| 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 | */ |
| 78 | extern void udbg_init_debug_lpar(void); |
| 79 | /* This one is for use on Apple G5 machines |
| 80 | */ |
| 81 | extern void udbg_init_pmac_realmode(void); |
| 82 | /* That's RTAS panel debug */ |
| 83 | extern void call_rtas_display_status_delay(unsigned char c); |
| 84 | /* Here's maple real mode debug */ |
| 85 | extern 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; */ |
| 98 | extern unsigned long klimit; |
| 99 | |
| 100 | extern void mm_init_ppc64(void); |
| 101 | extern void stab_initialize(unsigned long stab); |
| 102 | extern void htab_initialize(void); |
| 103 | extern void early_init_devtree(void *flat_dt); |
| 104 | extern void unflatten_device_tree(void); |
| 105 | |
| 106 | extern void smp_release_cpus(void); |
| 107 | |
| 108 | int have_of = 1; |
| 109 | int boot_cpuid = 0; |
| 110 | int boot_cpuid_phys = 0; |
| 111 | dev_t boot_dev; |
| 112 | u64 ppc64_pft_size; |
| 113 | |
| 114 | struct ppc64_caches ppc64_caches; |
| 115 | EXPORT_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 | */ |
| 121 | int dcache_bsize; |
| 122 | int icache_bsize; |
| 123 | int ucache_bsize; |
| 124 | |
| 125 | /* The main machine-dep calls structure |
| 126 | */ |
| 127 | struct machdep_calls ppc_md; |
| 128 | EXPORT_SYMBOL(ppc_md); |
| 129 | |
| 130 | #ifdef CONFIG_MAGIC_SYSRQ |
| 131 | unsigned long SYSRQ_KEY; |
| 132 | #endif /* CONFIG_MAGIC_SYSRQ */ |
| 133 | |
| 134 | |
| 135 | static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); |
| 136 | static 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 | */ |
| 149 | struct 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 | |
| 160 | static int smt_enabled_cmdline; |
| 161 | |
| 162 | /* Look for ibm,smt-enabled OF option */ |
| 163 | static 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 */ |
| 187 | static 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 | } |
| 201 | early_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 | */ |
| 220 | static 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 | |
| 313 | extern struct machdep_calls pSeries_md; |
| 314 | extern struct machdep_calls pmac_md; |
| 315 | extern struct machdep_calls maple_md; |
| 316 | extern struct machdep_calls bpa_md; |
| 317 | extern struct machdep_calls iseries_md; |
| 318 | |
| 319 | /* Ultimately, stuff them in an elf section like initcalls... */ |
| 320 | static 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 | |
| 358 | void __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 | */ |
| 426 | static 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 | |
| 501 | static 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 | */ |
| 543 | void __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 | printk("%s:%d rtas.dev=%p (@ %p)\n", __FILE__, __LINE__, rtas.dev, |
| 571 | &rtas.dev); |
| 572 | |
| 573 | /* |
| 574 | * Check if we have an initrd provided via the device-tree |
| 575 | */ |
| 576 | check_for_initrd(); |
| 577 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 578 | |
| 579 | /* |
| 580 | * Do some platform specific early initializations, that includes |
| 581 | * setting up the hash table pointers. It also sets up some interrupt-mapping |
| 582 | * related options that will be used by finish_device_tree() |
| 583 | */ |
| 584 | ppc_md.init_early(); |
| 585 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 586 | |
| 587 | /* |
| 588 | * "Finish" the device-tree, that is do the actual parsing of |
| 589 | * some of the properties like the interrupt map |
| 590 | */ |
| 591 | finish_device_tree(); |
| 592 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 593 | |
| 594 | /* |
| 595 | * Initialize xmon |
| 596 | */ |
| 597 | #ifdef CONFIG_XMON_DEFAULT |
| 598 | xmon_init(1); |
| 599 | #endif |
| 600 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 601 | /* |
| 602 | * Register early console |
| 603 | */ |
| 604 | register_early_udbg_console(); |
| 605 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 606 | |
| 607 | /* Save unparsed command line copy for /proc/cmdline */ |
| 608 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); |
| 609 | |
| 610 | parse_early_param(); |
| 611 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 612 | |
| 613 | #ifdef CONFIG_SMP |
| 614 | /* |
| 615 | * iSeries has already initialized the cpu maps at this point. |
| 616 | */ |
| 617 | setup_cpu_maps(); |
| 618 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 619 | |
| 620 | /* Release secondary cpus out of their spinloops at 0x60 now that |
| 621 | * we can map physical -> logical CPU ids |
| 622 | */ |
| 623 | smp_release_cpus(); |
| 624 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 625 | #endif |
| 626 | |
| 627 | printk("Starting Linux PPC64 %s\n", system_utsname.version); |
| 628 | |
| 629 | printk("-----------------------------------------------------\n"); |
| 630 | printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); |
| 631 | printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); |
| 632 | printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); |
| 633 | printk("systemcfg = 0x%p\n", systemcfg); |
| 634 | printk("systemcfg->platform = 0x%x\n", systemcfg->platform); |
| 635 | printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); |
| 636 | printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); |
| 637 | printk("ppc64_caches.dcache_line_size = 0x%x\n", |
| 638 | ppc64_caches.dline_size); |
| 639 | printk("ppc64_caches.icache_line_size = 0x%x\n", |
| 640 | ppc64_caches.iline_size); |
| 641 | printk("htab_address = 0x%p\n", htab_address); |
| 642 | printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); |
| 643 | printk("-----------------------------------------------------\n"); |
| 644 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 645 | |
| 646 | mm_init_ppc64(); |
| 647 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 648 | |
| 649 | DBG(" <- setup_system()\n"); |
| 650 | } |
| 651 | |
| 652 | /* also used by kexec */ |
| 653 | void machine_shutdown(void) |
| 654 | { |
| 655 | if (ppc_md.nvram_sync) |
| 656 | ppc_md.nvram_sync(); |
| 657 | } |
| 658 | |
| 659 | void machine_restart(char *cmd) |
| 660 | { |
| 661 | machine_shutdown(); |
| 662 | ppc_md.restart(cmd); |
| 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 | |
| 671 | void machine_power_off(void) |
| 672 | { |
| 673 | machine_shutdown(); |
| 674 | ppc_md.power_off(); |
| 675 | #ifdef CONFIG_SMP |
| 676 | smp_send_stop(); |
| 677 | #endif |
| 678 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); |
| 679 | local_irq_disable(); |
| 680 | while (1) ; |
| 681 | } |
| 682 | /* Used by the G5 thermal driver */ |
| 683 | EXPORT_SYMBOL_GPL(machine_power_off); |
| 684 | |
| 685 | void machine_halt(void) |
| 686 | { |
| 687 | machine_shutdown(); |
| 688 | ppc_md.halt(); |
| 689 | #ifdef CONFIG_SMP |
| 690 | smp_send_stop(); |
| 691 | #endif |
| 692 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); |
| 693 | local_irq_disable(); |
| 694 | while (1) ; |
| 695 | } |
| 696 | |
| 697 | static int ppc64_panic_event(struct notifier_block *this, |
| 698 | unsigned long event, void *ptr) |
| 699 | { |
| 700 | ppc_md.panic((char *)ptr); /* May not return */ |
| 701 | return NOTIFY_DONE; |
| 702 | } |
| 703 | |
| 704 | |
| 705 | #ifdef CONFIG_SMP |
| 706 | DEFINE_PER_CPU(unsigned int, pvr); |
| 707 | #endif |
| 708 | |
| 709 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 710 | { |
| 711 | unsigned long cpu_id = (unsigned long)v - 1; |
| 712 | unsigned int pvr; |
| 713 | unsigned short maj; |
| 714 | unsigned short min; |
| 715 | |
| 716 | if (cpu_id == NR_CPUS) { |
| 717 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); |
| 718 | |
| 719 | if (ppc_md.get_cpuinfo != NULL) |
| 720 | ppc_md.get_cpuinfo(m); |
| 721 | |
| 722 | return 0; |
| 723 | } |
| 724 | |
| 725 | /* We only show online cpus: disable preempt (overzealous, I |
| 726 | * knew) to prevent cpu going down. */ |
| 727 | preempt_disable(); |
| 728 | if (!cpu_online(cpu_id)) { |
| 729 | preempt_enable(); |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | #ifdef CONFIG_SMP |
| 734 | pvr = per_cpu(pvr, cpu_id); |
| 735 | #else |
| 736 | pvr = mfspr(SPRN_PVR); |
| 737 | #endif |
| 738 | maj = (pvr >> 8) & 0xFF; |
| 739 | min = pvr & 0xFF; |
| 740 | |
| 741 | seq_printf(m, "processor\t: %lu\n", cpu_id); |
| 742 | seq_printf(m, "cpu\t\t: "); |
| 743 | |
| 744 | if (cur_cpu_spec->pvr_mask) |
| 745 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); |
| 746 | else |
| 747 | seq_printf(m, "unknown (%08x)", pvr); |
| 748 | |
| 749 | #ifdef CONFIG_ALTIVEC |
| 750 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 751 | seq_printf(m, ", altivec supported"); |
| 752 | #endif /* CONFIG_ALTIVEC */ |
| 753 | |
| 754 | seq_printf(m, "\n"); |
| 755 | |
| 756 | /* |
| 757 | * Assume here that all clock rates are the same in a |
| 758 | * smp system. -- Cort |
| 759 | */ |
| 760 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000, |
| 761 | ppc_proc_freq % 1000000); |
| 762 | |
| 763 | seq_printf(m, "revision\t: %hd.%hd\n\n", maj, min); |
| 764 | |
| 765 | preempt_enable(); |
| 766 | return 0; |
| 767 | } |
| 768 | |
| 769 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 770 | { |
| 771 | return *pos <= NR_CPUS ? (void *)((*pos)+1) : NULL; |
| 772 | } |
| 773 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 774 | { |
| 775 | ++*pos; |
| 776 | return c_start(m, pos); |
| 777 | } |
| 778 | static void c_stop(struct seq_file *m, void *v) |
| 779 | { |
| 780 | } |
| 781 | struct seq_operations cpuinfo_op = { |
| 782 | .start =c_start, |
| 783 | .next = c_next, |
| 784 | .stop = c_stop, |
| 785 | .show = show_cpuinfo, |
| 786 | }; |
| 787 | |
| 788 | /* |
| 789 | * These three variables are used to save values passed to us by prom_init() |
| 790 | * via the device tree. The TCE variables are needed because with a memory_limit |
| 791 | * in force we may need to explicitly map the TCE are at the top of RAM. |
| 792 | */ |
| 793 | unsigned long memory_limit; |
| 794 | unsigned long tce_alloc_start; |
| 795 | unsigned long tce_alloc_end; |
| 796 | |
| 797 | #ifdef CONFIG_PPC_ISERIES |
| 798 | /* |
| 799 | * On iSeries we just parse the mem=X option from the command line. |
| 800 | * On pSeries it's a bit more complicated, see prom_init_mem() |
| 801 | */ |
| 802 | static int __init early_parsemem(char *p) |
| 803 | { |
| 804 | if (!p) |
| 805 | return 0; |
| 806 | |
| 807 | memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE); |
| 808 | |
| 809 | return 0; |
| 810 | } |
| 811 | early_param("mem", early_parsemem); |
| 812 | #endif /* CONFIG_PPC_ISERIES */ |
| 813 | |
| 814 | #ifdef CONFIG_PPC_MULTIPLATFORM |
| 815 | static int __init set_preferred_console(void) |
| 816 | { |
| 817 | struct device_node *prom_stdout = NULL; |
| 818 | char *name; |
| 819 | u32 *spd; |
| 820 | int offset = 0; |
| 821 | |
| 822 | DBG(" -> set_preferred_console()\n"); |
| 823 | |
| 824 | /* The user has requested a console so this is already set up. */ |
| 825 | if (strstr(saved_command_line, "console=")) { |
| 826 | DBG(" console was specified !\n"); |
| 827 | return -EBUSY; |
| 828 | } |
| 829 | |
| 830 | if (!of_chosen) { |
| 831 | DBG(" of_chosen is NULL !\n"); |
| 832 | return -ENODEV; |
| 833 | } |
| 834 | /* We are getting a weird phandle from OF ... */ |
| 835 | /* ... So use the full path instead */ |
| 836 | name = (char *)get_property(of_chosen, "linux,stdout-path", NULL); |
| 837 | if (name == NULL) { |
| 838 | DBG(" no linux,stdout-path !\n"); |
| 839 | return -ENODEV; |
| 840 | } |
| 841 | prom_stdout = of_find_node_by_path(name); |
| 842 | if (!prom_stdout) { |
| 843 | DBG(" can't find stdout package %s !\n", name); |
| 844 | return -ENODEV; |
| 845 | } |
| 846 | DBG("stdout is %s\n", prom_stdout->full_name); |
| 847 | |
| 848 | name = (char *)get_property(prom_stdout, "name", NULL); |
| 849 | if (!name) { |
| 850 | DBG(" stdout package has no name !\n"); |
| 851 | goto not_found; |
| 852 | } |
| 853 | spd = (u32 *)get_property(prom_stdout, "current-speed", NULL); |
| 854 | |
| 855 | if (0) |
| 856 | ; |
| 857 | #ifdef CONFIG_SERIAL_8250_CONSOLE |
| 858 | else if (strcmp(name, "serial") == 0) { |
| 859 | int i; |
| 860 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i); |
| 861 | if (i > 8) { |
| 862 | switch (reg[1]) { |
| 863 | case 0x3f8: |
| 864 | offset = 0; |
| 865 | break; |
| 866 | case 0x2f8: |
| 867 | offset = 1; |
| 868 | break; |
| 869 | case 0x898: |
| 870 | offset = 2; |
| 871 | break; |
| 872 | case 0x890: |
| 873 | offset = 3; |
| 874 | break; |
| 875 | default: |
| 876 | /* We dont recognise the serial port */ |
| 877 | goto not_found; |
| 878 | } |
| 879 | } |
| 880 | } |
| 881 | #endif /* CONFIG_SERIAL_8250_CONSOLE */ |
| 882 | #ifdef CONFIG_PPC_PSERIES |
| 883 | else if (strcmp(name, "vty") == 0) { |
| 884 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL); |
| 885 | char *compat = (char *)get_property(prom_stdout, "compatible", NULL); |
| 886 | |
| 887 | if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) { |
| 888 | /* Host Virtual Serial Interface */ |
| 889 | int offset; |
| 890 | switch (reg[0]) { |
| 891 | case 0x30000000: |
| 892 | offset = 0; |
| 893 | break; |
| 894 | case 0x30000001: |
| 895 | offset = 1; |
| 896 | break; |
| 897 | default: |
| 898 | goto not_found; |
| 899 | } |
| 900 | of_node_put(prom_stdout); |
| 901 | DBG("Found hvsi console at offset %d\n", offset); |
| 902 | return add_preferred_console("hvsi", offset, NULL); |
| 903 | } else { |
| 904 | /* pSeries LPAR virtual console */ |
| 905 | of_node_put(prom_stdout); |
| 906 | DBG("Found hvc console\n"); |
| 907 | return add_preferred_console("hvc", 0, NULL); |
| 908 | } |
| 909 | } |
| 910 | #endif /* CONFIG_PPC_PSERIES */ |
| 911 | #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE |
| 912 | else if (strcmp(name, "ch-a") == 0) |
| 913 | offset = 0; |
| 914 | else if (strcmp(name, "ch-b") == 0) |
| 915 | offset = 1; |
| 916 | #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ |
| 917 | else |
| 918 | goto not_found; |
| 919 | of_node_put(prom_stdout); |
| 920 | |
| 921 | DBG("Found serial console at ttyS%d\n", offset); |
| 922 | |
| 923 | if (spd) { |
| 924 | static char __initdata opt[16]; |
| 925 | sprintf(opt, "%d", *spd); |
| 926 | return add_preferred_console("ttyS", offset, opt); |
| 927 | } else |
| 928 | return add_preferred_console("ttyS", offset, NULL); |
| 929 | |
| 930 | not_found: |
| 931 | DBG("No preferred console found !\n"); |
| 932 | of_node_put(prom_stdout); |
| 933 | return -ENODEV; |
| 934 | } |
| 935 | console_initcall(set_preferred_console); |
| 936 | #endif /* CONFIG_PPC_MULTIPLATFORM */ |
| 937 | |
| 938 | #ifdef CONFIG_IRQSTACKS |
| 939 | static void __init irqstack_early_init(void) |
| 940 | { |
| 941 | unsigned int i; |
| 942 | |
| 943 | /* |
| 944 | * interrupt stacks must be under 256MB, we cannot afford to take |
| 945 | * SLB misses on them. |
| 946 | */ |
| 947 | for_each_cpu(i) { |
| 948 | softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, |
| 949 | THREAD_SIZE, 0x10000000)); |
| 950 | hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, |
| 951 | THREAD_SIZE, 0x10000000)); |
| 952 | } |
| 953 | } |
| 954 | #else |
| 955 | #define irqstack_early_init() |
| 956 | #endif |
| 957 | |
| 958 | /* |
| 959 | * Stack space used when we detect a bad kernel stack pointer, and |
| 960 | * early in SMP boots before relocation is enabled. |
| 961 | */ |
| 962 | static void __init emergency_stack_init(void) |
| 963 | { |
| 964 | unsigned long limit; |
| 965 | unsigned int i; |
| 966 | |
| 967 | /* |
| 968 | * Emergency stacks must be under 256MB, we cannot afford to take |
| 969 | * SLB misses on them. The ABI also requires them to be 128-byte |
| 970 | * aligned. |
| 971 | * |
| 972 | * Since we use these as temporary stacks during secondary CPU |
| 973 | * bringup, we need to get at them in real mode. This means they |
| 974 | * must also be within the RMO region. |
| 975 | */ |
| 976 | limit = min(0x10000000UL, lmb.rmo_size); |
| 977 | |
| 978 | for_each_cpu(i) |
| 979 | paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128, |
| 980 | limit)) + PAGE_SIZE; |
| 981 | } |
| 982 | |
| 983 | /* |
| 984 | * Called from setup_arch to initialize the bitmap of available |
| 985 | * syscalls in the systemcfg page |
| 986 | */ |
| 987 | void __init setup_syscall_map(void) |
| 988 | { |
| 989 | unsigned int i, count64 = 0, count32 = 0; |
| 990 | extern unsigned long *sys_call_table; |
| 991 | extern unsigned long sys_ni_syscall; |
| 992 | |
| 993 | |
| 994 | for (i = 0; i < __NR_syscalls; i++) { |
| 995 | if (sys_call_table[i*2] != sys_ni_syscall) { |
| 996 | count64++; |
| 997 | systemcfg->syscall_map_64[i >> 5] |= |
| 998 | 0x80000000UL >> (i & 0x1f); |
| 999 | } |
| 1000 | if (sys_call_table[i*2+1] != sys_ni_syscall) { |
| 1001 | count32++; |
| 1002 | systemcfg->syscall_map_32[i >> 5] |= |
| 1003 | 0x80000000UL >> (i & 0x1f); |
| 1004 | } |
| 1005 | } |
| 1006 | printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", |
| 1007 | count32, count64); |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * Called into from start_kernel, after lock_kernel has been called. |
| 1012 | * Initializes bootmem, which is unsed to manage page allocation until |
| 1013 | * mem_init is called. |
| 1014 | */ |
| 1015 | void __init setup_arch(char **cmdline_p) |
| 1016 | { |
| 1017 | extern void do_init_bootmem(void); |
| 1018 | |
| 1019 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 1020 | ppc64_boot_msg(0x12, "Setup Arch"); |
| 1021 | |
| 1022 | *cmdline_p = cmd_line; |
| 1023 | |
| 1024 | /* |
| 1025 | * Set cache line size based on type of cpu as a default. |
| 1026 | * Systems with OF can look in the properties on the cpu node(s) |
| 1027 | * for a possibly more accurate value. |
| 1028 | */ |
| 1029 | dcache_bsize = ppc64_caches.dline_size; |
| 1030 | icache_bsize = ppc64_caches.iline_size; |
| 1031 | |
| 1032 | /* reboot on panic */ |
| 1033 | panic_timeout = 180; |
| 1034 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 1035 | |
| 1036 | if (ppc_md.panic) |
| 1037 | notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); |
| 1038 | |
| 1039 | init_mm.start_code = PAGE_OFFSET; |
| 1040 | init_mm.end_code = (unsigned long) _etext; |
| 1041 | init_mm.end_data = (unsigned long) _edata; |
| 1042 | init_mm.brk = klimit; |
| 1043 | |
| 1044 | irqstack_early_init(); |
| 1045 | emergency_stack_init(); |
| 1046 | |
| 1047 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 1048 | stabs_alloc(); |
| 1049 | |
| 1050 | /* set up the bootmem stuff with available memory */ |
| 1051 | do_init_bootmem(); |
| 1052 | sparse_init(); |
| 1053 | |
| 1054 | printk("%s:%d rtas.dev=%p\n", __FILE__, __LINE__, rtas.dev); |
| 1055 | /* initialize the syscall map in systemcfg */ |
| 1056 | setup_syscall_map(); |
| 1057 | |
| 1058 | ppc_md.setup_arch(); |
| 1059 | |
| 1060 | /* Use the default idle loop if the platform hasn't provided one. */ |
| 1061 | if (NULL == ppc_md.idle_loop) { |
| 1062 | ppc_md.idle_loop = default_idle; |
| 1063 | printk(KERN_INFO "Using default idle loop\n"); |
| 1064 | } |
| 1065 | |
| 1066 | paging_init(); |
| 1067 | ppc64_boot_msg(0x15, "Setup Done"); |
| 1068 | } |
| 1069 | |
| 1070 | |
| 1071 | /* ToDo: do something useful if ppc_md is not yet setup. */ |
| 1072 | #define PPC64_LINUX_FUNCTION 0x0f000000 |
| 1073 | #define PPC64_IPL_MESSAGE 0xc0000000 |
| 1074 | #define PPC64_TERM_MESSAGE 0xb0000000 |
| 1075 | |
| 1076 | static void ppc64_do_msg(unsigned int src, const char *msg) |
| 1077 | { |
| 1078 | if (ppc_md.progress) { |
| 1079 | char buf[128]; |
| 1080 | |
| 1081 | sprintf(buf, "%08X\n", src); |
| 1082 | ppc_md.progress(buf, 0); |
| 1083 | snprintf(buf, 128, "%s", msg); |
| 1084 | ppc_md.progress(buf, 0); |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | /* Print a boot progress message. */ |
| 1089 | void ppc64_boot_msg(unsigned int src, const char *msg) |
| 1090 | { |
| 1091 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); |
| 1092 | printk("[boot]%04x %s\n", src, msg); |
| 1093 | } |
| 1094 | |
| 1095 | /* Print a termination message (print only -- does not stop the kernel) */ |
| 1096 | void ppc64_terminate_msg(unsigned int src, const char *msg) |
| 1097 | { |
| 1098 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); |
| 1099 | printk("[terminate]%04x %s\n", src, msg); |
| 1100 | } |
| 1101 | |
| 1102 | /* This should only be called on processor 0 during calibrate decr */ |
| 1103 | void __init setup_default_decr(void) |
| 1104 | { |
| 1105 | struct paca_struct *lpaca = get_paca(); |
| 1106 | |
| 1107 | lpaca->default_decr = tb_ticks_per_jiffy; |
| 1108 | lpaca->next_jiffy_update_tb = get_tb() + tb_ticks_per_jiffy; |
| 1109 | } |
| 1110 | |
| 1111 | #ifndef CONFIG_PPC_ISERIES |
| 1112 | /* |
| 1113 | * This function can be used by platforms to "find" legacy serial ports. |
| 1114 | * It works for "serial" nodes under an "isa" node, and will try to |
| 1115 | * respect the "ibm,aix-loc" property if any. It works with up to 8 |
| 1116 | * ports. |
| 1117 | */ |
| 1118 | |
| 1119 | #define MAX_LEGACY_SERIAL_PORTS 8 |
| 1120 | static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; |
| 1121 | static unsigned int old_serial_count; |
| 1122 | |
| 1123 | void __init generic_find_legacy_serial_ports(u64 *physport, |
| 1124 | unsigned int *default_speed) |
| 1125 | { |
| 1126 | struct device_node *np; |
| 1127 | u32 *sizeprop; |
| 1128 | |
| 1129 | struct isa_reg_property { |
| 1130 | u32 space; |
| 1131 | u32 address; |
| 1132 | u32 size; |
| 1133 | }; |
| 1134 | struct pci_reg_property { |
| 1135 | struct pci_address addr; |
| 1136 | u32 size_hi; |
| 1137 | u32 size_lo; |
| 1138 | }; |
| 1139 | |
| 1140 | DBG(" -> generic_find_legacy_serial_port()\n"); |
| 1141 | |
| 1142 | *physport = 0; |
| 1143 | if (default_speed) |
| 1144 | *default_speed = 0; |
| 1145 | |
| 1146 | np = of_find_node_by_path("/"); |
| 1147 | if (!np) |
| 1148 | return; |
| 1149 | |
| 1150 | /* First fill our array */ |
| 1151 | for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { |
| 1152 | struct device_node *isa, *pci; |
| 1153 | struct isa_reg_property *reg; |
| 1154 | unsigned long phys_size, addr_size, io_base; |
| 1155 | u32 *rangesp; |
| 1156 | u32 *interrupts, *clk, *spd; |
| 1157 | char *typep; |
| 1158 | int index, rlen, rentsize; |
| 1159 | |
| 1160 | /* Ok, first check if it's under an "isa" parent */ |
| 1161 | isa = of_get_parent(np); |
| 1162 | if (!isa || strcmp(isa->name, "isa")) { |
| 1163 | DBG("%s: no isa parent found\n", np->full_name); |
| 1164 | continue; |
| 1165 | } |
| 1166 | |
| 1167 | /* Now look for an "ibm,aix-loc" property that gives us ordering |
| 1168 | * if any... |
| 1169 | */ |
| 1170 | typep = (char *)get_property(np, "ibm,aix-loc", NULL); |
| 1171 | |
| 1172 | /* Get the ISA port number */ |
| 1173 | reg = (struct isa_reg_property *)get_property(np, "reg", NULL); |
| 1174 | if (reg == NULL) |
| 1175 | goto next_port; |
| 1176 | /* We assume the interrupt number isn't translated ... */ |
| 1177 | interrupts = (u32 *)get_property(np, "interrupts", NULL); |
| 1178 | /* get clock freq. if present */ |
| 1179 | clk = (u32 *)get_property(np, "clock-frequency", NULL); |
| 1180 | /* get default speed if present */ |
| 1181 | spd = (u32 *)get_property(np, "current-speed", NULL); |
| 1182 | /* Default to locate at end of array */ |
| 1183 | index = old_serial_count; /* end of the array by default */ |
| 1184 | |
| 1185 | /* If we have a location index, then use it */ |
| 1186 | if (typep && *typep == 'S') { |
| 1187 | index = simple_strtol(typep+1, NULL, 0) - 1; |
| 1188 | /* if index is out of range, use end of array instead */ |
| 1189 | if (index >= MAX_LEGACY_SERIAL_PORTS) |
| 1190 | index = old_serial_count; |
| 1191 | /* if our index is still out of range, that mean that |
| 1192 | * array is full, we could scan for a free slot but that |
| 1193 | * make little sense to bother, just skip the port |
| 1194 | */ |
| 1195 | if (index >= MAX_LEGACY_SERIAL_PORTS) |
| 1196 | goto next_port; |
| 1197 | if (index >= old_serial_count) |
| 1198 | old_serial_count = index + 1; |
| 1199 | /* Check if there is a port who already claimed our slot */ |
| 1200 | if (serial_ports[index].iobase != 0) { |
| 1201 | /* if we still have some room, move it, else override */ |
| 1202 | if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { |
| 1203 | DBG("Moved legacy port %d -> %d\n", index, |
| 1204 | old_serial_count); |
| 1205 | serial_ports[old_serial_count++] = |
| 1206 | serial_ports[index]; |
| 1207 | } else { |
| 1208 | DBG("Replacing legacy port %d\n", index); |
| 1209 | } |
| 1210 | } |
| 1211 | } |
| 1212 | if (index >= MAX_LEGACY_SERIAL_PORTS) |
| 1213 | goto next_port; |
| 1214 | if (index >= old_serial_count) |
| 1215 | old_serial_count = index + 1; |
| 1216 | |
| 1217 | /* Now fill the entry */ |
| 1218 | memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); |
| 1219 | serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; |
| 1220 | serial_ports[index].iobase = reg->address; |
| 1221 | serial_ports[index].irq = interrupts ? interrupts[0] : 0; |
| 1222 | serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; |
| 1223 | |
| 1224 | DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", |
| 1225 | index, |
| 1226 | serial_ports[index].iobase, |
| 1227 | serial_ports[index].irq, |
| 1228 | serial_ports[index].uartclk); |
| 1229 | |
| 1230 | /* Get phys address of IO reg for port 1 */ |
| 1231 | if (index != 0) |
| 1232 | goto next_port; |
| 1233 | |
| 1234 | pci = of_get_parent(isa); |
| 1235 | if (!pci) { |
| 1236 | DBG("%s: no pci parent found\n", np->full_name); |
| 1237 | goto next_port; |
| 1238 | } |
| 1239 | |
| 1240 | rangesp = (u32 *)get_property(pci, "ranges", &rlen); |
| 1241 | if (rangesp == NULL) { |
| 1242 | of_node_put(pci); |
| 1243 | goto next_port; |
| 1244 | } |
| 1245 | rlen /= 4; |
| 1246 | |
| 1247 | /* we need the #size-cells of the PCI bridge node itself */ |
| 1248 | phys_size = 1; |
| 1249 | sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); |
| 1250 | if (sizeprop != NULL) |
| 1251 | phys_size = *sizeprop; |
| 1252 | /* we need the parent #addr-cells */ |
| 1253 | addr_size = prom_n_addr_cells(pci); |
| 1254 | rentsize = 3 + addr_size + phys_size; |
| 1255 | io_base = 0; |
| 1256 | for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { |
| 1257 | if (((rangesp[0] >> 24) & 0x3) != 1) |
| 1258 | continue; /* not IO space */ |
| 1259 | io_base = rangesp[3]; |
| 1260 | if (addr_size == 2) |
| 1261 | io_base = (io_base << 32) | rangesp[4]; |
| 1262 | } |
| 1263 | if (io_base != 0) { |
| 1264 | *physport = io_base + reg->address; |
| 1265 | if (default_speed && spd) |
| 1266 | *default_speed = *spd; |
| 1267 | } |
| 1268 | of_node_put(pci); |
| 1269 | next_port: |
| 1270 | of_node_put(isa); |
| 1271 | } |
| 1272 | |
| 1273 | DBG(" <- generic_find_legacy_serial_port()\n"); |
| 1274 | } |
| 1275 | |
| 1276 | static struct platform_device serial_device = { |
| 1277 | .name = "serial8250", |
| 1278 | .id = PLAT8250_DEV_PLATFORM, |
| 1279 | .dev = { |
| 1280 | .platform_data = serial_ports, |
| 1281 | }, |
| 1282 | }; |
| 1283 | |
| 1284 | static int __init serial_dev_init(void) |
| 1285 | { |
| 1286 | return platform_device_register(&serial_device); |
| 1287 | } |
| 1288 | arch_initcall(serial_dev_init); |
| 1289 | |
| 1290 | #endif /* CONFIG_PPC_ISERIES */ |
| 1291 | |
| 1292 | int check_legacy_ioport(unsigned long base_port) |
| 1293 | { |
| 1294 | if (ppc_md.check_legacy_ioport == NULL) |
| 1295 | return 0; |
| 1296 | return ppc_md.check_legacy_ioport(base_port); |
| 1297 | } |
| 1298 | EXPORT_SYMBOL(check_legacy_ioport); |
| 1299 | |
| 1300 | #ifdef CONFIG_XMON |
| 1301 | static int __init early_xmon(char *p) |
| 1302 | { |
| 1303 | /* ensure xmon is enabled */ |
| 1304 | if (p) { |
| 1305 | if (strncmp(p, "on", 2) == 0) |
| 1306 | xmon_init(1); |
| 1307 | if (strncmp(p, "off", 3) == 0) |
| 1308 | xmon_init(0); |
| 1309 | if (strncmp(p, "early", 5) != 0) |
| 1310 | return 0; |
| 1311 | } |
| 1312 | xmon_init(1); |
| 1313 | debugger(NULL); |
| 1314 | |
| 1315 | return 0; |
| 1316 | } |
| 1317 | early_param("xmon", early_xmon); |
| 1318 | #endif |
| 1319 | |
| 1320 | void cpu_die(void) |
| 1321 | { |
| 1322 | if (ppc_md.cpu_die) |
| 1323 | ppc_md.cpu_die(); |
| 1324 | } |