hw/ppc/ppc405_boards.c

   1 /*
   2  * QEMU PowerPC 405 evaluation boards emulation
   3  *
   4  * Copyright (c) 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/hw.h"
  25 #include "hw/ppc/ppc.h"
  26 #include "ppc405.h"
  27 #include "hw/timer/m48t59.h"
  28 #include "hw/block/flash.h"
  29 #include "sysemu/sysemu.h"
  30 #include "sysemu/qtest.h"
  31 #include "sysemu/block-backend.h"
  32 #include "hw/boards.h"
  33 #include "qemu/log.h"
  34 #include "qemu/error-report.h"
  35 #include "hw/loader.h"
  36 #include "sysemu/block-backend.h"
  37 #include "sysemu/blockdev.h"
  38 #include "exec/address-spaces.h"
  39
  40 #define BIOS_FILENAME "ppc405_rom.bin"
  41 #define BIOS_SIZE (2048 * 1024)
  42
  43 #define KERNEL_LOAD_ADDR 0x00000000
  44 #define INITRD_LOAD_ADDR 0x01800000
  45
  46 #define USE_FLASH_BIOS
  47
  48 //#define DEBUG_BOARD_INIT
  49
  50 /*****************************************************************************/
  51 /* PPC405EP reference board (IBM) */
  52 /* Standalone board with:
  53  * - PowerPC 405EP CPU
  54  * - SDRAM (0x00000000)
  55  * - Flash (0xFFF80000)
  56  * - SRAM  (0xFFF00000)
  57  * - NVRAM (0xF0000000)
  58  * - FPGA  (0xF0300000)
  59  */
  60 typedef struct ref405ep_fpga_t ref405ep_fpga_t;
  61 struct ref405ep_fpga_t {
  62     uint8_t reg0;
  63     uint8_t reg1;
  64 };
  65
  66 static uint32_t ref405ep_fpga_readb (void *opaque, hwaddr addr)
  67 {
  68     ref405ep_fpga_t *fpga;
  69     uint32_t ret;
  70
  71     fpga = opaque;
  72     switch (addr) {
  73     case 0x0:
  74         ret = fpga->reg0;
  75         break;
  76     case 0x1:
  77         ret = fpga->reg1;
  78         break;
  79     default:
  80         ret = 0;
  81         break;
  82     }
  83
  84     return ret;
  85 }
  86
  87 static void ref405ep_fpga_writeb (void *opaque,
  88                                   hwaddr addr, uint32_t value)
  89 {
  90     ref405ep_fpga_t *fpga;
  91
  92     fpga = opaque;
  93     switch (addr) {
  94     case 0x0:
  95         /* Read only */
  96         break;
  97     case 0x1:
  98         fpga->reg1 = value;
  99         break;
 100     default:
 101         break;
 102     }
 103 }
 104
 105 static uint32_t ref405ep_fpga_readw (void *opaque, hwaddr addr)
 106 {
 107     uint32_t ret;
 108
 109     ret = ref405ep_fpga_readb(opaque, addr) << 8;
 110     ret |= ref405ep_fpga_readb(opaque, addr + 1);
 111
 112     return ret;
 113 }
 114
 115 static void ref405ep_fpga_writew (void *opaque,
 116                                   hwaddr addr, uint32_t value)
 117 {
 118     ref405ep_fpga_writeb(opaque, addr, (value >> 8) & 0xFF);
 119     ref405ep_fpga_writeb(opaque, addr + 1, value & 0xFF);
 120 }
 121
 122 static uint32_t ref405ep_fpga_readl (void *opaque, hwaddr addr)
 123 {
 124     uint32_t ret;
 125
 126     ret = ref405ep_fpga_readb(opaque, addr) << 24;
 127     ret |= ref405ep_fpga_readb(opaque, addr + 1) << 16;
 128     ret |= ref405ep_fpga_readb(opaque, addr + 2) << 8;
 129     ret |= ref405ep_fpga_readb(opaque, addr + 3);
 130
 131     return ret;
 132 }
 133
 134 static void ref405ep_fpga_writel (void *opaque,
 135                                   hwaddr addr, uint32_t value)
 136 {
 137     ref405ep_fpga_writeb(opaque, addr, (value >> 24) & 0xFF);
 138     ref405ep_fpga_writeb(opaque, addr + 1, (value >> 16) & 0xFF);
 139     ref405ep_fpga_writeb(opaque, addr + 2, (value >> 8) & 0xFF);
 140     ref405ep_fpga_writeb(opaque, addr + 3, value & 0xFF);
 141 }
 142
 143 static const MemoryRegionOps ref405ep_fpga_ops = {
 144     .old_mmio = {
 145         .read = {
 146             ref405ep_fpga_readb, ref405ep_fpga_readw, ref405ep_fpga_readl,
 147         },
 148         .write = {
 149             ref405ep_fpga_writeb, ref405ep_fpga_writew, ref405ep_fpga_writel,
 150         },
 151     },
 152     .endianness = DEVICE_NATIVE_ENDIAN,
 153 };
 154
 155 static void ref405ep_fpga_reset (void *opaque)
 156 {
 157     ref405ep_fpga_t *fpga;
 158
 159     fpga = opaque;
 160     fpga->reg0 = 0x00;
 161     fpga->reg1 = 0x0F;
 162 }
 163
 164 static void ref405ep_fpga_init(MemoryRegion *sysmem, uint32_t base)
 165 {
 166     ref405ep_fpga_t *fpga;
 167     MemoryRegion *fpga_memory = g_new(MemoryRegion, 1);
 168
 169     fpga = g_malloc0(sizeof(ref405ep_fpga_t));
 170     memory_region_init_io(fpga_memory, NULL, &ref405ep_fpga_ops, fpga,
 171                           "fpga", 0x00000100);
 172     memory_region_add_subregion(sysmem, base, fpga_memory);
 173     qemu_register_reset(&ref405ep_fpga_reset, fpga);
 174 }
 175
 176 static void ref405ep_init(MachineState *machine)
 177 {
 178     ram_addr_t ram_size = machine->ram_size;
 179     const char *kernel_filename = machine->kernel_filename;
 180     const char *kernel_cmdline = machine->kernel_cmdline;
 181     const char *initrd_filename = machine->initrd_filename;
 182     char *filename;
 183     ppc4xx_bd_info_t bd;
 184     CPUPPCState *env;
 185     qemu_irq *pic;
 186     MemoryRegion *bios;
 187     MemoryRegion *sram = g_new(MemoryRegion, 1);
 188     ram_addr_t bdloc;
 189     MemoryRegion *ram_memories = g_malloc(2 * sizeof(*ram_memories));
 190     hwaddr ram_bases[2], ram_sizes[2];
 191     target_ulong sram_size;
 192     long bios_size;
 193     //int phy_addr = 0;
 194     //static int phy_addr = 1;
 195     target_ulong kernel_base, initrd_base;
 196     long kernel_size, initrd_size;
 197     int linux_boot;
 198     int fl_idx, fl_sectors, len;
 199     DriveInfo *dinfo;
 200     MemoryRegion *sysmem = get_system_memory();
 201
 202     /* XXX: fix this */
 203     memory_region_allocate_system_memory(&ram_memories[0], NULL, "ef405ep.ram",
 204                                          0x08000000);
 205     ram_bases[0] = 0;
 206     ram_sizes[0] = 0x08000000;
 207     memory_region_init(&ram_memories[1], NULL, "ef405ep.ram1", 0);
 208     ram_bases[1] = 0x00000000;
 209     ram_sizes[1] = 0x00000000;
 210     ram_size = 128 * 1024 * 1024;
 211 #ifdef DEBUG_BOARD_INIT
 212     printf("%s: register cpu\n", __func__);
 213 #endif
 214     env = ppc405ep_init(sysmem, ram_memories, ram_bases, ram_sizes,
 215                         33333333, &pic, kernel_filename == NULL ? 0 : 1);
 216     /* allocate SRAM */
 217     sram_size = 512 * 1024;
 218     memory_region_init_ram(sram, NULL, "ef405ep.sram", sram_size, &error_abort);
 219     vmstate_register_ram_global(sram);
 220     memory_region_add_subregion(sysmem, 0xFFF00000, sram);
 221     /* allocate and load BIOS */
 222 #ifdef DEBUG_BOARD_INIT
 223     printf("%s: register BIOS\n", __func__);
 224 #endif
 225     fl_idx = 0;
 226 #ifdef USE_FLASH_BIOS
 227     dinfo = drive_get(IF_PFLASH, 0, fl_idx);
 228     if (dinfo) {
 229         BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
 230
 231         bios_size = blk_getlength(blk);
 232         fl_sectors = (bios_size + 65535) >> 16;
 233 #ifdef DEBUG_BOARD_INIT
 234         printf("Register parallel flash %d size %lx"
 235                " at addr %lx '%s' %d\n",
 236                fl_idx, bios_size, -bios_size,
 237                blk_name(blk), fl_sectors);
 238 #endif
 239         pflash_cfi02_register((uint32_t)(-bios_size),
 240                               NULL, "ef405ep.bios", bios_size,
 241                               blk, 65536, fl_sectors, 1,
 242                               2, 0x0001, 0x22DA, 0x0000, 0x0000, 0x555, 0x2AA,
 243                               1);
 244         fl_idx++;
 245     } else
 246 #endif
 247     {
 248 #ifdef DEBUG_BOARD_INIT
 249         printf("Load BIOS from file\n");
 250 #endif
 251         bios = g_new(MemoryRegion, 1);
 252         memory_region_init_ram(bios, NULL, "ef405ep.bios", BIOS_SIZE,
 253                                &error_abort);
 254         vmstate_register_ram_global(bios);
 255
 256         if (bios_name == NULL)
 257             bios_name = BIOS_FILENAME;
 258         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 259         if (filename) {
 260             bios_size = load_image(filename, memory_region_get_ram_ptr(bios));
 261             g_free(filename);
 262             if (bios_size < 0 || bios_size > BIOS_SIZE) {
 263                 error_report("Could not load PowerPC BIOS '%s'", bios_name);
 264                 exit(1);
 265             }
 266             bios_size = (bios_size + 0xfff) & ~0xfff;
 267             memory_region_add_subregion(sysmem, (uint32_t)(-bios_size), bios);
 268         } else if (!qtest_enabled() || kernel_filename != NULL) {
 269             error_report("Could not load PowerPC BIOS '%s'", bios_name);
 270             exit(1);
 271         } else {
 272             /* Avoid an uninitialized variable warning */
 273             bios_size = -1;
 274         }
 275         memory_region_set_readonly(bios, true);
 276     }
 277     /* Register FPGA */
 278 #ifdef DEBUG_BOARD_INIT
 279     printf("%s: register FPGA\n", __func__);
 280 #endif
 281     ref405ep_fpga_init(sysmem, 0xF0300000);
 282     /* Register NVRAM */
 283 #ifdef DEBUG_BOARD_INIT
 284     printf("%s: register NVRAM\n", __func__);
 285 #endif
 286     m48t59_init(NULL, 0xF0000000, 0, 8192, 8);
 287     /* Load kernel */
 288     linux_boot = (kernel_filename != NULL);
 289     if (linux_boot) {
 290 #ifdef DEBUG_BOARD_INIT
 291         printf("%s: load kernel\n", __func__);
 292 #endif
 293         memset(&bd, 0, sizeof(bd));
 294         bd.bi_memstart = 0x00000000;
 295         bd.bi_memsize = ram_size;
 296         bd.bi_flashstart = -bios_size;
 297         bd.bi_flashsize = -bios_size;
 298         bd.bi_flashoffset = 0;
 299         bd.bi_sramstart = 0xFFF00000;
 300         bd.bi_sramsize = sram_size;
 301         bd.bi_bootflags = 0;
 302         bd.bi_intfreq = 133333333;
 303         bd.bi_busfreq = 33333333;
 304         bd.bi_baudrate = 115200;
 305         bd.bi_s_version[0] = 'Q';
 306         bd.bi_s_version[1] = 'M';
 307         bd.bi_s_version[2] = 'U';
 308         bd.bi_s_version[3] = '\0';
 309         bd.bi_r_version[0] = 'Q';
 310         bd.bi_r_version[1] = 'E';
 311         bd.bi_r_version[2] = 'M';
 312         bd.bi_r_version[3] = 'U';
 313         bd.bi_r_version[4] = '\0';
 314         bd.bi_procfreq = 133333333;
 315         bd.bi_plb_busfreq = 33333333;
 316         bd.bi_pci_busfreq = 33333333;
 317         bd.bi_opbfreq = 33333333;
 318         bdloc = ppc405_set_bootinfo(env, &bd, 0x00000001);
 319         env->gpr[3] = bdloc;
 320         kernel_base = KERNEL_LOAD_ADDR;
 321         /* now we can load the kernel */
 322         kernel_size = load_image_targphys(kernel_filename, kernel_base,
 323                                           ram_size - kernel_base);
 324         if (kernel_size < 0) {
 325             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 326                     kernel_filename);
 327             exit(1);
 328         }
 329         printf("Load kernel size %ld at " TARGET_FMT_lx,
 330                kernel_size, kernel_base);
 331         /* load initrd */
 332         if (initrd_filename) {
 333             initrd_base = INITRD_LOAD_ADDR;
 334             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 335                                               ram_size - initrd_base);
 336             if (initrd_size < 0) {
 337                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 338                         initrd_filename);
 339                 exit(1);
 340             }
 341         } else {
 342             initrd_base = 0;
 343             initrd_size = 0;
 344         }
 345         env->gpr[4] = initrd_base;
 346         env->gpr[5] = initrd_size;
 347         if (kernel_cmdline != NULL) {
 348             len = strlen(kernel_cmdline);
 349             bdloc -= ((len + 255) & ~255);
 350             cpu_physical_memory_write(bdloc, kernel_cmdline, len + 1);
 351             env->gpr[6] = bdloc;
 352             env->gpr[7] = bdloc + len;
 353         } else {
 354             env->gpr[6] = 0;
 355             env->gpr[7] = 0;
 356         }
 357         env->nip = KERNEL_LOAD_ADDR;
 358     } else {
 359         kernel_base = 0;
 360         kernel_size = 0;
 361         initrd_base = 0;
 362         initrd_size = 0;
 363         bdloc = 0;
 364     }
 365 #ifdef DEBUG_BOARD_INIT
 366     printf("bdloc " RAM_ADDR_FMT "\n", bdloc);
 367     printf("%s: Done\n", __func__);
 368 #endif
 369 }
 370
 371 static QEMUMachine ref405ep_machine = {
 372     .name = "ref405ep",
 373     .desc = "ref405ep",
 374     .init = ref405ep_init,
 375 };
 376
 377 /*****************************************************************************/
 378 /* AMCC Taihu evaluation board */
 379 /* - PowerPC 405EP processor
 380  * - SDRAM               128 MB at 0x00000000
 381  * - Boot flash          2 MB   at 0xFFE00000
 382  * - Application flash   32 MB  at 0xFC000000
 383  * - 2 serial ports
 384  * - 2 ethernet PHY
 385  * - 1 USB 1.1 device    0x50000000
 386  * - 1 LCD display       0x50100000
 387  * - 1 CPLD              0x50100000
 388  * - 1 I2C EEPROM
 389  * - 1 I2C thermal sensor
 390  * - a set of LEDs
 391  * - bit-bang SPI port using GPIOs
 392  * - 1 EBC interface connector 0 0x50200000
 393  * - 1 cardbus controller + expansion slot.
 394  * - 1 PCI expansion slot.
 395  */
 396 typedef struct taihu_cpld_t taihu_cpld_t;
 397 struct taihu_cpld_t {
 398     uint8_t reg0;
 399     uint8_t reg1;
 400 };
 401
 402 static uint32_t taihu_cpld_readb (void *opaque, hwaddr addr)
 403 {
 404     taihu_cpld_t *cpld;
 405     uint32_t ret;
 406
 407     cpld = opaque;
 408     switch (addr) {
 409     case 0x0:
 410         ret = cpld->reg0;
 411         break;
 412     case 0x1:
 413         ret = cpld->reg1;
 414         break;
 415     default:
 416         ret = 0;
 417         break;
 418     }
 419
 420     return ret;
 421 }
 422
 423 static void taihu_cpld_writeb (void *opaque,
 424                                hwaddr addr, uint32_t value)
 425 {
 426     taihu_cpld_t *cpld;
 427
 428     cpld = opaque;
 429     switch (addr) {
 430     case 0x0:
 431         /* Read only */
 432         break;
 433     case 0x1:
 434         cpld->reg1 = value;
 435         break;
 436     default:
 437         break;
 438     }
 439 }
 440
 441 static uint32_t taihu_cpld_readw (void *opaque, hwaddr addr)
 442 {
 443     uint32_t ret;
 444
 445     ret = taihu_cpld_readb(opaque, addr) << 8;
 446     ret |= taihu_cpld_readb(opaque, addr + 1);
 447
 448     return ret;
 449 }
 450
 451 static void taihu_cpld_writew (void *opaque,
 452                                hwaddr addr, uint32_t value)
 453 {
 454     taihu_cpld_writeb(opaque, addr, (value >> 8) & 0xFF);
 455     taihu_cpld_writeb(opaque, addr + 1, value & 0xFF);
 456 }
 457
 458 static uint32_t taihu_cpld_readl (void *opaque, hwaddr addr)
 459 {
 460     uint32_t ret;
 461
 462     ret = taihu_cpld_readb(opaque, addr) << 24;
 463     ret |= taihu_cpld_readb(opaque, addr + 1) << 16;
 464     ret |= taihu_cpld_readb(opaque, addr + 2) << 8;
 465     ret |= taihu_cpld_readb(opaque, addr + 3);
 466
 467     return ret;
 468 }
 469
 470 static void taihu_cpld_writel (void *opaque,
 471                                hwaddr addr, uint32_t value)
 472 {
 473     taihu_cpld_writel(opaque, addr, (value >> 24) & 0xFF);
 474     taihu_cpld_writel(opaque, addr + 1, (value >> 16) & 0xFF);
 475     taihu_cpld_writel(opaque, addr + 2, (value >> 8) & 0xFF);
 476     taihu_cpld_writeb(opaque, addr + 3, value & 0xFF);
 477 }
 478
 479 static const MemoryRegionOps taihu_cpld_ops = {
 480     .old_mmio = {
 481         .read = { taihu_cpld_readb, taihu_cpld_readw, taihu_cpld_readl, },
 482         .write = { taihu_cpld_writeb, taihu_cpld_writew, taihu_cpld_writel, },
 483     },
 484     .endianness = DEVICE_NATIVE_ENDIAN,
 485 };
 486
 487 static void taihu_cpld_reset (void *opaque)
 488 {
 489     taihu_cpld_t *cpld;
 490
 491     cpld = opaque;
 492     cpld->reg0 = 0x01;
 493     cpld->reg1 = 0x80;
 494 }
 495
 496 static void taihu_cpld_init(MemoryRegion *sysmem, uint32_t base)
 497 {
 498     taihu_cpld_t *cpld;
 499     MemoryRegion *cpld_memory = g_new(MemoryRegion, 1);
 500
 501     cpld = g_malloc0(sizeof(taihu_cpld_t));
 502     memory_region_init_io(cpld_memory, NULL, &taihu_cpld_ops, cpld, "cpld", 0x100);
 503     memory_region_add_subregion(sysmem, base, cpld_memory);
 504     qemu_register_reset(&taihu_cpld_reset, cpld);
 505 }
 506
 507 static void taihu_405ep_init(MachineState *machine)
 508 {
 509     ram_addr_t ram_size = machine->ram_size;
 510     const char *kernel_filename = machine->kernel_filename;
 511     const char *initrd_filename = machine->initrd_filename;
 512     char *filename;
 513     qemu_irq *pic;
 514     MemoryRegion *sysmem = get_system_memory();
 515     MemoryRegion *bios;
 516     MemoryRegion *ram_memories = g_malloc(2 * sizeof(*ram_memories));
 517     MemoryRegion *ram = g_malloc0(sizeof(*ram));
 518     hwaddr ram_bases[2], ram_sizes[2];
 519     long bios_size;
 520     target_ulong kernel_base, initrd_base;
 521     long kernel_size, initrd_size;
 522     int linux_boot;
 523     int fl_idx, fl_sectors;
 524     DriveInfo *dinfo;
 525
 526     /* RAM is soldered to the board so the size cannot be changed */
 527     ram_size = 0x08000000;
 528     memory_region_allocate_system_memory(ram, NULL, "taihu_405ep.ram",
 529                                          ram_size);
 530
 531     ram_bases[0] = 0;
 532     ram_sizes[0] = 0x04000000;
 533     memory_region_init_alias(&ram_memories[0], NULL,
 534                              "taihu_405ep.ram-0", ram, ram_bases[0],
 535                              ram_sizes[0]);
 536     ram_bases[1] = 0x04000000;
 537     ram_sizes[1] = 0x04000000;
 538     memory_region_init_alias(&ram_memories[1], NULL,
 539                              "taihu_405ep.ram-1", ram, ram_bases[1],
 540                              ram_sizes[1]);
 541 #ifdef DEBUG_BOARD_INIT
 542     printf("%s: register cpu\n", __func__);
 543 #endif
 544     ppc405ep_init(sysmem, ram_memories, ram_bases, ram_sizes,
 545                   33333333, &pic, kernel_filename == NULL ? 0 : 1);
 546     /* allocate and load BIOS */
 547 #ifdef DEBUG_BOARD_INIT
 548     printf("%s: register BIOS\n", __func__);
 549 #endif
 550     fl_idx = 0;
 551 #if defined(USE_FLASH_BIOS)
 552     dinfo = drive_get(IF_PFLASH, 0, fl_idx);
 553     if (dinfo) {
 554         BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
 555
 556         bios_size = blk_getlength(blk);
 557         /* XXX: should check that size is 2MB */
 558         //        bios_size = 2 * 1024 * 1024;
 559         fl_sectors = (bios_size + 65535) >> 16;
 560 #ifdef DEBUG_BOARD_INIT
 561         printf("Register parallel flash %d size %lx"
 562                " at addr %lx '%s' %d\n",
 563                fl_idx, bios_size, -bios_size,
 564                blk_name(blk), fl_sectors);
 565 #endif
 566         pflash_cfi02_register((uint32_t)(-bios_size),
 567                               NULL, "taihu_405ep.bios", bios_size,
 568                               blk, 65536, fl_sectors, 1,
 569                               4, 0x0001, 0x22DA, 0x0000, 0x0000, 0x555, 0x2AA,
 570                               1);
 571         fl_idx++;
 572     } else
 573 #endif
 574     {
 575 #ifdef DEBUG_BOARD_INIT
 576         printf("Load BIOS from file\n");
 577 #endif
 578         if (bios_name == NULL)
 579             bios_name = BIOS_FILENAME;
 580         bios = g_new(MemoryRegion, 1);
 581         memory_region_init_ram(bios, NULL, "taihu_405ep.bios", BIOS_SIZE,
 582                                &error_abort);
 583         vmstate_register_ram_global(bios);
 584         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 585         if (filename) {
 586             bios_size = load_image(filename, memory_region_get_ram_ptr(bios));
 587             g_free(filename);
 588             if (bios_size < 0 || bios_size > BIOS_SIZE) {
 589                 error_report("Could not load PowerPC BIOS '%s'", bios_name);
 590                 exit(1);
 591             }
 592             bios_size = (bios_size + 0xfff) & ~0xfff;
 593             memory_region_add_subregion(sysmem, (uint32_t)(-bios_size), bios);
 594         } else if (!qtest_enabled()) {
 595             error_report("Could not load PowerPC BIOS '%s'", bios_name);
 596             exit(1);
 597         }
 598         memory_region_set_readonly(bios, true);
 599     }
 600     /* Register Linux flash */
 601     dinfo = drive_get(IF_PFLASH, 0, fl_idx);
 602     if (dinfo) {
 603         BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
 604
 605         bios_size = blk_getlength(blk);
 606         /* XXX: should check that size is 32MB */
 607         bios_size = 32 * 1024 * 1024;
 608         fl_sectors = (bios_size + 65535) >> 16;
 609 #ifdef DEBUG_BOARD_INIT
 610         printf("Register parallel flash %d size %lx"
 611                " at addr " TARGET_FMT_lx " '%s'\n",
 612                fl_idx, bios_size, (target_ulong)0xfc000000,
 613                blk_name(blk));
 614 #endif
 615         pflash_cfi02_register(0xfc000000, NULL, "taihu_405ep.flash", bios_size,
 616                               blk, 65536, fl_sectors, 1,
 617                               4, 0x0001, 0x22DA, 0x0000, 0x0000, 0x555, 0x2AA,
 618                               1);
 619         fl_idx++;
 620     }
 621     /* Register CLPD & LCD display */
 622 #ifdef DEBUG_BOARD_INIT
 623     printf("%s: register CPLD\n", __func__);
 624 #endif
 625     taihu_cpld_init(sysmem, 0x50100000);
 626     /* Load kernel */
 627     linux_boot = (kernel_filename != NULL);
 628     if (linux_boot) {
 629 #ifdef DEBUG_BOARD_INIT
 630         printf("%s: load kernel\n", __func__);
 631 #endif
 632         kernel_base = KERNEL_LOAD_ADDR;
 633         /* now we can load the kernel */
 634         kernel_size = load_image_targphys(kernel_filename, kernel_base,
 635                                           ram_size - kernel_base);
 636         if (kernel_size < 0) {
 637             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 638                     kernel_filename);
 639             exit(1);
 640         }
 641         /* load initrd */
 642         if (initrd_filename) {
 643             initrd_base = INITRD_LOAD_ADDR;
 644             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 645                                               ram_size - initrd_base);
 646             if (initrd_size < 0) {
 647                 fprintf(stderr,
 648                         "qemu: could not load initial ram disk '%s'\n",
 649                         initrd_filename);
 650                 exit(1);
 651             }
 652         } else {
 653             initrd_base = 0;
 654             initrd_size = 0;
 655         }
 656     } else {
 657         kernel_base = 0;
 658         kernel_size = 0;
 659         initrd_base = 0;
 660         initrd_size = 0;
 661     }
 662 #ifdef DEBUG_BOARD_INIT
 663     printf("%s: Done\n", __func__);
 664 #endif
 665 }
 666
 667 static QEMUMachine taihu_machine = {
 668     .name = "taihu",
 669     .desc = "taihu",
 670     .init = taihu_405ep_init,
 671 };
 672
 673 static void ppc405_machine_init(void)
 674 {
 675     qemu_register_machine(&ref405ep_machine);
 676     qemu_register_machine(&taihu_machine);
 677 }
 678
 679 machine_init(ppc405_machine_init);