Commit | Line | Data |
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1da177e4 LT |
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/version.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/iSeries/LparData.h> | |
45 | #include <asm/paca.h> | |
46 | #include <asm/ppcdebug.h> | |
47 | #include <asm/time.h> | |
48 | #include <asm/cputable.h> | |
49 | #include <asm/sections.h> | |
50 | #include <asm/btext.h> | |
51 | #include <asm/nvram.h> | |
52 | #include <asm/setup.h> | |
53 | #include <asm/system.h> | |
54 | #include <asm/rtas.h> | |
55 | #include <asm/iommu.h> | |
56 | #include <asm/serial.h> | |
57 | #include <asm/cache.h> | |
58 | #include <asm/page.h> | |
59 | #include <asm/mmu.h> | |
60 | ||
61 | #ifdef DEBUG | |
62 | #define DBG(fmt...) udbg_printf(fmt) | |
63 | #else | |
64 | #define DBG(fmt...) | |
65 | #endif | |
66 | ||
67 | /* | |
68 | * Here are some early debugging facilities. You can enable one | |
69 | * but your kernel will not boot on anything else if you do so | |
70 | */ | |
71 | ||
72 | /* This one is for use on LPAR machines that support an HVC console | |
73 | * on vterm 0 | |
74 | */ | |
75 | extern void udbg_init_debug_lpar(void); | |
76 | /* This one is for use on Apple G5 machines | |
77 | */ | |
78 | extern void udbg_init_pmac_realmode(void); | |
79 | /* That's RTAS panel debug */ | |
80 | extern void call_rtas_display_status_delay(unsigned char c); | |
81 | /* Here's maple real mode debug */ | |
82 | extern void udbg_init_maple_realmode(void); | |
83 | ||
84 | #define EARLY_DEBUG_INIT() do {} while(0) | |
85 | ||
86 | #if 0 | |
87 | #define EARLY_DEBUG_INIT() udbg_init_debug_lpar() | |
88 | #define EARLY_DEBUG_INIT() udbg_init_maple_realmode() | |
89 | #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() | |
90 | #define EARLY_DEBUG_INIT() \ | |
91 | do { ppc_md.udbg_putc = call_rtas_display_status_delay; } while(0) | |
92 | #endif | |
93 | ||
94 | /* extern void *stab; */ | |
95 | extern unsigned long klimit; | |
96 | ||
97 | extern void mm_init_ppc64(void); | |
98 | extern int idle_setup(void); | |
99 | extern void stab_initialize(unsigned long stab); | |
100 | extern void htab_initialize(void); | |
101 | extern void early_init_devtree(void *flat_dt); | |
102 | extern void unflatten_device_tree(void); | |
103 | ||
104 | extern void smp_release_cpus(void); | |
105 | ||
106 | unsigned long decr_overclock = 1; | |
107 | unsigned long decr_overclock_proc0 = 1; | |
108 | unsigned long decr_overclock_set = 0; | |
109 | unsigned long decr_overclock_proc0_set = 0; | |
110 | ||
111 | int have_of = 1; | |
112 | int boot_cpuid = 0; | |
113 | int boot_cpuid_phys = 0; | |
114 | dev_t boot_dev; | |
115 | u64 ppc64_pft_size; | |
116 | u64 ppc64_debug_switch; | |
117 | ||
118 | struct ppc64_caches ppc64_caches; | |
119 | EXPORT_SYMBOL_GPL(ppc64_caches); | |
120 | ||
121 | /* | |
122 | * These are used in binfmt_elf.c to put aux entries on the stack | |
123 | * for each elf executable being started. | |
124 | */ | |
125 | int dcache_bsize; | |
126 | int icache_bsize; | |
127 | int ucache_bsize; | |
128 | ||
129 | /* The main machine-dep calls structure | |
130 | */ | |
131 | struct machdep_calls ppc_md; | |
132 | EXPORT_SYMBOL(ppc_md); | |
133 | ||
134 | #ifdef CONFIG_MAGIC_SYSRQ | |
135 | unsigned long SYSRQ_KEY; | |
136 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
137 | ||
138 | ||
139 | static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); | |
140 | static struct notifier_block ppc64_panic_block = { | |
141 | .notifier_call = ppc64_panic_event, | |
142 | .priority = INT_MIN /* may not return; must be done last */ | |
143 | }; | |
144 | ||
145 | /* | |
146 | * Perhaps we can put the pmac screen_info[] here | |
147 | * on pmac as well so we don't need the ifdef's. | |
148 | * Until we get multiple-console support in here | |
149 | * that is. -- Cort | |
150 | * Maybe tie it to serial consoles, since this is really what | |
151 | * these processors use on existing boards. -- Dan | |
152 | */ | |
153 | struct screen_info screen_info = { | |
154 | .orig_x = 0, | |
155 | .orig_y = 25, | |
156 | .orig_video_cols = 80, | |
157 | .orig_video_lines = 25, | |
158 | .orig_video_isVGA = 1, | |
159 | .orig_video_points = 16 | |
160 | }; | |
161 | ||
162 | /* | |
163 | * Initialize the PPCDBG state. Called before relocation has been enabled. | |
164 | */ | |
165 | void __init ppcdbg_initialize(void) | |
166 | { | |
167 | ppc64_debug_switch = PPC_DEBUG_DEFAULT; /* | PPCDBG_BUSWALK | */ | |
168 | /* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Early boot console based on udbg | |
173 | */ | |
174 | static struct console udbg_console = { | |
175 | .name = "udbg", | |
176 | .write = udbg_console_write, | |
177 | .flags = CON_PRINTBUFFER, | |
178 | .index = -1, | |
179 | }; | |
180 | static int early_console_initialized; | |
181 | ||
182 | void __init disable_early_printk(void) | |
183 | { | |
184 | if (!early_console_initialized) | |
185 | return; | |
186 | unregister_console(&udbg_console); | |
187 | early_console_initialized = 0; | |
188 | } | |
189 | ||
190 | #if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) | |
191 | ||
192 | static int smt_enabled_cmdline; | |
193 | ||
194 | /* Look for ibm,smt-enabled OF option */ | |
195 | static void check_smt_enabled(void) | |
196 | { | |
197 | struct device_node *dn; | |
198 | char *smt_option; | |
199 | ||
200 | /* Allow the command line to overrule the OF option */ | |
201 | if (smt_enabled_cmdline) | |
202 | return; | |
203 | ||
204 | dn = of_find_node_by_path("/options"); | |
205 | ||
206 | if (dn) { | |
207 | smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); | |
208 | ||
209 | if (smt_option) { | |
210 | if (!strcmp(smt_option, "on")) | |
211 | smt_enabled_at_boot = 1; | |
212 | else if (!strcmp(smt_option, "off")) | |
213 | smt_enabled_at_boot = 0; | |
214 | } | |
215 | } | |
216 | } | |
217 | ||
218 | /* Look for smt-enabled= cmdline option */ | |
219 | static int __init early_smt_enabled(char *p) | |
220 | { | |
221 | smt_enabled_cmdline = 1; | |
222 | ||
223 | if (!p) | |
224 | return 0; | |
225 | ||
226 | if (!strcmp(p, "on") || !strcmp(p, "1")) | |
227 | smt_enabled_at_boot = 1; | |
228 | else if (!strcmp(p, "off") || !strcmp(p, "0")) | |
229 | smt_enabled_at_boot = 0; | |
230 | ||
231 | return 0; | |
232 | } | |
233 | early_param("smt-enabled", early_smt_enabled); | |
234 | ||
235 | /** | |
236 | * setup_cpu_maps - initialize the following cpu maps: | |
237 | * cpu_possible_map | |
238 | * cpu_present_map | |
239 | * cpu_sibling_map | |
240 | * | |
241 | * Having the possible map set up early allows us to restrict allocations | |
242 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
243 | * | |
244 | * We do not initialize the online map here; cpus set their own bits in | |
245 | * cpu_online_map as they come up. | |
246 | * | |
247 | * This function is valid only for Open Firmware systems. finish_device_tree | |
248 | * must be called before using this. | |
249 | * | |
250 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
251 | */ | |
252 | static void __init setup_cpu_maps(void) | |
253 | { | |
254 | struct device_node *dn = NULL; | |
255 | int cpu = 0; | |
256 | int swap_cpuid = 0; | |
257 | ||
258 | check_smt_enabled(); | |
259 | ||
260 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
261 | u32 *intserv; | |
262 | int j, len = sizeof(u32), nthreads; | |
263 | ||
264 | intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s", | |
265 | &len); | |
266 | if (!intserv) | |
267 | intserv = (u32 *)get_property(dn, "reg", NULL); | |
268 | ||
269 | nthreads = len / sizeof(u32); | |
270 | ||
271 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
272 | cpu_set(cpu, cpu_present_map); | |
273 | set_hard_smp_processor_id(cpu, intserv[j]); | |
274 | ||
275 | if (intserv[j] == boot_cpuid_phys) | |
276 | swap_cpuid = cpu; | |
277 | cpu_set(cpu, cpu_possible_map); | |
278 | cpu++; | |
279 | } | |
280 | } | |
281 | ||
282 | /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that | |
283 | * boot cpu is logical 0. | |
284 | */ | |
285 | if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { | |
286 | u32 tmp; | |
287 | tmp = get_hard_smp_processor_id(0); | |
288 | set_hard_smp_processor_id(0, boot_cpuid_phys); | |
289 | set_hard_smp_processor_id(swap_cpuid, tmp); | |
290 | } | |
291 | ||
292 | /* | |
293 | * On pSeries LPAR, we need to know how many cpus | |
294 | * could possibly be added to this partition. | |
295 | */ | |
296 | if (systemcfg->platform == PLATFORM_PSERIES_LPAR && | |
297 | (dn = of_find_node_by_path("/rtas"))) { | |
298 | int num_addr_cell, num_size_cell, maxcpus; | |
299 | unsigned int *ireg; | |
300 | ||
301 | num_addr_cell = prom_n_addr_cells(dn); | |
302 | num_size_cell = prom_n_size_cells(dn); | |
303 | ||
304 | ireg = (unsigned int *) | |
305 | get_property(dn, "ibm,lrdr-capacity", NULL); | |
306 | ||
307 | if (!ireg) | |
308 | goto out; | |
309 | ||
310 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
311 | ||
312 | /* Double maxcpus for processors which have SMT capability */ | |
313 | if (cpu_has_feature(CPU_FTR_SMT)) | |
314 | maxcpus *= 2; | |
315 | ||
316 | if (maxcpus > NR_CPUS) { | |
317 | printk(KERN_WARNING | |
318 | "Partition configured for %d cpus, " | |
319 | "operating system maximum is %d.\n", | |
320 | maxcpus, NR_CPUS); | |
321 | maxcpus = NR_CPUS; | |
322 | } else | |
323 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
324 | maxcpus); | |
325 | ||
326 | for (cpu = 0; cpu < maxcpus; cpu++) | |
327 | cpu_set(cpu, cpu_possible_map); | |
328 | out: | |
329 | of_node_put(dn); | |
330 | } | |
331 | ||
332 | /* | |
333 | * Do the sibling map; assume only two threads per processor. | |
334 | */ | |
335 | for_each_cpu(cpu) { | |
336 | cpu_set(cpu, cpu_sibling_map[cpu]); | |
337 | if (cpu_has_feature(CPU_FTR_SMT)) | |
338 | cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); | |
339 | } | |
340 | ||
341 | systemcfg->processorCount = num_present_cpus(); | |
342 | } | |
343 | #endif /* defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) */ | |
344 | ||
345 | ||
346 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
347 | ||
348 | extern struct machdep_calls pSeries_md; | |
349 | extern struct machdep_calls pmac_md; | |
350 | extern struct machdep_calls maple_md; | |
351 | ||
352 | /* Ultimately, stuff them in an elf section like initcalls... */ | |
353 | static struct machdep_calls __initdata *machines[] = { | |
354 | #ifdef CONFIG_PPC_PSERIES | |
355 | &pSeries_md, | |
356 | #endif /* CONFIG_PPC_PSERIES */ | |
357 | #ifdef CONFIG_PPC_PMAC | |
358 | &pmac_md, | |
359 | #endif /* CONFIG_PPC_PMAC */ | |
360 | #ifdef CONFIG_PPC_MAPLE | |
361 | &maple_md, | |
362 | #endif /* CONFIG_PPC_MAPLE */ | |
363 | NULL | |
364 | }; | |
365 | ||
366 | /* | |
367 | * Early initialization entry point. This is called by head.S | |
368 | * with MMU translation disabled. We rely on the "feature" of | |
369 | * the CPU that ignores the top 2 bits of the address in real | |
370 | * mode so we can access kernel globals normally provided we | |
371 | * only toy with things in the RMO region. From here, we do | |
372 | * some early parsing of the device-tree to setup out LMB | |
373 | * data structures, and allocate & initialize the hash table | |
374 | * and segment tables so we can start running with translation | |
375 | * enabled. | |
376 | * | |
377 | * It is this function which will call the probe() callback of | |
378 | * the various platform types and copy the matching one to the | |
379 | * global ppc_md structure. Your platform can eventually do | |
380 | * some very early initializations from the probe() routine, but | |
381 | * this is not recommended, be very careful as, for example, the | |
382 | * device-tree is not accessible via normal means at this point. | |
383 | */ | |
384 | ||
385 | void __init early_setup(unsigned long dt_ptr) | |
386 | { | |
387 | struct paca_struct *lpaca = get_paca(); | |
388 | static struct machdep_calls **mach; | |
389 | ||
390 | /* | |
391 | * Enable early debugging if any specified (see top of | |
392 | * this file) | |
393 | */ | |
394 | EARLY_DEBUG_INIT(); | |
395 | ||
396 | DBG(" -> early_setup()\n"); | |
397 | ||
398 | /* | |
399 | * Fill the default DBG level (do we want to keep | |
400 | * that old mecanism around forever ?) | |
401 | */ | |
402 | ppcdbg_initialize(); | |
403 | ||
404 | /* | |
405 | * Do early initializations using the flattened device | |
406 | * tree, like retreiving the physical memory map or | |
407 | * calculating/retreiving the hash table size | |
408 | */ | |
409 | early_init_devtree(__va(dt_ptr)); | |
410 | ||
411 | /* | |
412 | * Iterate all ppc_md structures until we find the proper | |
413 | * one for the current machine type | |
414 | */ | |
415 | DBG("Probing machine type for platform %x...\n", | |
416 | systemcfg->platform); | |
417 | ||
418 | for (mach = machines; *mach; mach++) { | |
419 | if ((*mach)->probe(systemcfg->platform)) | |
420 | break; | |
421 | } | |
422 | /* What can we do if we didn't find ? */ | |
423 | if (*mach == NULL) { | |
424 | DBG("No suitable machine found !\n"); | |
425 | for (;;); | |
426 | } | |
427 | ppc_md = **mach; | |
428 | ||
429 | /* our udbg callbacks got overriden by the above, let's put them | |
430 | * back in. Ultimately, I want those things to be split from the | |
431 | * main ppc_md | |
432 | */ | |
433 | EARLY_DEBUG_INIT(); | |
434 | ||
435 | DBG("Found, Initializing memory management...\n"); | |
436 | ||
437 | /* | |
438 | * Initialize stab / SLB management | |
439 | */ | |
440 | stab_initialize(lpaca->stab_real); | |
441 | ||
442 | /* | |
443 | * Initialize the MMU Hash table and create the linear mapping | |
444 | * of memory | |
445 | */ | |
446 | htab_initialize(); | |
447 | ||
448 | DBG(" <- early_setup()\n"); | |
449 | } | |
450 | ||
451 | ||
452 | /* | |
453 | * Initialize some remaining members of the ppc64_caches and systemcfg structures | |
454 | * (at least until we get rid of them completely). This is mostly some | |
455 | * cache informations about the CPU that will be used by cache flush | |
456 | * routines and/or provided to userland | |
457 | */ | |
458 | static void __init initialize_cache_info(void) | |
459 | { | |
460 | struct device_node *np; | |
461 | unsigned long num_cpus = 0; | |
462 | ||
463 | DBG(" -> initialize_cache_info()\n"); | |
464 | ||
465 | for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { | |
466 | num_cpus += 1; | |
467 | ||
468 | /* We're assuming *all* of the CPUs have the same | |
469 | * d-cache and i-cache sizes... -Peter | |
470 | */ | |
471 | ||
472 | if ( num_cpus == 1 ) { | |
473 | u32 *sizep, *lsizep; | |
474 | u32 size, lsize; | |
475 | const char *dc, *ic; | |
476 | ||
477 | /* Then read cache informations */ | |
478 | if (systemcfg->platform == PLATFORM_POWERMAC) { | |
479 | dc = "d-cache-block-size"; | |
480 | ic = "i-cache-block-size"; | |
481 | } else { | |
482 | dc = "d-cache-line-size"; | |
483 | ic = "i-cache-line-size"; | |
484 | } | |
485 | ||
486 | size = 0; | |
487 | lsize = cur_cpu_spec->dcache_bsize; | |
488 | sizep = (u32 *)get_property(np, "d-cache-size", NULL); | |
489 | if (sizep != NULL) | |
490 | size = *sizep; | |
491 | lsizep = (u32 *) get_property(np, dc, NULL); | |
492 | if (lsizep != NULL) | |
493 | lsize = *lsizep; | |
494 | if (sizep == 0 || lsizep == 0) | |
495 | DBG("Argh, can't find dcache properties ! " | |
496 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
497 | ||
498 | systemcfg->dcache_size = ppc64_caches.dsize = size; | |
499 | systemcfg->dcache_line_size = | |
500 | ppc64_caches.dline_size = lsize; | |
501 | ppc64_caches.log_dline_size = __ilog2(lsize); | |
502 | ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; | |
503 | ||
504 | size = 0; | |
505 | lsize = cur_cpu_spec->icache_bsize; | |
506 | sizep = (u32 *)get_property(np, "i-cache-size", NULL); | |
507 | if (sizep != NULL) | |
508 | size = *sizep; | |
509 | lsizep = (u32 *)get_property(np, ic, NULL); | |
510 | if (lsizep != NULL) | |
511 | lsize = *lsizep; | |
512 | if (sizep == 0 || lsizep == 0) | |
513 | DBG("Argh, can't find icache properties ! " | |
514 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
515 | ||
516 | systemcfg->icache_size = ppc64_caches.isize = size; | |
517 | systemcfg->icache_line_size = | |
518 | ppc64_caches.iline_size = lsize; | |
519 | ppc64_caches.log_iline_size = __ilog2(lsize); | |
520 | ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; | |
521 | } | |
522 | } | |
523 | ||
524 | /* Add an eye catcher and the systemcfg layout version number */ | |
525 | strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); | |
526 | systemcfg->version.major = SYSTEMCFG_MAJOR; | |
527 | systemcfg->version.minor = SYSTEMCFG_MINOR; | |
528 | systemcfg->processor = mfspr(SPRN_PVR); | |
529 | ||
530 | DBG(" <- initialize_cache_info()\n"); | |
531 | } | |
532 | ||
533 | static void __init check_for_initrd(void) | |
534 | { | |
535 | #ifdef CONFIG_BLK_DEV_INITRD | |
536 | u64 *prop; | |
537 | ||
538 | DBG(" -> check_for_initrd()\n"); | |
539 | ||
540 | prop = (u64 *)get_property(of_chosen, "linux,initrd-start", NULL); | |
541 | if (prop != NULL) { | |
542 | initrd_start = (unsigned long)__va(*prop); | |
543 | prop = (u64 *)get_property(of_chosen, "linux,initrd-end", NULL); | |
544 | if (prop != NULL) { | |
545 | initrd_end = (unsigned long)__va(*prop); | |
546 | initrd_below_start_ok = 1; | |
547 | } else | |
548 | initrd_start = 0; | |
549 | } | |
550 | ||
551 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
552 | * look sensible. If not, clear initrd reference. | |
553 | */ | |
554 | if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE && | |
555 | initrd_end > initrd_start) | |
556 | ROOT_DEV = Root_RAM0; | |
557 | else | |
558 | initrd_start = initrd_end = 0; | |
559 | ||
560 | if (initrd_start) | |
561 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
562 | ||
563 | DBG(" <- check_for_initrd()\n"); | |
564 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
565 | } | |
566 | ||
567 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
568 | ||
569 | /* | |
570 | * Do some initial setup of the system. The parameters are those which | |
571 | * were passed in from the bootloader. | |
572 | */ | |
573 | void __init setup_system(void) | |
574 | { | |
575 | DBG(" -> setup_system()\n"); | |
576 | ||
577 | #ifdef CONFIG_PPC_ISERIES | |
578 | /* pSeries systems are identified in prom.c via OF. */ | |
579 | if (itLpNaca.xLparInstalled == 1) | |
580 | systemcfg->platform = PLATFORM_ISERIES_LPAR; | |
581 | ||
582 | ppc_md.init_early(); | |
583 | #else /* CONFIG_PPC_ISERIES */ | |
584 | ||
585 | /* | |
586 | * Unflatten the device-tree passed by prom_init or kexec | |
587 | */ | |
588 | unflatten_device_tree(); | |
589 | ||
590 | /* | |
591 | * Fill the ppc64_caches & systemcfg structures with informations | |
592 | * retreived from the device-tree. Need to be called before | |
593 | * finish_device_tree() since the later requires some of the | |
594 | * informations filled up here to properly parse the interrupt | |
595 | * tree. | |
596 | * It also sets up the cache line sizes which allows to call | |
597 | * routines like flush_icache_range (used by the hash init | |
598 | * later on). | |
599 | */ | |
600 | initialize_cache_info(); | |
601 | ||
602 | #ifdef CONFIG_PPC_RTAS | |
603 | /* | |
604 | * Initialize RTAS if available | |
605 | */ | |
606 | rtas_initialize(); | |
607 | #endif /* CONFIG_PPC_RTAS */ | |
608 | ||
609 | /* | |
610 | * Check if we have an initrd provided via the device-tree | |
611 | */ | |
612 | check_for_initrd(); | |
613 | ||
614 | /* | |
615 | * Do some platform specific early initializations, that includes | |
616 | * setting up the hash table pointers. It also sets up some interrupt-mapping | |
617 | * related options that will be used by finish_device_tree() | |
618 | */ | |
619 | ppc_md.init_early(); | |
620 | ||
621 | /* | |
622 | * "Finish" the device-tree, that is do the actual parsing of | |
623 | * some of the properties like the interrupt map | |
624 | */ | |
625 | finish_device_tree(); | |
626 | ||
627 | /* | |
628 | * Initialize xmon | |
629 | */ | |
630 | #ifdef CONFIG_XMON_DEFAULT | |
631 | xmon_init(); | |
632 | #endif | |
633 | /* | |
634 | * Register early console | |
635 | */ | |
636 | early_console_initialized = 1; | |
637 | register_console(&udbg_console); | |
638 | ||
639 | /* Save unparsed command line copy for /proc/cmdline */ | |
640 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
641 | ||
642 | parse_early_param(); | |
643 | #endif /* !CONFIG_PPC_ISERIES */ | |
644 | ||
645 | #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) | |
646 | /* | |
647 | * iSeries has already initialized the cpu maps at this point. | |
648 | */ | |
649 | setup_cpu_maps(); | |
650 | ||
651 | /* Release secondary cpus out of their spinloops at 0x60 now that | |
652 | * we can map physical -> logical CPU ids | |
653 | */ | |
654 | smp_release_cpus(); | |
655 | #endif /* defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) */ | |
656 | ||
657 | printk("Starting Linux PPC64 %s\n", UTS_RELEASE); | |
658 | ||
659 | printk("-----------------------------------------------------\n"); | |
660 | printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); | |
661 | printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); | |
662 | printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); | |
663 | printk("systemcfg = 0x%p\n", systemcfg); | |
664 | printk("systemcfg->platform = 0x%x\n", systemcfg->platform); | |
665 | printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); | |
666 | printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); | |
667 | printk("ppc64_caches.dcache_line_size = 0x%x\n", | |
668 | ppc64_caches.dline_size); | |
669 | printk("ppc64_caches.icache_line_size = 0x%x\n", | |
670 | ppc64_caches.iline_size); | |
671 | printk("htab_address = 0x%p\n", htab_address); | |
672 | printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); | |
673 | printk("-----------------------------------------------------\n"); | |
674 | ||
675 | mm_init_ppc64(); | |
676 | ||
677 | DBG(" <- setup_system()\n"); | |
678 | } | |
679 | ||
680 | ||
681 | void machine_restart(char *cmd) | |
682 | { | |
683 | if (ppc_md.nvram_sync) | |
684 | ppc_md.nvram_sync(); | |
685 | ppc_md.restart(cmd); | |
686 | } | |
687 | ||
688 | EXPORT_SYMBOL(machine_restart); | |
689 | ||
690 | void machine_power_off(void) | |
691 | { | |
692 | if (ppc_md.nvram_sync) | |
693 | ppc_md.nvram_sync(); | |
694 | ppc_md.power_off(); | |
695 | } | |
696 | ||
697 | EXPORT_SYMBOL(machine_power_off); | |
698 | ||
699 | void machine_halt(void) | |
700 | { | |
701 | if (ppc_md.nvram_sync) | |
702 | ppc_md.nvram_sync(); | |
703 | ppc_md.halt(); | |
704 | } | |
705 | ||
706 | EXPORT_SYMBOL(machine_halt); | |
707 | ||
708 | unsigned long ppc_proc_freq; | |
709 | unsigned long ppc_tb_freq; | |
710 | ||
711 | static int ppc64_panic_event(struct notifier_block *this, | |
712 | unsigned long event, void *ptr) | |
713 | { | |
714 | ppc_md.panic((char *)ptr); /* May not return */ | |
715 | return NOTIFY_DONE; | |
716 | } | |
717 | ||
718 | ||
719 | #ifdef CONFIG_SMP | |
720 | DEFINE_PER_CPU(unsigned int, pvr); | |
721 | #endif | |
722 | ||
723 | static int show_cpuinfo(struct seq_file *m, void *v) | |
724 | { | |
725 | unsigned long cpu_id = (unsigned long)v - 1; | |
726 | unsigned int pvr; | |
727 | unsigned short maj; | |
728 | unsigned short min; | |
729 | ||
730 | if (cpu_id == NR_CPUS) { | |
731 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
732 | ||
733 | if (ppc_md.get_cpuinfo != NULL) | |
734 | ppc_md.get_cpuinfo(m); | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | /* We only show online cpus: disable preempt (overzealous, I | |
740 | * knew) to prevent cpu going down. */ | |
741 | preempt_disable(); | |
742 | if (!cpu_online(cpu_id)) { | |
743 | preempt_enable(); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | #ifdef CONFIG_SMP | |
748 | pvr = per_cpu(pvr, cpu_id); | |
749 | #else | |
750 | pvr = mfspr(SPRN_PVR); | |
751 | #endif | |
752 | maj = (pvr >> 8) & 0xFF; | |
753 | min = pvr & 0xFF; | |
754 | ||
755 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
756 | seq_printf(m, "cpu\t\t: "); | |
757 | ||
758 | if (cur_cpu_spec->pvr_mask) | |
759 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
760 | else | |
761 | seq_printf(m, "unknown (%08x)", pvr); | |
762 | ||
763 | #ifdef CONFIG_ALTIVEC | |
764 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
765 | seq_printf(m, ", altivec supported"); | |
766 | #endif /* CONFIG_ALTIVEC */ | |
767 | ||
768 | seq_printf(m, "\n"); | |
769 | ||
770 | /* | |
771 | * Assume here that all clock rates are the same in a | |
772 | * smp system. -- Cort | |
773 | */ | |
774 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000, | |
775 | ppc_proc_freq % 1000000); | |
776 | ||
777 | seq_printf(m, "revision\t: %hd.%hd\n\n", maj, min); | |
778 | ||
779 | preempt_enable(); | |
780 | return 0; | |
781 | } | |
782 | ||
783 | static void *c_start(struct seq_file *m, loff_t *pos) | |
784 | { | |
785 | return *pos <= NR_CPUS ? (void *)((*pos)+1) : NULL; | |
786 | } | |
787 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
788 | { | |
789 | ++*pos; | |
790 | return c_start(m, pos); | |
791 | } | |
792 | static void c_stop(struct seq_file *m, void *v) | |
793 | { | |
794 | } | |
795 | struct seq_operations cpuinfo_op = { | |
796 | .start =c_start, | |
797 | .next = c_next, | |
798 | .stop = c_stop, | |
799 | .show = show_cpuinfo, | |
800 | }; | |
801 | ||
802 | /* | |
803 | * These three variables are used to save values passed to us by prom_init() | |
804 | * via the device tree. The TCE variables are needed because with a memory_limit | |
805 | * in force we may need to explicitly map the TCE are at the top of RAM. | |
806 | */ | |
807 | unsigned long memory_limit; | |
808 | unsigned long tce_alloc_start; | |
809 | unsigned long tce_alloc_end; | |
810 | ||
811 | #ifdef CONFIG_PPC_ISERIES | |
812 | /* | |
813 | * On iSeries we just parse the mem=X option from the command line. | |
814 | * On pSeries it's a bit more complicated, see prom_init_mem() | |
815 | */ | |
816 | static int __init early_parsemem(char *p) | |
817 | { | |
818 | if (!p) | |
819 | return 0; | |
820 | ||
821 | memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE); | |
822 | ||
823 | return 0; | |
824 | } | |
825 | early_param("mem", early_parsemem); | |
826 | #endif /* CONFIG_PPC_ISERIES */ | |
827 | ||
828 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
829 | static int __init set_preferred_console(void) | |
830 | { | |
831 | struct device_node *prom_stdout = NULL; | |
832 | char *name; | |
833 | u32 *spd; | |
834 | int offset = 0; | |
835 | ||
836 | DBG(" -> set_preferred_console()\n"); | |
837 | ||
838 | /* The user has requested a console so this is already set up. */ | |
839 | if (strstr(saved_command_line, "console=")) { | |
840 | DBG(" console was specified !\n"); | |
841 | return -EBUSY; | |
842 | } | |
843 | ||
844 | if (!of_chosen) { | |
845 | DBG(" of_chosen is NULL !\n"); | |
846 | return -ENODEV; | |
847 | } | |
848 | /* We are getting a weird phandle from OF ... */ | |
849 | /* ... So use the full path instead */ | |
850 | name = (char *)get_property(of_chosen, "linux,stdout-path", NULL); | |
851 | if (name == NULL) { | |
852 | DBG(" no linux,stdout-path !\n"); | |
853 | return -ENODEV; | |
854 | } | |
855 | prom_stdout = of_find_node_by_path(name); | |
856 | if (!prom_stdout) { | |
857 | DBG(" can't find stdout package %s !\n", name); | |
858 | return -ENODEV; | |
859 | } | |
860 | DBG("stdout is %s\n", prom_stdout->full_name); | |
861 | ||
862 | name = (char *)get_property(prom_stdout, "name", NULL); | |
863 | if (!name) { | |
864 | DBG(" stdout package has no name !\n"); | |
865 | goto not_found; | |
866 | } | |
867 | spd = (u32 *)get_property(prom_stdout, "current-speed", NULL); | |
868 | ||
869 | if (0) | |
870 | ; | |
871 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
872 | else if (strcmp(name, "serial") == 0) { | |
873 | int i; | |
874 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i); | |
875 | if (i > 8) { | |
876 | switch (reg[1]) { | |
877 | case 0x3f8: | |
878 | offset = 0; | |
879 | break; | |
880 | case 0x2f8: | |
881 | offset = 1; | |
882 | break; | |
883 | case 0x898: | |
884 | offset = 2; | |
885 | break; | |
886 | case 0x890: | |
887 | offset = 3; | |
888 | break; | |
889 | default: | |
890 | /* We dont recognise the serial port */ | |
891 | goto not_found; | |
892 | } | |
893 | } | |
894 | } | |
895 | #endif /* CONFIG_SERIAL_8250_CONSOLE */ | |
896 | #ifdef CONFIG_PPC_PSERIES | |
897 | else if (strcmp(name, "vty") == 0) { | |
898 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL); | |
899 | char *compat = (char *)get_property(prom_stdout, "compatible", NULL); | |
900 | ||
901 | if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) { | |
902 | /* Host Virtual Serial Interface */ | |
903 | int offset; | |
904 | switch (reg[0]) { | |
905 | case 0x30000000: | |
906 | offset = 0; | |
907 | break; | |
908 | case 0x30000001: | |
909 | offset = 1; | |
910 | break; | |
911 | default: | |
912 | goto not_found; | |
913 | } | |
914 | of_node_put(prom_stdout); | |
915 | DBG("Found hvsi console at offset %d\n", offset); | |
916 | return add_preferred_console("hvsi", offset, NULL); | |
917 | } else { | |
918 | /* pSeries LPAR virtual console */ | |
919 | of_node_put(prom_stdout); | |
920 | DBG("Found hvc console\n"); | |
921 | return add_preferred_console("hvc", 0, NULL); | |
922 | } | |
923 | } | |
924 | #endif /* CONFIG_PPC_PSERIES */ | |
925 | #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE | |
926 | else if (strcmp(name, "ch-a") == 0) | |
927 | offset = 0; | |
928 | else if (strcmp(name, "ch-b") == 0) | |
929 | offset = 1; | |
930 | #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ | |
931 | else | |
932 | goto not_found; | |
933 | of_node_put(prom_stdout); | |
934 | ||
935 | DBG("Found serial console at ttyS%d\n", offset); | |
936 | ||
937 | if (spd) { | |
938 | static char __initdata opt[16]; | |
939 | sprintf(opt, "%d", *spd); | |
940 | return add_preferred_console("ttyS", offset, opt); | |
941 | } else | |
942 | return add_preferred_console("ttyS", offset, NULL); | |
943 | ||
944 | not_found: | |
945 | DBG("No preferred console found !\n"); | |
946 | of_node_put(prom_stdout); | |
947 | return -ENODEV; | |
948 | } | |
949 | console_initcall(set_preferred_console); | |
950 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
951 | ||
952 | #ifdef CONFIG_IRQSTACKS | |
953 | static void __init irqstack_early_init(void) | |
954 | { | |
955 | unsigned int i; | |
956 | ||
957 | /* | |
958 | * interrupt stacks must be under 256MB, we cannot afford to take | |
959 | * SLB misses on them. | |
960 | */ | |
961 | for_each_cpu(i) { | |
962 | softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, | |
963 | THREAD_SIZE, 0x10000000)); | |
964 | hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, | |
965 | THREAD_SIZE, 0x10000000)); | |
966 | } | |
967 | } | |
968 | #else | |
969 | #define irqstack_early_init() | |
970 | #endif | |
971 | ||
972 | /* | |
973 | * Stack space used when we detect a bad kernel stack pointer, and | |
974 | * early in SMP boots before relocation is enabled. | |
975 | */ | |
976 | static void __init emergency_stack_init(void) | |
977 | { | |
978 | unsigned long limit; | |
979 | unsigned int i; | |
980 | ||
981 | /* | |
982 | * Emergency stacks must be under 256MB, we cannot afford to take | |
983 | * SLB misses on them. The ABI also requires them to be 128-byte | |
984 | * aligned. | |
985 | * | |
986 | * Since we use these as temporary stacks during secondary CPU | |
987 | * bringup, we need to get at them in real mode. This means they | |
988 | * must also be within the RMO region. | |
989 | */ | |
990 | limit = min(0x10000000UL, lmb.rmo_size); | |
991 | ||
992 | for_each_cpu(i) | |
993 | paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128, | |
994 | limit)) + PAGE_SIZE; | |
995 | } | |
996 | ||
997 | /* | |
998 | * Called from setup_arch to initialize the bitmap of available | |
999 | * syscalls in the systemcfg page | |
1000 | */ | |
1001 | void __init setup_syscall_map(void) | |
1002 | { | |
1003 | unsigned int i, count64 = 0, count32 = 0; | |
1004 | extern unsigned long *sys_call_table; | |
1005 | extern unsigned long *sys_call_table32; | |
1006 | extern unsigned long sys_ni_syscall; | |
1007 | ||
1008 | ||
1009 | for (i = 0; i < __NR_syscalls; i++) { | |
1010 | if (sys_call_table[i] == sys_ni_syscall) | |
1011 | continue; | |
1012 | count64++; | |
1013 | systemcfg->syscall_map_64[i >> 5] |= 0x80000000UL >> (i & 0x1f); | |
1014 | } | |
1015 | for (i = 0; i < __NR_syscalls; i++) { | |
1016 | if (sys_call_table32[i] == sys_ni_syscall) | |
1017 | continue; | |
1018 | count32++; | |
1019 | systemcfg->syscall_map_32[i >> 5] |= 0x80000000UL >> (i & 0x1f); | |
1020 | } | |
1021 | printk(KERN_INFO "Syscall map setup, %d 32 bits and %d 64 bits syscalls\n", | |
1022 | count32, count64); | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * Called into from start_kernel, after lock_kernel has been called. | |
1027 | * Initializes bootmem, which is unsed to manage page allocation until | |
1028 | * mem_init is called. | |
1029 | */ | |
1030 | void __init setup_arch(char **cmdline_p) | |
1031 | { | |
1032 | extern void do_init_bootmem(void); | |
1033 | ||
1034 | ppc64_boot_msg(0x12, "Setup Arch"); | |
1035 | ||
1036 | *cmdline_p = cmd_line; | |
1037 | ||
1038 | /* | |
1039 | * Set cache line size based on type of cpu as a default. | |
1040 | * Systems with OF can look in the properties on the cpu node(s) | |
1041 | * for a possibly more accurate value. | |
1042 | */ | |
1043 | dcache_bsize = ppc64_caches.dline_size; | |
1044 | icache_bsize = ppc64_caches.iline_size; | |
1045 | ||
1046 | /* reboot on panic */ | |
1047 | panic_timeout = 180; | |
1048 | ||
1049 | if (ppc_md.panic) | |
1050 | notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); | |
1051 | ||
1052 | init_mm.start_code = PAGE_OFFSET; | |
1053 | init_mm.end_code = (unsigned long) _etext; | |
1054 | init_mm.end_data = (unsigned long) _edata; | |
1055 | init_mm.brk = klimit; | |
1056 | ||
1057 | irqstack_early_init(); | |
1058 | emergency_stack_init(); | |
1059 | ||
1060 | /* set up the bootmem stuff with available memory */ | |
1061 | do_init_bootmem(); | |
1062 | ||
1063 | /* initialize the syscall map in systemcfg */ | |
1064 | setup_syscall_map(); | |
1065 | ||
1066 | ppc_md.setup_arch(); | |
1067 | ||
1068 | /* Select the correct idle loop for the platform. */ | |
1069 | idle_setup(); | |
1070 | ||
1071 | paging_init(); | |
1072 | ppc64_boot_msg(0x15, "Setup Done"); | |
1073 | } | |
1074 | ||
1075 | ||
1076 | /* ToDo: do something useful if ppc_md is not yet setup. */ | |
1077 | #define PPC64_LINUX_FUNCTION 0x0f000000 | |
1078 | #define PPC64_IPL_MESSAGE 0xc0000000 | |
1079 | #define PPC64_TERM_MESSAGE 0xb0000000 | |
1080 | #define PPC64_ATTN_MESSAGE 0xa0000000 | |
1081 | #define PPC64_DUMP_MESSAGE 0xd0000000 | |
1082 | ||
1083 | static void ppc64_do_msg(unsigned int src, const char *msg) | |
1084 | { | |
1085 | if (ppc_md.progress) { | |
1086 | char buf[32]; | |
1087 | ||
1088 | sprintf(buf, "%08x \n", src); | |
1089 | ppc_md.progress(buf, 0); | |
1090 | sprintf(buf, "%-16s", msg); | |
1091 | ppc_md.progress(buf, 0); | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | /* Print a boot progress message. */ | |
1096 | void ppc64_boot_msg(unsigned int src, const char *msg) | |
1097 | { | |
1098 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); | |
1099 | printk("[boot]%04x %s\n", src, msg); | |
1100 | } | |
1101 | ||
1102 | /* Print a termination message (print only -- does not stop the kernel) */ | |
1103 | void ppc64_terminate_msg(unsigned int src, const char *msg) | |
1104 | { | |
1105 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); | |
1106 | printk("[terminate]%04x %s\n", src, msg); | |
1107 | } | |
1108 | ||
1109 | /* Print something that needs attention (device error, etc) */ | |
1110 | void ppc64_attention_msg(unsigned int src, const char *msg) | |
1111 | { | |
1112 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_ATTN_MESSAGE|src, msg); | |
1113 | printk("[attention]%04x %s\n", src, msg); | |
1114 | } | |
1115 | ||
1116 | /* Print a dump progress message. */ | |
1117 | void ppc64_dump_msg(unsigned int src, const char *msg) | |
1118 | { | |
1119 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_DUMP_MESSAGE|src, msg); | |
1120 | printk("[dump]%04x %s\n", src, msg); | |
1121 | } | |
1122 | ||
1123 | int set_spread_lpevents( char * str ) | |
1124 | { | |
1125 | /* The parameter is the number of processors to share in processing lp events */ | |
1126 | unsigned long i; | |
1127 | unsigned long val = simple_strtoul( str, NULL, 0 ); | |
1128 | if ( ( val > 0 ) && ( val <= NR_CPUS ) ) { | |
1129 | for ( i=1; i<val; ++i ) | |
1130 | paca[i].lpqueue_ptr = paca[0].lpqueue_ptr; | |
1131 | printk("lpevent processing spread over %ld processors\n", val); | |
1132 | } | |
1133 | else | |
1134 | printk("invalid spreaqd_lpevents %ld\n", val); | |
1135 | return 1; | |
1136 | } | |
1137 | ||
1138 | /* This should only be called on processor 0 during calibrate decr */ | |
1139 | void setup_default_decr(void) | |
1140 | { | |
1141 | struct paca_struct *lpaca = get_paca(); | |
1142 | ||
1143 | if ( decr_overclock_set && !decr_overclock_proc0_set ) | |
1144 | decr_overclock_proc0 = decr_overclock; | |
1145 | ||
1146 | lpaca->default_decr = tb_ticks_per_jiffy / decr_overclock_proc0; | |
1147 | lpaca->next_jiffy_update_tb = get_tb() + tb_ticks_per_jiffy; | |
1148 | } | |
1149 | ||
1150 | int set_decr_overclock_proc0( char * str ) | |
1151 | { | |
1152 | unsigned long val = simple_strtoul( str, NULL, 0 ); | |
1153 | if ( ( val >= 1 ) && ( val <= 48 ) ) { | |
1154 | decr_overclock_proc0_set = 1; | |
1155 | decr_overclock_proc0 = val; | |
1156 | printk("proc 0 decrementer overclock factor of %ld\n", val); | |
1157 | } | |
1158 | else | |
1159 | printk("invalid proc 0 decrementer overclock factor of %ld\n", val); | |
1160 | return 1; | |
1161 | } | |
1162 | ||
1163 | int set_decr_overclock( char * str ) | |
1164 | { | |
1165 | unsigned long val = simple_strtoul( str, NULL, 0 ); | |
1166 | if ( ( val >= 1 ) && ( val <= 48 ) ) { | |
1167 | decr_overclock_set = 1; | |
1168 | decr_overclock = val; | |
1169 | printk("decrementer overclock factor of %ld\n", val); | |
1170 | } | |
1171 | else | |
1172 | printk("invalid decrementer overclock factor of %ld\n", val); | |
1173 | return 1; | |
1174 | ||
1175 | } | |
1176 | ||
1177 | __setup("spread_lpevents=", set_spread_lpevents ); | |
1178 | __setup("decr_overclock_proc0=", set_decr_overclock_proc0 ); | |
1179 | __setup("decr_overclock=", set_decr_overclock ); | |
1180 | ||
1181 | #ifndef CONFIG_PPC_ISERIES | |
1182 | /* | |
1183 | * This function can be used by platforms to "find" legacy serial ports. | |
1184 | * It works for "serial" nodes under an "isa" node, and will try to | |
1185 | * respect the "ibm,aix-loc" property if any. It works with up to 8 | |
1186 | * ports. | |
1187 | */ | |
1188 | ||
1189 | #define MAX_LEGACY_SERIAL_PORTS 8 | |
1190 | static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; | |
1191 | static unsigned int old_serial_count; | |
1192 | ||
1193 | void __init generic_find_legacy_serial_ports(u64 *physport, | |
1194 | unsigned int *default_speed) | |
1195 | { | |
1196 | struct device_node *np; | |
1197 | u32 *sizeprop; | |
1198 | ||
1199 | struct isa_reg_property { | |
1200 | u32 space; | |
1201 | u32 address; | |
1202 | u32 size; | |
1203 | }; | |
1204 | struct pci_reg_property { | |
1205 | struct pci_address addr; | |
1206 | u32 size_hi; | |
1207 | u32 size_lo; | |
1208 | }; | |
1209 | ||
1210 | DBG(" -> generic_find_legacy_serial_port()\n"); | |
1211 | ||
1212 | *physport = 0; | |
1213 | if (default_speed) | |
1214 | *default_speed = 0; | |
1215 | ||
1216 | np = of_find_node_by_path("/"); | |
1217 | if (!np) | |
1218 | return; | |
1219 | ||
1220 | /* First fill our array */ | |
1221 | for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { | |
1222 | struct device_node *isa, *pci; | |
1223 | struct isa_reg_property *reg; | |
1224 | unsigned long phys_size, addr_size, io_base; | |
1225 | u32 *rangesp; | |
1226 | u32 *interrupts, *clk, *spd; | |
1227 | char *typep; | |
1228 | int index, rlen, rentsize; | |
1229 | ||
1230 | /* Ok, first check if it's under an "isa" parent */ | |
1231 | isa = of_get_parent(np); | |
1232 | if (!isa || strcmp(isa->name, "isa")) { | |
1233 | DBG("%s: no isa parent found\n", np->full_name); | |
1234 | continue; | |
1235 | } | |
1236 | ||
1237 | /* Now look for an "ibm,aix-loc" property that gives us ordering | |
1238 | * if any... | |
1239 | */ | |
1240 | typep = (char *)get_property(np, "ibm,aix-loc", NULL); | |
1241 | ||
1242 | /* Get the ISA port number */ | |
1243 | reg = (struct isa_reg_property *)get_property(np, "reg", NULL); | |
1244 | if (reg == NULL) | |
1245 | goto next_port; | |
1246 | /* We assume the interrupt number isn't translated ... */ | |
1247 | interrupts = (u32 *)get_property(np, "interrupts", NULL); | |
1248 | /* get clock freq. if present */ | |
1249 | clk = (u32 *)get_property(np, "clock-frequency", NULL); | |
1250 | /* get default speed if present */ | |
1251 | spd = (u32 *)get_property(np, "current-speed", NULL); | |
1252 | /* Default to locate at end of array */ | |
1253 | index = old_serial_count; /* end of the array by default */ | |
1254 | ||
1255 | /* If we have a location index, then use it */ | |
1256 | if (typep && *typep == 'S') { | |
1257 | index = simple_strtol(typep+1, NULL, 0) - 1; | |
1258 | /* if index is out of range, use end of array instead */ | |
1259 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
1260 | index = old_serial_count; | |
1261 | /* if our index is still out of range, that mean that | |
1262 | * array is full, we could scan for a free slot but that | |
1263 | * make little sense to bother, just skip the port | |
1264 | */ | |
1265 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
1266 | goto next_port; | |
1267 | if (index >= old_serial_count) | |
1268 | old_serial_count = index + 1; | |
1269 | /* Check if there is a port who already claimed our slot */ | |
1270 | if (serial_ports[index].iobase != 0) { | |
1271 | /* if we still have some room, move it, else override */ | |
1272 | if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { | |
1273 | DBG("Moved legacy port %d -> %d\n", index, | |
1274 | old_serial_count); | |
1275 | serial_ports[old_serial_count++] = | |
1276 | serial_ports[index]; | |
1277 | } else { | |
1278 | DBG("Replacing legacy port %d\n", index); | |
1279 | } | |
1280 | } | |
1281 | } | |
1282 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
1283 | goto next_port; | |
1284 | if (index >= old_serial_count) | |
1285 | old_serial_count = index + 1; | |
1286 | ||
1287 | /* Now fill the entry */ | |
1288 | memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); | |
1289 | serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; | |
1290 | serial_ports[index].iobase = reg->address; | |
1291 | serial_ports[index].irq = interrupts ? interrupts[0] : 0; | |
1292 | serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; | |
1293 | ||
1294 | DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", | |
1295 | index, | |
1296 | serial_ports[index].iobase, | |
1297 | serial_ports[index].irq, | |
1298 | serial_ports[index].uartclk); | |
1299 | ||
1300 | /* Get phys address of IO reg for port 1 */ | |
1301 | if (index != 0) | |
1302 | goto next_port; | |
1303 | ||
1304 | pci = of_get_parent(isa); | |
1305 | if (!pci) { | |
1306 | DBG("%s: no pci parent found\n", np->full_name); | |
1307 | goto next_port; | |
1308 | } | |
1309 | ||
1310 | rangesp = (u32 *)get_property(pci, "ranges", &rlen); | |
1311 | if (rangesp == NULL) { | |
1312 | of_node_put(pci); | |
1313 | goto next_port; | |
1314 | } | |
1315 | rlen /= 4; | |
1316 | ||
1317 | /* we need the #size-cells of the PCI bridge node itself */ | |
1318 | phys_size = 1; | |
1319 | sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); | |
1320 | if (sizeprop != NULL) | |
1321 | phys_size = *sizeprop; | |
1322 | /* we need the parent #addr-cells */ | |
1323 | addr_size = prom_n_addr_cells(pci); | |
1324 | rentsize = 3 + addr_size + phys_size; | |
1325 | io_base = 0; | |
1326 | for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { | |
1327 | if (((rangesp[0] >> 24) & 0x3) != 1) | |
1328 | continue; /* not IO space */ | |
1329 | io_base = rangesp[3]; | |
1330 | if (addr_size == 2) | |
1331 | io_base = (io_base << 32) | rangesp[4]; | |
1332 | } | |
1333 | if (io_base != 0) { | |
1334 | *physport = io_base + reg->address; | |
1335 | if (default_speed && spd) | |
1336 | *default_speed = *spd; | |
1337 | } | |
1338 | of_node_put(pci); | |
1339 | next_port: | |
1340 | of_node_put(isa); | |
1341 | } | |
1342 | ||
1343 | DBG(" <- generic_find_legacy_serial_port()\n"); | |
1344 | } | |
1345 | ||
1346 | static struct platform_device serial_device = { | |
1347 | .name = "serial8250", | |
1348 | .id = 0, | |
1349 | .dev = { | |
1350 | .platform_data = serial_ports, | |
1351 | }, | |
1352 | }; | |
1353 | ||
1354 | static int __init serial_dev_init(void) | |
1355 | { | |
1356 | return platform_device_register(&serial_device); | |
1357 | } | |
1358 | arch_initcall(serial_dev_init); | |
1359 | ||
1360 | #endif /* CONFIG_PPC_ISERIES */ | |
1361 | ||
1362 | int check_legacy_ioport(unsigned long base_port) | |
1363 | { | |
1364 | if (ppc_md.check_legacy_ioport == NULL) | |
1365 | return 0; | |
1366 | return ppc_md.check_legacy_ioport(base_port); | |
1367 | } | |
1368 | EXPORT_SYMBOL(check_legacy_ioport); | |
1369 | ||
1370 | #ifdef CONFIG_XMON | |
1371 | static int __init early_xmon(char *p) | |
1372 | { | |
1373 | /* ensure xmon is enabled */ | |
1374 | if (p) { | |
1375 | if (strncmp(p, "on", 2) == 0) | |
1376 | xmon_init(); | |
1377 | if (strncmp(p, "early", 5) != 0) | |
1378 | return 0; | |
1379 | } | |
1380 | xmon_init(); | |
1381 | debugger(NULL); | |
1382 | ||
1383 | return 0; | |
1384 | } | |
1385 | early_param("xmon", early_xmon); | |
1386 | #endif | |
1387 | ||
1388 | void cpu_die(void) | |
1389 | { | |
1390 | if (ppc_md.cpu_die) | |
1391 | ppc_md.cpu_die(); | |
1392 | } |