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-rw-r--r--arch/ppc64/kernel/setup.c1307
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diff --git a/arch/ppc64/kernel/setup.c b/arch/ppc64/kernel/setup.c
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--- a/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/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>
40#include <asm/bootinfo.h>
41#include <asm/smp.h>
42#include <asm/elf.h>
43#include <asm/machdep.h>
44#include <asm/paca.h>
45#include <asm/ppcdebug.h>
46#include <asm/time.h>
47#include <asm/cputable.h>
48#include <asm/sections.h>
49#include <asm/btext.h>
50#include <asm/nvram.h>
51#include <asm/setup.h>
52#include <asm/system.h>
53#include <asm/rtas.h>
54#include <asm/iommu.h>
55#include <asm/serial.h>
56#include <asm/cache.h>
57#include <asm/page.h>
58#include <asm/mmu.h>
59#include <asm/lmb.h>
60#include <asm/iSeries/ItLpNaca.h>
61#include <asm/firmware.h>
62
63#ifdef DEBUG
64#define DBG(fmt...) udbg_printf(fmt)
65#else
66#define DBG(fmt...)
67#endif
68
69/*
70 * Here are some early debugging facilities. You can enable one
71 * but your kernel will not boot on anything else if you do so
72 */
73
74/* This one is for use on LPAR machines that support an HVC console
75 * on vterm 0
76 */
77extern void udbg_init_debug_lpar(void);
78/* This one is for use on Apple G5 machines
79 */
80extern void udbg_init_pmac_realmode(void);
81/* That's RTAS panel debug */
82extern void call_rtas_display_status_delay(unsigned char c);
83/* Here's maple real mode debug */
84extern void udbg_init_maple_realmode(void);
85
86#define EARLY_DEBUG_INIT() do {} while(0)
87
88#if 0
89#define EARLY_DEBUG_INIT() udbg_init_debug_lpar()
90#define EARLY_DEBUG_INIT() udbg_init_maple_realmode()
91#define EARLY_DEBUG_INIT() udbg_init_pmac_realmode()
92#define EARLY_DEBUG_INIT() \
93 do { udbg_putc = call_rtas_display_status_delay; } while(0)
94#endif
95
96/* extern void *stab; */
97extern unsigned long klimit;
98
99extern void mm_init_ppc64(void);
100extern void stab_initialize(unsigned long stab);
101extern void htab_initialize(void);
102extern void early_init_devtree(void *flat_dt);
103extern void unflatten_device_tree(void);
104
105extern void smp_release_cpus(void);
106
107int have_of = 1;
108int boot_cpuid = 0;
109int boot_cpuid_phys = 0;
110dev_t boot_dev;
111u64 ppc64_pft_size;
112
113struct ppc64_caches ppc64_caches;
114EXPORT_SYMBOL_GPL(ppc64_caches);
115
116/*
117 * These are used in binfmt_elf.c to put aux entries on the stack
118 * for each elf executable being started.
119 */
120int dcache_bsize;
121int icache_bsize;
122int ucache_bsize;
123
124/* The main machine-dep calls structure
125 */
126struct machdep_calls ppc_md;
127EXPORT_SYMBOL(ppc_md);
128
129#ifdef CONFIG_MAGIC_SYSRQ
130unsigned long SYSRQ_KEY;
131#endif /* CONFIG_MAGIC_SYSRQ */
132
133
134static int ppc64_panic_event(struct notifier_block *, unsigned long, void *);
135static struct notifier_block ppc64_panic_block = {
136 .notifier_call = ppc64_panic_event,
137 .priority = INT_MIN /* may not return; must be done last */
138};
139
140/*
141 * Perhaps we can put the pmac screen_info[] here
142 * on pmac as well so we don't need the ifdef's.
143 * Until we get multiple-console support in here
144 * that is. -- Cort
145 * Maybe tie it to serial consoles, since this is really what
146 * these processors use on existing boards. -- Dan
147 */
148struct screen_info screen_info = {
149 .orig_x = 0,
150 .orig_y = 25,
151 .orig_video_cols = 80,
152 .orig_video_lines = 25,
153 .orig_video_isVGA = 1,
154 .orig_video_points = 16
155};
156
157#ifdef CONFIG_SMP
158
159static int smt_enabled_cmdline;
160
161/* Look for ibm,smt-enabled OF option */
162static void check_smt_enabled(void)
163{
164 struct device_node *dn;
165 char *smt_option;
166
167 /* Allow the command line to overrule the OF option */
168 if (smt_enabled_cmdline)
169 return;
170
171 dn = of_find_node_by_path("/options");
172
173 if (dn) {
174 smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL);
175
176 if (smt_option) {
177 if (!strcmp(smt_option, "on"))
178 smt_enabled_at_boot = 1;
179 else if (!strcmp(smt_option, "off"))
180 smt_enabled_at_boot = 0;
181 }
182 }
183}
184
185/* Look for smt-enabled= cmdline option */
186static int __init early_smt_enabled(char *p)
187{
188 smt_enabled_cmdline = 1;
189
190 if (!p)
191 return 0;
192
193 if (!strcmp(p, "on") || !strcmp(p, "1"))
194 smt_enabled_at_boot = 1;
195 else if (!strcmp(p, "off") || !strcmp(p, "0"))
196 smt_enabled_at_boot = 0;
197
198 return 0;
199}
200early_param("smt-enabled", early_smt_enabled);
201
202/**
203 * setup_cpu_maps - initialize the following cpu maps:
204 * cpu_possible_map
205 * cpu_present_map
206 * cpu_sibling_map
207 *
208 * Having the possible map set up early allows us to restrict allocations
209 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
210 *
211 * We do not initialize the online map here; cpus set their own bits in
212 * cpu_online_map as they come up.
213 *
214 * This function is valid only for Open Firmware systems. finish_device_tree
215 * must be called before using this.
216 *
217 * While we're here, we may as well set the "physical" cpu ids in the paca.
218 */
219static void __init setup_cpu_maps(void)
220{
221 struct device_node *dn = NULL;
222 int cpu = 0;
223 int swap_cpuid = 0;
224
225 check_smt_enabled();
226
227 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
228 u32 *intserv;
229 int j, len = sizeof(u32), nthreads;
230
231 intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s",
232 &len);
233 if (!intserv)
234 intserv = (u32 *)get_property(dn, "reg", NULL);
235
236 nthreads = len / sizeof(u32);
237
238 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
239 cpu_set(cpu, cpu_present_map);
240 set_hard_smp_processor_id(cpu, intserv[j]);
241
242 if (intserv[j] == boot_cpuid_phys)
243 swap_cpuid = cpu;
244 cpu_set(cpu, cpu_possible_map);
245 cpu++;
246 }
247 }
248
249 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
250 * boot cpu is logical 0.
251 */
252 if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
253 u32 tmp;
254 tmp = get_hard_smp_processor_id(0);
255 set_hard_smp_processor_id(0, boot_cpuid_phys);
256 set_hard_smp_processor_id(swap_cpuid, tmp);
257 }
258
259 /*
260 * On pSeries LPAR, we need to know how many cpus
261 * could possibly be added to this partition.
262 */
263 if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
264 (dn = of_find_node_by_path("/rtas"))) {
265 int num_addr_cell, num_size_cell, maxcpus;
266 unsigned int *ireg;
267
268 num_addr_cell = prom_n_addr_cells(dn);
269 num_size_cell = prom_n_size_cells(dn);
270
271 ireg = (unsigned int *)
272 get_property(dn, "ibm,lrdr-capacity", NULL);
273
274 if (!ireg)
275 goto out;
276
277 maxcpus = ireg[num_addr_cell + num_size_cell];
278
279 /* Double maxcpus for processors which have SMT capability */
280 if (cpu_has_feature(CPU_FTR_SMT))
281 maxcpus *= 2;
282
283 if (maxcpus > NR_CPUS) {
284 printk(KERN_WARNING
285 "Partition configured for %d cpus, "
286 "operating system maximum is %d.\n",
287 maxcpus, NR_CPUS);
288 maxcpus = NR_CPUS;
289 } else
290 printk(KERN_INFO "Partition configured for %d cpus.\n",
291 maxcpus);
292
293 for (cpu = 0; cpu < maxcpus; cpu++)
294 cpu_set(cpu, cpu_possible_map);
295 out:
296 of_node_put(dn);
297 }
298
299 /*
300 * Do the sibling map; assume only two threads per processor.
301 */
302 for_each_cpu(cpu) {
303 cpu_set(cpu, cpu_sibling_map[cpu]);
304 if (cpu_has_feature(CPU_FTR_SMT))
305 cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
306 }
307
308 systemcfg->processorCount = num_present_cpus();
309}
310#endif /* CONFIG_SMP */
311
312extern struct machdep_calls pSeries_md;
313extern struct machdep_calls pmac_md;
314extern struct machdep_calls maple_md;
315extern struct machdep_calls bpa_md;
316extern struct machdep_calls iseries_md;
317
318/* Ultimately, stuff them in an elf section like initcalls... */
319static struct machdep_calls __initdata *machines[] = {
320#ifdef CONFIG_PPC_PSERIES
321 &pSeries_md,
322#endif /* CONFIG_PPC_PSERIES */
323#ifdef CONFIG_PPC_PMAC
324 &pmac_md,
325#endif /* CONFIG_PPC_PMAC */
326#ifdef CONFIG_PPC_MAPLE
327 &maple_md,
328#endif /* CONFIG_PPC_MAPLE */
329#ifdef CONFIG_PPC_BPA
330 &bpa_md,
331#endif
332#ifdef CONFIG_PPC_ISERIES
333 &iseries_md,
334#endif
335 NULL
336};
337
338/*
339 * Early initialization entry point. This is called by head.S
340 * with MMU translation disabled. We rely on the "feature" of
341 * the CPU that ignores the top 2 bits of the address in real
342 * mode so we can access kernel globals normally provided we
343 * only toy with things in the RMO region. From here, we do
344 * some early parsing of the device-tree to setup out LMB
345 * data structures, and allocate & initialize the hash table
346 * and segment tables so we can start running with translation
347 * enabled.
348 *
349 * It is this function which will call the probe() callback of
350 * the various platform types and copy the matching one to the
351 * global ppc_md structure. Your platform can eventually do
352 * some very early initializations from the probe() routine, but
353 * this is not recommended, be very careful as, for example, the
354 * device-tree is not accessible via normal means at this point.
355 */
356
357void __init early_setup(unsigned long dt_ptr)
358{
359 struct paca_struct *lpaca = get_paca();
360 static struct machdep_calls **mach;
361
362 /*
363 * Enable early debugging if any specified (see top of
364 * this file)
365 */
366 EARLY_DEBUG_INIT();
367
368 DBG(" -> early_setup()\n");
369
370 /*
371 * Fill the default DBG level (do we want to keep
372 * that old mecanism around forever ?)
373 */
374 ppcdbg_initialize();
375
376 /*
377 * Do early initializations using the flattened device
378 * tree, like retreiving the physical memory map or
379 * calculating/retreiving the hash table size
380 */
381 early_init_devtree(__va(dt_ptr));
382
383 /*
384 * Iterate all ppc_md structures until we find the proper
385 * one for the current machine type
386 */
387 DBG("Probing machine type for platform %x...\n",
388 systemcfg->platform);
389
390 for (mach = machines; *mach; mach++) {
391 if ((*mach)->probe(systemcfg->platform))
392 break;
393 }
394 /* What can we do if we didn't find ? */
395 if (*mach == NULL) {
396 DBG("No suitable machine found !\n");
397 for (;;);
398 }
399 ppc_md = **mach;
400
401 DBG("Found, Initializing memory management...\n");
402
403 /*
404 * Initialize stab / SLB management
405 */
406 if (!firmware_has_feature(FW_FEATURE_ISERIES))
407 stab_initialize(lpaca->stab_real);
408
409 /*
410 * Initialize the MMU Hash table and create the linear mapping
411 * of memory
412 */
413 htab_initialize();
414
415 DBG(" <- early_setup()\n");
416}
417
418
419/*
420 * Initialize some remaining members of the ppc64_caches and systemcfg structures
421 * (at least until we get rid of them completely). This is mostly some
422 * cache informations about the CPU that will be used by cache flush
423 * routines and/or provided to userland
424 */
425static void __init initialize_cache_info(void)
426{
427 struct device_node *np;
428 unsigned long num_cpus = 0;
429
430 DBG(" -> initialize_cache_info()\n");
431
432 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) {
433 num_cpus += 1;
434
435 /* We're assuming *all* of the CPUs have the same
436 * d-cache and i-cache sizes... -Peter
437 */
438
439 if ( num_cpus == 1 ) {
440 u32 *sizep, *lsizep;
441 u32 size, lsize;
442 const char *dc, *ic;
443
444 /* Then read cache informations */
445 if (systemcfg->platform == PLATFORM_POWERMAC) {
446 dc = "d-cache-block-size";
447 ic = "i-cache-block-size";
448 } else {
449 dc = "d-cache-line-size";
450 ic = "i-cache-line-size";
451 }
452
453 size = 0;
454 lsize = cur_cpu_spec->dcache_bsize;
455 sizep = (u32 *)get_property(np, "d-cache-size", NULL);
456 if (sizep != NULL)
457 size = *sizep;
458 lsizep = (u32 *) get_property(np, dc, NULL);
459 if (lsizep != NULL)
460 lsize = *lsizep;
461 if (sizep == 0 || lsizep == 0)
462 DBG("Argh, can't find dcache properties ! "
463 "sizep: %p, lsizep: %p\n", sizep, lsizep);
464
465 systemcfg->dcache_size = ppc64_caches.dsize = size;
466 systemcfg->dcache_line_size =
467 ppc64_caches.dline_size = lsize;
468 ppc64_caches.log_dline_size = __ilog2(lsize);
469 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize;
470
471 size = 0;
472 lsize = cur_cpu_spec->icache_bsize;
473 sizep = (u32 *)get_property(np, "i-cache-size", NULL);
474 if (sizep != NULL)
475 size = *sizep;
476 lsizep = (u32 *)get_property(np, ic, NULL);
477 if (lsizep != NULL)
478 lsize = *lsizep;
479 if (sizep == 0 || lsizep == 0)
480 DBG("Argh, can't find icache properties ! "
481 "sizep: %p, lsizep: %p\n", sizep, lsizep);
482
483 systemcfg->icache_size = ppc64_caches.isize = size;
484 systemcfg->icache_line_size =
485 ppc64_caches.iline_size = lsize;
486 ppc64_caches.log_iline_size = __ilog2(lsize);
487 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize;
488 }
489 }
490
491 /* Add an eye catcher and the systemcfg layout version number */
492 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
493 systemcfg->version.major = SYSTEMCFG_MAJOR;
494 systemcfg->version.minor = SYSTEMCFG_MINOR;
495 systemcfg->processor = mfspr(SPRN_PVR);
496
497 DBG(" <- initialize_cache_info()\n");
498}
499
500static void __init check_for_initrd(void)
501{
502#ifdef CONFIG_BLK_DEV_INITRD
503 u64 *prop;
504
505 DBG(" -> check_for_initrd()\n");
506
507 if (of_chosen) {
508 prop = (u64 *)get_property(of_chosen,
509 "linux,initrd-start", NULL);
510 if (prop != NULL) {
511 initrd_start = (unsigned long)__va(*prop);
512 prop = (u64 *)get_property(of_chosen,
513 "linux,initrd-end", NULL);
514 if (prop != NULL) {
515 initrd_end = (unsigned long)__va(*prop);
516 initrd_below_start_ok = 1;
517 } else
518 initrd_start = 0;
519 }
520 }
521
522 /* If we were passed an initrd, set the ROOT_DEV properly if the values
523 * look sensible. If not, clear initrd reference.
524 */
525 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
526 initrd_end > initrd_start)
527 ROOT_DEV = Root_RAM0;
528 else
529 initrd_start = initrd_end = 0;
530
531 if (initrd_start)
532 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
533
534 DBG(" <- check_for_initrd()\n");
535#endif /* CONFIG_BLK_DEV_INITRD */
536}
537
538/*
539 * Do some initial setup of the system. The parameters are those which
540 * were passed in from the bootloader.
541 */
542void __init setup_system(void)
543{
544 DBG(" -> setup_system()\n");
545
546 /*
547 * Unflatten the device-tree passed by prom_init or kexec
548 */
549 unflatten_device_tree();
550
551 /*
552 * Fill the ppc64_caches & systemcfg structures with informations
553 * retreived from the device-tree. Need to be called before
554 * finish_device_tree() since the later requires some of the
555 * informations filled up here to properly parse the interrupt
556 * tree.
557 * It also sets up the cache line sizes which allows to call
558 * routines like flush_icache_range (used by the hash init
559 * later on).
560 */
561 initialize_cache_info();
562
563#ifdef CONFIG_PPC_RTAS
564 /*
565 * Initialize RTAS if available
566 */
567 rtas_initialize();
568#endif /* CONFIG_PPC_RTAS */
569
570 /*
571 * Check if we have an initrd provided via the device-tree
572 */
573 check_for_initrd();
574
575 /*
576 * Do some platform specific early initializations, that includes
577 * setting up the hash table pointers. It also sets up some interrupt-mapping
578 * related options that will be used by finish_device_tree()
579 */
580 ppc_md.init_early();
581
582 /*
583 * "Finish" the device-tree, that is do the actual parsing of
584 * some of the properties like the interrupt map
585 */
586 finish_device_tree();
587
588#ifdef CONFIG_BOOTX_TEXT
589 init_boot_display();
590#endif
591
592 /*
593 * Initialize xmon
594 */
595#ifdef CONFIG_XMON_DEFAULT
596 xmon_init(1);
597#endif
598 /*
599 * Register early console
600 */
601 register_early_udbg_console();
602
603 /* Save unparsed command line copy for /proc/cmdline */
604 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
605
606 parse_early_param();
607
608#ifdef CONFIG_SMP
609 /*
610 * iSeries has already initialized the cpu maps at this point.
611 */
612 setup_cpu_maps();
613
614 /* Release secondary cpus out of their spinloops at 0x60 now that
615 * we can map physical -> logical CPU ids
616 */
617 smp_release_cpus();
618#endif
619
620 printk("Starting Linux PPC64 %s\n", system_utsname.version);
621
622 printk("-----------------------------------------------------\n");
623 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size);
624 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch);
625 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller);
626 printk("systemcfg = 0x%p\n", systemcfg);
627 printk("systemcfg->platform = 0x%x\n", systemcfg->platform);
628 printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount);
629 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize);
630 printk("ppc64_caches.dcache_line_size = 0x%x\n",
631 ppc64_caches.dline_size);
632 printk("ppc64_caches.icache_line_size = 0x%x\n",
633 ppc64_caches.iline_size);
634 printk("htab_address = 0x%p\n", htab_address);
635 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask);
636 printk("-----------------------------------------------------\n");
637
638 mm_init_ppc64();
639
640 DBG(" <- setup_system()\n");
641}
642
643/* also used by kexec */
644void machine_shutdown(void)
645{
646 if (ppc_md.nvram_sync)
647 ppc_md.nvram_sync();
648}
649
650void machine_restart(char *cmd)
651{
652 machine_shutdown();
653 ppc_md.restart(cmd);
654#ifdef CONFIG_SMP
655 smp_send_stop();
656#endif
657 printk(KERN_EMERG "System Halted, OK to turn off power\n");
658 local_irq_disable();
659 while (1) ;
660}
661
662void machine_power_off(void)
663{
664 machine_shutdown();
665 ppc_md.power_off();
666#ifdef CONFIG_SMP
667 smp_send_stop();
668#endif
669 printk(KERN_EMERG "System Halted, OK to turn off power\n");
670 local_irq_disable();
671 while (1) ;
672}
673/* Used by the G5 thermal driver */
674EXPORT_SYMBOL_GPL(machine_power_off);
675
676void machine_halt(void)
677{
678 machine_shutdown();
679 ppc_md.halt();
680#ifdef CONFIG_SMP
681 smp_send_stop();
682#endif
683 printk(KERN_EMERG "System Halted, OK to turn off power\n");
684 local_irq_disable();
685 while (1) ;
686}
687
688static int ppc64_panic_event(struct notifier_block *this,
689 unsigned long event, void *ptr)
690{
691 ppc_md.panic((char *)ptr); /* May not return */
692 return NOTIFY_DONE;
693}
694
695
696#ifdef CONFIG_SMP
697DEFINE_PER_CPU(unsigned int, pvr);
698#endif
699
700static int show_cpuinfo(struct seq_file *m, void *v)
701{
702 unsigned long cpu_id = (unsigned long)v - 1;
703 unsigned int pvr;
704 unsigned short maj;
705 unsigned short min;
706
707 if (cpu_id == NR_CPUS) {
708 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
709
710 if (ppc_md.show_cpuinfo != NULL)
711 ppc_md.show_cpuinfo(m);
712
713 return 0;
714 }
715
716 /* We only show online cpus: disable preempt (overzealous, I
717 * knew) to prevent cpu going down. */
718 preempt_disable();
719 if (!cpu_online(cpu_id)) {
720 preempt_enable();
721 return 0;
722 }
723
724#ifdef CONFIG_SMP
725 pvr = per_cpu(pvr, cpu_id);
726#else
727 pvr = mfspr(SPRN_PVR);
728#endif
729 maj = (pvr >> 8) & 0xFF;
730 min = pvr & 0xFF;
731
732 seq_printf(m, "processor\t: %lu\n", cpu_id);
733 seq_printf(m, "cpu\t\t: ");
734
735 if (cur_cpu_spec->pvr_mask)
736 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
737 else
738 seq_printf(m, "unknown (%08x)", pvr);
739
740#ifdef CONFIG_ALTIVEC
741 if (cpu_has_feature(CPU_FTR_ALTIVEC))
742 seq_printf(m, ", altivec supported");
743#endif /* CONFIG_ALTIVEC */
744
745 seq_printf(m, "\n");
746
747 /*
748 * Assume here that all clock rates are the same in a
749 * smp system. -- Cort
750 */
751 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000,
752 ppc_proc_freq % 1000000);
753
754 seq_printf(m, "revision\t: %hd.%hd\n\n", maj, min);
755
756 preempt_enable();
757 return 0;
758}
759
760static void *c_start(struct seq_file *m, loff_t *pos)
761{
762 return *pos <= NR_CPUS ? (void *)((*pos)+1) : NULL;
763}
764static void *c_next(struct seq_file *m, void *v, loff_t *pos)
765{
766 ++*pos;
767 return c_start(m, pos);
768}
769static void c_stop(struct seq_file *m, void *v)
770{
771}
772struct seq_operations cpuinfo_op = {
773 .start =c_start,
774 .next = c_next,
775 .stop = c_stop,
776 .show = show_cpuinfo,
777};
778
779/*
780 * These three variables are used to save values passed to us by prom_init()
781 * via the device tree. The TCE variables are needed because with a memory_limit
782 * in force we may need to explicitly map the TCE are at the top of RAM.
783 */
784unsigned long memory_limit;
785unsigned long tce_alloc_start;
786unsigned long tce_alloc_end;
787
788#ifdef CONFIG_PPC_ISERIES
789/*
790 * On iSeries we just parse the mem=X option from the command line.
791 * On pSeries it's a bit more complicated, see prom_init_mem()
792 */
793static int __init early_parsemem(char *p)
794{
795 if (!p)
796 return 0;
797
798 memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE);
799
800 return 0;
801}
802early_param("mem", early_parsemem);
803#endif /* CONFIG_PPC_ISERIES */
804
805#ifdef CONFIG_PPC_MULTIPLATFORM
806static int __init set_preferred_console(void)
807{
808 struct device_node *prom_stdout = NULL;
809 char *name;
810 u32 *spd;
811 int offset = 0;
812
813 DBG(" -> set_preferred_console()\n");
814
815 /* The user has requested a console so this is already set up. */
816 if (strstr(saved_command_line, "console=")) {
817 DBG(" console was specified !\n");
818 return -EBUSY;
819 }
820
821 if (!of_chosen) {
822 DBG(" of_chosen is NULL !\n");
823 return -ENODEV;
824 }
825 /* We are getting a weird phandle from OF ... */
826 /* ... So use the full path instead */
827 name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
828 if (name == NULL) {
829 DBG(" no linux,stdout-path !\n");
830 return -ENODEV;
831 }
832 prom_stdout = of_find_node_by_path(name);
833 if (!prom_stdout) {
834 DBG(" can't find stdout package %s !\n", name);
835 return -ENODEV;
836 }
837 DBG("stdout is %s\n", prom_stdout->full_name);
838
839 name = (char *)get_property(prom_stdout, "name", NULL);
840 if (!name) {
841 DBG(" stdout package has no name !\n");
842 goto not_found;
843 }
844 spd = (u32 *)get_property(prom_stdout, "current-speed", NULL);
845
846 if (0)
847 ;
848#ifdef CONFIG_SERIAL_8250_CONSOLE
849 else if (strcmp(name, "serial") == 0) {
850 int i;
851 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
852 if (i > 8) {
853 switch (reg[1]) {
854 case 0x3f8:
855 offset = 0;
856 break;
857 case 0x2f8:
858 offset = 1;
859 break;
860 case 0x898:
861 offset = 2;
862 break;
863 case 0x890:
864 offset = 3;
865 break;
866 default:
867 /* We dont recognise the serial port */
868 goto not_found;
869 }
870 }
871 }
872#endif /* CONFIG_SERIAL_8250_CONSOLE */
873#ifdef CONFIG_PPC_PSERIES
874 else if (strcmp(name, "vty") == 0) {
875 u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL);
876 char *compat = (char *)get_property(prom_stdout, "compatible", NULL);
877
878 if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
879 /* Host Virtual Serial Interface */
880 int offset;
881 switch (reg[0]) {
882 case 0x30000000:
883 offset = 0;
884 break;
885 case 0x30000001:
886 offset = 1;
887 break;
888 default:
889 goto not_found;
890 }
891 of_node_put(prom_stdout);
892 DBG("Found hvsi console at offset %d\n", offset);
893 return add_preferred_console("hvsi", offset, NULL);
894 } else {
895 /* pSeries LPAR virtual console */
896 of_node_put(prom_stdout);
897 DBG("Found hvc console\n");
898 return add_preferred_console("hvc", 0, NULL);
899 }
900 }
901#endif /* CONFIG_PPC_PSERIES */
902#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
903 else if (strcmp(name, "ch-a") == 0)
904 offset = 0;
905 else if (strcmp(name, "ch-b") == 0)
906 offset = 1;
907#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
908 else
909 goto not_found;
910 of_node_put(prom_stdout);
911
912 DBG("Found serial console at ttyS%d\n", offset);
913
914 if (spd) {
915 static char __initdata opt[16];
916 sprintf(opt, "%d", *spd);
917 return add_preferred_console("ttyS", offset, opt);
918 } else
919 return add_preferred_console("ttyS", offset, NULL);
920
921 not_found:
922 DBG("No preferred console found !\n");
923 of_node_put(prom_stdout);
924 return -ENODEV;
925}
926console_initcall(set_preferred_console);
927#endif /* CONFIG_PPC_MULTIPLATFORM */
928
929#ifdef CONFIG_IRQSTACKS
930static void __init irqstack_early_init(void)
931{
932 unsigned int i;
933
934 /*
935 * interrupt stacks must be under 256MB, we cannot afford to take
936 * SLB misses on them.
937 */
938 for_each_cpu(i) {
939 softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
940 THREAD_SIZE, 0x10000000));
941 hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
942 THREAD_SIZE, 0x10000000));
943 }
944}
945#else
946#define irqstack_early_init()
947#endif
948
949/*
950 * Stack space used when we detect a bad kernel stack pointer, and
951 * early in SMP boots before relocation is enabled.
952 */
953static void __init emergency_stack_init(void)
954{
955 unsigned long limit;
956 unsigned int i;
957
958 /*
959 * Emergency stacks must be under 256MB, we cannot afford to take
960 * SLB misses on them. The ABI also requires them to be 128-byte
961 * aligned.
962 *
963 * Since we use these as temporary stacks during secondary CPU
964 * bringup, we need to get at them in real mode. This means they
965 * must also be within the RMO region.
966 */
967 limit = min(0x10000000UL, lmb.rmo_size);
968
969 for_each_cpu(i)
970 paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128,
971 limit)) + PAGE_SIZE;
972}
973
974/*
975 * Called from setup_arch to initialize the bitmap of available
976 * syscalls in the systemcfg page
977 */
978void __init setup_syscall_map(void)
979{
980 unsigned int i, count64 = 0, count32 = 0;
981 extern unsigned long *sys_call_table;
982 extern unsigned long *sys_call_table32;
983 extern unsigned long sys_ni_syscall;
984
985
986 for (i = 0; i < __NR_syscalls; i++) {
987 if (sys_call_table[i] == sys_ni_syscall)
988 continue;
989 count64++;
990 systemcfg->syscall_map_64[i >> 5] |= 0x80000000UL >> (i & 0x1f);
991 }
992 for (i = 0; i < __NR_syscalls; i++) {
993 if (sys_call_table32[i] == sys_ni_syscall)
994 continue;
995 count32++;
996 systemcfg->syscall_map_32[i >> 5] |= 0x80000000UL >> (i & 0x1f);
997 }
998 printk(KERN_INFO "Syscall map setup, %d 32 bits and %d 64 bits syscalls\n",
999 count32, count64);
1000}
1001
1002/*
1003 * Called into from start_kernel, after lock_kernel has been called.
1004 * Initializes bootmem, which is unsed to manage page allocation until
1005 * mem_init is called.
1006 */
1007void __init setup_arch(char **cmdline_p)
1008{
1009 extern void do_init_bootmem(void);
1010
1011 ppc64_boot_msg(0x12, "Setup Arch");
1012
1013 *cmdline_p = cmd_line;
1014
1015 /*
1016 * Set cache line size based on type of cpu as a default.
1017 * Systems with OF can look in the properties on the cpu node(s)
1018 * for a possibly more accurate value.
1019 */
1020 dcache_bsize = ppc64_caches.dline_size;
1021 icache_bsize = ppc64_caches.iline_size;
1022
1023 /* reboot on panic */
1024 panic_timeout = 180;
1025
1026 if (ppc_md.panic)
1027 notifier_chain_register(&panic_notifier_list, &ppc64_panic_block);
1028
1029 init_mm.start_code = PAGE_OFFSET;
1030 init_mm.end_code = (unsigned long) _etext;
1031 init_mm.end_data = (unsigned long) _edata;
1032 init_mm.brk = klimit;
1033
1034 irqstack_early_init();
1035 emergency_stack_init();
1036
1037 stabs_alloc();
1038
1039 /* set up the bootmem stuff with available memory */
1040 do_init_bootmem();
1041 sparse_init();
1042
1043 /* initialize the syscall map in systemcfg */
1044 setup_syscall_map();
1045
1046#ifdef CONFIG_DUMMY_CONSOLE
1047 conswitchp = &dummy_con;
1048#endif
1049
1050 ppc_md.setup_arch();
1051
1052 /* Use the default idle loop if the platform hasn't provided one. */
1053 if (NULL == ppc_md.idle_loop) {
1054 ppc_md.idle_loop = default_idle;
1055 printk(KERN_INFO "Using default idle loop\n");
1056 }
1057
1058 paging_init();
1059 ppc64_boot_msg(0x15, "Setup Done");
1060}
1061
1062
1063/* ToDo: do something useful if ppc_md is not yet setup. */
1064#define PPC64_LINUX_FUNCTION 0x0f000000
1065#define PPC64_IPL_MESSAGE 0xc0000000
1066#define PPC64_TERM_MESSAGE 0xb0000000
1067
1068static void ppc64_do_msg(unsigned int src, const char *msg)
1069{
1070 if (ppc_md.progress) {
1071 char buf[128];
1072
1073 sprintf(buf, "%08X\n", src);
1074 ppc_md.progress(buf, 0);
1075 snprintf(buf, 128, "%s", msg);
1076 ppc_md.progress(buf, 0);
1077 }
1078}
1079
1080/* Print a boot progress message. */
1081void ppc64_boot_msg(unsigned int src, const char *msg)
1082{
1083 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg);
1084 printk("[boot]%04x %s\n", src, msg);
1085}
1086
1087/* Print a termination message (print only -- does not stop the kernel) */
1088void ppc64_terminate_msg(unsigned int src, const char *msg)
1089{
1090 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg);
1091 printk("[terminate]%04x %s\n", src, msg);
1092}
1093
1094#ifndef CONFIG_PPC_ISERIES
1095/*
1096 * This function can be used by platforms to "find" legacy serial ports.
1097 * It works for "serial" nodes under an "isa" node, and will try to
1098 * respect the "ibm,aix-loc" property if any. It works with up to 8
1099 * ports.
1100 */
1101
1102#define MAX_LEGACY_SERIAL_PORTS 8
1103static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
1104static unsigned int old_serial_count;
1105
1106void __init generic_find_legacy_serial_ports(u64 *physport,
1107 unsigned int *default_speed)
1108{
1109 struct device_node *np;
1110 u32 *sizeprop;
1111
1112 struct isa_reg_property {
1113 u32 space;
1114 u32 address;
1115 u32 size;
1116 };
1117 struct pci_reg_property {
1118 struct pci_address addr;
1119 u32 size_hi;
1120 u32 size_lo;
1121 };
1122
1123 DBG(" -> generic_find_legacy_serial_port()\n");
1124
1125 *physport = 0;
1126 if (default_speed)
1127 *default_speed = 0;
1128
1129 np = of_find_node_by_path("/");
1130 if (!np)
1131 return;
1132
1133 /* First fill our array */
1134 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
1135 struct device_node *isa, *pci;
1136 struct isa_reg_property *reg;
1137 unsigned long phys_size, addr_size, io_base;
1138 u32 *rangesp;
1139 u32 *interrupts, *clk, *spd;
1140 char *typep;
1141 int index, rlen, rentsize;
1142
1143 /* Ok, first check if it's under an "isa" parent */
1144 isa = of_get_parent(np);
1145 if (!isa || strcmp(isa->name, "isa")) {
1146 DBG("%s: no isa parent found\n", np->full_name);
1147 continue;
1148 }
1149
1150 /* Now look for an "ibm,aix-loc" property that gives us ordering
1151 * if any...
1152 */
1153 typep = (char *)get_property(np, "ibm,aix-loc", NULL);
1154
1155 /* Get the ISA port number */
1156 reg = (struct isa_reg_property *)get_property(np, "reg", NULL);
1157 if (reg == NULL)
1158 goto next_port;
1159 /* We assume the interrupt number isn't translated ... */
1160 interrupts = (u32 *)get_property(np, "interrupts", NULL);
1161 /* get clock freq. if present */
1162 clk = (u32 *)get_property(np, "clock-frequency", NULL);
1163 /* get default speed if present */
1164 spd = (u32 *)get_property(np, "current-speed", NULL);
1165 /* Default to locate at end of array */
1166 index = old_serial_count; /* end of the array by default */
1167
1168 /* If we have a location index, then use it */
1169 if (typep && *typep == 'S') {
1170 index = simple_strtol(typep+1, NULL, 0) - 1;
1171 /* if index is out of range, use end of array instead */
1172 if (index >= MAX_LEGACY_SERIAL_PORTS)
1173 index = old_serial_count;
1174 /* if our index is still out of range, that mean that
1175 * array is full, we could scan for a free slot but that
1176 * make little sense to bother, just skip the port
1177 */
1178 if (index >= MAX_LEGACY_SERIAL_PORTS)
1179 goto next_port;
1180 if (index >= old_serial_count)
1181 old_serial_count = index + 1;
1182 /* Check if there is a port who already claimed our slot */
1183 if (serial_ports[index].iobase != 0) {
1184 /* if we still have some room, move it, else override */
1185 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) {
1186 DBG("Moved legacy port %d -> %d\n", index,
1187 old_serial_count);
1188 serial_ports[old_serial_count++] =
1189 serial_ports[index];
1190 } else {
1191 DBG("Replacing legacy port %d\n", index);
1192 }
1193 }
1194 }
1195 if (index >= MAX_LEGACY_SERIAL_PORTS)
1196 goto next_port;
1197 if (index >= old_serial_count)
1198 old_serial_count = index + 1;
1199
1200 /* Now fill the entry */
1201 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port));
1202 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16;
1203 serial_ports[index].iobase = reg->address;
1204 serial_ports[index].irq = interrupts ? interrupts[0] : 0;
1205 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF;
1206
1207 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
1208 index,
1209 serial_ports[index].iobase,
1210 serial_ports[index].irq,
1211 serial_ports[index].uartclk);
1212
1213 /* Get phys address of IO reg for port 1 */
1214 if (index != 0)
1215 goto next_port;
1216
1217 pci = of_get_parent(isa);
1218 if (!pci) {
1219 DBG("%s: no pci parent found\n", np->full_name);
1220 goto next_port;
1221 }
1222
1223 rangesp = (u32 *)get_property(pci, "ranges", &rlen);
1224 if (rangesp == NULL) {
1225 of_node_put(pci);
1226 goto next_port;
1227 }
1228 rlen /= 4;
1229
1230 /* we need the #size-cells of the PCI bridge node itself */
1231 phys_size = 1;
1232 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL);
1233 if (sizeprop != NULL)
1234 phys_size = *sizeprop;
1235 /* we need the parent #addr-cells */
1236 addr_size = prom_n_addr_cells(pci);
1237 rentsize = 3 + addr_size + phys_size;
1238 io_base = 0;
1239 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) {
1240 if (((rangesp[0] >> 24) & 0x3) != 1)
1241 continue; /* not IO space */
1242 io_base = rangesp[3];
1243 if (addr_size == 2)
1244 io_base = (io_base << 32) | rangesp[4];
1245 }
1246 if (io_base != 0) {
1247 *physport = io_base + reg->address;
1248 if (default_speed && spd)
1249 *default_speed = *spd;
1250 }
1251 of_node_put(pci);
1252 next_port:
1253 of_node_put(isa);
1254 }
1255
1256 DBG(" <- generic_find_legacy_serial_port()\n");
1257}
1258
1259static struct platform_device serial_device = {
1260 .name = "serial8250",
1261 .id = PLAT8250_DEV_PLATFORM,
1262 .dev = {
1263 .platform_data = serial_ports,
1264 },
1265};
1266
1267static int __init serial_dev_init(void)
1268{
1269 return platform_device_register(&serial_device);
1270}
1271arch_initcall(serial_dev_init);
1272
1273#endif /* CONFIG_PPC_ISERIES */
1274
1275int check_legacy_ioport(unsigned long base_port)
1276{
1277 if (ppc_md.check_legacy_ioport == NULL)
1278 return 0;
1279 return ppc_md.check_legacy_ioport(base_port);
1280}
1281EXPORT_SYMBOL(check_legacy_ioport);
1282
1283#ifdef CONFIG_XMON
1284static int __init early_xmon(char *p)
1285{
1286 /* ensure xmon is enabled */
1287 if (p) {
1288 if (strncmp(p, "on", 2) == 0)
1289 xmon_init(1);
1290 if (strncmp(p, "off", 3) == 0)
1291 xmon_init(0);
1292 if (strncmp(p, "early", 5) != 0)
1293 return 0;
1294 }
1295 xmon_init(1);
1296 debugger(NULL);
1297
1298 return 0;
1299}
1300early_param("xmon", early_xmon);
1301#endif
1302
1303void cpu_die(void)
1304{
1305 if (ppc_md.cpu_die)
1306 ppc_md.cpu_die();
1307}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 08:53:00 -0500