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[S390] Add vmpanic parameter.
[net-next-2.6.git] / arch / s390 / kernel / setup.c
CommitLineData
1da177e4
LT		 1/*
2 * arch/s390/kernel/setup.c
3 *
4 * S390 version
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Hartmut Penner (hp@de.ibm.com),
7 * Martin Schwidefsky (schwidefsky@de.ibm.com)
8 *
9 * Derived from "arch/i386/kernel/setup.c"
10 * Copyright (C) 1995, Linus Torvalds
11 */
12
13/*
14 * This file handles the architecture-dependent parts of initialization
15 */
16
17#include <linux/errno.h>
18#include <linux/module.h>
19#include <linux/sched.h>
20#include <linux/kernel.h>
21#include <linux/mm.h>
22#include <linux/stddef.h>
23#include <linux/unistd.h>
24#include <linux/ptrace.h>
25#include <linux/slab.h>
26#include <linux/user.h>
27#include <linux/a.out.h>
28#include <linux/tty.h>
29#include <linux/ioport.h>
30#include <linux/delay.h>
31#include <linux/config.h>
32#include <linux/init.h>
33#include <linux/initrd.h>
34#include <linux/bootmem.h>
35#include <linux/root_dev.h>
36#include <linux/console.h>
37#include <linux/seq_file.h>
38#include <linux/kernel_stat.h>
1e8e3383 39#include <linux/device.h>
585c3047 40#include <linux/notifier.h>
1da177e4
LT		 41
42#include <asm/uaccess.h>
43#include <asm/system.h>
44#include <asm/smp.h>
45#include <asm/mmu_context.h>
46#include <asm/cpcmd.h>
47#include <asm/lowcore.h>
48#include <asm/irq.h>
0b642ede
PO		 49#include <asm/page.h>
50#include <asm/ptrace.h>
cc13ad62 51#include <asm/sections.h>
1da177e4
LT		 52
53/*
54 * Machine setup..
55 */
56unsigned int console_mode = 0;
57unsigned int console_devno = -1;
58unsigned int console_irq = -1;
59unsigned long memory_size = 0;
60unsigned long machine_flags = 0;
1da177e4
LT		 61struct {
62 unsigned long addr, size, type;
63} memory_chunk[MEMORY_CHUNKS] = { { 0 } };
64#define CHUNK_READ_WRITE 0
65#define CHUNK_READ_ONLY 1
66volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
c9e37353
HC		 67unsigned long __initdata zholes_size[MAX_NR_ZONES];
68static unsigned long __initdata memory_end;
1da177e4 69
1da177e4
LT		 70/*
71 * This is set up by the setup-routine at boot-time
72 * for S390 need to find out, what we have to setup
73 * using address 0x10400 ...
74 */
75
76#include <asm/setup.h>
77
1da177e4
LT		 78static struct resource code_resource = {
79 .name = "Kernel code",
80 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
81};
82
83static struct resource data_resource = {
84 .name = "Kernel data",
85 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
86};
87
88/*
89 * cpu_init() initializes state that is per-CPU.
90 */
91void __devinit cpu_init (void)
92{
93 int addr = hard_smp_processor_id();
94
95 /*
96 * Store processor id in lowcore (used e.g. in timer_interrupt)
97 */
98 asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));
99 S390_lowcore.cpu_data.cpu_addr = addr;
100
101 /*
102 * Force FPU initialization:
103 */
104 clear_thread_flag(TIF_USEDFPU);
105 clear_used_math();
106
107 atomic_inc(&init_mm.mm_count);
108 current->active_mm = &init_mm;
109 if (current->mm)
110 BUG();
111 enter_lazy_tlb(&init_mm, current);
112}
113
114/*
115 * VM halt and poweroff setup routines
116 */
117char vmhalt_cmd[128] = "";
118char vmpoff_cmd[128] = "";
585c3047 119char vmpanic_cmd[128] = "";
1da177e4
LT		 120
121static inline void strncpy_skip_quote(char *dst, char *src, int n)
122{
123 int sx, dx;
124
125 dx = 0;
126 for (sx = 0; src[sx] != 0; sx++) {
127 if (src[sx] == '"') continue;
128 dst[dx++] = src[sx];
129 if (dx >= n) break;
130 }
131}
132
133static int __init vmhalt_setup(char *str)
134{
135 strncpy_skip_quote(vmhalt_cmd, str, 127);
136 vmhalt_cmd[127] = 0;
137 return 1;
138}
139
140__setup("vmhalt=", vmhalt_setup);
141
142static int __init vmpoff_setup(char *str)
143{
144 strncpy_skip_quote(vmpoff_cmd, str, 127);
145 vmpoff_cmd[127] = 0;
146 return 1;
147}
148
149__setup("vmpoff=", vmpoff_setup);
150
585c3047
PO		 151static int vmpanic_notify(struct notifier_block *self, unsigned long event,
152 void *data)
153{
154 if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0)
155 cpcmd(vmpanic_cmd, NULL, 0, NULL);
156
157 return NOTIFY_OK;
158}
159
160#define PANIC_PRI_VMPANIC 0
161
162static struct notifier_block vmpanic_nb = {
163 .notifier_call = vmpanic_notify,
164 .priority = PANIC_PRI_VMPANIC
165};
166
167static int __init vmpanic_setup(char *str)
168{
169 static int register_done __initdata = 0;
170
171 strncpy_skip_quote(vmpanic_cmd, str, 127);
172 vmpanic_cmd[127] = 0;
173 if (!register_done) {
174 register_done = 1;
175 atomic_notifier_chain_register(&panic_notifier_list,
176 &vmpanic_nb);
177 }
178 return 1;
179}
180
181__setup("vmpanic=", vmpanic_setup);
182
1da177e4
LT		 183/*
184 * condev= and conmode= setup parameter.
185 */
186
187static int __init condev_setup(char *str)
188{
189 int vdev;
190
191 vdev = simple_strtoul(str, &str, 0);
192 if (vdev >= 0 && vdev < 65536) {
193 console_devno = vdev;
194 console_irq = -1;
195 }
196 return 1;
197}
198
199__setup("condev=", condev_setup);
200
201static int __init conmode_setup(char *str)
202{
203#if defined(CONFIG_SCLP_CONSOLE)
204 if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0)
205 SET_CONSOLE_SCLP;
206#endif
207#if defined(CONFIG_TN3215_CONSOLE)
208 if (strncmp(str, "3215", 5) == 0)
209 SET_CONSOLE_3215;
210#endif
211#if defined(CONFIG_TN3270_CONSOLE)
212 if (strncmp(str, "3270", 5) == 0)
213 SET_CONSOLE_3270;
214#endif
215 return 1;
216}
217
218__setup("conmode=", conmode_setup);
219
220static void __init conmode_default(void)
221{
222 char query_buffer[1024];
223 char *ptr;
224
225 if (MACHINE_IS_VM) {
6b979de3 226 __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
1da177e4
LT		 227 console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
228 ptr = strstr(query_buffer, "SUBCHANNEL =");
229 console_irq = simple_strtoul(ptr + 13, NULL, 16);
6b979de3 230 __cpcmd("QUERY TERM", query_buffer, 1024, NULL);
1da177e4
LT		 231 ptr = strstr(query_buffer, "CONMODE");
232 /*
233 * Set the conmode to 3215 so that the device recognition
234 * will set the cu_type of the console to 3215. If the
235 * conmode is 3270 and we don't set it back then both
236 * 3215 and the 3270 driver will try to access the console
237 * device (3215 as console and 3270 as normal tty).
238 */
6b979de3 239 __cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
1da177e4
LT		 240 if (ptr == NULL) {
241#if defined(CONFIG_SCLP_CONSOLE)
242 SET_CONSOLE_SCLP;
243#endif
244 return;
245 }
246 if (strncmp(ptr + 8, "3270", 4) == 0) {
247#if defined(CONFIG_TN3270_CONSOLE)
248 SET_CONSOLE_3270;
249#elif defined(CONFIG_TN3215_CONSOLE)
250 SET_CONSOLE_3215;
251#elif defined(CONFIG_SCLP_CONSOLE)
252 SET_CONSOLE_SCLP;
253#endif
254 } else if (strncmp(ptr + 8, "3215", 4) == 0) {
255#if defined(CONFIG_TN3215_CONSOLE)
256 SET_CONSOLE_3215;
257#elif defined(CONFIG_TN3270_CONSOLE)
258 SET_CONSOLE_3270;
259#elif defined(CONFIG_SCLP_CONSOLE)
260 SET_CONSOLE_SCLP;
261#endif
262 }
263 } else if (MACHINE_IS_P390) {
264#if defined(CONFIG_TN3215_CONSOLE)
265 SET_CONSOLE_3215;
266#elif defined(CONFIG_TN3270_CONSOLE)
267 SET_CONSOLE_3270;
268#endif
269 } else {
270#if defined(CONFIG_SCLP_CONSOLE)
271 SET_CONSOLE_SCLP;
272#endif
273 }
274}
275
276#ifdef CONFIG_SMP
277extern void machine_restart_smp(char *);
278extern void machine_halt_smp(void);
279extern void machine_power_off_smp(void);
280
281void (*_machine_restart)(char *command) = machine_restart_smp;
282void (*_machine_halt)(void) = machine_halt_smp;
283void (*_machine_power_off)(void) = machine_power_off_smp;
284#else
285/*
286 * Reboot, halt and power_off routines for non SMP.
287 */
288extern void reipl(unsigned long devno);
c782268b 289extern void reipl_diag(void);
1da177e4
LT		 290static void do_machine_restart_nonsmp(char * __unused)
291{
c782268b
VS		 292 reipl_diag();
293
1da177e4 294 if (MACHINE_IS_VM)
68c11917 295 cpcmd ("IPL", NULL, 0, NULL);
1da177e4
LT		 296 else
297 reipl (0x10000 | S390_lowcore.ipl_device);
298}
299
300static void do_machine_halt_nonsmp(void)
301{
302 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
68c11917 303 cpcmd(vmhalt_cmd, NULL, 0, NULL);
1da177e4
LT		 304 signal_processor(smp_processor_id(), sigp_stop_and_store_status);
305}
306
307static void do_machine_power_off_nonsmp(void)
308{
309 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
68c11917 310 cpcmd(vmpoff_cmd, NULL, 0, NULL);
1da177e4
LT		 311 signal_processor(smp_processor_id(), sigp_stop_and_store_status);
312}
313
314void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;
315void (*_machine_halt)(void) = do_machine_halt_nonsmp;
316void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
317#endif
318
319 /*
320 * Reboot, halt and power_off stubs. They just call _machine_restart,
321 * _machine_halt or _machine_power_off.
322 */
323
324void machine_restart(char *command)
325{
06fa46a2
MS		 326 if (!in_interrupt() || oops_in_progress)
327 /*
328 * Only unblank the console if we are called in enabled
329 * context or a bust_spinlocks cleared the way for us.
330 */
331 console_unblank();
1da177e4
LT		 332 _machine_restart(command);
333}
334
1da177e4
LT		 335void machine_halt(void)
336{
06fa46a2
MS		 337 if (!in_interrupt() || oops_in_progress)
338 /*
339 * Only unblank the console if we are called in enabled
340 * context or a bust_spinlocks cleared the way for us.
341 */
342 console_unblank();
1da177e4
LT		 343 _machine_halt();
344}
345
1da177e4
LT		 346void machine_power_off(void)
347{
06fa46a2
MS		 348 if (!in_interrupt() || oops_in_progress)
349 /*
350 * Only unblank the console if we are called in enabled
351 * context or a bust_spinlocks cleared the way for us.
352 */
353 console_unblank();
1da177e4
LT		 354 _machine_power_off();
355}
356
53df751c
MS		 357/*
358 * Dummy power off function.
359 */
360void (*pm_power_off)(void) = machine_power_off;
361
c9e37353
HC		 362static void __init
363add_memory_hole(unsigned long start, unsigned long end)
1da177e4 364{
c9e37353
HC		 365 unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
366
367 if (end <= dma_pfn)
368 zholes_size[ZONE_DMA] += end - start + 1;
369 else if (start > dma_pfn)
370 zholes_size[ZONE_NORMAL] += end - start + 1;
371 else {
372 zholes_size[ZONE_DMA] += dma_pfn - start + 1;
373 zholes_size[ZONE_NORMAL] += end - dma_pfn;
374 }
375}
1da177e4 376
59685296
HC		 377static int __init early_parse_mem(char *p)
378{
379 memory_end = memparse(p, &p);
380 return 0;
381}
382early_param("mem", early_parse_mem);
383
384/*
385 * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
386 */
387static int __init early_parse_ipldelay(char *p)
c9e37353 388{
c9e37353 389 unsigned long delay = 0;
1da177e4 390
59685296 391 delay = simple_strtoul(p, &p, 0);
1da177e4 392
59685296
HC		 393 switch (*p) {
394 case 's':
395 case 'S':
396 delay *= 1000000;
397 break;
398 case 'm':
399 case 'M':
400 delay *= 60 * 1000000;
c9e37353 401 }
59685296
HC		 402
403 /* now wait for the requested amount of time */
404 udelay(delay);
405
406 return 0;
c9e37353 407}
59685296 408early_param("ipldelay", early_parse_ipldelay);
c9e37353
HC		 409
410static void __init
411setup_lowcore(void)
412{
413 struct _lowcore *lc;
414 int lc_pages;
415
416 /*
417 * Setup lowcore for boot cpu
418 */
419 lc_pages = sizeof(void *) == 8 ? 2 : 1;
420 lc = (struct _lowcore *)
421 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
422 memset(lc, 0, lc_pages * PAGE_SIZE);
0b642ede 423 lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
c9e37353
HC		 424 lc->restart_psw.addr =
425 PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
426 lc->external_new_psw.mask = PSW_KERNEL_BITS;
427 lc->external_new_psw.addr =
428 PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
429 lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT;
430 lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
431 lc->program_new_psw.mask = PSW_KERNEL_BITS;
432 lc->program_new_psw.addr =
433 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
77fa2245
HC		 434 lc->mcck_new_psw.mask =
435 PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
c9e37353
HC		 436 lc->mcck_new_psw.addr =
437 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
438 lc->io_new_psw.mask = PSW_KERNEL_BITS;
439 lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
440 lc->ipl_device = S390_lowcore.ipl_device;
441 lc->jiffy_timer = -1LL;
442 lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
443 lc->async_stack = (unsigned long)
444 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
c9e37353
HC		 445 lc->panic_stack = (unsigned long)
446 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
c9e37353
HC		 447 lc->current_task = (unsigned long) init_thread_union.thread_info.task;
448 lc->thread_info = (unsigned long) &init_thread_union;
347a8dc3 449#ifndef CONFIG_64BIT
77fa2245
HC		 450 if (MACHINE_HAS_IEEE) {
451 lc->extended_save_area_addr = (__u32)
452 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
453 /* enable extended save area */
454 ctl_set_bit(14, 29);
455 }
456#endif
c9e37353
HC		 457 set_prefix((u32)(unsigned long) lc);
458}
459
460static void __init
461setup_resources(void)
462{
463 struct resource *res;
464 int i;
465
cc13ad62
HC		 466 code_resource.start = (unsigned long) &_text;
467 code_resource.end = (unsigned long) &_etext - 1;
468 data_resource.start = (unsigned long) &_etext;
469 data_resource.end = (unsigned long) &_edata - 1;
470
c9e37353
HC		 471 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
472 res = alloc_bootmem_low(sizeof(struct resource));
473 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
474 switch (memory_chunk[i].type) {
475 case CHUNK_READ_WRITE:
476 res->name = "System RAM";
477 break;
478 case CHUNK_READ_ONLY:
479 res->name = "System ROM";
480 res->flags |= IORESOURCE_READONLY;
481 break;
482 default:
483 res->name = "reserved";
484 }
485 res->start = memory_chunk[i].addr;
486 res->end = memory_chunk[i].addr + memory_chunk[i].size - 1;
487 request_resource(&iomem_resource, res);
488 request_resource(res, &code_resource);
489 request_resource(res, &data_resource);
490 }
491}
492
493static void __init
494setup_memory(void)
495{
496 unsigned long bootmap_size;
0b642ede 497 unsigned long start_pfn, end_pfn, init_pfn;
c9e37353
HC		 498 unsigned long last_rw_end;
499 int i;
1da177e4
LT		 500
501 /*
502 * partially used pages are not usable - thus
503 * we are rounding upwards:
504 */
505 start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT;
506 end_pfn = max_pfn = memory_end >> PAGE_SHIFT;
507
0b642ede
PO		 508 /* Initialize storage key for kernel pages */
509 for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
510 page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
511
1da177e4
LT		 512 /*
513 * Initialize the boot-time allocator (with low memory only):
514 */
515 bootmap_size = init_bootmem(start_pfn, end_pfn);
516
517 /*
518 * Register RAM areas with the bootmem allocator.
519 */
c9e37353
HC		 520 last_rw_end = start_pfn;
521
0b642ede 522 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
1da177e4
LT		 523 unsigned long start_chunk, end_chunk;
524
525 if (memory_chunk[i].type != CHUNK_READ_WRITE)
526 continue;
527 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
528 start_chunk >>= PAGE_SHIFT;
529 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
530 end_chunk >>= PAGE_SHIFT;
531 if (start_chunk < start_pfn)
532 start_chunk = start_pfn;
533 if (end_chunk > end_pfn)
534 end_chunk = end_pfn;
c9e37353 535 if (start_chunk < end_chunk) {
0b642ede
PO		 536 /* Initialize storage key for RAM pages */
537 for (init_pfn = start_chunk ; init_pfn < end_chunk;
538 init_pfn++)
539 page_set_storage_key(init_pfn << PAGE_SHIFT,
540 PAGE_DEFAULT_KEY);
1da177e4
LT		 541 free_bootmem(start_chunk << PAGE_SHIFT,
542 (end_chunk - start_chunk) << PAGE_SHIFT);
c9e37353
HC		 543 if (last_rw_end < start_chunk)
544 add_memory_hole(last_rw_end, start_chunk - 1);
545 last_rw_end = end_chunk;
546 }
1da177e4
LT		 547 }
548
0b642ede
PO		 549 psw_set_key(PAGE_DEFAULT_KEY);
550
c9e37353
HC		 551 if (last_rw_end < end_pfn - 1)
552 add_memory_hole(last_rw_end, end_pfn - 1);
553
554 /*
555 * Reserve the bootmem bitmap itself as well. We do this in two
556 * steps (first step was init_bootmem()) because this catches
557 * the (very unlikely) case of us accidentally initializing the
558 * bootmem allocator with an invalid RAM area.
559 */
560 reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
1da177e4
LT		 561
562#ifdef CONFIG_BLK_DEV_INITRD
c9e37353 563 if (INITRD_START) {
1da177e4
LT		 564 if (INITRD_START + INITRD_SIZE <= memory_end) {
565 reserve_bootmem(INITRD_START, INITRD_SIZE);
566 initrd_start = INITRD_START;
567 initrd_end = initrd_start + INITRD_SIZE;
568 } else {
c9e37353
HC		 569 printk("initrd extends beyond end of memory "
570 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
571 initrd_start + INITRD_SIZE, memory_end);
572 initrd_start = initrd_end = 0;
1da177e4 573 }
c9e37353 574 }
1da177e4 575#endif
c9e37353 576}
1da177e4 577
c9e37353
HC		 578/*
579 * Setup function called from init/main.c just after the banner
580 * was printed.
581 */
1da177e4 582
c9e37353
HC		 583void __init
584setup_arch(char **cmdline_p)
585{
1da177e4 586 /*
c9e37353 587 * print what head.S has found out about the machine
1da177e4 588 */
347a8dc3 589#ifndef CONFIG_64BIT
c9e37353
HC		 590 printk((MACHINE_IS_VM) ?
591 "We are running under VM (31 bit mode)\n" :
592 "We are running native (31 bit mode)\n");
593 printk((MACHINE_HAS_IEEE) ?
594 "This machine has an IEEE fpu\n" :
595 "This machine has no IEEE fpu\n");
347a8dc3 596#else /* CONFIG_64BIT */
c9e37353
HC		 597 printk((MACHINE_IS_VM) ?
598 "We are running under VM (64 bit mode)\n" :
599 "We are running native (64 bit mode)\n");
347a8dc3 600#endif /* CONFIG_64BIT */
c9e37353 601
59685296
HC		 602 /* Save unparsed command line copy for /proc/cmdline */
603 strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
604
605 *cmdline_p = COMMAND_LINE;
606 *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0';
607
c9e37353 608 ROOT_DEV = Root_RAM0;
59685296
HC		 609
610 init_mm.start_code = PAGE_OFFSET;
611 init_mm.end_code = (unsigned long) &_etext;
612 init_mm.end_data = (unsigned long) &_edata;
613 init_mm.brk = (unsigned long) &_end;
614
615 memory_end = memory_size;
616
617 parse_early_param();
618
347a8dc3 619#ifndef CONFIG_64BIT
59685296
HC		 620 memory_end &= ~0x400000UL;
621
c9e37353
HC		 622 /*
623 * We need some free virtual space to be able to do vmalloc.
624 * On a machine with 2GB memory we make sure that we have at
625 * least 128 MB free space for vmalloc.
626 */
627 if (memory_end > 1920*1024*1024)
628 memory_end = 1920*1024*1024;
347a8dc3 629#else /* CONFIG_64BIT */
59685296 630 memory_end &= ~0x200000UL;
347a8dc3 631#endif /* CONFIG_64BIT */
c9e37353 632
c9e37353
HC		 633 setup_memory();
634 setup_resources();
635 setup_lowcore();
636
1da177e4
LT		 637 cpu_init();
638 __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
255acee7 639 smp_setup_cpu_possible_map();
1da177e4
LT		 640
641 /*
642 * Create kernel page tables and switch to virtual addressing.
643 */
644 paging_init();
645
646 /* Setup default console */
647 conmode_default();
648}
649
650void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
651{
652 printk("cpu %d "
653#ifdef CONFIG_SMP
654 "phys_idx=%d "
655#endif
656 "vers=%02X ident=%06X machine=%04X unused=%04X\n",
657 cpuinfo->cpu_nr,
658#ifdef CONFIG_SMP
659 cpuinfo->cpu_addr,
660#endif
661 cpuinfo->cpu_id.version,
662 cpuinfo->cpu_id.ident,
663 cpuinfo->cpu_id.machine,
664 cpuinfo->cpu_id.unused);
665}
666
667/*
668 * show_cpuinfo - Get information on one CPU for use by procfs.
669 */
670
671static int show_cpuinfo(struct seq_file *m, void *v)
672{
673 struct cpuinfo_S390 *cpuinfo;
674 unsigned long n = (unsigned long) v - 1;
675
b7ae9dd8 676 preempt_disable();
1da177e4
LT		 677 if (!n) {
678 seq_printf(m, "vendor_id : IBM/S390\n"
679 "# processors : %i\n"
680 "bogomips per cpu: %lu.%02lu\n",
681 num_online_cpus(), loops_per_jiffy/(500000/HZ),
682 (loops_per_jiffy/(5000/HZ))%100);
683 }
684 if (cpu_online(n)) {
685#ifdef CONFIG_SMP
686 if (smp_processor_id() == n)
687 cpuinfo = &S390_lowcore.cpu_data;
688 else
689 cpuinfo = &lowcore_ptr[n]->cpu_data;
690#else
691 cpuinfo = &S390_lowcore.cpu_data;
692#endif
693 seq_printf(m, "processor %li: "
694 "version = %02X, "
695 "identification = %06X, "
696 "machine = %04X\n",
697 n, cpuinfo->cpu_id.version,
698 cpuinfo->cpu_id.ident,
699 cpuinfo->cpu_id.machine);
700 }
b7ae9dd8 701 preempt_enable();
1da177e4
LT		 702 return 0;
703}
704
705static void *c_start(struct seq_file *m, loff_t *pos)
706{
707 return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
708}
709static void *c_next(struct seq_file *m, void *v, loff_t *pos)
710{
711 ++*pos;
712 return c_start(m, pos);
713}
714static void c_stop(struct seq_file *m, void *v)
715{
716}
717struct seq_operations cpuinfo_op = {
718 .start = c_start,
719 .next = c_next,
720 .stop = c_stop,
721 .show = show_cpuinfo,
722};
723
1e8e3383
HC		 724#define DEFINE_IPL_ATTR(_name, _format, _value) \
725static ssize_t ipl_##_name##_show(struct subsystem *subsys, \
726 char *page) \
727{ \
728 return sprintf(page, _format, _value); \
729} \
730static struct subsys_attribute ipl_##_name##_attr = \
731 __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL);
732
733DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long)
734 IPL_PARMBLOCK_START->fcp.wwpn);
735DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long)
736 IPL_PARMBLOCK_START->fcp.lun);
737DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long)
738 IPL_PARMBLOCK_START->fcp.bootprog);
739DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long)
740 IPL_PARMBLOCK_START->fcp.br_lba);
741
742enum ipl_type_type {
743 ipl_type_unknown,
744 ipl_type_ccw,
745 ipl_type_fcp,
746};
747
748static enum ipl_type_type
749get_ipl_type(void)
750{
751 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
752
753 if (!IPL_DEVNO_VALID)
754 return ipl_type_unknown;
755 if (!IPL_PARMBLOCK_VALID)
756 return ipl_type_ccw;
757 if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION)
758 return ipl_type_unknown;
759 if (ipl->fcp.pbt != IPL_TYPE_FCP)
760 return ipl_type_unknown;
761 return ipl_type_fcp;
762}
763
764static ssize_t
765ipl_type_show(struct subsystem *subsys, char *page)
766{
767 switch (get_ipl_type()) {
768 case ipl_type_ccw:
769 return sprintf(page, "ccw\n");
770 case ipl_type_fcp:
771 return sprintf(page, "fcp\n");
772 default:
773 return sprintf(page, "unknown\n");
774 }
775}
776
777static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type);
778
779static ssize_t
780ipl_device_show(struct subsystem *subsys, char *page)
781{
782 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
783
784 switch (get_ipl_type()) {
785 case ipl_type_ccw:
786 return sprintf(page, "0.0.%04x\n", ipl_devno);
787 case ipl_type_fcp:
788 return sprintf(page, "0.0.%04x\n", ipl->fcp.devno);
789 default:
790 return 0;
791 }
792}
793
794static struct subsys_attribute ipl_device_attr =
795 __ATTR(device, S_IRUGO, ipl_device_show, NULL);
796
797static struct attribute *ipl_fcp_attrs[] = {
798 &ipl_type_attr.attr,
799 &ipl_device_attr.attr,
800 &ipl_wwpn_attr.attr,
801 &ipl_lun_attr.attr,
802 &ipl_bootprog_attr.attr,
803 &ipl_br_lba_attr.attr,
804 NULL,
805};
806
807static struct attribute_group ipl_fcp_attr_group = {
808 .attrs = ipl_fcp_attrs,
809};
810
811static struct attribute *ipl_ccw_attrs[] = {
812 &ipl_type_attr.attr,
813 &ipl_device_attr.attr,
814 NULL,
815};
816
817static struct attribute_group ipl_ccw_attr_group = {
818 .attrs = ipl_ccw_attrs,
819};
820
821static struct attribute *ipl_unknown_attrs[] = {
822 &ipl_type_attr.attr,
823 NULL,
824};
825
826static struct attribute_group ipl_unknown_attr_group = {
827 .attrs = ipl_unknown_attrs,
828};
829
830static ssize_t
831ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
832{
833 unsigned int size = IPL_PARMBLOCK_SIZE;
834
835 if (off > size)
836 return 0;
837 if (off + count > size)
838 count = size - off;
839
840 memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count);
841 return count;
842}
843
844static struct bin_attribute ipl_parameter_attr = {
845 .attr = {
846 .name = "binary_parameter",
847 .mode = S_IRUGO,
848 .owner = THIS_MODULE,
849 },
850 .size = PAGE_SIZE,
851 .read = &ipl_parameter_read,
852};
853
854static ssize_t
855ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
856{
857 unsigned int size = IPL_PARMBLOCK_START->fcp.scp_data_len;
858 void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data;
859
860 if (off > size)
861 return 0;
862 if (off + count > size)
863 count = size - off;
864
865 memcpy(buf, scp_data + off, count);
866 return count;
867}
868
869static struct bin_attribute ipl_scp_data_attr = {
870 .attr = {
871 .name = "scp_data",
872 .mode = S_IRUGO,
873 .owner = THIS_MODULE,
874 },
875 .size = PAGE_SIZE,
876 .read = &ipl_scp_data_read,
877};
878
879static decl_subsys(ipl, NULL, NULL);
880
881static int __init
882ipl_device_sysfs_register(void) {
883 int rc;
884
885 rc = firmware_register(&ipl_subsys);
886 if (rc)
887 return rc;
888
889 switch (get_ipl_type()) {
890 case ipl_type_ccw:
891 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_ccw_attr_group);
892 break;
893 case ipl_type_fcp:
894 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
895 sysfs_create_bin_file(&ipl_subsys.kset.kobj,
896 &ipl_parameter_attr);
897 sysfs_create_bin_file(&ipl_subsys.kset.kobj,
898 &ipl_scp_data_attr);
899 break;
900 default:
901 sysfs_create_group(&ipl_subsys.kset.kobj,
902 &ipl_unknown_attr_group);
903 break;
904 }
905 return 0;
906}
907
908__initcall(ipl_device_sysfs_register);
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