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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 | /* * linux/arch/arm/kernel/setup.c * * Copyright (C) 1995-2000 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/config.h> #include <linux/kernel.h> #include <linux/stddef.h> #include <linux/ioport.h> #include <linux/delay.h> #include <linux/utsname.h> #include <linux/blk.h> #include <linux/console.h> #include <linux/bootmem.h> #include <linux/init.h> #include <asm/elf.h> #include <asm/hardware.h> #include <asm/io.h> #include <asm/procinfo.h> #include <asm/setup.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/irq.h> #ifndef MEM_SIZE #define MEM_SIZE (16*1024*1024) #endif #ifndef CONFIG_CMDLINE #define CONFIG_CMDLINE "" #endif #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE) char fpe_type[8]; static int __init fpe_setup(char *line) { memcpy(fpe_type, line, 8); return 1; } __setup("fpe=", fpe_setup); #endif extern unsigned int mem_fclk_21285; extern void paging_init(struct meminfo *, struct machine_desc *desc); extern void convert_to_tag_list(struct param_struct *params, int mem_init); extern void bootmem_init(struct meminfo *); extern void reboot_setup(char *str); extern int root_mountflags; extern int _stext, _text, _etext, _edata, _end; unsigned int processor_id; unsigned int compat; unsigned int __machine_arch_type; unsigned int system_rev; unsigned int system_serial_low; unsigned int system_serial_high; unsigned int elf_hwcap; #ifdef MULTI_CPU struct processor processor; #endif unsigned char aux_device_present; char elf_platform[ELF_PLATFORM_SIZE]; char saved_command_line[COMMAND_LINE_SIZE]; static struct meminfo meminfo __initdata = { 0, }; static struct proc_info_item proc_info; static const char *machine_name; static char command_line[COMMAND_LINE_SIZE]; static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; #define ENDIANNESS ((char)endian_test.l) /* * Standard memory resources */ static struct resource mem_res[] = { { "Video RAM", 0, 0, IORESOURCE_MEM }, { "Kernel code", 0, 0, IORESOURCE_MEM }, { "Kernel data", 0, 0, IORESOURCE_MEM } }; #define video_ram mem_res[0] #define kernel_code mem_res[1] #define kernel_data mem_res[2] static struct resource io_res[] = { { "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY }, { "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY }, { "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY } }; #define lp0 io_res[0] #define lp1 io_res[1] #define lp2 io_res[2] static void __init setup_processor(void) { extern struct proc_info_list __proc_info_begin, __proc_info_end; struct proc_info_list *list; /* * locate processor in the list of supported processor * types. The linker builds this table for us from the * entries in arch/arm/mm/proc-*.S */ for (list = &__proc_info_begin; list < &__proc_info_end ; list++) if ((processor_id & list->cpu_mask) == list->cpu_val) break; /* * If processor type is unrecognised, then we * can do nothing... */ if (list >= &__proc_info_end) { printk("CPU configuration botched (ID %08x), unable " "to continue.\n", processor_id); while (1); } proc_info = *list->info; #ifdef MULTI_CPU processor = *list->proc; #endif printk("Processor: %s %s revision %d\n", proc_info.manufacturer, proc_info.cpu_name, (int)processor_id & 15); sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); elf_hwcap = list->elf_hwcap; cpu_proc_init(); } static struct machine_desc * __init setup_architecture(unsigned int nr) { extern struct machine_desc __arch_info_begin, __arch_info_end; struct machine_desc *list; /* * locate architecture in the list of supported architectures. */ for (list = &__arch_info_begin; list < &__arch_info_end; list++) if (list->nr == nr) break; /* * If the architecture type is not recognised, then we * can co nothing... */ if (list >= &__arch_info_end) { printk("Architecture configuration botched (nr %d), unable " "to continue.\n", nr); while (1); } printk("Architecture: %s\n", list->name); if (compat) printk(KERN_WARNING "Using compatibility code " "scheduled for removal in v%d.%d.%d\n", compat >> 24, (compat >> 12) & 0x3ff, compat & 0x3ff); return list; } /* * Initial parsing of the command line. We need to pick out the * memory size. We look for mem=size@start, where start and size * are "size[KkMm]" */ static void __init parse_cmdline(struct meminfo *mi, char **cmdline_p, char *from) { char c = ' ', *to = command_line; int usermem = 0, len = 0; for (;;) { if (c == ' ' && !memcmp(from, "mem=", 4)) { unsigned long size, start; if (to != command_line) to -= 1; /* * If the user specifies memory size, we * blow away any automatically generated * size. */ if (usermem == 0) { usermem = 1; mi->nr_banks = 0; } start = PHYS_OFFSET; size = memparse(from + 4, &from); if (*from == '@') start = memparse(from + 1, &from); mi->bank[mi->nr_banks].start = start; mi->bank[mi->nr_banks].size = size; mi->bank[mi->nr_banks].node = PHYS_TO_NID(start); mi->nr_banks += 1; } c = *from++; if (!c) break; if (COMMAND_LINE_SIZE <= ++len) break; *to++ = c; } *to = '\0'; *cmdline_p = command_line; } void __init setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) { #ifdef CONFIG_BLK_DEV_RAM extern int rd_size; rd_image_start = image_start; rd_prompt = prompt; rd_doload = doload; if (rd_sz) rd_size = rd_sz; #endif } /* * initial ram disk */ void __init setup_initrd(unsigned int start, unsigned int size) { #ifdef CONFIG_BLK_DEV_INITRD if (start == 0) size = 0; initrd_start = start; initrd_end = start + size; #endif } static void __init request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) { struct resource *res; int i; kernel_code.start = __virt_to_bus(init_mm.start_code); kernel_code.end = __virt_to_bus(init_mm.end_code - 1); kernel_data.start = __virt_to_bus(init_mm.end_code); kernel_data.end = __virt_to_bus(init_mm.brk - 1); for (i = 0; i < mi->nr_banks; i++) { unsigned long virt_start, virt_end; if (mi->bank[i].size == 0) continue; virt_start = __phys_to_virt(mi->bank[i].start); virt_end = virt_start + mi->bank[i].size - 1; res = alloc_bootmem_low(sizeof(*res)); res->name = "System RAM"; res->start = __virt_to_phys(virt_start); res->end = __virt_to_phys(virt_end); res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; request_resource(&iomem_resource, res); if (kernel_code.start >= res->start && kernel_code.end <= res->end) request_resource(res, &kernel_code); if (kernel_data.start >= res->start && kernel_data.end <= res->end) request_resource(res, &kernel_data); } if (mdesc->video_start) { video_ram.start = mdesc->video_start; video_ram.end = mdesc->video_end; request_resource(&iomem_resource, &video_ram); } /* * Some machines don't have the possibility of ever * possessing lp0, lp1 or lp2 */ if (mdesc->reserve_lp0) request_resource(&ioport_resource, &lp0); if (mdesc->reserve_lp1) request_resource(&ioport_resource, &lp1); if (mdesc->reserve_lp2) request_resource(&ioport_resource, &lp2); } /* * Tag parsing. * * This is the new way of passing data to the kernel at boot time. Rather * than passing a fixed inflexible structure to the kernel, we pass a list * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE * tag for the list to be recognised (to distinguish the tagged list from * a param_struct). The list is terminated with a zero-length tag (this tag * is not parsed in any way). */ static int __init parse_tag_core(const struct tag *tag) { if (tag->hdr.size > 2) { if ((tag->u.core.flags & 1) == 0) root_mountflags &= ~MS_RDONLY; ROOT_DEV = to_kdev_t(tag->u.core.rootdev); } return 0; } __tagtable(ATAG_CORE, parse_tag_core); static int __init parse_tag_mem32(const struct tag *tag) { if (meminfo.nr_banks >= NR_BANKS) { printk(KERN_WARNING "Ignoring memory bank 0x%08x size %dKB\n", tag->u.mem.start, tag->u.mem.size / 1024); return -EINVAL; } meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start; meminfo.bank[meminfo.nr_banks].size = tag->u.mem.size; meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(tag->u.mem.start); meminfo.nr_banks += 1; return 0; } __tagtable(ATAG_MEM, parse_tag_mem32); #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) struct screen_info screen_info = { orig_video_lines: 30, orig_video_cols: 80, orig_video_mode: 0, orig_video_ega_bx: 0, orig_video_isVGA: 1, orig_video_points: 8 }; static int __init parse_tag_videotext(const struct tag *tag) { screen_info.orig_x = tag->u.videotext.x; screen_info.orig_y = tag->u.videotext.y; screen_info.orig_video_page = tag->u.videotext.video_page; screen_info.orig_video_mode = tag->u.videotext.video_mode; screen_info.orig_video_cols = tag->u.videotext.video_cols; screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; screen_info.orig_video_lines = tag->u.videotext.video_lines; screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; screen_info.orig_video_points = tag->u.videotext.video_points; return 0; } __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); #endif static int __init parse_tag_ramdisk(const struct tag *tag) { setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, (tag->u.ramdisk.flags & 2) == 0, tag->u.ramdisk.start, tag->u.ramdisk.size); return 0; } __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); static int __init parse_tag_initrd(const struct tag *tag) { setup_initrd(tag->u.initrd.start, tag->u.initrd.size); return 0; } __tagtable(ATAG_INITRD, parse_tag_initrd); static int __init parse_tag_serialnr(const struct tag *tag) { system_serial_low = tag->u.serialnr.low; system_serial_high = tag->u.serialnr.high; return 0; } __tagtable(ATAG_SERIAL, parse_tag_serialnr); static int __init parse_tag_revision(const struct tag *tag) { system_rev = tag->u.revision.rev; return 0; } __tagtable(ATAG_REVISION, parse_tag_revision); static int __init parse_tag_cmdline(const struct tag *tag) { strncpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); default_command_line[COMMAND_LINE_SIZE - 1] = '\0'; return 0; } __tagtable(ATAG_CMDLINE, parse_tag_cmdline); /* * Scan the tag table for this tag, and call its parse function. * The tag table is built by the linker from all the __tagtable * declarations. */ static int __init parse_tag(const struct tag *tag) { extern struct tagtable __tagtable_begin, __tagtable_end; struct tagtable *t; for (t = &__tagtable_begin; t < &__tagtable_end; t++) if (tag->hdr.tag == t->tag) { t->parse(tag); break; } return t < &__tagtable_end; } /* * Parse all tags in the list, checking both the global and architecture * specific tag tables. */ static void __init parse_tags(const struct tag *t) { for (; t->hdr.size; t = tag_next(t)) if (!parse_tag(t)) printk(KERN_WARNING "Ignoring unrecognised tag 0x%08x\n", t->hdr.tag); } void __init setup_arch(char **cmdline_p) { struct tag *tags = NULL; struct machine_desc *mdesc; char *from = default_command_line; ROOT_DEV = MKDEV(0, 255); setup_processor(); mdesc = setup_architecture(machine_arch_type); machine_name = mdesc->name; if (mdesc->soft_reboot) reboot_setup("s"); if (mdesc->param_offset) tags = phys_to_virt(mdesc->param_offset); /* * Do the machine-specific fixups before we parse the * parameters or tags. */ if (mdesc->fixup) mdesc->fixup(mdesc, (struct param_struct *)tags, &from, &meminfo); /* * If we have the old style parameters, convert them to * a tag list before. */ if (tags && tags->hdr.tag != ATAG_CORE) convert_to_tag_list((struct param_struct *)tags, meminfo.nr_banks == 0); if (tags && tags->hdr.tag == ATAG_CORE) parse_tags(tags); if (meminfo.nr_banks == 0) { meminfo.nr_banks = 1; meminfo.bank[0].start = PHYS_OFFSET; meminfo.bank[0].size = MEM_SIZE; } init_mm.start_code = (unsigned long) &_text; init_mm.end_code = (unsigned long) &_etext; init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) &_end; memcpy(saved_command_line, from, COMMAND_LINE_SIZE); saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; parse_cmdline(&meminfo, cmdline_p, from); bootmem_init(&meminfo); paging_init(&meminfo, mdesc); request_standard_resources(&meminfo, mdesc); /* * Set up various architecture-specific pointers */ init_arch_irq = mdesc->init_irq; #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) conswitchp = &vga_con; #elif defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif #endif } int get_cpuinfo(char * buffer) { char *p = buffer; p += sprintf(p, "Processor\t: %s %s rev %d (%s)\n", proc_info.manufacturer, proc_info.cpu_name, (int)processor_id & 15, elf_platform); p += sprintf(p, "BogoMIPS\t: %lu.%02lu\n", loops_per_jiffy / (500000/HZ), (loops_per_jiffy / (5000/HZ)) % 100); p += sprintf(p, "Hardware\t: %s\n", machine_name); p += sprintf(p, "Revision\t: %04x\n", system_rev); p += sprintf(p, "Serial\t\t: %08x%08x\n", system_serial_high, system_serial_low); return p - buffer; } |