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/kexec.h>
23 #include <linux/crash_dump.h>
24 #include <linux/root_dev.h>
25 #include <linux/cpu.h>
26 #include <linux/interrupt.h>
27 #include <linux/smp.h>
29 #include <linux/proc_fs.h>
30 #include <linux/memblock.h>
32 #include <asm/unified.h>
34 #include <asm/cputype.h>
36 #include <asm/procinfo.h>
37 #include <asm/sections.h>
38 #include <asm/setup.h>
39 #include <asm/smp_plat.h>
40 #include <asm/mach-types.h>
41 #include <asm/cacheflush.h>
42 #include <asm/cachetype.h>
43 #include <asm/tlbflush.h>
45 #include <asm/mach/arch.h>
46 #include <asm/mach/irq.h>
47 #include <asm/mach/time.h>
48 #include <asm/traps.h>
49 #include <asm/unwind.h>
51 #if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
58 #define MEM_SIZE (16*1024*1024)
61 #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
64 static int __init fpe_setup(char *line)
66 memcpy(fpe_type, line, 8);
70 __setup("fpe=", fpe_setup);
73 extern void paging_init(struct machine_desc *desc);
74 extern void reboot_setup(char *str);
76 unsigned int processor_id;
77 EXPORT_SYMBOL(processor_id);
78 unsigned int __machine_arch_type __read_mostly;
79 EXPORT_SYMBOL(__machine_arch_type);
80 unsigned int cacheid __read_mostly;
81 EXPORT_SYMBOL(cacheid);
83 unsigned int __atags_pointer __initdata;
85 unsigned int system_rev;
86 EXPORT_SYMBOL(system_rev);
88 unsigned int system_serial_low;
89 EXPORT_SYMBOL(system_serial_low);
91 unsigned int system_serial_high;
92 EXPORT_SYMBOL(system_serial_high);
94 unsigned int elf_hwcap __read_mostly;
95 EXPORT_SYMBOL(elf_hwcap);
99 struct processor processor __read_mostly;
102 struct cpu_tlb_fns cpu_tlb __read_mostly;
105 struct cpu_user_fns cpu_user __read_mostly;
108 struct cpu_cache_fns cpu_cache __read_mostly;
110 #ifdef CONFIG_OUTER_CACHE
111 struct outer_cache_fns outer_cache __read_mostly;
112 EXPORT_SYMBOL(outer_cache);
119 } ____cacheline_aligned;
121 static struct stack stacks[NR_CPUS];
123 char elf_platform[ELF_PLATFORM_SIZE];
124 EXPORT_SYMBOL(elf_platform);
126 static const char *cpu_name;
127 static const char *machine_name;
128 static char __initdata cmd_line[COMMAND_LINE_SIZE];
129 struct machine_desc *machine_desc __initdata;
131 static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
132 static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
133 #define ENDIANNESS ((char)endian_test.l)
135 DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
138 * Standard memory resources
140 static struct resource mem_res[] = {
145 .flags = IORESOURCE_MEM
148 .name = "Kernel text",
151 .flags = IORESOURCE_MEM
154 .name = "Kernel data",
157 .flags = IORESOURCE_MEM
161 #define video_ram mem_res[0]
162 #define kernel_code mem_res[1]
163 #define kernel_data mem_res[2]
165 static struct resource io_res[] = {
170 .flags = IORESOURCE_IO | IORESOURCE_BUSY
176 .flags = IORESOURCE_IO | IORESOURCE_BUSY
182 .flags = IORESOURCE_IO | IORESOURCE_BUSY
186 #define lp0 io_res[0]
187 #define lp1 io_res[1]
188 #define lp2 io_res[2]
190 static const char *proc_arch[] = {
210 int cpu_architecture(void)
214 if ((read_cpuid_id() & 0x0008f000) == 0) {
215 cpu_arch = CPU_ARCH_UNKNOWN;
216 } else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
217 cpu_arch = (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
218 } else if ((read_cpuid_id() & 0x00080000) == 0x00000000) {
219 cpu_arch = (read_cpuid_id() >> 16) & 7;
221 cpu_arch += CPU_ARCH_ARMv3;
222 } else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
225 /* Revised CPUID format. Read the Memory Model Feature
226 * Register 0 and check for VMSAv7 or PMSAv7 */
227 asm("mrc p15, 0, %0, c0, c1, 4"
229 if ((mmfr0 & 0x0000000f) >= 0x00000003 ||
230 (mmfr0 & 0x000000f0) >= 0x00000030)
231 cpu_arch = CPU_ARCH_ARMv7;
232 else if ((mmfr0 & 0x0000000f) == 0x00000002 ||
233 (mmfr0 & 0x000000f0) == 0x00000020)
234 cpu_arch = CPU_ARCH_ARMv6;
236 cpu_arch = CPU_ARCH_UNKNOWN;
238 cpu_arch = CPU_ARCH_UNKNOWN;
243 static int cpu_has_aliasing_icache(unsigned int arch)
246 unsigned int id_reg, num_sets, line_size;
248 /* arch specifies the register format */
251 asm("mcr p15, 2, %0, c0, c0, 0 @ set CSSELR"
252 : /* No output operands */
255 asm("mrc p15, 1, %0, c0, c0, 0 @ read CCSIDR"
257 line_size = 4 << ((id_reg & 0x7) + 2);
258 num_sets = ((id_reg >> 13) & 0x7fff) + 1;
259 aliasing_icache = (line_size * num_sets) > PAGE_SIZE;
262 aliasing_icache = read_cpuid_cachetype() & (1 << 11);
265 /* I-cache aliases will be handled by D-cache aliasing code */
269 return aliasing_icache;
272 static void __init cacheid_init(void)
274 unsigned int cachetype = read_cpuid_cachetype();
275 unsigned int arch = cpu_architecture();
277 if (arch >= CPU_ARCH_ARMv6) {
278 if ((cachetype & (7 << 29)) == 4 << 29) {
279 /* ARMv7 register format */
280 cacheid = CACHEID_VIPT_NONALIASING;
281 if ((cachetype & (3 << 14)) == 1 << 14)
282 cacheid |= CACHEID_ASID_TAGGED;
283 else if (cpu_has_aliasing_icache(CPU_ARCH_ARMv7))
284 cacheid |= CACHEID_VIPT_I_ALIASING;
285 } else if (cachetype & (1 << 23)) {
286 cacheid = CACHEID_VIPT_ALIASING;
288 cacheid = CACHEID_VIPT_NONALIASING;
289 if (cpu_has_aliasing_icache(CPU_ARCH_ARMv6))
290 cacheid |= CACHEID_VIPT_I_ALIASING;
293 cacheid = CACHEID_VIVT;
296 printk("CPU: %s data cache, %s instruction cache\n",
297 cache_is_vivt() ? "VIVT" :
298 cache_is_vipt_aliasing() ? "VIPT aliasing" :
299 cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown",
300 cache_is_vivt() ? "VIVT" :
301 icache_is_vivt_asid_tagged() ? "VIVT ASID tagged" :
302 icache_is_vipt_aliasing() ? "VIPT aliasing" :
303 cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown");
307 * These functions re-use the assembly code in head.S, which
308 * already provide the required functionality.
310 extern struct proc_info_list *lookup_processor_type(unsigned int);
312 static void __init early_print(const char *str, ...)
314 extern void printascii(const char *);
319 vsnprintf(buf, sizeof(buf), str, ap);
322 #ifdef CONFIG_DEBUG_LL
328 static void __init feat_v6_fixup(void)
330 int id = read_cpuid_id();
332 if ((id & 0xff0f0000) != 0x41070000)
336 * HWCAP_TLS is available only on 1136 r1p0 and later,
337 * see also kuser_get_tls_init.
339 if ((((id >> 4) & 0xfff) == 0xb36) && (((id >> 20) & 3) == 0))
340 elf_hwcap &= ~HWCAP_TLS;
343 static void __init setup_processor(void)
345 struct proc_info_list *list;
348 * locate processor in the list of supported processor
349 * types. The linker builds this table for us from the
350 * entries in arch/arm/mm/proc-*.S
352 list = lookup_processor_type(read_cpuid_id());
354 printk("CPU configuration botched (ID %08x), unable "
355 "to continue.\n", read_cpuid_id());
359 cpu_name = list->cpu_name;
362 processor = *list->proc;
365 cpu_tlb = *list->tlb;
368 cpu_user = *list->user;
371 cpu_cache = *list->cache;
374 printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
375 cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
376 proc_arch[cpu_architecture()], cr_alignment);
378 sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
379 sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
380 elf_hwcap = list->elf_hwcap;
381 #ifndef CONFIG_ARM_THUMB
382 elf_hwcap &= ~HWCAP_THUMB;
392 * cpu_init - initialise one CPU.
394 * cpu_init sets up the per-CPU stacks.
398 unsigned int cpu = smp_processor_id();
399 struct stack *stk = &stacks[cpu];
401 if (cpu >= NR_CPUS) {
402 printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
407 * Define the placement constraint for the inline asm directive below.
408 * In Thumb-2, msr with an immediate value is not allowed.
410 #ifdef CONFIG_THUMB2_KERNEL
417 * setup stacks for re-entrant exception handlers
421 "add r14, %0, %2\n\t"
424 "add r14, %0, %4\n\t"
427 "add r14, %0, %6\n\t"
432 PLC (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
433 "I" (offsetof(struct stack, irq[0])),
434 PLC (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
435 "I" (offsetof(struct stack, abt[0])),
436 PLC (PSR_F_BIT | PSR_I_BIT | UND_MODE),
437 "I" (offsetof(struct stack, und[0])),
438 PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
442 static struct machine_desc * __init setup_machine(unsigned int nr)
444 extern struct machine_desc __arch_info_begin[], __arch_info_end[];
445 struct machine_desc *p;
448 * locate machine in the list of supported machines.
450 for (p = __arch_info_begin; p < __arch_info_end; p++)
452 printk("Machine: %s\n", p->name);
457 "Error: unrecognized/unsupported machine ID (r1 = 0x%08x).\n\n"
458 "Available machine support:\n\nID (hex)\tNAME\n", nr);
460 for (p = __arch_info_begin; p < __arch_info_end; p++)
461 early_print("%08x\t%s\n", p->nr, p->name);
463 early_print("\nPlease check your kernel config and/or bootloader.\n");
466 /* can't use cpu_relax() here as it may require MMU setup */;
469 static int __init arm_add_memory(phys_addr_t start, unsigned long size)
471 struct membank *bank = &meminfo.bank[meminfo.nr_banks];
473 if (meminfo.nr_banks >= NR_BANKS) {
474 printk(KERN_CRIT "NR_BANKS too low, "
475 "ignoring memory at 0x%08llx\n", (long long)start);
480 * Ensure that start/size are aligned to a page boundary.
481 * Size is appropriately rounded down, start is rounded up.
483 size -= start & ~PAGE_MASK;
484 bank->start = PAGE_ALIGN(start);
485 bank->size = size & PAGE_MASK;
488 * Check whether this memory region has non-zero size or
489 * invalid node number.
499 * Pick out the memory size. We look for mem=size@start,
500 * where start and size are "size[KkMm]"
502 static int __init early_mem(char *p)
504 static int usermem __initdata = 0;
510 * If the user specifies memory size, we
511 * blow away any automatically generated
516 meminfo.nr_banks = 0;
520 size = memparse(p, &endp);
522 start = memparse(endp + 1, NULL);
524 arm_add_memory(start, size);
528 early_param("mem", early_mem);
531 setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
533 #ifdef CONFIG_BLK_DEV_RAM
534 extern int rd_size, rd_image_start, rd_prompt, rd_doload;
536 rd_image_start = image_start;
545 static void __init request_standard_resources(struct machine_desc *mdesc)
547 struct memblock_region *region;
548 struct resource *res;
550 kernel_code.start = virt_to_phys(_text);
551 kernel_code.end = virt_to_phys(_etext - 1);
552 kernel_data.start = virt_to_phys(_sdata);
553 kernel_data.end = virt_to_phys(_end - 1);
555 for_each_memblock(memory, region) {
556 res = alloc_bootmem_low(sizeof(*res));
557 res->name = "System RAM";
558 res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
559 res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
560 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
562 request_resource(&iomem_resource, res);
564 if (kernel_code.start >= res->start &&
565 kernel_code.end <= res->end)
566 request_resource(res, &kernel_code);
567 if (kernel_data.start >= res->start &&
568 kernel_data.end <= res->end)
569 request_resource(res, &kernel_data);
572 if (mdesc->video_start) {
573 video_ram.start = mdesc->video_start;
574 video_ram.end = mdesc->video_end;
575 request_resource(&iomem_resource, &video_ram);
579 * Some machines don't have the possibility of ever
580 * possessing lp0, lp1 or lp2
582 if (mdesc->reserve_lp0)
583 request_resource(&ioport_resource, &lp0);
584 if (mdesc->reserve_lp1)
585 request_resource(&ioport_resource, &lp1);
586 if (mdesc->reserve_lp2)
587 request_resource(&ioport_resource, &lp2);
593 * This is the new way of passing data to the kernel at boot time. Rather
594 * than passing a fixed inflexible structure to the kernel, we pass a list
595 * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
596 * tag for the list to be recognised (to distinguish the tagged list from
597 * a param_struct). The list is terminated with a zero-length tag (this tag
598 * is not parsed in any way).
600 static int __init parse_tag_core(const struct tag *tag)
602 if (tag->hdr.size > 2) {
603 if ((tag->u.core.flags & 1) == 0)
604 root_mountflags &= ~MS_RDONLY;
605 ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
610 __tagtable(ATAG_CORE, parse_tag_core);
612 static int __init parse_tag_mem32(const struct tag *tag)
614 return arm_add_memory(tag->u.mem.start, tag->u.mem.size);
617 __tagtable(ATAG_MEM, parse_tag_mem32);
619 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
620 struct screen_info screen_info = {
621 .orig_video_lines = 30,
622 .orig_video_cols = 80,
623 .orig_video_mode = 0,
624 .orig_video_ega_bx = 0,
625 .orig_video_isVGA = 1,
626 .orig_video_points = 8
629 static int __init parse_tag_videotext(const struct tag *tag)
631 screen_info.orig_x = tag->u.videotext.x;
632 screen_info.orig_y = tag->u.videotext.y;
633 screen_info.orig_video_page = tag->u.videotext.video_page;
634 screen_info.orig_video_mode = tag->u.videotext.video_mode;
635 screen_info.orig_video_cols = tag->u.videotext.video_cols;
636 screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
637 screen_info.orig_video_lines = tag->u.videotext.video_lines;
638 screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
639 screen_info.orig_video_points = tag->u.videotext.video_points;
643 __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
646 static int __init parse_tag_ramdisk(const struct tag *tag)
648 setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
649 (tag->u.ramdisk.flags & 2) == 0,
650 tag->u.ramdisk.start, tag->u.ramdisk.size);
654 __tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
656 static int __init parse_tag_serialnr(const struct tag *tag)
658 system_serial_low = tag->u.serialnr.low;
659 system_serial_high = tag->u.serialnr.high;
663 __tagtable(ATAG_SERIAL, parse_tag_serialnr);
665 static int __init parse_tag_revision(const struct tag *tag)
667 system_rev = tag->u.revision.rev;
671 __tagtable(ATAG_REVISION, parse_tag_revision);
673 static int __init parse_tag_cmdline(const struct tag *tag)
675 #ifndef CONFIG_CMDLINE_FORCE
676 strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
678 pr_warning("Ignoring tag cmdline (using the default kernel command line)\n");
679 #endif /* CONFIG_CMDLINE_FORCE */
683 __tagtable(ATAG_CMDLINE, parse_tag_cmdline);
686 * Scan the tag table for this tag, and call its parse function.
687 * The tag table is built by the linker from all the __tagtable
690 static int __init parse_tag(const struct tag *tag)
692 extern struct tagtable __tagtable_begin, __tagtable_end;
695 for (t = &__tagtable_begin; t < &__tagtable_end; t++)
696 if (tag->hdr.tag == t->tag) {
701 return t < &__tagtable_end;
705 * Parse all tags in the list, checking both the global and architecture
706 * specific tag tables.
708 static void __init parse_tags(const struct tag *t)
710 for (; t->hdr.size; t = tag_next(t))
713 "Ignoring unrecognised tag 0x%08x\n",
718 * This holds our defaults.
720 static struct init_tags {
721 struct tag_header hdr1;
722 struct tag_core core;
723 struct tag_header hdr2;
724 struct tag_mem32 mem;
725 struct tag_header hdr3;
726 } init_tags __initdata = {
727 { tag_size(tag_core), ATAG_CORE },
728 { 1, PAGE_SIZE, 0xff },
729 { tag_size(tag_mem32), ATAG_MEM },
734 static int __init customize_machine(void)
736 /* customizes platform devices, or adds new ones */
737 if (machine_desc->init_machine)
738 machine_desc->init_machine();
741 arch_initcall(customize_machine);
744 static inline unsigned long long get_total_mem(void)
748 total = max_low_pfn - min_low_pfn;
749 return total << PAGE_SHIFT;
753 * reserve_crashkernel() - reserves memory are for crash kernel
755 * This function reserves memory area given in "crashkernel=" kernel command
756 * line parameter. The memory reserved is used by a dump capture kernel when
757 * primary kernel is crashing.
759 static void __init reserve_crashkernel(void)
761 unsigned long long crash_size, crash_base;
762 unsigned long long total_mem;
765 total_mem = get_total_mem();
766 ret = parse_crashkernel(boot_command_line, total_mem,
767 &crash_size, &crash_base);
771 ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
773 printk(KERN_WARNING "crashkernel reservation failed - "
774 "memory is in use (0x%lx)\n", (unsigned long)crash_base);
778 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
779 "for crashkernel (System RAM: %ldMB)\n",
780 (unsigned long)(crash_size >> 20),
781 (unsigned long)(crash_base >> 20),
782 (unsigned long)(total_mem >> 20));
784 crashk_res.start = crash_base;
785 crashk_res.end = crash_base + crash_size - 1;
786 insert_resource(&iomem_resource, &crashk_res);
789 static inline void reserve_crashkernel(void) {}
790 #endif /* CONFIG_KEXEC */
792 static void __init squash_mem_tags(struct tag *tag)
794 for (; tag->hdr.size; tag = tag_next(tag))
795 if (tag->hdr.tag == ATAG_MEM)
796 tag->hdr.tag = ATAG_NONE;
799 void __init setup_arch(char **cmdline_p)
801 struct tag *tags = (struct tag *)&init_tags;
802 struct machine_desc *mdesc;
803 char *from = default_command_line;
805 init_tags.mem.start = PHYS_OFFSET;
810 mdesc = setup_machine(machine_arch_type);
811 machine_desc = mdesc;
812 machine_name = mdesc->name;
814 if (mdesc->soft_reboot)
818 tags = phys_to_virt(__atags_pointer);
819 else if (mdesc->boot_params) {
822 * We still are executing with a minimal MMU mapping created
823 * with the presumption that the machine default for this
824 * is located in the first MB of RAM. Anything else will
825 * fault and silently hang the kernel at this point.
827 if (mdesc->boot_params < PHYS_OFFSET ||
828 mdesc->boot_params >= PHYS_OFFSET + SZ_1M) {
830 "Default boot params at physical 0x%08lx out of reach\n",
835 tags = phys_to_virt(mdesc->boot_params);
839 #if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
841 * If we have the old style parameters, convert them to
844 if (tags->hdr.tag != ATAG_CORE)
845 convert_to_tag_list(tags);
847 if (tags->hdr.tag != ATAG_CORE)
848 tags = (struct tag *)&init_tags;
851 mdesc->fixup(mdesc, tags, &from, &meminfo);
853 if (tags->hdr.tag == ATAG_CORE) {
854 if (meminfo.nr_banks != 0)
855 squash_mem_tags(tags);
860 init_mm.start_code = (unsigned long) _text;
861 init_mm.end_code = (unsigned long) _etext;
862 init_mm.end_data = (unsigned long) _edata;
863 init_mm.brk = (unsigned long) _end;
865 /* parse_early_param needs a boot_command_line */
866 strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
868 /* populate cmd_line too for later use, preserving boot_command_line */
869 strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
870 *cmdline_p = cmd_line;
874 arm_memblock_init(&meminfo, mdesc);
877 request_standard_resources(mdesc);
883 reserve_crashkernel();
888 #ifdef CONFIG_MULTI_IRQ_HANDLER
889 handle_arch_irq = mdesc->handle_irq;
893 #if defined(CONFIG_VGA_CONSOLE)
894 conswitchp = &vga_con;
895 #elif defined(CONFIG_DUMMY_CONSOLE)
896 conswitchp = &dummy_con;
901 if (mdesc->init_early)
906 static int __init topology_init(void)
910 for_each_possible_cpu(cpu) {
911 struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu);
912 cpuinfo->cpu.hotpluggable = 1;
913 register_cpu(&cpuinfo->cpu, cpu);
918 subsys_initcall(topology_init);
920 #ifdef CONFIG_HAVE_PROC_CPU
921 static int __init proc_cpu_init(void)
923 struct proc_dir_entry *res;
925 res = proc_mkdir("cpu", NULL);
930 fs_initcall(proc_cpu_init);
933 static const char *hwcap_str[] = {
952 static int c_show(struct seq_file *m, void *v)
956 seq_printf(m, "Processor\t: %s rev %d (%s)\n",
957 cpu_name, read_cpuid_id() & 15, elf_platform);
959 #if defined(CONFIG_SMP)
960 for_each_online_cpu(i) {
962 * glibc reads /proc/cpuinfo to determine the number of
963 * online processors, looking for lines beginning with
964 * "processor". Give glibc what it expects.
966 seq_printf(m, "processor\t: %d\n", i);
967 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
968 per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
969 (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
971 #else /* CONFIG_SMP */
972 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
973 loops_per_jiffy / (500000/HZ),
974 (loops_per_jiffy / (5000/HZ)) % 100);
977 /* dump out the processor features */
978 seq_puts(m, "Features\t: ");
980 for (i = 0; hwcap_str[i]; i++)
981 if (elf_hwcap & (1 << i))
982 seq_printf(m, "%s ", hwcap_str[i]);
984 seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
985 seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
987 if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
989 seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
991 if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
993 seq_printf(m, "CPU variant\t: 0x%02x\n",
994 (read_cpuid_id() >> 16) & 127);
997 seq_printf(m, "CPU variant\t: 0x%x\n",
998 (read_cpuid_id() >> 20) & 15);
1000 seq_printf(m, "CPU part\t: 0x%03x\n",
1001 (read_cpuid_id() >> 4) & 0xfff);
1003 seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
1007 seq_printf(m, "Hardware\t: %s\n", machine_name);
1008 seq_printf(m, "Revision\t: %04x\n", system_rev);
1009 seq_printf(m, "Serial\t\t: %08x%08x\n",
1010 system_serial_high, system_serial_low);
1015 static void *c_start(struct seq_file *m, loff_t *pos)
1017 return *pos < 1 ? (void *)1 : NULL;
1020 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1026 static void c_stop(struct seq_file *m, void *v)
1030 const struct seq_operations cpuinfo_op = {