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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> | |
40ef8cbc PM |
40 | #include <asm/smp.h> |
41 | #include <asm/elf.h> | |
42 | #include <asm/machdep.h> | |
43 | #include <asm/paca.h> | |
44 | #include <asm/ppcdebug.h> | |
45 | #include <asm/time.h> | |
46 | #include <asm/cputable.h> | |
47 | #include <asm/sections.h> | |
48 | #include <asm/btext.h> | |
49 | #include <asm/nvram.h> | |
50 | #include <asm/setup.h> | |
51 | #include <asm/system.h> | |
52 | #include <asm/rtas.h> | |
53 | #include <asm/iommu.h> | |
54 | #include <asm/serial.h> | |
55 | #include <asm/cache.h> | |
56 | #include <asm/page.h> | |
57 | #include <asm/mmu.h> | |
58 | #include <asm/lmb.h> | |
59 | #include <asm/iSeries/ItLpNaca.h> | |
60 | #include <asm/firmware.h> | |
61 | #include <asm/systemcfg.h> | |
62 | ||
63 | #ifdef DEBUG | |
64 | #define DBG(fmt...) udbg_printf(fmt) | |
65 | #else | |
66 | #define DBG(fmt...) | |
67 | #endif | |
68 | ||
69 | /* | |
70 | * Here are some early debugging facilities. You can enable one | |
71 | * but your kernel will not boot on anything else if you do so | |
72 | */ | |
73 | ||
74 | /* This one is for use on LPAR machines that support an HVC console | |
75 | * on vterm 0 | |
76 | */ | |
77 | extern void udbg_init_debug_lpar(void); | |
78 | /* This one is for use on Apple G5 machines | |
79 | */ | |
80 | extern void udbg_init_pmac_realmode(void); | |
81 | /* That's RTAS panel debug */ | |
82 | extern void call_rtas_display_status_delay(unsigned char c); | |
83 | /* Here's maple real mode debug */ | |
84 | extern void udbg_init_maple_realmode(void); | |
85 | ||
86 | #define EARLY_DEBUG_INIT() do {} while(0) | |
87 | ||
88 | #if 0 | |
89 | #define EARLY_DEBUG_INIT() udbg_init_debug_lpar() | |
90 | #define EARLY_DEBUG_INIT() udbg_init_maple_realmode() | |
91 | #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() | |
92 | #define EARLY_DEBUG_INIT() \ | |
93 | do { udbg_putc = call_rtas_display_status_delay; } while(0) | |
94 | #endif | |
95 | ||
96 | /* extern void *stab; */ | |
97 | extern unsigned long klimit; | |
98 | ||
99 | extern void mm_init_ppc64(void); | |
100 | extern void stab_initialize(unsigned long stab); | |
101 | extern void htab_initialize(void); | |
102 | extern void early_init_devtree(void *flat_dt); | |
103 | extern void unflatten_device_tree(void); | |
104 | ||
105 | extern void smp_release_cpus(void); | |
106 | ||
107 | int have_of = 1; | |
108 | int boot_cpuid = 0; | |
109 | int boot_cpuid_phys = 0; | |
110 | dev_t boot_dev; | |
111 | u64 ppc64_pft_size; | |
112 | ||
113 | struct ppc64_caches ppc64_caches; | |
114 | EXPORT_SYMBOL_GPL(ppc64_caches); | |
115 | ||
116 | /* | |
117 | * These are used in binfmt_elf.c to put aux entries on the stack | |
118 | * for each elf executable being started. | |
119 | */ | |
120 | int dcache_bsize; | |
121 | int icache_bsize; | |
122 | int ucache_bsize; | |
123 | ||
124 | /* The main machine-dep calls structure | |
125 | */ | |
126 | struct machdep_calls ppc_md; | |
127 | EXPORT_SYMBOL(ppc_md); | |
128 | ||
129 | #ifdef CONFIG_MAGIC_SYSRQ | |
130 | unsigned long SYSRQ_KEY; | |
131 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
132 | ||
133 | ||
134 | static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); | |
135 | static struct notifier_block ppc64_panic_block = { | |
136 | .notifier_call = ppc64_panic_event, | |
137 | .priority = INT_MIN /* may not return; must be done last */ | |
138 | }; | |
139 | ||
40ef8cbc PM |
140 | #ifdef CONFIG_SMP |
141 | ||
142 | static int smt_enabled_cmdline; | |
143 | ||
144 | /* Look for ibm,smt-enabled OF option */ | |
145 | static void check_smt_enabled(void) | |
146 | { | |
147 | struct device_node *dn; | |
148 | char *smt_option; | |
149 | ||
150 | /* Allow the command line to overrule the OF option */ | |
151 | if (smt_enabled_cmdline) | |
152 | return; | |
153 | ||
154 | dn = of_find_node_by_path("/options"); | |
155 | ||
156 | if (dn) { | |
157 | smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); | |
158 | ||
159 | if (smt_option) { | |
160 | if (!strcmp(smt_option, "on")) | |
161 | smt_enabled_at_boot = 1; | |
162 | else if (!strcmp(smt_option, "off")) | |
163 | smt_enabled_at_boot = 0; | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | /* Look for smt-enabled= cmdline option */ | |
169 | static int __init early_smt_enabled(char *p) | |
170 | { | |
171 | smt_enabled_cmdline = 1; | |
172 | ||
173 | if (!p) | |
174 | return 0; | |
175 | ||
176 | if (!strcmp(p, "on") || !strcmp(p, "1")) | |
177 | smt_enabled_at_boot = 1; | |
178 | else if (!strcmp(p, "off") || !strcmp(p, "0")) | |
179 | smt_enabled_at_boot = 0; | |
180 | ||
181 | return 0; | |
182 | } | |
183 | early_param("smt-enabled", early_smt_enabled); | |
184 | ||
185 | /** | |
186 | * setup_cpu_maps - initialize the following cpu maps: | |
187 | * cpu_possible_map | |
188 | * cpu_present_map | |
189 | * cpu_sibling_map | |
190 | * | |
191 | * Having the possible map set up early allows us to restrict allocations | |
192 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
193 | * | |
194 | * We do not initialize the online map here; cpus set their own bits in | |
195 | * cpu_online_map as they come up. | |
196 | * | |
197 | * This function is valid only for Open Firmware systems. finish_device_tree | |
198 | * must be called before using this. | |
199 | * | |
200 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
201 | */ | |
202 | static void __init setup_cpu_maps(void) | |
203 | { | |
204 | struct device_node *dn = NULL; | |
205 | int cpu = 0; | |
206 | int swap_cpuid = 0; | |
207 | ||
208 | check_smt_enabled(); | |
209 | ||
210 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
211 | u32 *intserv; | |
212 | int j, len = sizeof(u32), nthreads; | |
213 | ||
214 | intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s", | |
215 | &len); | |
216 | if (!intserv) | |
217 | intserv = (u32 *)get_property(dn, "reg", NULL); | |
218 | ||
219 | nthreads = len / sizeof(u32); | |
220 | ||
221 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
222 | cpu_set(cpu, cpu_present_map); | |
223 | set_hard_smp_processor_id(cpu, intserv[j]); | |
224 | ||
225 | if (intserv[j] == boot_cpuid_phys) | |
226 | swap_cpuid = cpu; | |
227 | cpu_set(cpu, cpu_possible_map); | |
228 | cpu++; | |
229 | } | |
230 | } | |
231 | ||
232 | /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that | |
233 | * boot cpu is logical 0. | |
234 | */ | |
235 | if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { | |
236 | u32 tmp; | |
237 | tmp = get_hard_smp_processor_id(0); | |
238 | set_hard_smp_processor_id(0, boot_cpuid_phys); | |
239 | set_hard_smp_processor_id(swap_cpuid, tmp); | |
240 | } | |
241 | ||
242 | /* | |
243 | * On pSeries LPAR, we need to know how many cpus | |
244 | * could possibly be added to this partition. | |
245 | */ | |
246 | if (systemcfg->platform == PLATFORM_PSERIES_LPAR && | |
247 | (dn = of_find_node_by_path("/rtas"))) { | |
248 | int num_addr_cell, num_size_cell, maxcpus; | |
249 | unsigned int *ireg; | |
250 | ||
251 | num_addr_cell = prom_n_addr_cells(dn); | |
252 | num_size_cell = prom_n_size_cells(dn); | |
253 | ||
254 | ireg = (unsigned int *) | |
255 | get_property(dn, "ibm,lrdr-capacity", NULL); | |
256 | ||
257 | if (!ireg) | |
258 | goto out; | |
259 | ||
260 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
261 | ||
262 | /* Double maxcpus for processors which have SMT capability */ | |
263 | if (cpu_has_feature(CPU_FTR_SMT)) | |
264 | maxcpus *= 2; | |
265 | ||
266 | if (maxcpus > NR_CPUS) { | |
267 | printk(KERN_WARNING | |
268 | "Partition configured for %d cpus, " | |
269 | "operating system maximum is %d.\n", | |
270 | maxcpus, NR_CPUS); | |
271 | maxcpus = NR_CPUS; | |
272 | } else | |
273 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
274 | maxcpus); | |
275 | ||
276 | for (cpu = 0; cpu < maxcpus; cpu++) | |
277 | cpu_set(cpu, cpu_possible_map); | |
278 | out: | |
279 | of_node_put(dn); | |
280 | } | |
281 | ||
282 | /* | |
283 | * Do the sibling map; assume only two threads per processor. | |
284 | */ | |
285 | for_each_cpu(cpu) { | |
286 | cpu_set(cpu, cpu_sibling_map[cpu]); | |
287 | if (cpu_has_feature(CPU_FTR_SMT)) | |
288 | cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); | |
289 | } | |
290 | ||
291 | systemcfg->processorCount = num_present_cpus(); | |
292 | } | |
293 | #endif /* CONFIG_SMP */ | |
294 | ||
295 | extern struct machdep_calls pSeries_md; | |
296 | extern struct machdep_calls pmac_md; | |
297 | extern struct machdep_calls maple_md; | |
298 | extern struct machdep_calls bpa_md; | |
299 | extern struct machdep_calls iseries_md; | |
300 | ||
301 | /* Ultimately, stuff them in an elf section like initcalls... */ | |
302 | static struct machdep_calls __initdata *machines[] = { | |
303 | #ifdef CONFIG_PPC_PSERIES | |
304 | &pSeries_md, | |
305 | #endif /* CONFIG_PPC_PSERIES */ | |
306 | #ifdef CONFIG_PPC_PMAC | |
307 | &pmac_md, | |
308 | #endif /* CONFIG_PPC_PMAC */ | |
309 | #ifdef CONFIG_PPC_MAPLE | |
310 | &maple_md, | |
311 | #endif /* CONFIG_PPC_MAPLE */ | |
312 | #ifdef CONFIG_PPC_BPA | |
313 | &bpa_md, | |
314 | #endif | |
315 | #ifdef CONFIG_PPC_ISERIES | |
316 | &iseries_md, | |
317 | #endif | |
318 | NULL | |
319 | }; | |
320 | ||
321 | /* | |
322 | * Early initialization entry point. This is called by head.S | |
323 | * with MMU translation disabled. We rely on the "feature" of | |
324 | * the CPU that ignores the top 2 bits of the address in real | |
325 | * mode so we can access kernel globals normally provided we | |
326 | * only toy with things in the RMO region. From here, we do | |
327 | * some early parsing of the device-tree to setup out LMB | |
328 | * data structures, and allocate & initialize the hash table | |
329 | * and segment tables so we can start running with translation | |
330 | * enabled. | |
331 | * | |
332 | * It is this function which will call the probe() callback of | |
333 | * the various platform types and copy the matching one to the | |
334 | * global ppc_md structure. Your platform can eventually do | |
335 | * some very early initializations from the probe() routine, but | |
336 | * this is not recommended, be very careful as, for example, the | |
337 | * device-tree is not accessible via normal means at this point. | |
338 | */ | |
339 | ||
340 | void __init early_setup(unsigned long dt_ptr) | |
341 | { | |
342 | struct paca_struct *lpaca = get_paca(); | |
343 | static struct machdep_calls **mach; | |
344 | ||
345 | /* | |
346 | * Enable early debugging if any specified (see top of | |
347 | * this file) | |
348 | */ | |
349 | EARLY_DEBUG_INIT(); | |
350 | ||
351 | DBG(" -> early_setup()\n"); | |
352 | ||
353 | /* | |
354 | * Fill the default DBG level (do we want to keep | |
355 | * that old mecanism around forever ?) | |
356 | */ | |
357 | ppcdbg_initialize(); | |
358 | ||
359 | /* | |
360 | * Do early initializations using the flattened device | |
361 | * tree, like retreiving the physical memory map or | |
362 | * calculating/retreiving the hash table size | |
363 | */ | |
364 | early_init_devtree(__va(dt_ptr)); | |
365 | ||
366 | /* | |
367 | * Iterate all ppc_md structures until we find the proper | |
368 | * one for the current machine type | |
369 | */ | |
370 | DBG("Probing machine type for platform %x...\n", | |
371 | systemcfg->platform); | |
372 | ||
373 | for (mach = machines; *mach; mach++) { | |
374 | if ((*mach)->probe(systemcfg->platform)) | |
375 | break; | |
376 | } | |
377 | /* What can we do if we didn't find ? */ | |
378 | if (*mach == NULL) { | |
379 | DBG("No suitable machine found !\n"); | |
380 | for (;;); | |
381 | } | |
382 | ppc_md = **mach; | |
383 | ||
384 | DBG("Found, Initializing memory management...\n"); | |
385 | ||
386 | /* | |
387 | * Initialize stab / SLB management | |
388 | */ | |
389 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) | |
390 | stab_initialize(lpaca->stab_real); | |
391 | ||
392 | /* | |
393 | * Initialize the MMU Hash table and create the linear mapping | |
394 | * of memory | |
395 | */ | |
396 | htab_initialize(); | |
397 | ||
398 | DBG(" <- early_setup()\n"); | |
399 | } | |
400 | ||
401 | ||
402 | /* | |
403 | * Initialize some remaining members of the ppc64_caches and systemcfg structures | |
404 | * (at least until we get rid of them completely). This is mostly some | |
405 | * cache informations about the CPU that will be used by cache flush | |
406 | * routines and/or provided to userland | |
407 | */ | |
408 | static void __init initialize_cache_info(void) | |
409 | { | |
410 | struct device_node *np; | |
411 | unsigned long num_cpus = 0; | |
412 | ||
413 | DBG(" -> initialize_cache_info()\n"); | |
414 | ||
415 | for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { | |
416 | num_cpus += 1; | |
417 | ||
418 | /* We're assuming *all* of the CPUs have the same | |
419 | * d-cache and i-cache sizes... -Peter | |
420 | */ | |
421 | ||
422 | if ( num_cpus == 1 ) { | |
423 | u32 *sizep, *lsizep; | |
424 | u32 size, lsize; | |
425 | const char *dc, *ic; | |
426 | ||
427 | /* Then read cache informations */ | |
428 | if (systemcfg->platform == PLATFORM_POWERMAC) { | |
429 | dc = "d-cache-block-size"; | |
430 | ic = "i-cache-block-size"; | |
431 | } else { | |
432 | dc = "d-cache-line-size"; | |
433 | ic = "i-cache-line-size"; | |
434 | } | |
435 | ||
436 | size = 0; | |
437 | lsize = cur_cpu_spec->dcache_bsize; | |
438 | sizep = (u32 *)get_property(np, "d-cache-size", NULL); | |
439 | if (sizep != NULL) | |
440 | size = *sizep; | |
441 | lsizep = (u32 *) get_property(np, dc, NULL); | |
442 | if (lsizep != NULL) | |
443 | lsize = *lsizep; | |
444 | if (sizep == 0 || lsizep == 0) | |
445 | DBG("Argh, can't find dcache properties ! " | |
446 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
447 | ||
448 | systemcfg->dcache_size = ppc64_caches.dsize = size; | |
449 | systemcfg->dcache_line_size = | |
450 | ppc64_caches.dline_size = lsize; | |
451 | ppc64_caches.log_dline_size = __ilog2(lsize); | |
452 | ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; | |
453 | ||
454 | size = 0; | |
455 | lsize = cur_cpu_spec->icache_bsize; | |
456 | sizep = (u32 *)get_property(np, "i-cache-size", NULL); | |
457 | if (sizep != NULL) | |
458 | size = *sizep; | |
459 | lsizep = (u32 *)get_property(np, ic, NULL); | |
460 | if (lsizep != NULL) | |
461 | lsize = *lsizep; | |
462 | if (sizep == 0 || lsizep == 0) | |
463 | DBG("Argh, can't find icache properties ! " | |
464 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
465 | ||
466 | systemcfg->icache_size = ppc64_caches.isize = size; | |
467 | systemcfg->icache_line_size = | |
468 | ppc64_caches.iline_size = lsize; | |
469 | ppc64_caches.log_iline_size = __ilog2(lsize); | |
470 | ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; | |
471 | } | |
472 | } | |
473 | ||
474 | /* Add an eye catcher and the systemcfg layout version number */ | |
475 | strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); | |
476 | systemcfg->version.major = SYSTEMCFG_MAJOR; | |
477 | systemcfg->version.minor = SYSTEMCFG_MINOR; | |
478 | systemcfg->processor = mfspr(SPRN_PVR); | |
479 | ||
480 | DBG(" <- initialize_cache_info()\n"); | |
481 | } | |
482 | ||
483 | static void __init check_for_initrd(void) | |
484 | { | |
485 | #ifdef CONFIG_BLK_DEV_INITRD | |
486 | u64 *prop; | |
487 | ||
488 | DBG(" -> check_for_initrd()\n"); | |
489 | ||
490 | if (of_chosen) { | |
491 | prop = (u64 *)get_property(of_chosen, | |
492 | "linux,initrd-start", NULL); | |
493 | if (prop != NULL) { | |
494 | initrd_start = (unsigned long)__va(*prop); | |
495 | prop = (u64 *)get_property(of_chosen, | |
496 | "linux,initrd-end", NULL); | |
497 | if (prop != NULL) { | |
498 | initrd_end = (unsigned long)__va(*prop); | |
499 | initrd_below_start_ok = 1; | |
500 | } else | |
501 | initrd_start = 0; | |
502 | } | |
503 | } | |
504 | ||
505 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
506 | * look sensible. If not, clear initrd reference. | |
507 | */ | |
508 | if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE && | |
509 | initrd_end > initrd_start) | |
510 | ROOT_DEV = Root_RAM0; | |
511 | else | |
512 | initrd_start = initrd_end = 0; | |
513 | ||
514 | if (initrd_start) | |
515 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
516 | ||
517 | DBG(" <- check_for_initrd()\n"); | |
518 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
519 | } | |
520 | ||
521 | /* | |
522 | * Do some initial setup of the system. The parameters are those which | |
523 | * were passed in from the bootloader. | |
524 | */ | |
525 | void __init setup_system(void) | |
526 | { | |
527 | DBG(" -> setup_system()\n"); | |
528 | ||
529 | /* | |
530 | * Unflatten the device-tree passed by prom_init or kexec | |
531 | */ | |
532 | unflatten_device_tree(); | |
533 | ||
534 | /* | |
535 | * Fill the ppc64_caches & systemcfg structures with informations | |
536 | * retreived from the device-tree. Need to be called before | |
537 | * finish_device_tree() since the later requires some of the | |
538 | * informations filled up here to properly parse the interrupt | |
539 | * tree. | |
540 | * It also sets up the cache line sizes which allows to call | |
541 | * routines like flush_icache_range (used by the hash init | |
542 | * later on). | |
543 | */ | |
544 | initialize_cache_info(); | |
545 | ||
546 | #ifdef CONFIG_PPC_RTAS | |
547 | /* | |
548 | * Initialize RTAS if available | |
549 | */ | |
550 | rtas_initialize(); | |
551 | #endif /* CONFIG_PPC_RTAS */ | |
40ef8cbc PM |
552 | |
553 | /* | |
554 | * Check if we have an initrd provided via the device-tree | |
555 | */ | |
556 | check_for_initrd(); | |
40ef8cbc PM |
557 | |
558 | /* | |
559 | * Do some platform specific early initializations, that includes | |
560 | * setting up the hash table pointers. It also sets up some interrupt-mapping | |
561 | * related options that will be used by finish_device_tree() | |
562 | */ | |
563 | ppc_md.init_early(); | |
40ef8cbc PM |
564 | |
565 | /* | |
566 | * "Finish" the device-tree, that is do the actual parsing of | |
567 | * some of the properties like the interrupt map | |
568 | */ | |
569 | finish_device_tree(); | |
40ef8cbc | 570 | |
0458060c PM |
571 | #ifdef CONFIG_BOOTX_TEXT |
572 | init_boot_display(); | |
573 | #endif | |
574 | ||
40ef8cbc PM |
575 | /* |
576 | * Initialize xmon | |
577 | */ | |
578 | #ifdef CONFIG_XMON_DEFAULT | |
579 | xmon_init(1); | |
580 | #endif | |
40ef8cbc PM |
581 | /* |
582 | * Register early console | |
583 | */ | |
584 | register_early_udbg_console(); | |
40ef8cbc PM |
585 | |
586 | /* Save unparsed command line copy for /proc/cmdline */ | |
587 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
588 | ||
589 | parse_early_param(); | |
40ef8cbc PM |
590 | |
591 | #ifdef CONFIG_SMP | |
592 | /* | |
593 | * iSeries has already initialized the cpu maps at this point. | |
594 | */ | |
595 | setup_cpu_maps(); | |
40ef8cbc PM |
596 | |
597 | /* Release secondary cpus out of their spinloops at 0x60 now that | |
598 | * we can map physical -> logical CPU ids | |
599 | */ | |
600 | smp_release_cpus(); | |
40ef8cbc PM |
601 | #endif |
602 | ||
603 | printk("Starting Linux PPC64 %s\n", system_utsname.version); | |
604 | ||
605 | printk("-----------------------------------------------------\n"); | |
606 | printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); | |
607 | printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); | |
608 | printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); | |
609 | printk("systemcfg = 0x%p\n", systemcfg); | |
610 | printk("systemcfg->platform = 0x%x\n", systemcfg->platform); | |
611 | printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); | |
612 | printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); | |
613 | printk("ppc64_caches.dcache_line_size = 0x%x\n", | |
614 | ppc64_caches.dline_size); | |
615 | printk("ppc64_caches.icache_line_size = 0x%x\n", | |
616 | ppc64_caches.iline_size); | |
617 | printk("htab_address = 0x%p\n", htab_address); | |
618 | printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); | |
619 | printk("-----------------------------------------------------\n"); | |
40ef8cbc PM |
620 | |
621 | mm_init_ppc64(); | |
40ef8cbc PM |
622 | |
623 | DBG(" <- setup_system()\n"); | |
624 | } | |
625 | ||
40ef8cbc PM |
626 | static int ppc64_panic_event(struct notifier_block *this, |
627 | unsigned long event, void *ptr) | |
628 | { | |
629 | ppc_md.panic((char *)ptr); /* May not return */ | |
630 | return NOTIFY_DONE; | |
631 | } | |
632 | ||
40ef8cbc PM |
633 | /* |
634 | * These three variables are used to save values passed to us by prom_init() | |
635 | * via the device tree. The TCE variables are needed because with a memory_limit | |
636 | * in force we may need to explicitly map the TCE are at the top of RAM. | |
637 | */ | |
638 | unsigned long memory_limit; | |
639 | unsigned long tce_alloc_start; | |
640 | unsigned long tce_alloc_end; | |
641 | ||
642 | #ifdef CONFIG_PPC_ISERIES | |
643 | /* | |
644 | * On iSeries we just parse the mem=X option from the command line. | |
645 | * On pSeries it's a bit more complicated, see prom_init_mem() | |
646 | */ | |
647 | static int __init early_parsemem(char *p) | |
648 | { | |
649 | if (!p) | |
650 | return 0; | |
651 | ||
652 | memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE); | |
653 | ||
654 | return 0; | |
655 | } | |
656 | early_param("mem", early_parsemem); | |
657 | #endif /* CONFIG_PPC_ISERIES */ | |
658 | ||
40ef8cbc PM |
659 | #ifdef CONFIG_IRQSTACKS |
660 | static void __init irqstack_early_init(void) | |
661 | { | |
662 | unsigned int i; | |
663 | ||
664 | /* | |
665 | * interrupt stacks must be under 256MB, we cannot afford to take | |
666 | * SLB misses on them. | |
667 | */ | |
668 | for_each_cpu(i) { | |
669 | softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, | |
670 | THREAD_SIZE, 0x10000000)); | |
671 | hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, | |
672 | THREAD_SIZE, 0x10000000)); | |
673 | } | |
674 | } | |
675 | #else | |
676 | #define irqstack_early_init() | |
677 | #endif | |
678 | ||
679 | /* | |
680 | * Stack space used when we detect a bad kernel stack pointer, and | |
681 | * early in SMP boots before relocation is enabled. | |
682 | */ | |
683 | static void __init emergency_stack_init(void) | |
684 | { | |
685 | unsigned long limit; | |
686 | unsigned int i; | |
687 | ||
688 | /* | |
689 | * Emergency stacks must be under 256MB, we cannot afford to take | |
690 | * SLB misses on them. The ABI also requires them to be 128-byte | |
691 | * aligned. | |
692 | * | |
693 | * Since we use these as temporary stacks during secondary CPU | |
694 | * bringup, we need to get at them in real mode. This means they | |
695 | * must also be within the RMO region. | |
696 | */ | |
697 | limit = min(0x10000000UL, lmb.rmo_size); | |
698 | ||
699 | for_each_cpu(i) | |
700 | paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128, | |
701 | limit)) + PAGE_SIZE; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Called from setup_arch to initialize the bitmap of available | |
706 | * syscalls in the systemcfg page | |
707 | */ | |
708 | void __init setup_syscall_map(void) | |
709 | { | |
710 | unsigned int i, count64 = 0, count32 = 0; | |
640768ee SR |
711 | extern unsigned long *sys_call_table; |
712 | extern unsigned long sys_ni_syscall; | |
713 | ||
40ef8cbc PM |
714 | |
715 | for (i = 0; i < __NR_syscalls; i++) { | |
640768ee | 716 | if (sys_call_table[i*2] != sys_ni_syscall) { |
40ef8cbc PM |
717 | count64++; |
718 | systemcfg->syscall_map_64[i >> 5] |= | |
719 | 0x80000000UL >> (i & 0x1f); | |
720 | } | |
640768ee | 721 | if (sys_call_table[i*2+1] != sys_ni_syscall) { |
40ef8cbc PM |
722 | count32++; |
723 | systemcfg->syscall_map_32[i >> 5] |= | |
724 | 0x80000000UL >> (i & 0x1f); | |
725 | } | |
726 | } | |
727 | printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", | |
728 | count32, count64); | |
729 | } | |
730 | ||
731 | /* | |
732 | * Called into from start_kernel, after lock_kernel has been called. | |
733 | * Initializes bootmem, which is unsed to manage page allocation until | |
734 | * mem_init is called. | |
735 | */ | |
736 | void __init setup_arch(char **cmdline_p) | |
737 | { | |
738 | extern void do_init_bootmem(void); | |
739 | ||
40ef8cbc PM |
740 | ppc64_boot_msg(0x12, "Setup Arch"); |
741 | ||
742 | *cmdline_p = cmd_line; | |
743 | ||
744 | /* | |
745 | * Set cache line size based on type of cpu as a default. | |
746 | * Systems with OF can look in the properties on the cpu node(s) | |
747 | * for a possibly more accurate value. | |
748 | */ | |
749 | dcache_bsize = ppc64_caches.dline_size; | |
750 | icache_bsize = ppc64_caches.iline_size; | |
751 | ||
752 | /* reboot on panic */ | |
753 | panic_timeout = 180; | |
40ef8cbc PM |
754 | |
755 | if (ppc_md.panic) | |
756 | notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); | |
757 | ||
758 | init_mm.start_code = PAGE_OFFSET; | |
759 | init_mm.end_code = (unsigned long) _etext; | |
760 | init_mm.end_data = (unsigned long) _edata; | |
761 | init_mm.brk = klimit; | |
762 | ||
763 | irqstack_early_init(); | |
764 | emergency_stack_init(); | |
765 | ||
40ef8cbc PM |
766 | stabs_alloc(); |
767 | ||
768 | /* set up the bootmem stuff with available memory */ | |
769 | do_init_bootmem(); | |
770 | sparse_init(); | |
771 | ||
40ef8cbc PM |
772 | /* initialize the syscall map in systemcfg */ |
773 | setup_syscall_map(); | |
774 | ||
0458060c PM |
775 | #ifdef CONFIG_DUMMY_CONSOLE |
776 | conswitchp = &dummy_con; | |
777 | #endif | |
778 | ||
40ef8cbc PM |
779 | ppc_md.setup_arch(); |
780 | ||
781 | /* Use the default idle loop if the platform hasn't provided one. */ | |
782 | if (NULL == ppc_md.idle_loop) { | |
783 | ppc_md.idle_loop = default_idle; | |
784 | printk(KERN_INFO "Using default idle loop\n"); | |
785 | } | |
786 | ||
787 | paging_init(); | |
788 | ppc64_boot_msg(0x15, "Setup Done"); | |
789 | } | |
790 | ||
791 | ||
792 | /* ToDo: do something useful if ppc_md is not yet setup. */ | |
793 | #define PPC64_LINUX_FUNCTION 0x0f000000 | |
794 | #define PPC64_IPL_MESSAGE 0xc0000000 | |
795 | #define PPC64_TERM_MESSAGE 0xb0000000 | |
796 | ||
797 | static void ppc64_do_msg(unsigned int src, const char *msg) | |
798 | { | |
799 | if (ppc_md.progress) { | |
800 | char buf[128]; | |
801 | ||
802 | sprintf(buf, "%08X\n", src); | |
803 | ppc_md.progress(buf, 0); | |
804 | snprintf(buf, 128, "%s", msg); | |
805 | ppc_md.progress(buf, 0); | |
806 | } | |
807 | } | |
808 | ||
809 | /* Print a boot progress message. */ | |
810 | void ppc64_boot_msg(unsigned int src, const char *msg) | |
811 | { | |
812 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); | |
813 | printk("[boot]%04x %s\n", src, msg); | |
814 | } | |
815 | ||
816 | /* Print a termination message (print only -- does not stop the kernel) */ | |
817 | void ppc64_terminate_msg(unsigned int src, const char *msg) | |
818 | { | |
819 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); | |
820 | printk("[terminate]%04x %s\n", src, msg); | |
821 | } | |
822 | ||
40ef8cbc PM |
823 | #ifndef CONFIG_PPC_ISERIES |
824 | /* | |
825 | * This function can be used by platforms to "find" legacy serial ports. | |
826 | * It works for "serial" nodes under an "isa" node, and will try to | |
827 | * respect the "ibm,aix-loc" property if any. It works with up to 8 | |
828 | * ports. | |
829 | */ | |
830 | ||
831 | #define MAX_LEGACY_SERIAL_PORTS 8 | |
832 | static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; | |
833 | static unsigned int old_serial_count; | |
834 | ||
835 | void __init generic_find_legacy_serial_ports(u64 *physport, | |
836 | unsigned int *default_speed) | |
837 | { | |
838 | struct device_node *np; | |
839 | u32 *sizeprop; | |
840 | ||
841 | struct isa_reg_property { | |
842 | u32 space; | |
843 | u32 address; | |
844 | u32 size; | |
845 | }; | |
846 | struct pci_reg_property { | |
847 | struct pci_address addr; | |
848 | u32 size_hi; | |
849 | u32 size_lo; | |
850 | }; | |
851 | ||
852 | DBG(" -> generic_find_legacy_serial_port()\n"); | |
853 | ||
854 | *physport = 0; | |
855 | if (default_speed) | |
856 | *default_speed = 0; | |
857 | ||
858 | np = of_find_node_by_path("/"); | |
859 | if (!np) | |
860 | return; | |
861 | ||
862 | /* First fill our array */ | |
863 | for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { | |
864 | struct device_node *isa, *pci; | |
865 | struct isa_reg_property *reg; | |
866 | unsigned long phys_size, addr_size, io_base; | |
867 | u32 *rangesp; | |
868 | u32 *interrupts, *clk, *spd; | |
869 | char *typep; | |
870 | int index, rlen, rentsize; | |
871 | ||
872 | /* Ok, first check if it's under an "isa" parent */ | |
873 | isa = of_get_parent(np); | |
874 | if (!isa || strcmp(isa->name, "isa")) { | |
875 | DBG("%s: no isa parent found\n", np->full_name); | |
876 | continue; | |
877 | } | |
878 | ||
879 | /* Now look for an "ibm,aix-loc" property that gives us ordering | |
880 | * if any... | |
881 | */ | |
882 | typep = (char *)get_property(np, "ibm,aix-loc", NULL); | |
883 | ||
884 | /* Get the ISA port number */ | |
885 | reg = (struct isa_reg_property *)get_property(np, "reg", NULL); | |
886 | if (reg == NULL) | |
887 | goto next_port; | |
888 | /* We assume the interrupt number isn't translated ... */ | |
889 | interrupts = (u32 *)get_property(np, "interrupts", NULL); | |
890 | /* get clock freq. if present */ | |
891 | clk = (u32 *)get_property(np, "clock-frequency", NULL); | |
892 | /* get default speed if present */ | |
893 | spd = (u32 *)get_property(np, "current-speed", NULL); | |
894 | /* Default to locate at end of array */ | |
895 | index = old_serial_count; /* end of the array by default */ | |
896 | ||
897 | /* If we have a location index, then use it */ | |
898 | if (typep && *typep == 'S') { | |
899 | index = simple_strtol(typep+1, NULL, 0) - 1; | |
900 | /* if index is out of range, use end of array instead */ | |
901 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
902 | index = old_serial_count; | |
903 | /* if our index is still out of range, that mean that | |
904 | * array is full, we could scan for a free slot but that | |
905 | * make little sense to bother, just skip the port | |
906 | */ | |
907 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
908 | goto next_port; | |
909 | if (index >= old_serial_count) | |
910 | old_serial_count = index + 1; | |
911 | /* Check if there is a port who already claimed our slot */ | |
912 | if (serial_ports[index].iobase != 0) { | |
913 | /* if we still have some room, move it, else override */ | |
914 | if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { | |
915 | DBG("Moved legacy port %d -> %d\n", index, | |
916 | old_serial_count); | |
917 | serial_ports[old_serial_count++] = | |
918 | serial_ports[index]; | |
919 | } else { | |
920 | DBG("Replacing legacy port %d\n", index); | |
921 | } | |
922 | } | |
923 | } | |
924 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
925 | goto next_port; | |
926 | if (index >= old_serial_count) | |
927 | old_serial_count = index + 1; | |
928 | ||
929 | /* Now fill the entry */ | |
930 | memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); | |
931 | serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; | |
932 | serial_ports[index].iobase = reg->address; | |
933 | serial_ports[index].irq = interrupts ? interrupts[0] : 0; | |
934 | serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; | |
935 | ||
936 | DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", | |
937 | index, | |
938 | serial_ports[index].iobase, | |
939 | serial_ports[index].irq, | |
940 | serial_ports[index].uartclk); | |
941 | ||
942 | /* Get phys address of IO reg for port 1 */ | |
943 | if (index != 0) | |
944 | goto next_port; | |
945 | ||
946 | pci = of_get_parent(isa); | |
947 | if (!pci) { | |
948 | DBG("%s: no pci parent found\n", np->full_name); | |
949 | goto next_port; | |
950 | } | |
951 | ||
952 | rangesp = (u32 *)get_property(pci, "ranges", &rlen); | |
953 | if (rangesp == NULL) { | |
954 | of_node_put(pci); | |
955 | goto next_port; | |
956 | } | |
957 | rlen /= 4; | |
958 | ||
959 | /* we need the #size-cells of the PCI bridge node itself */ | |
960 | phys_size = 1; | |
961 | sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); | |
962 | if (sizeprop != NULL) | |
963 | phys_size = *sizeprop; | |
964 | /* we need the parent #addr-cells */ | |
965 | addr_size = prom_n_addr_cells(pci); | |
966 | rentsize = 3 + addr_size + phys_size; | |
967 | io_base = 0; | |
968 | for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { | |
969 | if (((rangesp[0] >> 24) & 0x3) != 1) | |
970 | continue; /* not IO space */ | |
971 | io_base = rangesp[3]; | |
972 | if (addr_size == 2) | |
973 | io_base = (io_base << 32) | rangesp[4]; | |
974 | } | |
975 | if (io_base != 0) { | |
976 | *physport = io_base + reg->address; | |
977 | if (default_speed && spd) | |
978 | *default_speed = *spd; | |
979 | } | |
980 | of_node_put(pci); | |
981 | next_port: | |
982 | of_node_put(isa); | |
983 | } | |
984 | ||
985 | DBG(" <- generic_find_legacy_serial_port()\n"); | |
986 | } | |
987 | ||
988 | static struct platform_device serial_device = { | |
989 | .name = "serial8250", | |
990 | .id = PLAT8250_DEV_PLATFORM, | |
991 | .dev = { | |
992 | .platform_data = serial_ports, | |
993 | }, | |
994 | }; | |
995 | ||
996 | static int __init serial_dev_init(void) | |
997 | { | |
998 | return platform_device_register(&serial_device); | |
999 | } | |
1000 | arch_initcall(serial_dev_init); | |
1001 | ||
1002 | #endif /* CONFIG_PPC_ISERIES */ | |
1003 | ||
1004 | int check_legacy_ioport(unsigned long base_port) | |
1005 | { | |
1006 | if (ppc_md.check_legacy_ioport == NULL) | |
1007 | return 0; | |
1008 | return ppc_md.check_legacy_ioport(base_port); | |
1009 | } | |
1010 | EXPORT_SYMBOL(check_legacy_ioport); | |
1011 | ||
1012 | #ifdef CONFIG_XMON | |
1013 | static int __init early_xmon(char *p) | |
1014 | { | |
1015 | /* ensure xmon is enabled */ | |
1016 | if (p) { | |
1017 | if (strncmp(p, "on", 2) == 0) | |
1018 | xmon_init(1); | |
1019 | if (strncmp(p, "off", 3) == 0) | |
1020 | xmon_init(0); | |
1021 | if (strncmp(p, "early", 5) != 0) | |
1022 | return 0; | |
1023 | } | |
1024 | xmon_init(1); | |
1025 | debugger(NULL); | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | early_param("xmon", early_xmon); | |
1030 | #endif | |
1031 | ||
1032 | void cpu_die(void) | |
1033 | { | |
1034 | if (ppc_md.cpu_die) | |
1035 | ppc_md.cpu_die(); | |
1036 | } |