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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 | 63 | |
66ba135c SR |
64 | #include "setup.h" |
65 | ||
40ef8cbc PM |
66 | #ifdef DEBUG |
67 | #define DBG(fmt...) udbg_printf(fmt) | |
68 | #else | |
69 | #define DBG(fmt...) | |
70 | #endif | |
71 | ||
72 | /* | |
73 | * Here are some early debugging facilities. You can enable one | |
74 | * but your kernel will not boot on anything else if you do so | |
75 | */ | |
76 | ||
77 | /* This one is for use on LPAR machines that support an HVC console | |
78 | * on vterm 0 | |
79 | */ | |
80 | extern void udbg_init_debug_lpar(void); | |
81 | /* This one is for use on Apple G5 machines | |
82 | */ | |
83 | extern void udbg_init_pmac_realmode(void); | |
84 | /* That's RTAS panel debug */ | |
85 | extern void call_rtas_display_status_delay(unsigned char c); | |
86 | /* Here's maple real mode debug */ | |
87 | extern void udbg_init_maple_realmode(void); | |
88 | ||
89 | #define EARLY_DEBUG_INIT() do {} while(0) | |
90 | ||
91 | #if 0 | |
92 | #define EARLY_DEBUG_INIT() udbg_init_debug_lpar() | |
93 | #define EARLY_DEBUG_INIT() udbg_init_maple_realmode() | |
94 | #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode() | |
95 | #define EARLY_DEBUG_INIT() \ | |
96 | do { udbg_putc = call_rtas_display_status_delay; } while(0) | |
97 | #endif | |
98 | ||
99 | /* extern void *stab; */ | |
100 | extern unsigned long klimit; | |
101 | ||
102 | extern void mm_init_ppc64(void); | |
103 | extern void stab_initialize(unsigned long stab); | |
104 | extern void htab_initialize(void); | |
105 | extern void early_init_devtree(void *flat_dt); | |
106 | extern void unflatten_device_tree(void); | |
107 | ||
40ef8cbc PM |
108 | int have_of = 1; |
109 | int boot_cpuid = 0; | |
110 | int boot_cpuid_phys = 0; | |
111 | dev_t boot_dev; | |
112 | u64 ppc64_pft_size; | |
113 | ||
114 | struct ppc64_caches ppc64_caches; | |
115 | EXPORT_SYMBOL_GPL(ppc64_caches); | |
116 | ||
117 | /* | |
118 | * These are used in binfmt_elf.c to put aux entries on the stack | |
119 | * for each elf executable being started. | |
120 | */ | |
121 | int dcache_bsize; | |
122 | int icache_bsize; | |
123 | int ucache_bsize; | |
124 | ||
125 | /* The main machine-dep calls structure | |
126 | */ | |
127 | struct machdep_calls ppc_md; | |
128 | EXPORT_SYMBOL(ppc_md); | |
129 | ||
130 | #ifdef CONFIG_MAGIC_SYSRQ | |
131 | unsigned long SYSRQ_KEY; | |
132 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
133 | ||
134 | ||
135 | static int ppc64_panic_event(struct notifier_block *, unsigned long, void *); | |
136 | static struct notifier_block ppc64_panic_block = { | |
137 | .notifier_call = ppc64_panic_event, | |
138 | .priority = INT_MIN /* may not return; must be done last */ | |
139 | }; | |
140 | ||
40ef8cbc PM |
141 | #ifdef CONFIG_SMP |
142 | ||
143 | static int smt_enabled_cmdline; | |
144 | ||
145 | /* Look for ibm,smt-enabled OF option */ | |
146 | static void check_smt_enabled(void) | |
147 | { | |
148 | struct device_node *dn; | |
149 | char *smt_option; | |
150 | ||
151 | /* Allow the command line to overrule the OF option */ | |
152 | if (smt_enabled_cmdline) | |
153 | return; | |
154 | ||
155 | dn = of_find_node_by_path("/options"); | |
156 | ||
157 | if (dn) { | |
158 | smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL); | |
159 | ||
160 | if (smt_option) { | |
161 | if (!strcmp(smt_option, "on")) | |
162 | smt_enabled_at_boot = 1; | |
163 | else if (!strcmp(smt_option, "off")) | |
164 | smt_enabled_at_boot = 0; | |
165 | } | |
166 | } | |
167 | } | |
168 | ||
169 | /* Look for smt-enabled= cmdline option */ | |
170 | static int __init early_smt_enabled(char *p) | |
171 | { | |
172 | smt_enabled_cmdline = 1; | |
173 | ||
174 | if (!p) | |
175 | return 0; | |
176 | ||
177 | if (!strcmp(p, "on") || !strcmp(p, "1")) | |
178 | smt_enabled_at_boot = 1; | |
179 | else if (!strcmp(p, "off") || !strcmp(p, "0")) | |
180 | smt_enabled_at_boot = 0; | |
181 | ||
182 | return 0; | |
183 | } | |
184 | early_param("smt-enabled", early_smt_enabled); | |
185 | ||
5ad57078 PM |
186 | #else |
187 | #define check_smt_enabled() | |
40ef8cbc PM |
188 | #endif /* CONFIG_SMP */ |
189 | ||
190 | extern struct machdep_calls pSeries_md; | |
191 | extern struct machdep_calls pmac_md; | |
192 | extern struct machdep_calls maple_md; | |
f3f66f59 | 193 | extern struct machdep_calls cell_md; |
40ef8cbc PM |
194 | extern struct machdep_calls iseries_md; |
195 | ||
196 | /* Ultimately, stuff them in an elf section like initcalls... */ | |
197 | static struct machdep_calls __initdata *machines[] = { | |
198 | #ifdef CONFIG_PPC_PSERIES | |
199 | &pSeries_md, | |
200 | #endif /* CONFIG_PPC_PSERIES */ | |
201 | #ifdef CONFIG_PPC_PMAC | |
202 | &pmac_md, | |
203 | #endif /* CONFIG_PPC_PMAC */ | |
204 | #ifdef CONFIG_PPC_MAPLE | |
205 | &maple_md, | |
206 | #endif /* CONFIG_PPC_MAPLE */ | |
f3f66f59 AB |
207 | #ifdef CONFIG_PPC_CELL |
208 | &cell_md, | |
40ef8cbc PM |
209 | #endif |
210 | #ifdef CONFIG_PPC_ISERIES | |
211 | &iseries_md, | |
212 | #endif | |
213 | NULL | |
214 | }; | |
215 | ||
216 | /* | |
217 | * Early initialization entry point. This is called by head.S | |
218 | * with MMU translation disabled. We rely on the "feature" of | |
219 | * the CPU that ignores the top 2 bits of the address in real | |
220 | * mode so we can access kernel globals normally provided we | |
221 | * only toy with things in the RMO region. From here, we do | |
222 | * some early parsing of the device-tree to setup out LMB | |
223 | * data structures, and allocate & initialize the hash table | |
224 | * and segment tables so we can start running with translation | |
225 | * enabled. | |
226 | * | |
227 | * It is this function which will call the probe() callback of | |
228 | * the various platform types and copy the matching one to the | |
229 | * global ppc_md structure. Your platform can eventually do | |
230 | * some very early initializations from the probe() routine, but | |
231 | * this is not recommended, be very careful as, for example, the | |
232 | * device-tree is not accessible via normal means at this point. | |
233 | */ | |
234 | ||
235 | void __init early_setup(unsigned long dt_ptr) | |
236 | { | |
237 | struct paca_struct *lpaca = get_paca(); | |
238 | static struct machdep_calls **mach; | |
239 | ||
240 | /* | |
241 | * Enable early debugging if any specified (see top of | |
242 | * this file) | |
243 | */ | |
244 | EARLY_DEBUG_INIT(); | |
245 | ||
246 | DBG(" -> early_setup()\n"); | |
247 | ||
40ef8cbc PM |
248 | /* |
249 | * Do early initializations using the flattened device | |
250 | * tree, like retreiving the physical memory map or | |
251 | * calculating/retreiving the hash table size | |
252 | */ | |
253 | early_init_devtree(__va(dt_ptr)); | |
254 | ||
255 | /* | |
256 | * Iterate all ppc_md structures until we find the proper | |
257 | * one for the current machine type | |
258 | */ | |
259 | DBG("Probing machine type for platform %x...\n", | |
260 | systemcfg->platform); | |
261 | ||
262 | for (mach = machines; *mach; mach++) { | |
263 | if ((*mach)->probe(systemcfg->platform)) | |
264 | break; | |
265 | } | |
266 | /* What can we do if we didn't find ? */ | |
267 | if (*mach == NULL) { | |
268 | DBG("No suitable machine found !\n"); | |
269 | for (;;); | |
270 | } | |
271 | ppc_md = **mach; | |
272 | ||
273 | DBG("Found, Initializing memory management...\n"); | |
274 | ||
275 | /* | |
3c726f8d BH |
276 | * Initialize the MMU Hash table and create the linear mapping |
277 | * of memory. Has to be done before stab/slb initialization as | |
278 | * this is currently where the page size encoding is obtained | |
40ef8cbc | 279 | */ |
3c726f8d | 280 | htab_initialize(); |
40ef8cbc PM |
281 | |
282 | /* | |
3c726f8d | 283 | * Initialize stab / SLB management except on iSeries |
40ef8cbc | 284 | */ |
3c726f8d BH |
285 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) { |
286 | if (cpu_has_feature(CPU_FTR_SLB)) | |
287 | slb_initialize(); | |
288 | else | |
289 | stab_initialize(lpaca->stab_real); | |
290 | } | |
40ef8cbc PM |
291 | |
292 | DBG(" <- early_setup()\n"); | |
293 | } | |
294 | ||
295 | ||
b8f51021 ME |
296 | #if defined(CONFIG_SMP) || defined(CONFIG_KEXEC) |
297 | void smp_release_cpus(void) | |
298 | { | |
299 | extern unsigned long __secondary_hold_spinloop; | |
300 | ||
301 | DBG(" -> smp_release_cpus()\n"); | |
302 | ||
303 | /* All secondary cpus are spinning on a common spinloop, release them | |
304 | * all now so they can start to spin on their individual paca | |
305 | * spinloops. For non SMP kernels, the secondary cpus never get out | |
306 | * of the common spinloop. | |
307 | * This is useless but harmless on iSeries, secondaries are already | |
308 | * waiting on their paca spinloops. */ | |
309 | ||
310 | __secondary_hold_spinloop = 1; | |
311 | mb(); | |
312 | ||
313 | DBG(" <- smp_release_cpus()\n"); | |
314 | } | |
5ad57078 PM |
315 | #else |
316 | #define smp_release_cpus() | |
b8f51021 ME |
317 | #endif /* CONFIG_SMP || CONFIG_KEXEC */ |
318 | ||
40ef8cbc PM |
319 | /* |
320 | * Initialize some remaining members of the ppc64_caches and systemcfg structures | |
321 | * (at least until we get rid of them completely). This is mostly some | |
322 | * cache informations about the CPU that will be used by cache flush | |
323 | * routines and/or provided to userland | |
324 | */ | |
325 | static void __init initialize_cache_info(void) | |
326 | { | |
327 | struct device_node *np; | |
328 | unsigned long num_cpus = 0; | |
329 | ||
330 | DBG(" -> initialize_cache_info()\n"); | |
331 | ||
332 | for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) { | |
333 | num_cpus += 1; | |
334 | ||
335 | /* We're assuming *all* of the CPUs have the same | |
336 | * d-cache and i-cache sizes... -Peter | |
337 | */ | |
338 | ||
339 | if ( num_cpus == 1 ) { | |
340 | u32 *sizep, *lsizep; | |
341 | u32 size, lsize; | |
342 | const char *dc, *ic; | |
343 | ||
344 | /* Then read cache informations */ | |
345 | if (systemcfg->platform == PLATFORM_POWERMAC) { | |
346 | dc = "d-cache-block-size"; | |
347 | ic = "i-cache-block-size"; | |
348 | } else { | |
349 | dc = "d-cache-line-size"; | |
350 | ic = "i-cache-line-size"; | |
351 | } | |
352 | ||
353 | size = 0; | |
354 | lsize = cur_cpu_spec->dcache_bsize; | |
355 | sizep = (u32 *)get_property(np, "d-cache-size", NULL); | |
356 | if (sizep != NULL) | |
357 | size = *sizep; | |
358 | lsizep = (u32 *) get_property(np, dc, NULL); | |
359 | if (lsizep != NULL) | |
360 | lsize = *lsizep; | |
361 | if (sizep == 0 || lsizep == 0) | |
362 | DBG("Argh, can't find dcache properties ! " | |
363 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
364 | ||
365 | systemcfg->dcache_size = ppc64_caches.dsize = size; | |
366 | systemcfg->dcache_line_size = | |
367 | ppc64_caches.dline_size = lsize; | |
368 | ppc64_caches.log_dline_size = __ilog2(lsize); | |
369 | ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; | |
370 | ||
371 | size = 0; | |
372 | lsize = cur_cpu_spec->icache_bsize; | |
373 | sizep = (u32 *)get_property(np, "i-cache-size", NULL); | |
374 | if (sizep != NULL) | |
375 | size = *sizep; | |
376 | lsizep = (u32 *)get_property(np, ic, NULL); | |
377 | if (lsizep != NULL) | |
378 | lsize = *lsizep; | |
379 | if (sizep == 0 || lsizep == 0) | |
380 | DBG("Argh, can't find icache properties ! " | |
381 | "sizep: %p, lsizep: %p\n", sizep, lsizep); | |
382 | ||
383 | systemcfg->icache_size = ppc64_caches.isize = size; | |
384 | systemcfg->icache_line_size = | |
385 | ppc64_caches.iline_size = lsize; | |
386 | ppc64_caches.log_iline_size = __ilog2(lsize); | |
387 | ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; | |
388 | } | |
389 | } | |
390 | ||
391 | /* Add an eye catcher and the systemcfg layout version number */ | |
392 | strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); | |
393 | systemcfg->version.major = SYSTEMCFG_MAJOR; | |
394 | systemcfg->version.minor = SYSTEMCFG_MINOR; | |
395 | systemcfg->processor = mfspr(SPRN_PVR); | |
396 | ||
397 | DBG(" <- initialize_cache_info()\n"); | |
398 | } | |
399 | ||
40ef8cbc PM |
400 | |
401 | /* | |
402 | * Do some initial setup of the system. The parameters are those which | |
403 | * were passed in from the bootloader. | |
404 | */ | |
405 | void __init setup_system(void) | |
406 | { | |
407 | DBG(" -> setup_system()\n"); | |
408 | ||
409 | /* | |
410 | * Unflatten the device-tree passed by prom_init or kexec | |
411 | */ | |
412 | unflatten_device_tree(); | |
413 | ||
414 | /* | |
415 | * Fill the ppc64_caches & systemcfg structures with informations | |
416 | * retreived from the device-tree. Need to be called before | |
417 | * finish_device_tree() since the later requires some of the | |
418 | * informations filled up here to properly parse the interrupt | |
419 | * tree. | |
420 | * It also sets up the cache line sizes which allows to call | |
421 | * routines like flush_icache_range (used by the hash init | |
422 | * later on). | |
423 | */ | |
424 | initialize_cache_info(); | |
425 | ||
426 | #ifdef CONFIG_PPC_RTAS | |
427 | /* | |
428 | * Initialize RTAS if available | |
429 | */ | |
430 | rtas_initialize(); | |
431 | #endif /* CONFIG_PPC_RTAS */ | |
40ef8cbc PM |
432 | |
433 | /* | |
434 | * Check if we have an initrd provided via the device-tree | |
435 | */ | |
436 | check_for_initrd(); | |
40ef8cbc PM |
437 | |
438 | /* | |
439 | * Do some platform specific early initializations, that includes | |
440 | * setting up the hash table pointers. It also sets up some interrupt-mapping | |
441 | * related options that will be used by finish_device_tree() | |
442 | */ | |
443 | ppc_md.init_early(); | |
40ef8cbc PM |
444 | |
445 | /* | |
446 | * "Finish" the device-tree, that is do the actual parsing of | |
447 | * some of the properties like the interrupt map | |
448 | */ | |
449 | finish_device_tree(); | |
40ef8cbc | 450 | |
0458060c PM |
451 | #ifdef CONFIG_BOOTX_TEXT |
452 | init_boot_display(); | |
453 | #endif | |
454 | ||
40ef8cbc PM |
455 | /* |
456 | * Initialize xmon | |
457 | */ | |
458 | #ifdef CONFIG_XMON_DEFAULT | |
459 | xmon_init(1); | |
460 | #endif | |
40ef8cbc PM |
461 | /* |
462 | * Register early console | |
463 | */ | |
464 | register_early_udbg_console(); | |
40ef8cbc PM |
465 | |
466 | /* Save unparsed command line copy for /proc/cmdline */ | |
467 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
468 | ||
469 | parse_early_param(); | |
40ef8cbc | 470 | |
5ad57078 PM |
471 | check_smt_enabled(); |
472 | smp_setup_cpu_maps(); | |
40ef8cbc PM |
473 | |
474 | /* Release secondary cpus out of their spinloops at 0x60 now that | |
475 | * we can map physical -> logical CPU ids | |
476 | */ | |
477 | smp_release_cpus(); | |
40ef8cbc PM |
478 | |
479 | printk("Starting Linux PPC64 %s\n", system_utsname.version); | |
480 | ||
481 | printk("-----------------------------------------------------\n"); | |
482 | printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); | |
40ef8cbc PM |
483 | printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); |
484 | printk("systemcfg = 0x%p\n", systemcfg); | |
485 | printk("systemcfg->platform = 0x%x\n", systemcfg->platform); | |
486 | printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount); | |
487 | printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize); | |
488 | printk("ppc64_caches.dcache_line_size = 0x%x\n", | |
489 | ppc64_caches.dline_size); | |
490 | printk("ppc64_caches.icache_line_size = 0x%x\n", | |
491 | ppc64_caches.iline_size); | |
492 | printk("htab_address = 0x%p\n", htab_address); | |
493 | printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); | |
494 | printk("-----------------------------------------------------\n"); | |
40ef8cbc PM |
495 | |
496 | mm_init_ppc64(); | |
40ef8cbc PM |
497 | |
498 | DBG(" <- setup_system()\n"); | |
499 | } | |
500 | ||
40ef8cbc PM |
501 | static int ppc64_panic_event(struct notifier_block *this, |
502 | unsigned long event, void *ptr) | |
503 | { | |
504 | ppc_md.panic((char *)ptr); /* May not return */ | |
505 | return NOTIFY_DONE; | |
506 | } | |
507 | ||
40ef8cbc PM |
508 | #ifdef CONFIG_IRQSTACKS |
509 | static void __init irqstack_early_init(void) | |
510 | { | |
511 | unsigned int i; | |
512 | ||
513 | /* | |
514 | * interrupt stacks must be under 256MB, we cannot afford to take | |
515 | * SLB misses on them. | |
516 | */ | |
517 | for_each_cpu(i) { | |
3c726f8d BH |
518 | softirq_ctx[i] = (struct thread_info *) |
519 | __va(lmb_alloc_base(THREAD_SIZE, | |
520 | THREAD_SIZE, 0x10000000)); | |
521 | hardirq_ctx[i] = (struct thread_info *) | |
522 | __va(lmb_alloc_base(THREAD_SIZE, | |
523 | THREAD_SIZE, 0x10000000)); | |
40ef8cbc PM |
524 | } |
525 | } | |
526 | #else | |
527 | #define irqstack_early_init() | |
528 | #endif | |
529 | ||
530 | /* | |
531 | * Stack space used when we detect a bad kernel stack pointer, and | |
532 | * early in SMP boots before relocation is enabled. | |
533 | */ | |
534 | static void __init emergency_stack_init(void) | |
535 | { | |
536 | unsigned long limit; | |
537 | unsigned int i; | |
538 | ||
539 | /* | |
540 | * Emergency stacks must be under 256MB, we cannot afford to take | |
541 | * SLB misses on them. The ABI also requires them to be 128-byte | |
542 | * aligned. | |
543 | * | |
544 | * Since we use these as temporary stacks during secondary CPU | |
545 | * bringup, we need to get at them in real mode. This means they | |
546 | * must also be within the RMO region. | |
547 | */ | |
548 | limit = min(0x10000000UL, lmb.rmo_size); | |
549 | ||
550 | for_each_cpu(i) | |
3c726f8d BH |
551 | paca[i].emergency_sp = |
552 | __va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE; | |
40ef8cbc PM |
553 | } |
554 | ||
555 | /* | |
556 | * Called from setup_arch to initialize the bitmap of available | |
557 | * syscalls in the systemcfg page | |
558 | */ | |
559 | void __init setup_syscall_map(void) | |
560 | { | |
561 | unsigned int i, count64 = 0, count32 = 0; | |
640768ee SR |
562 | extern unsigned long *sys_call_table; |
563 | extern unsigned long sys_ni_syscall; | |
564 | ||
40ef8cbc PM |
565 | |
566 | for (i = 0; i < __NR_syscalls; i++) { | |
640768ee | 567 | if (sys_call_table[i*2] != sys_ni_syscall) { |
40ef8cbc PM |
568 | count64++; |
569 | systemcfg->syscall_map_64[i >> 5] |= | |
570 | 0x80000000UL >> (i & 0x1f); | |
571 | } | |
640768ee | 572 | if (sys_call_table[i*2+1] != sys_ni_syscall) { |
40ef8cbc PM |
573 | count32++; |
574 | systemcfg->syscall_map_32[i >> 5] |= | |
575 | 0x80000000UL >> (i & 0x1f); | |
576 | } | |
577 | } | |
578 | printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", | |
579 | count32, count64); | |
580 | } | |
581 | ||
582 | /* | |
583 | * Called into from start_kernel, after lock_kernel has been called. | |
584 | * Initializes bootmem, which is unsed to manage page allocation until | |
585 | * mem_init is called. | |
586 | */ | |
587 | void __init setup_arch(char **cmdline_p) | |
588 | { | |
589 | extern void do_init_bootmem(void); | |
590 | ||
40ef8cbc PM |
591 | ppc64_boot_msg(0x12, "Setup Arch"); |
592 | ||
593 | *cmdline_p = cmd_line; | |
594 | ||
595 | /* | |
596 | * Set cache line size based on type of cpu as a default. | |
597 | * Systems with OF can look in the properties on the cpu node(s) | |
598 | * for a possibly more accurate value. | |
599 | */ | |
600 | dcache_bsize = ppc64_caches.dline_size; | |
601 | icache_bsize = ppc64_caches.iline_size; | |
602 | ||
603 | /* reboot on panic */ | |
604 | panic_timeout = 180; | |
40ef8cbc PM |
605 | |
606 | if (ppc_md.panic) | |
607 | notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); | |
608 | ||
609 | init_mm.start_code = PAGE_OFFSET; | |
610 | init_mm.end_code = (unsigned long) _etext; | |
611 | init_mm.end_data = (unsigned long) _edata; | |
612 | init_mm.brk = klimit; | |
613 | ||
614 | irqstack_early_init(); | |
615 | emergency_stack_init(); | |
616 | ||
40ef8cbc PM |
617 | stabs_alloc(); |
618 | ||
619 | /* set up the bootmem stuff with available memory */ | |
620 | do_init_bootmem(); | |
621 | sparse_init(); | |
622 | ||
40ef8cbc PM |
623 | /* initialize the syscall map in systemcfg */ |
624 | setup_syscall_map(); | |
625 | ||
0458060c PM |
626 | #ifdef CONFIG_DUMMY_CONSOLE |
627 | conswitchp = &dummy_con; | |
628 | #endif | |
629 | ||
40ef8cbc PM |
630 | ppc_md.setup_arch(); |
631 | ||
632 | /* Use the default idle loop if the platform hasn't provided one. */ | |
633 | if (NULL == ppc_md.idle_loop) { | |
634 | ppc_md.idle_loop = default_idle; | |
635 | printk(KERN_INFO "Using default idle loop\n"); | |
636 | } | |
637 | ||
638 | paging_init(); | |
639 | ppc64_boot_msg(0x15, "Setup Done"); | |
640 | } | |
641 | ||
642 | ||
643 | /* ToDo: do something useful if ppc_md is not yet setup. */ | |
644 | #define PPC64_LINUX_FUNCTION 0x0f000000 | |
645 | #define PPC64_IPL_MESSAGE 0xc0000000 | |
646 | #define PPC64_TERM_MESSAGE 0xb0000000 | |
647 | ||
648 | static void ppc64_do_msg(unsigned int src, const char *msg) | |
649 | { | |
650 | if (ppc_md.progress) { | |
651 | char buf[128]; | |
652 | ||
653 | sprintf(buf, "%08X\n", src); | |
654 | ppc_md.progress(buf, 0); | |
655 | snprintf(buf, 128, "%s", msg); | |
656 | ppc_md.progress(buf, 0); | |
657 | } | |
658 | } | |
659 | ||
660 | /* Print a boot progress message. */ | |
661 | void ppc64_boot_msg(unsigned int src, const char *msg) | |
662 | { | |
663 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); | |
664 | printk("[boot]%04x %s\n", src, msg); | |
665 | } | |
666 | ||
667 | /* Print a termination message (print only -- does not stop the kernel) */ | |
668 | void ppc64_terminate_msg(unsigned int src, const char *msg) | |
669 | { | |
670 | ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg); | |
671 | printk("[terminate]%04x %s\n", src, msg); | |
672 | } | |
673 | ||
40ef8cbc PM |
674 | #ifndef CONFIG_PPC_ISERIES |
675 | /* | |
676 | * This function can be used by platforms to "find" legacy serial ports. | |
677 | * It works for "serial" nodes under an "isa" node, and will try to | |
678 | * respect the "ibm,aix-loc" property if any. It works with up to 8 | |
679 | * ports. | |
680 | */ | |
681 | ||
682 | #define MAX_LEGACY_SERIAL_PORTS 8 | |
683 | static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; | |
684 | static unsigned int old_serial_count; | |
685 | ||
686 | void __init generic_find_legacy_serial_ports(u64 *physport, | |
687 | unsigned int *default_speed) | |
688 | { | |
689 | struct device_node *np; | |
690 | u32 *sizeprop; | |
691 | ||
692 | struct isa_reg_property { | |
693 | u32 space; | |
694 | u32 address; | |
695 | u32 size; | |
696 | }; | |
697 | struct pci_reg_property { | |
698 | struct pci_address addr; | |
699 | u32 size_hi; | |
700 | u32 size_lo; | |
701 | }; | |
702 | ||
703 | DBG(" -> generic_find_legacy_serial_port()\n"); | |
704 | ||
705 | *physport = 0; | |
706 | if (default_speed) | |
707 | *default_speed = 0; | |
708 | ||
709 | np = of_find_node_by_path("/"); | |
710 | if (!np) | |
711 | return; | |
712 | ||
713 | /* First fill our array */ | |
714 | for (np = NULL; (np = of_find_node_by_type(np, "serial"));) { | |
715 | struct device_node *isa, *pci; | |
716 | struct isa_reg_property *reg; | |
717 | unsigned long phys_size, addr_size, io_base; | |
718 | u32 *rangesp; | |
719 | u32 *interrupts, *clk, *spd; | |
720 | char *typep; | |
721 | int index, rlen, rentsize; | |
722 | ||
723 | /* Ok, first check if it's under an "isa" parent */ | |
724 | isa = of_get_parent(np); | |
725 | if (!isa || strcmp(isa->name, "isa")) { | |
726 | DBG("%s: no isa parent found\n", np->full_name); | |
727 | continue; | |
728 | } | |
729 | ||
730 | /* Now look for an "ibm,aix-loc" property that gives us ordering | |
731 | * if any... | |
732 | */ | |
733 | typep = (char *)get_property(np, "ibm,aix-loc", NULL); | |
734 | ||
735 | /* Get the ISA port number */ | |
736 | reg = (struct isa_reg_property *)get_property(np, "reg", NULL); | |
737 | if (reg == NULL) | |
738 | goto next_port; | |
739 | /* We assume the interrupt number isn't translated ... */ | |
740 | interrupts = (u32 *)get_property(np, "interrupts", NULL); | |
741 | /* get clock freq. if present */ | |
742 | clk = (u32 *)get_property(np, "clock-frequency", NULL); | |
743 | /* get default speed if present */ | |
744 | spd = (u32 *)get_property(np, "current-speed", NULL); | |
745 | /* Default to locate at end of array */ | |
746 | index = old_serial_count; /* end of the array by default */ | |
747 | ||
748 | /* If we have a location index, then use it */ | |
749 | if (typep && *typep == 'S') { | |
750 | index = simple_strtol(typep+1, NULL, 0) - 1; | |
751 | /* if index is out of range, use end of array instead */ | |
752 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
753 | index = old_serial_count; | |
754 | /* if our index is still out of range, that mean that | |
755 | * array is full, we could scan for a free slot but that | |
756 | * make little sense to bother, just skip the port | |
757 | */ | |
758 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
759 | goto next_port; | |
760 | if (index >= old_serial_count) | |
761 | old_serial_count = index + 1; | |
762 | /* Check if there is a port who already claimed our slot */ | |
763 | if (serial_ports[index].iobase != 0) { | |
764 | /* if we still have some room, move it, else override */ | |
765 | if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) { | |
766 | DBG("Moved legacy port %d -> %d\n", index, | |
767 | old_serial_count); | |
768 | serial_ports[old_serial_count++] = | |
769 | serial_ports[index]; | |
770 | } else { | |
771 | DBG("Replacing legacy port %d\n", index); | |
772 | } | |
773 | } | |
774 | } | |
775 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
776 | goto next_port; | |
777 | if (index >= old_serial_count) | |
778 | old_serial_count = index + 1; | |
779 | ||
780 | /* Now fill the entry */ | |
781 | memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port)); | |
782 | serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16; | |
783 | serial_ports[index].iobase = reg->address; | |
784 | serial_ports[index].irq = interrupts ? interrupts[0] : 0; | |
785 | serial_ports[index].flags = ASYNC_BOOT_AUTOCONF; | |
786 | ||
787 | DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n", | |
788 | index, | |
789 | serial_ports[index].iobase, | |
790 | serial_ports[index].irq, | |
791 | serial_ports[index].uartclk); | |
792 | ||
793 | /* Get phys address of IO reg for port 1 */ | |
794 | if (index != 0) | |
795 | goto next_port; | |
796 | ||
797 | pci = of_get_parent(isa); | |
798 | if (!pci) { | |
799 | DBG("%s: no pci parent found\n", np->full_name); | |
800 | goto next_port; | |
801 | } | |
802 | ||
803 | rangesp = (u32 *)get_property(pci, "ranges", &rlen); | |
804 | if (rangesp == NULL) { | |
805 | of_node_put(pci); | |
806 | goto next_port; | |
807 | } | |
808 | rlen /= 4; | |
809 | ||
810 | /* we need the #size-cells of the PCI bridge node itself */ | |
811 | phys_size = 1; | |
812 | sizeprop = (u32 *)get_property(pci, "#size-cells", NULL); | |
813 | if (sizeprop != NULL) | |
814 | phys_size = *sizeprop; | |
815 | /* we need the parent #addr-cells */ | |
816 | addr_size = prom_n_addr_cells(pci); | |
817 | rentsize = 3 + addr_size + phys_size; | |
818 | io_base = 0; | |
819 | for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) { | |
820 | if (((rangesp[0] >> 24) & 0x3) != 1) | |
821 | continue; /* not IO space */ | |
822 | io_base = rangesp[3]; | |
823 | if (addr_size == 2) | |
824 | io_base = (io_base << 32) | rangesp[4]; | |
825 | } | |
826 | if (io_base != 0) { | |
827 | *physport = io_base + reg->address; | |
828 | if (default_speed && spd) | |
829 | *default_speed = *spd; | |
830 | } | |
831 | of_node_put(pci); | |
832 | next_port: | |
833 | of_node_put(isa); | |
834 | } | |
835 | ||
836 | DBG(" <- generic_find_legacy_serial_port()\n"); | |
837 | } | |
838 | ||
839 | static struct platform_device serial_device = { | |
840 | .name = "serial8250", | |
841 | .id = PLAT8250_DEV_PLATFORM, | |
842 | .dev = { | |
843 | .platform_data = serial_ports, | |
844 | }, | |
845 | }; | |
846 | ||
847 | static int __init serial_dev_init(void) | |
848 | { | |
849 | return platform_device_register(&serial_device); | |
850 | } | |
851 | arch_initcall(serial_dev_init); | |
852 | ||
853 | #endif /* CONFIG_PPC_ISERIES */ | |
854 | ||
855 | int check_legacy_ioport(unsigned long base_port) | |
856 | { | |
857 | if (ppc_md.check_legacy_ioport == NULL) | |
858 | return 0; | |
859 | return ppc_md.check_legacy_ioport(base_port); | |
860 | } | |
861 | EXPORT_SYMBOL(check_legacy_ioport); | |
862 | ||
40ef8cbc PM |
863 | void cpu_die(void) |
864 | { | |
865 | if (ppc_md.cpu_die) | |
866 | ppc_md.cpu_die(); | |
867 | } |