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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> | |
40ef8cbc PM |
44 | #include <asm/time.h> |
45 | #include <asm/cputable.h> | |
46 | #include <asm/sections.h> | |
47 | #include <asm/btext.h> | |
48 | #include <asm/nvram.h> | |
49 | #include <asm/setup.h> | |
50 | #include <asm/system.h> | |
51 | #include <asm/rtas.h> | |
52 | #include <asm/iommu.h> | |
53 | #include <asm/serial.h> | |
54 | #include <asm/cache.h> | |
55 | #include <asm/page.h> | |
56 | #include <asm/mmu.h> | |
57 | #include <asm/lmb.h> | |
f218aab5 | 58 | #include <asm/iseries/it_lp_naca.h> |
40ef8cbc PM |
59 | #include <asm/firmware.h> |
60 | #include <asm/systemcfg.h> | |
f78541dc | 61 | #include <asm/xmon.h> |
dcad47fc | 62 | #include <asm/udbg.h> |
40ef8cbc PM |
63 | |
64 | #ifdef DEBUG | |
65 | #define DBG(fmt...) udbg_printf(fmt) | |
66 | #else | |
67 | #define DBG(fmt...) | |
68 | #endif | |
69 | ||
70 | /* | |
71 | * Here are some early debugging facilities. You can enable one | |
72 | * but your kernel will not boot on anything else if you do so | |
73 | */ | |
74 | ||
75 | /* This one is for use on LPAR machines that support an HVC console | |
76 | * on vterm 0 | |
77 | */ | |
78 | extern void udbg_init_debug_lpar(void); | |
79 | /* This one is for use on Apple G5 machines | |
80 | */ | |
81 | extern void udbg_init_pmac_realmode(void); | |
82 | /* That's RTAS panel debug */ | |
83 | extern void call_rtas_display_status_delay(unsigned char c); | |
84 | /* Here's maple real mode debug */ | |
85 | extern void udbg_init_maple_realmode(void); | |
86 | ||
87 | #define EARLY_DEBUG_INIT() do {} while(0) | |
88 | ||
89 | #if 0 | |
90 | #define EARLY_DEBUG_INIT() udbg_init_debug_lpar() | |
91 | #define EARLY_DEBUG_INIT() udbg_init_maple_realmode() | |
92 | #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() | |
93 | #define EARLY_DEBUG_INIT() \ | |
94 | do { udbg_putc = call_rtas_display_status_delay; } while(0) | |
95 | #endif | |
96 | ||
97 | /* extern void *stab; */ | |
98 | extern unsigned long klimit; | |
99 | ||
100 | extern void mm_init_ppc64(void); | |
101 | extern void stab_initialize(unsigned long stab); | |
102 | extern void htab_initialize(void); | |
103 | extern void early_init_devtree(void *flat_dt); | |
104 | extern void unflatten_device_tree(void); | |
105 | ||
40ef8cbc PM |
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 | ||
112 | struct ppc64_caches ppc64_caches; | |
113 | EXPORT_SYMBOL_GPL(ppc64_caches); | |
114 | ||
115 | /* | |
116 | * These are used in binfmt_elf.c to put aux entries on the stack | |
117 | * for each elf executable being started. | |
118 | */ | |
119 | int dcache_bsize; | |
120 | int icache_bsize; | |
121 | int ucache_bsize; | |
122 | ||
123 | /* The main machine-dep calls structure | |
124 | */ | |
125 | struct machdep_calls ppc_md; | |
126 | EXPORT_SYMBOL(ppc_md); | |
127 | ||
128 | #ifdef CONFIG_MAGIC_SYSRQ | |
129 | unsigned long SYSRQ_KEY; | |
130 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
131 | ||
132 | ||
133 | static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); | |
134 | static struct notifier_block ppc64_panic_block = { | |
135 | .notifier_call = ppc64_panic_event, | |
136 | .priority = INT_MIN /* may not return; must be done last */ | |
137 | }; | |
138 | ||
40ef8cbc PM |
139 | #ifdef CONFIG_SMP |
140 | ||
141 | static int smt_enabled_cmdline; | |
142 | ||
143 | /* Look for ibm,smt-enabled OF option */ | |
144 | static void check_smt_enabled(void) | |
145 | { | |
146 | struct device_node *dn; | |
147 | char *smt_option; | |
148 | ||
149 | /* Allow the command line to overrule the OF option */ | |
150 | if (smt_enabled_cmdline) | |
151 | return; | |
152 | ||
153 | dn = of_find_node_by_path("/options"); | |
154 | ||
155 | if (dn) { | |
156 | smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); | |
157 | ||
158 | if (smt_option) { | |
159 | if (!strcmp(smt_option, "on")) | |
160 | smt_enabled_at_boot = 1; | |
161 | else if (!strcmp(smt_option, "off")) | |
162 | smt_enabled_at_boot = 0; | |
163 | } | |
164 | } | |
165 | } | |
166 | ||
167 | /* Look for smt-enabled= cmdline option */ | |
168 | static int __init early_smt_enabled(char *p) | |
169 | { | |
170 | smt_enabled_cmdline = 1; | |
171 | ||
172 | if (!p) | |
173 | return 0; | |
174 | ||
175 | if (!strcmp(p, "on") || !strcmp(p, "1")) | |
176 | smt_enabled_at_boot = 1; | |
177 | else if (!strcmp(p, "off") || !strcmp(p, "0")) | |
178 | smt_enabled_at_boot = 0; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | early_param("smt-enabled", early_smt_enabled); | |
183 | ||
5ad57078 PM |
184 | #else |
185 | #define check_smt_enabled() | |
40ef8cbc PM |
186 | #endif /* CONFIG_SMP */ |
187 | ||
188 | extern struct machdep_calls pSeries_md; | |
189 | extern struct machdep_calls pmac_md; | |
190 | extern struct machdep_calls maple_md; | |
f3f66f59 | 191 | extern struct machdep_calls cell_md; |
40ef8cbc PM |
192 | extern struct machdep_calls iseries_md; |
193 | ||
194 | /* Ultimately, stuff them in an elf section like initcalls... */ | |
195 | static struct machdep_calls __initdata *machines[] = { | |
196 | #ifdef CONFIG_PPC_PSERIES | |
197 | &pSeries_md, | |
198 | #endif /* CONFIG_PPC_PSERIES */ | |
199 | #ifdef CONFIG_PPC_PMAC | |
200 | &pmac_md, | |
201 | #endif /* CONFIG_PPC_PMAC */ | |
202 | #ifdef CONFIG_PPC_MAPLE | |
203 | &maple_md, | |
204 | #endif /* CONFIG_PPC_MAPLE */ | |
f3f66f59 AB |
205 | #ifdef CONFIG_PPC_CELL |
206 | &cell_md, | |
40ef8cbc PM |
207 | #endif |
208 | #ifdef CONFIG_PPC_ISERIES | |
209 | &iseries_md, | |
210 | #endif | |
211 | NULL | |
212 | }; | |
213 | ||
214 | /* | |
215 | * Early initialization entry point. This is called by head.S | |
216 | * with MMU translation disabled. We rely on the "feature" of | |
217 | * the CPU that ignores the top 2 bits of the address in real | |
218 | * mode so we can access kernel globals normally provided we | |
219 | * only toy with things in the RMO region. From here, we do | |
220 | * some early parsing of the device-tree to setup out LMB | |
221 | * data structures, and allocate & initialize the hash table | |
222 | * and segment tables so we can start running with translation | |
223 | * enabled. | |
224 | * | |
225 | * It is this function which will call the probe() callback of | |
226 | * the various platform types and copy the matching one to the | |
227 | * global ppc_md structure. Your platform can eventually do | |
228 | * some very early initializations from the probe() routine, but | |
229 | * this is not recommended, be very careful as, for example, the | |
230 | * device-tree is not accessible via normal means at this point. | |
231 | */ | |
232 | ||
233 | void __init early_setup(unsigned long dt_ptr) | |
234 | { | |
235 | struct paca_struct *lpaca = get_paca(); | |
236 | static struct machdep_calls **mach; | |
237 | ||
238 | /* | |
239 | * Enable early debugging if any specified (see top of | |
240 | * this file) | |
241 | */ | |
242 | EARLY_DEBUG_INIT(); | |
243 | ||
244 | DBG(" -> early_setup()\n"); | |
245 | ||
40ef8cbc PM |
246 | /* |
247 | * Do early initializations using the flattened device | |
248 | * tree, like retreiving the physical memory map or | |
249 | * calculating/retreiving the hash table size | |
250 | */ | |
251 | early_init_devtree(__va(dt_ptr)); | |
252 | ||
253 | /* | |
254 | * Iterate all ppc_md structures until we find the proper | |
255 | * one for the current machine type | |
256 | */ | |
257 | DBG("Probing machine type for platform %x...\n", | |
258 | systemcfg->platform); | |
259 | ||
260 | for (mach = machines; *mach; mach++) { | |
261 | if ((*mach)->probe(systemcfg->platform)) | |
262 | break; | |
263 | } | |
264 | /* What can we do if we didn't find ? */ | |
265 | if (*mach == NULL) { | |
266 | DBG("No suitable machine found !\n"); | |
267 | for (;;); | |
268 | } | |
269 | ppc_md = **mach; | |
270 | ||
271 | DBG("Found, Initializing memory management...\n"); | |
272 | ||
273 | /* | |
3c726f8d BH |
274 | * Initialize the MMU Hash table and create the linear mapping |
275 | * of memory. Has to be done before stab/slb initialization as | |
276 | * this is currently where the page size encoding is obtained | |
40ef8cbc | 277 | */ |
3c726f8d | 278 | htab_initialize(); |
40ef8cbc PM |
279 | |
280 | /* | |
3c726f8d | 281 | * Initialize stab / SLB management except on iSeries |
40ef8cbc | 282 | */ |
3c726f8d BH |
283 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) { |
284 | if (cpu_has_feature(CPU_FTR_SLB)) | |
285 | slb_initialize(); | |
286 | else | |
287 | stab_initialize(lpaca->stab_real); | |
288 | } | |
40ef8cbc PM |
289 | |
290 | DBG(" <- early_setup()\n"); | |
291 | } | |
292 | ||
293 | ||
b8f51021 ME |
294 | #if defined(CONFIG_SMP) || defined(CONFIG_KEXEC) |
295 | void smp_release_cpus(void) | |
296 | { | |
297 | extern unsigned long __secondary_hold_spinloop; | |
298 | ||
299 | DBG(" -> smp_release_cpus()\n"); | |
300 | ||
301 | /* All secondary cpus are spinning on a common spinloop, release them | |
302 | * all now so they can start to spin on their individual paca | |
303 | * spinloops. For non SMP kernels, the secondary cpus never get out | |
304 | * of the common spinloop. | |
305 | * This is useless but harmless on iSeries, secondaries are already | |
306 | * waiting on their paca spinloops. */ | |
307 | ||
308 | __secondary_hold_spinloop = 1; | |
309 | mb(); | |
310 | ||
311 | DBG(" <- smp_release_cpus()\n"); | |
312 | } | |
5ad57078 PM |
313 | #else |
314 | #define smp_release_cpus() | |
b8f51021 ME |
315 | #endif /* CONFIG_SMP || CONFIG_KEXEC */ |
316 | ||
40ef8cbc PM |
317 | /* |
318 | * Initialize some remaining members of the ppc64_caches and systemcfg structures | |
319 | * (at least until we get rid of them completely). This is mostly some | |
320 | * cache informations about the CPU that will be used by cache flush | |
321 | * routines and/or provided to userland | |
322 | */ | |
323 | static void __init initialize_cache_info(void) | |
324 | { | |
325 | struct device_node *np; | |
326 | unsigned long num_cpus = 0; | |
327 | ||
328 | DBG(" -> initialize_cache_info()\n"); | |
329 | ||
330 | for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { | |
331 | num_cpus += 1; | |
332 | ||
333 | /* We're assuming *all* of the CPUs have the same | |
334 | * d-cache and i-cache sizes... -Peter | |
335 | */ | |
336 | ||
337 | if ( num_cpus == 1 ) { | |
338 | u32 *sizep, *lsizep; | |
339 | u32 size, lsize; | |
340 | const char *dc, *ic; | |
341 | ||
342 | /* Then read cache informations */ | |
343 | if (systemcfg->platform == PLATFORM_POWERMAC) { | |
344 | dc = "d-cache-block-size"; | |
345 | ic = "i-cache-block-size"; | |
346 | } else { | |
347 | dc = "d-cache-line-size"; | |
348 | ic = "i-cache-line-size"; | |
349 | } | |
350 | ||
351 | size = 0; | |
352 | lsize = cur_cpu_spec->dcache_bsize; | |
353 | sizep = (u32 *)get_property(np, "d-cache-size", NULL); | |
354 | if (sizep != NULL) | |
355 | size = *sizep; | |
356 | lsizep = (u32 *) get_property(np, dc, NULL); | |
357 | if (lsizep != NULL) | |
358 | lsize = *lsizep; | |
359 | if (sizep == 0 || lsizep == 0) | |
360 | DBG("Argh, can't find dcache properties ! " | |
361 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
362 | ||
363 | systemcfg->dcache_size = ppc64_caches.dsize = size; | |
364 | systemcfg->dcache_line_size = | |
365 | ppc64_caches.dline_size = lsize; | |
366 | ppc64_caches.log_dline_size = __ilog2(lsize); | |
367 | ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; | |
368 | ||
369 | size = 0; | |
370 | lsize = cur_cpu_spec->icache_bsize; | |
371 | sizep = (u32 *)get_property(np, "i-cache-size", NULL); | |
372 | if (sizep != NULL) | |
373 | size = *sizep; | |
374 | lsizep = (u32 *)get_property(np, ic, NULL); | |
375 | if (lsizep != NULL) | |
376 | lsize = *lsizep; | |
377 | if (sizep == 0 || lsizep == 0) | |
378 | DBG("Argh, can't find icache properties ! " | |
379 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
380 | ||
381 | systemcfg->icache_size = ppc64_caches.isize = size; | |
382 | systemcfg->icache_line_size = | |
383 | ppc64_caches.iline_size = lsize; | |
384 | ppc64_caches.log_iline_size = __ilog2(lsize); | |
385 | ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; | |
386 | } | |
387 | } | |
388 | ||
389 | /* Add an eye catcher and the systemcfg layout version number */ | |
390 | strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); | |
391 | systemcfg->version.major = SYSTEMCFG_MAJOR; | |
392 | systemcfg->version.minor = SYSTEMCFG_MINOR; | |
393 | systemcfg->processor = mfspr(SPRN_PVR); | |
394 | ||
395 | DBG(" <- initialize_cache_info()\n"); | |
396 | } | |
397 | ||
40ef8cbc PM |
398 | |
399 | /* | |
400 | * Do some initial setup of the system. The parameters are those which | |
401 | * were passed in from the bootloader. | |
402 | */ | |
403 | void __init setup_system(void) | |
404 | { | |
405 | DBG(" -> setup_system()\n"); | |
406 | ||
407 | /* | |
408 | * Unflatten the device-tree passed by prom_init or kexec | |
409 | */ | |
410 | unflatten_device_tree(); | |
411 | ||
412 | /* | |
413 | * Fill the ppc64_caches & systemcfg structures with informations | |
414 | * retreived from the device-tree. Need to be called before | |
415 | * finish_device_tree() since the later requires some of the | |
416 | * informations filled up here to properly parse the interrupt | |
417 | * tree. | |
418 | * It also sets up the cache line sizes which allows to call | |
419 | * routines like flush_icache_range (used by the hash init | |
420 | * later on). | |
421 | */ | |
422 | initialize_cache_info(); | |
423 | ||
424 | #ifdef CONFIG_PPC_RTAS | |
425 | /* | |
426 | * Initialize RTAS if available | |
427 | */ | |
428 | rtas_initialize(); | |
429 | #endif /* CONFIG_PPC_RTAS */ | |
40ef8cbc PM |
430 | |
431 | /* | |
432 | * Check if we have an initrd provided via the device-tree | |
433 | */ | |
434 | check_for_initrd(); | |
40ef8cbc PM |
435 | |
436 | /* | |
437 | * Do some platform specific early initializations, that includes | |
438 | * setting up the hash table pointers. It also sets up some interrupt-mapping | |
439 | * related options that will be used by finish_device_tree() | |
440 | */ | |
441 | ppc_md.init_early(); | |
40ef8cbc PM |
442 | |
443 | /* | |
444 | * "Finish" the device-tree, that is do the actual parsing of | |
445 | * some of the properties like the interrupt map | |
446 | */ | |
447 | finish_device_tree(); | |
40ef8cbc | 448 | |
0458060c PM |
449 | #ifdef CONFIG_BOOTX_TEXT |
450 | init_boot_display(); | |
451 | #endif | |
452 | ||
40ef8cbc PM |
453 | /* |
454 | * Initialize xmon | |
455 | */ | |
456 | #ifdef CONFIG_XMON_DEFAULT | |
457 | xmon_init(1); | |
458 | #endif | |
40ef8cbc PM |
459 | /* |
460 | * Register early console | |
461 | */ | |
462 | register_early_udbg_console(); | |
40ef8cbc PM |
463 | |
464 | /* Save unparsed command line copy for /proc/cmdline */ | |
465 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
466 | ||
467 | parse_early_param(); | |
40ef8cbc | 468 | |
5ad57078 PM |
469 | check_smt_enabled(); |
470 | smp_setup_cpu_maps(); | |
40ef8cbc PM |
471 | |
472 | /* Release secondary cpus out of their spinloops at 0x60 now that | |
473 | * we can map physical -> logical CPU ids | |
474 | */ | |
475 | smp_release_cpus(); | |
40ef8cbc PM |
476 | |
477 | printk("Starting Linux PPC64 %s\n", system_utsname.version); | |
478 | ||
479 | printk("-----------------------------------------------------\n"); | |
480 | printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); | |
40ef8cbc PM |
481 | printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); |
482 | printk("systemcfg = 0x%p\n", systemcfg); | |
483 | printk("systemcfg->platform = 0x%x\n", systemcfg->platform); | |
484 | printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); | |
485 | printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); | |
486 | printk("ppc64_caches.dcache_line_size = 0x%x\n", | |
487 | ppc64_caches.dline_size); | |
488 | printk("ppc64_caches.icache_line_size = 0x%x\n", | |
489 | ppc64_caches.iline_size); | |
490 | printk("htab_address = 0x%p\n", htab_address); | |
491 | printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); | |
492 | printk("-----------------------------------------------------\n"); | |
40ef8cbc PM |
493 | |
494 | mm_init_ppc64(); | |
40ef8cbc PM |
495 | |
496 | DBG(" <- setup_system()\n"); | |
497 | } | |
498 | ||
40ef8cbc PM |
499 | static int ppc64_panic_event(struct notifier_block *this, |
500 | unsigned long event, void *ptr) | |
501 | { | |
502 | ppc_md.panic((char *)ptr); /* May not return */ | |
503 | return NOTIFY_DONE; | |
504 | } | |
505 | ||
40ef8cbc PM |
506 | #ifdef CONFIG_IRQSTACKS |
507 | static void __init irqstack_early_init(void) | |
508 | { | |
509 | unsigned int i; | |
510 | ||
511 | /* | |
512 | * interrupt stacks must be under 256MB, we cannot afford to take | |
513 | * SLB misses on them. | |
514 | */ | |
515 | for_each_cpu(i) { | |
3c726f8d BH |
516 | softirq_ctx[i] = (struct thread_info *) |
517 | __va(lmb_alloc_base(THREAD_SIZE, | |
518 | THREAD_SIZE, 0x10000000)); | |
519 | hardirq_ctx[i] = (struct thread_info *) | |
520 | __va(lmb_alloc_base(THREAD_SIZE, | |
521 | THREAD_SIZE, 0x10000000)); | |
40ef8cbc PM |
522 | } |
523 | } | |
524 | #else | |
525 | #define irqstack_early_init() | |
526 | #endif | |
527 | ||
528 | /* | |
529 | * Stack space used when we detect a bad kernel stack pointer, and | |
530 | * early in SMP boots before relocation is enabled. | |
531 | */ | |
532 | static void __init emergency_stack_init(void) | |
533 | { | |
534 | unsigned long limit; | |
535 | unsigned int i; | |
536 | ||
537 | /* | |
538 | * Emergency stacks must be under 256MB, we cannot afford to take | |
539 | * SLB misses on them. The ABI also requires them to be 128-byte | |
540 | * aligned. | |
541 | * | |
542 | * Since we use these as temporary stacks during secondary CPU | |
543 | * bringup, we need to get at them in real mode. This means they | |
544 | * must also be within the RMO region. | |
545 | */ | |
546 | limit = min(0x10000000UL, lmb.rmo_size); | |
547 | ||
548 | for_each_cpu(i) | |
3c726f8d BH |
549 | paca[i].emergency_sp = |
550 | __va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE; | |
40ef8cbc PM |
551 | } |
552 | ||
553 | /* | |
554 | * Called from setup_arch to initialize the bitmap of available | |
555 | * syscalls in the systemcfg page | |
556 | */ | |
557 | void __init setup_syscall_map(void) | |
558 | { | |
559 | unsigned int i, count64 = 0, count32 = 0; | |
640768ee SR |
560 | extern unsigned long *sys_call_table; |
561 | extern unsigned long sys_ni_syscall; | |
562 | ||
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563 | |
564 | for (i = 0; i < __NR_syscalls; i++) { | |
640768ee | 565 | if (sys_call_table[i*2] != sys_ni_syscall) { |
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566 | count64++; |
567 | systemcfg->syscall_map_64[i >> 5] |= | |
568 | 0x80000000UL >> (i & 0x1f); | |
569 | } | |
640768ee | 570 | if (sys_call_table[i*2+1] != sys_ni_syscall) { |
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571 | count32++; |
572 | systemcfg->syscall_map_32[i >> 5] |= | |
573 | 0x80000000UL >> (i & 0x1f); | |
574 | } | |
575 | } | |
576 | printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", | |
577 | count32, count64); | |
578 | } | |
579 | ||
580 | /* | |
581 | * Called into from start_kernel, after lock_kernel has been called. | |
582 | * Initializes bootmem, which is unsed to manage page allocation until | |
583 | * mem_init is called. | |
584 | */ | |
585 | void __init setup_arch(char **cmdline_p) | |
586 | { | |
587 | extern void do_init_bootmem(void); | |
588 | ||
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589 | ppc64_boot_msg(0x12, "Setup Arch"); |
590 | ||
591 | *cmdline_p = cmd_line; | |
592 | ||
593 | /* | |
594 | * Set cache line size based on type of cpu as a default. | |
595 | * Systems with OF can look in the properties on the cpu node(s) | |
596 | * for a possibly more accurate value. | |
597 | */ | |
598 | dcache_bsize = ppc64_caches.dline_size; | |
599 | icache_bsize = ppc64_caches.iline_size; | |
600 | ||
601 | /* reboot on panic */ | |
602 | panic_timeout = 180; | |
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603 | |
604 | if (ppc_md.panic) | |
605 | notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); | |
606 | ||
607 | init_mm.start_code = PAGE_OFFSET; | |
608 | init_mm.end_code = (unsigned long) _etext; | |
609 | init_mm.end_data = (unsigned long) _edata; | |
610 | init_mm.brk = klimit; | |
611 | ||
612 | irqstack_early_init(); | |
613 | emergency_stack_init(); | |
614 | ||
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615 | stabs_alloc(); |
616 | ||
617 | /* set up the bootmem stuff with available memory */ | |
618 | do_init_bootmem(); | |
619 | sparse_init(); | |
620 | ||
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621 | /* initialize the syscall map in systemcfg */ |
622 | setup_syscall_map(); | |
623 | ||
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624 | #ifdef CONFIG_DUMMY_CONSOLE |
625 | conswitchp = &dummy_con; | |
626 | #endif | |
627 | ||
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628 | ppc_md.setup_arch(); |
629 | ||
630 | /* Use the default idle loop if the platform hasn't provided one. */ | |
631 | if (NULL == ppc_md.idle_loop) { | |
632 | ppc_md.idle_loop = default_idle; | |
633 | printk(KERN_INFO "Using default idle loop\n"); | |
634 | } | |
635 | ||
636 | paging_init(); | |
637 | ppc64_boot_msg(0x15, "Setup Done"); | |
638 | } | |
639 | ||
640 | ||
641 | /* ToDo: do something useful if ppc_md is not yet setup. */ | |
642 | #define PPC64_LINUX_FUNCTION 0x0f000000 | |
643 | #define PPC64_IPL_MESSAGE 0xc0000000 | |
644 | #define PPC64_TERM_MESSAGE 0xb0000000 | |
645 | ||
646 | static void ppc64_do_msg(unsigned int src, const char *msg) | |
647 | { | |
648 | if (ppc_md.progress) { | |
649 | char buf[128]; | |
650 | ||
651 | sprintf(buf, "%08X\n", src); | |
652 | ppc_md.progress(buf, 0); | |
653 | snprintf(buf, 128, "%s", msg); | |
654 | ppc_md.progress(buf, 0); | |
655 | } | |
656 | } | |
657 | ||
658 | /* Print a boot progress message. */ | |
659 | void ppc64_boot_msg(unsigned int src, const char *msg) | |
660 | { | |
661 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); | |
662 | printk("[boot]%04x %s\n", src, msg); | |
663 | } | |
664 | ||
665 | /* Print a termination message (print only -- does not stop the kernel) */ | |
666 | void ppc64_terminate_msg(unsigned int src, const char *msg) | |
667 | { | |
668 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); | |
669 | printk("[terminate]%04x %s\n", src, msg); | |
670 | } | |
671 | ||
40ef8cbc PM |
672 | #ifndef CONFIG_PPC_ISERIES |
673 | /* | |
674 | * This function can be used by platforms to "find" legacy serial ports. | |
675 | * It works for "serial" nodes under an "isa" node, and will try to | |
676 | * respect the "ibm,aix-loc" property if any. It works with up to 8 | |
677 | * ports. | |
678 | */ | |
679 | ||
680 | #define MAX_LEGACY_SERIAL_PORTS 8 | |
681 | static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; | |
682 | static unsigned int old_serial_count; | |
683 | ||
684 | void __init generic_find_legacy_serial_ports(u64 *physport, | |
685 | unsigned int *default_speed) | |
686 | { | |
687 | struct device_node *np; | |
688 | u32 *sizeprop; | |
689 | ||
690 | struct isa_reg_property { | |
691 | u32 space; | |
692 | u32 address; | |
693 | u32 size; | |
694 | }; | |
695 | struct pci_reg_property { | |
696 | struct pci_address addr; | |
697 | u32 size_hi; | |
698 | u32 size_lo; | |
699 | }; | |
700 | ||
701 | DBG(" -> generic_find_legacy_serial_port()\n"); | |
702 | ||
703 | *physport = 0; | |
704 | if (default_speed) | |
705 | *default_speed = 0; | |
706 | ||
707 | np = of_find_node_by_path("/"); | |
708 | if (!np) | |
709 | return; | |
710 | ||
711 | /* First fill our array */ | |
712 | for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { | |
713 | struct device_node *isa, *pci; | |
714 | struct isa_reg_property *reg; | |
715 | unsigned long phys_size, addr_size, io_base; | |
716 | u32 *rangesp; | |
717 | u32 *interrupts, *clk, *spd; | |
718 | char *typep; | |
719 | int index, rlen, rentsize; | |
720 | ||
721 | /* Ok, first check if it's under an "isa" parent */ | |
722 | isa = of_get_parent(np); | |
723 | if (!isa || strcmp(isa->name, "isa")) { | |
724 | DBG("%s: no isa parent found\n", np->full_name); | |
725 | continue; | |
726 | } | |
727 | ||
728 | /* Now look for an "ibm,aix-loc" property that gives us ordering | |
729 | * if any... | |
730 | */ | |
731 | typep = (char *)get_property(np, "ibm,aix-loc", NULL); | |
732 | ||
733 | /* Get the ISA port number */ | |
734 | reg = (struct isa_reg_property *)get_property(np, "reg", NULL); | |
735 | if (reg == NULL) | |
736 | goto next_port; | |
737 | /* We assume the interrupt number isn't translated ... */ | |
738 | interrupts = (u32 *)get_property(np, "interrupts", NULL); | |
739 | /* get clock freq. if present */ | |
740 | clk = (u32 *)get_property(np, "clock-frequency", NULL); | |
741 | /* get default speed if present */ | |
742 | spd = (u32 *)get_property(np, "current-speed", NULL); | |
743 | /* Default to locate at end of array */ | |
744 | index = old_serial_count; /* end of the array by default */ | |
745 | ||
746 | /* If we have a location index, then use it */ | |
747 | if (typep && *typep == 'S') { | |
748 | index = simple_strtol(typep+1, NULL, 0) - 1; | |
749 | /* if index is out of range, use end of array instead */ | |
750 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
751 | index = old_serial_count; | |
752 | /* if our index is still out of range, that mean that | |
753 | * array is full, we could scan for a free slot but that | |
754 | * make little sense to bother, just skip the port | |
755 | */ | |
756 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
757 | goto next_port; | |
758 | if (index >= old_serial_count) | |
759 | old_serial_count = index + 1; | |
760 | /* Check if there is a port who already claimed our slot */ | |
761 | if (serial_ports[index].iobase != 0) { | |
762 | /* if we still have some room, move it, else override */ | |
763 | if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { | |
764 | DBG("Moved legacy port %d -> %d\n", index, | |
765 | old_serial_count); | |
766 | serial_ports[old_serial_count++] = | |
767 | serial_ports[index]; | |
768 | } else { | |
769 | DBG("Replacing legacy port %d\n", index); | |
770 | } | |
771 | } | |
772 | } | |
773 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
774 | goto next_port; | |
775 | if (index >= old_serial_count) | |
776 | old_serial_count = index + 1; | |
777 | ||
778 | /* Now fill the entry */ | |
779 | memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); | |
780 | serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; | |
781 | serial_ports[index].iobase = reg->address; | |
782 | serial_ports[index].irq = interrupts ? interrupts[0] : 0; | |
783 | serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; | |
784 | ||
785 | DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", | |
786 | index, | |
787 | serial_ports[index].iobase, | |
788 | serial_ports[index].irq, | |
789 | serial_ports[index].uartclk); | |
790 | ||
791 | /* Get phys address of IO reg for port 1 */ | |
792 | if (index != 0) | |
793 | goto next_port; | |
794 | ||
795 | pci = of_get_parent(isa); | |
796 | if (!pci) { | |
797 | DBG("%s: no pci parent found\n", np->full_name); | |
798 | goto next_port; | |
799 | } | |
800 | ||
801 | rangesp = (u32 *)get_property(pci, "ranges", &rlen); | |
802 | if (rangesp == NULL) { | |
803 | of_node_put(pci); | |
804 | goto next_port; | |
805 | } | |
806 | rlen /= 4; | |
807 | ||
808 | /* we need the #size-cells of the PCI bridge node itself */ | |
809 | phys_size = 1; | |
810 | sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); | |
811 | if (sizeprop != NULL) | |
812 | phys_size = *sizeprop; | |
813 | /* we need the parent #addr-cells */ | |
814 | addr_size = prom_n_addr_cells(pci); | |
815 | rentsize = 3 + addr_size + phys_size; | |
816 | io_base = 0; | |
817 | for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { | |
818 | if (((rangesp[0] >> 24) & 0x3) != 1) | |
819 | continue; /* not IO space */ | |
820 | io_base = rangesp[3]; | |
821 | if (addr_size == 2) | |
822 | io_base = (io_base << 32) | rangesp[4]; | |
823 | } | |
824 | if (io_base != 0) { | |
825 | *physport = io_base + reg->address; | |
826 | if (default_speed && spd) | |
827 | *default_speed = *spd; | |
828 | } | |
829 | of_node_put(pci); | |
830 | next_port: | |
831 | of_node_put(isa); | |
832 | } | |
833 | ||
834 | DBG(" <- generic_find_legacy_serial_port()\n"); | |
835 | } | |
836 | ||
837 | static struct platform_device serial_device = { | |
838 | .name = "serial8250", | |
839 | .id = PLAT8250_DEV_PLATFORM, | |
840 | .dev = { | |
841 | .platform_data = serial_ports, | |
842 | }, | |
843 | }; | |
844 | ||
845 | static int __init serial_dev_init(void) | |
846 | { | |
847 | return platform_device_register(&serial_device); | |
848 | } | |
849 | arch_initcall(serial_dev_init); | |
850 | ||
851 | #endif /* CONFIG_PPC_ISERIES */ | |
852 | ||
853 | int check_legacy_ioport(unsigned long base_port) | |
854 | { | |
855 | if (ppc_md.check_legacy_ioport == NULL) | |
856 | return 0; | |
857 | return ppc_md.check_legacy_ioport(base_port); | |
858 | } | |
859 | EXPORT_SYMBOL(check_legacy_ioport); | |
860 | ||
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861 | void cpu_die(void) |
862 | { | |
863 | if (ppc_md.cpu_die) | |
864 | ppc_md.cpu_die(); | |
865 | } |