setup_64.c revision f2783c15007468c14972e2617db51e9affc7fad9
1/* 2 * 3 * Common boot and setup code. 4 * 5 * Copyright (C) 2001 PPC64 Team, IBM Corp 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13#undef DEBUG 14 15#include <linux/config.h> 16#include <linux/module.h> 17#include <linux/string.h> 18#include <linux/sched.h> 19#include <linux/init.h> 20#include <linux/kernel.h> 21#include <linux/reboot.h> 22#include <linux/delay.h> 23#include <linux/initrd.h> 24#include <linux/ide.h> 25#include <linux/seq_file.h> 26#include <linux/ioport.h> 27#include <linux/console.h> 28#include <linux/utsname.h> 29#include <linux/tty.h> 30#include <linux/root_dev.h> 31#include <linux/notifier.h> 32#include <linux/cpu.h> 33#include <linux/unistd.h> 34#include <linux/serial.h> 35#include <linux/serial_8250.h> 36#include <asm/io.h> 37#include <asm/prom.h> 38#include <asm/processor.h> 39#include <asm/pgtable.h> 40#include <asm/bootinfo.h> 41#include <asm/smp.h> 42#include <asm/elf.h> 43#include <asm/machdep.h> 44#include <asm/paca.h> 45#include <asm/ppcdebug.h> 46#include <asm/time.h> 47#include <asm/cputable.h> 48#include <asm/sections.h> 49#include <asm/btext.h> 50#include <asm/nvram.h> 51#include <asm/setup.h> 52#include <asm/system.h> 53#include <asm/rtas.h> 54#include <asm/iommu.h> 55#include <asm/serial.h> 56#include <asm/cache.h> 57#include <asm/page.h> 58#include <asm/mmu.h> 59#include <asm/lmb.h> 60#include <asm/iSeries/ItLpNaca.h> 61#include <asm/firmware.h> 62#include <asm/systemcfg.h> 63 64#ifdef DEBUG 65#define DBG(fmt...) udbg_printf(fmt) 66#else 67#define DBG(fmt...) 68#endif 69 70/* 71 * Here are some early debugging facilities. You can enable one 72 * but your kernel will not boot on anything else if you do so 73 */ 74 75/* This one is for use on LPAR machines that support an HVC console 76 * on vterm 0 77 */ 78extern void udbg_init_debug_lpar(void); 79/* This one is for use on Apple G5 machines 80 */ 81extern void udbg_init_pmac_realmode(void); 82/* That's RTAS panel debug */ 83extern void call_rtas_display_status_delay(unsigned char c); 84/* Here's maple real mode debug */ 85extern void udbg_init_maple_realmode(void); 86 87#define EARLY_DEBUG_INIT() do {} while(0) 88 89#if 0 90#define EARLY_DEBUG_INIT() udbg_init_debug_lpar() 91#define EARLY_DEBUG_INIT() udbg_init_maple_realmode() 92#define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() 93#define EARLY_DEBUG_INIT() \ 94 do { udbg_putc = call_rtas_display_status_delay; } while(0) 95#endif 96 97/* extern void *stab; */ 98extern unsigned long klimit; 99 100extern void mm_init_ppc64(void); 101extern void stab_initialize(unsigned long stab); 102extern void htab_initialize(void); 103extern void early_init_devtree(void *flat_dt); 104extern void unflatten_device_tree(void); 105 106extern void smp_release_cpus(void); 107 108int have_of = 1; 109int boot_cpuid = 0; 110int boot_cpuid_phys = 0; 111dev_t boot_dev; 112u64 ppc64_pft_size; 113 114struct ppc64_caches ppc64_caches; 115EXPORT_SYMBOL_GPL(ppc64_caches); 116 117/* 118 * These are used in binfmt_elf.c to put aux entries on the stack 119 * for each elf executable being started. 120 */ 121int dcache_bsize; 122int icache_bsize; 123int ucache_bsize; 124 125/* The main machine-dep calls structure 126 */ 127struct machdep_calls ppc_md; 128EXPORT_SYMBOL(ppc_md); 129 130#ifdef CONFIG_MAGIC_SYSRQ 131unsigned long SYSRQ_KEY; 132#endif /* CONFIG_MAGIC_SYSRQ */ 133 134 135static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); 136static struct notifier_block ppc64_panic_block = { 137 .notifier_call = ppc64_panic_event, 138 .priority = INT_MIN /* may not return; must be done last */ 139}; 140 141/* 142 * Perhaps we can put the pmac screen_info[] here 143 * on pmac as well so we don't need the ifdef's. 144 * Until we get multiple-console support in here 145 * that is. -- Cort 146 * Maybe tie it to serial consoles, since this is really what 147 * these processors use on existing boards. -- Dan 148 */ 149struct screen_info screen_info = { 150 .orig_x = 0, 151 .orig_y = 25, 152 .orig_video_cols = 80, 153 .orig_video_lines = 25, 154 .orig_video_isVGA = 1, 155 .orig_video_points = 16 156}; 157 158#ifdef CONFIG_SMP 159 160static int smt_enabled_cmdline; 161 162/* Look for ibm,smt-enabled OF option */ 163static void check_smt_enabled(void) 164{ 165 struct device_node *dn; 166 char *smt_option; 167 168 /* Allow the command line to overrule the OF option */ 169 if (smt_enabled_cmdline) 170 return; 171 172 dn = of_find_node_by_path("/options"); 173 174 if (dn) { 175 smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); 176 177 if (smt_option) { 178 if (!strcmp(smt_option, "on")) 179 smt_enabled_at_boot = 1; 180 else if (!strcmp(smt_option, "off")) 181 smt_enabled_at_boot = 0; 182 } 183 } 184} 185 186/* Look for smt-enabled= cmdline option */ 187static int __init early_smt_enabled(char *p) 188{ 189 smt_enabled_cmdline = 1; 190 191 if (!p) 192 return 0; 193 194 if (!strcmp(p, "on") || !strcmp(p, "1")) 195 smt_enabled_at_boot = 1; 196 else if (!strcmp(p, "off") || !strcmp(p, "0")) 197 smt_enabled_at_boot = 0; 198 199 return 0; 200} 201early_param("smt-enabled", early_smt_enabled); 202 203/** 204 * setup_cpu_maps - initialize the following cpu maps: 205 * cpu_possible_map 206 * cpu_present_map 207 * cpu_sibling_map 208 * 209 * Having the possible map set up early allows us to restrict allocations 210 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. 211 * 212 * We do not initialize the online map here; cpus set their own bits in 213 * cpu_online_map as they come up. 214 * 215 * This function is valid only for Open Firmware systems. finish_device_tree 216 * must be called before using this. 217 * 218 * While we're here, we may as well set the "physical" cpu ids in the paca. 219 */ 220static void __init setup_cpu_maps(void) 221{ 222 struct device_node *dn = NULL; 223 int cpu = 0; 224 int swap_cpuid = 0; 225 226 check_smt_enabled(); 227 228 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { 229 u32 *intserv; 230 int j, len = sizeof(u32), nthreads; 231 232 intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s", 233 &len); 234 if (!intserv) 235 intserv = (u32 *)get_property(dn, "reg", NULL); 236 237 nthreads = len / sizeof(u32); 238 239 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { 240 cpu_set(cpu, cpu_present_map); 241 set_hard_smp_processor_id(cpu, intserv[j]); 242 243 if (intserv[j] == boot_cpuid_phys) 244 swap_cpuid = cpu; 245 cpu_set(cpu, cpu_possible_map); 246 cpu++; 247 } 248 } 249 250 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that 251 * boot cpu is logical 0. 252 */ 253 if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { 254 u32 tmp; 255 tmp = get_hard_smp_processor_id(0); 256 set_hard_smp_processor_id(0, boot_cpuid_phys); 257 set_hard_smp_processor_id(swap_cpuid, tmp); 258 } 259 260 /* 261 * On pSeries LPAR, we need to know how many cpus 262 * could possibly be added to this partition. 263 */ 264 if (systemcfg->platform == PLATFORM_PSERIES_LPAR && 265 (dn = of_find_node_by_path("/rtas"))) { 266 int num_addr_cell, num_size_cell, maxcpus; 267 unsigned int *ireg; 268 269 num_addr_cell = prom_n_addr_cells(dn); 270 num_size_cell = prom_n_size_cells(dn); 271 272 ireg = (unsigned int *) 273 get_property(dn, "ibm,lrdr-capacity", NULL); 274 275 if (!ireg) 276 goto out; 277 278 maxcpus = ireg[num_addr_cell + num_size_cell]; 279 280 /* Double maxcpus for processors which have SMT capability */ 281 if (cpu_has_feature(CPU_FTR_SMT)) 282 maxcpus *= 2; 283 284 if (maxcpus > NR_CPUS) { 285 printk(KERN_WARNING 286 "Partition configured for %d cpus, " 287 "operating system maximum is %d.\n", 288 maxcpus, NR_CPUS); 289 maxcpus = NR_CPUS; 290 } else 291 printk(KERN_INFO "Partition configured for %d cpus.\n", 292 maxcpus); 293 294 for (cpu = 0; cpu < maxcpus; cpu++) 295 cpu_set(cpu, cpu_possible_map); 296 out: 297 of_node_put(dn); 298 } 299 300 /* 301 * Do the sibling map; assume only two threads per processor. 302 */ 303 for_each_cpu(cpu) { 304 cpu_set(cpu, cpu_sibling_map[cpu]); 305 if (cpu_has_feature(CPU_FTR_SMT)) 306 cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); 307 } 308 309 systemcfg->processorCount = num_present_cpus(); 310} 311#endif /* CONFIG_SMP */ 312 313extern struct machdep_calls pSeries_md; 314extern struct machdep_calls pmac_md; 315extern struct machdep_calls maple_md; 316extern struct machdep_calls bpa_md; 317extern struct machdep_calls iseries_md; 318 319/* Ultimately, stuff them in an elf section like initcalls... */ 320static struct machdep_calls __initdata *machines[] = { 321#ifdef CONFIG_PPC_PSERIES 322 &pSeries_md, 323#endif /* CONFIG_PPC_PSERIES */ 324#ifdef CONFIG_PPC_PMAC 325 &pmac_md, 326#endif /* CONFIG_PPC_PMAC */ 327#ifdef CONFIG_PPC_MAPLE 328 &maple_md, 329#endif /* CONFIG_PPC_MAPLE */ 330#ifdef CONFIG_PPC_BPA 331 &bpa_md, 332#endif 333#ifdef CONFIG_PPC_ISERIES 334 &iseries_md, 335#endif 336 NULL 337}; 338 339/* 340 * Early initialization entry point. This is called by head.S 341 * with MMU translation disabled. We rely on the "feature" of 342 * the CPU that ignores the top 2 bits of the address in real 343 * mode so we can access kernel globals normally provided we 344 * only toy with things in the RMO region. From here, we do 345 * some early parsing of the device-tree to setup out LMB 346 * data structures, and allocate & initialize the hash table 347 * and segment tables so we can start running with translation 348 * enabled. 349 * 350 * It is this function which will call the probe() callback of 351 * the various platform types and copy the matching one to the 352 * global ppc_md structure. Your platform can eventually do 353 * some very early initializations from the probe() routine, but 354 * this is not recommended, be very careful as, for example, the 355 * device-tree is not accessible via normal means at this point. 356 */ 357 358void __init early_setup(unsigned long dt_ptr) 359{ 360 struct paca_struct *lpaca = get_paca(); 361 static struct machdep_calls **mach; 362 363 /* 364 * Enable early debugging if any specified (see top of 365 * this file) 366 */ 367 EARLY_DEBUG_INIT(); 368 369 DBG(" -> early_setup()\n"); 370 371 /* 372 * Fill the default DBG level (do we want to keep 373 * that old mecanism around forever ?) 374 */ 375 ppcdbg_initialize(); 376 377 /* 378 * Do early initializations using the flattened device 379 * tree, like retreiving the physical memory map or 380 * calculating/retreiving the hash table size 381 */ 382 early_init_devtree(__va(dt_ptr)); 383 384 /* 385 * Iterate all ppc_md structures until we find the proper 386 * one for the current machine type 387 */ 388 DBG("Probing machine type for platform %x...\n", 389 systemcfg->platform); 390 391 for (mach = machines; *mach; mach++) { 392 if ((*mach)->probe(systemcfg->platform)) 393 break; 394 } 395 /* What can we do if we didn't find ? */ 396 if (*mach == NULL) { 397 DBG("No suitable machine found !\n"); 398 for (;;); 399 } 400 ppc_md = **mach; 401 402 DBG("Found, Initializing memory management...\n"); 403 404 /* 405 * Initialize stab / SLB management 406 */ 407 if (!firmware_has_feature(FW_FEATURE_ISERIES)) 408 stab_initialize(lpaca->stab_real); 409 410 /* 411 * Initialize the MMU Hash table and create the linear mapping 412 * of memory 413 */ 414 htab_initialize(); 415 416 DBG(" <- early_setup()\n"); 417} 418 419 420/* 421 * Initialize some remaining members of the ppc64_caches and systemcfg structures 422 * (at least until we get rid of them completely). This is mostly some 423 * cache informations about the CPU that will be used by cache flush 424 * routines and/or provided to userland 425 */ 426static void __init initialize_cache_info(void) 427{ 428 struct device_node *np; 429 unsigned long num_cpus = 0; 430 431 DBG(" -> initialize_cache_info()\n"); 432 433 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { 434 num_cpus += 1; 435 436 /* We're assuming *all* of the CPUs have the same 437 * d-cache and i-cache sizes... -Peter 438 */ 439 440 if ( num_cpus == 1 ) { 441 u32 *sizep, *lsizep; 442 u32 size, lsize; 443 const char *dc, *ic; 444 445 /* Then read cache informations */ 446 if (systemcfg->platform == PLATFORM_POWERMAC) { 447 dc = "d-cache-block-size"; 448 ic = "i-cache-block-size"; 449 } else { 450 dc = "d-cache-line-size"; 451 ic = "i-cache-line-size"; 452 } 453 454 size = 0; 455 lsize = cur_cpu_spec->dcache_bsize; 456 sizep = (u32 *)get_property(np, "d-cache-size", NULL); 457 if (sizep != NULL) 458 size = *sizep; 459 lsizep = (u32 *) get_property(np, dc, NULL); 460 if (lsizep != NULL) 461 lsize = *lsizep; 462 if (sizep == 0 || lsizep == 0) 463 DBG("Argh, can't find dcache properties ! " 464 "sizep: %p, lsizep: %p\n", sizep, lsizep); 465 466 systemcfg->dcache_size = ppc64_caches.dsize = size; 467 systemcfg->dcache_line_size = 468 ppc64_caches.dline_size = lsize; 469 ppc64_caches.log_dline_size = __ilog2(lsize); 470 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; 471 472 size = 0; 473 lsize = cur_cpu_spec->icache_bsize; 474 sizep = (u32 *)get_property(np, "i-cache-size", NULL); 475 if (sizep != NULL) 476 size = *sizep; 477 lsizep = (u32 *)get_property(np, ic, NULL); 478 if (lsizep != NULL) 479 lsize = *lsizep; 480 if (sizep == 0 || lsizep == 0) 481 DBG("Argh, can't find icache properties ! " 482 "sizep: %p, lsizep: %p\n", sizep, lsizep); 483 484 systemcfg->icache_size = ppc64_caches.isize = size; 485 systemcfg->icache_line_size = 486 ppc64_caches.iline_size = lsize; 487 ppc64_caches.log_iline_size = __ilog2(lsize); 488 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; 489 } 490 } 491 492 /* Add an eye catcher and the systemcfg layout version number */ 493 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); 494 systemcfg->version.major = SYSTEMCFG_MAJOR; 495 systemcfg->version.minor = SYSTEMCFG_MINOR; 496 systemcfg->processor = mfspr(SPRN_PVR); 497 498 DBG(" <- initialize_cache_info()\n"); 499} 500 501static void __init check_for_initrd(void) 502{ 503#ifdef CONFIG_BLK_DEV_INITRD 504 u64 *prop; 505 506 DBG(" -> check_for_initrd()\n"); 507 508 if (of_chosen) { 509 prop = (u64 *)get_property(of_chosen, 510 "linux,initrd-start", NULL); 511 if (prop != NULL) { 512 initrd_start = (unsigned long)__va(*prop); 513 prop = (u64 *)get_property(of_chosen, 514 "linux,initrd-end", NULL); 515 if (prop != NULL) { 516 initrd_end = (unsigned long)__va(*prop); 517 initrd_below_start_ok = 1; 518 } else 519 initrd_start = 0; 520 } 521 } 522 523 /* If we were passed an initrd, set the ROOT_DEV properly if the values 524 * look sensible. If not, clear initrd reference. 525 */ 526 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE && 527 initrd_end > initrd_start) 528 ROOT_DEV = Root_RAM0; 529 else 530 initrd_start = initrd_end = 0; 531 532 if (initrd_start) 533 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 534 535 DBG(" <- check_for_initrd()\n"); 536#endif /* CONFIG_BLK_DEV_INITRD */ 537} 538 539/* 540 * Do some initial setup of the system. The parameters are those which 541 * were passed in from the bootloader. 542 */ 543void __init setup_system(void) 544{ 545 DBG(" -> setup_system()\n"); 546 547 /* 548 * Unflatten the device-tree passed by prom_init or kexec 549 */ 550 unflatten_device_tree(); 551 552 /* 553 * Fill the ppc64_caches & systemcfg structures with informations 554 * retreived from the device-tree. Need to be called before 555 * finish_device_tree() since the later requires some of the 556 * informations filled up here to properly parse the interrupt 557 * tree. 558 * It also sets up the cache line sizes which allows to call 559 * routines like flush_icache_range (used by the hash init 560 * later on). 561 */ 562 initialize_cache_info(); 563 564#ifdef CONFIG_PPC_RTAS 565 /* 566 * Initialize RTAS if available 567 */ 568 rtas_initialize(); 569#endif /* CONFIG_PPC_RTAS */ 570 571 /* 572 * Check if we have an initrd provided via the device-tree 573 */ 574 check_for_initrd(); 575 576 /* 577 * Do some platform specific early initializations, that includes 578 * setting up the hash table pointers. It also sets up some interrupt-mapping 579 * related options that will be used by finish_device_tree() 580 */ 581 ppc_md.init_early(); 582 583 /* 584 * "Finish" the device-tree, that is do the actual parsing of 585 * some of the properties like the interrupt map 586 */ 587 finish_device_tree(); 588 589 /* 590 * Initialize xmon 591 */ 592#ifdef CONFIG_XMON_DEFAULT 593 xmon_init(1); 594#endif 595 /* 596 * Register early console 597 */ 598 register_early_udbg_console(); 599 600 /* Save unparsed command line copy for /proc/cmdline */ 601 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); 602 603 parse_early_param(); 604 605#ifdef CONFIG_SMP 606 /* 607 * iSeries has already initialized the cpu maps at this point. 608 */ 609 setup_cpu_maps(); 610 611 /* Release secondary cpus out of their spinloops at 0x60 now that 612 * we can map physical -> logical CPU ids 613 */ 614 smp_release_cpus(); 615#endif 616 617 printk("Starting Linux PPC64 %s\n", system_utsname.version); 618 619 printk("-----------------------------------------------------\n"); 620 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); 621 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); 622 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); 623 printk("systemcfg = 0x%p\n", systemcfg); 624 printk("systemcfg->platform = 0x%x\n", systemcfg->platform); 625 printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); 626 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); 627 printk("ppc64_caches.dcache_line_size = 0x%x\n", 628 ppc64_caches.dline_size); 629 printk("ppc64_caches.icache_line_size = 0x%x\n", 630 ppc64_caches.iline_size); 631 printk("htab_address = 0x%p\n", htab_address); 632 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); 633 printk("-----------------------------------------------------\n"); 634 635 mm_init_ppc64(); 636 637 DBG(" <- setup_system()\n"); 638} 639 640/* also used by kexec */ 641void machine_shutdown(void) 642{ 643 if (ppc_md.nvram_sync) 644 ppc_md.nvram_sync(); 645} 646 647void machine_restart(char *cmd) 648{ 649 machine_shutdown(); 650 ppc_md.restart(cmd); 651#ifdef CONFIG_SMP 652 smp_send_stop(); 653#endif 654 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 655 local_irq_disable(); 656 while (1) ; 657} 658 659void machine_power_off(void) 660{ 661 machine_shutdown(); 662 ppc_md.power_off(); 663#ifdef CONFIG_SMP 664 smp_send_stop(); 665#endif 666 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 667 local_irq_disable(); 668 while (1) ; 669} 670/* Used by the G5 thermal driver */ 671EXPORT_SYMBOL_GPL(machine_power_off); 672 673void machine_halt(void) 674{ 675 machine_shutdown(); 676 ppc_md.halt(); 677#ifdef CONFIG_SMP 678 smp_send_stop(); 679#endif 680 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 681 local_irq_disable(); 682 while (1) ; 683} 684 685static int ppc64_panic_event(struct notifier_block *this, 686 unsigned long event, void *ptr) 687{ 688 ppc_md.panic((char *)ptr); /* May not return */ 689 return NOTIFY_DONE; 690} 691 692 693#ifdef CONFIG_SMP 694DEFINE_PER_CPU(unsigned int, pvr); 695#endif 696 697static int show_cpuinfo(struct seq_file *m, void *v) 698{ 699 unsigned long cpu_id = (unsigned long)v - 1; 700 unsigned int pvr; 701 unsigned short maj; 702 unsigned short min; 703 704 if (cpu_id == NR_CPUS) { 705 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); 706 707 if (ppc_md.get_cpuinfo != NULL) 708 ppc_md.get_cpuinfo(m); 709 710 return 0; 711 } 712 713 /* We only show online cpus: disable preempt (overzealous, I 714 * knew) to prevent cpu going down. */ 715 preempt_disable(); 716 if (!cpu_online(cpu_id)) { 717 preempt_enable(); 718 return 0; 719 } 720 721#ifdef CONFIG_SMP 722 pvr = per_cpu(pvr, cpu_id); 723#else 724 pvr = mfspr(SPRN_PVR); 725#endif 726 maj = (pvr >> 8) & 0xFF; 727 min = pvr & 0xFF; 728 729 seq_printf(m, "processor\t: %lu\n", cpu_id); 730 seq_printf(m, "cpu\t\t: "); 731 732 if (cur_cpu_spec->pvr_mask) 733 seq_printf(m, "%s", cur_cpu_spec->cpu_name); 734 else 735 seq_printf(m, "unknown (%08x)", pvr); 736 737#ifdef CONFIG_ALTIVEC 738 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 739 seq_printf(m, ", altivec supported"); 740#endif /* CONFIG_ALTIVEC */ 741 742 seq_printf(m, "\n"); 743 744 /* 745 * Assume here that all clock rates are the same in a 746 * smp system. -- Cort 747 */ 748 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000, 749 ppc_proc_freq % 1000000); 750 751 seq_printf(m, "revision\t: %hd.%hd\n\n", maj, min); 752 753 preempt_enable(); 754 return 0; 755} 756 757static void *c_start(struct seq_file *m, loff_t *pos) 758{ 759 return *pos <= NR_CPUS ? (void *)((*pos)+1) : NULL; 760} 761static void *c_next(struct seq_file *m, void *v, loff_t *pos) 762{ 763 ++*pos; 764 return c_start(m, pos); 765} 766static void c_stop(struct seq_file *m, void *v) 767{ 768} 769struct seq_operations cpuinfo_op = { 770 .start =c_start, 771 .next = c_next, 772 .stop = c_stop, 773 .show = show_cpuinfo, 774}; 775 776/* 777 * These three variables are used to save values passed to us by prom_init() 778 * via the device tree. The TCE variables are needed because with a memory_limit 779 * in force we may need to explicitly map the TCE are at the top of RAM. 780 */ 781unsigned long memory_limit; 782unsigned long tce_alloc_start; 783unsigned long tce_alloc_end; 784 785#ifdef CONFIG_PPC_ISERIES 786/* 787 * On iSeries we just parse the mem=X option from the command line. 788 * On pSeries it's a bit more complicated, see prom_init_mem() 789 */ 790static int __init early_parsemem(char *p) 791{ 792 if (!p) 793 return 0; 794 795 memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE); 796 797 return 0; 798} 799early_param("mem", early_parsemem); 800#endif /* CONFIG_PPC_ISERIES */ 801 802#ifdef CONFIG_PPC_MULTIPLATFORM 803static int __init set_preferred_console(void) 804{ 805 struct device_node *prom_stdout = NULL; 806 char *name; 807 u32 *spd; 808 int offset = 0; 809 810 DBG(" -> set_preferred_console()\n"); 811 812 /* The user has requested a console so this is already set up. */ 813 if (strstr(saved_command_line, "console=")) { 814 DBG(" console was specified !\n"); 815 return -EBUSY; 816 } 817 818 if (!of_chosen) { 819 DBG(" of_chosen is NULL !\n"); 820 return -ENODEV; 821 } 822 /* We are getting a weird phandle from OF ... */ 823 /* ... So use the full path instead */ 824 name = (char *)get_property(of_chosen, "linux,stdout-path", NULL); 825 if (name == NULL) { 826 DBG(" no linux,stdout-path !\n"); 827 return -ENODEV; 828 } 829 prom_stdout = of_find_node_by_path(name); 830 if (!prom_stdout) { 831 DBG(" can't find stdout package %s !\n", name); 832 return -ENODEV; 833 } 834 DBG("stdout is %s\n", prom_stdout->full_name); 835 836 name = (char *)get_property(prom_stdout, "name", NULL); 837 if (!name) { 838 DBG(" stdout package has no name !\n"); 839 goto not_found; 840 } 841 spd = (u32 *)get_property(prom_stdout, "current-speed", NULL); 842 843 if (0) 844 ; 845#ifdef CONFIG_SERIAL_8250_CONSOLE 846 else if (strcmp(name, "serial") == 0) { 847 int i; 848 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i); 849 if (i > 8) { 850 switch (reg[1]) { 851 case 0x3f8: 852 offset = 0; 853 break; 854 case 0x2f8: 855 offset = 1; 856 break; 857 case 0x898: 858 offset = 2; 859 break; 860 case 0x890: 861 offset = 3; 862 break; 863 default: 864 /* We dont recognise the serial port */ 865 goto not_found; 866 } 867 } 868 } 869#endif /* CONFIG_SERIAL_8250_CONSOLE */ 870#ifdef CONFIG_PPC_PSERIES 871 else if (strcmp(name, "vty") == 0) { 872 u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL); 873 char *compat = (char *)get_property(prom_stdout, "compatible", NULL); 874 875 if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) { 876 /* Host Virtual Serial Interface */ 877 int offset; 878 switch (reg[0]) { 879 case 0x30000000: 880 offset = 0; 881 break; 882 case 0x30000001: 883 offset = 1; 884 break; 885 default: 886 goto not_found; 887 } 888 of_node_put(prom_stdout); 889 DBG("Found hvsi console at offset %d\n", offset); 890 return add_preferred_console("hvsi", offset, NULL); 891 } else { 892 /* pSeries LPAR virtual console */ 893 of_node_put(prom_stdout); 894 DBG("Found hvc console\n"); 895 return add_preferred_console("hvc", 0, NULL); 896 } 897 } 898#endif /* CONFIG_PPC_PSERIES */ 899#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE 900 else if (strcmp(name, "ch-a") == 0) 901 offset = 0; 902 else if (strcmp(name, "ch-b") == 0) 903 offset = 1; 904#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ 905 else 906 goto not_found; 907 of_node_put(prom_stdout); 908 909 DBG("Found serial console at ttyS%d\n", offset); 910 911 if (spd) { 912 static char __initdata opt[16]; 913 sprintf(opt, "%d", *spd); 914 return add_preferred_console("ttyS", offset, opt); 915 } else 916 return add_preferred_console("ttyS", offset, NULL); 917 918 not_found: 919 DBG("No preferred console found !\n"); 920 of_node_put(prom_stdout); 921 return -ENODEV; 922} 923console_initcall(set_preferred_console); 924#endif /* CONFIG_PPC_MULTIPLATFORM */ 925 926#ifdef CONFIG_IRQSTACKS 927static void __init irqstack_early_init(void) 928{ 929 unsigned int i; 930 931 /* 932 * interrupt stacks must be under 256MB, we cannot afford to take 933 * SLB misses on them. 934 */ 935 for_each_cpu(i) { 936 softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, 937 THREAD_SIZE, 0x10000000)); 938 hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, 939 THREAD_SIZE, 0x10000000)); 940 } 941} 942#else 943#define irqstack_early_init() 944#endif 945 946/* 947 * Stack space used when we detect a bad kernel stack pointer, and 948 * early in SMP boots before relocation is enabled. 949 */ 950static void __init emergency_stack_init(void) 951{ 952 unsigned long limit; 953 unsigned int i; 954 955 /* 956 * Emergency stacks must be under 256MB, we cannot afford to take 957 * SLB misses on them. The ABI also requires them to be 128-byte 958 * aligned. 959 * 960 * Since we use these as temporary stacks during secondary CPU 961 * bringup, we need to get at them in real mode. This means they 962 * must also be within the RMO region. 963 */ 964 limit = min(0x10000000UL, lmb.rmo_size); 965 966 for_each_cpu(i) 967 paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128, 968 limit)) + PAGE_SIZE; 969} 970 971/* 972 * Called from setup_arch to initialize the bitmap of available 973 * syscalls in the systemcfg page 974 */ 975void __init setup_syscall_map(void) 976{ 977 unsigned int i, count64 = 0, count32 = 0; 978 extern unsigned long *sys_call_table; 979 extern unsigned long sys_ni_syscall; 980 981 982 for (i = 0; i < __NR_syscalls; i++) { 983 if (sys_call_table[i*2] != sys_ni_syscall) { 984 count64++; 985 systemcfg->syscall_map_64[i >> 5] |= 986 0x80000000UL >> (i & 0x1f); 987 } 988 if (sys_call_table[i*2+1] != sys_ni_syscall) { 989 count32++; 990 systemcfg->syscall_map_32[i >> 5] |= 991 0x80000000UL >> (i & 0x1f); 992 } 993 } 994 printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", 995 count32, count64); 996} 997 998/* 999 * Called into from start_kernel, after lock_kernel has been called. 1000 * Initializes bootmem, which is unsed to manage page allocation until 1001 * mem_init is called. 1002 */ 1003void __init setup_arch(char **cmdline_p) 1004{ 1005 extern void do_init_bootmem(void); 1006 1007 ppc64_boot_msg(0x12, "Setup Arch"); 1008 1009 *cmdline_p = cmd_line; 1010 1011 /* 1012 * Set cache line size based on type of cpu as a default. 1013 * Systems with OF can look in the properties on the cpu node(s) 1014 * for a possibly more accurate value. 1015 */ 1016 dcache_bsize = ppc64_caches.dline_size; 1017 icache_bsize = ppc64_caches.iline_size; 1018 1019 /* reboot on panic */ 1020 panic_timeout = 180; 1021 1022 if (ppc_md.panic) 1023 notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); 1024 1025 init_mm.start_code = PAGE_OFFSET; 1026 init_mm.end_code = (unsigned long) _etext; 1027 init_mm.end_data = (unsigned long) _edata; 1028 init_mm.brk = klimit; 1029 1030 irqstack_early_init(); 1031 emergency_stack_init(); 1032 1033 stabs_alloc(); 1034 1035 /* set up the bootmem stuff with available memory */ 1036 do_init_bootmem(); 1037 sparse_init(); 1038 1039 /* initialize the syscall map in systemcfg */ 1040 setup_syscall_map(); 1041 1042 ppc_md.setup_arch(); 1043 1044 /* Use the default idle loop if the platform hasn't provided one. */ 1045 if (NULL == ppc_md.idle_loop) { 1046 ppc_md.idle_loop = default_idle; 1047 printk(KERN_INFO "Using default idle loop\n"); 1048 } 1049 1050 paging_init(); 1051 ppc64_boot_msg(0x15, "Setup Done"); 1052} 1053 1054 1055/* ToDo: do something useful if ppc_md is not yet setup. */ 1056#define PPC64_LINUX_FUNCTION 0x0f000000 1057#define PPC64_IPL_MESSAGE 0xc0000000 1058#define PPC64_TERM_MESSAGE 0xb0000000 1059 1060static void ppc64_do_msg(unsigned int src, const char *msg) 1061{ 1062 if (ppc_md.progress) { 1063 char buf[128]; 1064 1065 sprintf(buf, "%08X\n", src); 1066 ppc_md.progress(buf, 0); 1067 snprintf(buf, 128, "%s", msg); 1068 ppc_md.progress(buf, 0); 1069 } 1070} 1071 1072/* Print a boot progress message. */ 1073void ppc64_boot_msg(unsigned int src, const char *msg) 1074{ 1075 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); 1076 printk("[boot]%04x %s\n", src, msg); 1077} 1078 1079/* Print a termination message (print only -- does not stop the kernel) */ 1080void ppc64_terminate_msg(unsigned int src, const char *msg) 1081{ 1082 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); 1083 printk("[terminate]%04x %s\n", src, msg); 1084} 1085 1086#ifndef CONFIG_PPC_ISERIES 1087/* 1088 * This function can be used by platforms to "find" legacy serial ports. 1089 * It works for "serial" nodes under an "isa" node, and will try to 1090 * respect the "ibm,aix-loc" property if any. It works with up to 8 1091 * ports. 1092 */ 1093 1094#define MAX_LEGACY_SERIAL_PORTS 8 1095static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; 1096static unsigned int old_serial_count; 1097 1098void __init generic_find_legacy_serial_ports(u64 *physport, 1099 unsigned int *default_speed) 1100{ 1101 struct device_node *np; 1102 u32 *sizeprop; 1103 1104 struct isa_reg_property { 1105 u32 space; 1106 u32 address; 1107 u32 size; 1108 }; 1109 struct pci_reg_property { 1110 struct pci_address addr; 1111 u32 size_hi; 1112 u32 size_lo; 1113 }; 1114 1115 DBG(" -> generic_find_legacy_serial_port()\n"); 1116 1117 *physport = 0; 1118 if (default_speed) 1119 *default_speed = 0; 1120 1121 np = of_find_node_by_path("/"); 1122 if (!np) 1123 return; 1124 1125 /* First fill our array */ 1126 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { 1127 struct device_node *isa, *pci; 1128 struct isa_reg_property *reg; 1129 unsigned long phys_size, addr_size, io_base; 1130 u32 *rangesp; 1131 u32 *interrupts, *clk, *spd; 1132 char *typep; 1133 int index, rlen, rentsize; 1134 1135 /* Ok, first check if it's under an "isa" parent */ 1136 isa = of_get_parent(np); 1137 if (!isa || strcmp(isa->name, "isa")) { 1138 DBG("%s: no isa parent found\n", np->full_name); 1139 continue; 1140 } 1141 1142 /* Now look for an "ibm,aix-loc" property that gives us ordering 1143 * if any... 1144 */ 1145 typep = (char *)get_property(np, "ibm,aix-loc", NULL); 1146 1147 /* Get the ISA port number */ 1148 reg = (struct isa_reg_property *)get_property(np, "reg", NULL); 1149 if (reg == NULL) 1150 goto next_port; 1151 /* We assume the interrupt number isn't translated ... */ 1152 interrupts = (u32 *)get_property(np, "interrupts", NULL); 1153 /* get clock freq. if present */ 1154 clk = (u32 *)get_property(np, "clock-frequency", NULL); 1155 /* get default speed if present */ 1156 spd = (u32 *)get_property(np, "current-speed", NULL); 1157 /* Default to locate at end of array */ 1158 index = old_serial_count; /* end of the array by default */ 1159 1160 /* If we have a location index, then use it */ 1161 if (typep && *typep == 'S') { 1162 index = simple_strtol(typep+1, NULL, 0) - 1; 1163 /* if index is out of range, use end of array instead */ 1164 if (index >= MAX_LEGACY_SERIAL_PORTS) 1165 index = old_serial_count; 1166 /* if our index is still out of range, that mean that 1167 * array is full, we could scan for a free slot but that 1168 * make little sense to bother, just skip the port 1169 */ 1170 if (index >= MAX_LEGACY_SERIAL_PORTS) 1171 goto next_port; 1172 if (index >= old_serial_count) 1173 old_serial_count = index + 1; 1174 /* Check if there is a port who already claimed our slot */ 1175 if (serial_ports[index].iobase != 0) { 1176 /* if we still have some room, move it, else override */ 1177 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { 1178 DBG("Moved legacy port %d -> %d\n", index, 1179 old_serial_count); 1180 serial_ports[old_serial_count++] = 1181 serial_ports[index]; 1182 } else { 1183 DBG("Replacing legacy port %d\n", index); 1184 } 1185 } 1186 } 1187 if (index >= MAX_LEGACY_SERIAL_PORTS) 1188 goto next_port; 1189 if (index >= old_serial_count) 1190 old_serial_count = index + 1; 1191 1192 /* Now fill the entry */ 1193 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); 1194 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; 1195 serial_ports[index].iobase = reg->address; 1196 serial_ports[index].irq = interrupts ? interrupts[0] : 0; 1197 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; 1198 1199 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", 1200 index, 1201 serial_ports[index].iobase, 1202 serial_ports[index].irq, 1203 serial_ports[index].uartclk); 1204 1205 /* Get phys address of IO reg for port 1 */ 1206 if (index != 0) 1207 goto next_port; 1208 1209 pci = of_get_parent(isa); 1210 if (!pci) { 1211 DBG("%s: no pci parent found\n", np->full_name); 1212 goto next_port; 1213 } 1214 1215 rangesp = (u32 *)get_property(pci, "ranges", &rlen); 1216 if (rangesp == NULL) { 1217 of_node_put(pci); 1218 goto next_port; 1219 } 1220 rlen /= 4; 1221 1222 /* we need the #size-cells of the PCI bridge node itself */ 1223 phys_size = 1; 1224 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); 1225 if (sizeprop != NULL) 1226 phys_size = *sizeprop; 1227 /* we need the parent #addr-cells */ 1228 addr_size = prom_n_addr_cells(pci); 1229 rentsize = 3 + addr_size + phys_size; 1230 io_base = 0; 1231 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { 1232 if (((rangesp[0] >> 24) & 0x3) != 1) 1233 continue; /* not IO space */ 1234 io_base = rangesp[3]; 1235 if (addr_size == 2) 1236 io_base = (io_base << 32) | rangesp[4]; 1237 } 1238 if (io_base != 0) { 1239 *physport = io_base + reg->address; 1240 if (default_speed && spd) 1241 *default_speed = *spd; 1242 } 1243 of_node_put(pci); 1244 next_port: 1245 of_node_put(isa); 1246 } 1247 1248 DBG(" <- generic_find_legacy_serial_port()\n"); 1249} 1250 1251static struct platform_device serial_device = { 1252 .name = "serial8250", 1253 .id = PLAT8250_DEV_PLATFORM, 1254 .dev = { 1255 .platform_data = serial_ports, 1256 }, 1257}; 1258 1259static int __init serial_dev_init(void) 1260{ 1261 return platform_device_register(&serial_device); 1262} 1263arch_initcall(serial_dev_init); 1264 1265#endif /* CONFIG_PPC_ISERIES */ 1266 1267int check_legacy_ioport(unsigned long base_port) 1268{ 1269 if (ppc_md.check_legacy_ioport == NULL) 1270 return 0; 1271 return ppc_md.check_legacy_ioport(base_port); 1272} 1273EXPORT_SYMBOL(check_legacy_ioport); 1274 1275#ifdef CONFIG_XMON 1276static int __init early_xmon(char *p) 1277{ 1278 /* ensure xmon is enabled */ 1279 if (p) { 1280 if (strncmp(p, "on", 2) == 0) 1281 xmon_init(1); 1282 if (strncmp(p, "off", 3) == 0) 1283 xmon_init(0); 1284 if (strncmp(p, "early", 5) != 0) 1285 return 0; 1286 } 1287 xmon_init(1); 1288 debugger(NULL); 1289 1290 return 0; 1291} 1292early_param("xmon", early_xmon); 1293#endif 1294 1295void cpu_die(void) 1296{ 1297 if (ppc_md.cpu_die) 1298 ppc_md.cpu_die(); 1299} 1300