1/* 2 * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de> 3 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com> 4 * 5 * Copyright 2010-2012 Freescale Semiconductor, Inc. 6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com) 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11#include <common.h> 12#include <asm-offsets.h> 13#include <config.h> 14#include <timestamp.h> 15#include "version.h" 16#include <asm/cache.h> 17 18#ifndef CONFIG_IDENT_STRING 19#define CONFIG_IDENT_STRING "" 20#endif 21 22#define _START _start 23#define _FAULT _fault 24 25#define SAVE_ALL \ 26 move.w #0x2700,%sr; /* disable intrs */ \ 27 subl #60,%sp; /* space for 15 regs */ \ 28 moveml %d0-%d7/%a0-%a6,%sp@; 29 30#define RESTORE_ALL \ 31 moveml %sp@,%d0-%d7/%a0-%a6; \ 32 addl #60,%sp; /* space for 15 regs */ \ 33 rte; 34 35#if defined(CONFIG_SERIAL_BOOT) 36#define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) 37#define ASM_DRAMINIT_N (asm_dram_init - CONFIG_SYS_TEXT_BASE) 38#define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) 39#endif 40 41.text 42 43/* 44 * Vector table. This is used for initial platform startup. 45 * These vectors are to catch any un-intended traps. 46 */ 47_vectors: 48#if defined(CONFIG_SERIAL_BOOT) 49 50INITSP: .long 0 /* Initial SP */ 51#ifdef CONFIG_CF_SBF 52INITPC: .long ASM_DRAMINIT /* Initial PC */ 53#endif 54#ifdef CONFIG_SYS_NAND_BOOT 55INITPC: .long ASM_DRAMINIT_N /* Initial PC */ 56#endif 57 58#else 59 60INITSP: .long 0 /* Initial SP */ 61INITPC: .long _START /* Initial PC */ 62 63#endif 64 65vector02: .long _FAULT /* Access Error */ 66vector03: .long _FAULT /* Address Error */ 67vector04: .long _FAULT /* Illegal Instruction */ 68vector05: .long _FAULT /* Reserved */ 69vector06: .long _FAULT /* Reserved */ 70vector07: .long _FAULT /* Reserved */ 71vector08: .long _FAULT /* Privilege Violation */ 72vector09: .long _FAULT /* Trace */ 73vector0A: .long _FAULT /* Unimplemented A-Line */ 74vector0B: .long _FAULT /* Unimplemented F-Line */ 75vector0C: .long _FAULT /* Debug Interrupt */ 76vector0D: .long _FAULT /* Reserved */ 77vector0E: .long _FAULT /* Format Error */ 78vector0F: .long _FAULT /* Unitialized Int. */ 79 80/* Reserved */ 81vector10_17: 82.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 83 84vector18: .long _FAULT /* Spurious Interrupt */ 85vector19: .long _FAULT /* Autovector Level 1 */ 86vector1A: .long _FAULT /* Autovector Level 2 */ 87vector1B: .long _FAULT /* Autovector Level 3 */ 88vector1C: .long _FAULT /* Autovector Level 4 */ 89vector1D: .long _FAULT /* Autovector Level 5 */ 90vector1E: .long _FAULT /* Autovector Level 6 */ 91vector1F: .long _FAULT /* Autovector Level 7 */ 92 93#if !defined(CONFIG_SERIAL_BOOT) 94 95/* TRAP #0 - #15 */ 96vector20_2F: 97.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 98.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 99 100/* Reserved */ 101vector30_3F: 102.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 103.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 104 105vector64_127: 106.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 107.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 108.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 109.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 110.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 111.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 112.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 113.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 114 115vector128_191: 116.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 117.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 118.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 119.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 120.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 121.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 122.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 123.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 124 125vector192_255: 126.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 127.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 128.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 129.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 130.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 131.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 132.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 133.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 134#endif 135 136#if defined(CONFIG_SERIAL_BOOT) 137 /* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */ 138asm_sbf_img_hdr: 139 .long 0x00000000 /* checksum, not yet implemented */ 140 .long 0x00040000 /* image length */ 141 .long CONFIG_SYS_TEXT_BASE /* image to be relocated at */ 142 143asm_dram_init: 144 move.w #0x2700,%sr /* Mask off Interrupt */ 145 146#ifdef CONFIG_SYS_NAND_BOOT 147 /* for assembly stack */ 148 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 149 movec %d0, %RAMBAR1 150 151 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp 152 clr.l %sp@- 153#endif 154 155#ifdef CONFIG_CF_SBF 156 move.l #CONFIG_SYS_INIT_RAM_ADDR, %d0 157 movec %d0, %VBR 158 159 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 160 movec %d0, %RAMBAR1 161 162 /* initialize general use internal ram */ 163 move.l #0, %d0 164 move.l #(ICACHE_STATUS), %a1 /* icache */ 165 move.l #(DCACHE_STATUS), %a2 /* dcache */ 166 move.l %d0, (%a1) 167 move.l %d0, (%a2) 168 169 /* invalidate and disable cache */ 170 move.l #(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0 171 movec %d0, %CACR /* Invalidate cache */ 172 move.l #0, %d0 173 movec %d0, %ACR0 174 movec %d0, %ACR1 175 movec %d0, %ACR2 176 movec %d0, %ACR3 177 178 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp 179 clr.l %sp@- 180 181 /* Must disable global address */ 182 move.l #0xFC008000, %a1 183 move.l #(CONFIG_SYS_CS0_BASE), (%a1) 184 move.l #0xFC008008, %a1 185 move.l #(CONFIG_SYS_CS0_CTRL), (%a1) 186 move.l #0xFC008004, %a1 187 move.l #(CONFIG_SYS_CS0_MASK), (%a1) 188#endif /* CONFIG_CF_SBF */ 189 190#ifdef CONFIG_MCF5441x 191 /* TC: enable all peripherals, 192 in the future only enable certain peripherals */ 193 move.l #0xFC04002D, %a1 194 195#if defined(CONFIG_CF_SBF) 196 move.b #23, (%a1) /* dspi */ 197#endif 198 move.b #46, (%a1) /* DDR */ 199 200 /* slew settings */ 201 move.l #0xEC094060, %a1 202 move.b #0, (%a1) 203 204 /* use vco instead of cpu*2 clock for ddr clock */ 205 move.l #0xEC09001A, %a1 206 move.w #0xE01D, (%a1) 207 208 /* DDR settings */ 209 move.l #0xFC0B8180, %a1 210 move.l #0x00000000, (%a1) 211 move.l #0x40000000, (%a1) 212 213 move.l #0xFC0B81AC, %a1 214 move.l #0x01030203, (%a1) 215 216 move.l #0xFC0B8000, %a1 217 move.l #0x01010101, (%a1)+ /* 0x00 */ 218 move.l #0x00000101, (%a1)+ /* 0x04 */ 219 move.l #0x01010100, (%a1)+ /* 0x08 */ 220 move.l #0x01010000, (%a1)+ /* 0x0C */ 221 move.l #0x00010101, (%a1)+ /* 0x10 */ 222 move.l #0xFC0B8018, %a1 223 move.l #0x00010100, (%a1)+ /* 0x18 */ 224 move.l #0x00000001, (%a1)+ /* 0x1C */ 225 move.l #0x01000001, (%a1)+ /* 0x20 */ 226 move.l #0x00000100, (%a1)+ /* 0x24 */ 227 move.l #0x00010001, (%a1)+ /* 0x28 */ 228 move.l #0x00000200, (%a1)+ /* 0x2C */ 229 move.l #0x01000002, (%a1)+ /* 0x30 */ 230 move.l #0x00000000, (%a1)+ /* 0x34 */ 231 move.l #0x00000100, (%a1)+ /* 0x38 */ 232 move.l #0x02000100, (%a1)+ /* 0x3C */ 233 move.l #0x02000407, (%a1)+ /* 0x40 */ 234 move.l #0x02030007, (%a1)+ /* 0x44 */ 235 move.l #0x02000100, (%a1)+ /* 0x48 */ 236 move.l #0x0A030203, (%a1)+ /* 0x4C */ 237 move.l #0x00020708, (%a1)+ /* 0x50 */ 238 move.l #0x00050008, (%a1)+ /* 0x54 */ 239 move.l #0x04030002, (%a1)+ /* 0x58 */ 240 move.l #0x00000004, (%a1)+ /* 0x5C */ 241 move.l #0x020A0000, (%a1)+ /* 0x60 */ 242 move.l #0x0C00000E, (%a1)+ /* 0x64 */ 243 move.l #0x00002004, (%a1)+ /* 0x68 */ 244 move.l #0x00000000, (%a1)+ /* 0x6C */ 245 move.l #0x00100010, (%a1)+ /* 0x70 */ 246 move.l #0x00100010, (%a1)+ /* 0x74 */ 247 move.l #0x00000000, (%a1)+ /* 0x78 */ 248 move.l #0x07990000, (%a1)+ /* 0x7C */ 249 move.l #0xFC0B80A0, %a1 250 move.l #0x00000000, (%a1)+ /* 0xA0 */ 251 move.l #0x00C80064, (%a1)+ /* 0xA4 */ 252 move.l #0x44520002, (%a1)+ /* 0xA8 */ 253 move.l #0x00C80023, (%a1)+ /* 0xAC */ 254 move.l #0xFC0B80B4, %a1 255 move.l #0x0000C350, (%a1) /* 0xB4 */ 256 move.l #0xFC0B80E0, %a1 257 move.l #0x04000000, (%a1)+ /* 0xE0 */ 258 move.l #0x03000304, (%a1)+ /* 0xE4 */ 259 move.l #0x40040000, (%a1)+ /* 0xE8 */ 260 move.l #0xC0004004, (%a1)+ /* 0xEC */ 261 move.l #0x0642C000, (%a1)+ /* 0xF0 */ 262 move.l #0x00000642, (%a1)+ /* 0xF4 */ 263 move.l #0xFC0B8024, %a1 264 tpf 265 move.l #0x01000100, (%a1) /* 0x24 */ 266 267 move.l #0x2000, %d1 268 jsr asm_delay 269#endif /* CONFIG_MCF5441x */ 270 271#ifdef CONFIG_MCF5445x 272 /* Dram Initialization a1, a2, and d0 */ 273 /* mscr sdram */ 274 move.l #0xFC0A4074, %a1 275 move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1) 276 nop 277 278 /* SDRAM Chip 0 and 1 */ 279 move.l #0xFC0B8110, %a1 280 move.l #0xFC0B8114, %a2 281 282 /* calculate the size */ 283 move.l #0x13, %d1 284 move.l #(CONFIG_SYS_SDRAM_SIZE), %d2 285#ifdef CONFIG_SYS_SDRAM_BASE1 286 lsr.l #1, %d2 287#endif 288 289dramsz_loop: 290 lsr.l #1, %d2 291 add.l #1, %d1 292 cmp.l #1, %d2 293 bne dramsz_loop 294#ifdef CONFIG_SYS_NAND_BOOT 295 beq asm_nand_chk_status 296#endif 297 /* SDRAM Chip 0 and 1 */ 298 move.l #(CONFIG_SYS_SDRAM_BASE), (%a1) 299 or.l %d1, (%a1) 300#ifdef CONFIG_SYS_SDRAM_BASE1 301 move.l #(CONFIG_SYS_SDRAM_BASE1), (%a2) 302 or.l %d1, (%a2) 303#endif 304 nop 305 306 /* dram cfg1 and cfg2 */ 307 move.l #0xFC0B8008, %a1 308 move.l #(CONFIG_SYS_SDRAM_CFG1), (%a1) 309 nop 310 move.l #0xFC0B800C, %a2 311 move.l #(CONFIG_SYS_SDRAM_CFG2), (%a2) 312 nop 313 314 move.l #0xFC0B8000, %a1 /* Mode */ 315 move.l #0xFC0B8004, %a2 /* Ctrl */ 316 317 /* Issue PALL */ 318 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) 319 nop 320 321#ifdef CONFIG_M54455EVB 322 /* Issue LEMR */ 323 move.l #(CONFIG_SYS_SDRAM_EMOD + 0x408), (%a1) 324 nop 325 move.l #(CONFIG_SYS_SDRAM_MODE + 0x300), (%a1) 326 nop 327#endif 328 329 move.l #1000, %d1 330 jsr asm_delay 331 332 /* Issue PALL */ 333 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) 334 nop 335 336 /* Perform two refresh cycles */ 337 move.l #(CONFIG_SYS_SDRAM_CTRL + 4), %d0 338 nop 339 move.l %d0, (%a2) 340 move.l %d0, (%a2) 341 nop 342 343#ifdef CONFIG_M54455EVB 344 move.l #(CONFIG_SYS_SDRAM_MODE + 0x200), (%a1) 345 nop 346#elif defined(CONFIG_M54451EVB) 347 /* Issue LEMR */ 348 move.l #(CONFIG_SYS_SDRAM_MODE), (%a1) 349 nop 350 move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1) 351#endif 352 353 move.l #500, %d1 354 jsr asm_delay 355 356 move.l #(CONFIG_SYS_SDRAM_CTRL), %d1 357 and.l #0x7FFFFFFF, %d1 358#ifdef CONFIG_M54455EVB 359 or.l #0x10000C00, %d1 360#elif defined(CONFIG_M54451EVB) 361 or.l #0x10000C00, %d1 362#endif 363 move.l %d1, (%a2) 364 nop 365 366 move.l #2000, %d1 367 jsr asm_delay 368#endif /* CONFIG_MCF5445x */ 369 370#ifdef CONFIG_CF_SBF 371 /* 372 * DSPI Initialization 373 * a0 - general, sram - 0x80008000 - 32, see M54455EVB.h 374 * a1 - dspi status 375 * a2 - dtfr 376 * a3 - drfr 377 * a4 - Dst addr 378 */ 379 /* Enable pins for DSPI mode - chip-selects are enabled later */ 380asm_dspi_init: 381#ifdef CONFIG_MCF5441x 382 move.l #0xEC09404E, %a1 383 move.l #0xEC09404F, %a2 384 move.b #0xFF, (%a1) 385 move.b #0x80, (%a2) 386#endif 387 388#ifdef CONFIG_MCF5445x 389 move.l #0xFC0A4063, %a0 390 move.b #0x7F, (%a0) 391#endif 392 /* Configure DSPI module */ 393 move.l #0xFC05C000, %a0 394 move.l #0x80FF0C00, (%a0) /* Master, clear TX/RX FIFO */ 395 396 move.l #0xFC05C00C, %a0 397#ifdef CONFIG_MCF5441x 398 move.l #0x3E000016, (%a0) 399#endif 400#ifdef CONFIG_MCF5445x 401 move.l #0x3E000011, (%a0) 402#endif 403 404 move.l #0xFC05C034, %a2 /* dtfr */ 405 move.l #0xFC05C03B, %a3 /* drfr */ 406 407 move.l #(ASM_SBF_IMG_HDR + 4), %a1 408 move.l (%a1)+, %d5 409 move.l (%a1), %a4 410 411 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0 412 move.l #(CONFIG_SYS_SBFHDR_SIZE), %d4 413 414 move.l #0xFC05C02C, %a1 /* dspi status */ 415 416 /* Issue commands and address */ 417 move.l #0x8002000B, %d2 /* Fast Read Cmd */ 418 jsr asm_dspi_wr_status 419 jsr asm_dspi_rd_status 420 421 move.l #0x80020000, %d2 /* Address byte 2 */ 422 jsr asm_dspi_wr_status 423 jsr asm_dspi_rd_status 424 425 move.l #0x80020000, %d2 /* Address byte 1 */ 426 jsr asm_dspi_wr_status 427 jsr asm_dspi_rd_status 428 429 move.l #0x80020000, %d2 /* Address byte 0 */ 430 jsr asm_dspi_wr_status 431 jsr asm_dspi_rd_status 432 433 move.l #0x80020000, %d2 /* Dummy Wr and Rd */ 434 jsr asm_dspi_wr_status 435 jsr asm_dspi_rd_status 436 437 /* Transfer serial boot header to sram */ 438asm_dspi_rd_loop1: 439 move.l #0x80020000, %d2 440 jsr asm_dspi_wr_status 441 jsr asm_dspi_rd_status 442 443 move.b %d1, (%a0) /* read, copy to dst */ 444 445 add.l #1, %a0 /* inc dst by 1 */ 446 sub.l #1, %d4 /* dec cnt by 1 */ 447 bne asm_dspi_rd_loop1 448 449 /* Transfer u-boot from serial flash to memory */ 450asm_dspi_rd_loop2: 451 move.l #0x80020000, %d2 452 jsr asm_dspi_wr_status 453 jsr asm_dspi_rd_status 454 455 move.b %d1, (%a4) /* read, copy to dst */ 456 457 add.l #1, %a4 /* inc dst by 1 */ 458 sub.l #1, %d5 /* dec cnt by 1 */ 459 bne asm_dspi_rd_loop2 460 461 move.l #0x00020000, %d2 /* Terminate */ 462 jsr asm_dspi_wr_status 463 jsr asm_dspi_rd_status 464 465 /* jump to memory and execute */ 466 move.l #(CONFIG_SYS_TEXT_BASE + 0x400), %a0 467 jmp (%a0) 468 469asm_dspi_wr_status: 470 move.l (%a1), %d0 /* status */ 471 and.l #0x0000F000, %d0 472 cmp.l #0x00003000, %d0 473 bgt asm_dspi_wr_status 474 475 move.l %d2, (%a2) 476 rts 477 478asm_dspi_rd_status: 479 move.l (%a1), %d0 /* status */ 480 and.l #0x000000F0, %d0 481 lsr.l #4, %d0 482 cmp.l #0, %d0 483 beq asm_dspi_rd_status 484 485 move.b (%a3), %d1 486 rts 487#endif /* CONFIG_CF_SBF */ 488 489#ifdef CONFIG_SYS_NAND_BOOT 490 /* copy 4 boot pages to dram as soon as possible */ 491 /* each page is 996 bytes (1056 total with 60 ECC bytes */ 492 move.l #0x00000000, %a1 /* src */ 493 move.l #CONFIG_SYS_TEXT_BASE, %a2 /* dst */ 494 move.l #0x3E0, %d0 /* sz in long */ 495 496asm_boot_nand_copy: 497 move.l (%a1)+, (%a2)+ 498 subq.l #1, %d0 499 bne asm_boot_nand_copy 500 501 /* jump to memory and execute */ 502 move.l #(asm_nand_init), %a0 503 jmp (%a0) 504 505asm_nand_init: 506 /* exit nand boot-mode */ 507 move.l #0xFC0FFF30, %a1 508 or.l #0x00000040, %d1 509 move.l %d1, (%a1) 510 511 /* initialize general use internal ram */ 512 move.l #0, %d0 513 move.l #(CACR_STATUS), %a1 /* CACR */ 514 move.l #(ICACHE_STATUS), %a2 /* icache */ 515 move.l #(DCACHE_STATUS), %a3 /* dcache */ 516 move.l %d0, (%a1) 517 move.l %d0, (%a2) 518 move.l %d0, (%a3) 519 520 /* invalidate and disable cache */ 521 move.l #0x01004100, %d0 /* Invalidate cache cmd */ 522 movec %d0, %CACR /* Invalidate cache */ 523 move.l #0, %d0 524 movec %d0, %ACR0 525 movec %d0, %ACR1 526 movec %d0, %ACR2 527 movec %d0, %ACR3 528 529 /* Must disable global address */ 530 move.l #0xFC008000, %a1 531 move.l #(CONFIG_SYS_CS0_BASE), (%a1) 532 move.l #0xFC008008, %a1 533 move.l #(CONFIG_SYS_CS0_CTRL), (%a1) 534 move.l #0xFC008004, %a1 535 move.l #(CONFIG_SYS_CS0_MASK), (%a1) 536 537 /* NAND port configuration */ 538 move.l #0xEC094048, %a1 539 move.b #0xFD, (%a1)+ 540 move.b #0x5F, (%a1)+ 541 move.b #0x04, (%a1)+ 542 543 /* reset nand */ 544 move.l #0xFC0FFF38, %a1 /* isr */ 545 move.l #0x000e0000, (%a1) 546 move.l #0xFC0FFF08, %a2 547 move.l #0x00000000, (%a2)+ /* car */ 548 move.l #0x11000000, (%a2)+ /* rar */ 549 move.l #0x00000000, (%a2)+ /* rpt */ 550 move.l #0x00000000, (%a2)+ /* rai */ 551 move.l #0xFC0FFF2c, %a2 /* cfg */ 552 move.l #0x00000000, (%a2)+ /* secsz */ 553 move.l #0x000e0681, (%a2)+ 554 move.l #0xFC0FFF04, %a2 /* cmd2 */ 555 move.l #0xFF404001, (%a2) 556 move.l #0x000e0000, (%a1) 557 558 move.l #0x2000, %d1 559 jsr asm_delay 560 561 /* setup nand */ 562 move.l #0xFC0FFF00, %a1 563 move.l #0x30700000, (%a1)+ /* cmd1 */ 564 move.l #0x007EF000, (%a1)+ /* cmd2 */ 565 566 move.l #0xFC0FFF2C, %a1 567 move.l #0x00000841, (%a1)+ /* secsz */ 568 move.l #0x000e0681, (%a1)+ /* cfg */ 569 570 move.l #100, %d4 /* 100 pages ~200KB */ 571 move.l #4, %d2 /* start at 4 */ 572 move.l #0xFC0FFF04, %a0 /* cmd2 */ 573 move.l #0xFC0FFF0C, %a1 /* rar */ 574 move.l #(CONFIG_SYS_TEXT_BASE + 0xF80), %a2 /* dst */ 575 576asm_nand_read: 577 move.l #0x11000000, %d0 /* rar */ 578 or.l %d2, %d0 579 move.l %d0, (%a1) 580 add.l #1, %d2 581 582 move.l (%a0), %d0 /* cmd2 */ 583 or.l #1, %d0 584 move.l %d0, (%a0) 585 586 move.l #0x200, %d1 587 jsr asm_delay 588 589asm_nand_chk_status: 590 move.l #0xFC0FFF38, %a4 /* isr */ 591 move.l (%a4), %d0 592 and.l #0x40000000, %d0 593 tst.l %d0 594 beq asm_nand_chk_status 595 596 move.l #0xFC0FFF38, %a4 /* isr */ 597 move.l (%a4), %d0 598 or.l #0x000E0000, %d0 599 move.l %d0, (%a4) 600 601 move.l #0x200, %d3 602 move.l #0xFC0FC000, %a3 /* buf 1 */ 603asm_nand_copy: 604 move.l (%a3)+, (%a2)+ 605 subq.l #1, %d3 606 bgt asm_nand_copy 607 608 subq.l #1, %d4 609 bgt asm_nand_read 610 611 /* jump to memory and execute */ 612 move.l #(CONFIG_SYS_TEXT_BASE + 0x400), %a0 613 jmp (%a0) 614 615#endif /* CONFIG_SYS_NAND_BOOT */ 616 617asm_delay: 618 nop 619 subq.l #1, %d1 620 bne asm_delay 621 rts 622#endif /* CONFIG_CF_SBF || CONFIG_NAND_U_BOOT */ 623 624 .text 625 . = 0x400 626 .globl _start 627_start: 628#if !defined(CONFIG_SERIAL_BOOT) 629 nop 630 nop 631 move.w #0x2700,%sr /* Mask off Interrupt */ 632 633 /* Set vector base register at the beginning of the Flash */ 634 move.l #CONFIG_SYS_FLASH_BASE, %d0 635 movec %d0, %VBR 636 637 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 638 movec %d0, %RAMBAR1 639 640 /* initialize general use internal ram */ 641 move.l #0, %d0 642 move.l #(ICACHE_STATUS), %a1 /* icache */ 643 move.l #(DCACHE_STATUS), %a2 /* dcache */ 644 move.l %d0, (%a1) 645 move.l %d0, (%a2) 646 647 /* invalidate and disable cache */ 648 move.l #(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0 649 movec %d0, %CACR /* Invalidate cache */ 650 move.l #0, %d0 651 movec %d0, %ACR0 652 movec %d0, %ACR1 653 movec %d0, %ACR2 654 movec %d0, %ACR3 655#else 656 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 657 movec %d0, %RAMBAR1 658#endif 659 660 /* set stackpointer to end of internal ram to get some stackspace for 661 the first c-code */ 662 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp 663 clr.l %sp@- 664 665 move.l #__got_start, %a5 /* put relocation table address to a5 */ 666 667 /* run low-level CPU init code (from flash) */ 668 move.l #cpu_init_f, %a1 669 jsr (%a1) 670 /* run low-level board init code (from flash) */ 671 move.l #board_init_f, %a1 672 jsr (%a1) 673 674 /* board_init_f() does not return */ 675 676/*------------------------------------------------------------------------------*/ 677 678/* 679 * void relocate_code (addr_sp, gd, addr_moni) 680 * 681 * This "function" does not return, instead it continues in RAM 682 * after relocating the monitor code. 683 * 684 * r3 = dest 685 * r4 = src 686 * r5 = length in bytes 687 * r6 = cachelinesize 688 */ 689 .globl relocate_code 690relocate_code: 691 link.w %a6,#0 692 move.l 8(%a6), %sp /* set new stack pointer */ 693 694 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ 695 move.l 16(%a6), %a0 /* Save copy of Destination Address */ 696 697 move.l #CONFIG_SYS_MONITOR_BASE, %a1 698 move.l #__init_end, %a2 699 move.l %a0, %a3 700 701 /* copy the code to RAM */ 7021: 703 move.l (%a1)+, (%a3)+ 704 cmp.l %a1,%a2 705 bgt.s 1b 706 707/* 708 * We are done. Do not return, instead branch to second part of board 709 * initialization, now running from RAM. 710 */ 711 move.l %a0, %a1 712 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 713 jmp (%a1) 714 715in_ram: 716 717clear_bss: 718 /* 719 * Now clear BSS segment 720 */ 721 move.l %a0, %a1 722 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 723 move.l %a0, %d1 724 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 7256: 726 clr.l (%a1)+ 727 cmp.l %a1,%d1 728 bgt.s 6b 729 730 /* 731 * fix got table in RAM 732 */ 733 move.l %a0, %a1 734 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 735 move.l %a1,%a5 /* * fix got pointer register a5 */ 736 737 move.l %a0, %a2 738 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 739 7407: 741 move.l (%a1),%d1 742 sub.l #_start,%d1 743 add.l %a0,%d1 744 move.l %d1,(%a1)+ 745 cmp.l %a2, %a1 746 bne 7b 747 748 /* calculate relative jump to board_init_r in ram */ 749 move.l %a0, %a1 750 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 751 752 /* set parameters for board_init_r */ 753 move.l %a0,-(%sp) /* dest_addr */ 754 move.l %d0,-(%sp) /* gd */ 755 jsr (%a1) 756 757/*------------------------------------------------------------------------------*/ 758/* exception code */ 759 .globl _fault 760_fault: 761 bra _fault 762 .globl _exc_handler 763 764_exc_handler: 765 SAVE_ALL 766 movel %sp,%sp@- 767 bsr exc_handler 768 addql #4,%sp 769 RESTORE_ALL 770 771 .globl _int_handler 772_int_handler: 773 SAVE_ALL 774 movel %sp,%sp@- 775 bsr int_handler 776 addql #4,%sp 777 RESTORE_ALL 778 779/*------------------------------------------------------------------------------*/ 780 781 .globl version_string 782version_string: 783 .ascii U_BOOT_VERSION_STRING, "\0" 784 .align 4 785