hw/ppc/sam460ex.c

   1 /*
   2  * QEMU aCube Sam460ex board emulation
   3  *
   4  * Copyright (c) 2012 François Revol
   5  * Copyright (c) 2016-2018 BALATON Zoltan
   6  *
   7  * This file is derived from hw/ppc440_bamboo.c,
   8  * the copyright for that material belongs to the original owners.
   9  *
  10  * This work is licensed under the GNU GPL license version 2 or later.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qemu/units.h"
  16 #include "qemu-common.h"
  17 #include "qemu/error-report.h"
  18 #include "qapi/error.h"
  19 #include "hw/hw.h"
  20 #include "hw/boards.h"
  21 #include "sysemu/kvm.h"
  22 #include "kvm_ppc.h"
  23 #include "sysemu/device_tree.h"
  24 #include "sysemu/block-backend.h"
  25 #include "hw/loader.h"
  26 #include "elf.h"
  27 #include "exec/address-spaces.h"
  28 #include "exec/memory.h"
  29 #include "ppc440.h"
  30 #include "ppc405.h"
  31 #include "hw/block/flash.h"
  32 #include "sysemu/sysemu.h"
  33 #include "sysemu/qtest.h"
  34 #include "hw/sysbus.h"
  35 #include "hw/char/serial.h"
  36 #include "hw/i2c/ppc4xx_i2c.h"
  37 #include "hw/i2c/smbus.h"
  38 #include "hw/usb/hcd-ehci.h"
  39 #include "hw/ppc/fdt.h"
  40
  41 #include <libfdt.h>
  42
  43 #define BINARY_DEVICE_TREE_FILE "canyonlands.dtb"
  44 #define UBOOT_FILENAME "u-boot-sam460-20100605.bin"
  45 /* to extract the official U-Boot bin from the updater: */
  46 /* dd bs=1 skip=$(($(stat -c '%s' updater/updater-460) - 0x80000)) \
  47      if=updater/updater-460 of=u-boot-sam460-20100605.bin */
  48
  49 /* from Sam460 U-Boot include/configs/Sam460ex.h */
  50 #define FLASH_BASE             0xfff00000
  51 #define FLASH_BASE_H           0x4
  52 #define FLASH_SIZE             (1 * MiB)
  53 #define UBOOT_LOAD_BASE        0xfff80000
  54 #define UBOOT_SIZE             0x00080000
  55 #define UBOOT_ENTRY            0xfffffffc
  56
  57 /* from U-Boot */
  58 #define EPAPR_MAGIC           (0x45504150)
  59 #define KERNEL_ADDR           0x1000000
  60 #define FDT_ADDR              0x1800000
  61 #define RAMDISK_ADDR          0x1900000
  62
  63 /* Sam460ex IRQ MAP:
  64    IRQ0  = ETH_INT
  65    IRQ1  = FPGA_INT
  66    IRQ2  = PCI_INT (PCIA, PCIB, PCIC, PCIB)
  67    IRQ3  = FPGA_INT2
  68    IRQ11 = RTC_INT
  69    IRQ12 = SM502_INT
  70 */
  71
  72 #define CPU_FREQ 1150000000
  73 #define PLB_FREQ 230000000
  74 #define OPB_FREQ 115000000
  75 #define EBC_FREQ 115000000
  76 #define UART_FREQ 11059200
  77 #define SDRAM_NR_BANKS 4
  78
  79 /* FIXME: See u-boot.git 8ac41e, also fix in ppc440_uc.c */
  80 static const unsigned int ppc460ex_sdram_bank_sizes[] = {
  81     1 * GiB, 512 * MiB, 256 * MiB, 128 * MiB, 64 * MiB, 32 * MiB, 0
  82 };
  83
  84 struct boot_info {
  85     uint32_t dt_base;
  86     uint32_t dt_size;
  87     uint32_t entry;
  88 };
  89
  90 /*****************************************************************************/
  91 /* SPD eeprom content from mips_malta.c */
  92
  93 struct _eeprom24c0x_t {
  94   uint8_t tick;
  95   uint8_t address;
  96   uint8_t command;
  97   uint8_t ack;
  98   uint8_t scl;
  99   uint8_t sda;
 100   uint8_t data;
 101   uint8_t contents[256];
 102 };
 103
 104 typedef struct _eeprom24c0x_t eeprom24c0x_t;
 105
 106 static eeprom24c0x_t spd_eeprom = {
 107     .contents = {
 108         /* 00000000: */ 0x80, 0x08, 0xFF, 0x0D, 0x0A, 0xFF, 0x40, 0x00,
 109         /* 00000008: */ 0x04, 0x75, 0x54, 0x00, 0x82, 0x08, 0x00, 0x01,
 110         /* 00000010: */ 0x8F, 0x04, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00,
 111         /* 00000018: */ 0x00, 0x00, 0x00, 0x14, 0x0F, 0x14, 0x2D, 0xFF,
 112         /* 00000020: */ 0x15, 0x08, 0x15, 0x08, 0x00, 0x00, 0x00, 0x00,
 113         /* 00000028: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 114         /* 00000030: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 115         /* 00000038: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0xD0,
 116         /* 00000040: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 117         /* 00000048: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 118         /* 00000050: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 119         /* 00000058: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 120         /* 00000060: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 121         /* 00000068: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 122         /* 00000070: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 123         /* 00000078: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x64, 0xF4,
 124     },
 125 };
 126
 127 static void generate_eeprom_spd(uint8_t *eeprom, ram_addr_t ram_size)
 128 {
 129     enum { SDR = 0x4, DDR1 = 0x7, DDR2 = 0x8 } type;
 130     uint8_t *spd = spd_eeprom.contents;
 131     uint8_t nbanks = 0;
 132     uint16_t density = 0;
 133     int i;
 134
 135     /* work in terms of MB */
 136     ram_size /= MiB;
 137
 138     while ((ram_size >= 4) && (nbanks <= 2)) {
 139         int sz_log2 = MIN(31 - clz32(ram_size), 14);
 140         nbanks++;
 141         density |= 1 << (sz_log2 - 2);
 142         ram_size -= 1 << sz_log2;
 143     }
 144
 145     /* split to 2 banks if possible */
 146     if ((nbanks == 1) && (density > 1)) {
 147         nbanks++;
 148         density >>= 1;
 149     }
 150
 151     if (density & 0xff00) {
 152         density = (density & 0xe0) | ((density >> 8) & 0x1f);
 153         type = DDR2;
 154     } else if (!(density & 0x1f)) {
 155         type = DDR2;
 156     } else {
 157         type = SDR;
 158     }
 159
 160     if (ram_size) {
 161         warn_report("SPD cannot represent final " RAM_ADDR_FMT "MB"
 162                     " of SDRAM", ram_size);
 163     }
 164
 165     /* fill in SPD memory information */
 166     spd[2] = type;
 167     spd[5] = nbanks;
 168     spd[31] = density;
 169
 170     /* XXX: this is totally random */
 171     spd[9] = 0x10; /* CAS tcyc */
 172     spd[18] = 0x20; /* CAS bit */
 173     spd[23] = 0x10; /* CAS tcyc */
 174     spd[25] = 0x10; /* CAS tcyc */
 175
 176     /* checksum */
 177     spd[63] = 0;
 178     for (i = 0; i < 63; i++) {
 179         spd[63] += spd[i];
 180     }
 181
 182     /* copy for SMBUS */
 183     memcpy(eeprom, spd, sizeof(spd_eeprom.contents));
 184 }
 185
 186 static void generate_eeprom_serial(uint8_t *eeprom)
 187 {
 188     int i, pos = 0;
 189     uint8_t mac[6] = { 0x00 };
 190     uint8_t sn[5] = { 0x01, 0x23, 0x45, 0x67, 0x89 };
 191
 192     /* version */
 193     eeprom[pos++] = 0x01;
 194
 195     /* count */
 196     eeprom[pos++] = 0x02;
 197
 198     /* MAC address */
 199     eeprom[pos++] = 0x01; /* MAC */
 200     eeprom[pos++] = 0x06; /* length */
 201     memcpy(&eeprom[pos], mac, sizeof(mac));
 202     pos += sizeof(mac);
 203
 204     /* serial number */
 205     eeprom[pos++] = 0x02; /* serial */
 206     eeprom[pos++] = 0x05; /* length */
 207     memcpy(&eeprom[pos], sn, sizeof(sn));
 208     pos += sizeof(sn);
 209
 210     /* checksum */
 211     eeprom[pos] = 0;
 212     for (i = 0; i < pos; i++) {
 213         eeprom[pos] += eeprom[i];
 214     }
 215 }
 216
 217 /*****************************************************************************/
 218
 219 static int sam460ex_load_uboot(void)
 220 {
 221     DriveInfo *dinfo;
 222     BlockBackend *blk = NULL;
 223     hwaddr base = FLASH_BASE | ((hwaddr)FLASH_BASE_H << 32);
 224     long bios_size = FLASH_SIZE;
 225     int fl_sectors;
 226
 227     dinfo = drive_get(IF_PFLASH, 0, 0);
 228     if (dinfo) {
 229         blk = blk_by_legacy_dinfo(dinfo);
 230         bios_size = blk_getlength(blk);
 231     }
 232     fl_sectors = (bios_size + 65535) >> 16;
 233
 234     if (!pflash_cfi01_register(base, NULL, "sam460ex.flash", bios_size,
 235                                blk, 64 * KiB, fl_sectors,
 236                                1, 0x89, 0x18, 0x0000, 0x0, 1)) {
 237         error_report("qemu: Error registering flash memory.");
 238         /* XXX: return an error instead? */
 239         exit(1);
 240     }
 241
 242     if (!blk) {
 243         /*error_report("No flash image given with the 'pflash' parameter,"
 244                 " using default u-boot image");*/
 245         base = UBOOT_LOAD_BASE | ((hwaddr)FLASH_BASE_H << 32);
 246         rom_add_file_fixed(UBOOT_FILENAME, base, -1);
 247     }
 248
 249     return 0;
 250 }
 251
 252 static int sam460ex_load_device_tree(hwaddr addr,
 253                                      uint32_t ramsize,
 254                                      hwaddr initrd_base,
 255                                      hwaddr initrd_size,
 256                                      const char *kernel_cmdline)
 257 {
 258     uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(ramsize) };
 259     char *filename;
 260     int fdt_size;
 261     void *fdt;
 262     uint32_t tb_freq = CPU_FREQ;
 263     uint32_t clock_freq = CPU_FREQ;
 264     int offset;
 265
 266     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 267     if (!filename) {
 268         error_report("Couldn't find dtb file `%s'", BINARY_DEVICE_TREE_FILE);
 269         exit(1);
 270     }
 271     fdt = load_device_tree(filename, &fdt_size);
 272     if (!fdt) {
 273         error_report("Couldn't load dtb file `%s'", filename);
 274         g_free(filename);
 275         exit(1);
 276     }
 277     g_free(filename);
 278
 279     /* Manipulate device tree in memory. */
 280
 281     qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property,
 282                      sizeof(mem_reg_property));
 283
 284     /* default FDT doesn't have a /chosen node... */
 285     qemu_fdt_add_subnode(fdt, "/chosen");
 286
 287     qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", initrd_base);
 288
 289     qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
 290                           (initrd_base + initrd_size));
 291
 292     qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 293
 294     /* Copy data from the host device tree into the guest. Since the guest can
 295      * directly access the timebase without host involvement, we must expose
 296      * the correct frequencies. */
 297     if (kvm_enabled()) {
 298         tb_freq = kvmppc_get_tbfreq();
 299         clock_freq = kvmppc_get_clockfreq();
 300     }
 301
 302     qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
 303                               clock_freq);
 304     qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
 305                               tb_freq);
 306
 307     /* Remove cpm node if it exists (it is not emulated) */
 308     offset = fdt_path_offset(fdt, "/cpm");
 309     if (offset >= 0) {
 310         _FDT(fdt_nop_node(fdt, offset));
 311     }
 312
 313     /* set serial port clocks */
 314     offset = fdt_node_offset_by_compatible(fdt, -1, "ns16550");
 315     while (offset >= 0) {
 316         _FDT(fdt_setprop_cell(fdt, offset, "clock-frequency", UART_FREQ));
 317         offset = fdt_node_offset_by_compatible(fdt, offset, "ns16550");
 318     }
 319
 320     /* some more clocks */
 321     qemu_fdt_setprop_cell(fdt, "/plb", "clock-frequency",
 322                               PLB_FREQ);
 323     qemu_fdt_setprop_cell(fdt, "/plb/opb", "clock-frequency",
 324                               OPB_FREQ);
 325     qemu_fdt_setprop_cell(fdt, "/plb/opb/ebc", "clock-frequency",
 326                               EBC_FREQ);
 327
 328     rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
 329     g_free(fdt);
 330
 331     return fdt_size;
 332 }
 333
 334 /* Create reset TLB entries for BookE, mapping only the flash memory.  */
 335 static void mmubooke_create_initial_mapping_uboot(CPUPPCState *env)
 336 {
 337     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
 338
 339     /* on reset the flash is mapped by a shadow TLB,
 340      * but since we don't implement them we need to use
 341      * the same values U-Boot will use to avoid a fault.
 342      */
 343     tlb->attr = 0;
 344     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 345     tlb->size = 0x10000000; /* up to 0xffffffff  */
 346     tlb->EPN = 0xf0000000 & TARGET_PAGE_MASK;
 347     tlb->RPN = (0xf0000000 & TARGET_PAGE_MASK) | 0x4;
 348     tlb->PID = 0;
 349 }
 350
 351 /* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
 352 static void mmubooke_create_initial_mapping(CPUPPCState *env,
 353                                      target_ulong va,
 354                                      hwaddr pa)
 355 {
 356     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
 357
 358     tlb->attr = 0;
 359     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 360     tlb->size = 1 << 31; /* up to 0x80000000  */
 361     tlb->EPN = va & TARGET_PAGE_MASK;
 362     tlb->RPN = pa & TARGET_PAGE_MASK;
 363     tlb->PID = 0;
 364 }
 365
 366 static void main_cpu_reset(void *opaque)
 367 {
 368     PowerPCCPU *cpu = opaque;
 369     CPUPPCState *env = &cpu->env;
 370     struct boot_info *bi = env->load_info;
 371
 372     cpu_reset(CPU(cpu));
 373
 374     /* either we have a kernel to boot or we jump to U-Boot */
 375     if (bi->entry != UBOOT_ENTRY) {
 376         env->gpr[1] = (16 * MiB) - 8;
 377         env->gpr[3] = FDT_ADDR;
 378         env->nip = bi->entry;
 379
 380         /* Create a mapping for the kernel.  */
 381         mmubooke_create_initial_mapping(env, 0, 0);
 382         env->gpr[6] = tswap32(EPAPR_MAGIC);
 383         env->gpr[7] = (16 * MiB) - 8; /* bi->ima_size; */
 384
 385     } else {
 386         env->nip = UBOOT_ENTRY;
 387         mmubooke_create_initial_mapping_uboot(env);
 388     }
 389 }
 390
 391 static void sam460ex_init(MachineState *machine)
 392 {
 393     MemoryRegion *address_space_mem = get_system_memory();
 394     MemoryRegion *isa = g_new(MemoryRegion, 1);
 395     MemoryRegion *ram_memories = g_new(MemoryRegion, SDRAM_NR_BANKS);
 396     hwaddr ram_bases[SDRAM_NR_BANKS];
 397     hwaddr ram_sizes[SDRAM_NR_BANKS];
 398     MemoryRegion *l2cache_ram = g_new(MemoryRegion, 1);
 399     qemu_irq *irqs, *uic[4];
 400     PCIBus *pci_bus;
 401     PowerPCCPU *cpu;
 402     CPUPPCState *env;
 403     PPC4xxI2CState *i2c[2];
 404     hwaddr entry = UBOOT_ENTRY;
 405     hwaddr loadaddr = 0;
 406     target_long initrd_size = 0;
 407     DeviceState *dev;
 408     SysBusDevice *sbdev;
 409     int success;
 410     int i;
 411     struct boot_info *boot_info;
 412     const size_t smbus_eeprom_size = 8 * 256;
 413     uint8_t *smbus_eeprom_buf = g_malloc0(smbus_eeprom_size);
 414
 415     cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
 416     env = &cpu->env;
 417     if (env->mmu_model != POWERPC_MMU_BOOKE) {
 418         error_report("Only MMU model BookE is supported by this machine.");
 419         exit(1);
 420     }
 421
 422 #ifdef TARGET_PPCEMB
 423     if (!qtest_enabled()) {
 424         warn_report("qemu-system-ppcemb is deprecated, "
 425                     "please use qemu-system-ppc instead.");
 426     }
 427 #endif
 428
 429     qemu_register_reset(main_cpu_reset, cpu);
 430     boot_info = g_malloc0(sizeof(*boot_info));
 431     env->load_info = boot_info;
 432
 433     ppc_booke_timers_init(cpu, CPU_FREQ, 0);
 434     ppc_dcr_init(env, NULL, NULL);
 435
 436     /* PLB arbitrer */
 437     ppc4xx_plb_init(env);
 438
 439     /* interrupt controllers */
 440     irqs = g_malloc0(sizeof(*irqs) * PPCUIC_OUTPUT_NB);
 441     irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 442     irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 443     uic[0] = ppcuic_init(env, irqs, 0xc0, 0, 1);
 444     uic[1] = ppcuic_init(env, &uic[0][30], 0xd0, 0, 1);
 445     uic[2] = ppcuic_init(env, &uic[0][10], 0xe0, 0, 1);
 446     uic[3] = ppcuic_init(env, &uic[0][16], 0xf0, 0, 1);
 447
 448     /* SDRAM controller */
 449     memset(ram_bases, 0, sizeof(ram_bases));
 450     memset(ram_sizes, 0, sizeof(ram_sizes));
 451     /* put all RAM on first bank because board has one slot
 452      * and firmware only checks that */
 453     machine->ram_size = ppc4xx_sdram_adjust(machine->ram_size, 1,
 454                                    ram_memories, ram_bases, ram_sizes,
 455                                    ppc460ex_sdram_bank_sizes);
 456
 457     /* FIXME: does 460EX have ECC interrupts? */
 458     ppc440_sdram_init(env, SDRAM_NR_BANKS, ram_memories,
 459                       ram_bases, ram_sizes, 1);
 460
 461     /* generate SPD EEPROM data */
 462     for (i = 0; i < SDRAM_NR_BANKS; i++) {
 463         generate_eeprom_spd(&smbus_eeprom_buf[i * 256], ram_sizes[i]);
 464     }
 465     generate_eeprom_serial(&smbus_eeprom_buf[4 * 256]);
 466     generate_eeprom_serial(&smbus_eeprom_buf[6 * 256]);
 467
 468     /* IIC controllers */
 469     dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600700, uic[0][2]);
 470     i2c[0] = PPC4xx_I2C(dev);
 471     object_property_set_bool(OBJECT(dev), true, "realized", NULL);
 472     smbus_eeprom_init(i2c[0]->bus, 8, smbus_eeprom_buf, smbus_eeprom_size);
 473     g_free(smbus_eeprom_buf);
 474     i2c_create_slave(i2c[0]->bus, "m41t80", 0x68);
 475
 476     dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600800, uic[0][3]);
 477     i2c[1] = PPC4xx_I2C(dev);
 478
 479     /* External bus controller */
 480     ppc405_ebc_init(env);
 481
 482     /* CPR */
 483     ppc4xx_cpr_init(env);
 484
 485     /* PLB to AHB bridge */
 486     ppc4xx_ahb_init(env);
 487
 488     /* System DCRs */
 489     ppc4xx_sdr_init(env);
 490
 491     /* MAL */
 492     ppc4xx_mal_init(env, 4, 16, &uic[2][3]);
 493
 494     /* DMA */
 495     ppc4xx_dma_init(env, 0x200);
 496
 497     /* 256K of L2 cache as memory */
 498     ppc4xx_l2sram_init(env);
 499     /* FIXME: remove this after fixing l2sram mapping in ppc440_uc.c? */
 500     memory_region_init_ram(l2cache_ram, NULL, "ppc440.l2cache_ram", 256 * KiB,
 501                            &error_abort);
 502     memory_region_add_subregion(address_space_mem, 0x400000000LL, l2cache_ram);
 503
 504     /* USB */
 505     sysbus_create_simple(TYPE_PPC4xx_EHCI, 0x4bffd0400, uic[2][29]);
 506     dev = qdev_create(NULL, "sysbus-ohci");
 507     qdev_prop_set_string(dev, "masterbus", "usb-bus.0");
 508     qdev_prop_set_uint32(dev, "num-ports", 6);
 509     qdev_init_nofail(dev);
 510     sbdev = SYS_BUS_DEVICE(dev);
 511     sysbus_mmio_map(sbdev, 0, 0x4bffd0000);
 512     sysbus_connect_irq(sbdev, 0, uic[2][30]);
 513     usb_create_simple(usb_bus_find(-1), "usb-kbd");
 514     usb_create_simple(usb_bus_find(-1), "usb-mouse");
 515
 516     /* PCI bus */
 517     ppc460ex_pcie_init(env);
 518     /* All PCI irqs are connected to the same UIC pin (cf. UBoot source) */
 519     dev = sysbus_create_simple("ppc440-pcix-host", 0xc0ec00000, uic[1][0]);
 520     pci_bus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
 521     if (!pci_bus) {
 522         error_report("couldn't create PCI controller!");
 523         exit(1);
 524     }
 525     memory_region_init_alias(isa, NULL, "isa_mmio", get_system_io(),
 526                              0, 0x10000);
 527     memory_region_add_subregion(get_system_memory(), 0xc08000000, isa);
 528
 529     /* PCI devices */
 530     pci_create_simple(pci_bus, PCI_DEVFN(6, 0), "sm501");
 531     /* SoC has a single SATA port but we don't emulate that yet
 532      * However, firmware and usual clients have driver for SiI311x
 533      * so add one for convenience by default */
 534     if (defaults_enabled()) {
 535         pci_create_simple(pci_bus, -1, "sii3112");
 536     }
 537
 538     /* SoC has 4 UARTs
 539      * but board has only one wired and two are present in fdt */
 540     if (serial_hd(0) != NULL) {
 541         serial_mm_init(address_space_mem, 0x4ef600300, 0, uic[1][1],
 542                        PPC_SERIAL_MM_BAUDBASE, serial_hd(0),
 543                        DEVICE_BIG_ENDIAN);
 544     }
 545     if (serial_hd(1) != NULL) {
 546         serial_mm_init(address_space_mem, 0x4ef600400, 0, uic[0][1],
 547                        PPC_SERIAL_MM_BAUDBASE, serial_hd(1),
 548                        DEVICE_BIG_ENDIAN);
 549     }
 550
 551     /* Load U-Boot image. */
 552     if (!machine->kernel_filename) {
 553         success = sam460ex_load_uboot();
 554         if (success < 0) {
 555             error_report("qemu: could not load firmware");
 556             exit(1);
 557         }
 558     }
 559
 560     /* Load kernel. */
 561     if (machine->kernel_filename) {
 562         success = load_uimage(machine->kernel_filename, &entry, &loadaddr,
 563                               NULL, NULL, NULL);
 564         if (success < 0) {
 565             uint64_t elf_entry, elf_lowaddr;
 566
 567             success = load_elf(machine->kernel_filename, NULL, NULL, &elf_entry,
 568                                &elf_lowaddr, NULL, 1, PPC_ELF_MACHINE, 0, 0);
 569             entry = elf_entry;
 570             loadaddr = elf_lowaddr;
 571         }
 572         /* XXX try again as binary */
 573         if (success < 0) {
 574             error_report("qemu: could not load kernel '%s'",
 575                     machine->kernel_filename);
 576             exit(1);
 577         }
 578     }
 579
 580     /* Load initrd. */
 581     if (machine->initrd_filename) {
 582         initrd_size = load_image_targphys(machine->initrd_filename,
 583                                           RAMDISK_ADDR,
 584                                           machine->ram_size - RAMDISK_ADDR);
 585         if (initrd_size < 0) {
 586             error_report("qemu: could not load ram disk '%s' at %x",
 587                     machine->initrd_filename, RAMDISK_ADDR);
 588             exit(1);
 589         }
 590     }
 591
 592     /* If we're loading a kernel directly, we must load the device tree too. */
 593     if (machine->kernel_filename) {
 594         int dt_size;
 595
 596         dt_size = sam460ex_load_device_tree(FDT_ADDR, machine->ram_size,
 597                                     RAMDISK_ADDR, initrd_size,
 598                                     machine->kernel_cmdline);
 599
 600         boot_info->dt_base = FDT_ADDR;
 601         boot_info->dt_size = dt_size;
 602     }
 603
 604     boot_info->entry = entry;
 605 }
 606
 607 static void sam460ex_machine_init(MachineClass *mc)
 608 {
 609     mc->desc = "aCube Sam460ex";
 610     mc->init = sam460ex_init;
 611     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("460exb");
 612     mc->default_ram_size = 512 * MiB;
 613 }
 614
 615 DEFINE_MACHINE("sam460ex", sam460ex_machine_init)