1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * (C) Copyright 2002-2006 4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 * 6 * (C) Copyright 2002 7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 8 * Marius Groeger <mgroeger@sysgo.de> 9 * 10 * See file CREDITS for list of people who contributed to this 11 * project. 12 * 13 * This program is free software; you can redistribute it and/or 14 * modify it under the terms of the GNU General Public License as 15 * published by the Free Software Foundation; either version 2 of 16 * the License, or (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 26 * MA 02111-1307 USA 27 */ 28 29 #include <common.h> 30 #include <linux/compiler.h> 31 #include <version.h> 32 #include <environment.h> 33 #include <fdtdec.h> 34 #include <initcall.h> 35 #include <logbuff.h> 36 #include <post.h> 37 #include <asm/io.h> 38 #include <asm/sections.h> 39 #include <linux/compiler.h> 40 41 /* 42 * Pointer to initial global data area 43 * 44 * Here we initialize it if needed. 45 */ 46 #ifdef XTRN_DECLARE_GLOBAL_DATA_PTR 47 #undef XTRN_DECLARE_GLOBAL_DATA_PTR 48 #define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */ 49 DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR); 50 #else 51 DECLARE_GLOBAL_DATA_PTR; 52 #endif 53 54 /* 55 * sjg: IMO this code should be 56 * refactored to a single function, something like: 57 * 58 * void led_set_state(enum led_colour_t colour, int on); 59 */ 60 /************************************************************************ 61 * Coloured LED functionality 62 ************************************************************************ 63 * May be supplied by boards if desired 64 */ 65 inline void __coloured_LED_init(void) {} 66 void coloured_LED_init(void) 67 __attribute__((weak, alias("__coloured_LED_init"))); 68 inline void __red_led_on(void) {} 69 void red_led_on(void) __attribute__((weak, alias("__red_led_on"))); 70 inline void __red_led_off(void) {} 71 void red_led_off(void) __attribute__((weak, alias("__red_led_off"))); 72 inline void __green_led_on(void) {} 73 void green_led_on(void) __attribute__((weak, alias("__green_led_on"))); 74 inline void __green_led_off(void) {} 75 void green_led_off(void) __attribute__((weak, alias("__green_led_off"))); 76 inline void __yellow_led_on(void) {} 77 void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on"))); 78 inline void __yellow_led_off(void) {} 79 void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off"))); 80 inline void __blue_led_on(void) {} 81 void blue_led_on(void) __attribute__((weak, alias("__blue_led_on"))); 82 inline void __blue_led_off(void) {} 83 void blue_led_off(void) __attribute__((weak, alias("__blue_led_off"))); 84 85 /* 86 * Why is gd allocated a register? Prior to reloc it might be better to 87 * just pass it around to each function in this file? 88 * 89 * After reloc one could argue that it is hardly used and doesn't need 90 * to be in a register. Or if it is it should perhaps hold pointers to all 91 * global data for all modules, so that post-reloc we can avoid the massive 92 * literal pool we get on ARM. Or perhaps just encourage each module to use 93 * a structure... 94 */ 95 96 /* 97 * Could the CONFIG_SPL_BUILD infection become a flag in gd? 98 */ 99 100 static int init_baud_rate(void) 101 { 102 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE); 103 return 0; 104 } 105 106 static int display_text_info(void) 107 { 108 ulong bss_start, bss_end; 109 110 #ifdef CONFIG_SYS_SYM_OFFSETS 111 bss_start = _bss_start_ofs + _TEXT_BASE; 112 bss_end = _bss_end_ofs + _TEXT_BASE; 113 #else 114 bss_start = (ulong)&__bss_start; 115 bss_end = (ulong)&__bss_end; 116 #endif 117 debug("U-Boot code: %08X -> %08lX BSS: -> %08lX\n", 118 CONFIG_SYS_TEXT_BASE, bss_start, bss_end); 119 120 #ifdef CONFIG_MODEM_SUPPORT 121 debug("Modem Support enabled\n"); 122 #endif 123 #ifdef CONFIG_USE_IRQ 124 debug("IRQ Stack: %08lx\n", IRQ_STACK_START); 125 debug("FIQ Stack: %08lx\n", FIQ_STACK_START); 126 #endif 127 128 return 0; 129 } 130 131 static int announce_dram_init(void) 132 { 133 puts("DRAM: "); 134 return 0; 135 } 136 137 static int show_dram_config(void) 138 { 139 ulong size; 140 141 #ifdef CONFIG_NR_DRAM_BANKS 142 int i; 143 144 debug("\nRAM Configuration:\n"); 145 for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 146 size += gd->bd->bi_dram[i].size; 147 debug("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start); 148 #ifdef DEBUG 149 print_size(gd->bd->bi_dram[i].size, "\n"); 150 #endif 151 } 152 debug("\nDRAM: "); 153 #else 154 size = gd->ram_size; 155 #endif 156 157 print_size(size, "\n"); 158 159 return 0; 160 } 161 162 void __dram_init_banksize(void) 163 { 164 #if defined(CONFIG_NR_DRAM_BANKS) && defined(CONFIG_SYS_SDRAM_BASE) 165 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; 166 gd->bd->bi_dram[0].size = get_effective_memsize(); 167 #endif 168 } 169 170 void dram_init_banksize(void) 171 __attribute__((weak, alias("__dram_init_banksize"))); 172 173 static int zero_global_data(void) 174 { 175 memset((void *)gd, '\0', sizeof(gd_t)); 176 177 return 0; 178 } 179 180 static int setup_mon_len(void) 181 { 182 #ifdef CONFIG_SYS_SYM_OFFSETS 183 gd->mon_len = _bss_end_ofs; 184 #else 185 gd->mon_len = (ulong)&__bss_end - (ulong)&__text_start; 186 #endif 187 return 0; 188 } 189 190 __weak int arch_cpu_init(void) 191 { 192 return 0; 193 } 194 195 static int setup_fdt(void) 196 { 197 #ifdef CONFIG_OF_EMBED 198 /* Get a pointer to the FDT */ 199 gd->fdt_blob = _binary_dt_dtb_start; 200 #elif defined CONFIG_OF_SEPARATE 201 /* FDT is at end of image */ 202 # ifdef CONFIG_SYS_SYM_OFFSETS 203 gd->fdt_blob = (void *)(_end_ofs + CONFIG_SYS_TEXT_BASE); 204 # else 205 gd->fdt_blob = (ulong *)&_end; 206 # endif 207 #endif 208 /* Allow the early environment to override the fdt address */ 209 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 210 (uintptr_t)gd->fdt_blob); 211 return 0; 212 } 213 214 /* Get the top of usable RAM */ 215 __weak ulong board_get_usable_ram_top(ulong total_size) 216 { 217 return gd->ram_top; 218 } 219 220 static int setup_dest_addr(void) 221 { 222 debug("Monitor len: %08lX\n", gd->mon_len); 223 /* 224 * Ram is setup, size stored in gd !! 225 */ 226 debug("Ram size: %08lX\n", (ulong)gd->ram_size); 227 #if defined(CONFIG_SYS_MEM_TOP_HIDE) 228 /* 229 * Subtract specified amount of memory to hide so that it won't 230 * get "touched" at all by U-Boot. By fixing up gd->ram_size 231 * the Linux kernel should now get passed the now "corrected" 232 * memory size and won't touch it either. This should work 233 * for arch/ppc and arch/powerpc. Only Linux board ports in 234 * arch/powerpc with bootwrapper support, that recalculate the 235 * memory size from the SDRAM controller setup will have to 236 * get fixed. 237 */ 238 gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE; 239 #endif 240 #ifdef CONFIG_SYS_SDRAM_BASE 241 gd->ram_top = CONFIG_SYS_SDRAM_BASE; 242 #endif 243 gd->ram_top = board_get_usable_ram_top(gd->mon_len); 244 gd->dest_addr = gd->ram_top; 245 debug("Ram top: %08lX\n", (ulong)gd->ram_top); 246 gd->dest_addr_sp = gd->dest_addr; 247 return 0; 248 } 249 250 #if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR) 251 static int reserve_logbuffer(void) 252 { 253 /* reserve kernel log buffer */ 254 gd->dest_addr -= LOGBUFF_RESERVE; 255 debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, 256 gd->dest_addr); 257 return 0; 258 } 259 #endif 260 261 #ifdef CONFIG_PRAM 262 /* reserve protected RAM */ 263 static int reserve_pram(void) 264 { 265 ulong reg; 266 267 reg = getenv_ulong("pram", 10, CONFIG_PRAM); 268 gd->dest_addr -= (reg << 10); /* size is in kB */ 269 debug("Reserving %ldk for protected RAM at %08lx\n", reg, 270 gd->dest_addr); 271 return 0; 272 } 273 #endif /* CONFIG_PRAM */ 274 275 /* Round memory pointer down to next 4 kB limit */ 276 static int reserve_round_4k(void) 277 { 278 gd->dest_addr &= ~(4096 - 1); 279 return 0; 280 } 281 282 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \ 283 defined(CONFIG_ARM) 284 static int reserve_mmu(void) 285 { 286 /* reserve TLB table */ 287 gd->arch.tlb_size = 4096 * 4; 288 gd->dest_addr -= gd->arch.tlb_size; 289 290 /* round down to next 64 kB limit */ 291 gd->dest_addr &= ~(0x10000 - 1); 292 293 gd->arch.tlb_addr = gd->dest_addr; 294 debug("TLB table from %08lx to %08lx\n", gd->arch.tlb_addr, 295 gd->arch.tlb_addr + gd->arch.tlb_size); 296 return 0; 297 } 298 #endif 299 300 #ifdef CONFIG_LCD 301 static int reserve_lcd(void) 302 { 303 #ifdef CONFIG_FB_ADDR 304 gd->fb_base = CONFIG_FB_ADDR; 305 #else 306 /* reserve memory for LCD display (always full pages) */ 307 gd->dest_addr = lcd_setmem(gd->dest_addr); 308 gd->fb_base = gd->dest_addr; 309 #endif /* CONFIG_FB_ADDR */ 310 return 0; 311 } 312 #endif /* CONFIG_LCD */ 313 314 static int reserve_uboot(void) 315 { 316 /* 317 * reserve memory for U-Boot code, data & bss 318 * round down to next 4 kB limit 319 */ 320 gd->dest_addr -= gd->mon_len; 321 gd->dest_addr &= ~(4096 - 1); 322 323 debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10, 324 gd->dest_addr); 325 return 0; 326 } 327 328 #ifndef CONFIG_SPL_BUILD 329 /* reserve memory for malloc() area */ 330 static int reserve_malloc(void) 331 { 332 gd->dest_addr_sp = gd->dest_addr - TOTAL_MALLOC_LEN; 333 debug("Reserving %dk for malloc() at: %08lx\n", 334 TOTAL_MALLOC_LEN >> 10, gd->dest_addr_sp); 335 return 0; 336 } 337 338 /* (permanently) allocate a Board Info struct */ 339 static int reserve_board(void) 340 { 341 gd->dest_addr_sp -= sizeof(bd_t); 342 gd->bd = (bd_t *)gd->dest_addr_sp; 343 memset(gd->bd, '\0', sizeof(bd_t)); 344 debug("Reserving %zu Bytes for Board Info at: %08lx\n", 345 sizeof(bd_t), gd->dest_addr_sp); 346 return 0; 347 } 348 #endif 349 350 static int setup_machine(void) 351 { 352 #ifdef CONFIG_MACH_TYPE 353 gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */ 354 #endif 355 return 0; 356 } 357 358 static int reserve_global_data(void) 359 { 360 gd->dest_addr_sp -= sizeof(gd_t); 361 gd->new_gd = (gd_t *)gd->dest_addr_sp; 362 debug("Reserving %zu Bytes for Global Data at: %08lx\n", 363 sizeof(gd_t), gd->dest_addr_sp); 364 return 0; 365 } 366 367 static int reserve_fdt(void) 368 { 369 /* 370 * If the device tree is sitting immediate above our image then we 371 * must relocate it. If it is embedded in the data section, then it 372 * will be relocated with other data. 373 */ 374 if (gd->fdt_blob) { 375 gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32); 376 377 gd->dest_addr_sp -= gd->fdt_size; 378 gd->new_fdt = (void *)gd->dest_addr_sp; 379 debug("Reserving %lu Bytes for FDT at: %p\n", 380 gd->fdt_size, gd->new_fdt); 381 } 382 383 return 0; 384 } 385 386 static int reserve_stacks(void) 387 { 388 #ifdef CONFIG_SPL_BUILD 389 # ifdef CONFIG_ARM 390 gd->dest_addr_sp -= 128; /* leave 32 words for abort-stack */ 391 gd->irq_sp = gd->dest_addr_sp; 392 # endif 393 #else 394 395 /* setup stack pointer for exceptions */ 396 gd->dest_addr_sp -= 16; 397 gd->dest_addr_sp &= ~0xf; 398 gd->irq_sp = gd->dest_addr_sp; 399 400 /* 401 * Handle architecture-specific things here 402 * TODO(sjg@chromium.org): Perhaps create arch_reserve_stack() 403 * to handle this and put in arch/xxx/lib/stack.c 404 */ 405 # ifdef CONFIG_ARM 406 # ifdef CONFIG_USE_IRQ 407 gd->dest_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ); 408 debug("Reserving %zu Bytes for IRQ stack at: %08lx\n", 409 CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->dest_addr_sp); 410 411 /* 8-byte alignment for ARM ABI compliance */ 412 gd->dest_addr_sp &= ~0x07; 413 # endif 414 /* leave 3 words for abort-stack, plus 1 for alignment */ 415 gd->dest_addr_sp -= 16; 416 # endif /* Architecture specific code */ 417 418 return 0; 419 #endif 420 } 421 422 static int display_new_sp(void) 423 { 424 debug("New Stack Pointer is: %08lx\n", gd->dest_addr_sp); 425 426 return 0; 427 } 428 429 #ifdef CONFIG_POST 430 static int init_post(void) 431 { 432 post_bootmode_init(); 433 post_run(NULL, POST_ROM | post_bootmode_get(0)); 434 435 return 0; 436 } 437 #endif 438 439 static int setup_baud_rate(void) 440 { 441 /* Ick, can we get rid of this line? */ 442 gd->bd->bi_baudrate = gd->baudrate; 443 444 return 0; 445 } 446 447 static int setup_dram_config(void) 448 { 449 /* Ram is board specific, so move it to board code ... */ 450 dram_init_banksize(); 451 452 return 0; 453 } 454 455 static int reloc_fdt(void) 456 { 457 if (gd->new_fdt) { 458 memcpy(gd->new_fdt, gd->fdt_blob, gd->fdt_size); 459 gd->fdt_blob = gd->new_fdt; 460 } 461 462 return 0; 463 } 464 465 static int setup_reloc(void) 466 { 467 gd->relocaddr = gd->dest_addr; 468 gd->start_addr_sp = gd->dest_addr_sp; 469 gd->reloc_off = gd->dest_addr - CONFIG_SYS_TEXT_BASE; 470 memcpy(gd->new_gd, (char *)gd, sizeof(gd_t)); 471 472 debug("Relocation Offset is: %08lx\n", gd->reloc_off); 473 debug("Relocating to %08lx, new gd at %p, sp at %08lx\n", 474 gd->dest_addr, gd->new_gd, gd->dest_addr_sp); 475 476 return 0; 477 } 478 479 /* ARM calls relocate_code from its crt0.S */ 480 #if !defined(CONFIG_ARM) 481 482 static int jump_to_copy(void) 483 { 484 relocate_code(gd->dest_addr_sp, gd->new_gd, gd->dest_addr); 485 486 return 0; 487 } 488 #endif 489 490 /* Record the board_init_f() bootstage (after arch_cpu_init()) */ 491 static int mark_bootstage(void) 492 { 493 bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f"); 494 495 return 0; 496 } 497 498 static init_fnc_t init_sequence_f[] = { 499 zero_global_data, 500 setup_fdt, 501 setup_mon_len, 502 arch_cpu_init, /* basic arch cpu dependent setup */ 503 mark_bootstage, 504 #ifdef CONFIG_OF_CONTROL 505 fdtdec_check_fdt, 506 #endif 507 #if defined(CONFIG_BOARD_EARLY_INIT_F) 508 board_early_init_f, 509 #endif 510 timer_init, /* initialize timer */ 511 #ifdef CONFIG_BOARD_POSTCLK_INIT 512 board_postclk_init, 513 #endif 514 #ifdef CONFIG_FSL_ESDHC 515 get_clocks, 516 #endif 517 env_init, /* initialize environment */ 518 init_baud_rate, /* initialze baudrate settings */ 519 serial_init, /* serial communications setup */ 520 console_init_f, /* stage 1 init of console */ 521 display_options, /* say that we are here */ 522 display_text_info, /* show debugging info if required */ 523 #if defined(CONFIG_DISPLAY_CPUINFO) 524 print_cpuinfo, /* display cpu info (and speed) */ 525 #endif 526 #if defined(CONFIG_DISPLAY_BOARDINFO) 527 checkboard, /* display board info */ 528 #endif 529 announce_dram_init, 530 /* TODO: unify all these dram functions? */ 531 #ifdef CONFIG_ARM 532 dram_init, /* configure available RAM banks */ 533 #endif 534 #ifdef CONFIG_POST 535 init_post, 536 #endif 537 /* 538 * Now that we have DRAM mapped and working, we can 539 * relocate the code and continue running from DRAM. 540 * 541 * Reserve memory at end of RAM for (top down in that order): 542 * - area that won't get touched by U-Boot and Linux (optional) 543 * - kernel log buffer 544 * - protected RAM 545 * - LCD framebuffer 546 * - monitor code 547 * - board info struct 548 */ 549 setup_dest_addr, 550 #if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR) 551 reserve_logbuffer, 552 #endif 553 #ifdef CONFIG_PRAM 554 reserve_pram, 555 #endif 556 reserve_round_4k, 557 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \ 558 defined(CONFIG_ARM) 559 reserve_mmu, 560 #endif 561 #ifdef CONFIG_LCD 562 reserve_lcd, 563 #endif 564 reserve_uboot, 565 #ifndef CONFIG_SPL_BUILD 566 reserve_malloc, 567 reserve_board, 568 #endif 569 setup_machine, 570 reserve_global_data, 571 reserve_fdt, 572 reserve_stacks, 573 setup_dram_config, 574 show_dram_config, 575 setup_baud_rate, 576 display_new_sp, 577 reloc_fdt, 578 setup_reloc, 579 #ifndef CONFIG_ARM 580 jump_to_copy, 581 #endif 582 NULL, 583 }; 584 585 void board_init_f(ulong boot_flags) 586 { 587 gd_t data; 588 589 gd = &data; 590 591 gd->flags = boot_flags; 592 593 if (initcall_run_list(init_sequence_f)) 594 hang(); 595 596 #ifndef CONFIG_ARM 597 /* NOTREACHED - jump_to_copy() does not return */ 598 hang(); 599 #endif 600 } 601 602 void hang(void) 603 { 604 puts("### ERROR ### Please RESET the board ###\n"); 605 for (;;); 606 } 607