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-rw-r--r--arch/ppc64/kernel/setup.c1392
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diff --git a/arch/ppc64/kernel/setup.c b/arch/ppc64/kernel/setup.c
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1/*
2 *
3 * Common boot and setup code.
4 *
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#undef DEBUG
14
15#include <linux/config.h>
16#include <linux/module.h>
17#include <linux/string.h>
18#include <linux/sched.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/reboot.h>
22#include <linux/delay.h>
23#include <linux/initrd.h>
24#include <linux/ide.h>
25#include <linux/seq_file.h>
26#include <linux/ioport.h>
27#include <linux/console.h>
28#include <linux/version.h>
29#include <linux/tty.h>
30#include <linux/root_dev.h>
31#include <linux/notifier.h>
32#include <linux/cpu.h>
33#include <linux/unistd.h>
34#include <linux/serial.h>
35#include <linux/serial_8250.h>
36#include <asm/io.h>
37#include <asm/prom.h>
38#include <asm/processor.h>
39#include <asm/pgtable.h>
40#include <asm/bootinfo.h>
41#include <asm/smp.h>
42#include <asm/elf.h>
43#include <asm/machdep.h>
44#include <asm/iSeries/LparData.h>
45#include <asm/paca.h>
46#include <asm/ppcdebug.h>
47#include <asm/time.h>
48#include <asm/cputable.h>
49#include <asm/sections.h>
50#include <asm/btext.h>
51#include <asm/nvram.h>
52#include <asm/setup.h>
53#include <asm/system.h>
54#include <asm/rtas.h>
55#include <asm/iommu.h>
56#include <asm/serial.h>
57#include <asm/cache.h>
58#include <asm/page.h>
59#include <asm/mmu.h>
60
61#ifdef DEBUG
62#define DBG(fmt...) udbg_printf(fmt)
63#else
64#define DBG(fmt...)
65#endif
66
67/*
68 * Here are some early debugging facilities. You can enable one
69 * but your kernel will not boot on anything else if you do so
70 */
71
72/* This one is for use on LPAR machines that support an HVC console
73 * on vterm 0
74 */
75extern void udbg_init_debug_lpar(void);
76/* This one is for use on Apple G5 machines
77 */
78extern void udbg_init_pmac_realmode(void);
79/* That's RTAS panel debug */
80extern void call_rtas_display_status_delay(unsigned char c);
81/* Here's maple real mode debug */
82extern void udbg_init_maple_realmode(void);
83
84#define EARLY_DEBUG_INIT() do {} while(0)
85
86#if 0
87#define EARLY_DEBUG_INIT() udbg_init_debug_lpar()
88#define EARLY_DEBUG_INIT() udbg_init_maple_realmode()
89#define EARLY_DEBUG_INIT() udbg_init_pmac_realmode()
90#define EARLY_DEBUG_INIT() \
91 do { ppc_md.udbg_putc = call_rtas_display_status_delay; } while(0)
92#endif
93
94/* extern void *stab; */
95extern unsigned long klimit;
96
97extern void mm_init_ppc64(void);
98extern int idle_setup(void);
99extern void stab_initialize(unsigned long stab);
100extern void htab_initialize(void);
101extern void early_init_devtree(void *flat_dt);
102extern void unflatten_device_tree(void);
103
104extern void smp_release_cpus(void);
105
106unsigned long decr_overclock = 1;
107unsigned long decr_overclock_proc0 = 1;
108unsigned long decr_overclock_set = 0;
109unsigned long decr_overclock_proc0_set = 0;
110
111int have_of = 1;
112int boot_cpuid = 0;
113int boot_cpuid_phys = 0;
114dev_t boot_dev;
115u64 ppc64_pft_size;
116u64 ppc64_debug_switch;
117
118struct ppc64_caches ppc64_caches;
119EXPORT_SYMBOL_GPL(ppc64_caches);
120
121/*
122 * These are used in binfmt_elf.c to put aux entries on the stack
123 * for each elf executable being started.
124 */
125int dcache_bsize;
126int icache_bsize;
127int ucache_bsize;
128
129/* The main machine-dep calls structure
130 */
131struct machdep_calls ppc_md;
132EXPORT_SYMBOL(ppc_md);
133
134#ifdef CONFIG_MAGIC_SYSRQ
135unsigned long SYSRQ_KEY;
136#endif /* CONFIG_MAGIC_SYSRQ */
137
138
139static int ppc64_panic_event(struct notifier_block *, unsigned long, void *);
140static struct notifier_block ppc64_panic_block = {
141 .notifier_call = ppc64_panic_event,
142 .priority = INT_MIN /* may not return; must be done last */
143};
144
145/*
146 * Perhaps we can put the pmac screen_info[] here
147 * on pmac as well so we don't need the ifdef's.
148 * Until we get multiple-console support in here
149 * that is. -- Cort
150 * Maybe tie it to serial consoles, since this is really what
151 * these processors use on existing boards. -- Dan
152 */
153struct screen_info screen_info = {
154 .orig_x = 0,
155 .orig_y = 25,
156 .orig_video_cols = 80,
157 .orig_video_lines = 25,
158 .orig_video_isVGA = 1,
159 .orig_video_points = 16
160};
161
162/*
163 * Initialize the PPCDBG state. Called before relocation has been enabled.
164 */
165void __init ppcdbg_initialize(void)
166{
167 ppc64_debug_switch = PPC_DEBUG_DEFAULT; /* | PPCDBG_BUSWALK | */
168 /* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */;
169}
170
171/*
172 * Early boot console based on udbg
173 */
174static struct console udbg_console = {
175 .name = "udbg",
176 .write = udbg_console_write,
177 .flags = CON_PRINTBUFFER,
178 .index = -1,
179};
180static int early_console_initialized;
181
182void __init disable_early_printk(void)
183{
184 if (!early_console_initialized)
185 return;
186 unregister_console(&udbg_console);
187 early_console_initialized = 0;
188}
189
190#if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP)
191
192static int smt_enabled_cmdline;
193
194/* Look for ibm,smt-enabled OF option */
195static void check_smt_enabled(void)
196{
197 struct device_node *dn;
198 char *smt_option;
199
200 /* Allow the command line to overrule the OF option */
201 if (smt_enabled_cmdline)
202 return;
203
204 dn = of_find_node_by_path("/options");
205
206 if (dn) {
207 smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL);
208
209 if (smt_option) {
210 if (!strcmp(smt_option, "on"))
211 smt_enabled_at_boot = 1;
212 else if (!strcmp(smt_option, "off"))
213 smt_enabled_at_boot = 0;
214 }
215 }
216}
217
218/* Look for smt-enabled= cmdline option */
219static int __init early_smt_enabled(char *p)
220{
221 smt_enabled_cmdline = 1;
222
223 if (!p)
224 return 0;
225
226 if (!strcmp(p, "on") || !strcmp(p, "1"))
227 smt_enabled_at_boot = 1;
228 else if (!strcmp(p, "off") || !strcmp(p, "0"))
229 smt_enabled_at_boot = 0;
230
231 return 0;
232}
233early_param("smt-enabled", early_smt_enabled);
234
235/**
236 * setup_cpu_maps - initialize the following cpu maps:
237 * cpu_possible_map
238 * cpu_present_map
239 * cpu_sibling_map
240 *
241 * Having the possible map set up early allows us to restrict allocations
242 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
243 *
244 * We do not initialize the online map here; cpus set their own bits in
245 * cpu_online_map as they come up.
246 *
247 * This function is valid only for Open Firmware systems. finish_device_tree
248 * must be called before using this.
249 *
250 * While we're here, we may as well set the "physical" cpu ids in the paca.
251 */
252static void __init setup_cpu_maps(void)
253{
254 struct device_node *dn = NULL;
255 int cpu = 0;
256 int swap_cpuid = 0;
257
258 check_smt_enabled();
259
260 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
261 u32 *intserv;
262 int j, len = sizeof(u32), nthreads;
263
264 intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s",
265 &len);
266 if (!intserv)
267 intserv = (u32 *)get_property(dn, "reg", NULL);
268
269 nthreads = len / sizeof(u32);
270
271 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
272 cpu_set(cpu, cpu_present_map);
273 set_hard_smp_processor_id(cpu, intserv[j]);
274
275 if (intserv[j] == boot_cpuid_phys)
276 swap_cpuid = cpu;
277 cpu_set(cpu, cpu_possible_map);
278 cpu++;
279 }
280 }
281
282 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
283 * boot cpu is logical 0.
284 */
285 if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
286 u32 tmp;
287 tmp = get_hard_smp_processor_id(0);
288 set_hard_smp_processor_id(0, boot_cpuid_phys);
289 set_hard_smp_processor_id(swap_cpuid, tmp);
290 }
291
292 /*
293 * On pSeries LPAR, we need to know how many cpus
294 * could possibly be added to this partition.
295 */
296 if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
297 (dn = of_find_node_by_path("/rtas"))) {
298 int num_addr_cell, num_size_cell, maxcpus;
299 unsigned int *ireg;
300
301 num_addr_cell = prom_n_addr_cells(dn);
302 num_size_cell = prom_n_size_cells(dn);
303
304 ireg = (unsigned int *)
305 get_property(dn, "ibm,lrdr-capacity", NULL);
306
307 if (!ireg)
308 goto out;
309
310 maxcpus = ireg[num_addr_cell + num_size_cell];
311
312 /* Double maxcpus for processors which have SMT capability */
313 if (cpu_has_feature(CPU_FTR_SMT))
314 maxcpus *= 2;
315
316 if (maxcpus > NR_CPUS) {
317 printk(KERN_WARNING
318 "Partition configured for %d cpus, "
319 "operating system maximum is %d.\n",
320 maxcpus, NR_CPUS);
321 maxcpus = NR_CPUS;
322 } else
323 printk(KERN_INFO "Partition configured for %d cpus.\n",
324 maxcpus);
325
326 for (cpu = 0; cpu < maxcpus; cpu++)
327 cpu_set(cpu, cpu_possible_map);
328 out:
329 of_node_put(dn);
330 }
331
332 /*
333 * Do the sibling map; assume only two threads per processor.
334 */
335 for_each_cpu(cpu) {
336 cpu_set(cpu, cpu_sibling_map[cpu]);
337 if (cpu_has_feature(CPU_FTR_SMT))
338 cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
339 }
340
341 systemcfg->processorCount = num_present_cpus();
342}
343#endif /* defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) */
344
345
346#ifdef CONFIG_PPC_MULTIPLATFORM
347
348extern struct machdep_calls pSeries_md;
349extern struct machdep_calls pmac_md;
350extern struct machdep_calls maple_md;
351
352/* Ultimately, stuff them in an elf section like initcalls... */
353static struct machdep_calls __initdata *machines[] = {
354#ifdef CONFIG_PPC_PSERIES
355 &pSeries_md,
356#endif /* CONFIG_PPC_PSERIES */
357#ifdef CONFIG_PPC_PMAC
358 &pmac_md,
359#endif /* CONFIG_PPC_PMAC */
360#ifdef CONFIG_PPC_MAPLE
361 &maple_md,
362#endif /* CONFIG_PPC_MAPLE */
363 NULL
364};
365
366/*
367 * Early initialization entry point. This is called by head.S
368 * with MMU translation disabled. We rely on the "feature" of
369 * the CPU that ignores the top 2 bits of the address in real
370 * mode so we can access kernel globals normally provided we
371 * only toy with things in the RMO region. From here, we do
372 * some early parsing of the device-tree to setup out LMB
373 * data structures, and allocate & initialize the hash table
374 * and segment tables so we can start running with translation
375 * enabled.
376 *
377 * It is this function which will call the probe() callback of
378 * the various platform types and copy the matching one to the
379 * global ppc_md structure. Your platform can eventually do
380 * some very early initializations from the probe() routine, but
381 * this is not recommended, be very careful as, for example, the
382 * device-tree is not accessible via normal means at this point.
383 */
384
385void __init early_setup(unsigned long dt_ptr)
386{
387 struct paca_struct *lpaca = get_paca();
388 static struct machdep_calls **mach;
389
390 /*
391 * Enable early debugging if any specified (see top of
392 * this file)
393 */
394 EARLY_DEBUG_INIT();
395
396 DBG(" -> early_setup()\n");
397
398 /*
399 * Fill the default DBG level (do we want to keep
400 * that old mecanism around forever ?)
401 */
402 ppcdbg_initialize();
403
404 /*
405 * Do early initializations using the flattened device
406 * tree, like retreiving the physical memory map or
407 * calculating/retreiving the hash table size
408 */
409 early_init_devtree(__va(dt_ptr));
410
411 /*
412 * Iterate all ppc_md structures until we find the proper
413 * one for the current machine type
414 */
415 DBG("Probing machine type for platform %x...\n",
416 systemcfg->platform);
417
418 for (mach = machines; *mach; mach++) {
419 if ((*mach)->probe(systemcfg->platform))
420 break;
421 }
422 /* What can we do if we didn't find ? */
423 if (*mach == NULL) {
424 DBG("No suitable machine found !\n");
425 for (;;);
426 }
427 ppc_md = **mach;
428
429 /* our udbg callbacks got overriden by the above, let's put them
430 * back in. Ultimately, I want those things to be split from the
431 * main ppc_md
432 */
433 EARLY_DEBUG_INIT();
434
435 DBG("Found, Initializing memory management...\n");
436
437 /*
438 * Initialize stab / SLB management
439 */
440 stab_initialize(lpaca->stab_real);
441
442 /*
443 * Initialize the MMU Hash table and create the linear mapping
444 * of memory
445 */
446 htab_initialize();
447
448 DBG(" <- early_setup()\n");
449}
450
451
452/*
453 * Initialize some remaining members of the ppc64_caches and systemcfg structures
454 * (at least until we get rid of them completely). This is mostly some
455 * cache informations about the CPU that will be used by cache flush
456 * routines and/or provided to userland
457 */
458static void __init initialize_cache_info(void)
459{
460 struct device_node *np;
461 unsigned long num_cpus = 0;
462
463 DBG(" -> initialize_cache_info()\n");
464
465 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) {
466 num_cpus += 1;
467
468 /* We're assuming *all* of the CPUs have the same
469 * d-cache and i-cache sizes... -Peter
470 */
471
472 if ( num_cpus == 1 ) {
473 u32 *sizep, *lsizep;
474 u32 size, lsize;
475 const char *dc, *ic;
476
477 /* Then read cache informations */
478 if (systemcfg->platform == PLATFORM_POWERMAC) {
479 dc = "d-cache-block-size";
480 ic = "i-cache-block-size";
481 } else {
482 dc = "d-cache-line-size";
483 ic = "i-cache-line-size";
484 }
485
486 size = 0;
487 lsize = cur_cpu_spec->dcache_bsize;
488 sizep = (u32 *)get_property(np, "d-cache-size", NULL);
489 if (sizep != NULL)
490 size = *sizep;
491 lsizep = (u32 *) get_property(np, dc, NULL);
492 if (lsizep != NULL)
493 lsize = *lsizep;
494 if (sizep == 0 || lsizep == 0)
495 DBG("Argh, can't find dcache properties ! "
496 "sizep: %p, lsizep: %p\n", sizep, lsizep);
497
498 systemcfg->dcache_size = ppc64_caches.dsize = size;
499 systemcfg->dcache_line_size =
500 ppc64_caches.dline_size = lsize;
501 ppc64_caches.log_dline_size = __ilog2(lsize);
502 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize;
503
504 size = 0;
505 lsize = cur_cpu_spec->icache_bsize;
506 sizep = (u32 *)get_property(np, "i-cache-size", NULL);
507 if (sizep != NULL)
508 size = *sizep;
509 lsizep = (u32 *)get_property(np, ic, NULL);
510 if (lsizep != NULL)
511 lsize = *lsizep;
512 if (sizep == 0 || lsizep == 0)
513 DBG("Argh, can't find icache properties ! "
514 "sizep: %p, lsizep: %p\n", sizep, lsizep);
515
516 systemcfg->icache_size = ppc64_caches.isize = size;
517 systemcfg->icache_line_size =
518 ppc64_caches.iline_size = lsize;
519 ppc64_caches.log_iline_size = __ilog2(lsize);
520 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize;
521 }
522 }
523
524 /* Add an eye catcher and the systemcfg layout version number */
525 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
526 systemcfg->version.major = SYSTEMCFG_MAJOR;
527 systemcfg->version.minor = SYSTEMCFG_MINOR;
528 systemcfg->processor = mfspr(SPRN_PVR);
529
530 DBG(" <- initialize_cache_info()\n");
531}
532
533static void __init check_for_initrd(void)
534{
535#ifdef CONFIG_BLK_DEV_INITRD
536 u64 *prop;
537
538 DBG(" -> check_for_initrd()\n");
539
540 prop = (u64 *)get_property(of_chosen, "linux,initrd-start", NULL);
541 if (prop != NULL) {
542 initrd_start = (unsigned long)__va(*prop);
543 prop = (u64 *)get_property(of_chosen, "linux,initrd-end", NULL);
544 if (prop != NULL) {
545 initrd_end = (unsigned long)__va(*prop);
546 initrd_below_start_ok = 1;
547 } else
548 initrd_start = 0;
549 }
550
551 /* If we were passed an initrd, set the ROOT_DEV properly if the values
552 * look sensible. If not, clear initrd reference.
553 */
554 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
555 initrd_end > initrd_start)
556 ROOT_DEV = Root_RAM0;
557 else
558 initrd_start = initrd_end = 0;
559
560 if (initrd_start)
561 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
562
563 DBG(" <- check_for_initrd()\n");
564#endif /* CONFIG_BLK_DEV_INITRD */
565}
566
567#endif /* CONFIG_PPC_MULTIPLATFORM */
568
569/*
570 * Do some initial setup of the system. The parameters are those which
571 * were passed in from the bootloader.
572 */
573void __init setup_system(void)
574{
575 DBG(" -> setup_system()\n");
576
577#ifdef CONFIG_PPC_ISERIES
578 /* pSeries systems are identified in prom.c via OF. */
579 if (itLpNaca.xLparInstalled == 1)
580 systemcfg->platform = PLATFORM_ISERIES_LPAR;
581
582 ppc_md.init_early();
583#else /* CONFIG_PPC_ISERIES */
584
585 /*
586 * Unflatten the device-tree passed by prom_init or kexec
587 */
588 unflatten_device_tree();
589
590 /*
591 * Fill the ppc64_caches & systemcfg structures with informations
592 * retreived from the device-tree. Need to be called before
593 * finish_device_tree() since the later requires some of the
594 * informations filled up here to properly parse the interrupt
595 * tree.
596 * It also sets up the cache line sizes which allows to call
597 * routines like flush_icache_range (used by the hash init
598 * later on).
599 */
600 initialize_cache_info();
601
602#ifdef CONFIG_PPC_RTAS
603 /*
604 * Initialize RTAS if available
605 */
606 rtas_initialize();
607#endif /* CONFIG_PPC_RTAS */
608
609 /*
610 * Check if we have an initrd provided via the device-tree
611 */
612 check_for_initrd();
613
614 /*
615 * Do some platform specific early initializations, that includes
616 * setting up the hash table pointers. It also sets up some interrupt-mapping
617 * related options that will be used by finish_device_tree()
618 */
619 ppc_md.init_early();
620
621 /*
622 * "Finish" the device-tree, that is do the actual parsing of
623 * some of the properties like the interrupt map
624 */
625 finish_device_tree();
626
627 /*
628 * Initialize xmon
629 */
630#ifdef CONFIG_XMON_DEFAULT
631 xmon_init();
632#endif
633 /*
634 * Register early console
635 */
636 early_console_initialized = 1;
637 register_console(&udbg_console);
638
639 /* Save unparsed command line copy for /proc/cmdline */
640 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
641
642 parse_early_param();
643#endif /* !CONFIG_PPC_ISERIES */
644
645#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES)
646 /*
647 * iSeries has already initialized the cpu maps at this point.
648 */
649 setup_cpu_maps();
650
651 /* Release secondary cpus out of their spinloops at 0x60 now that
652 * we can map physical -> logical CPU ids
653 */
654 smp_release_cpus();
655#endif /* defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) */
656
657 printk("Starting Linux PPC64 %s\n", UTS_RELEASE);
658
659 printk("-----------------------------------------------------\n");
660 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size);
661 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch);
662 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller);
663 printk("systemcfg = 0x%p\n", systemcfg);
664 printk("systemcfg->platform = 0x%x\n", systemcfg->platform);
665 printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount);
666 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize);
667 printk("ppc64_caches.dcache_line_size = 0x%x\n",
668 ppc64_caches.dline_size);
669 printk("ppc64_caches.icache_line_size = 0x%x\n",
670 ppc64_caches.iline_size);
671 printk("htab_address = 0x%p\n", htab_address);
672 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask);
673 printk("-----------------------------------------------------\n");
674
675 mm_init_ppc64();
676
677 DBG(" <- setup_system()\n");
678}
679
680
681void machine_restart(char *cmd)
682{
683 if (ppc_md.nvram_sync)
684 ppc_md.nvram_sync();
685 ppc_md.restart(cmd);
686}
687
688EXPORT_SYMBOL(machine_restart);
689
690void machine_power_off(void)
691{
692 if (ppc_md.nvram_sync)
693 ppc_md.nvram_sync();
694 ppc_md.power_off();
695}
696
697EXPORT_SYMBOL(machine_power_off);
698
699void machine_halt(void)
700{
701 if (ppc_md.nvram_sync)
702 ppc_md.nvram_sync();
703 ppc_md.halt();
704}
705
706EXPORT_SYMBOL(machine_halt);
707
708unsigned long ppc_proc_freq;
709unsigned long ppc_tb_freq;
710
711static int ppc64_panic_event(struct notifier_block *this,
712 unsigned long event, void *ptr)
713{
714 ppc_md.panic((char *)ptr); /* May not return */
715 return NOTIFY_DONE;
716}
717
718
719#ifdef CONFIG_SMP
720DEFINE_PER_CPU(unsigned int, pvr);
721#endif
722
723static int show_cpuinfo(struct seq_file *m, void *v)
724{
725 unsigned long cpu_id = (unsigned long)v - 1;
726 unsigned int pvr;
727 unsigned short maj;
728 unsigned short min;
729
730 if (cpu_id == NR_CPUS) {
731 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
732
733 if (ppc_md.get_cpuinfo != NULL)
734 ppc_md.get_cpuinfo(m);
735
736 return 0;
737 }
738
739 /* We only show online cpus: disable preempt (overzealous, I
740 * knew) to prevent cpu going down. */
741 preempt_disable();
742 if (!cpu_online(cpu_id)) {
743 preempt_enable();
744 return 0;
745 }
746
747#ifdef CONFIG_SMP
748 pvr = per_cpu(pvr, cpu_id);
749#else
750 pvr = mfspr(SPRN_PVR);
751#endif
752 maj = (pvr >> 8) & 0xFF;
753 min = pvr & 0xFF;
754
755 seq_printf(m, "processor\t: %lu\n", cpu_id);
756 seq_printf(m, "cpu\t\t: ");
757
758 if (cur_cpu_spec->pvr_mask)
759 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
760 else
761 seq_printf(m, "unknown (%08x)", pvr);
762
763#ifdef CONFIG_ALTIVEC
764 if (cpu_has_feature(CPU_FTR_ALTIVEC))
765 seq_printf(m, ", altivec supported");
766#endif /* CONFIG_ALTIVEC */
767
768 seq_printf(m, "\n");
769
770 /*
771 * Assume here that all clock rates are the same in a
772 * smp system. -- Cort
773 */
774 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000,
775 ppc_proc_freq % 1000000);
776
777 seq_printf(m, "revision\t: %hd.%hd\n\n", maj, min);
778
779 preempt_enable();
780 return 0;
781}
782
783static void *c_start(struct seq_file *m, loff_t *pos)
784{
785 return *pos <= NR_CPUS ? (void *)((*pos)+1) : NULL;
786}
787static void *c_next(struct seq_file *m, void *v, loff_t *pos)
788{
789 ++*pos;
790 return c_start(m, pos);
791}
792static void c_stop(struct seq_file *m, void *v)
793{
794}
795struct seq_operations cpuinfo_op = {
796 .start =c_start,
797 .next = c_next,
798 .stop = c_stop,
799 .show = show_cpuinfo,
800};
801
802/*
803 * These three variables are used to save values passed to us by prom_init()
804 * via the device tree. The TCE variables are needed because with a memory_limit
805 * in force we may need to explicitly map the TCE are at the top of RAM.
806 */
807unsigned long memory_limit;
808unsigned long tce_alloc_start;
809unsigned long tce_alloc_end;
810
811#ifdef CONFIG_PPC_ISERIES
812/*
813 * On iSeries we just parse the mem=X option from the command line.
814 * On pSeries it's a bit more complicated, see prom_init_mem()
815 */
816static int __init early_parsemem(char *p)
817{
818 if (!p)
819 return 0;
820
821 memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE);
822
823 return 0;
824}
825early_param("mem", early_parsemem);
826#endif /* CONFIG_PPC_ISERIES */
827
828#ifdef CONFIG_PPC_MULTIPLATFORM
829static int __init set_preferred_console(void)
830{
831 struct device_node *prom_stdout = NULL;
832 char *name;
833 u32 *spd;
834 int offset = 0;
835
836 DBG(" -> set_preferred_console()\n");
837
838 /* The user has requested a console so this is already set up. */
839 if (strstr(saved_command_line, "console=")) {
840 DBG(" console was specified !\n");
841 return -EBUSY;
842 }
843
844 if (!of_chosen) {
845 DBG(" of_chosen is NULL !\n");
846 return -ENODEV;
847 }
848 /* We are getting a weird phandle from OF ... */
849 /* ... So use the full path instead */
850 name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
851 if (name == NULL) {
852 DBG(" no linux,stdout-path !\n");
853 return -ENODEV;
854 }
855 prom_stdout = of_find_node_by_path(name);
856 if (!prom_stdout) {
857 DBG(" can't find stdout package %s !\n", name);
858 return -ENODEV;
859 }
860 DBG("stdout is %s\n", prom_stdout->full_name);
861
862 name = (char *)get_property(prom_stdout, "name", NULL);
863 if (!name) {
864 DBG(" stdout package has no name !\n");
865 goto not_found;
866 }
867 spd = (u32 *)get_property(prom_stdout, "current-speed", NULL);
868
869 if (0)
870 ;
871#ifdef CONFIG_SERIAL_8250_CONSOLE
872 else if (strcmp(name, "serial") == 0) {
873 int i;
874 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
875 if (i > 8) {
876 switch (reg[1]) {
877 case 0x3f8:
878 offset = 0;
879 break;
880 case 0x2f8:
881 offset = 1;
882 break;
883 case 0x898:
884 offset = 2;
885 break;
886 case 0x890:
887 offset = 3;
888 break;
889 default:
890 /* We dont recognise the serial port */
891 goto not_found;
892 }
893 }
894 }
895#endif /* CONFIG_SERIAL_8250_CONSOLE */
896#ifdef CONFIG_PPC_PSERIES
897 else if (strcmp(name, "vty") == 0) {
898 u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL);
899 char *compat = (char *)get_property(prom_stdout, "compatible", NULL);
900
901 if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
902 /* Host Virtual Serial Interface */
903 int offset;
904 switch (reg[0]) {
905 case 0x30000000:
906 offset = 0;
907 break;
908 case 0x30000001:
909 offset = 1;
910 break;
911 default:
912 goto not_found;
913 }
914 of_node_put(prom_stdout);
915 DBG("Found hvsi console at offset %d\n", offset);
916 return add_preferred_console("hvsi", offset, NULL);
917 } else {
918 /* pSeries LPAR virtual console */
919 of_node_put(prom_stdout);
920 DBG("Found hvc console\n");
921 return add_preferred_console("hvc", 0, NULL);
922 }
923 }
924#endif /* CONFIG_PPC_PSERIES */
925#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
926 else if (strcmp(name, "ch-a") == 0)
927 offset = 0;
928 else if (strcmp(name, "ch-b") == 0)
929 offset = 1;
930#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
931 else
932 goto not_found;
933 of_node_put(prom_stdout);
934
935 DBG("Found serial console at ttyS%d\n", offset);
936
937 if (spd) {
938 static char __initdata opt[16];
939 sprintf(opt, "%d", *spd);
940 return add_preferred_console("ttyS", offset, opt);
941 } else
942 return add_preferred_console("ttyS", offset, NULL);
943
944 not_found:
945 DBG("No preferred console found !\n");
946 of_node_put(prom_stdout);
947 return -ENODEV;
948}
949console_initcall(set_preferred_console);
950#endif /* CONFIG_PPC_MULTIPLATFORM */
951
952#ifdef CONFIG_IRQSTACKS
953static void __init irqstack_early_init(void)
954{
955 unsigned int i;
956
957 /*
958 * interrupt stacks must be under 256MB, we cannot afford to take
959 * SLB misses on them.
960 */
961 for_each_cpu(i) {
962 softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
963 THREAD_SIZE, 0x10000000));
964 hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
965 THREAD_SIZE, 0x10000000));
966 }
967}
968#else
969#define irqstack_early_init()
970#endif
971
972/*
973 * Stack space used when we detect a bad kernel stack pointer, and
974 * early in SMP boots before relocation is enabled.
975 */
976static void __init emergency_stack_init(void)
977{
978 unsigned long limit;
979 unsigned int i;
980
981 /*
982 * Emergency stacks must be under 256MB, we cannot afford to take
983 * SLB misses on them. The ABI also requires them to be 128-byte
984 * aligned.
985 *
986 * Since we use these as temporary stacks during secondary CPU
987 * bringup, we need to get at them in real mode. This means they
988 * must also be within the RMO region.
989 */
990 limit = min(0x10000000UL, lmb.rmo_size);
991
992 for_each_cpu(i)
993 paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128,
994 limit)) + PAGE_SIZE;
995}
996
997/*
998 * Called from setup_arch to initialize the bitmap of available
999 * syscalls in the systemcfg page
1000 */
1001void __init setup_syscall_map(void)
1002{
1003 unsigned int i, count64 = 0, count32 = 0;
1004 extern unsigned long *sys_call_table;
1005 extern unsigned long *sys_call_table32;
1006 extern unsigned long sys_ni_syscall;
1007
1008
1009 for (i = 0; i < __NR_syscalls; i++) {
1010 if (sys_call_table[i] == sys_ni_syscall)
1011 continue;
1012 count64++;
1013 systemcfg->syscall_map_64[i >> 5] |= 0x80000000UL >> (i & 0x1f);
1014 }
1015 for (i = 0; i < __NR_syscalls; i++) {
1016 if (sys_call_table32[i] == sys_ni_syscall)
1017 continue;
1018 count32++;
1019 systemcfg->syscall_map_32[i >> 5] |= 0x80000000UL >> (i & 0x1f);
1020 }
1021 printk(KERN_INFO "Syscall map setup, %d 32 bits and %d 64 bits syscalls\n",
1022 count32, count64);
1023}
1024
1025/*
1026 * Called into from start_kernel, after lock_kernel has been called.
1027 * Initializes bootmem, which is unsed to manage page allocation until
1028 * mem_init is called.
1029 */
1030void __init setup_arch(char **cmdline_p)
1031{
1032 extern void do_init_bootmem(void);
1033
1034 ppc64_boot_msg(0x12, "Setup Arch");
1035
1036 *cmdline_p = cmd_line;
1037
1038 /*
1039 * Set cache line size based on type of cpu as a default.
1040 * Systems with OF can look in the properties on the cpu node(s)
1041 * for a possibly more accurate value.
1042 */
1043 dcache_bsize = ppc64_caches.dline_size;
1044 icache_bsize = ppc64_caches.iline_size;
1045
1046 /* reboot on panic */
1047 panic_timeout = 180;
1048
1049 if (ppc_md.panic)
1050 notifier_chain_register(&panic_notifier_list, &ppc64_panic_block);
1051
1052 init_mm.start_code = PAGE_OFFSET;
1053 init_mm.end_code = (unsigned long) _etext;
1054 init_mm.end_data = (unsigned long) _edata;
1055 init_mm.brk = klimit;
1056
1057 irqstack_early_init();
1058 emergency_stack_init();
1059
1060 /* set up the bootmem stuff with available memory */
1061 do_init_bootmem();
1062
1063 /* initialize the syscall map in systemcfg */
1064 setup_syscall_map();
1065
1066 ppc_md.setup_arch();
1067
1068 /* Select the correct idle loop for the platform. */
1069 idle_setup();
1070
1071 paging_init();
1072 ppc64_boot_msg(0x15, "Setup Done");
1073}
1074
1075
1076/* ToDo: do something useful if ppc_md is not yet setup. */
1077#define PPC64_LINUX_FUNCTION 0x0f000000
1078#define PPC64_IPL_MESSAGE 0xc0000000
1079#define PPC64_TERM_MESSAGE 0xb0000000
1080#define PPC64_ATTN_MESSAGE 0xa0000000
1081#define PPC64_DUMP_MESSAGE 0xd0000000
1082
1083static void ppc64_do_msg(unsigned int src, const char *msg)
1084{
1085 if (ppc_md.progress) {
1086 char buf[32];
1087
1088 sprintf(buf, "%08x \n", src);
1089 ppc_md.progress(buf, 0);
1090 sprintf(buf, "%-16s", msg);
1091 ppc_md.progress(buf, 0);
1092 }
1093}
1094
1095/* Print a boot progress message. */
1096void ppc64_boot_msg(unsigned int src, const char *msg)
1097{
1098 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg);
1099 printk("[boot]%04x %s\n", src, msg);
1100}
1101
1102/* Print a termination message (print only -- does not stop the kernel) */
1103void ppc64_terminate_msg(unsigned int src, const char *msg)
1104{
1105 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg);
1106 printk("[terminate]%04x %s\n", src, msg);
1107}
1108
1109/* Print something that needs attention (device error, etc) */
1110void ppc64_attention_msg(unsigned int src, const char *msg)
1111{
1112 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_ATTN_MESSAGE|src, msg);
1113 printk("[attention]%04x %s\n", src, msg);
1114}
1115
1116/* Print a dump progress message. */
1117void ppc64_dump_msg(unsigned int src, const char *msg)
1118{
1119 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_DUMP_MESSAGE|src, msg);
1120 printk("[dump]%04x %s\n", src, msg);
1121}
1122
1123int set_spread_lpevents( char * str )
1124{
1125 /* The parameter is the number of processors to share in processing lp events */
1126 unsigned long i;
1127 unsigned long val = simple_strtoul( str, NULL, 0 );
1128 if ( ( val > 0 ) && ( val <= NR_CPUS ) ) {
1129 for ( i=1; i<val; ++i )
1130 paca[i].lpqueue_ptr = paca[0].lpqueue_ptr;
1131 printk("lpevent processing spread over %ld processors\n", val);
1132 }
1133 else
1134 printk("invalid spreaqd_lpevents %ld\n", val);
1135 return 1;
1136}
1137
1138/* This should only be called on processor 0 during calibrate decr */
1139void setup_default_decr(void)
1140{
1141 struct paca_struct *lpaca = get_paca();
1142
1143 if ( decr_overclock_set && !decr_overclock_proc0_set )
1144 decr_overclock_proc0 = decr_overclock;
1145
1146 lpaca->default_decr = tb_ticks_per_jiffy / decr_overclock_proc0;
1147 lpaca->next_jiffy_update_tb = get_tb() + tb_ticks_per_jiffy;
1148}
1149
1150int set_decr_overclock_proc0( char * str )
1151{
1152 unsigned long val = simple_strtoul( str, NULL, 0 );
1153 if ( ( val >= 1 ) && ( val <= 48 ) ) {
1154 decr_overclock_proc0_set = 1;
1155 decr_overclock_proc0 = val;
1156 printk("proc 0 decrementer overclock factor of %ld\n", val);
1157 }
1158 else
1159 printk("invalid proc 0 decrementer overclock factor of %ld\n", val);
1160 return 1;
1161}
1162
1163int set_decr_overclock( char * str )
1164{
1165 unsigned long val = simple_strtoul( str, NULL, 0 );
1166 if ( ( val >= 1 ) && ( val <= 48 ) ) {
1167 decr_overclock_set = 1;
1168 decr_overclock = val;
1169 printk("decrementer overclock factor of %ld\n", val);
1170 }
1171 else
1172 printk("invalid decrementer overclock factor of %ld\n", val);
1173 return 1;
1174
1175}
1176
1177__setup("spread_lpevents=", set_spread_lpevents );
1178__setup("decr_overclock_proc0=", set_decr_overclock_proc0 );
1179__setup("decr_overclock=", set_decr_overclock );
1180
1181#ifndef CONFIG_PPC_ISERIES
1182/*
1183 * This function can be used by platforms to "find" legacy serial ports.
1184 * It works for "serial" nodes under an "isa" node, and will try to
1185 * respect the "ibm,aix-loc" property if any. It works with up to 8
1186 * ports.
1187 */
1188
1189#define MAX_LEGACY_SERIAL_PORTS 8
1190static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
1191static unsigned int old_serial_count;
1192
1193void __init generic_find_legacy_serial_ports(u64 *physport,
1194 unsigned int *default_speed)
1195{
1196 struct device_node *np;
1197 u32 *sizeprop;
1198
1199 struct isa_reg_property {
1200 u32 space;
1201 u32 address;
1202 u32 size;
1203 };
1204 struct pci_reg_property {
1205 struct pci_address addr;
1206 u32 size_hi;
1207 u32 size_lo;
1208 };
1209
1210 DBG(" -> generic_find_legacy_serial_port()\n");
1211
1212 *physport = 0;
1213 if (default_speed)
1214 *default_speed = 0;
1215
1216 np = of_find_node_by_path("/");
1217 if (!np)
1218 return;
1219
1220 /* First fill our array */
1221 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
1222 struct device_node *isa, *pci;
1223 struct isa_reg_property *reg;
1224 unsigned long phys_size, addr_size, io_base;
1225 u32 *rangesp;
1226 u32 *interrupts, *clk, *spd;
1227 char *typep;
1228 int index, rlen, rentsize;
1229
1230 /* Ok, first check if it's under an "isa" parent */
1231 isa = of_get_parent(np);
1232 if (!isa || strcmp(isa->name, "isa")) {
1233 DBG("%s: no isa parent found\n", np->full_name);
1234 continue;
1235 }
1236
1237 /* Now look for an "ibm,aix-loc" property that gives us ordering
1238 * if any...
1239 */
1240 typep = (char *)get_property(np, "ibm,aix-loc", NULL);
1241
1242 /* Get the ISA port number */
1243 reg = (struct isa_reg_property *)get_property(np, "reg", NULL);
1244 if (reg == NULL)
1245 goto next_port;
1246 /* We assume the interrupt number isn't translated ... */
1247 interrupts = (u32 *)get_property(np, "interrupts", NULL);
1248 /* get clock freq. if present */
1249 clk = (u32 *)get_property(np, "clock-frequency", NULL);
1250 /* get default speed if present */
1251 spd = (u32 *)get_property(np, "current-speed", NULL);
1252 /* Default to locate at end of array */
1253 index = old_serial_count; /* end of the array by default */
1254
1255 /* If we have a location index, then use it */
1256 if (typep && *typep == 'S') {
1257 index = simple_strtol(typep+1, NULL, 0) - 1;
1258 /* if index is out of range, use end of array instead */
1259 if (index >= MAX_LEGACY_SERIAL_PORTS)
1260 index = old_serial_count;
1261 /* if our index is still out of range, that mean that
1262 * array is full, we could scan for a free slot but that
1263 * make little sense to bother, just skip the port
1264 */
1265 if (index >= MAX_LEGACY_SERIAL_PORTS)
1266 goto next_port;
1267 if (index >= old_serial_count)
1268 old_serial_count = index + 1;
1269 /* Check if there is a port who already claimed our slot */
1270 if (serial_ports[index].iobase != 0) {
1271 /* if we still have some room, move it, else override */
1272 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) {
1273 DBG("Moved legacy port %d -> %d\n", index,
1274 old_serial_count);
1275 serial_ports[old_serial_count++] =
1276 serial_ports[index];
1277 } else {
1278 DBG("Replacing legacy port %d\n", index);
1279 }
1280 }
1281 }
1282 if (index >= MAX_LEGACY_SERIAL_PORTS)
1283 goto next_port;
1284 if (index >= old_serial_count)
1285 old_serial_count = index + 1;
1286
1287 /* Now fill the entry */
1288 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port));
1289 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16;
1290 serial_ports[index].iobase = reg->address;
1291 serial_ports[index].irq = interrupts ? interrupts[0] : 0;
1292 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF;
1293
1294 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
1295 index,
1296 serial_ports[index].iobase,
1297 serial_ports[index].irq,
1298 serial_ports[index].uartclk);
1299
1300 /* Get phys address of IO reg for port 1 */
1301 if (index != 0)
1302 goto next_port;
1303
1304 pci = of_get_parent(isa);
1305 if (!pci) {
1306 DBG("%s: no pci parent found\n", np->full_name);
1307 goto next_port;
1308 }
1309
1310 rangesp = (u32 *)get_property(pci, "ranges", &rlen);
1311 if (rangesp == NULL) {
1312 of_node_put(pci);
1313 goto next_port;
1314 }
1315 rlen /= 4;
1316
1317 /* we need the #size-cells of the PCI bridge node itself */
1318 phys_size = 1;
1319 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL);
1320 if (sizeprop != NULL)
1321 phys_size = *sizeprop;
1322 /* we need the parent #addr-cells */
1323 addr_size = prom_n_addr_cells(pci);
1324 rentsize = 3 + addr_size + phys_size;
1325 io_base = 0;
1326 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) {
1327 if (((rangesp[0] >> 24) & 0x3) != 1)
1328 continue; /* not IO space */
1329 io_base = rangesp[3];
1330 if (addr_size == 2)
1331 io_base = (io_base << 32) | rangesp[4];
1332 }
1333 if (io_base != 0) {
1334 *physport = io_base + reg->address;
1335 if (default_speed && spd)
1336 *default_speed = *spd;
1337 }
1338 of_node_put(pci);
1339 next_port:
1340 of_node_put(isa);
1341 }
1342
1343 DBG(" <- generic_find_legacy_serial_port()\n");
1344}
1345
1346static struct platform_device serial_device = {
1347 .name = "serial8250",
1348 .id = 0,
1349 .dev = {
1350 .platform_data = serial_ports,
1351 },
1352};
1353
1354static int __init serial_dev_init(void)
1355{
1356 return platform_device_register(&serial_device);
1357}
1358arch_initcall(serial_dev_init);
1359
1360#endif /* CONFIG_PPC_ISERIES */
1361
1362int check_legacy_ioport(unsigned long base_port)
1363{
1364 if (ppc_md.check_legacy_ioport == NULL)
1365 return 0;
1366 return ppc_md.check_legacy_ioport(base_port);
1367}
1368EXPORT_SYMBOL(check_legacy_ioport);
1369
1370#ifdef CONFIG_XMON
1371static int __init early_xmon(char *p)
1372{
1373 /* ensure xmon is enabled */
1374 if (p) {
1375 if (strncmp(p, "on", 2) == 0)
1376 xmon_init();
1377 if (strncmp(p, "early", 5) != 0)
1378 return 0;
1379 }
1380 xmon_init();
1381 debugger(NULL);
1382
1383 return 0;
1384}
1385early_param("xmon", early_xmon);
1386#endif
1387
1388void cpu_die(void)
1389{
1390 if (ppc_md.cpu_die)
1391 ppc_md.cpu_die();
1392}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 11:37:01 -0500