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