hds[0]);
 674     nb_nics1 = nb_nics;
 675     if (nb_nics1 > NE2000_NB_MAX)
 676         nb_nics1 = NE2000_NB_MAX;
 677     for(i = 0; i < nb_nics1; i++) {
 678         if (nd_table[i].model == NULL) {
 679             nd_table[i].model = "ne2k_isa";
 680         }
 681         if (strcmp(nd_table[i].model, "ne2k_isa") == 0) {
 682             isa_ne2000_init(ne2000_io[i], i8259[ne2000_irq[i]], &nd_table[i]);
 683         } else {
 684             pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
 685         }
 686     }
 687
 688     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
 689         fprintf(stderr, "qemu: too many IDE bus\n");
 690         exit(1);
 691     }
 692
 693     for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
 694         index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
 695         if (index != -1)
 696             hd[i] = drives_table[index].bdrv;
 697         else
 698             hd[i] = NULL;
 699     }
 700
 701     for(i = 0; i < MAX_IDE_BUS; i++) {
 702         isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
 703                      hd[2 * i],
 704                      hd[2 * i + 1]);
 705     }
 706     i8042_init(i8259[1], i8259[12], 0x60);
 707     DMA_init(1);
 708     //    SB16_init();
 709
 710     for(i = 0; i < MAX_FD; i++) {
 711         index = drive_get_index(IF_FLOPPY, 0, i);
 712         if (index != -1)
 713             fd[i] = drives_table[index].bdrv;
 714         else
 715             fd[i] = NULL;
 716     }
 717     fdctrl_init(i8259[6], 2, 0, 0x3f0, fd);
 718
 719     /* Register speaker port */
 720     register_ioport_read(0x61, 1, 1, speaker_ioport_read, NULL);
 721     register_ioport_write(0x61, 1, 1, speaker_ioport_write, NULL);
 722     /* Register fake IO ports for PREP */
 723     sysctrl->reset_irq = first_cpu->irq_inputs[PPC6xx_INPUT_HRESET];
 724     register_ioport_read(0x398, 2, 1, &PREP_io_read, sysctrl);
 725     register_ioport_write(0x398, 2, 1, &PREP_io_write, sysctrl);
 726     /* System control ports */
 727     register_ioport_read(0x0092, 0x01, 1, &PREP_io_800_readb, sysctrl);
 728     register_ioport_write(0x0092, 0x01, 1, &PREP_io_800_writeb, sysctrl);
 729     register_ioport_read(0x0800, 0x52, 1, &PREP_io_800_readb, sysctrl);
 730     register_ioport_write(0x0800, 0x52, 1, &PREP_io_800_writeb, sysctrl);
 731     /* PCI intack location */
 732     PPC_io_memory = cpu_register_io_memory(PPC_intack_read,
 733                                            PPC_intack_write, NULL);
 734     cpu_register_physical_memory(0xBFFFFFF0, 0x4, PPC_io_memory);
 735     /* PowerPC control and status register group */
 736 #if 0
 737     PPC_io_memory = cpu_register_io_memory(PPC_XCSR_read, PPC_XCSR_write,
 738                                            NULL);
 739     cpu_register_physical_memory(0xFEFF0000, 0x1000, PPC_io_memory);
 740 #endif
 741
 742     if (usb_enabled) {
 743         usb_ohci_init_pci(pci_bus, 3, -1);
 744     }
 745
 746     m48t59 = m48t59_init(i8259[8], 0, 0x0074, NVRAM_SIZE, 59);
 747     if (m48t59 == NULL)
 748         return;
 749     sysctrl->nvram = m48t59;
 750
 751     /* Initialise NVRAM */
 752     nvram.opaque = m48t59;
 753     nvram.read_fn = &m48t59_read;
 754     nvram.write_fn = &m48t59_write;
 755     PPC_NVRAM_set_params(&nvram, NVRAM_SIZE, "PREP", ram_size, ppc_boot_device,
 756                          kernel_base, kernel_size,
 757                          kernel_cmdline,
 758                          initrd_base, initrd_size,
 759                          /* XXX: need an option to load a NVRAM image */
 760                          0,
 761                          graphic_width, graphic_height, graphic_depth);
 762
 763     /* Special port to get debug messages from Open-Firmware */
 764     register_ioport_write(0x0F00, 4, 1, &PPC_debug_write, NULL);
 765 }
 766
 767 static QEMUMachine prep_machine = {
 768     .name = "prep",
 769     .desc = "PowerPC PREP platform",
 770     .init = ppc_prep_init,
 771     .max_cpus = MAX_CPUS,
 772 };
 773
 774 static void prep_machine_init(void)
 775 {
 776     qemu_register_machine(&prep_machine);
 777 }
 778
 779 machine_init(prep_machine_init);