setup_64.c revision 593e537b93193d1696809817533ce5ad510445b1
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/time.h> 45#include <asm/cputable.h> 46#include <asm/sections.h> 47#include <asm/btext.h> 48#include <asm/nvram.h> 49#include <asm/setup.h> 50#include <asm/system.h> 51#include <asm/rtas.h> 52#include <asm/iommu.h> 53#include <asm/serial.h> 54#include <asm/cache.h> 55#include <asm/page.h> 56#include <asm/mmu.h> 57#include <asm/lmb.h> 58#include <asm/iseries/it_lp_naca.h> 59#include <asm/firmware.h> 60#include <asm/xmon.h> 61#include <asm/udbg.h> 62#include <asm/kexec.h> 63 64#include "setup.h" 65 66#ifdef DEBUG 67#define DBG(fmt...) udbg_printf(fmt) 68#else 69#define DBG(fmt...) 70#endif 71 72/* 73 * Here are some early debugging facilities. You can enable one 74 * but your kernel will not boot on anything else if you do so 75 */ 76 77/* This one is for use on LPAR machines that support an HVC console 78 * on vterm 0 79 */ 80extern void udbg_init_debug_lpar(void); 81/* This one is for use on Apple G5 machines 82 */ 83extern void udbg_init_pmac_realmode(void); 84/* That's RTAS panel debug */ 85extern void call_rtas_display_status_delay(unsigned char c); 86/* Here's maple real mode debug */ 87extern void udbg_init_maple_realmode(void); 88 89#define EARLY_DEBUG_INIT() do {} while(0) 90 91#if 0 92#define EARLY_DEBUG_INIT() udbg_init_debug_lpar() 93#define EARLY_DEBUG_INIT() udbg_init_maple_realmode() 94#define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() 95#define EARLY_DEBUG_INIT() \ 96 do { udbg_putc = call_rtas_display_status_delay; } while(0) 97#endif 98 99int have_of = 1; 100int boot_cpuid = 0; 101int boot_cpuid_phys = 0; 102dev_t boot_dev; 103u64 ppc64_pft_size; 104 105struct ppc64_caches ppc64_caches; 106EXPORT_SYMBOL_GPL(ppc64_caches); 107 108/* 109 * These are used in binfmt_elf.c to put aux entries on the stack 110 * for each elf executable being started. 111 */ 112int dcache_bsize; 113int icache_bsize; 114int ucache_bsize; 115 116/* The main machine-dep calls structure 117 */ 118struct machdep_calls ppc_md; 119EXPORT_SYMBOL(ppc_md); 120 121#ifdef CONFIG_MAGIC_SYSRQ 122unsigned long SYSRQ_KEY; 123#endif /* CONFIG_MAGIC_SYSRQ */ 124 125 126static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); 127static struct notifier_block ppc64_panic_block = { 128 .notifier_call = ppc64_panic_event, 129 .priority = INT_MIN /* may not return; must be done last */ 130}; 131 132#ifdef CONFIG_SMP 133 134static int smt_enabled_cmdline; 135 136/* Look for ibm,smt-enabled OF option */ 137static void check_smt_enabled(void) 138{ 139 struct device_node *dn; 140 char *smt_option; 141 142 /* Allow the command line to overrule the OF option */ 143 if (smt_enabled_cmdline) 144 return; 145 146 dn = of_find_node_by_path("/options"); 147 148 if (dn) { 149 smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); 150 151 if (smt_option) { 152 if (!strcmp(smt_option, "on")) 153 smt_enabled_at_boot = 1; 154 else if (!strcmp(smt_option, "off")) 155 smt_enabled_at_boot = 0; 156 } 157 } 158} 159 160/* Look for smt-enabled= cmdline option */ 161static int __init early_smt_enabled(char *p) 162{ 163 smt_enabled_cmdline = 1; 164 165 if (!p) 166 return 0; 167 168 if (!strcmp(p, "on") || !strcmp(p, "1")) 169 smt_enabled_at_boot = 1; 170 else if (!strcmp(p, "off") || !strcmp(p, "0")) 171 smt_enabled_at_boot = 0; 172 173 return 0; 174} 175early_param("smt-enabled", early_smt_enabled); 176 177#else 178#define check_smt_enabled() 179#endif /* CONFIG_SMP */ 180 181extern struct machdep_calls pSeries_md; 182extern struct machdep_calls pmac_md; 183extern struct machdep_calls maple_md; 184extern struct machdep_calls cell_md; 185extern struct machdep_calls iseries_md; 186 187/* Ultimately, stuff them in an elf section like initcalls... */ 188static struct machdep_calls __initdata *machines[] = { 189#ifdef CONFIG_PPC_PSERIES 190 &pSeries_md, 191#endif /* CONFIG_PPC_PSERIES */ 192#ifdef CONFIG_PPC_PMAC 193 &pmac_md, 194#endif /* CONFIG_PPC_PMAC */ 195#ifdef CONFIG_PPC_MAPLE 196 &maple_md, 197#endif /* CONFIG_PPC_MAPLE */ 198#ifdef CONFIG_PPC_CELL 199 &cell_md, 200#endif 201#ifdef CONFIG_PPC_ISERIES 202 &iseries_md, 203#endif 204 NULL 205}; 206 207/* 208 * Early initialization entry point. This is called by head.S 209 * with MMU translation disabled. We rely on the "feature" of 210 * the CPU that ignores the top 2 bits of the address in real 211 * mode so we can access kernel globals normally provided we 212 * only toy with things in the RMO region. From here, we do 213 * some early parsing of the device-tree to setup out LMB 214 * data structures, and allocate & initialize the hash table 215 * and segment tables so we can start running with translation 216 * enabled. 217 * 218 * It is this function which will call the probe() callback of 219 * the various platform types and copy the matching one to the 220 * global ppc_md structure. Your platform can eventually do 221 * some very early initializations from the probe() routine, but 222 * this is not recommended, be very careful as, for example, the 223 * device-tree is not accessible via normal means at this point. 224 */ 225 226void __init early_setup(unsigned long dt_ptr) 227{ 228 struct paca_struct *lpaca = get_paca(); 229 static struct machdep_calls **mach; 230 231 /* 232 * Enable early debugging if any specified (see top of 233 * this file) 234 */ 235 EARLY_DEBUG_INIT(); 236 237 DBG(" -> early_setup()\n"); 238 239 /* 240 * Do early initializations using the flattened device 241 * tree, like retreiving the physical memory map or 242 * calculating/retreiving the hash table size 243 */ 244 early_init_devtree(__va(dt_ptr)); 245 246 /* 247 * Iterate all ppc_md structures until we find the proper 248 * one for the current machine type 249 */ 250 DBG("Probing machine type for platform %x...\n", _machine); 251 252 for (mach = machines; *mach; mach++) { 253 if ((*mach)->probe(_machine)) 254 break; 255 } 256 /* What can we do if we didn't find ? */ 257 if (*mach == NULL) { 258 DBG("No suitable machine found !\n"); 259 for (;;); 260 } 261 ppc_md = **mach; 262 263 DBG("Found, Initializing memory management...\n"); 264 265 /* 266 * Initialize the MMU Hash table and create the linear mapping 267 * of memory. Has to be done before stab/slb initialization as 268 * this is currently where the page size encoding is obtained 269 */ 270 htab_initialize(); 271 272 /* 273 * Initialize stab / SLB management except on iSeries 274 */ 275 if (!firmware_has_feature(FW_FEATURE_ISERIES)) { 276 if (cpu_has_feature(CPU_FTR_SLB)) 277 slb_initialize(); 278 else 279 stab_initialize(lpaca->stab_real); 280 } 281 282 DBG(" <- early_setup()\n"); 283} 284 285#ifdef CONFIG_SMP 286void early_setup_secondary(void) 287{ 288 struct paca_struct *lpaca = get_paca(); 289 290 /* Mark enabled in PACA */ 291 lpaca->proc_enabled = 0; 292 293 /* Initialize hash table for that CPU */ 294 htab_initialize_secondary(); 295 296 /* Initialize STAB/SLB. We use a virtual address as it works 297 * in real mode on pSeries and we want a virutal address on 298 * iSeries anyway 299 */ 300 if (cpu_has_feature(CPU_FTR_SLB)) 301 slb_initialize(); 302 else 303 stab_initialize(lpaca->stab_addr); 304} 305 306#endif /* CONFIG_SMP */ 307 308#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC) 309void smp_release_cpus(void) 310{ 311 extern unsigned long __secondary_hold_spinloop; 312 313 DBG(" -> smp_release_cpus()\n"); 314 315 /* All secondary cpus are spinning on a common spinloop, release them 316 * all now so they can start to spin on their individual paca 317 * spinloops. For non SMP kernels, the secondary cpus never get out 318 * of the common spinloop. 319 * This is useless but harmless on iSeries, secondaries are already 320 * waiting on their paca spinloops. */ 321 322 __secondary_hold_spinloop = 1; 323 mb(); 324 325 DBG(" <- smp_release_cpus()\n"); 326} 327#else 328#define smp_release_cpus() 329#endif /* CONFIG_SMP || CONFIG_KEXEC */ 330 331/* 332 * Initialize some remaining members of the ppc64_caches and systemcfg 333 * structures 334 * (at least until we get rid of them completely). This is mostly some 335 * cache informations about the CPU that will be used by cache flush 336 * routines and/or provided to userland 337 */ 338static void __init initialize_cache_info(void) 339{ 340 struct device_node *np; 341 unsigned long num_cpus = 0; 342 343 DBG(" -> initialize_cache_info()\n"); 344 345 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { 346 num_cpus += 1; 347 348 /* We're assuming *all* of the CPUs have the same 349 * d-cache and i-cache sizes... -Peter 350 */ 351 352 if ( num_cpus == 1 ) { 353 u32 *sizep, *lsizep; 354 u32 size, lsize; 355 const char *dc, *ic; 356 357 /* Then read cache informations */ 358 if (_machine == PLATFORM_POWERMAC) { 359 dc = "d-cache-block-size"; 360 ic = "i-cache-block-size"; 361 } else { 362 dc = "d-cache-line-size"; 363 ic = "i-cache-line-size"; 364 } 365 366 size = 0; 367 lsize = cur_cpu_spec->dcache_bsize; 368 sizep = (u32 *)get_property(np, "d-cache-size", NULL); 369 if (sizep != NULL) 370 size = *sizep; 371 lsizep = (u32 *) get_property(np, dc, NULL); 372 if (lsizep != NULL) 373 lsize = *lsizep; 374 if (sizep == 0 || lsizep == 0) 375 DBG("Argh, can't find dcache properties ! " 376 "sizep: %p, lsizep: %p\n", sizep, lsizep); 377 378 ppc64_caches.dsize = size; 379 ppc64_caches.dline_size = lsize; 380 ppc64_caches.log_dline_size = __ilog2(lsize); 381 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; 382 383 size = 0; 384 lsize = cur_cpu_spec->icache_bsize; 385 sizep = (u32 *)get_property(np, "i-cache-size", NULL); 386 if (sizep != NULL) 387 size = *sizep; 388 lsizep = (u32 *)get_property(np, ic, NULL); 389 if (lsizep != NULL) 390 lsize = *lsizep; 391 if (sizep == 0 || lsizep == 0) 392 DBG("Argh, can't find icache properties ! " 393 "sizep: %p, lsizep: %p\n", sizep, lsizep); 394 395 ppc64_caches.isize = size; 396 ppc64_caches.iline_size = lsize; 397 ppc64_caches.log_iline_size = __ilog2(lsize); 398 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; 399 } 400 } 401 402 DBG(" <- initialize_cache_info()\n"); 403} 404 405 406/* 407 * Do some initial setup of the system. The parameters are those which 408 * were passed in from the bootloader. 409 */ 410void __init setup_system(void) 411{ 412 DBG(" -> setup_system()\n"); 413 414 /* 415 * Unflatten the device-tree passed by prom_init or kexec 416 */ 417 unflatten_device_tree(); 418 419#ifdef CONFIG_KEXEC 420 kexec_setup(); /* requires unflattened device tree. */ 421#endif 422 423 /* 424 * Fill the ppc64_caches & systemcfg structures with informations 425 * retreived from the device-tree. Need to be called before 426 * finish_device_tree() since the later requires some of the 427 * informations filled up here to properly parse the interrupt 428 * tree. 429 * It also sets up the cache line sizes which allows to call 430 * routines like flush_icache_range (used by the hash init 431 * later on). 432 */ 433 initialize_cache_info(); 434 435#ifdef CONFIG_PPC_RTAS 436 /* 437 * Initialize RTAS if available 438 */ 439 rtas_initialize(); 440#endif /* CONFIG_PPC_RTAS */ 441 442 /* 443 * Check if we have an initrd provided via the device-tree 444 */ 445 check_for_initrd(); 446 447 /* 448 * Do some platform specific early initializations, that includes 449 * setting up the hash table pointers. It also sets up some interrupt-mapping 450 * related options that will be used by finish_device_tree() 451 */ 452 ppc_md.init_early(); 453 454 /* 455 * "Finish" the device-tree, that is do the actual parsing of 456 * some of the properties like the interrupt map 457 */ 458 finish_device_tree(); 459 460#ifdef CONFIG_BOOTX_TEXT 461 init_boot_display(); 462#endif 463 464 /* 465 * Initialize xmon 466 */ 467#ifdef CONFIG_XMON_DEFAULT 468 xmon_init(1); 469#endif 470 /* 471 * Register early console 472 */ 473 register_early_udbg_console(); 474 475 /* Save unparsed command line copy for /proc/cmdline */ 476 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); 477 478 parse_early_param(); 479 480 check_smt_enabled(); 481 smp_setup_cpu_maps(); 482 483 /* Release secondary cpus out of their spinloops at 0x60 now that 484 * we can map physical -> logical CPU ids 485 */ 486 smp_release_cpus(); 487 488 printk("Starting Linux PPC64 %s\n", system_utsname.version); 489 490 printk("-----------------------------------------------------\n"); 491 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); 492 printk("ppc64_interrupt_controller = 0x%ld\n", 493 ppc64_interrupt_controller); 494 printk("platform = 0x%x\n", _machine); 495 printk("physicalMemorySize = 0x%lx\n", lmb_phys_mem_size()); 496 printk("ppc64_caches.dcache_line_size = 0x%x\n", 497 ppc64_caches.dline_size); 498 printk("ppc64_caches.icache_line_size = 0x%x\n", 499 ppc64_caches.iline_size); 500 printk("htab_address = 0x%p\n", htab_address); 501 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); 502 printk("-----------------------------------------------------\n"); 503 504 mm_init_ppc64(); 505 506 DBG(" <- setup_system()\n"); 507} 508 509static int ppc64_panic_event(struct notifier_block *this, 510 unsigned long event, void *ptr) 511{ 512 ppc_md.panic((char *)ptr); /* May not return */ 513 return NOTIFY_DONE; 514} 515 516#ifdef CONFIG_IRQSTACKS 517static void __init irqstack_early_init(void) 518{ 519 unsigned int i; 520 521 /* 522 * interrupt stacks must be under 256MB, we cannot afford to take 523 * SLB misses on them. 524 */ 525 for_each_cpu(i) { 526 softirq_ctx[i] = (struct thread_info *) 527 __va(lmb_alloc_base(THREAD_SIZE, 528 THREAD_SIZE, 0x10000000)); 529 hardirq_ctx[i] = (struct thread_info *) 530 __va(lmb_alloc_base(THREAD_SIZE, 531 THREAD_SIZE, 0x10000000)); 532 } 533} 534#else 535#define irqstack_early_init() 536#endif 537 538/* 539 * Stack space used when we detect a bad kernel stack pointer, and 540 * early in SMP boots before relocation is enabled. 541 */ 542static void __init emergency_stack_init(void) 543{ 544 unsigned long limit; 545 unsigned int i; 546 547 /* 548 * Emergency stacks must be under 256MB, we cannot afford to take 549 * SLB misses on them. The ABI also requires them to be 128-byte 550 * aligned. 551 * 552 * Since we use these as temporary stacks during secondary CPU 553 * bringup, we need to get at them in real mode. This means they 554 * must also be within the RMO region. 555 */ 556 limit = min(0x10000000UL, lmb.rmo_size); 557 558 for_each_cpu(i) 559 paca[i].emergency_sp = 560 __va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE; 561} 562 563/* 564 * Called into from start_kernel, after lock_kernel has been called. 565 * Initializes bootmem, which is unsed to manage page allocation until 566 * mem_init is called. 567 */ 568void __init setup_arch(char **cmdline_p) 569{ 570 extern void do_init_bootmem(void); 571 572 ppc64_boot_msg(0x12, "Setup Arch"); 573 574 *cmdline_p = cmd_line; 575 576 /* 577 * Set cache line size based on type of cpu as a default. 578 * Systems with OF can look in the properties on the cpu node(s) 579 * for a possibly more accurate value. 580 */ 581 dcache_bsize = ppc64_caches.dline_size; 582 icache_bsize = ppc64_caches.iline_size; 583 584 /* reboot on panic */ 585 panic_timeout = 180; 586 587 if (ppc_md.panic) 588 notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); 589 590 init_mm.start_code = PAGE_OFFSET; 591 init_mm.end_code = (unsigned long) _etext; 592 init_mm.end_data = (unsigned long) _edata; 593 init_mm.brk = klimit; 594 595 irqstack_early_init(); 596 emergency_stack_init(); 597 598 stabs_alloc(); 599 600 /* set up the bootmem stuff with available memory */ 601 do_init_bootmem(); 602 sparse_init(); 603 604#ifdef CONFIG_DUMMY_CONSOLE 605 conswitchp = &dummy_con; 606#endif 607 608 ppc_md.setup_arch(); 609 610 /* Use the default idle loop if the platform hasn't provided one. */ 611 if (NULL == ppc_md.idle_loop) { 612 ppc_md.idle_loop = default_idle; 613 printk(KERN_INFO "Using default idle loop\n"); 614 } 615 616 paging_init(); 617 ppc64_boot_msg(0x15, "Setup Done"); 618} 619 620 621/* ToDo: do something useful if ppc_md is not yet setup. */ 622#define PPC64_LINUX_FUNCTION 0x0f000000 623#define PPC64_IPL_MESSAGE 0xc0000000 624#define PPC64_TERM_MESSAGE 0xb0000000 625 626static void ppc64_do_msg(unsigned int src, const char *msg) 627{ 628 if (ppc_md.progress) { 629 char buf[128]; 630 631 sprintf(buf, "%08X\n", src); 632 ppc_md.progress(buf, 0); 633 snprintf(buf, 128, "%s", msg); 634 ppc_md.progress(buf, 0); 635 } 636} 637 638/* Print a boot progress message. */ 639void ppc64_boot_msg(unsigned int src, const char *msg) 640{ 641 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); 642 printk("[boot]%04x %s\n", src, msg); 643} 644 645/* Print a termination message (print only -- does not stop the kernel) */ 646void ppc64_terminate_msg(unsigned int src, const char *msg) 647{ 648 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); 649 printk("[terminate]%04x %s\n", src, msg); 650} 651 652#ifndef CONFIG_PPC_ISERIES 653/* 654 * This function can be used by platforms to "find" legacy serial ports. 655 * It works for "serial" nodes under an "isa" node, and will try to 656 * respect the "ibm,aix-loc" property if any. It works with up to 8 657 * ports. 658 */ 659 660#define MAX_LEGACY_SERIAL_PORTS 8 661static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; 662static unsigned int old_serial_count; 663 664void __init generic_find_legacy_serial_ports(u64 *physport, 665 unsigned int *default_speed) 666{ 667 struct device_node *np; 668 u32 *sizeprop; 669 670 struct isa_reg_property { 671 u32 space; 672 u32 address; 673 u32 size; 674 }; 675 struct pci_reg_property { 676 struct pci_address addr; 677 u32 size_hi; 678 u32 size_lo; 679 }; 680 681 DBG(" -> generic_find_legacy_serial_port()\n"); 682 683 *physport = 0; 684 if (default_speed) 685 *default_speed = 0; 686 687 np = of_find_node_by_path("/"); 688 if (!np) 689 return; 690 691 /* First fill our array */ 692 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { 693 struct device_node *isa, *pci; 694 struct isa_reg_property *reg; 695 unsigned long phys_size, addr_size, io_base; 696 u32 *rangesp; 697 u32 *interrupts, *clk, *spd; 698 char *typep; 699 int index, rlen, rentsize; 700 701 /* Ok, first check if it's under an "isa" parent */ 702 isa = of_get_parent(np); 703 if (!isa || strcmp(isa->name, "isa")) { 704 DBG("%s: no isa parent found\n", np->full_name); 705 continue; 706 } 707 708 /* Now look for an "ibm,aix-loc" property that gives us ordering 709 * if any... 710 */ 711 typep = (char *)get_property(np, "ibm,aix-loc", NULL); 712 713 /* Get the ISA port number */ 714 reg = (struct isa_reg_property *)get_property(np, "reg", NULL); 715 if (reg == NULL) 716 goto next_port; 717 /* We assume the interrupt number isn't translated ... */ 718 interrupts = (u32 *)get_property(np, "interrupts", NULL); 719 /* get clock freq. if present */ 720 clk = (u32 *)get_property(np, "clock-frequency", NULL); 721 /* get default speed if present */ 722 spd = (u32 *)get_property(np, "current-speed", NULL); 723 /* Default to locate at end of array */ 724 index = old_serial_count; /* end of the array by default */ 725 726 /* If we have a location index, then use it */ 727 if (typep && *typep == 'S') { 728 index = simple_strtol(typep+1, NULL, 0) - 1; 729 /* if index is out of range, use end of array instead */ 730 if (index >= MAX_LEGACY_SERIAL_PORTS) 731 index = old_serial_count; 732 /* if our index is still out of range, that mean that 733 * array is full, we could scan for a free slot but that 734 * make little sense to bother, just skip the port 735 */ 736 if (index >= MAX_LEGACY_SERIAL_PORTS) 737 goto next_port; 738 if (index >= old_serial_count) 739 old_serial_count = index + 1; 740 /* Check if there is a port who already claimed our slot */ 741 if (serial_ports[index].iobase != 0) { 742 /* if we still have some room, move it, else override */ 743 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { 744 DBG("Moved legacy port %d -> %d\n", index, 745 old_serial_count); 746 serial_ports[old_serial_count++] = 747 serial_ports[index]; 748 } else { 749 DBG("Replacing legacy port %d\n", index); 750 } 751 } 752 } 753 if (index >= MAX_LEGACY_SERIAL_PORTS) 754 goto next_port; 755 if (index >= old_serial_count) 756 old_serial_count = index + 1; 757 758 /* Now fill the entry */ 759 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); 760 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; 761 serial_ports[index].iobase = reg->address; 762 serial_ports[index].irq = interrupts ? interrupts[0] : 0; 763 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; 764 765 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", 766 index, 767 serial_ports[index].iobase, 768 serial_ports[index].irq, 769 serial_ports[index].uartclk); 770 771 /* Get phys address of IO reg for port 1 */ 772 if (index != 0) 773 goto next_port; 774 775 pci = of_get_parent(isa); 776 if (!pci) { 777 DBG("%s: no pci parent found\n", np->full_name); 778 goto next_port; 779 } 780 781 rangesp = (u32 *)get_property(pci, "ranges", &rlen); 782 if (rangesp == NULL) { 783 of_node_put(pci); 784 goto next_port; 785 } 786 rlen /= 4; 787 788 /* we need the #size-cells of the PCI bridge node itself */ 789 phys_size = 1; 790 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); 791 if (sizeprop != NULL) 792 phys_size = *sizeprop; 793 /* we need the parent #addr-cells */ 794 addr_size = prom_n_addr_cells(pci); 795 rentsize = 3 + addr_size + phys_size; 796 io_base = 0; 797 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { 798 if (((rangesp[0] >> 24) & 0x3) != 1) 799 continue; /* not IO space */ 800 io_base = rangesp[3]; 801 if (addr_size == 2) 802 io_base = (io_base << 32) | rangesp[4]; 803 } 804 if (io_base != 0) { 805 *physport = io_base + reg->address; 806 if (default_speed && spd) 807 *default_speed = *spd; 808 } 809 of_node_put(pci); 810 next_port: 811 of_node_put(isa); 812 } 813 814 DBG(" <- generic_find_legacy_serial_port()\n"); 815} 816 817static struct platform_device serial_device = { 818 .name = "serial8250", 819 .id = PLAT8250_DEV_PLATFORM, 820 .dev = { 821 .platform_data = serial_ports, 822 }, 823}; 824 825static int __init serial_dev_init(void) 826{ 827 return platform_device_register(&serial_device); 828} 829arch_initcall(serial_dev_init); 830 831#endif /* CONFIG_PPC_ISERIES */ 832 833int check_legacy_ioport(unsigned long base_port) 834{ 835 if (ppc_md.check_legacy_ioport == NULL) 836 return 0; 837 return ppc_md.check_legacy_ioport(base_port); 838} 839EXPORT_SYMBOL(check_legacy_ioport); 840 841void cpu_die(void) 842{ 843 if (ppc_md.cpu_die) 844 ppc_md.cpu_die(); 845} 846