hw/mips_malta.c

   1 /*
   2  * QEMU Malta board support
   3  *
   4  * Copyright (c) 2006 Aurelien Jarno
   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
  25 #include "vl.h"
  26
  27 #ifdef TARGET_WORDS_BIGENDIAN
  28 #define BIOS_FILENAME "mips_bios.bin"
  29 #else
  30 #define BIOS_FILENAME "mipsel_bios.bin"
  31 #endif
  32
  33 #ifdef TARGET_MIPS64
  34 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
  35 #else
  36 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffU)
  37 #endif
  38
  39 #define ENVP_ADDR (int32_t)0x80002000
  40 #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
  41
  42 #define ENVP_NB_ENTRIES         16
  43 #define ENVP_ENTRY_SIZE         256
  44
  45
  46 extern FILE *logfile;
  47
  48 typedef struct {
  49     uint32_t leds;
  50     uint32_t brk;
  51     uint32_t gpout;
  52     uint32_t i2cin;
  53     uint32_t i2coe;
  54     uint32_t i2cout;
  55     uint32_t i2csel;
  56     CharDriverState *display;
  57     char display_text[9];
  58     SerialState *uart;
  59 } MaltaFPGAState;
  60
  61 static PITState *pit;
  62
  63 /* Malta FPGA */
  64 static void malta_fpga_update_display(void *opaque)
  65 {
  66     char leds_text[9];
  67     int i;
  68     MaltaFPGAState *s = opaque;
  69
  70     for (i = 7 ; i >= 0 ; i--) {
  71         if (s->leds & (1 << i))
  72             leds_text[i] = '#';
  73         else
  74             leds_text[i] = ' ';
  75     }
  76     leds_text[8] = '\0';
  77
  78     qemu_chr_printf(s->display, "\e[H\n\n|\e[32m%-8.8s\e[00m|\r\n", leds_text);
  79     qemu_chr_printf(s->display, "\n\n\n\n|\e[31m%-8.8s\e[00m|", s->display_text);
  80 }
  81
  82 /*
  83  * EEPROM 24C01 / 24C02 emulation.
  84  *
  85  * Emulation for serial EEPROMs:
  86  * 24C01 - 1024 bit (128 x 8)
  87  * 24C02 - 2048 bit (256 x 8)
  88  *
  89  * Typical device names include Microchip 24C02SC or SGS Thomson ST24C02.
  90  */
  91
  92 //~ #define DEBUG
  93
  94 #if defined(DEBUG)
  95 #  define logout(fmt, args...) fprintf(stderr, "MALTA\t%-24s" fmt, __func__, ##args)
  96 #else
  97 #  define logout(fmt, args...) ((void)0)
  98 #endif
  99
 100 struct _eeprom24c0x_t {
 101   uint8_t tick;
 102   uint8_t address;
 103   uint8_t command;
 104   uint8_t ack;
 105   uint8_t scl;
 106   uint8_t sda;
 107   uint8_t data;
 108   //~ uint16_t size;
 109   uint8_t contents[256];
 110 };
 111
 112 typedef struct _eeprom24c0x_t eeprom24c0x_t;
 113
 114 static eeprom24c0x_t eeprom = {
 115     contents: {
 116         /* 00000000: */ 0x80,0x08,0x04,0x0D,0x0A,0x01,0x40,0x00,
 117         /* 00000008: */ 0x01,0x75,0x54,0x00,0x82,0x08,0x00,0x01,
 118         /* 00000010: */ 0x8F,0x04,0x02,0x01,0x01,0x00,0x0E,0x00,
 119         /* 00000018: */ 0x00,0x00,0x00,0x14,0x0F,0x14,0x2D,0x40,
 120         /* 00000020: */ 0x15,0x08,0x15,0x08,0x00,0x00,0x00,0x00,
 121         /* 00000028: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 122         /* 00000030: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 123         /* 00000038: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x12,0xD0,
 124         /* 00000040: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 125         /* 00000048: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 126         /* 00000050: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 127         /* 00000058: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 128         /* 00000060: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 129         /* 00000068: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 130         /* 00000070: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 131         /* 00000078: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x64,0xF4,
 132     },
 133 };
 134
 135 static uint8_t eeprom24c0x_read()
 136 {
 137     logout("%u: scl = %u, sda = %u, data = 0x%02x\n",
 138         eeprom.tick, eeprom.scl, eeprom.sda, eeprom.data);
 139     return eeprom.sda;
 140 }
 141
 142 static void eeprom24c0x_write(int scl, int sda)
 143 {
 144     if (eeprom.scl && scl && (eeprom.sda != sda)) {
 145         logout("%u: scl = %u->%u, sda = %u->%u i2c %s\n",
 146                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda, sda ? "stop" : "start");
 147         if (!sda) {
 148             eeprom.tick = 1;
 149             eeprom.command = 0;
 150         }
 151     } else if (eeprom.tick == 0 && !eeprom.ack) {
 152         /* Waiting for start. */
 153         logout("%u: scl = %u->%u, sda = %u->%u wait for i2c start\n",
 154                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 155     } else if (!eeprom.scl && scl) {
 156         logout("%u: scl = %u->%u, sda = %u->%u trigger bit\n",
 157                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 158         if (eeprom.ack) {
 159             logout("\ti2c ack bit = 0\n");
 160             sda = 0;
 161             eeprom.ack = 0;
 162         } else if (eeprom.sda == sda) {
 163             uint8_t bit = (sda != 0);
 164             logout("\ti2c bit = %d\n", bit);
 165             if (eeprom.tick < 9) {
 166                 eeprom.command <<= 1;
 167                 eeprom.command += bit;
 168                 eeprom.tick++;
 169                 if (eeprom.tick == 9) {
 170                     logout("\tcommand 0x%04x, %s\n", eeprom.command, bit ? "read" : "write");
 171                     eeprom.ack = 1;
 172                 }
 173             } else if (eeprom.tick < 17) {
 174                 if (eeprom.command & 1) {
 175                     sda = ((eeprom.data & 0x80) != 0);
 176                 }
 177                 eeprom.address <<= 1;
 178                 eeprom.address += bit;
 179                 eeprom.tick++;
 180                 eeprom.data <<= 1;
 181                 if (eeprom.tick == 17) {
 182                     eeprom.data = eeprom.contents[eeprom.address];
 183                     logout("\taddress 0x%04x, data 0x%02x\n", eeprom.address, eeprom.data);
 184                     eeprom.ack = 1;
 185                     eeprom.tick = 0;
 186                 }
 187             } else if (eeprom.tick >= 17) {
 188                 sda = 0;
 189             }
 190         } else {
 191             logout("\tsda changed with raising scl\n");
 192         }
 193     } else {
 194         logout("%u: scl = %u->%u, sda = %u->%u\n", eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 195     }
 196     eeprom.scl = scl;
 197     eeprom.sda = sda;
 198 }
 199
 200 static uint32_t malta_fpga_readl(void *opaque, target_phys_addr_t addr)
 201 {
 202     MaltaFPGAState *s = opaque;
 203     uint32_t val = 0;
 204     uint32_t saddr;
 205
 206     saddr = (addr & 0xfffff);
 207
 208     switch (saddr) {
 209
 210     /* SWITCH Register */
 211     case 0x00200:
 212         val = 0x00000000;               /* All switches closed */
 213         break;
 214
 215     /* STATUS Register */
 216     case 0x00208:
 217 #ifdef TARGET_WORDS_BIGENDIAN
 218         val = 0x00000012;
 219 #else
 220         val = 0x00000010;
 221 #endif
 222         break;
 223
 224     /* JMPRS Register */
 225     case 0x00210:
 226         val = 0x00;
 227         break;
 228
 229     /* LEDBAR Register */
 230     case 0x00408:
 231         val = s->leds;
 232         break;
 233
 234     /* BRKRES Register */
 235     case 0x00508:
 236         val = s->brk;
 237         break;
 238
 239     /* UART Registers */
 240     case 0x00900:
 241     case 0x00908:
 242     case 0x00910:
 243     case 0x00918:
 244     case 0x00920:
 245     case 0x00928:
 246     case 0x00930:
 247     case 0x00938:
 248         val = serial_mm_readb(s->uart, addr);
 249         break;
 250
 251     /* GPOUT Register */
 252     case 0x00a00:
 253         val = s->gpout;
 254         break;
 255
 256     /* XXX: implement a real I2C controller */
 257
 258     /* GPINP Register */
 259     case 0x00a08:
 260         /* IN = OUT until a real I2C control is implemented */
 261         if (s->i2csel)
 262             val = s->i2cout;
 263         else
 264             val = 0x00;
 265         break;
 266
 267     /* I2CINP Register */
 268     case 0x00b00:
 269         val = ((s->i2cin & ~1) | eeprom24c0x_read());
 270         break;
 271
 272     /* I2COE Register */
 273     case 0x00b08:
 274         val = s->i2coe;
 275         break;
 276
 277     /* I2COUT Register */
 278     case 0x00b10:
 279         val = s->i2cout;
 280         break;
 281
 282     /* I2CSEL Register */
 283     case 0x00b18:
 284         val = s->i2csel;
 285         break;
 286
 287     default:
 288 #if 0
 289         printf ("malta_fpga_read: Bad register offset 0x" TARGET_FMT_lx "\n",
 290                 addr);
 291 #endif
 292         break;
 293     }
 294     return val;
 295 }
 296
 297 static void malta_fpga_writel(void *opaque, target_phys_addr_t addr,
 298                               uint32_t val)
 299 {
 300     MaltaFPGAState *s = opaque;
 301     uint32_t saddr;
 302
 303     saddr = (addr & 0xfffff);
 304
 305     switch (saddr) {
 306
 307     /* SWITCH Register */
 308     case 0x00200:
 309         break;
 310
 311     /* JMPRS Register */
 312     case 0x00210:
 313         break;
 314
 315     /* LEDBAR Register */
 316     /* XXX: implement a 8-LED array */
 317     case 0x00408:
 318         s->leds = val & 0xff;
 319         break;
 320
 321     /* ASCIIWORD Register */
 322     case 0x00410:
 323         snprintf(s->display_text, 9, "%08X", val);
 324         malta_fpga_update_display(s);
 325         break;
 326
 327     /* ASCIIPOS0 to ASCIIPOS7 Registers */
 328     case 0x00418:
 329     case 0x00420:
 330     case 0x00428:
 331     case 0x00430:
 332     case 0x00438:
 333     case 0x00440:
 334     case 0x00448:
 335     case 0x00450:
 336         s->display_text[(saddr - 0x00418) >> 3] = (char) val;
 337         malta_fpga_update_display(s);
 338         break;
 339
 340     /* SOFTRES Register */
 341     case 0x00500:
 342         if (val == 0x42)
 343             qemu_system_reset_request ();
 344         break;
 345
 346     /* BRKRES Register */
 347     case 0x00508:
 348         s->brk = val & 0xff;
 349         break;
 350
 351     /* UART Registers */
 352     case 0x00900:
 353     case 0x00908:
 354     case 0x00910:
 355     case 0x00918:
 356     case 0x00920:
 357     case 0x00928:
 358     case 0x00930:
 359     case 0x00938:
 360         serial_mm_writeb(s->uart, addr, val);
 361         break;
 362
 363     /* GPOUT Register */
 364     case 0x00a00:
 365         s->gpout = val & 0xff;
 366         break;
 367
 368     /* I2COE Register */
 369     case 0x00b08:
 370         s->i2coe = val & 0x03;
 371         break;
 372
 373     /* I2COUT Register */
 374     case 0x00b10:
 375         eeprom24c0x_write(val & 0x02, val & 0x01);
 376         s->i2cout = val;
 377         break;
 378
 379     /* I2CSEL Register */
 380     case 0x00b18:
 381         s->i2csel = val & 0x01;
 382         break;
 383
 384     default:
 385 #if 0
 386         printf ("malta_fpga_write: Bad register offset 0x" TARGET_FMT_lx "\n",
 387                 addr);
 388 #endif
 389         break;
 390     }
 391 }
 392
 393 static CPUReadMemoryFunc *malta_fpga_read[] = {
 394    malta_fpga_readl,
 395    malta_fpga_readl,
 396    malta_fpga_readl
 397 };
 398
 399 static CPUWriteMemoryFunc *malta_fpga_write[] = {
 400    malta_fpga_writel,
 401    malta_fpga_writel,
 402    malta_fpga_writel
 403 };
 404
 405 void malta_fpga_reset(void *opaque)
 406 {
 407     MaltaFPGAState *s = opaque;
 408
 409     s->leds   = 0x00;
 410     s->brk    = 0x0a;
 411     s->gpout  = 0x00;
 412     s->i2cin  = 0x3;
 413     s->i2coe  = 0x0;
 414     s->i2cout = 0x3;
 415     s->i2csel = 0x1;
 416
 417     s->display_text[8] = '\0';
 418     snprintf(s->display_text, 9, "        ");
 419     malta_fpga_update_display(s);
 420 }
 421
 422 MaltaFPGAState *malta_fpga_init(target_phys_addr_t base, CPUState *env)
 423 {
 424     MaltaFPGAState *s;
 425     CharDriverState *uart_chr;
 426     int malta;
 427
 428     s = (MaltaFPGAState *)qemu_mallocz(sizeof(MaltaFPGAState));
 429
 430     malta = cpu_register_io_memory(0, malta_fpga_read,
 431                                    malta_fpga_write, s);
 432
 433     cpu_register_physical_memory(base, 0x100000, malta);
 434
 435     s->display = qemu_chr_open("vc");
 436     qemu_chr_printf(s->display, "\e[HMalta LEDBAR\r\n");
 437     qemu_chr_printf(s->display, "+--------+\r\n");
 438     qemu_chr_printf(s->display, "+        +\r\n");
 439     qemu_chr_printf(s->display, "+--------+\r\n");
 440     qemu_chr_printf(s->display, "\n");
 441     qemu_chr_printf(s->display, "Malta ASCII\r\n");
 442     qemu_chr_printf(s->display, "+--------+\r\n");
 443     qemu_chr_printf(s->display, "+        +\r\n");
 444     qemu_chr_printf(s->display, "+--------+\r\n");
 445
 446     uart_chr = qemu_chr_open("vc");
 447     qemu_chr_printf(uart_chr, "CBUS UART\r\n");
 448     s->uart = serial_mm_init(base, 3, env->irq[2], uart_chr, 0);
 449
 450     malta_fpga_reset(s);
 451     qemu_register_reset(malta_fpga_reset, s);
 452
 453     return s;
 454 }
 455
 456 /* Audio support */
 457 #ifdef HAS_AUDIO
 458 static void audio_init (PCIBus *pci_bus)
 459 {
 460     struct soundhw *c;
 461     int audio_enabled = 0;
 462
 463     for (c = soundhw; !audio_enabled && c->name; ++c) {
 464         audio_enabled = c->enabled;
 465     }
 466
 467     if (audio_enabled) {
 468         AudioState *s;
 469
 470         s = AUD_init ();
 471         if (s) {
 472             for (c = soundhw; c->name; ++c) {
 473                 if (c->enabled) {
 474                     if (c->isa) {
 475                         fprintf(stderr, "qemu: Unsupported Sound Card: %s\n", c->name);
 476                         exit(1);
 477                     }
 478                     else {
 479                         if (pci_bus) {
 480                             c->init.init_pci (pci_bus, s);
 481                         }
 482                     }
 483                 }
 484             }
 485         }
 486     }
 487 }
 488 #endif
 489
 490 /* Network support */
 491 static void network_init (PCIBus *pci_bus)
 492 {
 493     int i;
 494     NICInfo *nd;
 495
 496     for(i = 0; i < nb_nics; i++) {
 497         nd = &nd_table[i];
 498         if (!nd->model) {
 499             nd->model = "pcnet";
 500         }
 501         if (i == 0  && strcmp(nd->model, "pcnet") == 0) {
 502             /* The malta board has a PCNet card using PCI SLOT 11 */
 503             pci_nic_init(pci_bus, nd, 88);
 504         } else {
 505             pci_nic_init(pci_bus, nd, -1);
 506         }
 507     }
 508 }
 509
 510 /* ROM and pseudo bootloader
 511
 512    The following code implements a very very simple bootloader. It first
 513    loads the registers a0 to a3 to the values expected by the OS, and
 514    then jump at the kernel address.
 515
 516    The bootloader should pass the locations of the kernel arguments and
 517    environment variables tables. Those tables contain the 32-bit address
 518    of NULL terminated strings. The environment variables table should be
 519    terminated by a NULL address.
 520
 521    For a simpler implementation, the number of kernel arguments is fixed
 522    to two (the name of the kernel and the command line), and the two
 523    tables are actually the same one.
 524
 525    The registers a0 to a3 should contain the following values:
 526      a0 - number of kernel arguments
 527      a1 - 32-bit address of the kernel arguments table
 528      a2 - 32-bit address of the environment variables table
 529      a3 - RAM size in bytes
 530 */
 531
 532 static void write_bootloader (CPUState *env, unsigned long bios_offset, int64_t kernel_entry)
 533 {
 534     uint32_t *p;
 535
 536     /* Small bootloader */
 537     p = (uint32_t *) (phys_ram_base + bios_offset);
 538     stl_raw(p++, 0x0bf00010);                                      /* j 0x1fc00040 */
 539     stl_raw(p++, 0x00000000);                                      /* nop */
 540
 541     /* Second part of the bootloader */
 542     p = (uint32_t *) (phys_ram_base + bios_offset + 0x040);
 543     stl_raw(p++, 0x3c040000);                                      /* lui a0, 0 */
 544     stl_raw(p++, 0x34840002);                                      /* ori a0, a0, 2 */
 545     stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 546     stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */
 547     stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 548     stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 549     stl_raw(p++, 0x3c070000 | (env->ram_size >> 16));              /* lui a3, high(env->ram_size) */
 550     stl_raw(p++, 0x34e70000 | (env->ram_size & 0xffff));           /* ori a3, a3, low(env->ram_size) */
 551
 552     /* Load BAR registers as done by YAMON */
 553     stl_raw(p++, 0x3c09bbe0);                                      /* lui t1, 0xbbe0 */
 554
 555 #ifdef TARGET_WORDS_BIGENDIAN
 556     stl_raw(p++, 0x3c08c000);                                      /* lui t0, 0xc000 */
 557 #else
 558     stl_raw(p++, 0x340800c0);                                      /* ori t0, r0, 0x00c0 */
 559 #endif
 560     stl_raw(p++, 0xad280048);                                      /* sw t0, 0x0048(t1) */
 561 #ifdef TARGET_WORDS_BIGENDIAN
 562     stl_raw(p++, 0x3c084000);                                      /* lui t0, 0x4000 */
 563 #else
 564     stl_raw(p++, 0x34080040);                                      /* ori t0, r0, 0x0040 */
 565 #endif
 566     stl_raw(p++, 0xad280050);                                      /* sw t0, 0x0050(t1) */
 567
 568 #ifdef TARGET_WORDS_BIGENDIAN
 569     stl_raw(p++, 0x3c088000);                                      /* lui t0, 0x8000 */
 570 #else
 571     stl_raw(p++, 0x34080080);                                      /* ori t0, r0, 0x0080 */
 572 #endif
 573     stl_raw(p++, 0xad280058);                                      /* sw t0, 0x0058(t1) */
 574 #ifdef TARGET_WORDS_BIGENDIAN
 575     stl_raw(p++, 0x3c083f00);                                      /* lui t0, 0x3f00 */
 576 #else
 577     stl_raw(p++, 0x3408003f);                                      /* ori t0, r0, 0x003f */
 578 #endif
 579     stl_raw(p++, 0xad280060);                                      /* sw t0, 0x0060(t1) */
 580
 581 #ifdef TARGET_WORDS_BIGENDIAN
 582     stl_raw(p++, 0x3c08c100);                                      /* lui t0, 0xc100 */
 583 #else
 584     stl_raw(p++, 0x340800c1);                                      /* ori t0, r0, 0x00c1 */
 585 #endif
 586     stl_raw(p++, 0xad280080);                                      /* sw t0, 0x0080(t1) */
 587 #ifdef TARGET_WORDS_BIGENDIAN
 588     stl_raw(p++, 0x3c085e00);                                      /* lui t0, 0x5e00 */
 589 #else
 590     stl_raw(p++, 0x3408005e);                                      /* ori t0, r0, 0x005e */
 591 #endif
 592     stl_raw(p++, 0xad280088);                                      /* sw t0, 0x0088(t1) */
 593
 594     /* Jump to kernel code */
 595     stl_raw(p++, 0x3c1f0000 | ((kernel_entry >> 16) & 0xffff));    /* lui ra, high(kernel_entry) */
 596     stl_raw(p++, 0x37ff0000 | (kernel_entry & 0xffff));            /* ori ra, ra, low(kernel_entry) */
 597     stl_raw(p++, 0x03e00008);                                      /* jr ra */
 598     stl_raw(p++, 0x00000000);                                      /* nop */
 599 }
 600
 601 static void prom_set(int index, const char *string, ...)
 602 {
 603     va_list ap;
 604     int32_t *p;
 605     int32_t table_addr;
 606     char *s;
 607
 608     if (index >= ENVP_NB_ENTRIES)
 609         return;
 610
 611     p = (int32_t *) (phys_ram_base + ENVP_ADDR + VIRT_TO_PHYS_ADDEND);
 612     p += index;
 613
 614     if (string == NULL) {
 615         stl_raw(p, 0);
 616         return;
 617     }
 618
 619     table_addr = ENVP_ADDR + sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
 620     s = (char *) (phys_ram_base + VIRT_TO_PHYS_ADDEND + table_addr);
 621
 622     stl_raw(p, table_addr);
 623
 624     va_start(ap, string);
 625     vsnprintf (s, ENVP_ENTRY_SIZE, string, ap);
 626     va_end(ap);
 627 }
 628
 629 /* Kernel */
 630 static int64_t load_kernel (CPUState *env)
 631 {
 632     int64_t kernel_entry, kernel_low, kernel_high;
 633     int index = 0;
 634     long initrd_size;
 635     ram_addr_t initrd_offset;
 636
 637     if (load_elf(env->kernel_filename, VIRT_TO_PHYS_ADDEND,
 638                  &kernel_entry, &kernel_low, &kernel_high) < 0) {
 639         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 640                 env->kernel_filename);
 641       exit(1);
 642     }
 643
 644     /* load initrd */
 645     initrd_size = 0;
 646     initrd_offset = 0;
 647     if (env->initrd_filename) {
 648         initrd_size = get_image_size (env->initrd_filename);
 649         if (initrd_size > 0) {
 650             initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
 651             if (initrd_offset + initrd_size > env->ram_size) {
 652                 fprintf(stderr,
 653                         "qemu: memory too small for initial ram disk '%s'\n",
 654                         env->initrd_filename);
 655                 exit(1);
 656             }
 657             initrd_size = load_image(env->initrd_filename,
 658                                      phys_ram_base + initrd_offset);
 659         }
 660         if (initrd_size == (target_ulong) -1) {
 661             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 662                     env->initrd_filename);
 663             exit(1);
 664         }
 665     }
 666
 667     /* Store command line.  */
 668     prom_set(index++, env->kernel_filename);
 669     if (initrd_size > 0)
 670         prom_set(index++, "rd_start=0x" TARGET_FMT_lx " rd_size=%li %s",
 671                  PHYS_TO_VIRT(initrd_offset), initrd_size,
 672                  env->kernel_cmdline);
 673     else
 674         prom_set(index++, env->kernel_cmdline);
 675
 676     /* Setup minimum environment variables */
 677     prom_set(index++, "memsize");
 678     prom_set(index++, "%i", env->ram_size);
 679     prom_set(index++, "modetty0");
 680     prom_set(index++, "38400n8r");
 681     prom_set(index++, NULL);
 682
 683     return kernel_entry;
 684 }
 685
 686 static void main_cpu_reset(void *opaque)
 687 {
 688     CPUState *env = opaque;
 689     cpu_reset(env);
 690
 691     /* The bootload does not need to be rewritten as it is located in a
 692        read only location. The kernel location and the arguments table
 693        location does not change. */
 694     if (env->kernel_filename) {
 695         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 696         load_kernel (env);
 697     }
 698 }
 699
 700 static
 701 void mips_malta_init (int ram_size, int vga_ram_size, int boot_device,
 702                       DisplayState *ds, const char **fd_filename, int snapshot,
 703                       const char *kernel_filename, const char *kernel_cmdline,
 704                       const char *initrd_filename, const char *cpu_model)
 705 {
 706     char buf[1024];
 707     unsigned long bios_offset;
 708     int64_t kernel_entry;
 709     PCIBus *pci_bus;
 710     CPUState *env;
 711     RTCState *rtc_state;
 712     /* fdctrl_t *floppy_controller; */
 713     MaltaFPGAState *malta_fpga;
 714     int ret;
 715     mips_def_t *def;
 716     qemu_irq *i8259;
 717
 718     /* init CPUs */
 719     if (cpu_model == NULL) {
 720 #ifdef TARGET_MIPS64
 721         cpu_model = "R4000";
 722 #else
 723         cpu_model = "4KEc";
 724 #endif
 725     }
 726     if (mips_find_by_name(cpu_model, &def) != 0)
 727         def = NULL;
 728     env = cpu_init();
 729     cpu_mips_register(env, def);
 730     register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
 731     qemu_register_reset(main_cpu_reset, env);
 732
 733     /* allocate RAM */
 734     cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
 735
 736     /* Map the bios at two physical locations, as on the real board */
 737     bios_offset = ram_size + vga_ram_size;
 738     cpu_register_physical_memory(0x1e000000LL,
 739                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 740     cpu_register_physical_memory(0x1fc00000LL,
 741                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 742
 743     /* Load a BIOS image except if a kernel image has been specified. In
 744        the later case, just write a small bootloader to the flash
 745        location. */
 746     if (kernel_filename) {
 747         env->ram_size = ram_size;
 748         env->kernel_filename = kernel_filename;
 749         env->kernel_cmdline = kernel_cmdline;
 750         env->initrd_filename = initrd_filename;
 751         kernel_entry = load_kernel(env);
 752         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 753         write_bootloader(env, bios_offset, kernel_entry);
 754     } else {
 755         snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
 756         ret = load_image(buf, phys_ram_base + bios_offset);
 757         if (ret < 0 || ret > BIOS_SIZE) {
 758             fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
 759                     buf);
 760             exit(1);
 761         }
 762     }
 763
 764     /* Board ID = 0x420 (Malta Board with CoreLV)
 765        XXX: theoretically 0x1e000010 should map to flash and 0x1fc00010 should
 766        map to the board ID. */
 767     stl_raw(phys_ram_base + bios_offset + 0x10, 0x00000420);
 768
 769     /* Init internal devices */
 770     cpu_mips_irq_init_cpu(env);
 771     cpu_mips_clock_init(env);
 772     cpu_mips_irqctrl_init();
 773
 774     /* FPGA */
 775     malta_fpga = malta_fpga_init(0x1f000000LL, env);
 776
 777     /* Interrupt controller */
 778     /* The 8259 is attached to the MIPS CPU INT0 pin, ie interrupt 2 */
 779     i8259 = i8259_init(env->irq[2]);
 780
 781     /* Northbridge */
 782     pci_bus = pci_gt64120_init(i8259);
 783
 784     /* Southbridge */
 785     piix4_init(pci_bus, 80);
 786     pci_piix3_ide_init(pci_bus, bs_table, 81, i8259);
 787     usb_uhci_init(pci_bus, 82);
 788     piix4_pm_init(pci_bus, 83);
 789     pit = pit_init(0x40, i8259[0]);
 790     DMA_init(0);
 791
 792     /* Super I/O */
 793     i8042_init(i8259[1], i8259[12], 0x60);
 794     rtc_state = rtc_init(0x70, i8259[8]);
 795     if (serial_hds[0])
 796         serial_init(0x3f8, i8259[4], serial_hds[0]);
 797     if (serial_hds[1])
 798         serial_init(0x2f8, i8259[3], serial_hds[1]);
 799     if (parallel_hds[0])
 800         parallel_init(0x378, i8259[7], parallel_hds[0]);
 801     /* XXX: The floppy controller does not work correctly, something is
 802        probably wrong.
 803     floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd_table); */
 804
 805     /* Sound card */
 806 #ifdef HAS_AUDIO
 807     audio_init(pci_bus);
 808 #endif
 809
 810     /* Network card */
 811     network_init(pci_bus);
 812
 813     /* Optional PCI video card */
 814     pci_cirrus_vga_init(pci_bus, ds, phys_ram_base + ram_size,
 815                         ram_size, vga_ram_size);
 816 }
 817
 818 QEMUMachine mips_malta_machine = {
 819     "malta",
 820     "MIPS Malta Core LV",
 821     mips_malta_init,
 822 };