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 "hw.h"
  26 #include "pc.h"
  27 #include "fdc.h"
  28 #include "net.h"
  29 #include "boards.h"
  30 #include "smbus.h"
  31 #include "block.h"
  32 #include "flash.h"
  33 #include "mips.h"
  34 #include "pci.h"
  35 #include "qemu-char.h"
  36 #include "sysemu.h"
  37 #include "audio/audio.h"
  38 #include "boards.h"
  39
  40 //#define DEBUG_BOARD_INIT
  41
  42 #ifdef TARGET_WORDS_BIGENDIAN
  43 #define BIOS_FILENAME "mips_bios.bin"
  44 #else
  45 #define BIOS_FILENAME "mipsel_bios.bin"
  46 #endif
  47
  48 #ifdef TARGET_MIPS64
  49 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
  50 #else
  51 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffU)
  52 #endif
  53
  54 #define ENVP_ADDR (int32_t)0x80002000
  55 #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
  56
  57 #define ENVP_NB_ENTRIES         16
  58 #define ENVP_ENTRY_SIZE         256
  59
  60 #define MAX_IDE_BUS 2
  61
  62 extern FILE *logfile;
  63
  64 typedef struct {
  65     uint32_t leds;
  66     uint32_t brk;
  67     uint32_t gpout;
  68     uint32_t i2cin;
  69     uint32_t i2coe;
  70     uint32_t i2cout;
  71     uint32_t i2csel;
  72     CharDriverState *display;
  73     char display_text[9];
  74     SerialState *uart;
  75 } MaltaFPGAState;
  76
  77 static PITState *pit;
  78
  79 static struct _loaderparams {
  80     int ram_size;
  81     const char *kernel_filename;
  82     const char *kernel_cmdline;
  83     const char *initrd_filename;
  84 } loaderparams;
  85
  86 /* Malta FPGA */
  87 static void malta_fpga_update_display(void *opaque)
  88 {
  89     char leds_text[9];
  90     int i;
  91     MaltaFPGAState *s = opaque;
  92
  93     for (i = 7 ; i >= 0 ; i--) {
  94         if (s->leds & (1 << i))
  95             leds_text[i] = '#';
  96         else
  97             leds_text[i] = ' ';
  98     }
  99     leds_text[8] = '\0';
 100
 101     qemu_chr_printf(s->display, "\e[H\n\n|\e[32m%-8.8s\e[00m|\r\n", leds_text);
 102     qemu_chr_printf(s->display, "\n\n\n\n|\e[31m%-8.8s\e[00m|", s->display_text);
 103 }
 104
 105 /*
 106  * EEPROM 24C01 / 24C02 emulation.
 107  *
 108  * Emulation for serial EEPROMs:
 109  * 24C01 - 1024 bit (128 x 8)
 110  * 24C02 - 2048 bit (256 x 8)
 111  *
 112  * Typical device names include Microchip 24C02SC or SGS Thomson ST24C02.
 113  */
 114
 115 //~ #define DEBUG
 116
 117 #if defined(DEBUG)
 118 #  define logout(fmt, args...) fprintf(stderr, "MALTA\t%-24s" fmt, __func__, ##args)
 119 #else
 120 #  define logout(fmt, args...) ((void)0)
 121 #endif
 122
 123 struct _eeprom24c0x_t {
 124   uint8_t tick;
 125   uint8_t address;
 126   uint8_t command;
 127   uint8_t ack;
 128   uint8_t scl;
 129   uint8_t sda;
 130   uint8_t data;
 131   //~ uint16_t size;
 132   uint8_t contents[256];
 133 };
 134
 135 typedef struct _eeprom24c0x_t eeprom24c0x_t;
 136
 137 static eeprom24c0x_t eeprom = {
 138     contents: {
 139         /* 00000000: */ 0x80,0x08,0x04,0x0D,0x0A,0x01,0x40,0x00,
 140         /* 00000008: */ 0x01,0x75,0x54,0x00,0x82,0x08,0x00,0x01,
 141         /* 00000010: */ 0x8F,0x04,0x02,0x01,0x01,0x00,0x0E,0x00,
 142         /* 00000018: */ 0x00,0x00,0x00,0x14,0x0F,0x14,0x2D,0x40,
 143         /* 00000020: */ 0x15,0x08,0x15,0x08,0x00,0x00,0x00,0x00,
 144         /* 00000028: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 145         /* 00000030: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 146         /* 00000038: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x12,0xD0,
 147         /* 00000040: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 148         /* 00000048: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 149         /* 00000050: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 150         /* 00000058: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 151         /* 00000060: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 152         /* 00000068: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 153         /* 00000070: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 154         /* 00000078: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x64,0xF4,
 155     },
 156 };
 157
 158 static uint8_t eeprom24c0x_read()
 159 {
 160     logout("%u: scl = %u, sda = %u, data = 0x%02x\n",
 161         eeprom.tick, eeprom.scl, eeprom.sda, eeprom.data);
 162     return eeprom.sda;
 163 }
 164
 165 static void eeprom24c0x_write(int scl, int sda)
 166 {
 167     if (eeprom.scl && scl && (eeprom.sda != sda)) {
 168         logout("%u: scl = %u->%u, sda = %u->%u i2c %s\n",
 169                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda, sda ? "stop" : "start");
 170         if (!sda) {
 171             eeprom.tick = 1;
 172             eeprom.command = 0;
 173         }
 174     } else if (eeprom.tick == 0 && !eeprom.ack) {
 175         /* Waiting for start. */
 176         logout("%u: scl = %u->%u, sda = %u->%u wait for i2c start\n",
 177                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 178     } else if (!eeprom.scl && scl) {
 179         logout("%u: scl = %u->%u, sda = %u->%u trigger bit\n",
 180                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 181         if (eeprom.ack) {
 182             logout("\ti2c ack bit = 0\n");
 183             sda = 0;
 184             eeprom.ack = 0;
 185         } else if (eeprom.sda == sda) {
 186             uint8_t bit = (sda != 0);
 187             logout("\ti2c bit = %d\n", bit);
 188             if (eeprom.tick < 9) {
 189                 eeprom.command <<= 1;
 190                 eeprom.command += bit;
 191                 eeprom.tick++;
 192                 if (eeprom.tick == 9) {
 193                     logout("\tcommand 0x%04x, %s\n", eeprom.command, bit ? "read" : "write");
 194                     eeprom.ack = 1;
 195                 }
 196             } else if (eeprom.tick < 17) {
 197                 if (eeprom.command & 1) {
 198                     sda = ((eeprom.data & 0x80) != 0);
 199                 }
 200                 eeprom.address <<= 1;
 201                 eeprom.address += bit;
 202                 eeprom.tick++;
 203                 eeprom.data <<= 1;
 204                 if (eeprom.tick == 17) {
 205                     eeprom.data = eeprom.contents[eeprom.address];
 206                     logout("\taddress 0x%04x, data 0x%02x\n", eeprom.address, eeprom.data);
 207                     eeprom.ack = 1;
 208                     eeprom.tick = 0;
 209                 }
 210             } else if (eeprom.tick >= 17) {
 211                 sda = 0;
 212             }
 213         } else {
 214             logout("\tsda changed with raising scl\n");
 215         }
 216     } else {
 217         logout("%u: scl = %u->%u, sda = %u->%u\n", eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 218     }
 219     eeprom.scl = scl;
 220     eeprom.sda = sda;
 221 }
 222
 223 static uint32_t malta_fpga_readl(void *opaque, target_phys_addr_t addr)
 224 {
 225     MaltaFPGAState *s = opaque;
 226     uint32_t val = 0;
 227     uint32_t saddr;
 228
 229     saddr = (addr & 0xfffff);
 230
 231     switch (saddr) {
 232
 233     /* SWITCH Register */
 234     case 0x00200:
 235         val = 0x00000000;               /* All switches closed */
 236         break;
 237
 238     /* STATUS Register */
 239     case 0x00208:
 240 #ifdef TARGET_WORDS_BIGENDIAN
 241         val = 0x00000012;
 242 #else
 243         val = 0x00000010;
 244 #endif
 245         break;
 246
 247     /* JMPRS Register */
 248     case 0x00210:
 249         val = 0x00;
 250         break;
 251
 252     /* LEDBAR Register */
 253     case 0x00408:
 254         val = s->leds;
 255         break;
 256
 257     /* BRKRES Register */
 258     case 0x00508:
 259         val = s->brk;
 260         break;
 261
 262     /* UART Registers are handled directly by the serial device */
 263
 264     /* GPOUT Register */
 265     case 0x00a00:
 266         val = s->gpout;
 267         break;
 268
 269     /* XXX: implement a real I2C controller */
 270
 271     /* GPINP Register */
 272     case 0x00a08:
 273         /* IN = OUT until a real I2C control is implemented */
 274         if (s->i2csel)
 275             val = s->i2cout;
 276         else
 277             val = 0x00;
 278         break;
 279
 280     /* I2CINP Register */
 281     case 0x00b00:
 282         val = ((s->i2cin & ~1) | eeprom24c0x_read());
 283         break;
 284
 285     /* I2COE Register */
 286     case 0x00b08:
 287         val = s->i2coe;
 288         break;
 289
 290     /* I2COUT Register */
 291     case 0x00b10:
 292         val = s->i2cout;
 293         break;
 294
 295     /* I2CSEL Register */
 296     case 0x00b18:
 297         val = s->i2csel;
 298         break;
 299
 300     default:
 301 #if 0
 302         printf ("malta_fpga_read: Bad register offset 0x" TARGET_FMT_lx "\n",
 303                 addr);
 304 #endif
 305         break;
 306     }
 307     return val;
 308 }
 309
 310 static void malta_fpga_writel(void *opaque, target_phys_addr_t addr,
 311                               uint32_t val)
 312 {
 313     MaltaFPGAState *s = opaque;
 314     uint32_t saddr;
 315
 316     saddr = (addr & 0xfffff);
 317
 318     switch (saddr) {
 319
 320     /* SWITCH Register */
 321     case 0x00200:
 322         break;
 323
 324     /* JMPRS Register */
 325     case 0x00210:
 326         break;
 327
 328     /* LEDBAR Register */
 329     /* XXX: implement a 8-LED array */
 330     case 0x00408:
 331         s->leds = val & 0xff;
 332         break;
 333
 334     /* ASCIIWORD Register */
 335     case 0x00410:
 336         snprintf(s->display_text, 9, "%08X", val);
 337         malta_fpga_update_display(s);
 338         break;
 339
 340     /* ASCIIPOS0 to ASCIIPOS7 Registers */
 341     case 0x00418:
 342     case 0x00420:
 343     case 0x00428:
 344     case 0x00430:
 345     case 0x00438:
 346     case 0x00440:
 347     case 0x00448:
 348     case 0x00450:
 349         s->display_text[(saddr - 0x00418) >> 3] = (char) val;
 350         malta_fpga_update_display(s);
 351         break;
 352
 353     /* SOFTRES Register */
 354     case 0x00500:
 355         if (val == 0x42)
 356             qemu_system_reset_request ();
 357         break;
 358
 359     /* BRKRES Register */
 360     case 0x00508:
 361         s->brk = val & 0xff;
 362         break;
 363
 364     /* UART Registers are handled directly by the serial device */
 365
 366     /* GPOUT Register */
 367     case 0x00a00:
 368         s->gpout = val & 0xff;
 369         break;
 370
 371     /* I2COE Register */
 372     case 0x00b08:
 373         s->i2coe = val & 0x03;
 374         break;
 375
 376     /* I2COUT Register */
 377     case 0x00b10:
 378         eeprom24c0x_write(val & 0x02, val & 0x01);
 379         s->i2cout = val;
 380         break;
 381
 382     /* I2CSEL Register */
 383     case 0x00b18:
 384         s->i2csel = val & 0x01;
 385         break;
 386
 387     default:
 388 #if 0
 389         printf ("malta_fpga_write: Bad register offset 0x" TARGET_FMT_lx "\n",
 390                 addr);
 391 #endif
 392         break;
 393     }
 394 }
 395
 396 static CPUReadMemoryFunc *malta_fpga_read[] = {
 397    malta_fpga_readl,
 398    malta_fpga_readl,
 399    malta_fpga_readl
 400 };
 401
 402 static CPUWriteMemoryFunc *malta_fpga_write[] = {
 403    malta_fpga_writel,
 404    malta_fpga_writel,
 405    malta_fpga_writel
 406 };
 407
 408 static void malta_fpga_reset(void *opaque)
 409 {
 410     MaltaFPGAState *s = opaque;
 411
 412     s->leds   = 0x00;
 413     s->brk    = 0x0a;
 414     s->gpout  = 0x00;
 415     s->i2cin  = 0x3;
 416     s->i2coe  = 0x0;
 417     s->i2cout = 0x3;
 418     s->i2csel = 0x1;
 419
 420     s->display_text[8] = '\0';
 421     snprintf(s->display_text, 9, "        ");
 422     malta_fpga_update_display(s);
 423 }
 424
 425 static MaltaFPGAState *malta_fpga_init(target_phys_addr_t base, CPUState *env)
 426 {
 427     MaltaFPGAState *s;
 428     CharDriverState *uart_chr;
 429     int malta;
 430
 431     s = (MaltaFPGAState *)qemu_mallocz(sizeof(MaltaFPGAState));
 432
 433     malta = cpu_register_io_memory(0, malta_fpga_read,
 434                                    malta_fpga_write, s);
 435
 436     cpu_register_physical_memory(base, 0x900, malta);
 437     cpu_register_physical_memory(base + 0xa00, 0x100000 - 0xa00, malta);
 438
 439     s->display = qemu_chr_open("vc");
 440     qemu_chr_printf(s->display, "\e[HMalta LEDBAR\r\n");
 441     qemu_chr_printf(s->display, "+--------+\r\n");
 442     qemu_chr_printf(s->display, "+        +\r\n");
 443     qemu_chr_printf(s->display, "+--------+\r\n");
 444     qemu_chr_printf(s->display, "\n");
 445     qemu_chr_printf(s->display, "Malta ASCII\r\n");
 446     qemu_chr_printf(s->display, "+--------+\r\n");
 447     qemu_chr_printf(s->display, "+        +\r\n");
 448     qemu_chr_printf(s->display, "+--------+\r\n");
 449
 450     uart_chr = qemu_chr_open("vc");
 451     qemu_chr_printf(uart_chr, "CBUS UART\r\n");
 452     s->uart = serial_mm_init(base + 0x900, 3, env->irq[2], uart_chr, 1);
 453
 454     malta_fpga_reset(s);
 455     qemu_register_reset(malta_fpga_reset, s);
 456
 457     return s;
 458 }
 459
 460 /* Audio support */
 461 #ifdef HAS_AUDIO
 462 static void audio_init (PCIBus *pci_bus)
 463 {
 464     struct soundhw *c;
 465     int audio_enabled = 0;
 466
 467     for (c = soundhw; !audio_enabled && c->name; ++c) {
 468         audio_enabled = c->enabled;
 469     }
 470
 471     if (audio_enabled) {
 472         AudioState *s;
 473
 474         s = AUD_init ();
 475         if (s) {
 476             for (c = soundhw; c->name; ++c) {
 477                 if (c->enabled)
 478                     c->init.init_pci (pci_bus, s);
 479             }
 480         }
 481     }
 482 }
 483 #endif
 484
 485 /* Network support */
 486 static void network_init (PCIBus *pci_bus)
 487 {
 488     int i;
 489     NICInfo *nd;
 490
 491     for(i = 0; i < nb_nics; i++) {
 492         nd = &nd_table[i];
 493         if (!nd->model) {
 494             nd->model = "pcnet";
 495         }
 496         if (i == 0  && strcmp(nd->model, "pcnet") == 0) {
 497             /* The malta board has a PCNet card using PCI SLOT 11 */
 498             pci_nic_init(pci_bus, nd, 88);
 499         } else {
 500             pci_nic_init(pci_bus, nd, -1);
 501         }
 502     }
 503 }
 504
 505 /* ROM and pseudo bootloader
 506
 507    The following code implements a very very simple bootloader. It first
 508    loads the registers a0 to a3 to the values expected by the OS, and
 509    then jump at the kernel address.
 510
 511    The bootloader should pass the locations of the kernel arguments and
 512    environment variables tables. Those tables contain the 32-bit address
 513    of NULL terminated strings. The environment variables table should be
 514    terminated by a NULL address.
 515
 516    For a simpler implementation, the number of kernel arguments is fixed
 517    to two (the name of the kernel and the command line), and the two
 518    tables are actually the same one.
 519
 520    The registers a0 to a3 should contain the following values:
 521      a0 - number of kernel arguments
 522      a1 - 32-bit address of the kernel arguments table
 523      a2 - 32-bit address of the environment variables table
 524      a3 - RAM size in bytes
 525 */
 526
 527 static void write_bootloader (CPUState *env, unsigned long bios_offset, int64_t kernel_entry)
 528 {
 529     uint32_t *p;
 530
 531     /* Small bootloader */
 532     p = (uint32_t *) (phys_ram_base + bios_offset);
 533     stl_raw(p++, 0x0bf00160);                                      /* j 0x1fc00580 */
 534     stl_raw(p++, 0x00000000);                                      /* nop */
 535
 536     /* YAMON service vector */
 537     stl_raw(phys_ram_base + bios_offset + 0x500, 0xbfc00580);      /* start: */
 538     stl_raw(phys_ram_base + bios_offset + 0x504, 0xbfc0083c);      /* print_count: */
 539     stl_raw(phys_ram_base + bios_offset + 0x520, 0xbfc00580);      /* start: */
 540     stl_raw(phys_ram_base + bios_offset + 0x52c, 0xbfc00800);      /* flush_cache: */
 541     stl_raw(phys_ram_base + bios_offset + 0x534, 0xbfc00808);      /* print: */
 542     stl_raw(phys_ram_base + bios_offset + 0x538, 0xbfc00800);      /* reg_cpu_isr: */
 543     stl_raw(phys_ram_base + bios_offset + 0x53c, 0xbfc00800);      /* unred_cpu_isr: */
 544     stl_raw(phys_ram_base + bios_offset + 0x540, 0xbfc00800);      /* reg_ic_isr: */
 545     stl_raw(phys_ram_base + bios_offset + 0x544, 0xbfc00800);      /* unred_ic_isr: */
 546     stl_raw(phys_ram_base + bios_offset + 0x548, 0xbfc00800);      /* reg_esr: */
 547     stl_raw(phys_ram_base + bios_offset + 0x54c, 0xbfc00800);      /* unreg_esr: */
 548     stl_raw(phys_ram_base + bios_offset + 0x550, 0xbfc00800);      /* getchar: */
 549     stl_raw(phys_ram_base + bios_offset + 0x554, 0xbfc00800);      /* syscon_read: */
 550
 551
 552     /* Second part of the bootloader */
 553     p = (uint32_t *) (phys_ram_base + bios_offset + 0x580);
 554     stl_raw(p++, 0x24040002);                                      /* addiu a0, zero, 2 */
 555     stl_raw(p++, 0x3c1d0000 | (((ENVP_ADDR - 64) >> 16) & 0xffff)); /* lui sp, high(ENVP_ADDR) */
 556     stl_raw(p++, 0x37bd0000 | ((ENVP_ADDR - 64) & 0xffff));        /* ori sp, sp, low(ENVP_ADDR) */
 557     stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 558     stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a1, low(ENVP_ADDR) */
 559     stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 560     stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 561     stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));     /* lui a3, high(ram_size) */
 562     stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));  /* ori a3, a3, low(ram_size) */
 563
 564     /* Load BAR registers as done by YAMON */
 565     stl_raw(p++, 0x3c09b400);                                      /* lui t1, 0xb400 */
 566
 567 #ifdef TARGET_WORDS_BIGENDIAN
 568     stl_raw(p++, 0x3c08df00);                                      /* lui t0, 0xdf00 */
 569 #else
 570     stl_raw(p++, 0x340800df);                                      /* ori t0, r0, 0x00df */
 571 #endif
 572     stl_raw(p++, 0xad280068);                                      /* sw t0, 0x0068(t1) */
 573
 574     stl_raw(p++, 0x3c09bbe0);                                      /* lui t1, 0xbbe0 */
 575
 576 #ifdef TARGET_WORDS_BIGENDIAN
 577     stl_raw(p++, 0x3c08c000);                                      /* lui t0, 0xc000 */
 578 #else
 579     stl_raw(p++, 0x340800c0);                                      /* ori t0, r0, 0x00c0 */
 580 #endif
 581     stl_raw(p++, 0xad280048);                                      /* sw t0, 0x0048(t1) */
 582 #ifdef TARGET_WORDS_BIGENDIAN
 583     stl_raw(p++, 0x3c084000);                                      /* lui t0, 0x4000 */
 584 #else
 585     stl_raw(p++, 0x34080040);                                      /* ori t0, r0, 0x0040 */
 586 #endif
 587     stl_raw(p++, 0xad280050);                                      /* sw t0, 0x0050(t1) */
 588
 589 #ifdef TARGET_WORDS_BIGENDIAN
 590     stl_raw(p++, 0x3c088000);                                      /* lui t0, 0x8000 */
 591 #else
 592     stl_raw(p++, 0x34080080);                                      /* ori t0, r0, 0x0080 */
 593 #endif
 594     stl_raw(p++, 0xad280058);                                      /* sw t0, 0x0058(t1) */
 595 #ifdef TARGET_WORDS_BIGENDIAN
 596     stl_raw(p++, 0x3c083f00);                                      /* lui t0, 0x3f00 */
 597 #else
 598     stl_raw(p++, 0x3408003f);                                      /* ori t0, r0, 0x003f */
 599 #endif
 600     stl_raw(p++, 0xad280060);                                      /* sw t0, 0x0060(t1) */
 601
 602 #ifdef TARGET_WORDS_BIGENDIAN
 603     stl_raw(p++, 0x3c08c100);                                      /* lui t0, 0xc100 */
 604 #else
 605     stl_raw(p++, 0x340800c1);                                      /* ori t0, r0, 0x00c1 */
 606 #endif
 607     stl_raw(p++, 0xad280080);                                      /* sw t0, 0x0080(t1) */
 608 #ifdef TARGET_WORDS_BIGENDIAN
 609     stl_raw(p++, 0x3c085e00);                                      /* lui t0, 0x5e00 */
 610 #else
 611     stl_raw(p++, 0x3408005e);                                      /* ori t0, r0, 0x005e */
 612 #endif
 613     stl_raw(p++, 0xad280088);                                      /* sw t0, 0x0088(t1) */
 614
 615     /* Jump to kernel code */
 616     stl_raw(p++, 0x3c1f0000 | ((kernel_entry >> 16) & 0xffff));    /* lui ra, high(kernel_entry) */
 617     stl_raw(p++, 0x37ff0000 | (kernel_entry & 0xffff));            /* ori ra, ra, low(kernel_entry) */
 618     stl_raw(p++, 0x03e00008);                                      /* jr ra */
 619     stl_raw(p++, 0x00000000);                                      /* nop */
 620
 621     /* YAMON subroutines */
 622     p = (uint32_t *) (phys_ram_base + bios_offset + 0x800);
 623     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 624     stl_raw(p++, 0x24020000);                                     /* li v0,0 */
 625    /* 808 YAMON print */
 626     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 627     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 628     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 629     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 630     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 631     stl_raw(p++, 0x10800005);                                     /* beqz a0,834 */
 632     stl_raw(p++, 0x00000000);                                     /* nop */
 633     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 634     stl_raw(p++, 0x00000000);                                     /* nop */
 635     stl_raw(p++, 0x08000205);                                     /* j 814 */
 636     stl_raw(p++, 0x00000000);                                     /* nop */
 637     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 638     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 639     /* 0x83c YAMON print_count */
 640     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 641     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 642     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 643     stl_raw(p++, 0x00c06021);                                     /* move t4,a2 */
 644     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 645     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 646     stl_raw(p++, 0x00000000);                                     /* nop */
 647     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 648     stl_raw(p++, 0x258cffff);                                     /* addiu t4,t4,-1 */
 649     stl_raw(p++, 0x1580fffa);                                     /* bnez t4,84c */
 650     stl_raw(p++, 0x00000000);                                     /* nop */
 651     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 652     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 653     /* 0x870 */
 654     stl_raw(p++, 0x3c08b800);                                     /* lui t0,0xb400 */
 655     stl_raw(p++, 0x350803f8);                                     /* ori t0,t0,0x3f8 */
 656     stl_raw(p++, 0x91090005);                                     /* lbu t1,5(t0) */
 657     stl_raw(p++, 0x00000000);                                     /* nop */
 658     stl_raw(p++, 0x31290040);                                     /* andi t1,t1,0x40 */
 659     stl_raw(p++, 0x1120fffc);                                     /* beqz t1,878 <outch+0x8> */
 660     stl_raw(p++, 0x00000000);                                     /* nop */
 661     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 662     stl_raw(p++, 0xa1040000);                                     /* sb a0,0(t0) */
 663
 664 }
 665
 666 static void prom_set(int index, const char *string, ...)
 667 {
 668     va_list ap;
 669     int32_t *p;
 670     int32_t table_addr;
 671     char *s;
 672
 673     if (index >= ENVP_NB_ENTRIES)
 674         return;
 675
 676     p = (int32_t *) (phys_ram_base + ENVP_ADDR + VIRT_TO_PHYS_ADDEND);
 677     p += index;
 678
 679     if (string == NULL) {
 680         stl_raw(p, 0);
 681         return;
 682     }
 683
 684     table_addr = ENVP_ADDR + sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
 685     s = (char *) (phys_ram_base + VIRT_TO_PHYS_ADDEND + table_addr);
 686
 687     stl_raw(p, table_addr);
 688
 689     va_start(ap, string);
 690     vsnprintf (s, ENVP_ENTRY_SIZE, string, ap);
 691     va_end(ap);
 692 }
 693
 694 /* Kernel */
 695 static int64_t load_kernel (CPUState *env)
 696 {
 697     int64_t kernel_entry, kernel_low, kernel_high;
 698     int index = 0;
 699     long initrd_size;
 700     ram_addr_t initrd_offset;
 701
 702     if (load_elf(loaderparams.kernel_filename, VIRT_TO_PHYS_ADDEND,
 703                  &kernel_entry, &kernel_low, &kernel_high) < 0) {
 704         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 705                 loaderparams.kernel_filename);
 706         exit(1);
 707     }
 708
 709     /* load initrd */
 710     initrd_size = 0;
 711     initrd_offset = 0;
 712     if (loaderparams.initrd_filename) {
 713         initrd_size = get_image_size (loaderparams.initrd_filename);
 714         if (initrd_size > 0) {
 715             initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
 716             if (initrd_offset + initrd_size > ram_size) {
 717                 fprintf(stderr,
 718                         "qemu: memory too small for initial ram disk '%s'\n",
 719                         loaderparams.initrd_filename);
 720                 exit(1);
 721             }
 722             initrd_size = load_image(loaderparams.initrd_filename,
 723                                      phys_ram_base + initrd_offset);
 724         }
 725         if (initrd_size == (target_ulong) -1) {
 726             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 727                     loaderparams.initrd_filename);
 728             exit(1);
 729         }
 730     }
 731
 732     /* Store command line.  */
 733     prom_set(index++, loaderparams.kernel_filename);
 734     if (initrd_size > 0)
 735         prom_set(index++, "rd_start=0x" TARGET_FMT_lx " rd_size=%li %s",
 736                  PHYS_TO_VIRT(initrd_offset), initrd_size,
 737                  loaderparams.kernel_cmdline);
 738     else
 739         prom_set(index++, loaderparams.kernel_cmdline);
 740
 741     /* Setup minimum environment variables */
 742     prom_set(index++, "memsize");
 743     prom_set(index++, "%i", loaderparams.ram_size);
 744     prom_set(index++, "modetty0");
 745     prom_set(index++, "38400n8r");
 746     prom_set(index++, NULL);
 747
 748     return kernel_entry;
 749 }
 750
 751 static void main_cpu_reset(void *opaque)
 752 {
 753     CPUState *env = opaque;
 754     cpu_reset(env);
 755
 756     /* The bootload does not need to be rewritten as it is located in a
 757        read only location. The kernel location and the arguments table
 758        location does not change. */
 759     if (loaderparams.kernel_filename) {
 760         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 761         load_kernel (env);
 762     }
 763 }
 764
 765 static
 766 void mips_malta_init (int ram_size, int vga_ram_size,
 767                       const char *boot_device, DisplayState *ds,
 768                       const char *kernel_filename, const char *kernel_cmdline,
 769                       const char *initrd_filename, const char *cpu_model)
 770 {
 771     char buf[1024];
 772     unsigned long bios_offset;
 773     target_long bios_size;
 774     int64_t kernel_entry;
 775     PCIBus *pci_bus;
 776     CPUState *env;
 777     RTCState *rtc_state;
 778     fdctrl_t *floppy_controller;
 779     MaltaFPGAState *malta_fpga;
 780     qemu_irq *i8259;
 781     int piix4_devfn;
 782     uint8_t *eeprom_buf;
 783     i2c_bus *smbus;
 784     int i;
 785     int index;
 786     BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 787     BlockDriverState *fd[MAX_FD];
 788     int fl_idx = 0;
 789     int fl_sectors = 0;
 790
 791     /* init CPUs */
 792     if (cpu_model == NULL) {
 793 #ifdef TARGET_MIPS64
 794         cpu_model = "20Kc";
 795 #else
 796         cpu_model = "24Kf";
 797 #endif
 798     }
 799     env = cpu_init(cpu_model);
 800     if (!env) {
 801         fprintf(stderr, "Unable to find CPU definition\n");
 802         exit(1);
 803     }
 804     register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
 805     qemu_register_reset(main_cpu_reset, env);
 806
 807     /* allocate RAM */
 808     cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
 809
 810     /* Map the bios at two physical locations, as on the real board. */
 811     bios_offset = ram_size + vga_ram_size;
 812     cpu_register_physical_memory(0x1e000000LL,
 813                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 814     cpu_register_physical_memory(0x1fc00000LL,
 815                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 816
 817     /* FPGA */
 818     malta_fpga = malta_fpga_init(0x1f000000LL, env);
 819
 820     /* Load firmware in flash / BIOS unless we boot directly into a kernel. */
 821     if (kernel_filename) {
 822         /* Write a small bootloader to the flash location. */
 823         loaderparams.ram_size = ram_size;
 824         loaderparams.kernel_filename = kernel_filename;
 825         loaderparams.kernel_cmdline = kernel_cmdline;
 826         loaderparams.initrd_filename = initrd_filename;
 827         kernel_entry = load_kernel(env);
 828         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 829         write_bootloader(env, bios_offset, kernel_entry);
 830     } else {
 831         index = drive_get_index(IF_PFLASH, 0, fl_idx);
 832         if (index != -1) {
 833             /* Load firmware from flash. */
 834             bios_size = 0x400000;
 835             fl_sectors = bios_size >> 16;
 836 #ifdef DEBUG_BOARD_INIT
 837             printf("Register parallel flash %d size " TARGET_FMT_lx " at "
 838                    "offset %08lx addr %08llx '%s' %x\n",
 839                    fl_idx, bios_size, bios_offset, 0x1e000000LL,
 840                    bdrv_get_device_name(drives_table[index].bdrv), fl_sectors);
 841 #endif
 842             pflash_cfi01_register(0x1e000000LL, bios_offset,
 843                                   drives_table[index].bdrv, 65536, fl_sectors,
 844                                   4, 0x0000, 0x0000, 0x0000, 0x0000);
 845             fl_idx++;
 846         } else {
 847             /* Load a BIOS image. */
 848             if (bios_name == NULL)
 849                 bios_name = BIOS_FILENAME;
 850             snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
 851             bios_size = load_image(buf, phys_ram_base + bios_offset);
 852             if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
 853                 fprintf(stderr,
 854                         "qemu: Could not load MIPS bios '%s', and no -kernel argument was specified\n",
 855                         buf);
 856                 exit(1);
 857             }
 858         }
 859         /* In little endian mode the 32bit words in the bios are swapped,
 860            a neat trick which allows bi-endian firmware. */
 861 #ifndef TARGET_WORDS_BIGENDIAN
 862         {
 863             uint32_t *addr;
 864             for (addr = (uint32_t *)(phys_ram_base + bios_offset);
 865                  addr < (uint32_t *)(phys_ram_base + bios_offset + bios_size);
 866                  addr++) {
 867                 *addr = bswap32(*addr);
 868             }
 869         }
 870 #endif
 871     }
 872
 873     /* Board ID = 0x420 (Malta Board with CoreLV)
 874        XXX: theoretically 0x1e000010 should map to flash and 0x1fc00010 should
 875        map to the board ID. */
 876     stl_raw(phys_ram_base + bios_offset + 0x10, 0x00000420);
 877
 878     /* Init internal devices */
 879     cpu_mips_irq_init_cpu(env);
 880     cpu_mips_clock_init(env);
 881     cpu_mips_irqctrl_init();
 882
 883     /* Interrupt controller */
 884     /* The 8259 is attached to the MIPS CPU INT0 pin, ie interrupt 2 */
 885     i8259 = i8259_init(env->irq[2]);
 886
 887     /* Northbridge */
 888     pci_bus = pci_gt64120_init(i8259);
 889
 890     /* Southbridge */
 891
 892     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
 893         fprintf(stderr, "qemu: too many IDE bus\n");
 894         exit(1);
 895     }
 896
 897     for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
 898         index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
 899         if (index != -1)
 900             hd[i] = drives_table[index].bdrv;
 901         else
 902             hd[i] = NULL;
 903     }
 904
 905     piix4_devfn = piix4_init(pci_bus, 80);
 906     pci_piix4_ide_init(pci_bus, hd, piix4_devfn + 1, i8259);
 907     usb_uhci_piix4_init(pci_bus, piix4_devfn + 2);
 908     smbus = piix4_pm_init(pci_bus, piix4_devfn + 3, 0x1100, i8259[9]);
 909     eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
 910     for (i = 0; i < 8; i++) {
 911         /* TODO: Populate SPD eeprom data.  */
 912         smbus_eeprom_device_init(smbus, 0x50 + i, eeprom_buf + (i * 256));
 913     }
 914     pit = pit_init(0x40, i8259[0]);
 915     DMA_init(0);
 916
 917     /* Super I/O */
 918     i8042_init(i8259[1], i8259[12], 0x60);
 919     rtc_state = rtc_init(0x70, i8259[8]);
 920     if (serial_hds[0])
 921         serial_init(0x3f8, i8259[4], serial_hds[0]);
 922     if (serial_hds[1])
 923         serial_init(0x2f8, i8259[3], serial_hds[1]);
 924     if (parallel_hds[0])
 925         parallel_init(0x378, i8259[7], parallel_hds[0]);
 926     for(i = 0; i < MAX_FD; i++) {
 927         index = drive_get_index(IF_FLOPPY, 0, i);
 928        if (index != -1)
 929            fd[i] = drives_table[index].bdrv;
 930        else
 931            fd[i] = NULL;
 932     }
 933     floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd);
 934
 935     /* Sound card */
 936 #ifdef HAS_AUDIO
 937     audio_init(pci_bus);
 938 #endif
 939
 940     /* Network card */
 941     network_init(pci_bus);
 942
 943     /* Optional PCI video card */
 944     pci_cirrus_vga_init(pci_bus, ds, phys_ram_base + ram_size,
 945                         ram_size, vga_ram_size);
 946 }
 947
 948 QEMUMachine mips_malta_machine = {
 949     "malta",
 950     "MIPS Malta Core LV",
 951     mips_malta_init,
 952 };