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[linux-2.6.git] / arch / s390 / kernel / setup.c
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>
39
40 #include <asm/uaccess.h>
41 #include <asm/system.h>
42 #include <asm/smp.h>
43 #include <asm/mmu_context.h>
44 #include <asm/cpcmd.h>
45 #include <asm/lowcore.h>
46 #include <asm/irq.h>
47
48 /*
49  * Machine setup..
50  */
51 unsigned int console_mode = 0;
52 unsigned int console_devno = -1;
53 unsigned int console_irq = -1;
54 unsigned long memory_size = 0;
55 unsigned long machine_flags = 0;
56 unsigned int default_storage_key = 0;
57 struct {
58         unsigned long addr, size, type;
59 } memory_chunk[MEMORY_CHUNKS] = { { 0 } };
60 #define CHUNK_READ_WRITE 0
61 #define CHUNK_READ_ONLY 1
62 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
63 unsigned long __initdata zholes_size[MAX_NR_ZONES];
64 static unsigned long __initdata memory_end;
65
66 /*
67  * Setup options
68  */
69 extern int _text,_etext, _edata, _end;
70
71 /*
72  * This is set up by the setup-routine at boot-time
73  * for S390 need to find out, what we have to setup
74  * using address 0x10400 ...
75  */
76
77 #include <asm/setup.h>
78
79 static char command_line[COMMAND_LINE_SIZE] = { 0, };
80
81 static struct resource code_resource = {
82         .name  = "Kernel code",
83         .start = (unsigned long) &_text,
84         .end = (unsigned long) &_etext - 1,
85         .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
86 };
87
88 static struct resource data_resource = {
89         .name = "Kernel data",
90         .start = (unsigned long) &_etext,
91         .end = (unsigned long) &_edata - 1,
92         .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
93 };
94
95 /*
96  * cpu_init() initializes state that is per-CPU.
97  */
98 void __devinit cpu_init (void)
99 {
100         int addr = hard_smp_processor_id();
101
102         /*
103          * Store processor id in lowcore (used e.g. in timer_interrupt)
104          */
105         asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));
106         S390_lowcore.cpu_data.cpu_addr = addr;
107
108         /*
109          * Force FPU initialization:
110          */
111         clear_thread_flag(TIF_USEDFPU);
112         clear_used_math();
113
114         atomic_inc(&init_mm.mm_count);
115         current->active_mm = &init_mm;
116         if (current->mm)
117                 BUG();
118         enter_lazy_tlb(&init_mm, current);
119 }
120
121 /*
122  * VM halt and poweroff setup routines
123  */
124 char vmhalt_cmd[128] = "";
125 char vmpoff_cmd[128] = "";
126
127 static inline void strncpy_skip_quote(char *dst, char *src, int n)
128 {
129         int sx, dx;
130
131         dx = 0;
132         for (sx = 0; src[sx] != 0; sx++) {
133                 if (src[sx] == '"') continue;
134                 dst[dx++] = src[sx];
135                 if (dx >= n) break;
136         }
137 }
138
139 static int __init vmhalt_setup(char *str)
140 {
141         strncpy_skip_quote(vmhalt_cmd, str, 127);
142         vmhalt_cmd[127] = 0;
143         return 1;
144 }
145
146 __setup("vmhalt=", vmhalt_setup);
147
148 static int __init vmpoff_setup(char *str)
149 {
150         strncpy_skip_quote(vmpoff_cmd, str, 127);
151         vmpoff_cmd[127] = 0;
152         return 1;
153 }
154
155 __setup("vmpoff=", vmpoff_setup);
156
157 /*
158  * condev= and conmode= setup parameter.
159  */
160
161 static int __init condev_setup(char *str)
162 {
163         int vdev;
164
165         vdev = simple_strtoul(str, &str, 0);
166         if (vdev >= 0 && vdev < 65536) {
167                 console_devno = vdev;
168                 console_irq = -1;
169         }
170         return 1;
171 }
172
173 __setup("condev=", condev_setup);
174
175 static int __init conmode_setup(char *str)
176 {
177 #if defined(CONFIG_SCLP_CONSOLE)
178         if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0)
179                 SET_CONSOLE_SCLP;
180 #endif
181 #if defined(CONFIG_TN3215_CONSOLE)
182         if (strncmp(str, "3215", 5) == 0)
183                 SET_CONSOLE_3215;
184 #endif
185 #if defined(CONFIG_TN3270_CONSOLE)
186         if (strncmp(str, "3270", 5) == 0)
187                 SET_CONSOLE_3270;
188 #endif
189         return 1;
190 }
191
192 __setup("conmode=", conmode_setup);
193
194 static void __init conmode_default(void)
195 {
196         char query_buffer[1024];
197         char *ptr;
198
199         if (MACHINE_IS_VM) {
200                 __cpcmd("QUERY CONSOLE", query_buffer, 1024);
201                 console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
202                 ptr = strstr(query_buffer, "SUBCHANNEL =");
203                 console_irq = simple_strtoul(ptr + 13, NULL, 16);
204                 __cpcmd("QUERY TERM", query_buffer, 1024);
205                 ptr = strstr(query_buffer, "CONMODE");
206                 /*
207                  * Set the conmode to 3215 so that the device recognition 
208                  * will set the cu_type of the console to 3215. If the
209                  * conmode is 3270 and we don't set it back then both
210                  * 3215 and the 3270 driver will try to access the console
211                  * device (3215 as console and 3270 as normal tty).
212                  */
213                 __cpcmd("TERM CONMODE 3215", NULL, 0);
214                 if (ptr == NULL) {
215 #if defined(CONFIG_SCLP_CONSOLE)
216                         SET_CONSOLE_SCLP;
217 #endif
218                         return;
219                 }
220                 if (strncmp(ptr + 8, "3270", 4) == 0) {
221 #if defined(CONFIG_TN3270_CONSOLE)
222                         SET_CONSOLE_3270;
223 #elif defined(CONFIG_TN3215_CONSOLE)
224                         SET_CONSOLE_3215;
225 #elif defined(CONFIG_SCLP_CONSOLE)
226                         SET_CONSOLE_SCLP;
227 #endif
228                 } else if (strncmp(ptr + 8, "3215", 4) == 0) {
229 #if defined(CONFIG_TN3215_CONSOLE)
230                         SET_CONSOLE_3215;
231 #elif defined(CONFIG_TN3270_CONSOLE)
232                         SET_CONSOLE_3270;
233 #elif defined(CONFIG_SCLP_CONSOLE)
234                         SET_CONSOLE_SCLP;
235 #endif
236                 }
237         } else if (MACHINE_IS_P390) {
238 #if defined(CONFIG_TN3215_CONSOLE)
239                 SET_CONSOLE_3215;
240 #elif defined(CONFIG_TN3270_CONSOLE)
241                 SET_CONSOLE_3270;
242 #endif
243         } else {
244 #if defined(CONFIG_SCLP_CONSOLE)
245                 SET_CONSOLE_SCLP;
246 #endif
247         }
248 }
249
250 #ifdef CONFIG_SMP
251 extern void machine_restart_smp(char *);
252 extern void machine_halt_smp(void);
253 extern void machine_power_off_smp(void);
254
255 void (*_machine_restart)(char *command) = machine_restart_smp;
256 void (*_machine_halt)(void) = machine_halt_smp;
257 void (*_machine_power_off)(void) = machine_power_off_smp;
258 #else
259 /*
260  * Reboot, halt and power_off routines for non SMP.
261  */
262 extern void reipl(unsigned long devno);
263 static void do_machine_restart_nonsmp(char * __unused)
264 {
265         if (MACHINE_IS_VM)
266                 cpcmd ("IPL", NULL, 0);
267         else
268                 reipl (0x10000 | S390_lowcore.ipl_device);
269 }
270
271 static void do_machine_halt_nonsmp(void)
272 {
273         if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
274                 cpcmd(vmhalt_cmd, NULL, 0);
275         signal_processor(smp_processor_id(), sigp_stop_and_store_status);
276 }
277
278 static void do_machine_power_off_nonsmp(void)
279 {
280         if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
281                 cpcmd(vmpoff_cmd, NULL, 0);
282         signal_processor(smp_processor_id(), sigp_stop_and_store_status);
283 }
284
285 void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;
286 void (*_machine_halt)(void) = do_machine_halt_nonsmp;
287 void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
288 #endif
289
290  /*
291  * Reboot, halt and power_off stubs. They just call _machine_restart,
292  * _machine_halt or _machine_power_off. 
293  */
294
295 void machine_restart(char *command)
296 {
297         console_unblank();
298         _machine_restart(command);
299 }
300
301 EXPORT_SYMBOL(machine_restart);
302
303 void machine_halt(void)
304 {
305         console_unblank();
306         _machine_halt();
307 }
308
309 EXPORT_SYMBOL(machine_halt);
310
311 void machine_power_off(void)
312 {
313         console_unblank();
314         _machine_power_off();
315 }
316
317 EXPORT_SYMBOL(machine_power_off);
318
319 static void __init
320 add_memory_hole(unsigned long start, unsigned long end)
321 {
322         unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
323
324         if (end <= dma_pfn)
325                 zholes_size[ZONE_DMA] += end - start + 1;
326         else if (start > dma_pfn)
327                 zholes_size[ZONE_NORMAL] += end - start + 1;
328         else {
329                 zholes_size[ZONE_DMA] += dma_pfn - start + 1;
330                 zholes_size[ZONE_NORMAL] += end - dma_pfn;
331         }
332 }
333
334 static void __init
335 parse_cmdline_early(char **cmdline_p)
336 {
337         char c = ' ', cn, *to = command_line, *from = COMMAND_LINE;
338         unsigned long delay = 0;
339
340         /* Save unparsed command line copy for /proc/cmdline */
341         memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
342         saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
343
344         for (;;) {
345                 /*
346                  * "mem=XXX[kKmM]" sets memsize
347                  */
348                 if (c == ' ' && strncmp(from, "mem=", 4) == 0) {
349                         memory_end = simple_strtoul(from+4, &from, 0);
350                         if ( *from == 'K' || *from == 'k' ) {
351                                 memory_end = memory_end << 10;
352                                 from++;
353                         } else if ( *from == 'M' || *from == 'm' ) {
354                                 memory_end = memory_end << 20;
355                                 from++;
356                         }
357                 }
358                 /*
359                  * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
360                  */
361                 if (c == ' ' && strncmp(from, "ipldelay=", 9) == 0) {
362                         delay = simple_strtoul(from+9, &from, 0);
363                         if (*from == 's' || *from == 'S') {
364                                 delay = delay*1000000;
365                                 from++;
366                         } else if (*from == 'm' || *from == 'M') {
367                                 delay = delay*60*1000000;
368                                 from++;
369                         }
370                         /* now wait for the requested amount of time */
371                         udelay(delay);
372                 }
373                 cn = *(from++);
374                 if (!cn)
375                         break;
376                 if (cn == '\n')
377                         cn = ' ';  /* replace newlines with space */
378                 if (cn == 0x0d)
379                         cn = ' ';  /* replace 0x0d with space */
380                 if (cn == ' ' && c == ' ')
381                         continue;  /* remove additional spaces */
382                 c = cn;
383                 if (to - command_line >= COMMAND_LINE_SIZE)
384                         break;
385                 *(to++) = c;
386         }
387         if (c == ' ' && to > command_line) to--;
388         *to = '\0';
389         *cmdline_p = command_line;
390 }
391
392 static void __init
393 setup_lowcore(void)
394 {
395         struct _lowcore *lc;
396         int lc_pages;
397
398         /*
399          * Setup lowcore for boot cpu
400          */
401         lc_pages = sizeof(void *) == 8 ? 2 : 1;
402         lc = (struct _lowcore *)
403                 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
404         memset(lc, 0, lc_pages * PAGE_SIZE);
405         lc->restart_psw.mask = PSW_BASE_BITS;
406         lc->restart_psw.addr =
407                 PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
408         lc->external_new_psw.mask = PSW_KERNEL_BITS;
409         lc->external_new_psw.addr =
410                 PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
411         lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT;
412         lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
413         lc->program_new_psw.mask = PSW_KERNEL_BITS;
414         lc->program_new_psw.addr =
415                 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
416         lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
417         lc->mcck_new_psw.addr =
418                 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
419         lc->io_new_psw.mask = PSW_KERNEL_BITS;
420         lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
421         lc->ipl_device = S390_lowcore.ipl_device;
422         lc->jiffy_timer = -1LL;
423         lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
424         lc->async_stack = (unsigned long)
425                 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
426 #ifdef CONFIG_CHECK_STACK
427         lc->panic_stack = (unsigned long)
428                 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
429 #endif
430         lc->current_task = (unsigned long) init_thread_union.thread_info.task;
431         lc->thread_info = (unsigned long) &init_thread_union;
432 #ifdef CONFIG_ARCH_S390X
433         if (MACHINE_HAS_DIAG44)
434                 lc->diag44_opcode = 0x83000044;
435         else
436                 lc->diag44_opcode = 0x07000700;
437 #endif /* CONFIG_ARCH_S390X */
438         set_prefix((u32)(unsigned long) lc);
439 }
440
441 static void __init
442 setup_resources(void)
443 {
444         struct resource *res;
445         int i;
446
447         for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
448                 res = alloc_bootmem_low(sizeof(struct resource));
449                 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
450                 switch (memory_chunk[i].type) {
451                 case CHUNK_READ_WRITE:
452                         res->name = "System RAM";
453                         break;
454                 case CHUNK_READ_ONLY:
455                         res->name = "System ROM";
456                         res->flags |= IORESOURCE_READONLY;
457                         break;
458                 default:
459                         res->name = "reserved";
460                 }
461                 res->start = memory_chunk[i].addr;
462                 res->end = memory_chunk[i].addr +  memory_chunk[i].size - 1;
463                 request_resource(&iomem_resource, res);
464                 request_resource(res, &code_resource);
465                 request_resource(res, &data_resource);
466         }
467 }
468
469 static void __init
470 setup_memory(void)
471 {
472         unsigned long bootmap_size;
473         unsigned long start_pfn, end_pfn;
474         unsigned long last_rw_end;
475         int i;
476
477         /*
478          * partially used pages are not usable - thus
479          * we are rounding upwards:
480          */
481         start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT;
482         end_pfn = max_pfn = memory_end >> PAGE_SHIFT;
483
484         /*
485          * Initialize the boot-time allocator (with low memory only):
486          */
487         bootmap_size = init_bootmem(start_pfn, end_pfn);
488
489         /*
490          * Register RAM areas with the bootmem allocator.
491          */
492         last_rw_end = start_pfn;
493
494         for (i = 0; i < 16 && memory_chunk[i].size > 0; i++) {
495                 unsigned long start_chunk, end_chunk;
496
497                 if (memory_chunk[i].type != CHUNK_READ_WRITE)
498                         continue;
499                 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
500                 start_chunk >>= PAGE_SHIFT;
501                 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
502                 end_chunk >>= PAGE_SHIFT;
503                 if (start_chunk < start_pfn)
504                         start_chunk = start_pfn;
505                 if (end_chunk > end_pfn)
506                         end_chunk = end_pfn;
507                 if (start_chunk < end_chunk) {
508                         free_bootmem(start_chunk << PAGE_SHIFT,
509                                      (end_chunk - start_chunk) << PAGE_SHIFT);
510                         if (last_rw_end < start_chunk)
511                                 add_memory_hole(last_rw_end, start_chunk - 1);
512                         last_rw_end = end_chunk;
513                 }
514         }
515
516         if (last_rw_end < end_pfn - 1)
517                 add_memory_hole(last_rw_end, end_pfn - 1);
518
519         /*
520          * Reserve the bootmem bitmap itself as well. We do this in two
521          * steps (first step was init_bootmem()) because this catches
522          * the (very unlikely) case of us accidentally initializing the
523          * bootmem allocator with an invalid RAM area.
524          */
525         reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
526
527 #ifdef CONFIG_BLK_DEV_INITRD
528         if (INITRD_START) {
529                 if (INITRD_START + INITRD_SIZE <= memory_end) {
530                         reserve_bootmem(INITRD_START, INITRD_SIZE);
531                         initrd_start = INITRD_START;
532                         initrd_end = initrd_start + INITRD_SIZE;
533                 } else {
534                         printk("initrd extends beyond end of memory "
535                                "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
536                                initrd_start + INITRD_SIZE, memory_end);
537                         initrd_start = initrd_end = 0;
538                 }
539         }
540 #endif
541 }
542
543 /*
544  * Setup function called from init/main.c just after the banner
545  * was printed.
546  */
547
548 void __init
549 setup_arch(char **cmdline_p)
550 {
551         /*
552          * print what head.S has found out about the machine
553          */
554 #ifndef CONFIG_ARCH_S390X
555         printk((MACHINE_IS_VM) ?
556                "We are running under VM (31 bit mode)\n" :
557                "We are running native (31 bit mode)\n");
558         printk((MACHINE_HAS_IEEE) ?
559                "This machine has an IEEE fpu\n" :
560                "This machine has no IEEE fpu\n");
561 #else /* CONFIG_ARCH_S390X */
562         printk((MACHINE_IS_VM) ?
563                "We are running under VM (64 bit mode)\n" :
564                "We are running native (64 bit mode)\n");
565 #endif /* CONFIG_ARCH_S390X */
566
567         ROOT_DEV = Root_RAM0;
568 #ifndef CONFIG_ARCH_S390X
569         memory_end = memory_size & ~0x400000UL;  /* align memory end to 4MB */
570         /*
571          * We need some free virtual space to be able to do vmalloc.
572          * On a machine with 2GB memory we make sure that we have at
573          * least 128 MB free space for vmalloc.
574          */
575         if (memory_end > 1920*1024*1024)
576                 memory_end = 1920*1024*1024;
577 #else /* CONFIG_ARCH_S390X */
578         memory_end = memory_size & ~0x200000UL;  /* detected in head.s */
579 #endif /* CONFIG_ARCH_S390X */
580
581         init_mm.start_code = PAGE_OFFSET;
582         init_mm.end_code = (unsigned long) &_etext;
583         init_mm.end_data = (unsigned long) &_edata;
584         init_mm.brk = (unsigned long) &_end;
585
586         parse_cmdline_early(cmdline_p);
587
588         setup_memory();
589         setup_resources();
590         setup_lowcore();
591
592         cpu_init();
593         __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
594
595         /*
596          * Create kernel page tables and switch to virtual addressing.
597          */
598         paging_init();
599
600         /* Setup default console */
601         conmode_default();
602 }
603
604 void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
605 {
606    printk("cpu %d "
607 #ifdef CONFIG_SMP
608            "phys_idx=%d "
609 #endif
610            "vers=%02X ident=%06X machine=%04X unused=%04X\n",
611            cpuinfo->cpu_nr,
612 #ifdef CONFIG_SMP
613            cpuinfo->cpu_addr,
614 #endif
615            cpuinfo->cpu_id.version,
616            cpuinfo->cpu_id.ident,
617            cpuinfo->cpu_id.machine,
618            cpuinfo->cpu_id.unused);
619 }
620
621 /*
622  * show_cpuinfo - Get information on one CPU for use by procfs.
623  */
624
625 static int show_cpuinfo(struct seq_file *m, void *v)
626 {
627         struct cpuinfo_S390 *cpuinfo;
628         unsigned long n = (unsigned long) v - 1;
629
630         if (!n) {
631                 seq_printf(m, "vendor_id       : IBM/S390\n"
632                                "# processors    : %i\n"
633                                "bogomips per cpu: %lu.%02lu\n",
634                                num_online_cpus(), loops_per_jiffy/(500000/HZ),
635                                (loops_per_jiffy/(5000/HZ))%100);
636         }
637         if (cpu_online(n)) {
638 #ifdef CONFIG_SMP
639                 if (smp_processor_id() == n)
640                         cpuinfo = &S390_lowcore.cpu_data;
641                 else
642                         cpuinfo = &lowcore_ptr[n]->cpu_data;
643 #else
644                 cpuinfo = &S390_lowcore.cpu_data;
645 #endif
646                 seq_printf(m, "processor %li: "
647                                "version = %02X,  "
648                                "identification = %06X,  "
649                                "machine = %04X\n",
650                                n, cpuinfo->cpu_id.version,
651                                cpuinfo->cpu_id.ident,
652                                cpuinfo->cpu_id.machine);
653         }
654         return 0;
655 }
656
657 static void *c_start(struct seq_file *m, loff_t *pos)
658 {
659         return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
660 }
661 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
662 {
663         ++*pos;
664         return c_start(m, pos);
665 }
666 static void c_stop(struct seq_file *m, void *v)
667 {
668 }
669 struct seq_operations cpuinfo_op = {
670         .start  = c_start,
671         .next   = c_next,
672         .stop   = c_stop,
673         .show   = show_cpuinfo,
674 };
675