hw/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.h"
  25 #include "ppc.h"
  26 #include "ppc405.h"
  27 #include "nvram.h"
  28 #include "flash.h"
  29 #include "sysemu.h"
  30 #include "block.h"
  31 #include "boards.h"
  32
  33 extern int loglevel;
  34 extern FILE *logfile;
  35
  36 #define BIOS_FILENAME "ppc405_rom.bin"
  37 #undef BIOS_SIZE
  38 #define BIOS_SIZE (2048 * 1024)
  39
  40 #define KERNEL_LOAD_ADDR 0x00000000
  41 #define INITRD_LOAD_ADDR 0x01800000
  42
  43 #define USE_FLASH_BIOS
  44
  45 #define DEBUG_BOARD_INIT
  46
  47 /*****************************************************************************/
  48 /* PPC405EP reference board (IBM) */
  49 /* Standalone board with:
  50  * - PowerPC 405EP CPU
  51  * - SDRAM (0x00000000)
  52  * - Flash (0xFFF80000)
  53  * - SRAM  (0xFFF00000)
  54  * - NVRAM (0xF0000000)
  55  * - FPGA  (0xF0300000)
  56  */
  57 typedef struct ref405ep_fpga_t ref405ep_fpga_t;
  58 struct ref405ep_fpga_t {
  59     uint32_t base;
  60     uint8_t reg0;
  61     uint8_t reg1;
  62 };
  63
  64 static uint32_t ref405ep_fpga_readb (void *opaque, target_phys_addr_t addr)
  65 {
  66     ref405ep_fpga_t *fpga;
  67     uint32_t ret;
  68
  69     fpga = opaque;
  70     addr -= fpga->base;
  71     switch (addr) {
  72     case 0x0:
  73         ret = fpga->reg0;
  74         break;
  75     case 0x1:
  76         ret = fpga->reg1;
  77         break;
  78     default:
  79         ret = 0;
  80         break;
  81     }
  82
  83     return ret;
  84 }
  85
  86 static void ref405ep_fpga_writeb (void *opaque,
  87                                   target_phys_addr_t addr, uint32_t value)
  88 {
  89     ref405ep_fpga_t *fpga;
  90
  91     fpga = opaque;
  92     addr -= fpga->base;
  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, target_phys_addr_t 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                                   target_phys_addr_t 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, target_phys_addr_t 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                                   target_phys_addr_t addr, uint32_t value)
 136 {
 137     ref405ep_fpga_writel(opaque, addr, (value >> 24) & 0xFF);
 138     ref405ep_fpga_writel(opaque, addr + 1, (value >> 16) & 0xFF);
 139     ref405ep_fpga_writel(opaque, addr + 2, (value >> 8) & 0xFF);
 140     ref405ep_fpga_writeb(opaque, addr + 3, value & 0xFF);
 141 }
 142
 143 static CPUReadMemoryFunc *ref405ep_fpga_read[] = {
 144     &ref405ep_fpga_readb,
 145     &ref405ep_fpga_readw,
 146     &ref405ep_fpga_readl,
 147 };
 148
 149 static CPUWriteMemoryFunc *ref405ep_fpga_write[] = {
 150     &ref405ep_fpga_writeb,
 151     &ref405ep_fpga_writew,
 152     &ref405ep_fpga_writel,
 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 (uint32_t base)
 165 {
 166     ref405ep_fpga_t *fpga;
 167     int fpga_memory;
 168
 169     fpga = qemu_mallocz(sizeof(ref405ep_fpga_t));
 170     if (fpga != NULL) {
 171         fpga->base = base;
 172         fpga_memory = cpu_register_io_memory(0, ref405ep_fpga_read,
 173                                              ref405ep_fpga_write, fpga);
 174         cpu_register_physical_memory(base, 0x00000100, fpga_memory);
 175         ref405ep_fpga_reset(fpga);
 176         qemu_register_reset(&ref405ep_fpga_reset, fpga);
 177     }
 178 }
 179
 180 static void ref405ep_init (int ram_size, int vga_ram_size,
 181                            const char *boot_device, DisplayState *ds,
 182                            const char *kernel_filename,
 183                            const char *kernel_cmdline,
 184                            const char *initrd_filename,
 185                            const char *cpu_model)
 186 {
 187     char buf[1024];
 188     ppc4xx_bd_info_t bd;
 189     CPUPPCState *env;
 190     qemu_irq *pic;
 191     ram_addr_t sram_offset, bios_offset, bdloc;
 192     target_phys_addr_t ram_bases[2], ram_sizes[2];
 193     target_ulong sram_size, bios_size;
 194     //int phy_addr = 0;
 195     //static int phy_addr = 1;
 196     target_ulong kernel_base, kernel_size, initrd_base, initrd_size;
 197     int linux_boot;
 198     int fl_idx, fl_sectors, len;
 199     int ppc_boot_device = boot_device[0];
 200     int index;
 201
 202     /* XXX: fix this */
 203     ram_bases[0] = 0x00000000;
 204     ram_sizes[0] = 0x08000000;
 205     ram_bases[1] = 0x00000000;
 206     ram_sizes[1] = 0x00000000;
 207     ram_size = 128 * 1024 * 1024;
 208 #ifdef DEBUG_BOARD_INIT
 209     printf("%s: register cpu\n", __func__);
 210 #endif
 211     env = ppc405ep_init(ram_bases, ram_sizes, 33333333, &pic, &sram_offset,
 212                         kernel_filename == NULL ? 0 : 1);
 213     /* allocate SRAM */
 214 #ifdef DEBUG_BOARD_INIT
 215     printf("%s: register SRAM at offset %08lx\n", __func__, sram_offset);
 216 #endif
 217     sram_size = 512 * 1024;
 218     cpu_register_physical_memory(0xFFF00000, sram_size,
 219                                  sram_offset | IO_MEM_RAM);
 220     /* allocate and load BIOS */
 221 #ifdef DEBUG_BOARD_INIT
 222     printf("%s: register BIOS\n", __func__);
 223 #endif
 224     bios_offset = sram_offset + sram_size;
 225     fl_idx = 0;
 226 #ifdef USE_FLASH_BIOS
 227     index = drive_get_index(IF_PFLASH, 0, fl_idx);
 228     if (index != -1) {
 229         bios_size = bdrv_getlength(drives_table[index].bdrv);
 230         fl_sectors = (bios_size + 65535) >> 16;
 231 #ifdef DEBUG_BOARD_INIT
 232         printf("Register parallel flash %d size " ADDRX " at offset %08lx "
 233                " addr " ADDRX " '%s' %d\n",
 234                fl_idx, bios_size, bios_offset, -bios_size,
 235                bdrv_get_device_name(drives_table[index].bdrv), fl_sectors);
 236 #endif
 237         pflash_register((uint32_t)(-bios_size), bios_offset,
 238                         drives_table[index].bdrv, 65536, fl_sectors, 2,
 239                         0x0001, 0x22DA, 0x0000, 0x0000);
 240         fl_idx++;
 241     } else
 242 #endif
 243     {
 244 #ifdef DEBUG_BOARD_INIT
 245         printf("Load BIOS from file\n");
 246 #endif
 247         if (bios_name == NULL)
 248             bios_name = BIOS_FILENAME;
 249         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
 250         bios_size = load_image(buf, phys_ram_base + bios_offset);
 251         if (bios_size < 0 || bios_size > BIOS_SIZE) {
 252             fprintf(stderr, "qemu: could not load PowerPC bios '%s'\n", buf);
 253             exit(1);
 254         }
 255         bios_size = (bios_size + 0xfff) & ~0xfff;
 256         cpu_register_physical_memory((uint32_t)(-bios_size),
 257                                      bios_size, bios_offset | IO_MEM_ROM);
 258     }
 259     bios_offset += bios_size;
 260     /* Register FPGA */
 261 #ifdef DEBUG_BOARD_INIT
 262     printf("%s: register FPGA\n", __func__);
 263 #endif
 264     ref405ep_fpga_init(0xF0300000);
 265     /* Register NVRAM */
 266 #ifdef DEBUG_BOARD_INIT
 267     printf("%s: register NVRAM\n", __func__);
 268 #endif
 269     m48t59_init(NULL, 0xF0000000, 0, 8192, 8);
 270     /* Load kernel */
 271     linux_boot = (kernel_filename != NULL);
 272     if (linux_boot) {
 273 #ifdef DEBUG_BOARD_INIT
 274         printf("%s: load kernel\n", __func__);
 275 #endif
 276         memset(&bd, 0, sizeof(bd));
 277         bd.bi_memstart = 0x00000000;
 278         bd.bi_memsize = ram_size;
 279         bd.bi_flashstart = -bios_size;
 280         bd.bi_flashsize = -bios_size;
 281         bd.bi_flashoffset = 0;
 282         bd.bi_sramstart = 0xFFF00000;
 283         bd.bi_sramsize = sram_size;
 284         bd.bi_bootflags = 0;
 285         bd.bi_intfreq = 133333333;
 286         bd.bi_busfreq = 33333333;
 287         bd.bi_baudrate = 115200;
 288         bd.bi_s_version[0] = 'Q';
 289         bd.bi_s_version[1] = 'M';
 290         bd.bi_s_version[2] = 'U';
 291         bd.bi_s_version[3] = '\0';
 292         bd.bi_r_version[0] = 'Q';
 293         bd.bi_r_version[1] = 'E';
 294         bd.bi_r_version[2] = 'M';
 295         bd.bi_r_version[3] = 'U';
 296         bd.bi_r_version[4] = '\0';
 297         bd.bi_procfreq = 133333333;
 298         bd.bi_plb_busfreq = 33333333;
 299         bd.bi_pci_busfreq = 33333333;
 300         bd.bi_opbfreq = 33333333;
 301         bdloc = ppc405_set_bootinfo(env, &bd, 0x00000001);
 302         env->gpr[3] = bdloc;
 303         kernel_base = KERNEL_LOAD_ADDR;
 304         /* now we can load the kernel */
 305         kernel_size = load_image(kernel_filename, phys_ram_base + kernel_base);
 306         if (kernel_size < 0) {
 307             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 308                     kernel_filename);
 309             exit(1);
 310         }
 311         printf("Load kernel size " TARGET_FMT_ld " at " TARGET_FMT_lx
 312                " %02x %02x %02x %02x\n", kernel_size, kernel_base,
 313                *(char *)(phys_ram_base + kernel_base),
 314                *(char *)(phys_ram_base + kernel_base + 1),
 315                *(char *)(phys_ram_base + kernel_base + 2),
 316                *(char *)(phys_ram_base + kernel_base + 3));
 317         /* load initrd */
 318         if (initrd_filename) {
 319             initrd_base = INITRD_LOAD_ADDR;
 320             initrd_size = load_image(initrd_filename,
 321                                      phys_ram_base + initrd_base);
 322             if (initrd_size < 0) {
 323                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 324                         initrd_filename);
 325                 exit(1);
 326             }
 327         } else {
 328             initrd_base = 0;
 329             initrd_size = 0;
 330         }
 331         env->gpr[4] = initrd_base;
 332         env->gpr[5] = initrd_size;
 333         ppc_boot_device = 'm';
 334         if (kernel_cmdline != NULL) {
 335             len = strlen(kernel_cmdline);
 336             bdloc -= ((len + 255) & ~255);
 337             memcpy(phys_ram_base + bdloc, kernel_cmdline, len + 1);
 338             env->gpr[6] = bdloc;
 339             env->gpr[7] = bdloc + len;
 340         } else {
 341             env->gpr[6] = 0;
 342             env->gpr[7] = 0;
 343         }
 344         env->nip = KERNEL_LOAD_ADDR;
 345     } else {
 346         kernel_base = 0;
 347         kernel_size = 0;
 348         initrd_base = 0;
 349         initrd_size = 0;
 350         bdloc = 0;
 351     }
 352 #ifdef DEBUG_BOARD_INIT
 353     printf("%s: Done\n", __func__);
 354 #endif
 355     printf("bdloc %016lx %s\n",
 356            (unsigned long)bdloc, (char *)(phys_ram_base + bdloc));
 357 }
 358
 359 QEMUMachine ref405ep_machine = {
 360     "ref405ep",
 361     "ref405ep",
 362     ref405ep_init,
 363 };
 364
 365 /*****************************************************************************/
 366 /* AMCC Taihu evaluation board */
 367 /* - PowerPC 405EP processor
 368  * - SDRAM               128 MB at 0x00000000
 369  * - Boot flash          2 MB   at 0xFFE00000
 370  * - Application flash   32 MB  at 0xFC000000
 371  * - 2 serial ports
 372  * - 2 ethernet PHY
 373  * - 1 USB 1.1 device    0x50000000
 374  * - 1 LCD display       0x50100000
 375  * - 1 CPLD              0x50100000
 376  * - 1 I2C EEPROM
 377  * - 1 I2C thermal sensor
 378  * - a set of LEDs
 379  * - bit-bang SPI port using GPIOs
 380  * - 1 EBC interface connector 0 0x50200000
 381  * - 1 cardbus controller + expansion slot.
 382  * - 1 PCI expansion slot.
 383  */
 384 typedef struct taihu_cpld_t taihu_cpld_t;
 385 struct taihu_cpld_t {
 386     uint32_t base;
 387     uint8_t reg0;
 388     uint8_t reg1;
 389 };
 390
 391 static uint32_t taihu_cpld_readb (void *opaque, target_phys_addr_t addr)
 392 {
 393     taihu_cpld_t *cpld;
 394     uint32_t ret;
 395
 396     cpld = opaque;
 397     addr -= cpld->base;
 398     switch (addr) {
 399     case 0x0:
 400         ret = cpld->reg0;
 401         break;
 402     case 0x1:
 403         ret = cpld->reg1;
 404         break;
 405     default:
 406         ret = 0;
 407         break;
 408     }
 409
 410     return ret;
 411 }
 412
 413 static void taihu_cpld_writeb (void *opaque,
 414                                target_phys_addr_t addr, uint32_t value)
 415 {
 416     taihu_cpld_t *cpld;
 417
 418     cpld = opaque;
 419     addr -= cpld->base;
 420     switch (addr) {
 421     case 0x0:
 422         /* Read only */
 423         break;
 424     case 0x1:
 425         cpld->reg1 = value;
 426         break;
 427     default:
 428         break;
 429     }
 430 }
 431
 432 static uint32_t taihu_cpld_readw (void *opaque, target_phys_addr_t addr)
 433 {
 434     uint32_t ret;
 435
 436     ret = taihu_cpld_readb(opaque, addr) << 8;
 437     ret |= taihu_cpld_readb(opaque, addr + 1);
 438
 439     return ret;
 440 }
 441
 442 static void taihu_cpld_writew (void *opaque,
 443                                target_phys_addr_t addr, uint32_t value)
 444 {
 445     taihu_cpld_writeb(opaque, addr, (value >> 8) & 0xFF);
 446     taihu_cpld_writeb(opaque, addr + 1, value & 0xFF);
 447 }
 448
 449 static uint32_t taihu_cpld_readl (void *opaque, target_phys_addr_t addr)
 450 {
 451     uint32_t ret;
 452
 453     ret = taihu_cpld_readb(opaque, addr) << 24;
 454     ret |= taihu_cpld_readb(opaque, addr + 1) << 16;
 455     ret |= taihu_cpld_readb(opaque, addr + 2) << 8;
 456     ret |= taihu_cpld_readb(opaque, addr + 3);
 457
 458     return ret;
 459 }
 460
 461 static void taihu_cpld_writel (void *opaque,
 462                                target_phys_addr_t addr, uint32_t value)
 463 {
 464     taihu_cpld_writel(opaque, addr, (value >> 24) & 0xFF);
 465     taihu_cpld_writel(opaque, addr + 1, (value >> 16) & 0xFF);
 466     taihu_cpld_writel(opaque, addr + 2, (value >> 8) & 0xFF);
 467     taihu_cpld_writeb(opaque, addr + 3, value & 0xFF);
 468 }
 469
 470 static CPUReadMemoryFunc *taihu_cpld_read[] = {
 471     &taihu_cpld_readb,
 472     &taihu_cpld_readw,
 473     &taihu_cpld_readl,
 474 };
 475
 476 static CPUWriteMemoryFunc *taihu_cpld_write[] = {
 477     &taihu_cpld_writeb,
 478     &taihu_cpld_writew,
 479     &taihu_cpld_writel,
 480 };
 481
 482 static void taihu_cpld_reset (void *opaque)
 483 {
 484     taihu_cpld_t *cpld;
 485
 486     cpld = opaque;
 487     cpld->reg0 = 0x01;
 488     cpld->reg1 = 0x80;
 489 }
 490
 491 static void taihu_cpld_init (uint32_t base)
 492 {
 493     taihu_cpld_t *cpld;
 494     int cpld_memory;
 495
 496     cpld = qemu_mallocz(sizeof(taihu_cpld_t));
 497     if (cpld != NULL) {
 498         cpld->base = base;
 499         cpld_memory = cpu_register_io_memory(0, taihu_cpld_read,
 500                                              taihu_cpld_write, cpld);
 501         cpu_register_physical_memory(base, 0x00000100, cpld_memory);
 502         taihu_cpld_reset(cpld);
 503         qemu_register_reset(&taihu_cpld_reset, cpld);
 504     }
 505 }
 506
 507 static void taihu_405ep_init(int ram_size, int vga_ram_size,
 508                              const char *boot_device, DisplayState *ds,
 509                              const char *kernel_filename,
 510                              const char *kernel_cmdline,
 511                              const char *initrd_filename,
 512                              const char *cpu_model)
 513 {
 514     char buf[1024];
 515     CPUPPCState *env;
 516     qemu_irq *pic;
 517     ram_addr_t bios_offset;
 518     target_phys_addr_t ram_bases[2], ram_sizes[2];
 519     target_ulong bios_size;
 520     target_ulong kernel_base, kernel_size, initrd_base, initrd_size;
 521     int linux_boot;
 522     int fl_idx, fl_sectors;
 523     int ppc_boot_device = boot_device[0];
 524     int index;
 525
 526     /* RAM is soldered to the board so the size cannot be changed */
 527     ram_bases[0] = 0x00000000;
 528     ram_sizes[0] = 0x04000000;
 529     ram_bases[1] = 0x04000000;
 530     ram_sizes[1] = 0x04000000;
 531 #ifdef DEBUG_BOARD_INIT
 532     printf("%s: register cpu\n", __func__);
 533 #endif
 534     env = ppc405ep_init(ram_bases, ram_sizes, 33333333, &pic, &bios_offset,
 535                         kernel_filename == NULL ? 0 : 1);
 536     /* allocate and load BIOS */
 537 #ifdef DEBUG_BOARD_INIT
 538     printf("%s: register BIOS\n", __func__);
 539 #endif
 540     fl_idx = 0;
 541 #if defined(USE_FLASH_BIOS)
 542     index = drive_get_index(IF_PFLASH, 0, fl_idx);
 543     if (index != -1) {
 544         bios_size = bdrv_getlength(drives_table[index].bdrv);
 545         /* XXX: should check that size is 2MB */
 546         //        bios_size = 2 * 1024 * 1024;
 547         fl_sectors = (bios_size + 65535) >> 16;
 548 #ifdef DEBUG_BOARD_INIT
 549         printf("Register parallel flash %d size " ADDRX " at offset %08lx "
 550                " addr " ADDRX " '%s' %d\n",
 551                fl_idx, bios_size, bios_offset, -bios_size,
 552                bdrv_get_device_name(drives_table[index].bdrv), fl_sectors);
 553 #endif
 554         pflash_register((uint32_t)(-bios_size), bios_offset,
 555                         drives_table[index].bdrv, 65536, fl_sectors, 4,
 556                         0x0001, 0x22DA, 0x0000, 0x0000);
 557         fl_idx++;
 558     } else
 559 #endif
 560     {
 561 #ifdef DEBUG_BOARD_INIT
 562         printf("Load BIOS from file\n");
 563 #endif
 564         if (bios_name == NULL)
 565             bios_name = BIOS_FILENAME;
 566         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
 567         bios_size = load_image(buf, phys_ram_base + bios_offset);
 568         if (bios_size < 0 || bios_size > BIOS_SIZE) {
 569             fprintf(stderr, "qemu: could not load PowerPC bios '%s'\n", buf);
 570             exit(1);
 571         }
 572         bios_size = (bios_size + 0xfff) & ~0xfff;
 573         cpu_register_physical_memory((uint32_t)(-bios_size),
 574                                      bios_size, bios_offset | IO_MEM_ROM);
 575     }
 576     bios_offset += bios_size;
 577     /* Register Linux flash */
 578     index = drive_get_index(IF_PFLASH, 0, fl_idx);
 579     if (index != -1) {
 580         bios_size = bdrv_getlength(drives_table[index].bdrv);
 581         /* XXX: should check that size is 32MB */
 582         bios_size = 32 * 1024 * 1024;
 583         fl_sectors = (bios_size + 65535) >> 16;
 584 #ifdef DEBUG_BOARD_INIT
 585         printf("Register parallel flash %d size " ADDRX " at offset %08lx "
 586                " addr " ADDRX " '%s'\n",
 587                fl_idx, bios_size, bios_offset, (target_ulong)0xfc000000,
 588                bdrv_get_device_name(drives_table[index].bdrv));
 589 #endif
 590         pflash_register(0xfc000000, bios_offset, drives_table[index].bdrv,
 591                         65536, fl_sectors, 4,
 592                         0x0001, 0x22DA, 0x0000, 0x0000);
 593         fl_idx++;
 594     }
 595     /* Register CLPD & LCD display */
 596 #ifdef DEBUG_BOARD_INIT
 597     printf("%s: register CPLD\n", __func__);
 598 #endif
 599     taihu_cpld_init(0x50100000);
 600     /* Load kernel */
 601     linux_boot = (kernel_filename != NULL);
 602     if (linux_boot) {
 603 #ifdef DEBUG_BOARD_INIT
 604         printf("%s: load kernel\n", __func__);
 605 #endif
 606         kernel_base = KERNEL_LOAD_ADDR;
 607         /* now we can load the kernel */
 608         kernel_size = load_image(kernel_filename, phys_ram_base + kernel_base);
 609         if (kernel_size < 0) {
 610             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 611                     kernel_filename);
 612             exit(1);
 613         }
 614         /* load initrd */
 615         if (initrd_filename) {
 616             initrd_base = INITRD_LOAD_ADDR;
 617             initrd_size = load_image(initrd_filename,
 618                                      phys_ram_base + initrd_base);
 619             if (initrd_size < 0) {
 620                 fprintf(stderr,
 621                         "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     }
 636 #ifdef DEBUG_BOARD_INIT
 637     printf("%s: Done\n", __func__);
 638 #endif
 639 }
 640
 641 QEMUMachine taihu_machine = {
 642     "taihu",
 643     "taihu",
 644     taihu_405ep_init,
 645 };