2 * linux/arch/arm/kernel/setup.c
4 * Copyright (C) 1995-2001 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/stddef.h>
13 #include <linux/ioport.h>
14 #include <linux/delay.h>
15 #include <linux/utsname.h>
16 #include <linux/initrd.h>
17 #include <linux/console.h>
18 #include <linux/bootmem.h>
19 #include <linux/seq_file.h>
20 #include <linux/screen_info.h>
21 #include <linux/init.h>
22 #include <linux/root_dev.h>
23 #include <linux/cpu.h>
24 #include <linux/interrupt.h>
25 #include <linux/smp.h>
29 #include <asm/cputype.h>
31 #include <asm/procinfo.h>
32 #include <asm/setup.h>
33 #include <asm/mach-types.h>
34 #include <asm/cacheflush.h>
35 #include <asm/cachetype.h>
36 #include <asm/tlbflush.h>
38 #include <asm/mach/arch.h>
39 #include <asm/mach/irq.h>
40 #include <asm/mach/time.h>
41 #include <asm/traps.h>
47 #define MEM_SIZE (16*1024*1024)
50 #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
53 static int __init fpe_setup(char *line)
55 memcpy(fpe_type, line, 8);
59 __setup("fpe=", fpe_setup);
62 extern void paging_init(struct meminfo *, struct machine_desc *desc);
63 extern void reboot_setup(char *str);
64 extern int root_mountflags;
65 extern void _stext, _text, _etext, __data_start, _edata, _end;
67 unsigned int processor_id;
68 EXPORT_SYMBOL(processor_id);
69 unsigned int __machine_arch_type;
70 EXPORT_SYMBOL(__machine_arch_type);
72 unsigned int __atags_pointer __initdata;
74 unsigned int system_rev;
75 EXPORT_SYMBOL(system_rev);
77 unsigned int system_serial_low;
78 EXPORT_SYMBOL(system_serial_low);
80 unsigned int system_serial_high;
81 EXPORT_SYMBOL(system_serial_high);
83 unsigned int elf_hwcap;
84 EXPORT_SYMBOL(elf_hwcap);
86 unsigned long __initdata vmalloc_reserve = 128 << 20;
90 struct processor processor;
93 struct cpu_tlb_fns cpu_tlb;
96 struct cpu_user_fns cpu_user;
99 struct cpu_cache_fns cpu_cache;
101 #ifdef CONFIG_OUTER_CACHE
102 struct outer_cache_fns outer_cache;
109 } ____cacheline_aligned;
111 static struct stack stacks[NR_CPUS];
113 char elf_platform[ELF_PLATFORM_SIZE];
114 EXPORT_SYMBOL(elf_platform);
116 static struct meminfo meminfo __initdata = { 0, };
117 static const char *cpu_name;
118 static const char *machine_name;
119 static char __initdata command_line[COMMAND_LINE_SIZE];
121 static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
122 static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
123 #define ENDIANNESS ((char)endian_test.l)
125 DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
128 * Standard memory resources
130 static struct resource mem_res[] = {
135 .flags = IORESOURCE_MEM
138 .name = "Kernel text",
141 .flags = IORESOURCE_MEM
144 .name = "Kernel data",
147 .flags = IORESOURCE_MEM
151 #define video_ram mem_res[0]
152 #define kernel_code mem_res[1]
153 #define kernel_data mem_res[2]
155 static struct resource io_res[] = {
160 .flags = IORESOURCE_IO | IORESOURCE_BUSY
166 .flags = IORESOURCE_IO | IORESOURCE_BUSY
172 .flags = IORESOURCE_IO | IORESOURCE_BUSY
176 #define lp0 io_res[0]
177 #define lp1 io_res[1]
178 #define lp2 io_res[2]
180 static const char *cache_types[16] = {
199 static const char *cache_clean[16] = {
218 static const char *cache_lockdown[16] = {
237 static const char *proc_arch[] = {
257 #define CACHE_TYPE(x) (((x) >> 25) & 15)
258 #define CACHE_S(x) ((x) & (1 << 24))
259 #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */
260 #define CACHE_ISIZE(x) ((x) & 4095)
262 #define CACHE_SIZE(y) (((y) >> 6) & 7)
263 #define CACHE_ASSOC(y) (((y) >> 3) & 7)
264 #define CACHE_M(y) ((y) & (1 << 2))
265 #define CACHE_LINE(y) ((y) & 3)
267 static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
269 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
271 printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n",
273 mult << (8 + CACHE_SIZE(cache)),
274 (mult << CACHE_ASSOC(cache)) >> 1,
275 8 << CACHE_LINE(cache),
276 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
280 static void __init dump_cpu_info(int cpu)
282 unsigned int info = read_cpuid_cachetype();
284 if (info != read_cpuid_id()) {
285 printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
286 cache_types[CACHE_TYPE(info)]);
288 dump_cache("I cache", cpu, CACHE_ISIZE(info));
289 dump_cache("D cache", cpu, CACHE_DSIZE(info));
291 dump_cache("cache", cpu, CACHE_ISIZE(info));
295 if (arch_is_coherent())
296 printk("Cache coherency enabled\n");
299 int cpu_architecture(void)
303 if ((read_cpuid_id() & 0x0008f000) == 0) {
304 cpu_arch = CPU_ARCH_UNKNOWN;
305 } else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
306 cpu_arch = (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
307 } else if ((read_cpuid_id() & 0x00080000) == 0x00000000) {
308 cpu_arch = (read_cpuid_id() >> 16) & 7;
310 cpu_arch += CPU_ARCH_ARMv3;
311 } else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
314 /* Revised CPUID format. Read the Memory Model Feature
315 * Register 0 and check for VMSAv7 or PMSAv7 */
316 asm("mrc p15, 0, %0, c0, c1, 4"
318 if ((mmfr0 & 0x0000000f) == 0x00000003 ||
319 (mmfr0 & 0x000000f0) == 0x00000030)
320 cpu_arch = CPU_ARCH_ARMv7;
321 else if ((mmfr0 & 0x0000000f) == 0x00000002 ||
322 (mmfr0 & 0x000000f0) == 0x00000020)
323 cpu_arch = CPU_ARCH_ARMv6;
325 cpu_arch = CPU_ARCH_UNKNOWN;
327 cpu_arch = CPU_ARCH_UNKNOWN;
333 * These functions re-use the assembly code in head.S, which
334 * already provide the required functionality.
336 extern struct proc_info_list *lookup_processor_type(unsigned int);
337 extern struct machine_desc *lookup_machine_type(unsigned int);
339 static void __init setup_processor(void)
341 struct proc_info_list *list;
344 * locate processor in the list of supported processor
345 * types. The linker builds this table for us from the
346 * entries in arch/arm/mm/proc-*.S
348 list = lookup_processor_type(read_cpuid_id());
350 printk("CPU configuration botched (ID %08x), unable "
351 "to continue.\n", read_cpuid_id());
355 cpu_name = list->cpu_name;
358 processor = *list->proc;
361 cpu_tlb = *list->tlb;
364 cpu_user = *list->user;
367 cpu_cache = *list->cache;
370 printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
371 cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
372 proc_arch[cpu_architecture()], cr_alignment);
374 sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
375 sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
376 elf_hwcap = list->elf_hwcap;
377 #ifndef CONFIG_ARM_THUMB
378 elf_hwcap &= ~HWCAP_THUMB;
385 * cpu_init - initialise one CPU.
387 * cpu_init dumps the cache information, initialises SMP specific
388 * information, and sets up the per-CPU stacks.
392 unsigned int cpu = smp_processor_id();
393 struct stack *stk = &stacks[cpu];
395 if (cpu >= NR_CPUS) {
396 printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
400 if (system_state == SYSTEM_BOOTING)
404 * setup stacks for re-entrant exception handlers
416 "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
417 "I" (offsetof(struct stack, irq[0])),
418 "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
419 "I" (offsetof(struct stack, abt[0])),
420 "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE),
421 "I" (offsetof(struct stack, und[0])),
422 "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
426 static struct machine_desc * __init setup_machine(unsigned int nr)
428 struct machine_desc *list;
431 * locate machine in the list of supported machines.
433 list = lookup_machine_type(nr);
435 printk("Machine configuration botched (nr %d), unable "
436 "to continue.\n", nr);
440 printk("Machine: %s\n", list->name);
445 static void __init arm_add_memory(unsigned long start, unsigned long size)
447 struct membank *bank;
450 * Ensure that start/size are aligned to a page boundary.
451 * Size is appropriately rounded down, start is rounded up.
453 size -= start & ~PAGE_MASK;
455 bank = &meminfo.bank[meminfo.nr_banks++];
457 bank->start = PAGE_ALIGN(start);
458 bank->size = size & PAGE_MASK;
459 bank->node = PHYS_TO_NID(start);
463 * Pick out the memory size. We look for mem=size@start,
464 * where start and size are "size[KkMm]"
466 static void __init early_mem(char **p)
468 static int usermem __initdata = 0;
469 unsigned long size, start;
472 * If the user specifies memory size, we
473 * blow away any automatically generated
478 meminfo.nr_banks = 0;
482 size = memparse(*p, p);
484 start = memparse(*p + 1, p);
486 arm_add_memory(start, size);
488 __early_param("mem=", early_mem);
491 * vmalloc=size forces the vmalloc area to be exactly 'size'
492 * bytes. This can be used to increase (or decrease) the vmalloc
493 * area - the default is 128m.
495 static void __init early_vmalloc(char **arg)
497 vmalloc_reserve = memparse(*arg, arg);
499 __early_param("vmalloc=", early_vmalloc);
502 * Initial parsing of the command line.
504 static void __init parse_cmdline(char **cmdline_p, char *from)
506 char c = ' ', *to = command_line;
511 extern struct early_params __early_begin, __early_end;
512 struct early_params *p;
514 for (p = &__early_begin; p < &__early_end; p++) {
515 int arglen = strlen(p->arg);
517 if (memcmp(from, p->arg, arglen) == 0) {
518 if (to != command_line)
523 while (*from != ' ' && *from != '\0')
532 if (COMMAND_LINE_SIZE <= ++len)
537 *cmdline_p = command_line;
541 setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
543 #ifdef CONFIG_BLK_DEV_RAM
544 extern int rd_size, rd_image_start, rd_prompt, rd_doload;
546 rd_image_start = image_start;
556 request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
558 struct resource *res;
561 kernel_code.start = virt_to_phys(&_text);
562 kernel_code.end = virt_to_phys(&_etext - 1);
563 kernel_data.start = virt_to_phys(&__data_start);
564 kernel_data.end = virt_to_phys(&_end - 1);
566 for (i = 0; i < mi->nr_banks; i++) {
567 unsigned long virt_start, virt_end;
569 if (mi->bank[i].size == 0)
572 virt_start = __phys_to_virt(mi->bank[i].start);
573 virt_end = virt_start + mi->bank[i].size - 1;
575 res = alloc_bootmem_low(sizeof(*res));
576 res->name = "System RAM";
577 res->start = __virt_to_phys(virt_start);
578 res->end = __virt_to_phys(virt_end);
579 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
581 request_resource(&iomem_resource, res);
583 if (kernel_code.start >= res->start &&
584 kernel_code.end <= res->end)
585 request_resource(res, &kernel_code);
586 if (kernel_data.start >= res->start &&
587 kernel_data.end <= res->end)
588 request_resource(res, &kernel_data);
591 if (mdesc->video_start) {
592 video_ram.start = mdesc->video_start;
593 video_ram.end = mdesc->video_end;
594 request_resource(&iomem_resource, &video_ram);
598 * Some machines don't have the possibility of ever
599 * possessing lp0, lp1 or lp2
601 if (mdesc->reserve_lp0)
602 request_resource(&ioport_resource, &lp0);
603 if (mdesc->reserve_lp1)
604 request_resource(&ioport_resource, &lp1);
605 if (mdesc->reserve_lp2)
606 request_resource(&ioport_resource, &lp2);
612 * This is the new way of passing data to the kernel at boot time. Rather
613 * than passing a fixed inflexible structure to the kernel, we pass a list
614 * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
615 * tag for the list to be recognised (to distinguish the tagged list from
616 * a param_struct). The list is terminated with a zero-length tag (this tag
617 * is not parsed in any way).
619 static int __init parse_tag_core(const struct tag *tag)
621 if (tag->hdr.size > 2) {
622 if ((tag->u.core.flags & 1) == 0)
623 root_mountflags &= ~MS_RDONLY;
624 ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
629 __tagtable(ATAG_CORE, parse_tag_core);
631 static int __init parse_tag_mem32(const struct tag *tag)
633 if (meminfo.nr_banks >= NR_BANKS) {
635 "Ignoring memory bank 0x%08x size %dKB\n",
636 tag->u.mem.start, tag->u.mem.size / 1024);
639 arm_add_memory(tag->u.mem.start, tag->u.mem.size);
643 __tagtable(ATAG_MEM, parse_tag_mem32);
645 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
646 struct screen_info screen_info = {
647 .orig_video_lines = 30,
648 .orig_video_cols = 80,
649 .orig_video_mode = 0,
650 .orig_video_ega_bx = 0,
651 .orig_video_isVGA = 1,
652 .orig_video_points = 8
655 static int __init parse_tag_videotext(const struct tag *tag)
657 screen_info.orig_x = tag->u.videotext.x;
658 screen_info.orig_y = tag->u.videotext.y;
659 screen_info.orig_video_page = tag->u.videotext.video_page;
660 screen_info.orig_video_mode = tag->u.videotext.video_mode;
661 screen_info.orig_video_cols = tag->u.videotext.video_cols;
662 screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
663 screen_info.orig_video_lines = tag->u.videotext.video_lines;
664 screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
665 screen_info.orig_video_points = tag->u.videotext.video_points;
669 __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
672 static int __init parse_tag_ramdisk(const struct tag *tag)
674 setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
675 (tag->u.ramdisk.flags & 2) == 0,
676 tag->u.ramdisk.start, tag->u.ramdisk.size);
680 __tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
682 static int __init parse_tag_serialnr(const struct tag *tag)
684 system_serial_low = tag->u.serialnr.low;
685 system_serial_high = tag->u.serialnr.high;
689 __tagtable(ATAG_SERIAL, parse_tag_serialnr);
691 static int __init parse_tag_revision(const struct tag *tag)
693 system_rev = tag->u.revision.rev;
697 __tagtable(ATAG_REVISION, parse_tag_revision);
699 static int __init parse_tag_cmdline(const struct tag *tag)
701 strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
705 __tagtable(ATAG_CMDLINE, parse_tag_cmdline);
708 * Scan the tag table for this tag, and call its parse function.
709 * The tag table is built by the linker from all the __tagtable
712 static int __init parse_tag(const struct tag *tag)
714 extern struct tagtable __tagtable_begin, __tagtable_end;
717 for (t = &__tagtable_begin; t < &__tagtable_end; t++)
718 if (tag->hdr.tag == t->tag) {
723 return t < &__tagtable_end;
727 * Parse all tags in the list, checking both the global and architecture
728 * specific tag tables.
730 static void __init parse_tags(const struct tag *t)
732 for (; t->hdr.size; t = tag_next(t))
735 "Ignoring unrecognised tag 0x%08x\n",
740 * This holds our defaults.
742 static struct init_tags {
743 struct tag_header hdr1;
744 struct tag_core core;
745 struct tag_header hdr2;
746 struct tag_mem32 mem;
747 struct tag_header hdr3;
748 } init_tags __initdata = {
749 { tag_size(tag_core), ATAG_CORE },
750 { 1, PAGE_SIZE, 0xff },
751 { tag_size(tag_mem32), ATAG_MEM },
752 { MEM_SIZE, PHYS_OFFSET },
756 static void (*init_machine)(void) __initdata;
758 static int __init customize_machine(void)
760 /* customizes platform devices, or adds new ones */
765 arch_initcall(customize_machine);
767 void __init setup_arch(char **cmdline_p)
769 struct tag *tags = (struct tag *)&init_tags;
770 struct machine_desc *mdesc;
771 char *from = default_command_line;
774 mdesc = setup_machine(machine_arch_type);
775 machine_name = mdesc->name;
777 if (mdesc->soft_reboot)
781 tags = phys_to_virt(__atags_pointer);
782 else if (mdesc->boot_params)
783 tags = phys_to_virt(mdesc->boot_params);
786 * If we have the old style parameters, convert them to
789 if (tags->hdr.tag != ATAG_CORE)
790 convert_to_tag_list(tags);
791 if (tags->hdr.tag != ATAG_CORE)
792 tags = (struct tag *)&init_tags;
795 mdesc->fixup(mdesc, tags, &from, &meminfo);
797 if (tags->hdr.tag == ATAG_CORE) {
798 if (meminfo.nr_banks != 0)
799 squash_mem_tags(tags);
804 init_mm.start_code = (unsigned long) &_text;
805 init_mm.end_code = (unsigned long) &_etext;
806 init_mm.end_data = (unsigned long) &_edata;
807 init_mm.brk = (unsigned long) &_end;
809 memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
810 boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
811 parse_cmdline(cmdline_p, from);
812 paging_init(&meminfo, mdesc);
813 request_standard_resources(&meminfo, mdesc);
822 * Set up various architecture-specific pointers
824 init_arch_irq = mdesc->init_irq;
825 system_timer = mdesc->timer;
826 init_machine = mdesc->init_machine;
829 #if defined(CONFIG_VGA_CONSOLE)
830 conswitchp = &vga_con;
831 #elif defined(CONFIG_DUMMY_CONSOLE)
832 conswitchp = &dummy_con;
839 static int __init topology_init(void)
843 for_each_possible_cpu(cpu) {
844 struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu);
845 cpuinfo->cpu.hotpluggable = 1;
846 register_cpu(&cpuinfo->cpu, cpu);
852 subsys_initcall(topology_init);
854 static const char *hwcap_str[] = {
870 c_show_cache(struct seq_file *m, const char *type, unsigned int cache)
872 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
874 seq_printf(m, "%s size\t\t: %d\n"
876 "%s line length\t: %d\n"
878 type, mult << (8 + CACHE_SIZE(cache)),
879 type, (mult << CACHE_ASSOC(cache)) >> 1,
880 type, 8 << CACHE_LINE(cache),
881 type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
885 static int c_show(struct seq_file *m, void *v)
889 seq_printf(m, "Processor\t: %s rev %d (%s)\n",
890 cpu_name, read_cpuid_id() & 15, elf_platform);
892 #if defined(CONFIG_SMP)
893 for_each_online_cpu(i) {
895 * glibc reads /proc/cpuinfo to determine the number of
896 * online processors, looking for lines beginning with
897 * "processor". Give glibc what it expects.
899 seq_printf(m, "processor\t: %d\n", i);
900 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
901 per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
902 (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
904 #else /* CONFIG_SMP */
905 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
906 loops_per_jiffy / (500000/HZ),
907 (loops_per_jiffy / (5000/HZ)) % 100);
910 /* dump out the processor features */
911 seq_puts(m, "Features\t: ");
913 for (i = 0; hwcap_str[i]; i++)
914 if (elf_hwcap & (1 << i))
915 seq_printf(m, "%s ", hwcap_str[i]);
917 seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
918 seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
920 if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
922 seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
924 if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
926 seq_printf(m, "CPU variant\t: 0x%02x\n",
927 (read_cpuid_id() >> 16) & 127);
930 seq_printf(m, "CPU variant\t: 0x%x\n",
931 (read_cpuid_id() >> 20) & 15);
933 seq_printf(m, "CPU part\t: 0x%03x\n",
934 (read_cpuid_id() >> 4) & 0xfff);
936 seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
939 unsigned int cache_info = read_cpuid_cachetype();
940 if (cache_info != read_cpuid_id()) {
941 seq_printf(m, "Cache type\t: %s\n"
942 "Cache clean\t: %s\n"
943 "Cache lockdown\t: %s\n"
944 "Cache format\t: %s\n",
945 cache_types[CACHE_TYPE(cache_info)],
946 cache_clean[CACHE_TYPE(cache_info)],
947 cache_lockdown[CACHE_TYPE(cache_info)],
948 CACHE_S(cache_info) ? "Harvard" : "Unified");
950 if (CACHE_S(cache_info)) {
951 c_show_cache(m, "I", CACHE_ISIZE(cache_info));
952 c_show_cache(m, "D", CACHE_DSIZE(cache_info));
954 c_show_cache(m, "Cache", CACHE_ISIZE(cache_info));
961 seq_printf(m, "Hardware\t: %s\n", machine_name);
962 seq_printf(m, "Revision\t: %04x\n", system_rev);
963 seq_printf(m, "Serial\t\t: %08x%08x\n",
964 system_serial_high, system_serial_low);
969 static void *c_start(struct seq_file *m, loff_t *pos)
971 return *pos < 1 ? (void *)1 : NULL;
974 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
980 static void c_stop(struct seq_file *m, void *v)
984 const struct seq_operations cpuinfo_op = {