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 "mips_cpudevs.h"
  35 #include "pci.h"
  36 #include "usb-uhci.h"
  37 #include "vmware_vga.h"
  38 #include "qemu-char.h"
  39 #include "sysemu.h"
  40 #include "audio/audio.h"
  41 #include "boards.h"
  42 #include "qemu-log.h"
  43 #include "mips-bios.h"
  44 #include "ide.h"
  45 #include "loader.h"
  46 #include "elf.h"
  47 #include "mc146818rtc.h"
  48 #include "blockdev.h"
  49
  50 //#define DEBUG_BOARD_INIT
  51
  52 #define ENVP_ADDR               0x80002000l
  53 #define ENVP_NB_ENTRIES         16
  54 #define ENVP_ENTRY_SIZE         256
  55
  56 #define MAX_IDE_BUS 2
  57
  58 typedef struct {
  59     uint32_t leds;
  60     uint32_t brk;
  61     uint32_t gpout;
  62     uint32_t i2cin;
  63     uint32_t i2coe;
  64     uint32_t i2cout;
  65     uint32_t i2csel;
  66     CharDriverState *display;
  67     char display_text[9];
  68     SerialState *uart;
  69 } MaltaFPGAState;
  70
  71 static PITState *pit;
  72
  73 static struct _loaderparams {
  74     int ram_size;
  75     const char *kernel_filename;
  76     const char *kernel_cmdline;
  77     const char *initrd_filename;
  78 } loaderparams;
  79
  80 /* Malta FPGA */
  81 static void malta_fpga_update_display(void *opaque)
  82 {
  83     char leds_text[9];
  84     int i;
  85     MaltaFPGAState *s = opaque;
  86
  87     for (i = 7 ; i >= 0 ; i--) {
  88         if (s->leds & (1 << i))
  89             leds_text[i] = '#';
  90         else
  91             leds_text[i] = ' ';
  92     }
  93     leds_text[8] = '\0';
  94
  95     qemu_chr_printf(s->display, "\e[H\n\n|\e[32m%-8.8s\e[00m|\r\n", leds_text);
  96     qemu_chr_printf(s->display, "\n\n\n\n|\e[31m%-8.8s\e[00m|", s->display_text);
  97 }
  98
  99 /*
 100  * EEPROM 24C01 / 24C02 emulation.
 101  *
 102  * Emulation for serial EEPROMs:
 103  * 24C01 - 1024 bit (128 x 8)
 104  * 24C02 - 2048 bit (256 x 8)
 105  *
 106  * Typical device names include Microchip 24C02SC or SGS Thomson ST24C02.
 107  */
 108
 109 //~ #define DEBUG
 110
 111 #if defined(DEBUG)
 112 #  define logout(fmt, ...) fprintf(stderr, "MALTA\t%-24s" fmt, __func__, ## __VA_ARGS__)
 113 #else
 114 #  define logout(fmt, ...) ((void)0)
 115 #endif
 116
 117 struct _eeprom24c0x_t {
 118   uint8_t tick;
 119   uint8_t address;
 120   uint8_t command;
 121   uint8_t ack;
 122   uint8_t scl;
 123   uint8_t sda;
 124   uint8_t data;
 125   //~ uint16_t size;
 126   uint8_t contents[256];
 127 };
 128
 129 typedef struct _eeprom24c0x_t eeprom24c0x_t;
 130
 131 static eeprom24c0x_t eeprom = {
 132     .contents = {
 133         /* 00000000: */ 0x80,0x08,0x04,0x0D,0x0A,0x01,0x40,0x00,
 134         /* 00000008: */ 0x01,0x75,0x54,0x00,0x82,0x08,0x00,0x01,
 135         /* 00000010: */ 0x8F,0x04,0x02,0x01,0x01,0x00,0x0E,0x00,
 136         /* 00000018: */ 0x00,0x00,0x00,0x14,0x0F,0x14,0x2D,0x40,
 137         /* 00000020: */ 0x15,0x08,0x15,0x08,0x00,0x00,0x00,0x00,
 138         /* 00000028: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 139         /* 00000030: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 140         /* 00000038: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x12,0xD0,
 141         /* 00000040: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 142         /* 00000048: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 143         /* 00000050: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 144         /* 00000058: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 145         /* 00000060: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 146         /* 00000068: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 147         /* 00000070: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 148         /* 00000078: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x64,0xF4,
 149     },
 150 };
 151
 152 static uint8_t eeprom24c0x_read(void)
 153 {
 154     logout("%u: scl = %u, sda = %u, data = 0x%02x\n",
 155         eeprom.tick, eeprom.scl, eeprom.sda, eeprom.data);
 156     return eeprom.sda;
 157 }
 158
 159 static void eeprom24c0x_write(int scl, int sda)
 160 {
 161     if (eeprom.scl && scl && (eeprom.sda != sda)) {
 162         logout("%u: scl = %u->%u, sda = %u->%u i2c %s\n",
 163                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda, sda ? "stop" : "start");
 164         if (!sda) {
 165             eeprom.tick = 1;
 166             eeprom.command = 0;
 167         }
 168     } else if (eeprom.tick == 0 && !eeprom.ack) {
 169         /* Waiting for start. */
 170         logout("%u: scl = %u->%u, sda = %u->%u wait for i2c start\n",
 171                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 172     } else if (!eeprom.scl && scl) {
 173         logout("%u: scl = %u->%u, sda = %u->%u trigger bit\n",
 174                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 175         if (eeprom.ack) {
 176             logout("\ti2c ack bit = 0\n");
 177             sda = 0;
 178             eeprom.ack = 0;
 179         } else if (eeprom.sda == sda) {
 180             uint8_t bit = (sda != 0);
 181             logout("\ti2c bit = %d\n", bit);
 182             if (eeprom.tick < 9) {
 183                 eeprom.command <<= 1;
 184                 eeprom.command += bit;
 185                 eeprom.tick++;
 186                 if (eeprom.tick == 9) {
 187                     logout("\tcommand 0x%04x, %s\n", eeprom.command, bit ? "read" : "write");
 188                     eeprom.ack = 1;
 189                 }
 190             } else if (eeprom.tick < 17) {
 191                 if (eeprom.command & 1) {
 192                     sda = ((eeprom.data & 0x80) != 0);
 193                 }
 194                 eeprom.address <<= 1;
 195                 eeprom.address += bit;
 196                 eeprom.tick++;
 197                 eeprom.data <<= 1;
 198                 if (eeprom.tick == 17) {
 199                     eeprom.data = eeprom.contents[eeprom.address];
 200                     logout("\taddress 0x%04x, data 0x%02x\n", eeprom.address, eeprom.data);
 201                     eeprom.ack = 1;
 202                     eeprom.tick = 0;
 203                 }
 204             } else if (eeprom.tick >= 17) {
 205                 sda = 0;
 206             }
 207         } else {
 208             logout("\tsda changed with raising scl\n");
 209         }
 210     } else {
 211         logout("%u: scl = %u->%u, sda = %u->%u\n", eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 212     }
 213     eeprom.scl = scl;
 214     eeprom.sda = sda;
 215 }
 216
 217 static uint32_t malta_fpga_readl(void *opaque, target_phys_addr_t addr)
 218 {
 219     MaltaFPGAState *s = opaque;
 220     uint32_t val = 0;
 221     uint32_t saddr;
 222
 223     saddr = (addr & 0xfffff);
 224
 225     switch (saddr) {
 226
 227     /* SWITCH Register */
 228     case 0x00200:
 229         val = 0x00000000;               /* All switches closed */
 230         break;
 231
 232     /* STATUS Register */
 233     case 0x00208:
 234 #ifdef TARGET_WORDS_BIGENDIAN
 235         val = 0x00000012;
 236 #else
 237         val = 0x00000010;
 238 #endif
 239         break;
 240
 241     /* JMPRS Register */
 242     case 0x00210:
 243         val = 0x00;
 244         break;
 245
 246     /* LEDBAR Register */
 247     case 0x00408:
 248         val = s->leds;
 249         break;
 250
 251     /* BRKRES Register */
 252     case 0x00508:
 253         val = s->brk;
 254         break;
 255
 256     /* UART Registers are handled directly by the serial device */
 257
 258     /* GPOUT Register */
 259     case 0x00a00:
 260         val = s->gpout;
 261         break;
 262
 263     /* XXX: implement a real I2C controller */
 264
 265     /* GPINP Register */
 266     case 0x00a08:
 267         /* IN = OUT until a real I2C control is implemented */
 268         if (s->i2csel)
 269             val = s->i2cout;
 270         else
 271             val = 0x00;
 272         break;
 273
 274     /* I2CINP Register */
 275     case 0x00b00:
 276         val = ((s->i2cin & ~1) | eeprom24c0x_read());
 277         break;
 278
 279     /* I2COE Register */
 280     case 0x00b08:
 281         val = s->i2coe;
 282         break;
 283
 284     /* I2COUT Register */
 285     case 0x00b10:
 286         val = s->i2cout;
 287         break;
 288
 289     /* I2CSEL Register */
 290     case 0x00b18:
 291         val = s->i2csel;
 292         break;
 293
 294     default:
 295 #if 0
 296         printf ("malta_fpga_read: Bad register offset 0x" TARGET_FMT_lx "\n",
 297                 addr);
 298 #endif
 299         break;
 300     }
 301     return val;
 302 }
 303
 304 static void malta_fpga_writel(void *opaque, target_phys_addr_t addr,
 305                               uint32_t val)
 306 {
 307     MaltaFPGAState *s = opaque;
 308     uint32_t saddr;
 309
 310     saddr = (addr & 0xfffff);
 311
 312     switch (saddr) {
 313
 314     /* SWITCH Register */
 315     case 0x00200:
 316         break;
 317
 318     /* JMPRS Register */
 319     case 0x00210:
 320         break;
 321
 322     /* LEDBAR Register */
 323     /* XXX: implement a 8-LED array */
 324     case 0x00408:
 325         s->leds = val & 0xff;
 326         break;
 327
 328     /* ASCIIWORD Register */
 329     case 0x00410:
 330         snprintf(s->display_text, 9, "%08X", val);
 331         malta_fpga_update_display(s);
 332         break;
 333
 334     /* ASCIIPOS0 to ASCIIPOS7 Registers */
 335     case 0x00418:
 336     case 0x00420:
 337     case 0x00428:
 338     case 0x00430:
 339     case 0x00438:
 340     case 0x00440:
 341     case 0x00448:
 342     case 0x00450:
 343         s->display_text[(saddr - 0x00418) >> 3] = (char) val;
 344         malta_fpga_update_display(s);
 345         break;
 346
 347     /* SOFTRES Register */
 348     case 0x00500:
 349         if (val == 0x42)
 350             qemu_system_reset_request ();
 351         break;
 352
 353     /* BRKRES Register */
 354     case 0x00508:
 355         s->brk = val & 0xff;
 356         break;
 357
 358     /* UART Registers are handled directly by the serial device */
 359
 360     /* GPOUT Register */
 361     case 0x00a00:
 362         s->gpout = val & 0xff;
 363         break;
 364
 365     /* I2COE Register */
 366     case 0x00b08:
 367         s->i2coe = val & 0x03;
 368         break;
 369
 370     /* I2COUT Register */
 371     case 0x00b10:
 372         eeprom24c0x_write(val & 0x02, val & 0x01);
 373         s->i2cout = val;
 374         break;
 375
 376     /* I2CSEL Register */
 377     case 0x00b18:
 378         s->i2csel = val & 0x01;
 379         break;
 380
 381     default:
 382 #if 0
 383         printf ("malta_fpga_write: Bad register offset 0x" TARGET_FMT_lx "\n",
 384                 addr);
 385 #endif
 386         break;
 387     }
 388 }
 389
 390 static CPUReadMemoryFunc * const malta_fpga_read[] = {
 391    malta_fpga_readl,
 392    malta_fpga_readl,
 393    malta_fpga_readl
 394 };
 395
 396 static CPUWriteMemoryFunc * const malta_fpga_write[] = {
 397    malta_fpga_writel,
 398    malta_fpga_writel,
 399    malta_fpga_writel
 400 };
 401
 402 static void malta_fpga_reset(void *opaque)
 403 {
 404     MaltaFPGAState *s = opaque;
 405
 406     s->leds   = 0x00;
 407     s->brk    = 0x0a;
 408     s->gpout  = 0x00;
 409     s->i2cin  = 0x3;
 410     s->i2coe  = 0x0;
 411     s->i2cout = 0x3;
 412     s->i2csel = 0x1;
 413
 414     s->display_text[8] = '\0';
 415     snprintf(s->display_text, 9, "        ");
 416 }
 417
 418 static void malta_fpga_led_init(CharDriverState *chr)
 419 {
 420     qemu_chr_printf(chr, "\e[HMalta LEDBAR\r\n");
 421     qemu_chr_printf(chr, "+--------+\r\n");
 422     qemu_chr_printf(chr, "+        +\r\n");
 423     qemu_chr_printf(chr, "+--------+\r\n");
 424     qemu_chr_printf(chr, "\n");
 425     qemu_chr_printf(chr, "Malta ASCII\r\n");
 426     qemu_chr_printf(chr, "+--------+\r\n");
 427     qemu_chr_printf(chr, "+        +\r\n");
 428     qemu_chr_printf(chr, "+--------+\r\n");
 429 }
 430
 431 static MaltaFPGAState *malta_fpga_init(target_phys_addr_t base, qemu_irq uart_irq, CharDriverState *uart_chr)
 432 {
 433     MaltaFPGAState *s;
 434     int malta;
 435
 436     s = (MaltaFPGAState *)qemu_mallocz(sizeof(MaltaFPGAState));
 437
 438     malta = cpu_register_io_memory(malta_fpga_read,
 439                                    malta_fpga_write, s);
 440
 441     cpu_register_physical_memory(base, 0x900, malta);
 442     /* 0xa00 is less than a page, so will still get the right offsets.  */
 443     cpu_register_physical_memory(base + 0xa00, 0x100000 - 0xa00, malta);
 444
 445     s->display = qemu_chr_open("fpga", "vc:320x200", malta_fpga_led_init);
 446
 447 #ifdef TARGET_WORDS_BIGENDIAN
 448     s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr, 1, 1);
 449 #else
 450     s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr, 1, 0);
 451 #endif
 452
 453     malta_fpga_reset(s);
 454     qemu_register_reset(malta_fpga_reset, s);
 455
 456     return s;
 457 }
 458
 459 /* Audio support */
 460 static void audio_init (PCIBus *pci_bus)
 461 {
 462     struct soundhw *c;
 463     int audio_enabled = 0;
 464
 465     for (c = soundhw; !audio_enabled && c->name; ++c) {
 466         audio_enabled = c->enabled;
 467     }
 468
 469     if (audio_enabled) {
 470         for (c = soundhw; c->name; ++c) {
 471             if (c->enabled) {
 472                 c->init.init_pci(pci_bus);
 473             }
 474         }
 475     }
 476 }
 477
 478 /* Network support */
 479 static void network_init(void)
 480 {
 481     int i;
 482
 483     for(i = 0; i < nb_nics; i++) {
 484         NICInfo *nd = &nd_table[i];
 485         const char *default_devaddr = NULL;
 486
 487         if (i == 0 && (!nd->model || strcmp(nd->model, "pcnet") == 0))
 488             /* The malta board has a PCNet card using PCI SLOT 11 */
 489             default_devaddr = "0b";
 490
 491         pci_nic_init_nofail(nd, "pcnet", default_devaddr);
 492     }
 493 }
 494
 495 /* ROM and pseudo bootloader
 496
 497    The following code implements a very very simple bootloader. It first
 498    loads the registers a0 to a3 to the values expected by the OS, and
 499    then jump at the kernel address.
 500
 501    The bootloader should pass the locations of the kernel arguments and
 502    environment variables tables. Those tables contain the 32-bit address
 503    of NULL terminated strings. The environment variables table should be
 504    terminated by a NULL address.
 505
 506    For a simpler implementation, the number of kernel arguments is fixed
 507    to two (the name of the kernel and the command line), and the two
 508    tables are actually the same one.
 509
 510    The registers a0 to a3 should contain the following values:
 511      a0 - number of kernel arguments
 512      a1 - 32-bit address of the kernel arguments table
 513      a2 - 32-bit address of the environment variables table
 514      a3 - RAM size in bytes
 515 */
 516
 517 static void write_bootloader (CPUState *env, uint8_t *base,
 518                               int64_t kernel_entry)
 519 {
 520     uint32_t *p;
 521
 522     /* Small bootloader */
 523     p = (uint32_t *)base;
 524     stl_raw(p++, 0x0bf00160);                                      /* j 0x1fc00580 */
 525     stl_raw(p++, 0x00000000);                                      /* nop */
 526
 527     /* YAMON service vector */
 528     stl_raw(base + 0x500, 0xbfc00580);      /* start: */
 529     stl_raw(base + 0x504, 0xbfc0083c);      /* print_count: */
 530     stl_raw(base + 0x520, 0xbfc00580);      /* start: */
 531     stl_raw(base + 0x52c, 0xbfc00800);      /* flush_cache: */
 532     stl_raw(base + 0x534, 0xbfc00808);      /* print: */
 533     stl_raw(base + 0x538, 0xbfc00800);      /* reg_cpu_isr: */
 534     stl_raw(base + 0x53c, 0xbfc00800);      /* unred_cpu_isr: */
 535     stl_raw(base + 0x540, 0xbfc00800);      /* reg_ic_isr: */
 536     stl_raw(base + 0x544, 0xbfc00800);      /* unred_ic_isr: */
 537     stl_raw(base + 0x548, 0xbfc00800);      /* reg_esr: */
 538     stl_raw(base + 0x54c, 0xbfc00800);      /* unreg_esr: */
 539     stl_raw(base + 0x550, 0xbfc00800);      /* getchar: */
 540     stl_raw(base + 0x554, 0xbfc00800);      /* syscon_read: */
 541
 542
 543     /* Second part of the bootloader */
 544     p = (uint32_t *) (base + 0x580);
 545     stl_raw(p++, 0x24040002);                                      /* addiu a0, zero, 2 */
 546     stl_raw(p++, 0x3c1d0000 | (((ENVP_ADDR - 64) >> 16) & 0xffff)); /* lui sp, high(ENVP_ADDR) */
 547     stl_raw(p++, 0x37bd0000 | ((ENVP_ADDR - 64) & 0xffff));        /* ori sp, sp, low(ENVP_ADDR) */
 548     stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 549     stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a1, low(ENVP_ADDR) */
 550     stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 551     stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 552     stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));     /* lui a3, high(ram_size) */
 553     stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));  /* ori a3, a3, low(ram_size) */
 554
 555     /* Load BAR registers as done by YAMON */
 556     stl_raw(p++, 0x3c09b400);                                      /* lui t1, 0xb400 */
 557
 558 #ifdef TARGET_WORDS_BIGENDIAN
 559     stl_raw(p++, 0x3c08df00);                                      /* lui t0, 0xdf00 */
 560 #else
 561     stl_raw(p++, 0x340800df);                                      /* ori t0, r0, 0x00df */
 562 #endif
 563     stl_raw(p++, 0xad280068);                                      /* sw t0, 0x0068(t1) */
 564
 565     stl_raw(p++, 0x3c09bbe0);                                      /* lui t1, 0xbbe0 */
 566
 567 #ifdef TARGET_WORDS_BIGENDIAN
 568     stl_raw(p++, 0x3c08c000);                                      /* lui t0, 0xc000 */
 569 #else
 570     stl_raw(p++, 0x340800c0);                                      /* ori t0, r0, 0x00c0 */
 571 #endif
 572     stl_raw(p++, 0xad280048);                                      /* sw t0, 0x0048(t1) */
 573 #ifdef TARGET_WORDS_BIGENDIAN
 574     stl_raw(p++, 0x3c084000);                                      /* lui t0, 0x4000 */
 575 #else
 576     stl_raw(p++, 0x34080040);                                      /* ori t0, r0, 0x0040 */
 577 #endif
 578     stl_raw(p++, 0xad280050);                                      /* sw t0, 0x0050(t1) */
 579
 580 #ifdef TARGET_WORDS_BIGENDIAN
 581     stl_raw(p++, 0x3c088000);                                      /* lui t0, 0x8000 */
 582 #else
 583     stl_raw(p++, 0x34080080);                                      /* ori t0, r0, 0x0080 */
 584 #endif
 585     stl_raw(p++, 0xad280058);                                      /* sw t0, 0x0058(t1) */
 586 #ifdef TARGET_WORDS_BIGENDIAN
 587     stl_raw(p++, 0x3c083f00);                                      /* lui t0, 0x3f00 */
 588 #else
 589     stl_raw(p++, 0x3408003f);                                      /* ori t0, r0, 0x003f */
 590 #endif
 591     stl_raw(p++, 0xad280060);                                      /* sw t0, 0x0060(t1) */
 592
 593 #ifdef TARGET_WORDS_BIGENDIAN
 594     stl_raw(p++, 0x3c08c100);                                      /* lui t0, 0xc100 */
 595 #else
 596     stl_raw(p++, 0x340800c1);                                      /* ori t0, r0, 0x00c1 */
 597 #endif
 598     stl_raw(p++, 0xad280080);                                      /* sw t0, 0x0080(t1) */
 599 #ifdef TARGET_WORDS_BIGENDIAN
 600     stl_raw(p++, 0x3c085e00);                                      /* lui t0, 0x5e00 */
 601 #else
 602     stl_raw(p++, 0x3408005e);                                      /* ori t0, r0, 0x005e */
 603 #endif
 604     stl_raw(p++, 0xad280088);                                      /* sw t0, 0x0088(t1) */
 605
 606     /* Jump to kernel code */
 607     stl_raw(p++, 0x3c1f0000 | ((kernel_entry >> 16) & 0xffff));    /* lui ra, high(kernel_entry) */
 608     stl_raw(p++, 0x37ff0000 | (kernel_entry & 0xffff));            /* ori ra, ra, low(kernel_entry) */
 609     stl_raw(p++, 0x03e00008);                                      /* jr ra */
 610     stl_raw(p++, 0x00000000);                                      /* nop */
 611
 612     /* YAMON subroutines */
 613     p = (uint32_t *) (base + 0x800);
 614     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 615     stl_raw(p++, 0x24020000);                                     /* li v0,0 */
 616    /* 808 YAMON print */
 617     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 618     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 619     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 620     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 621     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 622     stl_raw(p++, 0x10800005);                                     /* beqz a0,834 */
 623     stl_raw(p++, 0x00000000);                                     /* nop */
 624     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 625     stl_raw(p++, 0x00000000);                                     /* nop */
 626     stl_raw(p++, 0x08000205);                                     /* j 814 */
 627     stl_raw(p++, 0x00000000);                                     /* nop */
 628     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 629     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 630     /* 0x83c YAMON print_count */
 631     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 632     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 633     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 634     stl_raw(p++, 0x00c06021);                                     /* move t4,a2 */
 635     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 636     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 637     stl_raw(p++, 0x00000000);                                     /* nop */
 638     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 639     stl_raw(p++, 0x258cffff);                                     /* addiu t4,t4,-1 */
 640     stl_raw(p++, 0x1580fffa);                                     /* bnez t4,84c */
 641     stl_raw(p++, 0x00000000);                                     /* nop */
 642     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 643     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 644     /* 0x870 */
 645     stl_raw(p++, 0x3c08b800);                                     /* lui t0,0xb400 */
 646     stl_raw(p++, 0x350803f8);                                     /* ori t0,t0,0x3f8 */
 647     stl_raw(p++, 0x91090005);                                     /* lbu t1,5(t0) */
 648     stl_raw(p++, 0x00000000);                                     /* nop */
 649     stl_raw(p++, 0x31290040);                                     /* andi t1,t1,0x40 */
 650     stl_raw(p++, 0x1120fffc);                                     /* beqz t1,878 <outch+0x8> */
 651     stl_raw(p++, 0x00000000);                                     /* nop */
 652     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 653     stl_raw(p++, 0xa1040000);                                     /* sb a0,0(t0) */
 654
 655 }
 656
 657 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
 658                                         const char *string, ...)
 659 {
 660     va_list ap;
 661     int32_t table_addr;
 662
 663     if (index >= ENVP_NB_ENTRIES)
 664         return;
 665
 666     if (string == NULL) {
 667         prom_buf[index] = 0;
 668         return;
 669     }
 670
 671     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
 672     prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
 673
 674     va_start(ap, string);
 675     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
 676     va_end(ap);
 677 }
 678
 679 /* Kernel */
 680 static int64_t load_kernel (void)
 681 {
 682     int64_t kernel_entry, kernel_high;
 683     long initrd_size;
 684     ram_addr_t initrd_offset;
 685     int big_endian;
 686     uint32_t *prom_buf;
 687     long prom_size;
 688     int prom_index = 0;
 689
 690 #ifdef TARGET_WORDS_BIGENDIAN
 691     big_endian = 1;
 692 #else
 693     big_endian = 0;
 694 #endif
 695
 696     if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
 697                  (uint64_t *)&kernel_entry, NULL, (uint64_t *)&kernel_high,
 698                  big_endian, ELF_MACHINE, 1) < 0) {
 699         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 700                 loaderparams.kernel_filename);
 701         exit(1);
 702     }
 703
 704     /* load initrd */
 705     initrd_size = 0;
 706     initrd_offset = 0;
 707     if (loaderparams.initrd_filename) {
 708         initrd_size = get_image_size (loaderparams.initrd_filename);
 709         if (initrd_size > 0) {
 710             initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
 711             if (initrd_offset + initrd_size > ram_size) {
 712                 fprintf(stderr,
 713                         "qemu: memory too small for initial ram disk '%s'\n",
 714                         loaderparams.initrd_filename);
 715                 exit(1);
 716             }
 717             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 718                                               initrd_offset,
 719                                               ram_size - initrd_offset);
 720         }
 721         if (initrd_size == (target_ulong) -1) {
 722             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 723                     loaderparams.initrd_filename);
 724             exit(1);
 725         }
 726     }
 727
 728     /* Setup prom parameters. */
 729     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 730     prom_buf = qemu_malloc(prom_size);
 731
 732     prom_set(prom_buf, prom_index++, "%s", loaderparams.kernel_filename);
 733     if (initrd_size > 0) {
 734         prom_set(prom_buf, prom_index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
 735                  cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
 736                  loaderparams.kernel_cmdline);
 737     } else {
 738         prom_set(prom_buf, prom_index++, "%s", loaderparams.kernel_cmdline);
 739     }
 740
 741     prom_set(prom_buf, prom_index++, "memsize");
 742     prom_set(prom_buf, prom_index++, "%i", loaderparams.ram_size);
 743     prom_set(prom_buf, prom_index++, "modetty0");
 744     prom_set(prom_buf, prom_index++, "38400n8r");
 745     prom_set(prom_buf, prom_index++, NULL);
 746
 747     rom_add_blob_fixed("prom", prom_buf, prom_size,
 748                        cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 749
 750     return kernel_entry;
 751 }
 752
 753 static void main_cpu_reset(void *opaque)
 754 {
 755     CPUState *env = opaque;
 756     cpu_reset(env);
 757
 758     /* The bootloader does not need to be rewritten as it is located in a
 759        read only location. The kernel location and the arguments table
 760        location does not change. */
 761     if (loaderparams.kernel_filename) {
 762         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 763     }
 764 }
 765
 766 static void cpu_request_exit(void *opaque, int irq, int level)
 767 {
 768     CPUState *env = cpu_single_env;
 769
 770     if (env && level) {
 771         cpu_exit(env);
 772     }
 773 }
 774
 775 static
 776 void mips_malta_init (ram_addr_t ram_size,
 777                       const char *boot_device,
 778                       const char *kernel_filename, const char *kernel_cmdline,
 779                       const char *initrd_filename, const char *cpu_model)
 780 {
 781     char *filename;
 782     ram_addr_t ram_offset;
 783     ram_addr_t bios_offset;
 784     target_long bios_size;
 785     int64_t kernel_entry;
 786     PCIBus *pci_bus;
 787     CPUState *env;
 788     qemu_irq *i8259;
 789     qemu_irq *cpu_exit_irq;
 790     int piix4_devfn;
 791     uint8_t *eeprom_buf;
 792     i2c_bus *smbus;
 793     int i;
 794     DriveInfo *dinfo;
 795     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 796     DriveInfo *fd[MAX_FD];
 797     int fl_idx = 0;
 798     int fl_sectors = 0;
 799     int be;
 800
 801     /* Make sure the first 3 serial ports are associated with a device. */
 802     for(i = 0; i < 3; i++) {
 803         if (!serial_hds[i]) {
 804             char label[32];
 805             snprintf(label, sizeof(label), "serial%d", i);
 806             serial_hds[i] = qemu_chr_open(label, "null", NULL);
 807         }
 808     }
 809
 810     /* init CPUs */
 811     if (cpu_model == NULL) {
 812 #ifdef TARGET_MIPS64
 813         cpu_model = "20Kc";
 814 #else
 815         cpu_model = "24Kf";
 816 #endif
 817     }
 818     env = cpu_init(cpu_model);
 819     if (!env) {
 820         fprintf(stderr, "Unable to find CPU definition\n");
 821         exit(1);
 822     }
 823     qemu_register_reset(main_cpu_reset, env);
 824
 825     /* allocate RAM */
 826     if (ram_size > (256 << 20)) {
 827         fprintf(stderr,
 828                 "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
 829                 ((unsigned int)ram_size / (1 << 20)));
 830         exit(1);
 831     }
 832     ram_offset = qemu_ram_alloc(NULL, "mips_malta.ram", ram_size);
 833     bios_offset = qemu_ram_alloc(NULL, "mips_malta.bios", BIOS_SIZE);
 834
 835
 836     cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
 837
 838     /* Map the bios at two physical locations, as on the real board. */
 839     cpu_register_physical_memory(0x1e000000LL,
 840                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 841     cpu_register_physical_memory(0x1fc00000LL,
 842                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 843
 844 #ifdef TARGET_WORDS_BIGENDIAN
 845     be = 1;
 846 #else
 847     be = 0;
 848 #endif
 849     /* FPGA */
 850     malta_fpga_init(0x1f000000LL, env->irq[2], serial_hds[2]);
 851
 852     /* Load firmware in flash / BIOS unless we boot directly into a kernel. */
 853     if (kernel_filename) {
 854         /* Write a small bootloader to the flash location. */
 855         loaderparams.ram_size = ram_size;
 856         loaderparams.kernel_filename = kernel_filename;
 857         loaderparams.kernel_cmdline = kernel_cmdline;
 858         loaderparams.initrd_filename = initrd_filename;
 859         kernel_entry = load_kernel();
 860         write_bootloader(env, qemu_get_ram_ptr(bios_offset), kernel_entry);
 861     } else {
 862         dinfo = drive_get(IF_PFLASH, 0, fl_idx);
 863         if (dinfo) {
 864             /* Load firmware from flash. */
 865             bios_size = 0x400000;
 866             fl_sectors = bios_size >> 16;
 867 #ifdef DEBUG_BOARD_INIT
 868             printf("Register parallel flash %d size " TARGET_FMT_lx " at "
 869                    "offset %08lx addr %08llx '%s' %x\n",
 870                    fl_idx, bios_size, bios_offset, 0x1e000000LL,
 871                    bdrv_get_device_name(dinfo->bdrv), fl_sectors);
 872 #endif
 873             pflash_cfi01_register(0x1e000000LL, bios_offset,
 874                                   dinfo->bdrv, 65536, fl_sectors,
 875                                   4, 0x0000, 0x0000, 0x0000, 0x0000, be);
 876             fl_idx++;
 877         } else {
 878             /* Load a BIOS image. */
 879             if (bios_name == NULL)
 880                 bios_name = BIOS_FILENAME;
 881             filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 882             if (filename) {
 883                 bios_size = load_image_targphys(filename, 0x1fc00000LL,
 884                                                 BIOS_SIZE);
 885                 qemu_free(filename);
 886             } else {
 887                 bios_size = -1;
 888             }
 889             if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
 890                 fprintf(stderr,
 891                         "qemu: Could not load MIPS bios '%s', and no -kernel argument was specified\n",
 892                         bios_name);
 893                 exit(1);
 894             }
 895         }
 896         /* In little endian mode the 32bit words in the bios are swapped,
 897            a neat trick which allows bi-endian firmware. */
 898 #ifndef TARGET_WORDS_BIGENDIAN
 899         {
 900             uint32_t *addr = qemu_get_ram_ptr(bios_offset);;
 901             uint32_t *end = addr + bios_size;
 902             while (addr < end) {
 903                 bswap32s(addr);
 904             }
 905         }
 906 #endif
 907     }
 908
 909     /* Board ID = 0x420 (Malta Board with CoreLV)
 910        XXX: theoretically 0x1e000010 should map to flash and 0x1fc00010 should
 911        map to the board ID. */
 912     stl_phys(0x1fc00010LL, 0x00000420);
 913
 914     /* Init internal devices */
 915     cpu_mips_irq_init_cpu(env);
 916     cpu_mips_clock_init(env);
 917
 918     /* Interrupt controller */
 919     /* The 8259 is attached to the MIPS CPU INT0 pin, ie interrupt 2 */
 920     i8259 = i8259_init(env->irq[2]);
 921
 922     /* Northbridge */
 923     pci_bus = pci_gt64120_init(i8259);
 924
 925     /* Southbridge */
 926
 927     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
 928         fprintf(stderr, "qemu: too many IDE bus\n");
 929         exit(1);
 930     }
 931
 932     for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
 933         hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
 934     }
 935
 936     piix4_devfn = piix4_init(pci_bus, 80);
 937     isa_bus_irqs(i8259);
 938     pci_piix4_ide_init(pci_bus, hd, piix4_devfn + 1);
 939     usb_uhci_piix4_init(pci_bus, piix4_devfn + 2);
 940     smbus = piix4_pm_init(pci_bus, piix4_devfn + 3, 0x1100, isa_reserve_irq(9),
 941                           NULL, NULL, 0);
 942     eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
 943     for (i = 0; i < 8; i++) {
 944         /* TODO: Populate SPD eeprom data.  */
 945         DeviceState *eeprom;
 946         eeprom = qdev_create((BusState *)smbus, "smbus-eeprom");
 947         qdev_prop_set_uint8(eeprom, "address", 0x50 + i);
 948         qdev_prop_set_ptr(eeprom, "data", eeprom_buf + (i * 256));
 949         qdev_init_nofail(eeprom);
 950     }
 951     pit = pit_init(0x40, isa_reserve_irq(0));
 952     cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
 953     DMA_init(0, cpu_exit_irq);
 954
 955     /* Super I/O */
 956     isa_create_simple("i8042");
 957
 958     rtc_init(2000, NULL);
 959     serial_isa_init(0, serial_hds[0]);
 960     serial_isa_init(1, serial_hds[1]);
 961     if (parallel_hds[0])
 962         parallel_init(0, parallel_hds[0]);
 963     for(i = 0; i < MAX_FD; i++) {
 964         fd[i] = drive_get(IF_FLOPPY, 0, i);
 965     }
 966     fdctrl_init_isa(fd);
 967
 968     /* Sound card */
 969     audio_init(pci_bus);
 970
 971     /* Network card */
 972     network_init();
 973
 974     /* Optional PCI video card */
 975     if (cirrus_vga_enabled) {
 976         pci_cirrus_vga_init(pci_bus);
 977     } else if (vmsvga_enabled) {
 978         pci_vmsvga_init(pci_bus);
 979     } else if (std_vga_enabled) {
 980         pci_vga_init(pci_bus);
 981     }
 982 }
 983
 984 static QEMUMachine mips_malta_machine = {
 985     .name = "malta",
 986     .desc = "MIPS Malta Core LV",
 987     .init = mips_malta_init,
 988     .is_default = 1,
 989 };
 990
 991 static void mips_malta_machine_init(void)
 992 {
 993     qemu_register_machine(&mips_malta_machine);
 994 }
 995
 996 machine_init(mips_malta_machine_init);