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>
27 #include <linux/kexec.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/tlbflush.h>
37 #include <asm/mach/arch.h>
38 #include <asm/mach/irq.h>
39 #include <asm/mach/time.h>
44 #define MEM_SIZE (16*1024*1024)
47 #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
50 static int __init fpe_setup(char *line)
52 memcpy(fpe_type, line, 8);
56 __setup("fpe=", fpe_setup);
59 extern void paging_init(struct meminfo *, struct machine_desc *desc);
60 extern void reboot_setup(char *str);
61 extern int root_mountflags;
62 extern void _stext, _text, _etext, __data_start, _edata, _end;
64 unsigned int processor_id;
65 unsigned int __machine_arch_type;
66 EXPORT_SYMBOL(__machine_arch_type);
68 unsigned int __atags_pointer __initdata;
70 unsigned int system_rev;
71 EXPORT_SYMBOL(system_rev);
73 unsigned int system_serial_low;
74 EXPORT_SYMBOL(system_serial_low);
76 unsigned int system_serial_high;
77 EXPORT_SYMBOL(system_serial_high);
79 unsigned int elf_hwcap;
80 EXPORT_SYMBOL(elf_hwcap);
84 struct processor processor;
87 struct cpu_tlb_fns cpu_tlb;
90 struct cpu_user_fns cpu_user;
93 struct cpu_cache_fns cpu_cache;
95 #ifdef CONFIG_OUTER_CACHE
96 struct outer_cache_fns outer_cache;
103 } ____cacheline_aligned;
105 static struct stack stacks[NR_CPUS];
107 char elf_platform[ELF_PLATFORM_SIZE];
108 EXPORT_SYMBOL(elf_platform);
110 unsigned long phys_initrd_start __initdata = 0;
111 unsigned long phys_initrd_size __initdata = 0;
113 static struct meminfo meminfo __initdata = { 0, };
114 static const char *cpu_name;
115 static const char *machine_name;
116 static char __initdata command_line[COMMAND_LINE_SIZE];
118 static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
119 static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
120 #define ENDIANNESS ((char)endian_test.l)
122 DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
125 * Standard memory resources
127 static struct resource mem_res[] = {
132 .flags = IORESOURCE_MEM
135 .name = "Kernel text",
138 .flags = IORESOURCE_MEM
141 .name = "Kernel data",
144 .flags = IORESOURCE_MEM
148 #define video_ram mem_res[0]
149 #define kernel_code mem_res[1]
150 #define kernel_data mem_res[2]
152 static struct resource io_res[] = {
157 .flags = IORESOURCE_IO | IORESOURCE_BUSY
163 .flags = IORESOURCE_IO | IORESOURCE_BUSY
169 .flags = IORESOURCE_IO | IORESOURCE_BUSY
173 #define lp0 io_res[0]
174 #define lp1 io_res[1]
175 #define lp2 io_res[2]
177 static const char *cache_types[16] = {
196 static const char *cache_clean[16] = {
215 static const char *cache_lockdown[16] = {
234 static const char *proc_arch[] = {
254 #define CACHE_TYPE(x) (((x) >> 25) & 15)
255 #define CACHE_S(x) ((x) & (1 << 24))
256 #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */
257 #define CACHE_ISIZE(x) ((x) & 4095)
259 #define CACHE_SIZE(y) (((y) >> 6) & 7)
260 #define CACHE_ASSOC(y) (((y) >> 3) & 7)
261 #define CACHE_M(y) ((y) & (1 << 2))
262 #define CACHE_LINE(y) ((y) & 3)
264 static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
266 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
268 printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n",
270 mult << (8 + CACHE_SIZE(cache)),
271 (mult << CACHE_ASSOC(cache)) >> 1,
272 8 << CACHE_LINE(cache),
273 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
277 static void __init dump_cpu_info(int cpu)
279 unsigned int info = read_cpuid(CPUID_CACHETYPE);
281 if (info != processor_id) {
282 printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
283 cache_types[CACHE_TYPE(info)]);
285 dump_cache("I cache", cpu, CACHE_ISIZE(info));
286 dump_cache("D cache", cpu, CACHE_DSIZE(info));
288 dump_cache("cache", cpu, CACHE_ISIZE(info));
292 if (arch_is_coherent())
293 printk("Cache coherency enabled\n");
296 int cpu_architecture(void)
300 if ((processor_id & 0x0008f000) == 0) {
301 cpu_arch = CPU_ARCH_UNKNOWN;
302 } else if ((processor_id & 0x0008f000) == 0x00007000) {
303 cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
304 } else if ((processor_id & 0x00080000) == 0x00000000) {
305 cpu_arch = (processor_id >> 16) & 7;
307 cpu_arch += CPU_ARCH_ARMv3;
308 } else if ((processor_id & 0x000f0000) == 0x000f0000) {
311 /* Revised CPUID format. Read the Memory Model Feature
312 * Register 0 and check for VMSAv7 or PMSAv7 */
313 asm("mrc p15, 0, %0, c0, c1, 4"
315 if ((mmfr0 & 0x0000000f) == 0x00000003 ||
316 (mmfr0 & 0x000000f0) == 0x00000030)
317 cpu_arch = CPU_ARCH_ARMv7;
318 else if ((mmfr0 & 0x0000000f) == 0x00000002 ||
319 (mmfr0 & 0x000000f0) == 0x00000020)
320 cpu_arch = CPU_ARCH_ARMv6;
322 cpu_arch = CPU_ARCH_UNKNOWN;
324 cpu_arch = CPU_ARCH_UNKNOWN;
330 * These functions re-use the assembly code in head.S, which
331 * already provide the required functionality.
333 extern struct proc_info_list *lookup_processor_type(unsigned int);
334 extern struct machine_desc *lookup_machine_type(unsigned int);
336 static void __init setup_processor(void)
338 struct proc_info_list *list;
341 * locate processor in the list of supported processor
342 * types. The linker builds this table for us from the
343 * entries in arch/arm/mm/proc-*.S
345 list = lookup_processor_type(processor_id);
347 printk("CPU configuration botched (ID %08x), unable "
348 "to continue.\n", processor_id);
352 cpu_name = list->cpu_name;
355 processor = *list->proc;
358 cpu_tlb = *list->tlb;
361 cpu_user = *list->user;
364 cpu_cache = *list->cache;
367 printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
368 cpu_name, processor_id, (int)processor_id & 15,
369 proc_arch[cpu_architecture()], cr_alignment);
371 sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
372 sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
373 elf_hwcap = list->elf_hwcap;
374 #ifndef CONFIG_ARM_THUMB
375 elf_hwcap &= ~HWCAP_THUMB;
382 * cpu_init - initialise one CPU.
384 * cpu_init dumps the cache information, initialises SMP specific
385 * information, and sets up the per-CPU stacks.
389 unsigned int cpu = smp_processor_id();
390 struct stack *stk = &stacks[cpu];
392 if (cpu >= NR_CPUS) {
393 printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
397 if (system_state == SYSTEM_BOOTING)
401 * setup stacks for re-entrant exception handlers
413 "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
414 "I" (offsetof(struct stack, irq[0])),
415 "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
416 "I" (offsetof(struct stack, abt[0])),
417 "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE),
418 "I" (offsetof(struct stack, und[0])),
419 "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
423 static struct machine_desc * __init setup_machine(unsigned int nr)
425 struct machine_desc *list;
428 * locate machine in the list of supported machines.
430 list = lookup_machine_type(nr);
432 printk("Machine configuration botched (nr %d), unable "
433 "to continue.\n", nr);
437 printk("Machine: %s\n", list->name);
442 static void __init early_initrd(char **p)
444 unsigned long start, size;
446 start = memparse(*p, p);
448 size = memparse((*p) + 1, p);
450 phys_initrd_start = start;
451 phys_initrd_size = size;
454 __early_param("initrd=", early_initrd);
456 static void __init arm_add_memory(unsigned long start, unsigned long size)
458 struct membank *bank;
461 * Ensure that start/size are aligned to a page boundary.
462 * Size is appropriately rounded down, start is rounded up.
464 size -= start & ~PAGE_MASK;
466 bank = &meminfo.bank[meminfo.nr_banks++];
468 bank->start = PAGE_ALIGN(start);
469 bank->size = size & PAGE_MASK;
470 bank->node = PHYS_TO_NID(start);
474 * Pick out the memory size. We look for mem=size@start,
475 * where start and size are "size[KkMm]"
477 static void __init early_mem(char **p)
479 static int usermem __initdata = 0;
480 unsigned long size, start;
483 * If the user specifies memory size, we
484 * blow away any automatically generated
489 meminfo.nr_banks = 0;
493 size = memparse(*p, p);
495 start = memparse(*p + 1, p);
497 arm_add_memory(start, size);
499 __early_param("mem=", early_mem);
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 len = strlen(p->arg);
517 if (memcmp(from, p->arg, len) == 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_initrd(const struct tag *tag)
684 printk(KERN_WARNING "ATAG_INITRD is deprecated; "
685 "please update your bootloader.\n");
686 phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
687 phys_initrd_size = tag->u.initrd.size;
691 __tagtable(ATAG_INITRD, parse_tag_initrd);
693 static int __init parse_tag_initrd2(const struct tag *tag)
695 phys_initrd_start = tag->u.initrd.start;
696 phys_initrd_size = tag->u.initrd.size;
700 __tagtable(ATAG_INITRD2, parse_tag_initrd2);
702 static int __init parse_tag_serialnr(const struct tag *tag)
704 system_serial_low = tag->u.serialnr.low;
705 system_serial_high = tag->u.serialnr.high;
709 __tagtable(ATAG_SERIAL, parse_tag_serialnr);
711 static int __init parse_tag_revision(const struct tag *tag)
713 system_rev = tag->u.revision.rev;
717 __tagtable(ATAG_REVISION, parse_tag_revision);
719 static int __init parse_tag_cmdline(const struct tag *tag)
721 strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
725 __tagtable(ATAG_CMDLINE, parse_tag_cmdline);
728 * Scan the tag table for this tag, and call its parse function.
729 * The tag table is built by the linker from all the __tagtable
732 static int __init parse_tag(const struct tag *tag)
734 extern struct tagtable __tagtable_begin, __tagtable_end;
737 for (t = &__tagtable_begin; t < &__tagtable_end; t++)
738 if (tag->hdr.tag == t->tag) {
743 return t < &__tagtable_end;
747 * Parse all tags in the list, checking both the global and architecture
748 * specific tag tables.
750 static void __init parse_tags(const struct tag *t)
752 for (; t->hdr.size; t = tag_next(t))
755 "Ignoring unrecognised tag 0x%08x\n",
760 * This holds our defaults.
762 static struct init_tags {
763 struct tag_header hdr1;
764 struct tag_core core;
765 struct tag_header hdr2;
766 struct tag_mem32 mem;
767 struct tag_header hdr3;
768 } init_tags __initdata = {
769 { tag_size(tag_core), ATAG_CORE },
770 { 1, PAGE_SIZE, 0xff },
771 { tag_size(tag_mem32), ATAG_MEM },
772 { MEM_SIZE, PHYS_OFFSET },
776 static void (*init_machine)(void) __initdata;
778 static int __init customize_machine(void)
780 /* customizes platform devices, or adds new ones */
785 arch_initcall(customize_machine);
789 /* Physical addr of where the boot params should be for this machine */
790 extern unsigned long kexec_boot_params_address;
792 /* Physical addr of the buffer into which the boot params are copied */
793 extern unsigned long kexec_boot_params_copy;
795 /* Pointer to the boot params buffer, for manipulation and display */
796 unsigned long kexec_boot_params;
797 EXPORT_SYMBOL(kexec_boot_params);
799 /* The buffer itself - make sure it is sized correctly */
800 static unsigned long kexec_boot_params_buf[(KEXEC_BOOT_PARAMS_SIZE + 3) / 4];
804 void __init setup_arch(char **cmdline_p)
806 struct tag *tags = (struct tag *)&init_tags;
807 struct machine_desc *mdesc;
808 char *from = default_command_line;
811 mdesc = setup_machine(machine_arch_type);
812 machine_name = mdesc->name;
814 if (mdesc->soft_reboot)
818 tags = phys_to_virt(__atags_pointer);
819 else if (mdesc->boot_params)
820 tags = phys_to_virt(mdesc->boot_params);
823 kexec_boot_params_copy = virt_to_phys(kexec_boot_params_buf);
824 kexec_boot_params = (unsigned long)kexec_boot_params_buf;
825 if (__atags_pointer) {
826 kexec_boot_params_address = __atags_pointer;
827 memcpy((void *)kexec_boot_params, tags, KEXEC_BOOT_PARAMS_SIZE);
828 } else if (mdesc->boot_params) {
829 kexec_boot_params_address = mdesc->boot_params;
830 memcpy((void *)kexec_boot_params, tags, KEXEC_BOOT_PARAMS_SIZE);
835 * If we have the old style parameters, convert them to
838 if (tags->hdr.tag != ATAG_CORE)
839 convert_to_tag_list(tags);
840 if (tags->hdr.tag != ATAG_CORE)
841 tags = (struct tag *)&init_tags;
844 mdesc->fixup(mdesc, tags, &from, &meminfo);
846 if (tags->hdr.tag == ATAG_CORE) {
847 if (meminfo.nr_banks != 0)
848 squash_mem_tags(tags);
852 init_mm.start_code = (unsigned long) &_text;
853 init_mm.end_code = (unsigned long) &_etext;
854 init_mm.end_data = (unsigned long) &_edata;
855 init_mm.brk = (unsigned long) &_end;
857 memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
858 boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
859 parse_cmdline(cmdline_p, from);
860 paging_init(&meminfo, mdesc);
861 request_standard_resources(&meminfo, mdesc);
870 * Set up various architecture-specific pointers
872 init_arch_irq = mdesc->init_irq;
873 system_timer = mdesc->timer;
874 init_machine = mdesc->init_machine;
877 #if defined(CONFIG_VGA_CONSOLE)
878 conswitchp = &vga_con;
879 #elif defined(CONFIG_DUMMY_CONSOLE)
880 conswitchp = &dummy_con;
886 static int __init topology_init(void)
890 for_each_possible_cpu(cpu) {
891 struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu);
892 cpuinfo->cpu.hotpluggable = 1;
893 register_cpu(&cpuinfo->cpu, cpu);
899 subsys_initcall(topology_init);
901 static const char *hwcap_str[] = {
917 c_show_cache(struct seq_file *m, const char *type, unsigned int cache)
919 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
921 seq_printf(m, "%s size\t\t: %d\n"
923 "%s line length\t: %d\n"
925 type, mult << (8 + CACHE_SIZE(cache)),
926 type, (mult << CACHE_ASSOC(cache)) >> 1,
927 type, 8 << CACHE_LINE(cache),
928 type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
932 static int c_show(struct seq_file *m, void *v)
936 seq_printf(m, "Processor\t: %s rev %d (%s)\n",
937 cpu_name, (int)processor_id & 15, elf_platform);
939 #if defined(CONFIG_SMP)
940 for_each_online_cpu(i) {
942 * glibc reads /proc/cpuinfo to determine the number of
943 * online processors, looking for lines beginning with
944 * "processor". Give glibc what it expects.
946 seq_printf(m, "processor\t: %d\n", i);
947 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
948 per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
949 (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
951 #else /* CONFIG_SMP */
952 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
953 loops_per_jiffy / (500000/HZ),
954 (loops_per_jiffy / (5000/HZ)) % 100);
957 /* dump out the processor features */
958 seq_puts(m, "Features\t: ");
960 for (i = 0; hwcap_str[i]; i++)
961 if (elf_hwcap & (1 << i))
962 seq_printf(m, "%s ", hwcap_str[i]);
964 seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24);
965 seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
967 if ((processor_id & 0x0008f000) == 0x00000000) {
969 seq_printf(m, "CPU part\t: %07x\n", processor_id >> 4);
971 if ((processor_id & 0x0008f000) == 0x00007000) {
973 seq_printf(m, "CPU variant\t: 0x%02x\n",
974 (processor_id >> 16) & 127);
977 seq_printf(m, "CPU variant\t: 0x%x\n",
978 (processor_id >> 20) & 15);
980 seq_printf(m, "CPU part\t: 0x%03x\n",
981 (processor_id >> 4) & 0xfff);
983 seq_printf(m, "CPU revision\t: %d\n", processor_id & 15);
986 unsigned int cache_info = read_cpuid(CPUID_CACHETYPE);
987 if (cache_info != processor_id) {
988 seq_printf(m, "Cache type\t: %s\n"
989 "Cache clean\t: %s\n"
990 "Cache lockdown\t: %s\n"
991 "Cache format\t: %s\n",
992 cache_types[CACHE_TYPE(cache_info)],
993 cache_clean[CACHE_TYPE(cache_info)],
994 cache_lockdown[CACHE_TYPE(cache_info)],
995 CACHE_S(cache_info) ? "Harvard" : "Unified");
997 if (CACHE_S(cache_info)) {
998 c_show_cache(m, "I", CACHE_ISIZE(cache_info));
999 c_show_cache(m, "D", CACHE_DSIZE(cache_info));
1001 c_show_cache(m, "Cache", CACHE_ISIZE(cache_info));
1008 seq_printf(m, "Hardware\t: %s\n", machine_name);
1009 seq_printf(m, "Revision\t: %04x\n", system_rev);
1010 seq_printf(m, "Serial\t\t: %08x%08x\n",
1011 system_serial_high, system_serial_low);
1016 static void *c_start(struct seq_file *m, loff_t *pos)
1018 return *pos < 1 ? (void *)1 : NULL;
1021 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1027 static void c_stop(struct seq_file *m, void *v)
1031 struct seq_operations cpuinfo_op = {