setup_64.c revision b8f510219edc719d4c305918e16edc578bcfc16f
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/smp.h> 41#include <asm/elf.h> 42#include <asm/machdep.h> 43#include <asm/paca.h> 44#include <asm/ppcdebug.h> 45#include <asm/time.h> 46#include <asm/cputable.h> 47#include <asm/sections.h> 48#include <asm/btext.h> 49#include <asm/nvram.h> 50#include <asm/setup.h> 51#include <asm/system.h> 52#include <asm/rtas.h> 53#include <asm/iommu.h> 54#include <asm/serial.h> 55#include <asm/cache.h> 56#include <asm/page.h> 57#include <asm/mmu.h> 58#include <asm/lmb.h> 59#include <asm/iseries/it_lp_naca.h> 60#include <asm/firmware.h> 61#include <asm/systemcfg.h> 62#include <asm/xmon.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 106int have_of = 1; 107int boot_cpuid = 0; 108int boot_cpuid_phys = 0; 109dev_t boot_dev; 110u64 ppc64_pft_size; 111 112struct ppc64_caches ppc64_caches; 113EXPORT_SYMBOL_GPL(ppc64_caches); 114 115/* 116 * These are used in binfmt_elf.c to put aux entries on the stack 117 * for each elf executable being started. 118 */ 119int dcache_bsize; 120int icache_bsize; 121int ucache_bsize; 122 123/* The main machine-dep calls structure 124 */ 125struct machdep_calls ppc_md; 126EXPORT_SYMBOL(ppc_md); 127 128#ifdef CONFIG_MAGIC_SYSRQ 129unsigned long SYSRQ_KEY; 130#endif /* CONFIG_MAGIC_SYSRQ */ 131 132 133static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); 134static struct notifier_block ppc64_panic_block = { 135 .notifier_call = ppc64_panic_event, 136 .priority = INT_MIN /* may not return; must be done last */ 137}; 138 139#ifdef CONFIG_SMP 140 141static int smt_enabled_cmdline; 142 143/* Look for ibm,smt-enabled OF option */ 144static void check_smt_enabled(void) 145{ 146 struct device_node *dn; 147 char *smt_option; 148 149 /* Allow the command line to overrule the OF option */ 150 if (smt_enabled_cmdline) 151 return; 152 153 dn = of_find_node_by_path("/options"); 154 155 if (dn) { 156 smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); 157 158 if (smt_option) { 159 if (!strcmp(smt_option, "on")) 160 smt_enabled_at_boot = 1; 161 else if (!strcmp(smt_option, "off")) 162 smt_enabled_at_boot = 0; 163 } 164 } 165} 166 167/* Look for smt-enabled= cmdline option */ 168static int __init early_smt_enabled(char *p) 169{ 170 smt_enabled_cmdline = 1; 171 172 if (!p) 173 return 0; 174 175 if (!strcmp(p, "on") || !strcmp(p, "1")) 176 smt_enabled_at_boot = 1; 177 else if (!strcmp(p, "off") || !strcmp(p, "0")) 178 smt_enabled_at_boot = 0; 179 180 return 0; 181} 182early_param("smt-enabled", early_smt_enabled); 183 184/** 185 * setup_cpu_maps - initialize the following cpu maps: 186 * cpu_possible_map 187 * cpu_present_map 188 * cpu_sibling_map 189 * 190 * Having the possible map set up early allows us to restrict allocations 191 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. 192 * 193 * We do not initialize the online map here; cpus set their own bits in 194 * cpu_online_map as they come up. 195 * 196 * This function is valid only for Open Firmware systems. finish_device_tree 197 * must be called before using this. 198 * 199 * While we're here, we may as well set the "physical" cpu ids in the paca. 200 */ 201static void __init setup_cpu_maps(void) 202{ 203 struct device_node *dn = NULL; 204 int cpu = 0; 205 int swap_cpuid = 0; 206 207 check_smt_enabled(); 208 209 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { 210 u32 *intserv; 211 int j, len = sizeof(u32), nthreads; 212 213 intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s", 214 &len); 215 if (!intserv) 216 intserv = (u32 *)get_property(dn, "reg", NULL); 217 218 nthreads = len / sizeof(u32); 219 220 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { 221 cpu_set(cpu, cpu_present_map); 222 set_hard_smp_processor_id(cpu, intserv[j]); 223 224 if (intserv[j] == boot_cpuid_phys) 225 swap_cpuid = cpu; 226 cpu_set(cpu, cpu_possible_map); 227 cpu++; 228 } 229 } 230 231 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that 232 * boot cpu is logical 0. 233 */ 234 if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { 235 u32 tmp; 236 tmp = get_hard_smp_processor_id(0); 237 set_hard_smp_processor_id(0, boot_cpuid_phys); 238 set_hard_smp_processor_id(swap_cpuid, tmp); 239 } 240 241 /* 242 * On pSeries LPAR, we need to know how many cpus 243 * could possibly be added to this partition. 244 */ 245 if (systemcfg->platform == PLATFORM_PSERIES_LPAR && 246 (dn = of_find_node_by_path("/rtas"))) { 247 int num_addr_cell, num_size_cell, maxcpus; 248 unsigned int *ireg; 249 250 num_addr_cell = prom_n_addr_cells(dn); 251 num_size_cell = prom_n_size_cells(dn); 252 253 ireg = (unsigned int *) 254 get_property(dn, "ibm,lrdr-capacity", NULL); 255 256 if (!ireg) 257 goto out; 258 259 maxcpus = ireg[num_addr_cell + num_size_cell]; 260 261 /* Double maxcpus for processors which have SMT capability */ 262 if (cpu_has_feature(CPU_FTR_SMT)) 263 maxcpus *= 2; 264 265 if (maxcpus > NR_CPUS) { 266 printk(KERN_WARNING 267 "Partition configured for %d cpus, " 268 "operating system maximum is %d.\n", 269 maxcpus, NR_CPUS); 270 maxcpus = NR_CPUS; 271 } else 272 printk(KERN_INFO "Partition configured for %d cpus.\n", 273 maxcpus); 274 275 for (cpu = 0; cpu < maxcpus; cpu++) 276 cpu_set(cpu, cpu_possible_map); 277 out: 278 of_node_put(dn); 279 } 280 281 /* 282 * Do the sibling map; assume only two threads per processor. 283 */ 284 for_each_cpu(cpu) { 285 cpu_set(cpu, cpu_sibling_map[cpu]); 286 if (cpu_has_feature(CPU_FTR_SMT)) 287 cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); 288 } 289 290 systemcfg->processorCount = num_present_cpus(); 291} 292#endif /* CONFIG_SMP */ 293 294extern struct machdep_calls pSeries_md; 295extern struct machdep_calls pmac_md; 296extern struct machdep_calls maple_md; 297extern struct machdep_calls cell_md; 298extern struct machdep_calls iseries_md; 299 300/* Ultimately, stuff them in an elf section like initcalls... */ 301static struct machdep_calls __initdata *machines[] = { 302#ifdef CONFIG_PPC_PSERIES 303 &pSeries_md, 304#endif /* CONFIG_PPC_PSERIES */ 305#ifdef CONFIG_PPC_PMAC 306 &pmac_md, 307#endif /* CONFIG_PPC_PMAC */ 308#ifdef CONFIG_PPC_MAPLE 309 &maple_md, 310#endif /* CONFIG_PPC_MAPLE */ 311#ifdef CONFIG_PPC_CELL 312 &cell_md, 313#endif 314#ifdef CONFIG_PPC_ISERIES 315 &iseries_md, 316#endif 317 NULL 318}; 319 320/* 321 * Early initialization entry point. This is called by head.S 322 * with MMU translation disabled. We rely on the "feature" of 323 * the CPU that ignores the top 2 bits of the address in real 324 * mode so we can access kernel globals normally provided we 325 * only toy with things in the RMO region. From here, we do 326 * some early parsing of the device-tree to setup out LMB 327 * data structures, and allocate & initialize the hash table 328 * and segment tables so we can start running with translation 329 * enabled. 330 * 331 * It is this function which will call the probe() callback of 332 * the various platform types and copy the matching one to the 333 * global ppc_md structure. Your platform can eventually do 334 * some very early initializations from the probe() routine, but 335 * this is not recommended, be very careful as, for example, the 336 * device-tree is not accessible via normal means at this point. 337 */ 338 339void __init early_setup(unsigned long dt_ptr) 340{ 341 struct paca_struct *lpaca = get_paca(); 342 static struct machdep_calls **mach; 343 344 /* 345 * Enable early debugging if any specified (see top of 346 * this file) 347 */ 348 EARLY_DEBUG_INIT(); 349 350 DBG(" -> early_setup()\n"); 351 352 /* 353 * Fill the default DBG level (do we want to keep 354 * that old mecanism around forever ?) 355 */ 356 ppcdbg_initialize(); 357 358 /* 359 * Do early initializations using the flattened device 360 * tree, like retreiving the physical memory map or 361 * calculating/retreiving the hash table size 362 */ 363 early_init_devtree(__va(dt_ptr)); 364 365 /* 366 * Iterate all ppc_md structures until we find the proper 367 * one for the current machine type 368 */ 369 DBG("Probing machine type for platform %x...\n", 370 systemcfg->platform); 371 372 for (mach = machines; *mach; mach++) { 373 if ((*mach)->probe(systemcfg->platform)) 374 break; 375 } 376 /* What can we do if we didn't find ? */ 377 if (*mach == NULL) { 378 DBG("No suitable machine found !\n"); 379 for (;;); 380 } 381 ppc_md = **mach; 382 383 DBG("Found, Initializing memory management...\n"); 384 385 /* 386 * Initialize stab / SLB management 387 */ 388 if (!firmware_has_feature(FW_FEATURE_ISERIES)) 389 stab_initialize(lpaca->stab_real); 390 391 /* 392 * Initialize the MMU Hash table and create the linear mapping 393 * of memory 394 */ 395 htab_initialize(); 396 397 DBG(" <- early_setup()\n"); 398} 399 400 401#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC) 402void smp_release_cpus(void) 403{ 404 extern unsigned long __secondary_hold_spinloop; 405 406 DBG(" -> smp_release_cpus()\n"); 407 408 /* All secondary cpus are spinning on a common spinloop, release them 409 * all now so they can start to spin on their individual paca 410 * spinloops. For non SMP kernels, the secondary cpus never get out 411 * of the common spinloop. 412 * This is useless but harmless on iSeries, secondaries are already 413 * waiting on their paca spinloops. */ 414 415 __secondary_hold_spinloop = 1; 416 mb(); 417 418 DBG(" <- smp_release_cpus()\n"); 419} 420#endif /* CONFIG_SMP || CONFIG_KEXEC */ 421 422/* 423 * Initialize some remaining members of the ppc64_caches and systemcfg structures 424 * (at least until we get rid of them completely). This is mostly some 425 * cache informations about the CPU that will be used by cache flush 426 * routines and/or provided to userland 427 */ 428static void __init initialize_cache_info(void) 429{ 430 struct device_node *np; 431 unsigned long num_cpus = 0; 432 433 DBG(" -> initialize_cache_info()\n"); 434 435 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { 436 num_cpus += 1; 437 438 /* We're assuming *all* of the CPUs have the same 439 * d-cache and i-cache sizes... -Peter 440 */ 441 442 if ( num_cpus == 1 ) { 443 u32 *sizep, *lsizep; 444 u32 size, lsize; 445 const char *dc, *ic; 446 447 /* Then read cache informations */ 448 if (systemcfg->platform == PLATFORM_POWERMAC) { 449 dc = "d-cache-block-size"; 450 ic = "i-cache-block-size"; 451 } else { 452 dc = "d-cache-line-size"; 453 ic = "i-cache-line-size"; 454 } 455 456 size = 0; 457 lsize = cur_cpu_spec->dcache_bsize; 458 sizep = (u32 *)get_property(np, "d-cache-size", NULL); 459 if (sizep != NULL) 460 size = *sizep; 461 lsizep = (u32 *) get_property(np, dc, NULL); 462 if (lsizep != NULL) 463 lsize = *lsizep; 464 if (sizep == 0 || lsizep == 0) 465 DBG("Argh, can't find dcache properties ! " 466 "sizep: %p, lsizep: %p\n", sizep, lsizep); 467 468 systemcfg->dcache_size = ppc64_caches.dsize = size; 469 systemcfg->dcache_line_size = 470 ppc64_caches.dline_size = lsize; 471 ppc64_caches.log_dline_size = __ilog2(lsize); 472 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; 473 474 size = 0; 475 lsize = cur_cpu_spec->icache_bsize; 476 sizep = (u32 *)get_property(np, "i-cache-size", NULL); 477 if (sizep != NULL) 478 size = *sizep; 479 lsizep = (u32 *)get_property(np, ic, NULL); 480 if (lsizep != NULL) 481 lsize = *lsizep; 482 if (sizep == 0 || lsizep == 0) 483 DBG("Argh, can't find icache properties ! " 484 "sizep: %p, lsizep: %p\n", sizep, lsizep); 485 486 systemcfg->icache_size = ppc64_caches.isize = size; 487 systemcfg->icache_line_size = 488 ppc64_caches.iline_size = lsize; 489 ppc64_caches.log_iline_size = __ilog2(lsize); 490 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; 491 } 492 } 493 494 /* Add an eye catcher and the systemcfg layout version number */ 495 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); 496 systemcfg->version.major = SYSTEMCFG_MAJOR; 497 systemcfg->version.minor = SYSTEMCFG_MINOR; 498 systemcfg->processor = mfspr(SPRN_PVR); 499 500 DBG(" <- initialize_cache_info()\n"); 501} 502 503static void __init check_for_initrd(void) 504{ 505#ifdef CONFIG_BLK_DEV_INITRD 506 u64 *prop; 507 508 DBG(" -> check_for_initrd()\n"); 509 510 if (of_chosen) { 511 prop = (u64 *)get_property(of_chosen, 512 "linux,initrd-start", NULL); 513 if (prop != NULL) { 514 initrd_start = (unsigned long)__va(*prop); 515 prop = (u64 *)get_property(of_chosen, 516 "linux,initrd-end", NULL); 517 if (prop != NULL) { 518 initrd_end = (unsigned long)__va(*prop); 519 initrd_below_start_ok = 1; 520 } else 521 initrd_start = 0; 522 } 523 } 524 525 /* If we were passed an initrd, set the ROOT_DEV properly if the values 526 * look sensible. If not, clear initrd reference. 527 */ 528 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE && 529 initrd_end > initrd_start) 530 ROOT_DEV = Root_RAM0; 531 else 532 initrd_start = initrd_end = 0; 533 534 if (initrd_start) 535 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 536 537 DBG(" <- check_for_initrd()\n"); 538#endif /* CONFIG_BLK_DEV_INITRD */ 539} 540 541/* 542 * Do some initial setup of the system. The parameters are those which 543 * were passed in from the bootloader. 544 */ 545void __init setup_system(void) 546{ 547 DBG(" -> setup_system()\n"); 548 549 /* 550 * Unflatten the device-tree passed by prom_init or kexec 551 */ 552 unflatten_device_tree(); 553 554 /* 555 * Fill the ppc64_caches & systemcfg structures with informations 556 * retreived from the device-tree. Need to be called before 557 * finish_device_tree() since the later requires some of the 558 * informations filled up here to properly parse the interrupt 559 * tree. 560 * It also sets up the cache line sizes which allows to call 561 * routines like flush_icache_range (used by the hash init 562 * later on). 563 */ 564 initialize_cache_info(); 565 566#ifdef CONFIG_PPC_RTAS 567 /* 568 * Initialize RTAS if available 569 */ 570 rtas_initialize(); 571#endif /* CONFIG_PPC_RTAS */ 572 573 /* 574 * Check if we have an initrd provided via the device-tree 575 */ 576 check_for_initrd(); 577 578 /* 579 * Do some platform specific early initializations, that includes 580 * setting up the hash table pointers. It also sets up some interrupt-mapping 581 * related options that will be used by finish_device_tree() 582 */ 583 ppc_md.init_early(); 584 585 /* 586 * "Finish" the device-tree, that is do the actual parsing of 587 * some of the properties like the interrupt map 588 */ 589 finish_device_tree(); 590 591#ifdef CONFIG_BOOTX_TEXT 592 init_boot_display(); 593#endif 594 595 /* 596 * Initialize xmon 597 */ 598#ifdef CONFIG_XMON_DEFAULT 599 xmon_init(1); 600#endif 601 /* 602 * Register early console 603 */ 604 register_early_udbg_console(); 605 606 /* Save unparsed command line copy for /proc/cmdline */ 607 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); 608 609 parse_early_param(); 610 611#ifdef CONFIG_SMP 612 /* 613 * iSeries has already initialized the cpu maps at this point. 614 */ 615 setup_cpu_maps(); 616 617 /* Release secondary cpus out of their spinloops at 0x60 now that 618 * we can map physical -> logical CPU ids 619 */ 620 smp_release_cpus(); 621#endif 622 623 printk("Starting Linux PPC64 %s\n", system_utsname.version); 624 625 printk("-----------------------------------------------------\n"); 626 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); 627 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); 628 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); 629 printk("systemcfg = 0x%p\n", systemcfg); 630 printk("systemcfg->platform = 0x%x\n", systemcfg->platform); 631 printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); 632 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); 633 printk("ppc64_caches.dcache_line_size = 0x%x\n", 634 ppc64_caches.dline_size); 635 printk("ppc64_caches.icache_line_size = 0x%x\n", 636 ppc64_caches.iline_size); 637 printk("htab_address = 0x%p\n", htab_address); 638 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); 639 printk("-----------------------------------------------------\n"); 640 641 mm_init_ppc64(); 642 643 DBG(" <- setup_system()\n"); 644} 645 646static int ppc64_panic_event(struct notifier_block *this, 647 unsigned long event, void *ptr) 648{ 649 ppc_md.panic((char *)ptr); /* May not return */ 650 return NOTIFY_DONE; 651} 652 653#ifdef CONFIG_IRQSTACKS 654static void __init irqstack_early_init(void) 655{ 656 unsigned int i; 657 658 /* 659 * interrupt stacks must be under 256MB, we cannot afford to take 660 * SLB misses on them. 661 */ 662 for_each_cpu(i) { 663 softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, 664 THREAD_SIZE, 0x10000000)); 665 hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, 666 THREAD_SIZE, 0x10000000)); 667 } 668} 669#else 670#define irqstack_early_init() 671#endif 672 673/* 674 * Stack space used when we detect a bad kernel stack pointer, and 675 * early in SMP boots before relocation is enabled. 676 */ 677static void __init emergency_stack_init(void) 678{ 679 unsigned long limit; 680 unsigned int i; 681 682 /* 683 * Emergency stacks must be under 256MB, we cannot afford to take 684 * SLB misses on them. The ABI also requires them to be 128-byte 685 * aligned. 686 * 687 * Since we use these as temporary stacks during secondary CPU 688 * bringup, we need to get at them in real mode. This means they 689 * must also be within the RMO region. 690 */ 691 limit = min(0x10000000UL, lmb.rmo_size); 692 693 for_each_cpu(i) 694 paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128, 695 limit)) + PAGE_SIZE; 696} 697 698/* 699 * Called from setup_arch to initialize the bitmap of available 700 * syscalls in the systemcfg page 701 */ 702void __init setup_syscall_map(void) 703{ 704 unsigned int i, count64 = 0, count32 = 0; 705 extern unsigned long *sys_call_table; 706 extern unsigned long sys_ni_syscall; 707 708 709 for (i = 0; i < __NR_syscalls; i++) { 710 if (sys_call_table[i*2] != sys_ni_syscall) { 711 count64++; 712 systemcfg->syscall_map_64[i >> 5] |= 713 0x80000000UL >> (i & 0x1f); 714 } 715 if (sys_call_table[i*2+1] != sys_ni_syscall) { 716 count32++; 717 systemcfg->syscall_map_32[i >> 5] |= 718 0x80000000UL >> (i & 0x1f); 719 } 720 } 721 printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", 722 count32, count64); 723} 724 725/* 726 * Called into from start_kernel, after lock_kernel has been called. 727 * Initializes bootmem, which is unsed to manage page allocation until 728 * mem_init is called. 729 */ 730void __init setup_arch(char **cmdline_p) 731{ 732 extern void do_init_bootmem(void); 733 734 ppc64_boot_msg(0x12, "Setup Arch"); 735 736 *cmdline_p = cmd_line; 737 738 /* 739 * Set cache line size based on type of cpu as a default. 740 * Systems with OF can look in the properties on the cpu node(s) 741 * for a possibly more accurate value. 742 */ 743 dcache_bsize = ppc64_caches.dline_size; 744 icache_bsize = ppc64_caches.iline_size; 745 746 /* reboot on panic */ 747 panic_timeout = 180; 748 749 if (ppc_md.panic) 750 notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); 751 752 init_mm.start_code = PAGE_OFFSET; 753 init_mm.end_code = (unsigned long) _etext; 754 init_mm.end_data = (unsigned long) _edata; 755 init_mm.brk = klimit; 756 757 irqstack_early_init(); 758 emergency_stack_init(); 759 760 stabs_alloc(); 761 762 /* set up the bootmem stuff with available memory */ 763 do_init_bootmem(); 764 sparse_init(); 765 766 /* initialize the syscall map in systemcfg */ 767 setup_syscall_map(); 768 769#ifdef CONFIG_DUMMY_CONSOLE 770 conswitchp = &dummy_con; 771#endif 772 773 ppc_md.setup_arch(); 774 775 /* Use the default idle loop if the platform hasn't provided one. */ 776 if (NULL == ppc_md.idle_loop) { 777 ppc_md.idle_loop = default_idle; 778 printk(KERN_INFO "Using default idle loop\n"); 779 } 780 781 paging_init(); 782 ppc64_boot_msg(0x15, "Setup Done"); 783} 784 785 786/* ToDo: do something useful if ppc_md is not yet setup. */ 787#define PPC64_LINUX_FUNCTION 0x0f000000 788#define PPC64_IPL_MESSAGE 0xc0000000 789#define PPC64_TERM_MESSAGE 0xb0000000 790 791static void ppc64_do_msg(unsigned int src, const char *msg) 792{ 793 if (ppc_md.progress) { 794 char buf[128]; 795 796 sprintf(buf, "%08X\n", src); 797 ppc_md.progress(buf, 0); 798 snprintf(buf, 128, "%s", msg); 799 ppc_md.progress(buf, 0); 800 } 801} 802 803/* Print a boot progress message. */ 804void ppc64_boot_msg(unsigned int src, const char *msg) 805{ 806 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); 807 printk("[boot]%04x %s\n", src, msg); 808} 809 810/* Print a termination message (print only -- does not stop the kernel) */ 811void ppc64_terminate_msg(unsigned int src, const char *msg) 812{ 813 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); 814 printk("[terminate]%04x %s\n", src, msg); 815} 816 817#ifndef CONFIG_PPC_ISERIES 818/* 819 * This function can be used by platforms to "find" legacy serial ports. 820 * It works for "serial" nodes under an "isa" node, and will try to 821 * respect the "ibm,aix-loc" property if any. It works with up to 8 822 * ports. 823 */ 824 825#define MAX_LEGACY_SERIAL_PORTS 8 826static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; 827static unsigned int old_serial_count; 828 829void __init generic_find_legacy_serial_ports(u64 *physport, 830 unsigned int *default_speed) 831{ 832 struct device_node *np; 833 u32 *sizeprop; 834 835 struct isa_reg_property { 836 u32 space; 837 u32 address; 838 u32 size; 839 }; 840 struct pci_reg_property { 841 struct pci_address addr; 842 u32 size_hi; 843 u32 size_lo; 844 }; 845 846 DBG(" -> generic_find_legacy_serial_port()\n"); 847 848 *physport = 0; 849 if (default_speed) 850 *default_speed = 0; 851 852 np = of_find_node_by_path("/"); 853 if (!np) 854 return; 855 856 /* First fill our array */ 857 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { 858 struct device_node *isa, *pci; 859 struct isa_reg_property *reg; 860 unsigned long phys_size, addr_size, io_base; 861 u32 *rangesp; 862 u32 *interrupts, *clk, *spd; 863 char *typep; 864 int index, rlen, rentsize; 865 866 /* Ok, first check if it's under an "isa" parent */ 867 isa = of_get_parent(np); 868 if (!isa || strcmp(isa->name, "isa")) { 869 DBG("%s: no isa parent found\n", np->full_name); 870 continue; 871 } 872 873 /* Now look for an "ibm,aix-loc" property that gives us ordering 874 * if any... 875 */ 876 typep = (char *)get_property(np, "ibm,aix-loc", NULL); 877 878 /* Get the ISA port number */ 879 reg = (struct isa_reg_property *)get_property(np, "reg", NULL); 880 if (reg == NULL) 881 goto next_port; 882 /* We assume the interrupt number isn't translated ... */ 883 interrupts = (u32 *)get_property(np, "interrupts", NULL); 884 /* get clock freq. if present */ 885 clk = (u32 *)get_property(np, "clock-frequency", NULL); 886 /* get default speed if present */ 887 spd = (u32 *)get_property(np, "current-speed", NULL); 888 /* Default to locate at end of array */ 889 index = old_serial_count; /* end of the array by default */ 890 891 /* If we have a location index, then use it */ 892 if (typep && *typep == 'S') { 893 index = simple_strtol(typep+1, NULL, 0) - 1; 894 /* if index is out of range, use end of array instead */ 895 if (index >= MAX_LEGACY_SERIAL_PORTS) 896 index = old_serial_count; 897 /* if our index is still out of range, that mean that 898 * array is full, we could scan for a free slot but that 899 * make little sense to bother, just skip the port 900 */ 901 if (index >= MAX_LEGACY_SERIAL_PORTS) 902 goto next_port; 903 if (index >= old_serial_count) 904 old_serial_count = index + 1; 905 /* Check if there is a port who already claimed our slot */ 906 if (serial_ports[index].iobase != 0) { 907 /* if we still have some room, move it, else override */ 908 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { 909 DBG("Moved legacy port %d -> %d\n", index, 910 old_serial_count); 911 serial_ports[old_serial_count++] = 912 serial_ports[index]; 913 } else { 914 DBG("Replacing legacy port %d\n", index); 915 } 916 } 917 } 918 if (index >= MAX_LEGACY_SERIAL_PORTS) 919 goto next_port; 920 if (index >= old_serial_count) 921 old_serial_count = index + 1; 922 923 /* Now fill the entry */ 924 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); 925 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; 926 serial_ports[index].iobase = reg->address; 927 serial_ports[index].irq = interrupts ? interrupts[0] : 0; 928 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; 929 930 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", 931 index, 932 serial_ports[index].iobase, 933 serial_ports[index].irq, 934 serial_ports[index].uartclk); 935 936 /* Get phys address of IO reg for port 1 */ 937 if (index != 0) 938 goto next_port; 939 940 pci = of_get_parent(isa); 941 if (!pci) { 942 DBG("%s: no pci parent found\n", np->full_name); 943 goto next_port; 944 } 945 946 rangesp = (u32 *)get_property(pci, "ranges", &rlen); 947 if (rangesp == NULL) { 948 of_node_put(pci); 949 goto next_port; 950 } 951 rlen /= 4; 952 953 /* we need the #size-cells of the PCI bridge node itself */ 954 phys_size = 1; 955 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); 956 if (sizeprop != NULL) 957 phys_size = *sizeprop; 958 /* we need the parent #addr-cells */ 959 addr_size = prom_n_addr_cells(pci); 960 rentsize = 3 + addr_size + phys_size; 961 io_base = 0; 962 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { 963 if (((rangesp[0] >> 24) & 0x3) != 1) 964 continue; /* not IO space */ 965 io_base = rangesp[3]; 966 if (addr_size == 2) 967 io_base = (io_base << 32) | rangesp[4]; 968 } 969 if (io_base != 0) { 970 *physport = io_base + reg->address; 971 if (default_speed && spd) 972 *default_speed = *spd; 973 } 974 of_node_put(pci); 975 next_port: 976 of_node_put(isa); 977 } 978 979 DBG(" <- generic_find_legacy_serial_port()\n"); 980} 981 982static struct platform_device serial_device = { 983 .name = "serial8250", 984 .id = PLAT8250_DEV_PLATFORM, 985 .dev = { 986 .platform_data = serial_ports, 987 }, 988}; 989 990static int __init serial_dev_init(void) 991{ 992 return platform_device_register(&serial_device); 993} 994arch_initcall(serial_dev_init); 995 996#endif /* CONFIG_PPC_ISERIES */ 997 998int check_legacy_ioport(unsigned long base_port) 999{ 1000 if (ppc_md.check_legacy_ioport == NULL) 1001 return 0; 1002 return ppc_md.check_legacy_ioport(base_port); 1003} 1004EXPORT_SYMBOL(check_legacy_ioport); 1005 1006#ifdef CONFIG_XMON 1007static int __init early_xmon(char *p) 1008{ 1009 /* ensure xmon is enabled */ 1010 if (p) { 1011 if (strncmp(p, "on", 2) == 0) 1012 xmon_init(1); 1013 if (strncmp(p, "off", 3) == 0) 1014 xmon_init(0); 1015 if (strncmp(p, "early", 5) != 0) 1016 return 0; 1017 } 1018 xmon_init(1); 1019 debugger(NULL); 1020 1021 return 0; 1022} 1023early_param("xmon", early_xmon); 1024#endif 1025 1026void cpu_die(void) 1027{ 1028 if (ppc_md.cpu_die) 1029 ppc_md.cpu_die(); 1030} 1031