projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[S390] Cleanup memory_chunk array usage.
[deliverable/linux.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>
1da177e4
LT		 31#include <linux/init.h>
32#include <linux/initrd.h>
33#include <linux/bootmem.h>
34#include <linux/root_dev.h>
35#include <linux/console.h>
36#include <linux/seq_file.h>
37#include <linux/kernel_stat.h>
1e8e3383 38#include <linux/device.h>
585c3047 39#include <linux/notifier.h>
65912a84 40#include <linux/pfn.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 52
d02765d1
GS		 53/*
54 * User copy operations.
55 */
56struct uaccess_ops uaccess;
57EXPORT_SYMBOL_GPL(uaccess);
58
1da177e4
LT		 59/*
60 * Machine setup..
61 */
62unsigned int console_mode = 0;
63unsigned int console_devno = -1;
64unsigned int console_irq = -1;
65unsigned long memory_size = 0;
66unsigned long machine_flags = 0;
36a2bd42
HC		 67
68struct mem_chunk memory_chunk[MEMORY_CHUNKS];
1da177e4 69volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
bcc8bcb1 70unsigned long __initdata zholes_size[MAX_NR_ZONES];
c9e37353 71static unsigned long __initdata memory_end;
1da177e4 72
1da177e4
LT		 73/*
74 * This is set up by the setup-routine at boot-time
75 * for S390 need to find out, what we have to setup
76 * using address 0x10400 ...
77 */
78
79#include <asm/setup.h>
80
1da177e4
LT		 81static struct resource code_resource = {
82 .name = "Kernel code",
83 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
84};
85
86static struct resource data_resource = {
87 .name = "Kernel data",
88 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
89};
90
91/*
92 * cpu_init() initializes state that is per-CPU.
93 */
94void __devinit cpu_init (void)
95{
96 int addr = hard_smp_processor_id();
97
98 /*
99 * Store processor id in lowcore (used e.g. in timer_interrupt)
100 */
94c12cc7 101 asm volatile("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));
1da177e4
LT		 102 S390_lowcore.cpu_data.cpu_addr = addr;
103
104 /*
105 * Force FPU initialization:
106 */
107 clear_thread_flag(TIF_USEDFPU);
108 clear_used_math();
109
110 atomic_inc(&init_mm.mm_count);
111 current->active_mm = &init_mm;
112 if (current->mm)
113 BUG();
114 enter_lazy_tlb(&init_mm, current);
115}
116
117/*
118 * VM halt and poweroff setup routines
119 */
120char vmhalt_cmd[128] = "";
121char vmpoff_cmd[128] = "";
585c3047 122char vmpanic_cmd[128] = "";
1da177e4
LT		 123
124static inline void strncpy_skip_quote(char *dst, char *src, int n)
125{
126 int sx, dx;
127
128 dx = 0;
129 for (sx = 0; src[sx] != 0; sx++) {
130 if (src[sx] == '"') continue;
131 dst[dx++] = src[sx];
132 if (dx >= n) break;
133 }
134}
135
136static int __init vmhalt_setup(char *str)
137{
138 strncpy_skip_quote(vmhalt_cmd, str, 127);
139 vmhalt_cmd[127] = 0;
140 return 1;
141}
142
143__setup("vmhalt=", vmhalt_setup);
144
145static int __init vmpoff_setup(char *str)
146{
147 strncpy_skip_quote(vmpoff_cmd, str, 127);
148 vmpoff_cmd[127] = 0;
149 return 1;
150}
151
152__setup("vmpoff=", vmpoff_setup);
153
585c3047
PO		 154static int vmpanic_notify(struct notifier_block *self, unsigned long event,
155 void *data)
156{
157 if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0)
158 cpcmd(vmpanic_cmd, NULL, 0, NULL);
159
160 return NOTIFY_OK;
161}
162
163#define PANIC_PRI_VMPANIC 0
164
165static struct notifier_block vmpanic_nb = {
166 .notifier_call = vmpanic_notify,
167 .priority = PANIC_PRI_VMPANIC
168};
169
170static int __init vmpanic_setup(char *str)
171{
172 static int register_done __initdata = 0;
173
174 strncpy_skip_quote(vmpanic_cmd, str, 127);
175 vmpanic_cmd[127] = 0;
176 if (!register_done) {
177 register_done = 1;
178 atomic_notifier_chain_register(&panic_notifier_list,
179 &vmpanic_nb);
180 }
181 return 1;
182}
183
184__setup("vmpanic=", vmpanic_setup);
185
1da177e4
LT		 186/*
187 * condev= and conmode= setup parameter.
188 */
189
190static int __init condev_setup(char *str)
191{
192 int vdev;
193
194 vdev = simple_strtoul(str, &str, 0);
195 if (vdev >= 0 && vdev < 65536) {
196 console_devno = vdev;
197 console_irq = -1;
198 }
199 return 1;
200}
201
202__setup("condev=", condev_setup);
203
204static int __init conmode_setup(char *str)
205{
206#if defined(CONFIG_SCLP_CONSOLE)
207 if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0)
208 SET_CONSOLE_SCLP;
209#endif
210#if defined(CONFIG_TN3215_CONSOLE)
211 if (strncmp(str, "3215", 5) == 0)
212 SET_CONSOLE_3215;
213#endif
214#if defined(CONFIG_TN3270_CONSOLE)
215 if (strncmp(str, "3270", 5) == 0)
216 SET_CONSOLE_3270;
217#endif
218 return 1;
219}
220
221__setup("conmode=", conmode_setup);
222
223static void __init conmode_default(void)
224{
225 char query_buffer[1024];
226 char *ptr;
227
228 if (MACHINE_IS_VM) {
740b5706 229 cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
1da177e4
LT		 230 console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
231 ptr = strstr(query_buffer, "SUBCHANNEL =");
232 console_irq = simple_strtoul(ptr + 13, NULL, 16);
740b5706 233 cpcmd("QUERY TERM", query_buffer, 1024, NULL);
1da177e4
LT		 234 ptr = strstr(query_buffer, "CONMODE");
235 /*
236 * Set the conmode to 3215 so that the device recognition
237 * will set the cu_type of the console to 3215. If the
238 * conmode is 3270 and we don't set it back then both
239 * 3215 and the 3270 driver will try to access the console
240 * device (3215 as console and 3270 as normal tty).
241 */
740b5706 242 cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
1da177e4
LT		 243 if (ptr == NULL) {
244#if defined(CONFIG_SCLP_CONSOLE)
245 SET_CONSOLE_SCLP;
246#endif
247 return;
248 }
249 if (strncmp(ptr + 8, "3270", 4) == 0) {
250#if defined(CONFIG_TN3270_CONSOLE)
251 SET_CONSOLE_3270;
252#elif defined(CONFIG_TN3215_CONSOLE)
253 SET_CONSOLE_3215;
254#elif defined(CONFIG_SCLP_CONSOLE)
255 SET_CONSOLE_SCLP;
256#endif
257 } else if (strncmp(ptr + 8, "3215", 4) == 0) {
258#if defined(CONFIG_TN3215_CONSOLE)
259 SET_CONSOLE_3215;
260#elif defined(CONFIG_TN3270_CONSOLE)
261 SET_CONSOLE_3270;
262#elif defined(CONFIG_SCLP_CONSOLE)
263 SET_CONSOLE_SCLP;
264#endif
265 }
266 } else if (MACHINE_IS_P390) {
267#if defined(CONFIG_TN3215_CONSOLE)
268 SET_CONSOLE_3215;
269#elif defined(CONFIG_TN3270_CONSOLE)
270 SET_CONSOLE_3270;
271#endif
272 } else {
273#if defined(CONFIG_SCLP_CONSOLE)
274 SET_CONSOLE_SCLP;
275#endif
276 }
277}
278
279#ifdef CONFIG_SMP
280extern void machine_restart_smp(char *);
281extern void machine_halt_smp(void);
282extern void machine_power_off_smp(void);
283
284void (*_machine_restart)(char *command) = machine_restart_smp;
285void (*_machine_halt)(void) = machine_halt_smp;
286void (*_machine_power_off)(void) = machine_power_off_smp;
287#else
288/*
289 * Reboot, halt and power_off routines for non SMP.
290 */
1da177e4
LT		 291static void do_machine_restart_nonsmp(char * __unused)
292{
ff6b8ea6 293 do_reipl();
1da177e4
LT		 294}
295
296static void do_machine_halt_nonsmp(void)
297{
298 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
740b5706 299 __cpcmd(vmhalt_cmd, NULL, 0, NULL);
1da177e4
LT		 300 signal_processor(smp_processor_id(), sigp_stop_and_store_status);
301}
302
303static void do_machine_power_off_nonsmp(void)
304{
305 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
740b5706 306 __cpcmd(vmpoff_cmd, NULL, 0, NULL);
1da177e4
LT		 307 signal_processor(smp_processor_id(), sigp_stop_and_store_status);
308}
309
310void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;
311void (*_machine_halt)(void) = do_machine_halt_nonsmp;
312void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
313#endif
314
315 /*
316 * Reboot, halt and power_off stubs. They just call _machine_restart,
317 * _machine_halt or _machine_power_off.
318 */
319
320void machine_restart(char *command)
321{
06fa46a2
MS		 322 if (!in_interrupt() || oops_in_progress)
323 /*
324 * Only unblank the console if we are called in enabled
325 * context or a bust_spinlocks cleared the way for us.
326 */
327 console_unblank();
1da177e4
LT		 328 _machine_restart(command);
329}
330
1da177e4
LT		 331void machine_halt(void)
332{
06fa46a2
MS		 333 if (!in_interrupt() || oops_in_progress)
334 /*
335 * Only unblank the console if we are called in enabled
336 * context or a bust_spinlocks cleared the way for us.
337 */
338 console_unblank();
1da177e4
LT		 339 _machine_halt();
340}
341
1da177e4
LT		 342void machine_power_off(void)
343{
06fa46a2
MS		 344 if (!in_interrupt() || oops_in_progress)
345 /*
346 * Only unblank the console if we are called in enabled
347 * context or a bust_spinlocks cleared the way for us.
348 */
349 console_unblank();
1da177e4
LT		 350 _machine_power_off();
351}
352
53df751c
MS		 353/*
354 * Dummy power off function.
355 */
356void (*pm_power_off)(void) = machine_power_off;
357
bcc8bcb1
HC		 358static void __init
359add_memory_hole(unsigned long start, unsigned long end)
360{
361 unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
362
363 if (end <= dma_pfn)
364 zholes_size[ZONE_DMA] += end - start + 1;
365 else if (start > dma_pfn)
366 zholes_size[ZONE_NORMAL] += end - start + 1;
367 else {
368 zholes_size[ZONE_DMA] += dma_pfn - start + 1;
369 zholes_size[ZONE_NORMAL] += end - dma_pfn;
370 }
371}
372
59685296
HC		 373static int __init early_parse_mem(char *p)
374{
375 memory_end = memparse(p, &p);
376 return 0;
377}
378early_param("mem", early_parse_mem);
379
380/*
381 * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
382 */
383static int __init early_parse_ipldelay(char *p)
c9e37353 384{
c9e37353 385 unsigned long delay = 0;
1da177e4 386
59685296 387 delay = simple_strtoul(p, &p, 0);
1da177e4 388
59685296
HC		 389 switch (*p) {
390 case 's':
391 case 'S':
392 delay *= 1000000;
393 break;
394 case 'm':
395 case 'M':
396 delay *= 60 * 1000000;
c9e37353 397 }
59685296
HC		 398
399 /* now wait for the requested amount of time */
400 udelay(delay);
401
402 return 0;
c9e37353 403}
59685296 404early_param("ipldelay", early_parse_ipldelay);
c9e37353
HC		 405
406static void __init
407setup_lowcore(void)
408{
409 struct _lowcore *lc;
410 int lc_pages;
411
412 /*
413 * Setup lowcore for boot cpu
414 */
415 lc_pages = sizeof(void *) == 8 ? 2 : 1;
416 lc = (struct _lowcore *)
417 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
418 memset(lc, 0, lc_pages * PAGE_SIZE);
0b642ede 419 lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
c9e37353
HC		 420 lc->restart_psw.addr =
421 PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
422 lc->external_new_psw.mask = PSW_KERNEL_BITS;
423 lc->external_new_psw.addr =
424 PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
425 lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT;
426 lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
427 lc->program_new_psw.mask = PSW_KERNEL_BITS;
428 lc->program_new_psw.addr =
429 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
77fa2245
HC		 430 lc->mcck_new_psw.mask =
431 PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
c9e37353
HC		 432 lc->mcck_new_psw.addr =
433 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
434 lc->io_new_psw.mask = PSW_KERNEL_BITS;
435 lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
436 lc->ipl_device = S390_lowcore.ipl_device;
437 lc->jiffy_timer = -1LL;
438 lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
439 lc->async_stack = (unsigned long)
440 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
c9e37353
HC		 441 lc->panic_stack = (unsigned long)
442 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
c9e37353
HC		 443 lc->current_task = (unsigned long) init_thread_union.thread_info.task;
444 lc->thread_info = (unsigned long) &init_thread_union;
347a8dc3 445#ifndef CONFIG_64BIT
77fa2245
HC		 446 if (MACHINE_HAS_IEEE) {
447 lc->extended_save_area_addr = (__u32)
448 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
449 /* enable extended save area */
c4972f33 450 __ctl_set_bit(14, 29);
77fa2245
HC		 451 }
452#endif
c9e37353
HC		 453 set_prefix((u32)(unsigned long) lc);
454}
455
456static void __init
457setup_resources(void)
458{
459 struct resource *res;
460 int i;
461
cc13ad62
HC		 462 code_resource.start = (unsigned long) &_text;
463 code_resource.end = (unsigned long) &_etext - 1;
464 data_resource.start = (unsigned long) &_etext;
465 data_resource.end = (unsigned long) &_edata - 1;
466
c9e37353
HC		 467 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
468 res = alloc_bootmem_low(sizeof(struct resource));
469 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
470 switch (memory_chunk[i].type) {
471 case CHUNK_READ_WRITE:
472 res->name = "System RAM";
473 break;
474 case CHUNK_READ_ONLY:
475 res->name = "System ROM";
476 res->flags |= IORESOURCE_READONLY;
477 break;
478 default:
479 res->name = "reserved";
480 }
481 res->start = memory_chunk[i].addr;
482 res->end = memory_chunk[i].addr + memory_chunk[i].size - 1;
483 request_resource(&iomem_resource, res);
484 request_resource(res, &code_resource);
485 request_resource(res, &data_resource);
486 }
487}
488
489static void __init
490setup_memory(void)
491{
492 unsigned long bootmap_size;
0b642ede 493 unsigned long start_pfn, end_pfn, init_pfn;
bcc8bcb1 494 unsigned long last_rw_end;
c9e37353 495 int i;
1da177e4
LT		 496
497 /*
498 * partially used pages are not usable - thus
499 * we are rounding upwards:
500 */
65912a84
HC		 501 start_pfn = PFN_UP(__pa(&_end));
502 end_pfn = max_pfn = PFN_DOWN(memory_end);
1da177e4 503
0b642ede
PO		 504 /* Initialize storage key for kernel pages */
505 for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
506 page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
507
65912a84
HC		 508#ifdef CONFIG_BLK_DEV_INITRD
509 /*
510 * Move the initrd in case the bitmap of the bootmem allocater
511 * would overwrite it.
512 */
513
514 if (INITRD_START && INITRD_SIZE) {
515 unsigned long bmap_size;
516 unsigned long start;
517
518 bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1);
519 bmap_size = PFN_PHYS(bmap_size);
520
521 if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) {
522 start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE;
523
524 if (start + INITRD_SIZE > memory_end) {
525 printk("initrd extends beyond end of memory "
526 "(0x%08lx > 0x%08lx)\n"
527 "disabling initrd\n",
528 start + INITRD_SIZE, memory_end);
529 INITRD_START = INITRD_SIZE = 0;
530 } else {
531 printk("Moving initrd (0x%08lx -> 0x%08lx, "
532 "size: %ld)\n",
533 INITRD_START, start, INITRD_SIZE);
534 memmove((void *) start, (void *) INITRD_START,
535 INITRD_SIZE);
536 INITRD_START = start;
537 }
538 }
539 }
540#endif
541
1da177e4 542 /*
7676bef9 543 * Initialize the boot-time allocator
1da177e4
LT		 544 */
545 bootmap_size = init_bootmem(start_pfn, end_pfn);
546
547 /*
548 * Register RAM areas with the bootmem allocator.
549 */
bcc8bcb1 550 last_rw_end = start_pfn;
c9e37353 551
0b642ede 552 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
bcc8bcb1 553 unsigned long start_chunk, end_chunk;
1da177e4
LT		 554
555 if (memory_chunk[i].type != CHUNK_READ_WRITE)
556 continue;
bcc8bcb1
HC		 557 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
558 start_chunk >>= PAGE_SHIFT;
559 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
560 end_chunk >>= PAGE_SHIFT;
561 if (start_chunk < start_pfn)
562 start_chunk = start_pfn;
563 if (end_chunk > end_pfn)
564 end_chunk = end_pfn;
565 if (start_chunk < end_chunk) {
566 /* Initialize storage key for RAM pages */
567 for (init_pfn = start_chunk ; init_pfn < end_chunk;
568 init_pfn++)
569 page_set_storage_key(init_pfn << PAGE_SHIFT,
570 PAGE_DEFAULT_KEY);
571 free_bootmem(start_chunk << PAGE_SHIFT,
572 (end_chunk - start_chunk) << PAGE_SHIFT);
573 if (last_rw_end < start_chunk)
574 add_memory_hole(last_rw_end, start_chunk - 1);
575 last_rw_end = end_chunk;
576 }
1da177e4
LT		 577 }
578
0b642ede
PO		 579 psw_set_key(PAGE_DEFAULT_KEY);
580
bcc8bcb1
HC		 581 if (last_rw_end < end_pfn - 1)
582 add_memory_hole(last_rw_end, end_pfn - 1);
c9e37353
HC		 583
584 /*
585 * Reserve the bootmem bitmap itself as well. We do this in two
586 * steps (first step was init_bootmem()) because this catches
587 * the (very unlikely) case of us accidentally initializing the
588 * bootmem allocator with an invalid RAM area.
589 */
590 reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
1da177e4
LT		 591
592#ifdef CONFIG_BLK_DEV_INITRD
65912a84 593 if (INITRD_START && INITRD_SIZE) {
1da177e4
LT		 594 if (INITRD_START + INITRD_SIZE <= memory_end) {
595 reserve_bootmem(INITRD_START, INITRD_SIZE);
596 initrd_start = INITRD_START;
597 initrd_end = initrd_start + INITRD_SIZE;
598 } else {
c9e37353
HC		 599 printk("initrd extends beyond end of memory "
600 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
601 initrd_start + INITRD_SIZE, memory_end);
602 initrd_start = initrd_end = 0;
1da177e4 603 }
c9e37353 604 }
1da177e4 605#endif
c9e37353 606}
1da177e4 607
c9e37353
HC		 608/*
609 * Setup function called from init/main.c just after the banner
610 * was printed.
611 */
1da177e4 612
c9e37353
HC		 613void __init
614setup_arch(char **cmdline_p)
615{
1da177e4 616 /*
c9e37353 617 * print what head.S has found out about the machine
1da177e4 618 */
347a8dc3 619#ifndef CONFIG_64BIT
c9e37353
HC		 620 printk((MACHINE_IS_VM) ?
621 "We are running under VM (31 bit mode)\n" :
622 "We are running native (31 bit mode)\n");
623 printk((MACHINE_HAS_IEEE) ?
624 "This machine has an IEEE fpu\n" :
625 "This machine has no IEEE fpu\n");
347a8dc3 626#else /* CONFIG_64BIT */
c9e37353
HC		 627 printk((MACHINE_IS_VM) ?
628 "We are running under VM (64 bit mode)\n" :
629 "We are running native (64 bit mode)\n");
347a8dc3 630#endif /* CONFIG_64BIT */
c9e37353 631
59685296
HC		 632 /* Save unparsed command line copy for /proc/cmdline */
633 strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
634
635 *cmdline_p = COMMAND_LINE;
636 *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0';
637
c9e37353 638 ROOT_DEV = Root_RAM0;
59685296
HC		 639
640 init_mm.start_code = PAGE_OFFSET;
641 init_mm.end_code = (unsigned long) &_etext;
642 init_mm.end_data = (unsigned long) &_edata;
643 init_mm.brk = (unsigned long) &_end;
644
645 memory_end = memory_size;
646
6c2a9e6d
GS		 647 if (MACHINE_HAS_MVCOS)
648 memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess));
649 else
650 memcpy(&uaccess, &uaccess_std, sizeof(uaccess));
651
59685296
HC		 652 parse_early_param();
653
347a8dc3 654#ifndef CONFIG_64BIT
59685296
HC		 655 memory_end &= ~0x400000UL;
656
c9e37353
HC		 657 /*
658 * We need some free virtual space to be able to do vmalloc.
659 * On a machine with 2GB memory we make sure that we have at
660 * least 128 MB free space for vmalloc.
661 */
662 if (memory_end > 1920*1024*1024)
663 memory_end = 1920*1024*1024;
347a8dc3 664#else /* CONFIG_64BIT */
59685296 665 memory_end &= ~0x200000UL;
347a8dc3 666#endif /* CONFIG_64BIT */
c9e37353 667
c9e37353
HC		 668 setup_memory();
669 setup_resources();
670 setup_lowcore();
671
1da177e4
LT		 672 cpu_init();
673 __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
255acee7 674 smp_setup_cpu_possible_map();
1da177e4
LT		 675
676 /*
677 * Create kernel page tables and switch to virtual addressing.
678 */
679 paging_init();
680
681 /* Setup default console */
682 conmode_default();
683}
684
685void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
686{
687 printk("cpu %d "
688#ifdef CONFIG_SMP
689 "phys_idx=%d "
690#endif
691 "vers=%02X ident=%06X machine=%04X unused=%04X\n",
692 cpuinfo->cpu_nr,
693#ifdef CONFIG_SMP
694 cpuinfo->cpu_addr,
695#endif
696 cpuinfo->cpu_id.version,
697 cpuinfo->cpu_id.ident,
698 cpuinfo->cpu_id.machine,
699 cpuinfo->cpu_id.unused);
700}
701
702/*
703 * show_cpuinfo - Get information on one CPU for use by procfs.
704 */
705
706static int show_cpuinfo(struct seq_file *m, void *v)
707{
708 struct cpuinfo_S390 *cpuinfo;
709 unsigned long n = (unsigned long) v - 1;
710
b7ae9dd8 711 preempt_disable();
1da177e4
LT		 712 if (!n) {
713 seq_printf(m, "vendor_id : IBM/S390\n"
714 "# processors : %i\n"
715 "bogomips per cpu: %lu.%02lu\n",
716 num_online_cpus(), loops_per_jiffy/(500000/HZ),
717 (loops_per_jiffy/(5000/HZ))%100);
718 }
719 if (cpu_online(n)) {
720#ifdef CONFIG_SMP
721 if (smp_processor_id() == n)
722 cpuinfo = &S390_lowcore.cpu_data;
723 else
724 cpuinfo = &lowcore_ptr[n]->cpu_data;
725#else
726 cpuinfo = &S390_lowcore.cpu_data;
727#endif
728 seq_printf(m, "processor %li: "
729 "version = %02X, "
730 "identification = %06X, "
731 "machine = %04X\n",
732 n, cpuinfo->cpu_id.version,
733 cpuinfo->cpu_id.ident,
734 cpuinfo->cpu_id.machine);
735 }
b7ae9dd8 736 preempt_enable();
1da177e4
LT		 737 return 0;
738}
739
740static void *c_start(struct seq_file *m, loff_t *pos)
741{
742 return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
743}
744static void *c_next(struct seq_file *m, void *v, loff_t *pos)
745{
746 ++*pos;
747 return c_start(m, pos);
748}
749static void c_stop(struct seq_file *m, void *v)
750{
751}
752struct seq_operations cpuinfo_op = {
753 .start = c_start,
754 .next = c_next,
755 .stop = c_stop,
756 .show = show_cpuinfo,
757};
758
Linux kernel - Deliverables
This page took 0.39888 seconds and 5 git commands to generate.