setup_64.c revision e37bc5df8e96c72f27ec3579499726b656e4e641
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/ItLpNaca.h> 60#include <asm/firmware.h> 61#include <asm/systemcfg.h> 62 63#ifdef DEBUG 64#define DBG(fmt...) udbg_printf(fmt) 65#else 66#define DBG(fmt...) 67#endif 68 69/* 70 * Here are some early debugging facilities. You can enable one 71 * but your kernel will not boot on anything else if you do so 72 */ 73 74/* This one is for use on LPAR machines that support an HVC console 75 * on vterm 0 76 */ 77extern void udbg_init_debug_lpar(void); 78/* This one is for use on Apple G5 machines 79 */ 80extern void udbg_init_pmac_realmode(void); 81/* That's RTAS panel debug */ 82extern void call_rtas_display_status_delay(unsigned char c); 83/* Here's maple real mode debug */ 84extern void udbg_init_maple_realmode(void); 85 86#define EARLY_DEBUG_INIT() do {} while(0) 87 88#if 0 89#define EARLY_DEBUG_INIT() udbg_init_debug_lpar() 90#define EARLY_DEBUG_INIT() udbg_init_maple_realmode() 91#define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() 92#define EARLY_DEBUG_INIT() \ 93 do { udbg_putc = call_rtas_display_status_delay; } while(0) 94#endif 95 96/* extern void *stab; */ 97extern unsigned long klimit; 98 99extern void mm_init_ppc64(void); 100extern void stab_initialize(unsigned long stab); 101extern void htab_initialize(void); 102extern void early_init_devtree(void *flat_dt); 103extern void unflatten_device_tree(void); 104 105extern void smp_release_cpus(void); 106 107int have_of = 1; 108int boot_cpuid = 0; 109int boot_cpuid_phys = 0; 110dev_t boot_dev; 111u64 ppc64_pft_size; 112 113struct ppc64_caches ppc64_caches; 114EXPORT_SYMBOL_GPL(ppc64_caches); 115 116/* 117 * These are used in binfmt_elf.c to put aux entries on the stack 118 * for each elf executable being started. 119 */ 120int dcache_bsize; 121int icache_bsize; 122int ucache_bsize; 123 124/* The main machine-dep calls structure 125 */ 126struct machdep_calls ppc_md; 127EXPORT_SYMBOL(ppc_md); 128 129#ifdef CONFIG_MAGIC_SYSRQ 130unsigned long SYSRQ_KEY; 131#endif /* CONFIG_MAGIC_SYSRQ */ 132 133 134static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); 135static struct notifier_block ppc64_panic_block = { 136 .notifier_call = ppc64_panic_event, 137 .priority = INT_MIN /* may not return; must be done last */ 138}; 139 140#ifdef CONFIG_SMP 141 142static int smt_enabled_cmdline; 143 144/* Look for ibm,smt-enabled OF option */ 145static void check_smt_enabled(void) 146{ 147 struct device_node *dn; 148 char *smt_option; 149 150 /* Allow the command line to overrule the OF option */ 151 if (smt_enabled_cmdline) 152 return; 153 154 dn = of_find_node_by_path("/options"); 155 156 if (dn) { 157 smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); 158 159 if (smt_option) { 160 if (!strcmp(smt_option, "on")) 161 smt_enabled_at_boot = 1; 162 else if (!strcmp(smt_option, "off")) 163 smt_enabled_at_boot = 0; 164 } 165 } 166} 167 168/* Look for smt-enabled= cmdline option */ 169static int __init early_smt_enabled(char *p) 170{ 171 smt_enabled_cmdline = 1; 172 173 if (!p) 174 return 0; 175 176 if (!strcmp(p, "on") || !strcmp(p, "1")) 177 smt_enabled_at_boot = 1; 178 else if (!strcmp(p, "off") || !strcmp(p, "0")) 179 smt_enabled_at_boot = 0; 180 181 return 0; 182} 183early_param("smt-enabled", early_smt_enabled); 184 185/** 186 * setup_cpu_maps - initialize the following cpu maps: 187 * cpu_possible_map 188 * cpu_present_map 189 * cpu_sibling_map 190 * 191 * Having the possible map set up early allows us to restrict allocations 192 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. 193 * 194 * We do not initialize the online map here; cpus set their own bits in 195 * cpu_online_map as they come up. 196 * 197 * This function is valid only for Open Firmware systems. finish_device_tree 198 * must be called before using this. 199 * 200 * While we're here, we may as well set the "physical" cpu ids in the paca. 201 */ 202static void __init setup_cpu_maps(void) 203{ 204 struct device_node *dn = NULL; 205 int cpu = 0; 206 int swap_cpuid = 0; 207 208 check_smt_enabled(); 209 210 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { 211 u32 *intserv; 212 int j, len = sizeof(u32), nthreads; 213 214 intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s", 215 &len); 216 if (!intserv) 217 intserv = (u32 *)get_property(dn, "reg", NULL); 218 219 nthreads = len / sizeof(u32); 220 221 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { 222 cpu_set(cpu, cpu_present_map); 223 set_hard_smp_processor_id(cpu, intserv[j]); 224 225 if (intserv[j] == boot_cpuid_phys) 226 swap_cpuid = cpu; 227 cpu_set(cpu, cpu_possible_map); 228 cpu++; 229 } 230 } 231 232 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that 233 * boot cpu is logical 0. 234 */ 235 if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { 236 u32 tmp; 237 tmp = get_hard_smp_processor_id(0); 238 set_hard_smp_processor_id(0, boot_cpuid_phys); 239 set_hard_smp_processor_id(swap_cpuid, tmp); 240 } 241 242 /* 243 * On pSeries LPAR, we need to know how many cpus 244 * could possibly be added to this partition. 245 */ 246 if (systemcfg->platform == PLATFORM_PSERIES_LPAR && 247 (dn = of_find_node_by_path("/rtas"))) { 248 int num_addr_cell, num_size_cell, maxcpus; 249 unsigned int *ireg; 250 251 num_addr_cell = prom_n_addr_cells(dn); 252 num_size_cell = prom_n_size_cells(dn); 253 254 ireg = (unsigned int *) 255 get_property(dn, "ibm,lrdr-capacity", NULL); 256 257 if (!ireg) 258 goto out; 259 260 maxcpus = ireg[num_addr_cell + num_size_cell]; 261 262 /* Double maxcpus for processors which have SMT capability */ 263 if (cpu_has_feature(CPU_FTR_SMT)) 264 maxcpus *= 2; 265 266 if (maxcpus > NR_CPUS) { 267 printk(KERN_WARNING 268 "Partition configured for %d cpus, " 269 "operating system maximum is %d.\n", 270 maxcpus, NR_CPUS); 271 maxcpus = NR_CPUS; 272 } else 273 printk(KERN_INFO "Partition configured for %d cpus.\n", 274 maxcpus); 275 276 for (cpu = 0; cpu < maxcpus; cpu++) 277 cpu_set(cpu, cpu_possible_map); 278 out: 279 of_node_put(dn); 280 } 281 282 /* 283 * Do the sibling map; assume only two threads per processor. 284 */ 285 for_each_cpu(cpu) { 286 cpu_set(cpu, cpu_sibling_map[cpu]); 287 if (cpu_has_feature(CPU_FTR_SMT)) 288 cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); 289 } 290 291 systemcfg->processorCount = num_present_cpus(); 292} 293#endif /* CONFIG_SMP */ 294 295extern struct machdep_calls pSeries_md; 296extern struct machdep_calls pmac_md; 297extern struct machdep_calls maple_md; 298extern struct machdep_calls bpa_md; 299extern struct machdep_calls iseries_md; 300 301/* Ultimately, stuff them in an elf section like initcalls... */ 302static struct machdep_calls __initdata *machines[] = { 303#ifdef CONFIG_PPC_PSERIES 304 &pSeries_md, 305#endif /* CONFIG_PPC_PSERIES */ 306#ifdef CONFIG_PPC_PMAC 307 &pmac_md, 308#endif /* CONFIG_PPC_PMAC */ 309#ifdef CONFIG_PPC_MAPLE 310 &maple_md, 311#endif /* CONFIG_PPC_MAPLE */ 312#ifdef CONFIG_PPC_BPA 313 &bpa_md, 314#endif 315#ifdef CONFIG_PPC_ISERIES 316 &iseries_md, 317#endif 318 NULL 319}; 320 321/* 322 * Early initialization entry point. This is called by head.S 323 * with MMU translation disabled. We rely on the "feature" of 324 * the CPU that ignores the top 2 bits of the address in real 325 * mode so we can access kernel globals normally provided we 326 * only toy with things in the RMO region. From here, we do 327 * some early parsing of the device-tree to setup out LMB 328 * data structures, and allocate & initialize the hash table 329 * and segment tables so we can start running with translation 330 * enabled. 331 * 332 * It is this function which will call the probe() callback of 333 * the various platform types and copy the matching one to the 334 * global ppc_md structure. Your platform can eventually do 335 * some very early initializations from the probe() routine, but 336 * this is not recommended, be very careful as, for example, the 337 * device-tree is not accessible via normal means at this point. 338 */ 339 340void __init early_setup(unsigned long dt_ptr) 341{ 342 struct paca_struct *lpaca = get_paca(); 343 static struct machdep_calls **mach; 344 345 /* 346 * Enable early debugging if any specified (see top of 347 * this file) 348 */ 349 EARLY_DEBUG_INIT(); 350 351 DBG(" -> early_setup()\n"); 352 353 /* 354 * Fill the default DBG level (do we want to keep 355 * that old mecanism around forever ?) 356 */ 357 ppcdbg_initialize(); 358 359 /* 360 * Do early initializations using the flattened device 361 * tree, like retreiving the physical memory map or 362 * calculating/retreiving the hash table size 363 */ 364 early_init_devtree(__va(dt_ptr)); 365 366 /* 367 * Iterate all ppc_md structures until we find the proper 368 * one for the current machine type 369 */ 370 DBG("Probing machine type for platform %x...\n", 371 systemcfg->platform); 372 373 for (mach = machines; *mach; mach++) { 374 if ((*mach)->probe(systemcfg->platform)) 375 break; 376 } 377 /* What can we do if we didn't find ? */ 378 if (*mach == NULL) { 379 DBG("No suitable machine found !\n"); 380 for (;;); 381 } 382 ppc_md = **mach; 383 384 DBG("Found, Initializing memory management...\n"); 385 386 /* 387 * Initialize stab / SLB management 388 */ 389 if (!firmware_has_feature(FW_FEATURE_ISERIES)) 390 stab_initialize(lpaca->stab_real); 391 392 /* 393 * Initialize the MMU Hash table and create the linear mapping 394 * of memory 395 */ 396 htab_initialize(); 397 398 DBG(" <- early_setup()\n"); 399} 400 401 402/* 403 * Initialize some remaining members of the ppc64_caches and systemcfg structures 404 * (at least until we get rid of them completely). This is mostly some 405 * cache informations about the CPU that will be used by cache flush 406 * routines and/or provided to userland 407 */ 408static void __init initialize_cache_info(void) 409{ 410 struct device_node *np; 411 unsigned long num_cpus = 0; 412 413 DBG(" -> initialize_cache_info()\n"); 414 415 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { 416 num_cpus += 1; 417 418 /* We're assuming *all* of the CPUs have the same 419 * d-cache and i-cache sizes... -Peter 420 */ 421 422 if ( num_cpus == 1 ) { 423 u32 *sizep, *lsizep; 424 u32 size, lsize; 425 const char *dc, *ic; 426 427 /* Then read cache informations */ 428 if (systemcfg->platform == PLATFORM_POWERMAC) { 429 dc = "d-cache-block-size"; 430 ic = "i-cache-block-size"; 431 } else { 432 dc = "d-cache-line-size"; 433 ic = "i-cache-line-size"; 434 } 435 436 size = 0; 437 lsize = cur_cpu_spec->dcache_bsize; 438 sizep = (u32 *)get_property(np, "d-cache-size", NULL); 439 if (sizep != NULL) 440 size = *sizep; 441 lsizep = (u32 *) get_property(np, dc, NULL); 442 if (lsizep != NULL) 443 lsize = *lsizep; 444 if (sizep == 0 || lsizep == 0) 445 DBG("Argh, can't find dcache properties ! " 446 "sizep: %p, lsizep: %p\n", sizep, lsizep); 447 448 systemcfg->dcache_size = ppc64_caches.dsize = size; 449 systemcfg->dcache_line_size = 450 ppc64_caches.dline_size = lsize; 451 ppc64_caches.log_dline_size = __ilog2(lsize); 452 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; 453 454 size = 0; 455 lsize = cur_cpu_spec->icache_bsize; 456 sizep = (u32 *)get_property(np, "i-cache-size", NULL); 457 if (sizep != NULL) 458 size = *sizep; 459 lsizep = (u32 *)get_property(np, ic, NULL); 460 if (lsizep != NULL) 461 lsize = *lsizep; 462 if (sizep == 0 || lsizep == 0) 463 DBG("Argh, can't find icache properties ! " 464 "sizep: %p, lsizep: %p\n", sizep, lsizep); 465 466 systemcfg->icache_size = ppc64_caches.isize = size; 467 systemcfg->icache_line_size = 468 ppc64_caches.iline_size = lsize; 469 ppc64_caches.log_iline_size = __ilog2(lsize); 470 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; 471 } 472 } 473 474 /* Add an eye catcher and the systemcfg layout version number */ 475 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); 476 systemcfg->version.major = SYSTEMCFG_MAJOR; 477 systemcfg->version.minor = SYSTEMCFG_MINOR; 478 systemcfg->processor = mfspr(SPRN_PVR); 479 480 DBG(" <- initialize_cache_info()\n"); 481} 482 483static void __init check_for_initrd(void) 484{ 485#ifdef CONFIG_BLK_DEV_INITRD 486 u64 *prop; 487 488 DBG(" -> check_for_initrd()\n"); 489 490 if (of_chosen) { 491 prop = (u64 *)get_property(of_chosen, 492 "linux,initrd-start", NULL); 493 if (prop != NULL) { 494 initrd_start = (unsigned long)__va(*prop); 495 prop = (u64 *)get_property(of_chosen, 496 "linux,initrd-end", NULL); 497 if (prop != NULL) { 498 initrd_end = (unsigned long)__va(*prop); 499 initrd_below_start_ok = 1; 500 } else 501 initrd_start = 0; 502 } 503 } 504 505 /* If we were passed an initrd, set the ROOT_DEV properly if the values 506 * look sensible. If not, clear initrd reference. 507 */ 508 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE && 509 initrd_end > initrd_start) 510 ROOT_DEV = Root_RAM0; 511 else 512 initrd_start = initrd_end = 0; 513 514 if (initrd_start) 515 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 516 517 DBG(" <- check_for_initrd()\n"); 518#endif /* CONFIG_BLK_DEV_INITRD */ 519} 520 521/* 522 * Do some initial setup of the system. The parameters are those which 523 * were passed in from the bootloader. 524 */ 525void __init setup_system(void) 526{ 527 DBG(" -> setup_system()\n"); 528 529 /* 530 * Unflatten the device-tree passed by prom_init or kexec 531 */ 532 unflatten_device_tree(); 533 534 /* 535 * Fill the ppc64_caches & systemcfg structures with informations 536 * retreived from the device-tree. Need to be called before 537 * finish_device_tree() since the later requires some of the 538 * informations filled up here to properly parse the interrupt 539 * tree. 540 * It also sets up the cache line sizes which allows to call 541 * routines like flush_icache_range (used by the hash init 542 * later on). 543 */ 544 initialize_cache_info(); 545 546#ifdef CONFIG_PPC_RTAS 547 /* 548 * Initialize RTAS if available 549 */ 550 rtas_initialize(); 551#endif /* CONFIG_PPC_RTAS */ 552 553 /* 554 * Check if we have an initrd provided via the device-tree 555 */ 556 check_for_initrd(); 557 558 /* 559 * Do some platform specific early initializations, that includes 560 * setting up the hash table pointers. It also sets up some interrupt-mapping 561 * related options that will be used by finish_device_tree() 562 */ 563 ppc_md.init_early(); 564 565 /* 566 * "Finish" the device-tree, that is do the actual parsing of 567 * some of the properties like the interrupt map 568 */ 569 finish_device_tree(); 570 571#ifdef CONFIG_BOOTX_TEXT 572 init_boot_display(); 573#endif 574 575 /* 576 * Initialize xmon 577 */ 578#ifdef CONFIG_XMON_DEFAULT 579 xmon_init(1); 580#endif 581 /* 582 * Register early console 583 */ 584 register_early_udbg_console(); 585 586 /* Save unparsed command line copy for /proc/cmdline */ 587 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); 588 589 parse_early_param(); 590 591#ifdef CONFIG_SMP 592 /* 593 * iSeries has already initialized the cpu maps at this point. 594 */ 595 setup_cpu_maps(); 596 597 /* Release secondary cpus out of their spinloops at 0x60 now that 598 * we can map physical -> logical CPU ids 599 */ 600 smp_release_cpus(); 601#endif 602 603 printk("Starting Linux PPC64 %s\n", system_utsname.version); 604 605 printk("-----------------------------------------------------\n"); 606 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); 607 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); 608 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); 609 printk("systemcfg = 0x%p\n", systemcfg); 610 printk("systemcfg->platform = 0x%x\n", systemcfg->platform); 611 printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); 612 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); 613 printk("ppc64_caches.dcache_line_size = 0x%x\n", 614 ppc64_caches.dline_size); 615 printk("ppc64_caches.icache_line_size = 0x%x\n", 616 ppc64_caches.iline_size); 617 printk("htab_address = 0x%p\n", htab_address); 618 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); 619 printk("-----------------------------------------------------\n"); 620 621 mm_init_ppc64(); 622 623 DBG(" <- setup_system()\n"); 624} 625 626static int ppc64_panic_event(struct notifier_block *this, 627 unsigned long event, void *ptr) 628{ 629 ppc_md.panic((char *)ptr); /* May not return */ 630 return NOTIFY_DONE; 631} 632 633/* 634 * These three variables are used to save values passed to us by prom_init() 635 * via the device tree. The TCE variables are needed because with a memory_limit 636 * in force we may need to explicitly map the TCE are at the top of RAM. 637 */ 638unsigned long memory_limit; 639unsigned long tce_alloc_start; 640unsigned long tce_alloc_end; 641 642#ifdef CONFIG_PPC_ISERIES 643/* 644 * On iSeries we just parse the mem=X option from the command line. 645 * On pSeries it's a bit more complicated, see prom_init_mem() 646 */ 647static int __init early_parsemem(char *p) 648{ 649 if (!p) 650 return 0; 651 652 memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE); 653 654 return 0; 655} 656early_param("mem", early_parsemem); 657#endif /* CONFIG_PPC_ISERIES */ 658 659#ifdef CONFIG_IRQSTACKS 660static void __init irqstack_early_init(void) 661{ 662 unsigned int i; 663 664 /* 665 * interrupt stacks must be under 256MB, we cannot afford to take 666 * SLB misses on them. 667 */ 668 for_each_cpu(i) { 669 softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, 670 THREAD_SIZE, 0x10000000)); 671 hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, 672 THREAD_SIZE, 0x10000000)); 673 } 674} 675#else 676#define irqstack_early_init() 677#endif 678 679/* 680 * Stack space used when we detect a bad kernel stack pointer, and 681 * early in SMP boots before relocation is enabled. 682 */ 683static void __init emergency_stack_init(void) 684{ 685 unsigned long limit; 686 unsigned int i; 687 688 /* 689 * Emergency stacks must be under 256MB, we cannot afford to take 690 * SLB misses on them. The ABI also requires them to be 128-byte 691 * aligned. 692 * 693 * Since we use these as temporary stacks during secondary CPU 694 * bringup, we need to get at them in real mode. This means they 695 * must also be within the RMO region. 696 */ 697 limit = min(0x10000000UL, lmb.rmo_size); 698 699 for_each_cpu(i) 700 paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128, 701 limit)) + PAGE_SIZE; 702} 703 704extern unsigned long *sys_call_table; 705extern unsigned long sys_ni_syscall; 706#ifdef CONFIG_PPC_MERGE 707#define SYS_CALL_ENTRY64(i) sys_call_table[(i) * 2] 708#define SYS_CALL_ENTRY32(i) sys_call_table[(i) * 2 + 1] 709#else 710extern unsigned long *sys_call_table32; 711#define SYS_CALL_ENTRY64(i) sys_call_table[(i)] 712#define SYS_CALL_ENTRY32(i) sys_call_table32[(i)] 713#endif 714 715/* 716 * Called from setup_arch to initialize the bitmap of available 717 * syscalls in the systemcfg page 718 */ 719void __init setup_syscall_map(void) 720{ 721 unsigned int i, count64 = 0, count32 = 0; 722 723 for (i = 0; i < __NR_syscalls; i++) { 724 if (SYS_CALL_ENTRY64(i) != sys_ni_syscall) { 725 count64++; 726 systemcfg->syscall_map_64[i >> 5] |= 727 0x80000000UL >> (i & 0x1f); 728 } 729 if (SYS_CALL_ENTRY32(i) != sys_ni_syscall) { 730 count32++; 731 systemcfg->syscall_map_32[i >> 5] |= 732 0x80000000UL >> (i & 0x1f); 733 } 734 } 735 printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", 736 count32, count64); 737} 738 739/* 740 * Called into from start_kernel, after lock_kernel has been called. 741 * Initializes bootmem, which is unsed to manage page allocation until 742 * mem_init is called. 743 */ 744void __init setup_arch(char **cmdline_p) 745{ 746 extern void do_init_bootmem(void); 747 748 ppc64_boot_msg(0x12, "Setup Arch"); 749 750 *cmdline_p = cmd_line; 751 752 /* 753 * Set cache line size based on type of cpu as a default. 754 * Systems with OF can look in the properties on the cpu node(s) 755 * for a possibly more accurate value. 756 */ 757 dcache_bsize = ppc64_caches.dline_size; 758 icache_bsize = ppc64_caches.iline_size; 759 760 /* reboot on panic */ 761 panic_timeout = 180; 762 763 if (ppc_md.panic) 764 notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); 765 766 init_mm.start_code = PAGE_OFFSET; 767 init_mm.end_code = (unsigned long) _etext; 768 init_mm.end_data = (unsigned long) _edata; 769 init_mm.brk = klimit; 770 771 irqstack_early_init(); 772 emergency_stack_init(); 773 774 stabs_alloc(); 775 776 /* set up the bootmem stuff with available memory */ 777 do_init_bootmem(); 778 sparse_init(); 779 780 /* initialize the syscall map in systemcfg */ 781 setup_syscall_map(); 782 783#ifdef CONFIG_DUMMY_CONSOLE 784 conswitchp = &dummy_con; 785#endif 786 787 ppc_md.setup_arch(); 788 789 /* Use the default idle loop if the platform hasn't provided one. */ 790 if (NULL == ppc_md.idle_loop) { 791 ppc_md.idle_loop = default_idle; 792 printk(KERN_INFO "Using default idle loop\n"); 793 } 794 795 paging_init(); 796 ppc64_boot_msg(0x15, "Setup Done"); 797} 798 799 800/* ToDo: do something useful if ppc_md is not yet setup. */ 801#define PPC64_LINUX_FUNCTION 0x0f000000 802#define PPC64_IPL_MESSAGE 0xc0000000 803#define PPC64_TERM_MESSAGE 0xb0000000 804 805static void ppc64_do_msg(unsigned int src, const char *msg) 806{ 807 if (ppc_md.progress) { 808 char buf[128]; 809 810 sprintf(buf, "%08X\n", src); 811 ppc_md.progress(buf, 0); 812 snprintf(buf, 128, "%s", msg); 813 ppc_md.progress(buf, 0); 814 } 815} 816 817/* Print a boot progress message. */ 818void ppc64_boot_msg(unsigned int src, const char *msg) 819{ 820 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); 821 printk("[boot]%04x %s\n", src, msg); 822} 823 824/* Print a termination message (print only -- does not stop the kernel) */ 825void ppc64_terminate_msg(unsigned int src, const char *msg) 826{ 827 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); 828 printk("[terminate]%04x %s\n", src, msg); 829} 830 831#ifndef CONFIG_PPC_ISERIES 832/* 833 * This function can be used by platforms to "find" legacy serial ports. 834 * It works for "serial" nodes under an "isa" node, and will try to 835 * respect the "ibm,aix-loc" property if any. It works with up to 8 836 * ports. 837 */ 838 839#define MAX_LEGACY_SERIAL_PORTS 8 840static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; 841static unsigned int old_serial_count; 842 843void __init generic_find_legacy_serial_ports(u64 *physport, 844 unsigned int *default_speed) 845{ 846 struct device_node *np; 847 u32 *sizeprop; 848 849 struct isa_reg_property { 850 u32 space; 851 u32 address; 852 u32 size; 853 }; 854 struct pci_reg_property { 855 struct pci_address addr; 856 u32 size_hi; 857 u32 size_lo; 858 }; 859 860 DBG(" -> generic_find_legacy_serial_port()\n"); 861 862 *physport = 0; 863 if (default_speed) 864 *default_speed = 0; 865 866 np = of_find_node_by_path("/"); 867 if (!np) 868 return; 869 870 /* First fill our array */ 871 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { 872 struct device_node *isa, *pci; 873 struct isa_reg_property *reg; 874 unsigned long phys_size, addr_size, io_base; 875 u32 *rangesp; 876 u32 *interrupts, *clk, *spd; 877 char *typep; 878 int index, rlen, rentsize; 879 880 /* Ok, first check if it's under an "isa" parent */ 881 isa = of_get_parent(np); 882 if (!isa || strcmp(isa->name, "isa")) { 883 DBG("%s: no isa parent found\n", np->full_name); 884 continue; 885 } 886 887 /* Now look for an "ibm,aix-loc" property that gives us ordering 888 * if any... 889 */ 890 typep = (char *)get_property(np, "ibm,aix-loc", NULL); 891 892 /* Get the ISA port number */ 893 reg = (struct isa_reg_property *)get_property(np, "reg", NULL); 894 if (reg == NULL) 895 goto next_port; 896 /* We assume the interrupt number isn't translated ... */ 897 interrupts = (u32 *)get_property(np, "interrupts", NULL); 898 /* get clock freq. if present */ 899 clk = (u32 *)get_property(np, "clock-frequency", NULL); 900 /* get default speed if present */ 901 spd = (u32 *)get_property(np, "current-speed", NULL); 902 /* Default to locate at end of array */ 903 index = old_serial_count; /* end of the array by default */ 904 905 /* If we have a location index, then use it */ 906 if (typep && *typep == 'S') { 907 index = simple_strtol(typep+1, NULL, 0) - 1; 908 /* if index is out of range, use end of array instead */ 909 if (index >= MAX_LEGACY_SERIAL_PORTS) 910 index = old_serial_count; 911 /* if our index is still out of range, that mean that 912 * array is full, we could scan for a free slot but that 913 * make little sense to bother, just skip the port 914 */ 915 if (index >= MAX_LEGACY_SERIAL_PORTS) 916 goto next_port; 917 if (index >= old_serial_count) 918 old_serial_count = index + 1; 919 /* Check if there is a port who already claimed our slot */ 920 if (serial_ports[index].iobase != 0) { 921 /* if we still have some room, move it, else override */ 922 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { 923 DBG("Moved legacy port %d -> %d\n", index, 924 old_serial_count); 925 serial_ports[old_serial_count++] = 926 serial_ports[index]; 927 } else { 928 DBG("Replacing legacy port %d\n", index); 929 } 930 } 931 } 932 if (index >= MAX_LEGACY_SERIAL_PORTS) 933 goto next_port; 934 if (index >= old_serial_count) 935 old_serial_count = index + 1; 936 937 /* Now fill the entry */ 938 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); 939 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; 940 serial_ports[index].iobase = reg->address; 941 serial_ports[index].irq = interrupts ? interrupts[0] : 0; 942 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; 943 944 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", 945 index, 946 serial_ports[index].iobase, 947 serial_ports[index].irq, 948 serial_ports[index].uartclk); 949 950 /* Get phys address of IO reg for port 1 */ 951 if (index != 0) 952 goto next_port; 953 954 pci = of_get_parent(isa); 955 if (!pci) { 956 DBG("%s: no pci parent found\n", np->full_name); 957 goto next_port; 958 } 959 960 rangesp = (u32 *)get_property(pci, "ranges", &rlen); 961 if (rangesp == NULL) { 962 of_node_put(pci); 963 goto next_port; 964 } 965 rlen /= 4; 966 967 /* we need the #size-cells of the PCI bridge node itself */ 968 phys_size = 1; 969 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); 970 if (sizeprop != NULL) 971 phys_size = *sizeprop; 972 /* we need the parent #addr-cells */ 973 addr_size = prom_n_addr_cells(pci); 974 rentsize = 3 + addr_size + phys_size; 975 io_base = 0; 976 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { 977 if (((rangesp[0] >> 24) & 0x3) != 1) 978 continue; /* not IO space */ 979 io_base = rangesp[3]; 980 if (addr_size == 2) 981 io_base = (io_base << 32) | rangesp[4]; 982 } 983 if (io_base != 0) { 984 *physport = io_base + reg->address; 985 if (default_speed && spd) 986 *default_speed = *spd; 987 } 988 of_node_put(pci); 989 next_port: 990 of_node_put(isa); 991 } 992 993 DBG(" <- generic_find_legacy_serial_port()\n"); 994} 995 996static struct platform_device serial_device = { 997 .name = "serial8250", 998 .id = PLAT8250_DEV_PLATFORM, 999 .dev = { 1000 .platform_data = serial_ports, 1001 }, 1002}; 1003 1004static int __init serial_dev_init(void) 1005{ 1006 return platform_device_register(&serial_device); 1007} 1008arch_initcall(serial_dev_init); 1009 1010#endif /* CONFIG_PPC_ISERIES */ 1011 1012int check_legacy_ioport(unsigned long base_port) 1013{ 1014 if (ppc_md.check_legacy_ioport == NULL) 1015 return 0; 1016 return ppc_md.check_legacy_ioport(base_port); 1017} 1018EXPORT_SYMBOL(check_legacy_ioport); 1019 1020#ifdef CONFIG_XMON 1021static int __init early_xmon(char *p) 1022{ 1023 /* ensure xmon is enabled */ 1024 if (p) { 1025 if (strncmp(p, "on", 2) == 0) 1026 xmon_init(1); 1027 if (strncmp(p, "off", 3) == 0) 1028 xmon_init(0); 1029 if (strncmp(p, "early", 5) != 0) 1030 return 0; 1031 } 1032 xmon_init(1); 1033 debugger(NULL); 1034 1035 return 0; 1036} 1037early_param("xmon", early_xmon); 1038#endif 1039 1040void cpu_die(void) 1041{ 1042 if (ppc_md.cpu_die) 1043 ppc_md.cpu_die(); 1044} 1045