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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> | |
1da177e4 LT |
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> | |
0bc0ffd5 SR |
59 | #include <asm/lmb.h> |
60 | #include <asm/iSeries/ItLpNaca.h> | |
1da177e4 LT |
61 | |
62 | #ifdef DEBUG | |
63 | #define DBG(fmt...) udbg_printf(fmt) | |
64 | #else | |
65 | #define DBG(fmt...) | |
66 | #endif | |
67 | ||
68 | /* | |
69 | * Here are some early debugging facilities. You can enable one | |
70 | * but your kernel will not boot on anything else if you do so | |
71 | */ | |
72 | ||
73 | /* This one is for use on LPAR machines that support an HVC console | |
74 | * on vterm 0 | |
75 | */ | |
76 | extern void udbg_init_debug_lpar(void); | |
77 | /* This one is for use on Apple G5 machines | |
78 | */ | |
79 | extern void udbg_init_pmac_realmode(void); | |
80 | /* That's RTAS panel debug */ | |
81 | extern void call_rtas_display_status_delay(unsigned char c); | |
82 | /* Here's maple real mode debug */ | |
83 | extern void udbg_init_maple_realmode(void); | |
84 | ||
85 | #define EARLY_DEBUG_INIT() do {} while(0) | |
86 | ||
87 | #if 0 | |
88 | #define EARLY_DEBUG_INIT() udbg_init_debug_lpar() | |
89 | #define EARLY_DEBUG_INIT() udbg_init_maple_realmode() | |
90 | #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() | |
91 | #define EARLY_DEBUG_INIT() \ | |
92 | do { ppc_md.udbg_putc = call_rtas_display_status_delay; } while(0) | |
93 | #endif | |
94 | ||
95 | /* extern void *stab; */ | |
96 | extern unsigned long klimit; | |
97 | ||
98 | extern void mm_init_ppc64(void); | |
1da177e4 LT |
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 | ||
1da177e4 LT |
106 | int have_of = 1; |
107 | int boot_cpuid = 0; | |
108 | int boot_cpuid_phys = 0; | |
109 | dev_t boot_dev; | |
110 | u64 ppc64_pft_size; | |
111 | u64 ppc64_debug_switch; | |
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 | ||
140 | /* | |
141 | * Perhaps we can put the pmac screen_info[] here | |
142 | * on pmac as well so we don't need the ifdef's. | |
143 | * Until we get multiple-console support in here | |
144 | * that is. -- Cort | |
145 | * Maybe tie it to serial consoles, since this is really what | |
146 | * these processors use on existing boards. -- Dan | |
147 | */ | |
148 | struct screen_info screen_info = { | |
149 | .orig_x = 0, | |
150 | .orig_y = 25, | |
151 | .orig_video_cols = 80, | |
152 | .orig_video_lines = 25, | |
153 | .orig_video_isVGA = 1, | |
154 | .orig_video_points = 16 | |
155 | }; | |
156 | ||
157 | /* | |
158 | * Initialize the PPCDBG state. Called before relocation has been enabled. | |
159 | */ | |
160 | void __init ppcdbg_initialize(void) | |
161 | { | |
162 | ppc64_debug_switch = PPC_DEBUG_DEFAULT; /* | PPCDBG_BUSWALK | */ | |
163 | /* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */; | |
164 | } | |
165 | ||
166 | /* | |
167 | * Early boot console based on udbg | |
168 | */ | |
169 | static struct console udbg_console = { | |
170 | .name = "udbg", | |
171 | .write = udbg_console_write, | |
172 | .flags = CON_PRINTBUFFER, | |
173 | .index = -1, | |
174 | }; | |
175 | static int early_console_initialized; | |
176 | ||
177 | void __init disable_early_printk(void) | |
178 | { | |
179 | if (!early_console_initialized) | |
180 | return; | |
181 | unregister_console(&udbg_console); | |
182 | early_console_initialized = 0; | |
183 | } | |
184 | ||
185 | #if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) | |
186 | ||
187 | static int smt_enabled_cmdline; | |
188 | ||
189 | /* Look for ibm,smt-enabled OF option */ | |
190 | static void check_smt_enabled(void) | |
191 | { | |
192 | struct device_node *dn; | |
193 | char *smt_option; | |
194 | ||
195 | /* Allow the command line to overrule the OF option */ | |
196 | if (smt_enabled_cmdline) | |
197 | return; | |
198 | ||
199 | dn = of_find_node_by_path("/options"); | |
200 | ||
201 | if (dn) { | |
202 | smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); | |
203 | ||
204 | if (smt_option) { | |
205 | if (!strcmp(smt_option, "on")) | |
206 | smt_enabled_at_boot = 1; | |
207 | else if (!strcmp(smt_option, "off")) | |
208 | smt_enabled_at_boot = 0; | |
209 | } | |
210 | } | |
211 | } | |
212 | ||
213 | /* Look for smt-enabled= cmdline option */ | |
214 | static int __init early_smt_enabled(char *p) | |
215 | { | |
216 | smt_enabled_cmdline = 1; | |
217 | ||
218 | if (!p) | |
219 | return 0; | |
220 | ||
221 | if (!strcmp(p, "on") || !strcmp(p, "1")) | |
222 | smt_enabled_at_boot = 1; | |
223 | else if (!strcmp(p, "off") || !strcmp(p, "0")) | |
224 | smt_enabled_at_boot = 0; | |
225 | ||
226 | return 0; | |
227 | } | |
228 | early_param("smt-enabled", early_smt_enabled); | |
229 | ||
230 | /** | |
231 | * setup_cpu_maps - initialize the following cpu maps: | |
232 | * cpu_possible_map | |
233 | * cpu_present_map | |
234 | * cpu_sibling_map | |
235 | * | |
236 | * Having the possible map set up early allows us to restrict allocations | |
237 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
238 | * | |
239 | * We do not initialize the online map here; cpus set their own bits in | |
240 | * cpu_online_map as they come up. | |
241 | * | |
242 | * This function is valid only for Open Firmware systems. finish_device_tree | |
243 | * must be called before using this. | |
244 | * | |
245 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
246 | */ | |
247 | static void __init setup_cpu_maps(void) | |
248 | { | |
249 | struct device_node *dn = NULL; | |
250 | int cpu = 0; | |
251 | int swap_cpuid = 0; | |
252 | ||
253 | check_smt_enabled(); | |
254 | ||
255 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
256 | u32 *intserv; | |
257 | int j, len = sizeof(u32), nthreads; | |
258 | ||
259 | intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s", | |
260 | &len); | |
261 | if (!intserv) | |
262 | intserv = (u32 *)get_property(dn, "reg", NULL); | |
263 | ||
264 | nthreads = len / sizeof(u32); | |
265 | ||
266 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
267 | cpu_set(cpu, cpu_present_map); | |
268 | set_hard_smp_processor_id(cpu, intserv[j]); | |
269 | ||
270 | if (intserv[j] == boot_cpuid_phys) | |
271 | swap_cpuid = cpu; | |
272 | cpu_set(cpu, cpu_possible_map); | |
273 | cpu++; | |
274 | } | |
275 | } | |
276 | ||
277 | /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that | |
278 | * boot cpu is logical 0. | |
279 | */ | |
280 | if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { | |
281 | u32 tmp; | |
282 | tmp = get_hard_smp_processor_id(0); | |
283 | set_hard_smp_processor_id(0, boot_cpuid_phys); | |
284 | set_hard_smp_processor_id(swap_cpuid, tmp); | |
285 | } | |
286 | ||
287 | /* | |
288 | * On pSeries LPAR, we need to know how many cpus | |
289 | * could possibly be added to this partition. | |
290 | */ | |
291 | if (systemcfg->platform == PLATFORM_PSERIES_LPAR && | |
292 | (dn = of_find_node_by_path("/rtas"))) { | |
293 | int num_addr_cell, num_size_cell, maxcpus; | |
294 | unsigned int *ireg; | |
295 | ||
296 | num_addr_cell = prom_n_addr_cells(dn); | |
297 | num_size_cell = prom_n_size_cells(dn); | |
298 | ||
299 | ireg = (unsigned int *) | |
300 | get_property(dn, "ibm,lrdr-capacity", NULL); | |
301 | ||
302 | if (!ireg) | |
303 | goto out; | |
304 | ||
305 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
306 | ||
307 | /* Double maxcpus for processors which have SMT capability */ | |
308 | if (cpu_has_feature(CPU_FTR_SMT)) | |
309 | maxcpus *= 2; | |
310 | ||
311 | if (maxcpus > NR_CPUS) { | |
312 | printk(KERN_WARNING | |
313 | "Partition configured for %d cpus, " | |
314 | "operating system maximum is %d.\n", | |
315 | maxcpus, NR_CPUS); | |
316 | maxcpus = NR_CPUS; | |
317 | } else | |
318 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
319 | maxcpus); | |
320 | ||
321 | for (cpu = 0; cpu < maxcpus; cpu++) | |
322 | cpu_set(cpu, cpu_possible_map); | |
323 | out: | |
324 | of_node_put(dn); | |
325 | } | |
326 | ||
327 | /* | |
328 | * Do the sibling map; assume only two threads per processor. | |
329 | */ | |
330 | for_each_cpu(cpu) { | |
331 | cpu_set(cpu, cpu_sibling_map[cpu]); | |
332 | if (cpu_has_feature(CPU_FTR_SMT)) | |
333 | cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); | |
334 | } | |
335 | ||
336 | systemcfg->processorCount = num_present_cpus(); | |
337 | } | |
338 | #endif /* defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) */ | |
339 | ||
340 | ||
341 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
342 | ||
343 | extern struct machdep_calls pSeries_md; | |
344 | extern struct machdep_calls pmac_md; | |
345 | extern struct machdep_calls maple_md; | |
fef1c772 | 346 | extern struct machdep_calls bpa_md; |
1da177e4 LT |
347 | |
348 | /* Ultimately, stuff them in an elf section like initcalls... */ | |
349 | static struct machdep_calls __initdata *machines[] = { | |
350 | #ifdef CONFIG_PPC_PSERIES | |
351 | &pSeries_md, | |
352 | #endif /* CONFIG_PPC_PSERIES */ | |
353 | #ifdef CONFIG_PPC_PMAC | |
354 | &pmac_md, | |
355 | #endif /* CONFIG_PPC_PMAC */ | |
356 | #ifdef CONFIG_PPC_MAPLE | |
357 | &maple_md, | |
358 | #endif /* CONFIG_PPC_MAPLE */ | |
fef1c772 AB |
359 | #ifdef CONFIG_PPC_BPA |
360 | &bpa_md, | |
361 | #endif | |
1da177e4 LT |
362 | NULL |
363 | }; | |
364 | ||
365 | /* | |
366 | * Early initialization entry point. This is called by head.S | |
367 | * with MMU translation disabled. We rely on the "feature" of | |
368 | * the CPU that ignores the top 2 bits of the address in real | |
369 | * mode so we can access kernel globals normally provided we | |
370 | * only toy with things in the RMO region. From here, we do | |
371 | * some early parsing of the device-tree to setup out LMB | |
372 | * data structures, and allocate & initialize the hash table | |
373 | * and segment tables so we can start running with translation | |
374 | * enabled. | |
375 | * | |
376 | * It is this function which will call the probe() callback of | |
377 | * the various platform types and copy the matching one to the | |
378 | * global ppc_md structure. Your platform can eventually do | |
379 | * some very early initializations from the probe() routine, but | |
380 | * this is not recommended, be very careful as, for example, the | |
381 | * device-tree is not accessible via normal means at this point. | |
382 | */ | |
383 | ||
384 | void __init early_setup(unsigned long dt_ptr) | |
385 | { | |
386 | struct paca_struct *lpaca = get_paca(); | |
387 | static struct machdep_calls **mach; | |
388 | ||
389 | /* | |
390 | * Enable early debugging if any specified (see top of | |
391 | * this file) | |
392 | */ | |
393 | EARLY_DEBUG_INIT(); | |
394 | ||
395 | DBG(" -> early_setup()\n"); | |
396 | ||
397 | /* | |
398 | * Fill the default DBG level (do we want to keep | |
399 | * that old mecanism around forever ?) | |
400 | */ | |
401 | ppcdbg_initialize(); | |
402 | ||
403 | /* | |
404 | * Do early initializations using the flattened device | |
405 | * tree, like retreiving the physical memory map or | |
406 | * calculating/retreiving the hash table size | |
407 | */ | |
408 | early_init_devtree(__va(dt_ptr)); | |
409 | ||
410 | /* | |
411 | * Iterate all ppc_md structures until we find the proper | |
412 | * one for the current machine type | |
413 | */ | |
414 | DBG("Probing machine type for platform %x...\n", | |
415 | systemcfg->platform); | |
416 | ||
417 | for (mach = machines; *mach; mach++) { | |
418 | if ((*mach)->probe(systemcfg->platform)) | |
419 | break; | |
420 | } | |
421 | /* What can we do if we didn't find ? */ | |
422 | if (*mach == NULL) { | |
423 | DBG("No suitable machine found !\n"); | |
424 | for (;;); | |
425 | } | |
426 | ppc_md = **mach; | |
427 | ||
428 | /* our udbg callbacks got overriden by the above, let's put them | |
429 | * back in. Ultimately, I want those things to be split from the | |
430 | * main ppc_md | |
431 | */ | |
432 | EARLY_DEBUG_INIT(); | |
433 | ||
434 | DBG("Found, Initializing memory management...\n"); | |
435 | ||
436 | /* | |
437 | * Initialize stab / SLB management | |
438 | */ | |
439 | stab_initialize(lpaca->stab_real); | |
440 | ||
441 | /* | |
442 | * Initialize the MMU Hash table and create the linear mapping | |
443 | * of memory | |
444 | */ | |
445 | htab_initialize(); | |
446 | ||
447 | DBG(" <- early_setup()\n"); | |
448 | } | |
449 | ||
450 | ||
451 | /* | |
452 | * Initialize some remaining members of the ppc64_caches and systemcfg structures | |
453 | * (at least until we get rid of them completely). This is mostly some | |
454 | * cache informations about the CPU that will be used by cache flush | |
455 | * routines and/or provided to userland | |
456 | */ | |
457 | static void __init initialize_cache_info(void) | |
458 | { | |
459 | struct device_node *np; | |
460 | unsigned long num_cpus = 0; | |
461 | ||
462 | DBG(" -> initialize_cache_info()\n"); | |
463 | ||
464 | for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { | |
465 | num_cpus += 1; | |
466 | ||
467 | /* We're assuming *all* of the CPUs have the same | |
468 | * d-cache and i-cache sizes... -Peter | |
469 | */ | |
470 | ||
471 | if ( num_cpus == 1 ) { | |
472 | u32 *sizep, *lsizep; | |
473 | u32 size, lsize; | |
474 | const char *dc, *ic; | |
475 | ||
476 | /* Then read cache informations */ | |
477 | if (systemcfg->platform == PLATFORM_POWERMAC) { | |
478 | dc = "d-cache-block-size"; | |
479 | ic = "i-cache-block-size"; | |
480 | } else { | |
481 | dc = "d-cache-line-size"; | |
482 | ic = "i-cache-line-size"; | |
483 | } | |
484 | ||
485 | size = 0; | |
486 | lsize = cur_cpu_spec->dcache_bsize; | |
487 | sizep = (u32 *)get_property(np, "d-cache-size", NULL); | |
488 | if (sizep != NULL) | |
489 | size = *sizep; | |
490 | lsizep = (u32 *) get_property(np, dc, NULL); | |
491 | if (lsizep != NULL) | |
492 | lsize = *lsizep; | |
493 | if (sizep == 0 || lsizep == 0) | |
494 | DBG("Argh, can't find dcache properties ! " | |
495 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
496 | ||
497 | systemcfg->dcache_size = ppc64_caches.dsize = size; | |
498 | systemcfg->dcache_line_size = | |
499 | ppc64_caches.dline_size = lsize; | |
500 | ppc64_caches.log_dline_size = __ilog2(lsize); | |
501 | ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; | |
502 | ||
503 | size = 0; | |
504 | lsize = cur_cpu_spec->icache_bsize; | |
505 | sizep = (u32 *)get_property(np, "i-cache-size", NULL); | |
506 | if (sizep != NULL) | |
507 | size = *sizep; | |
508 | lsizep = (u32 *)get_property(np, ic, NULL); | |
509 | if (lsizep != NULL) | |
510 | lsize = *lsizep; | |
511 | if (sizep == 0 || lsizep == 0) | |
512 | DBG("Argh, can't find icache properties ! " | |
513 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
514 | ||
515 | systemcfg->icache_size = ppc64_caches.isize = size; | |
516 | systemcfg->icache_line_size = | |
517 | ppc64_caches.iline_size = lsize; | |
518 | ppc64_caches.log_iline_size = __ilog2(lsize); | |
519 | ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; | |
520 | } | |
521 | } | |
522 | ||
523 | /* Add an eye catcher and the systemcfg layout version number */ | |
524 | strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); | |
525 | systemcfg->version.major = SYSTEMCFG_MAJOR; | |
526 | systemcfg->version.minor = SYSTEMCFG_MINOR; | |
527 | systemcfg->processor = mfspr(SPRN_PVR); | |
528 | ||
529 | DBG(" <- initialize_cache_info()\n"); | |
530 | } | |
531 | ||
532 | static void __init check_for_initrd(void) | |
533 | { | |
534 | #ifdef CONFIG_BLK_DEV_INITRD | |
535 | u64 *prop; | |
536 | ||
537 | DBG(" -> check_for_initrd()\n"); | |
538 | ||
539 | prop = (u64 *)get_property(of_chosen, "linux,initrd-start", NULL); | |
540 | if (prop != NULL) { | |
541 | initrd_start = (unsigned long)__va(*prop); | |
542 | prop = (u64 *)get_property(of_chosen, "linux,initrd-end", NULL); | |
543 | if (prop != NULL) { | |
544 | initrd_end = (unsigned long)__va(*prop); | |
545 | initrd_below_start_ok = 1; | |
546 | } else | |
547 | initrd_start = 0; | |
548 | } | |
549 | ||
550 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
551 | * look sensible. If not, clear initrd reference. | |
552 | */ | |
553 | if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE && | |
554 | initrd_end > initrd_start) | |
555 | ROOT_DEV = Root_RAM0; | |
556 | else | |
557 | initrd_start = initrd_end = 0; | |
558 | ||
559 | if (initrd_start) | |
560 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
561 | ||
562 | DBG(" <- check_for_initrd()\n"); | |
563 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
564 | } | |
565 | ||
566 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
567 | ||
568 | /* | |
569 | * Do some initial setup of the system. The parameters are those which | |
570 | * were passed in from the bootloader. | |
571 | */ | |
572 | void __init setup_system(void) | |
573 | { | |
574 | DBG(" -> setup_system()\n"); | |
575 | ||
576 | #ifdef CONFIG_PPC_ISERIES | |
577 | /* pSeries systems are identified in prom.c via OF. */ | |
578 | if (itLpNaca.xLparInstalled == 1) | |
579 | systemcfg->platform = PLATFORM_ISERIES_LPAR; | |
580 | ||
581 | ppc_md.init_early(); | |
582 | #else /* CONFIG_PPC_ISERIES */ | |
583 | ||
584 | /* | |
585 | * Unflatten the device-tree passed by prom_init or kexec | |
586 | */ | |
587 | unflatten_device_tree(); | |
588 | ||
589 | /* | |
590 | * Fill the ppc64_caches & systemcfg structures with informations | |
591 | * retreived from the device-tree. Need to be called before | |
592 | * finish_device_tree() since the later requires some of the | |
593 | * informations filled up here to properly parse the interrupt | |
594 | * tree. | |
595 | * It also sets up the cache line sizes which allows to call | |
596 | * routines like flush_icache_range (used by the hash init | |
597 | * later on). | |
598 | */ | |
599 | initialize_cache_info(); | |
600 | ||
601 | #ifdef CONFIG_PPC_RTAS | |
602 | /* | |
603 | * Initialize RTAS if available | |
604 | */ | |
605 | rtas_initialize(); | |
606 | #endif /* CONFIG_PPC_RTAS */ | |
607 | ||
608 | /* | |
609 | * Check if we have an initrd provided via the device-tree | |
610 | */ | |
611 | check_for_initrd(); | |
612 | ||
613 | /* | |
614 | * Do some platform specific early initializations, that includes | |
615 | * setting up the hash table pointers. It also sets up some interrupt-mapping | |
616 | * related options that will be used by finish_device_tree() | |
617 | */ | |
618 | ppc_md.init_early(); | |
619 | ||
620 | /* | |
621 | * "Finish" the device-tree, that is do the actual parsing of | |
622 | * some of the properties like the interrupt map | |
623 | */ | |
624 | finish_device_tree(); | |
625 | ||
626 | /* | |
627 | * Initialize xmon | |
628 | */ | |
629 | #ifdef CONFIG_XMON_DEFAULT | |
630 | xmon_init(); | |
631 | #endif | |
632 | /* | |
633 | * Register early console | |
634 | */ | |
635 | early_console_initialized = 1; | |
636 | register_console(&udbg_console); | |
637 | ||
638 | /* Save unparsed command line copy for /proc/cmdline */ | |
639 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
640 | ||
641 | parse_early_param(); | |
642 | #endif /* !CONFIG_PPC_ISERIES */ | |
643 | ||
644 | #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) | |
645 | /* | |
646 | * iSeries has already initialized the cpu maps at this point. | |
647 | */ | |
648 | setup_cpu_maps(); | |
649 | ||
650 | /* Release secondary cpus out of their spinloops at 0x60 now that | |
651 | * we can map physical -> logical CPU ids | |
652 | */ | |
653 | smp_release_cpus(); | |
654 | #endif /* defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) */ | |
655 | ||
656 | printk("Starting Linux PPC64 %s\n", UTS_RELEASE); | |
657 | ||
658 | printk("-----------------------------------------------------\n"); | |
659 | printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); | |
660 | printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); | |
661 | printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); | |
662 | printk("systemcfg = 0x%p\n", systemcfg); | |
663 | printk("systemcfg->platform = 0x%x\n", systemcfg->platform); | |
664 | printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); | |
665 | printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); | |
666 | printk("ppc64_caches.dcache_line_size = 0x%x\n", | |
667 | ppc64_caches.dline_size); | |
668 | printk("ppc64_caches.icache_line_size = 0x%x\n", | |
669 | ppc64_caches.iline_size); | |
670 | printk("htab_address = 0x%p\n", htab_address); | |
671 | printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); | |
672 | printk("-----------------------------------------------------\n"); | |
673 | ||
674 | mm_init_ppc64(); | |
675 | ||
676 | DBG(" <- setup_system()\n"); | |
677 | } | |
678 | ||
fce0d574 S |
679 | /* also used by kexec */ |
680 | void machine_shutdown(void) | |
1da177e4 LT |
681 | { |
682 | if (ppc_md.nvram_sync) | |
683 | ppc_md.nvram_sync(); | |
fce0d574 S |
684 | } |
685 | ||
686 | void machine_restart(char *cmd) | |
687 | { | |
688 | machine_shutdown(); | |
1da177e4 | 689 | ppc_md.restart(cmd); |
d7152fe1 DG |
690 | #ifdef CONFIG_SMP |
691 | smp_send_stop(); | |
692 | #endif | |
693 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
694 | local_irq_disable(); | |
695 | while (1) ; | |
1da177e4 | 696 | } |
fce0d574 | 697 | |
1da177e4 LT |
698 | void machine_power_off(void) |
699 | { | |
fce0d574 | 700 | machine_shutdown(); |
1da177e4 | 701 | ppc_md.power_off(); |
d7152fe1 DG |
702 | #ifdef CONFIG_SMP |
703 | smp_send_stop(); | |
704 | #endif | |
705 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
706 | local_irq_disable(); | |
707 | while (1) ; | |
1da177e4 | 708 | } |
fce0d574 | 709 | |
1da177e4 LT |
710 | void machine_halt(void) |
711 | { | |
fce0d574 | 712 | machine_shutdown(); |
1da177e4 | 713 | ppc_md.halt(); |
d7152fe1 DG |
714 | #ifdef CONFIG_SMP |
715 | smp_send_stop(); | |
716 | #endif | |
717 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
718 | local_irq_disable(); | |
719 | while (1) ; | |
1da177e4 | 720 | } |
1da177e4 | 721 | |
1da177e4 LT |
722 | static int ppc64_panic_event(struct notifier_block *this, |
723 | unsigned long event, void *ptr) | |
724 | { | |
725 | ppc_md.panic((char *)ptr); /* May not return */ | |
726 | return NOTIFY_DONE; | |
727 | } | |
728 | ||
729 | ||
730 | #ifdef CONFIG_SMP | |
731 | DEFINE_PER_CPU(unsigned int, pvr); | |
732 | #endif | |
733 | ||
734 | static int show_cpuinfo(struct seq_file *m, void *v) | |
735 | { | |
736 | unsigned long cpu_id = (unsigned long)v - 1; | |
737 | unsigned int pvr; | |
738 | unsigned short maj; | |
739 | unsigned short min; | |
740 | ||
741 | if (cpu_id == NR_CPUS) { | |
742 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
743 | ||
744 | if (ppc_md.get_cpuinfo != NULL) | |
745 | ppc_md.get_cpuinfo(m); | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
750 | /* We only show online cpus: disable preempt (overzealous, I | |
751 | * knew) to prevent cpu going down. */ | |
752 | preempt_disable(); | |
753 | if (!cpu_online(cpu_id)) { | |
754 | preempt_enable(); | |
755 | return 0; | |
756 | } | |
757 | ||
758 | #ifdef CONFIG_SMP | |
759 | pvr = per_cpu(pvr, cpu_id); | |
760 | #else | |
761 | pvr = mfspr(SPRN_PVR); | |
762 | #endif | |
763 | maj = (pvr >> 8) & 0xFF; | |
764 | min = pvr & 0xFF; | |
765 | ||
766 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
767 | seq_printf(m, "cpu\t\t: "); | |
768 | ||
769 | if (cur_cpu_spec->pvr_mask) | |
770 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
771 | else | |
772 | seq_printf(m, "unknown (%08x)", pvr); | |
773 | ||
774 | #ifdef CONFIG_ALTIVEC | |
775 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
776 | seq_printf(m, ", altivec supported"); | |
777 | #endif /* CONFIG_ALTIVEC */ | |
778 | ||
779 | seq_printf(m, "\n"); | |
780 | ||
781 | /* | |
782 | * Assume here that all clock rates are the same in a | |
783 | * smp system. -- Cort | |
784 | */ | |
785 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000, | |
786 | ppc_proc_freq % 1000000); | |
787 | ||
788 | seq_printf(m, "revision\t: %hd.%hd\n\n", maj, min); | |
789 | ||
790 | preempt_enable(); | |
791 | return 0; | |
792 | } | |
793 | ||
794 | static void *c_start(struct seq_file *m, loff_t *pos) | |
795 | { | |
796 | return *pos <= NR_CPUS ? (void *)((*pos)+1) : NULL; | |
797 | } | |
798 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
799 | { | |
800 | ++*pos; | |
801 | return c_start(m, pos); | |
802 | } | |
803 | static void c_stop(struct seq_file *m, void *v) | |
804 | { | |
805 | } | |
806 | struct seq_operations cpuinfo_op = { | |
807 | .start =c_start, | |
808 | .next = c_next, | |
809 | .stop = c_stop, | |
810 | .show = show_cpuinfo, | |
811 | }; | |
812 | ||
813 | /* | |
814 | * These three variables are used to save values passed to us by prom_init() | |
815 | * via the device tree. The TCE variables are needed because with a memory_limit | |
816 | * in force we may need to explicitly map the TCE are at the top of RAM. | |
817 | */ | |
818 | unsigned long memory_limit; | |
819 | unsigned long tce_alloc_start; | |
820 | unsigned long tce_alloc_end; | |
821 | ||
822 | #ifdef CONFIG_PPC_ISERIES | |
823 | /* | |
824 | * On iSeries we just parse the mem=X option from the command line. | |
825 | * On pSeries it's a bit more complicated, see prom_init_mem() | |
826 | */ | |
827 | static int __init early_parsemem(char *p) | |
828 | { | |
829 | if (!p) | |
830 | return 0; | |
831 | ||
832 | memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE); | |
833 | ||
834 | return 0; | |
835 | } | |
836 | early_param("mem", early_parsemem); | |
837 | #endif /* CONFIG_PPC_ISERIES */ | |
838 | ||
839 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
840 | static int __init set_preferred_console(void) | |
841 | { | |
842 | struct device_node *prom_stdout = NULL; | |
843 | char *name; | |
844 | u32 *spd; | |
845 | int offset = 0; | |
846 | ||
847 | DBG(" -> set_preferred_console()\n"); | |
848 | ||
849 | /* The user has requested a console so this is already set up. */ | |
850 | if (strstr(saved_command_line, "console=")) { | |
851 | DBG(" console was specified !\n"); | |
852 | return -EBUSY; | |
853 | } | |
854 | ||
855 | if (!of_chosen) { | |
856 | DBG(" of_chosen is NULL !\n"); | |
857 | return -ENODEV; | |
858 | } | |
859 | /* We are getting a weird phandle from OF ... */ | |
860 | /* ... So use the full path instead */ | |
861 | name = (char *)get_property(of_chosen, "linux,stdout-path", NULL); | |
862 | if (name == NULL) { | |
863 | DBG(" no linux,stdout-path !\n"); | |
864 | return -ENODEV; | |
865 | } | |
866 | prom_stdout = of_find_node_by_path(name); | |
867 | if (!prom_stdout) { | |
868 | DBG(" can't find stdout package %s !\n", name); | |
869 | return -ENODEV; | |
870 | } | |
871 | DBG("stdout is %s\n", prom_stdout->full_name); | |
872 | ||
873 | name = (char *)get_property(prom_stdout, "name", NULL); | |
874 | if (!name) { | |
875 | DBG(" stdout package has no name !\n"); | |
876 | goto not_found; | |
877 | } | |
878 | spd = (u32 *)get_property(prom_stdout, "current-speed", NULL); | |
879 | ||
880 | if (0) | |
881 | ; | |
882 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
883 | else if (strcmp(name, "serial") == 0) { | |
884 | int i; | |
885 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i); | |
886 | if (i > 8) { | |
887 | switch (reg[1]) { | |
888 | case 0x3f8: | |
889 | offset = 0; | |
890 | break; | |
891 | case 0x2f8: | |
892 | offset = 1; | |
893 | break; | |
894 | case 0x898: | |
895 | offset = 2; | |
896 | break; | |
897 | case 0x890: | |
898 | offset = 3; | |
899 | break; | |
900 | default: | |
901 | /* We dont recognise the serial port */ | |
902 | goto not_found; | |
903 | } | |
904 | } | |
905 | } | |
906 | #endif /* CONFIG_SERIAL_8250_CONSOLE */ | |
907 | #ifdef CONFIG_PPC_PSERIES | |
908 | else if (strcmp(name, "vty") == 0) { | |
909 | u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL); | |
910 | char *compat = (char *)get_property(prom_stdout, "compatible", NULL); | |
911 | ||
912 | if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) { | |
913 | /* Host Virtual Serial Interface */ | |
914 | int offset; | |
915 | switch (reg[0]) { | |
916 | case 0x30000000: | |
917 | offset = 0; | |
918 | break; | |
919 | case 0x30000001: | |
920 | offset = 1; | |
921 | break; | |
922 | default: | |
923 | goto not_found; | |
924 | } | |
925 | of_node_put(prom_stdout); | |
926 | DBG("Found hvsi console at offset %d\n", offset); | |
927 | return add_preferred_console("hvsi", offset, NULL); | |
928 | } else { | |
929 | /* pSeries LPAR virtual console */ | |
930 | of_node_put(prom_stdout); | |
931 | DBG("Found hvc console\n"); | |
932 | return add_preferred_console("hvc", 0, NULL); | |
933 | } | |
934 | } | |
935 | #endif /* CONFIG_PPC_PSERIES */ | |
936 | #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE | |
937 | else if (strcmp(name, "ch-a") == 0) | |
938 | offset = 0; | |
939 | else if (strcmp(name, "ch-b") == 0) | |
940 | offset = 1; | |
941 | #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ | |
942 | else | |
943 | goto not_found; | |
944 | of_node_put(prom_stdout); | |
945 | ||
946 | DBG("Found serial console at ttyS%d\n", offset); | |
947 | ||
948 | if (spd) { | |
949 | static char __initdata opt[16]; | |
950 | sprintf(opt, "%d", *spd); | |
951 | return add_preferred_console("ttyS", offset, opt); | |
952 | } else | |
953 | return add_preferred_console("ttyS", offset, NULL); | |
954 | ||
955 | not_found: | |
956 | DBG("No preferred console found !\n"); | |
957 | of_node_put(prom_stdout); | |
958 | return -ENODEV; | |
959 | } | |
960 | console_initcall(set_preferred_console); | |
961 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
962 | ||
963 | #ifdef CONFIG_IRQSTACKS | |
964 | static void __init irqstack_early_init(void) | |
965 | { | |
966 | unsigned int i; | |
967 | ||
968 | /* | |
969 | * interrupt stacks must be under 256MB, we cannot afford to take | |
970 | * SLB misses on them. | |
971 | */ | |
972 | for_each_cpu(i) { | |
973 | softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, | |
974 | THREAD_SIZE, 0x10000000)); | |
975 | hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE, | |
976 | THREAD_SIZE, 0x10000000)); | |
977 | } | |
978 | } | |
979 | #else | |
980 | #define irqstack_early_init() | |
981 | #endif | |
982 | ||
983 | /* | |
984 | * Stack space used when we detect a bad kernel stack pointer, and | |
985 | * early in SMP boots before relocation is enabled. | |
986 | */ | |
987 | static void __init emergency_stack_init(void) | |
988 | { | |
989 | unsigned long limit; | |
990 | unsigned int i; | |
991 | ||
992 | /* | |
993 | * Emergency stacks must be under 256MB, we cannot afford to take | |
994 | * SLB misses on them. The ABI also requires them to be 128-byte | |
995 | * aligned. | |
996 | * | |
997 | * Since we use these as temporary stacks during secondary CPU | |
998 | * bringup, we need to get at them in real mode. This means they | |
999 | * must also be within the RMO region. | |
1000 | */ | |
1001 | limit = min(0x10000000UL, lmb.rmo_size); | |
1002 | ||
1003 | for_each_cpu(i) | |
1004 | paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128, | |
1005 | limit)) + PAGE_SIZE; | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Called from setup_arch to initialize the bitmap of available | |
1010 | * syscalls in the systemcfg page | |
1011 | */ | |
1012 | void __init setup_syscall_map(void) | |
1013 | { | |
1014 | unsigned int i, count64 = 0, count32 = 0; | |
1015 | extern unsigned long *sys_call_table; | |
1016 | extern unsigned long *sys_call_table32; | |
1017 | extern unsigned long sys_ni_syscall; | |
1018 | ||
1019 | ||
1020 | for (i = 0; i < __NR_syscalls; i++) { | |
1021 | if (sys_call_table[i] == sys_ni_syscall) | |
1022 | continue; | |
1023 | count64++; | |
1024 | systemcfg->syscall_map_64[i >> 5] |= 0x80000000UL >> (i & 0x1f); | |
1025 | } | |
1026 | for (i = 0; i < __NR_syscalls; i++) { | |
1027 | if (sys_call_table32[i] == sys_ni_syscall) | |
1028 | continue; | |
1029 | count32++; | |
1030 | systemcfg->syscall_map_32[i >> 5] |= 0x80000000UL >> (i & 0x1f); | |
1031 | } | |
1032 | printk(KERN_INFO "Syscall map setup, %d 32 bits and %d 64 bits syscalls\n", | |
1033 | count32, count64); | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Called into from start_kernel, after lock_kernel has been called. | |
1038 | * Initializes bootmem, which is unsed to manage page allocation until | |
1039 | * mem_init is called. | |
1040 | */ | |
1041 | void __init setup_arch(char **cmdline_p) | |
1042 | { | |
1043 | extern void do_init_bootmem(void); | |
1044 | ||
1045 | ppc64_boot_msg(0x12, "Setup Arch"); | |
1046 | ||
1047 | *cmdline_p = cmd_line; | |
1048 | ||
1049 | /* | |
1050 | * Set cache line size based on type of cpu as a default. | |
1051 | * Systems with OF can look in the properties on the cpu node(s) | |
1052 | * for a possibly more accurate value. | |
1053 | */ | |
1054 | dcache_bsize = ppc64_caches.dline_size; | |
1055 | icache_bsize = ppc64_caches.iline_size; | |
1056 | ||
1057 | /* reboot on panic */ | |
1058 | panic_timeout = 180; | |
1059 | ||
1060 | if (ppc_md.panic) | |
1061 | notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); | |
1062 | ||
1063 | init_mm.start_code = PAGE_OFFSET; | |
1064 | init_mm.end_code = (unsigned long) _etext; | |
1065 | init_mm.end_data = (unsigned long) _edata; | |
1066 | init_mm.brk = klimit; | |
1067 | ||
1068 | irqstack_early_init(); | |
1069 | emergency_stack_init(); | |
1070 | ||
1071 | /* set up the bootmem stuff with available memory */ | |
1072 | do_init_bootmem(); | |
145e6642 | 1073 | sparse_init(); |
1da177e4 LT |
1074 | |
1075 | /* initialize the syscall map in systemcfg */ | |
1076 | setup_syscall_map(); | |
1077 | ||
1078 | ppc_md.setup_arch(); | |
1079 | ||
fd899c0c | 1080 | /* Use the default idle loop if the platform hasn't provided one. */ |
b6bff397 | 1081 | if (NULL == ppc_md.idle_loop) { |
fd899c0c | 1082 | ppc_md.idle_loop = default_idle; |
b6bff397 ME |
1083 | printk(KERN_INFO "Using default idle loop\n"); |
1084 | } | |
1da177e4 LT |
1085 | |
1086 | paging_init(); | |
1087 | ppc64_boot_msg(0x15, "Setup Done"); | |
1088 | } | |
1089 | ||
1090 | ||
1091 | /* ToDo: do something useful if ppc_md is not yet setup. */ | |
1092 | #define PPC64_LINUX_FUNCTION 0x0f000000 | |
1093 | #define PPC64_IPL_MESSAGE 0xc0000000 | |
1094 | #define PPC64_TERM_MESSAGE 0xb0000000 | |
1095 | #define PPC64_ATTN_MESSAGE 0xa0000000 | |
1096 | #define PPC64_DUMP_MESSAGE 0xd0000000 | |
1097 | ||
1098 | static void ppc64_do_msg(unsigned int src, const char *msg) | |
1099 | { | |
1100 | if (ppc_md.progress) { | |
8f586b22 | 1101 | char buf[128]; |
1da177e4 | 1102 | |
8f586b22 | 1103 | sprintf(buf, "%08X\n", src); |
1da177e4 | 1104 | ppc_md.progress(buf, 0); |
8f586b22 | 1105 | snprintf(buf, 128, "%s", msg); |
1da177e4 LT |
1106 | ppc_md.progress(buf, 0); |
1107 | } | |
1108 | } | |
1109 | ||
1110 | /* Print a boot progress message. */ | |
1111 | void ppc64_boot_msg(unsigned int src, const char *msg) | |
1112 | { | |
1113 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); | |
1114 | printk("[boot]%04x %s\n", src, msg); | |
1115 | } | |
1116 | ||
1117 | /* Print a termination message (print only -- does not stop the kernel) */ | |
1118 | void ppc64_terminate_msg(unsigned int src, const char *msg) | |
1119 | { | |
1120 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); | |
1121 | printk("[terminate]%04x %s\n", src, msg); | |
1122 | } | |
1123 | ||
1124 | /* Print something that needs attention (device error, etc) */ | |
1125 | void ppc64_attention_msg(unsigned int src, const char *msg) | |
1126 | { | |
1127 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_ATTN_MESSAGE|src, msg); | |
1128 | printk("[attention]%04x %s\n", src, msg); | |
1129 | } | |
1130 | ||
1131 | /* Print a dump progress message. */ | |
1132 | void ppc64_dump_msg(unsigned int src, const char *msg) | |
1133 | { | |
1134 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_DUMP_MESSAGE|src, msg); | |
1135 | printk("[dump]%04x %s\n", src, msg); | |
1136 | } | |
1137 | ||
1da177e4 | 1138 | /* This should only be called on processor 0 during calibrate decr */ |
10f7e7c1 | 1139 | void __init setup_default_decr(void) |
1da177e4 LT |
1140 | { |
1141 | struct paca_struct *lpaca = get_paca(); | |
1142 | ||
c4eb2a93 | 1143 | lpaca->default_decr = tb_ticks_per_jiffy; |
1da177e4 LT |
1144 | lpaca->next_jiffy_update_tb = get_tb() + tb_ticks_per_jiffy; |
1145 | } | |
1146 | ||
1da177e4 LT |
1147 | #ifndef CONFIG_PPC_ISERIES |
1148 | /* | |
1149 | * This function can be used by platforms to "find" legacy serial ports. | |
1150 | * It works for "serial" nodes under an "isa" node, and will try to | |
1151 | * respect the "ibm,aix-loc" property if any. It works with up to 8 | |
1152 | * ports. | |
1153 | */ | |
1154 | ||
1155 | #define MAX_LEGACY_SERIAL_PORTS 8 | |
1156 | static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; | |
1157 | static unsigned int old_serial_count; | |
1158 | ||
1159 | void __init generic_find_legacy_serial_ports(u64 *physport, | |
1160 | unsigned int *default_speed) | |
1161 | { | |
1162 | struct device_node *np; | |
1163 | u32 *sizeprop; | |
1164 | ||
1165 | struct isa_reg_property { | |
1166 | u32 space; | |
1167 | u32 address; | |
1168 | u32 size; | |
1169 | }; | |
1170 | struct pci_reg_property { | |
1171 | struct pci_address addr; | |
1172 | u32 size_hi; | |
1173 | u32 size_lo; | |
1174 | }; | |
1175 | ||
1176 | DBG(" -> generic_find_legacy_serial_port()\n"); | |
1177 | ||
1178 | *physport = 0; | |
1179 | if (default_speed) | |
1180 | *default_speed = 0; | |
1181 | ||
1182 | np = of_find_node_by_path("/"); | |
1183 | if (!np) | |
1184 | return; | |
1185 | ||
1186 | /* First fill our array */ | |
1187 | for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { | |
1188 | struct device_node *isa, *pci; | |
1189 | struct isa_reg_property *reg; | |
1190 | unsigned long phys_size, addr_size, io_base; | |
1191 | u32 *rangesp; | |
1192 | u32 *interrupts, *clk, *spd; | |
1193 | char *typep; | |
1194 | int index, rlen, rentsize; | |
1195 | ||
1196 | /* Ok, first check if it's under an "isa" parent */ | |
1197 | isa = of_get_parent(np); | |
1198 | if (!isa || strcmp(isa->name, "isa")) { | |
1199 | DBG("%s: no isa parent found\n", np->full_name); | |
1200 | continue; | |
1201 | } | |
1202 | ||
1203 | /* Now look for an "ibm,aix-loc" property that gives us ordering | |
1204 | * if any... | |
1205 | */ | |
1206 | typep = (char *)get_property(np, "ibm,aix-loc", NULL); | |
1207 | ||
1208 | /* Get the ISA port number */ | |
1209 | reg = (struct isa_reg_property *)get_property(np, "reg", NULL); | |
1210 | if (reg == NULL) | |
1211 | goto next_port; | |
1212 | /* We assume the interrupt number isn't translated ... */ | |
1213 | interrupts = (u32 *)get_property(np, "interrupts", NULL); | |
1214 | /* get clock freq. if present */ | |
1215 | clk = (u32 *)get_property(np, "clock-frequency", NULL); | |
1216 | /* get default speed if present */ | |
1217 | spd = (u32 *)get_property(np, "current-speed", NULL); | |
1218 | /* Default to locate at end of array */ | |
1219 | index = old_serial_count; /* end of the array by default */ | |
1220 | ||
1221 | /* If we have a location index, then use it */ | |
1222 | if (typep && *typep == 'S') { | |
1223 | index = simple_strtol(typep+1, NULL, 0) - 1; | |
1224 | /* if index is out of range, use end of array instead */ | |
1225 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
1226 | index = old_serial_count; | |
1227 | /* if our index is still out of range, that mean that | |
1228 | * array is full, we could scan for a free slot but that | |
1229 | * make little sense to bother, just skip the port | |
1230 | */ | |
1231 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
1232 | goto next_port; | |
1233 | if (index >= old_serial_count) | |
1234 | old_serial_count = index + 1; | |
1235 | /* Check if there is a port who already claimed our slot */ | |
1236 | if (serial_ports[index].iobase != 0) { | |
1237 | /* if we still have some room, move it, else override */ | |
1238 | if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { | |
1239 | DBG("Moved legacy port %d -> %d\n", index, | |
1240 | old_serial_count); | |
1241 | serial_ports[old_serial_count++] = | |
1242 | serial_ports[index]; | |
1243 | } else { | |
1244 | DBG("Replacing legacy port %d\n", index); | |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
1249 | goto next_port; | |
1250 | if (index >= old_serial_count) | |
1251 | old_serial_count = index + 1; | |
1252 | ||
1253 | /* Now fill the entry */ | |
1254 | memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); | |
1255 | serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; | |
1256 | serial_ports[index].iobase = reg->address; | |
1257 | serial_ports[index].irq = interrupts ? interrupts[0] : 0; | |
1258 | serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; | |
1259 | ||
1260 | DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", | |
1261 | index, | |
1262 | serial_ports[index].iobase, | |
1263 | serial_ports[index].irq, | |
1264 | serial_ports[index].uartclk); | |
1265 | ||
1266 | /* Get phys address of IO reg for port 1 */ | |
1267 | if (index != 0) | |
1268 | goto next_port; | |
1269 | ||
1270 | pci = of_get_parent(isa); | |
1271 | if (!pci) { | |
1272 | DBG("%s: no pci parent found\n", np->full_name); | |
1273 | goto next_port; | |
1274 | } | |
1275 | ||
1276 | rangesp = (u32 *)get_property(pci, "ranges", &rlen); | |
1277 | if (rangesp == NULL) { | |
1278 | of_node_put(pci); | |
1279 | goto next_port; | |
1280 | } | |
1281 | rlen /= 4; | |
1282 | ||
1283 | /* we need the #size-cells of the PCI bridge node itself */ | |
1284 | phys_size = 1; | |
1285 | sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); | |
1286 | if (sizeprop != NULL) | |
1287 | phys_size = *sizeprop; | |
1288 | /* we need the parent #addr-cells */ | |
1289 | addr_size = prom_n_addr_cells(pci); | |
1290 | rentsize = 3 + addr_size + phys_size; | |
1291 | io_base = 0; | |
1292 | for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { | |
1293 | if (((rangesp[0] >> 24) & 0x3) != 1) | |
1294 | continue; /* not IO space */ | |
1295 | io_base = rangesp[3]; | |
1296 | if (addr_size == 2) | |
1297 | io_base = (io_base << 32) | rangesp[4]; | |
1298 | } | |
1299 | if (io_base != 0) { | |
1300 | *physport = io_base + reg->address; | |
1301 | if (default_speed && spd) | |
1302 | *default_speed = *spd; | |
1303 | } | |
1304 | of_node_put(pci); | |
1305 | next_port: | |
1306 | of_node_put(isa); | |
1307 | } | |
1308 | ||
1309 | DBG(" <- generic_find_legacy_serial_port()\n"); | |
1310 | } | |
1311 | ||
1312 | static struct platform_device serial_device = { | |
1313 | .name = "serial8250", | |
1314 | .id = 0, | |
1315 | .dev = { | |
1316 | .platform_data = serial_ports, | |
1317 | }, | |
1318 | }; | |
1319 | ||
1320 | static int __init serial_dev_init(void) | |
1321 | { | |
1322 | return platform_device_register(&serial_device); | |
1323 | } | |
1324 | arch_initcall(serial_dev_init); | |
1325 | ||
1326 | #endif /* CONFIG_PPC_ISERIES */ | |
1327 | ||
1328 | int check_legacy_ioport(unsigned long base_port) | |
1329 | { | |
1330 | if (ppc_md.check_legacy_ioport == NULL) | |
1331 | return 0; | |
1332 | return ppc_md.check_legacy_ioport(base_port); | |
1333 | } | |
1334 | EXPORT_SYMBOL(check_legacy_ioport); | |
1335 | ||
1336 | #ifdef CONFIG_XMON | |
1337 | static int __init early_xmon(char *p) | |
1338 | { | |
1339 | /* ensure xmon is enabled */ | |
1340 | if (p) { | |
1341 | if (strncmp(p, "on", 2) == 0) | |
1342 | xmon_init(); | |
1343 | if (strncmp(p, "early", 5) != 0) | |
1344 | return 0; | |
1345 | } | |
1346 | xmon_init(); | |
1347 | debugger(NULL); | |
1348 | ||
1349 | return 0; | |
1350 | } | |
1351 | early_param("xmon", early_xmon); | |
1352 | #endif | |
1353 | ||
1354 | void cpu_die(void) | |
1355 | { | |
1356 | if (ppc_md.cpu_die) | |
1357 | ppc_md.cpu_die(); | |
1358 | } |