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 "arch_init.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                                    DEVICE_NATIVE_ENDIAN);
 441
 442     cpu_register_physical_memory(base, 0x900, malta);
 443     /* 0xa00 is less than a page, so will still get the right offsets.  */
 444     cpu_register_physical_memory(base + 0xa00, 0x100000 - 0xa00, malta);
 445
 446     s->display = qemu_chr_open("fpga", "vc:320x200", malta_fpga_led_init);
 447
 448 #ifdef TARGET_WORDS_BIGENDIAN
 449     s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr, 1, 1);
 450 #else
 451     s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr, 1, 0);
 452 #endif
 453
 454     malta_fpga_reset(s);
 455     qemu_register_reset(malta_fpga_reset, s);
 456
 457     return s;
 458 }
 459
 460 /* Network support */
 461 static void network_init(void)
 462 {
 463     int i;
 464
 465     for(i = 0; i < nb_nics; i++) {
 466         NICInfo *nd = &nd_table[i];
 467         const char *default_devaddr = NULL;
 468
 469         if (i == 0 && (!nd->model || strcmp(nd->model, "pcnet") == 0))
 470             /* The malta board has a PCNet card using PCI SLOT 11 */
 471             default_devaddr = "0b";
 472
 473         pci_nic_init_nofail(nd, "pcnet", default_devaddr);
 474     }
 475 }
 476
 477 /* ROM and pseudo bootloader
 478
 479    The following code implements a very very simple bootloader. It first
 480    loads the registers a0 to a3 to the values expected by the OS, and
 481    then jump at the kernel address.
 482
 483    The bootloader should pass the locations of the kernel arguments and
 484    environment variables tables. Those tables contain the 32-bit address
 485    of NULL terminated strings. The environment variables table should be
 486    terminated by a NULL address.
 487
 488    For a simpler implementation, the number of kernel arguments is fixed
 489    to two (the name of the kernel and the command line), and the two
 490    tables are actually the same one.
 491
 492    The registers a0 to a3 should contain the following values:
 493      a0 - number of kernel arguments
 494      a1 - 32-bit address of the kernel arguments table
 495      a2 - 32-bit address of the environment variables table
 496      a3 - RAM size in bytes
 497 */
 498
 499 static void write_bootloader (CPUState *env, uint8_t *base,
 500                               int64_t kernel_entry)
 501 {
 502     uint32_t *p;
 503
 504     /* Small bootloader */
 505     p = (uint32_t *)base;
 506     stl_raw(p++, 0x0bf00160);                                      /* j 0x1fc00580 */
 507     stl_raw(p++, 0x00000000);                                      /* nop */
 508
 509     /* YAMON service vector */
 510     stl_raw(base + 0x500, 0xbfc00580);      /* start: */
 511     stl_raw(base + 0x504, 0xbfc0083c);      /* print_count: */
 512     stl_raw(base + 0x520, 0xbfc00580);      /* start: */
 513     stl_raw(base + 0x52c, 0xbfc00800);      /* flush_cache: */
 514     stl_raw(base + 0x534, 0xbfc00808);      /* print: */
 515     stl_raw(base + 0x538, 0xbfc00800);      /* reg_cpu_isr: */
 516     stl_raw(base + 0x53c, 0xbfc00800);      /* unred_cpu_isr: */
 517     stl_raw(base + 0x540, 0xbfc00800);      /* reg_ic_isr: */
 518     stl_raw(base + 0x544, 0xbfc00800);      /* unred_ic_isr: */
 519     stl_raw(base + 0x548, 0xbfc00800);      /* reg_esr: */
 520     stl_raw(base + 0x54c, 0xbfc00800);      /* unreg_esr: */
 521     stl_raw(base + 0x550, 0xbfc00800);      /* getchar: */
 522     stl_raw(base + 0x554, 0xbfc00800);      /* syscon_read: */
 523
 524
 525     /* Second part of the bootloader */
 526     p = (uint32_t *) (base + 0x580);
 527     stl_raw(p++, 0x24040002);                                      /* addiu a0, zero, 2 */
 528     stl_raw(p++, 0x3c1d0000 | (((ENVP_ADDR - 64) >> 16) & 0xffff)); /* lui sp, high(ENVP_ADDR) */
 529     stl_raw(p++, 0x37bd0000 | ((ENVP_ADDR - 64) & 0xffff));        /* ori sp, sp, low(ENVP_ADDR) */
 530     stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 531     stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a1, low(ENVP_ADDR) */
 532     stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 533     stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 534     stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));     /* lui a3, high(ram_size) */
 535     stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));  /* ori a3, a3, low(ram_size) */
 536
 537     /* Load BAR registers as done by YAMON */
 538     stl_raw(p++, 0x3c09b400);                                      /* lui t1, 0xb400 */
 539
 540 #ifdef TARGET_WORDS_BIGENDIAN
 541     stl_raw(p++, 0x3c08df00);                                      /* lui t0, 0xdf00 */
 542 #else
 543     stl_raw(p++, 0x340800df);                                      /* ori t0, r0, 0x00df */
 544 #endif
 545     stl_raw(p++, 0xad280068);                                      /* sw t0, 0x0068(t1) */
 546
 547     stl_raw(p++, 0x3c09bbe0);                                      /* lui t1, 0xbbe0 */
 548
 549 #ifdef TARGET_WORDS_BIGENDIAN
 550     stl_raw(p++, 0x3c08c000);                                      /* lui t0, 0xc000 */
 551 #else
 552     stl_raw(p++, 0x340800c0);                                      /* ori t0, r0, 0x00c0 */
 553 #endif
 554     stl_raw(p++, 0xad280048);                                      /* sw t0, 0x0048(t1) */
 555 #ifdef TARGET_WORDS_BIGENDIAN
 556     stl_raw(p++, 0x3c084000);                                      /* lui t0, 0x4000 */
 557 #else
 558     stl_raw(p++, 0x34080040);                                      /* ori t0, r0, 0x0040 */
 559 #endif
 560     stl_raw(p++, 0xad280050);                                      /* sw t0, 0x0050(t1) */
 561
 562 #ifdef TARGET_WORDS_BIGENDIAN
 563     stl_raw(p++, 0x3c088000);                                      /* lui t0, 0x8000 */
 564 #else
 565     stl_raw(p++, 0x34080080);                                      /* ori t0, r0, 0x0080 */
 566 #endif
 567     stl_raw(p++, 0xad280058);                                      /* sw t0, 0x0058(t1) */
 568 #ifdef TARGET_WORDS_BIGENDIAN
 569     stl_raw(p++, 0x3c083f00);                                      /* lui t0, 0x3f00 */
 570 #else
 571     stl_raw(p++, 0x3408003f);                                      /* ori t0, r0, 0x003f */
 572 #endif
 573     stl_raw(p++, 0xad280060);                                      /* sw t0, 0x0060(t1) */
 574
 575 #ifdef TARGET_WORDS_BIGENDIAN
 576     stl_raw(p++, 0x3c08c100);                                      /* lui t0, 0xc100 */
 577 #else
 578     stl_raw(p++, 0x340800c1);                                      /* ori t0, r0, 0x00c1 */
 579 #endif
 580     stl_raw(p++, 0xad280080);                                      /* sw t0, 0x0080(t1) */
 581 #ifdef TARGET_WORDS_BIGENDIAN
 582     stl_raw(p++, 0x3c085e00);                                      /* lui t0, 0x5e00 */
 583 #else
 584     stl_raw(p++, 0x3408005e);                                      /* ori t0, r0, 0x005e */
 585 #endif
 586     stl_raw(p++, 0xad280088);                                      /* sw t0, 0x0088(t1) */
 587
 588     /* Jump to kernel code */
 589     stl_raw(p++, 0x3c1f0000 | ((kernel_entry >> 16) & 0xffff));    /* lui ra, high(kernel_entry) */
 590     stl_raw(p++, 0x37ff0000 | (kernel_entry & 0xffff));            /* ori ra, ra, low(kernel_entry) */
 591     stl_raw(p++, 0x03e00008);                                      /* jr ra */
 592     stl_raw(p++, 0x00000000);                                      /* nop */
 593
 594     /* YAMON subroutines */
 595     p = (uint32_t *) (base + 0x800);
 596     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 597     stl_raw(p++, 0x24020000);                                     /* li v0,0 */
 598    /* 808 YAMON print */
 599     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 600     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 601     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 602     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 603     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 604     stl_raw(p++, 0x10800005);                                     /* beqz a0,834 */
 605     stl_raw(p++, 0x00000000);                                     /* nop */
 606     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 607     stl_raw(p++, 0x00000000);                                     /* nop */
 608     stl_raw(p++, 0x08000205);                                     /* j 814 */
 609     stl_raw(p++, 0x00000000);                                     /* nop */
 610     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 611     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 612     /* 0x83c YAMON print_count */
 613     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 614     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 615     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 616     stl_raw(p++, 0x00c06021);                                     /* move t4,a2 */
 617     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 618     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 619     stl_raw(p++, 0x00000000);                                     /* nop */
 620     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 621     stl_raw(p++, 0x258cffff);                                     /* addiu t4,t4,-1 */
 622     stl_raw(p++, 0x1580fffa);                                     /* bnez t4,84c */
 623     stl_raw(p++, 0x00000000);                                     /* nop */
 624     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 625     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 626     /* 0x870 */
 627     stl_raw(p++, 0x3c08b800);                                     /* lui t0,0xb400 */
 628     stl_raw(p++, 0x350803f8);                                     /* ori t0,t0,0x3f8 */
 629     stl_raw(p++, 0x91090005);                                     /* lbu t1,5(t0) */
 630     stl_raw(p++, 0x00000000);                                     /* nop */
 631     stl_raw(p++, 0x31290040);                                     /* andi t1,t1,0x40 */
 632     stl_raw(p++, 0x1120fffc);                                     /* beqz t1,878 <outch+0x8> */
 633     stl_raw(p++, 0x00000000);                                     /* nop */
 634     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 635     stl_raw(p++, 0xa1040000);                                     /* sb a0,0(t0) */
 636
 637 }
 638
 639 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
 640                                         const char *string, ...)
 641 {
 642     va_list ap;
 643     int32_t table_addr;
 644
 645     if (index >= ENVP_NB_ENTRIES)
 646         return;
 647
 648     if (string == NULL) {
 649         prom_buf[index] = 0;
 650         return;
 651     }
 652
 653     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
 654     prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
 655
 656     va_start(ap, string);
 657     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
 658     va_end(ap);
 659 }
 660
 661 /* Kernel */
 662 static int64_t load_kernel (void)
 663 {
 664     int64_t kernel_entry, kernel_high;
 665     long initrd_size;
 666     ram_addr_t initrd_offset;
 667     int big_endian;
 668     uint32_t *prom_buf;
 669     long prom_size;
 670     int prom_index = 0;
 671
 672 #ifdef TARGET_WORDS_BIGENDIAN
 673     big_endian = 1;
 674 #else
 675     big_endian = 0;
 676 #endif
 677
 678     if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
 679                  (uint64_t *)&kernel_entry, NULL, (uint64_t *)&kernel_high,
 680                  big_endian, ELF_MACHINE, 1) < 0) {
 681         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 682                 loaderparams.kernel_filename);
 683         exit(1);
 684     }
 685
 686     /* load initrd */
 687     initrd_size = 0;
 688     initrd_offset = 0;
 689     if (loaderparams.initrd_filename) {
 690         initrd_size = get_image_size (loaderparams.initrd_filename);
 691         if (initrd_size > 0) {
 692             initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
 693             if (initrd_offset + initrd_size > ram_size) {
 694                 fprintf(stderr,
 695                         "qemu: memory too small for initial ram disk '%s'\n",
 696                         loaderparams.initrd_filename);
 697                 exit(1);
 698             }
 699             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 700                                               initrd_offset,
 701                                               ram_size - initrd_offset);
 702         }
 703         if (initrd_size == (target_ulong) -1) {
 704             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 705                     loaderparams.initrd_filename);
 706             exit(1);
 707         }
 708     }
 709
 710     /* Setup prom parameters. */
 711     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 712     prom_buf = qemu_malloc(prom_size);
 713
 714     prom_set(prom_buf, prom_index++, "%s", loaderparams.kernel_filename);
 715     if (initrd_size > 0) {
 716         prom_set(prom_buf, prom_index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
 717                  cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
 718                  loaderparams.kernel_cmdline);
 719     } else {
 720         prom_set(prom_buf, prom_index++, "%s", loaderparams.kernel_cmdline);
 721     }
 722
 723     prom_set(prom_buf, prom_index++, "memsize");
 724     prom_set(prom_buf, prom_index++, "%i", loaderparams.ram_size);
 725     prom_set(prom_buf, prom_index++, "modetty0");
 726     prom_set(prom_buf, prom_index++, "38400n8r");
 727     prom_set(prom_buf, prom_index++, NULL);
 728
 729     rom_add_blob_fixed("prom", prom_buf, prom_size,
 730                        cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 731
 732     return kernel_entry;
 733 }
 734
 735 static void main_cpu_reset(void *opaque)
 736 {
 737     CPUState *env = opaque;
 738     cpu_reset(env);
 739
 740     /* The bootloader does not need to be rewritten as it is located in a
 741        read only location. The kernel location and the arguments table
 742        location does not change. */
 743     if (loaderparams.kernel_filename) {
 744         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 745     }
 746 }
 747
 748 static void cpu_request_exit(void *opaque, int irq, int level)
 749 {
 750     CPUState *env = cpu_single_env;
 751
 752     if (env && level) {
 753         cpu_exit(env);
 754     }
 755 }
 756
 757 static
 758 void mips_malta_init (ram_addr_t ram_size,
 759                       const char *boot_device,
 760                       const char *kernel_filename, const char *kernel_cmdline,
 761                       const char *initrd_filename, const char *cpu_model)
 762 {
 763     char *filename;
 764     ram_addr_t ram_offset;
 765     ram_addr_t bios_offset;
 766     target_long bios_size;
 767     int64_t kernel_entry;
 768     PCIBus *pci_bus;
 769     CPUState *env;
 770     qemu_irq *i8259;
 771     qemu_irq *cpu_exit_irq;
 772     int piix4_devfn;
 773     uint8_t *eeprom_buf;
 774     i2c_bus *smbus;
 775     int i;
 776     DriveInfo *dinfo;
 777     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 778     DriveInfo *fd[MAX_FD];
 779     int fl_idx = 0;
 780     int fl_sectors = 0;
 781     int be;
 782
 783     /* Make sure the first 3 serial ports are associated with a device. */
 784     for(i = 0; i < 3; i++) {
 785         if (!serial_hds[i]) {
 786             char label[32];
 787             snprintf(label, sizeof(label), "serial%d", i);
 788             serial_hds[i] = qemu_chr_open(label, "null", NULL);
 789         }
 790     }
 791
 792     /* init CPUs */
 793     if (cpu_model == NULL) {
 794 #ifdef TARGET_MIPS64
 795         cpu_model = "20Kc";
 796 #else
 797         cpu_model = "24Kf";
 798 #endif
 799     }
 800     env = cpu_init(cpu_model);
 801     if (!env) {
 802         fprintf(stderr, "Unable to find CPU definition\n");
 803         exit(1);
 804     }
 805     qemu_register_reset(main_cpu_reset, env);
 806
 807     /* allocate RAM */
 808     if (ram_size > (256 << 20)) {
 809         fprintf(stderr,
 810                 "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
 811                 ((unsigned int)ram_size / (1 << 20)));
 812         exit(1);
 813     }
 814     ram_offset = qemu_ram_alloc(NULL, "mips_malta.ram", ram_size);
 815     bios_offset = qemu_ram_alloc(NULL, "mips_malta.bios", BIOS_SIZE);
 816
 817
 818     cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
 819
 820     /* Map the bios at two physical locations, as on the real board. */
 821     cpu_register_physical_memory(0x1e000000LL,
 822                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 823     cpu_register_physical_memory(0x1fc00000LL,
 824                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 825
 826 #ifdef TARGET_WORDS_BIGENDIAN
 827     be = 1;
 828 #else
 829     be = 0;
 830 #endif
 831     /* FPGA */
 832     malta_fpga_init(0x1f000000LL, env->irq[2], serial_hds[2]);
 833
 834     /* Load firmware in flash / BIOS unless we boot directly into a kernel. */
 835     if (kernel_filename) {
 836         /* Write a small bootloader to the flash location. */
 837         loaderparams.ram_size = ram_size;
 838         loaderparams.kernel_filename = kernel_filename;
 839         loaderparams.kernel_cmdline = kernel_cmdline;
 840         loaderparams.initrd_filename = initrd_filename;
 841         kernel_entry = load_kernel();
 842         write_bootloader(env, qemu_get_ram_ptr(bios_offset), kernel_entry);
 843     } else {
 844         dinfo = drive_get(IF_PFLASH, 0, fl_idx);
 845         if (dinfo) {
 846             /* Load firmware from flash. */
 847             bios_size = 0x400000;
 848             fl_sectors = bios_size >> 16;
 849 #ifdef DEBUG_BOARD_INIT
 850             printf("Register parallel flash %d size " TARGET_FMT_lx " at "
 851                    "offset %08lx addr %08llx '%s' %x\n",
 852                    fl_idx, bios_size, bios_offset, 0x1e000000LL,
 853                    bdrv_get_device_name(dinfo->bdrv), fl_sectors);
 854 #endif
 855             pflash_cfi01_register(0x1e000000LL, bios_offset,
 856                                   dinfo->bdrv, 65536, fl_sectors,
 857                                   4, 0x0000, 0x0000, 0x0000, 0x0000, be);
 858             fl_idx++;
 859         } else {
 860             /* Load a BIOS image. */
 861             if (bios_name == NULL)
 862                 bios_name = BIOS_FILENAME;
 863             filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 864             if (filename) {
 865                 bios_size = load_image_targphys(filename, 0x1fc00000LL,
 866                                                 BIOS_SIZE);
 867                 qemu_free(filename);
 868             } else {
 869                 bios_size = -1;
 870             }
 871             if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
 872                 fprintf(stderr,
 873                         "qemu: Could not load MIPS bios '%s', and no -kernel argument was specified\n",
 874                         bios_name);
 875                 exit(1);
 876             }
 877         }
 878         /* In little endian mode the 32bit words in the bios are swapped,
 879            a neat trick which allows bi-endian firmware. */
 880 #ifndef TARGET_WORDS_BIGENDIAN
 881         {
 882             uint32_t *addr = qemu_get_ram_ptr(bios_offset);;
 883             uint32_t *end = addr + bios_size;
 884             while (addr < end) {
 885                 bswap32s(addr);
 886             }
 887         }
 888 #endif
 889     }
 890
 891     /* Board ID = 0x420 (Malta Board with CoreLV)
 892        XXX: theoretically 0x1e000010 should map to flash and 0x1fc00010 should
 893        map to the board ID. */
 894     stl_p(qemu_get_ram_ptr(bios_offset) + 0x10, 0x00000420);
 895
 896     /* Init internal devices */
 897     cpu_mips_irq_init_cpu(env);
 898     cpu_mips_clock_init(env);
 899
 900     /* Interrupt controller */
 901     /* The 8259 is attached to the MIPS CPU INT0 pin, ie interrupt 2 */
 902     i8259 = i8259_init(env->irq[2]);
 903
 904     /* Northbridge */
 905     pci_bus = gt64120_register(i8259);
 906
 907     /* Southbridge */
 908
 909     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
 910         fprintf(stderr, "qemu: too many IDE bus\n");
 911         exit(1);
 912     }
 913
 914     for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
 915         hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
 916     }
 917
 918     piix4_devfn = piix4_init(pci_bus, 80);
 919     isa_bus_irqs(i8259);
 920     pci_piix4_ide_init(pci_bus, hd, piix4_devfn + 1);
 921     usb_uhci_piix4_init(pci_bus, piix4_devfn + 2);
 922     smbus = piix4_pm_init(pci_bus, piix4_devfn + 3, 0x1100, isa_reserve_irq(9),
 923                           NULL, NULL, 0);
 924     eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
 925     for (i = 0; i < 8; i++) {
 926         /* TODO: Populate SPD eeprom data.  */
 927         DeviceState *eeprom;
 928         eeprom = qdev_create((BusState *)smbus, "smbus-eeprom");
 929         qdev_prop_set_uint8(eeprom, "address", 0x50 + i);
 930         qdev_prop_set_ptr(eeprom, "data", eeprom_buf + (i * 256));
 931         qdev_init_nofail(eeprom);
 932     }
 933     pit = pit_init(0x40, isa_reserve_irq(0));
 934     cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
 935     DMA_init(0, cpu_exit_irq);
 936
 937     /* Super I/O */
 938     isa_create_simple("i8042");
 939
 940     rtc_init(2000, NULL);
 941     serial_isa_init(0, serial_hds[0]);
 942     serial_isa_init(1, serial_hds[1]);
 943     if (parallel_hds[0])
 944         parallel_init(0, parallel_hds[0]);
 945     for(i = 0; i < MAX_FD; i++) {
 946         fd[i] = drive_get(IF_FLOPPY, 0, i);
 947     }
 948     fdctrl_init_isa(fd);
 949
 950     /* Sound card */
 951     audio_init(NULL, pci_bus);
 952
 953     /* Network card */
 954     network_init();
 955
 956     /* Optional PCI video card */
 957     if (cirrus_vga_enabled) {
 958         pci_cirrus_vga_init(pci_bus);
 959     } else if (vmsvga_enabled) {
 960         pci_vmsvga_init(pci_bus);
 961     } else if (std_vga_enabled) {
 962         pci_vga_init(pci_bus);
 963     }
 964 }
 965
 966 static QEMUMachine mips_malta_machine = {
 967     .name = "malta",
 968     .desc = "MIPS Malta Core LV",
 969     .init = mips_malta_init,
 970     .is_default = 1,
 971 };
 972
 973 static void mips_malta_machine_init(void)
 974 {
 975     qemu_register_machine(&mips_malta_machine);
 976 }
 977
 978 machine_init(mips_malta_machine_init);