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40ef8cbc PM |
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 | } |