Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 875 insertions, 0 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
new file mode 100644
index 000000000000..c2a7da3ac0f1
--- /dev/null
+++ b/arch/arm/kernel/setup.c
@@ -0,0 +1,875 @@
+/*
+ *  linux/arch/arm/kernel/setup.c
+ *
+ *  Copyright (C) 1995-2001 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/utsname.h>
+#include <linux/initrd.h>
+#include <linux/console.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+#include <linux/root_dev.h>
+#include <linux/cpu.h>
+#include <linux/interrupt.h>
+
+#include <asm/cpu.h>
+#include <asm/elf.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/procinfo.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/time.h>
+
+#ifndef MEM_SIZE
+#define MEM_SIZE        (16*1024*1024)
+#endif
+
+#if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
+char fpe_type[8];
+
+static int __init fpe_setup(char *line)
+{
+        memcpy(fpe_type, line, 8);
+        return 1;
+}
+
+__setup("fpe=", fpe_setup);
+#endif
+
+extern unsigned int mem_fclk_21285;
+extern void paging_init(struct meminfo *, struct machine_desc *desc);
+extern void convert_to_tag_list(struct tag *tags);
+extern void squash_mem_tags(struct tag *tag);
+extern void reboot_setup(char *str);
+extern int root_mountflags;
+extern void _stext, _text, _etext, __data_start, _edata, _end;
+
+unsigned int processor_id;
+unsigned int __machine_arch_type;
+EXPORT_SYMBOL(__machine_arch_type);
+
+unsigned int system_rev;
+EXPORT_SYMBOL(system_rev);
+
+unsigned int system_serial_low;
+EXPORT_SYMBOL(system_serial_low);
+
+unsigned int system_serial_high;
+EXPORT_SYMBOL(system_serial_high);
+
+unsigned int elf_hwcap;
+EXPORT_SYMBOL(elf_hwcap);
+
+
+#ifdef MULTI_CPU
+struct processor processor;
+#endif
+#ifdef MULTI_TLB
+struct cpu_tlb_fns cpu_tlb;
+#endif
+#ifdef MULTI_USER
+struct cpu_user_fns cpu_user;
+#endif
+#ifdef MULTI_CACHE
+struct cpu_cache_fns cpu_cache;
+#endif
+
+char elf_platform[ELF_PLATFORM_SIZE];
+EXPORT_SYMBOL(elf_platform);
+
+unsigned long phys_initrd_start __initdata = 0;
+unsigned long phys_initrd_size __initdata = 0;
+
+static struct meminfo meminfo __initdata = { 0, };
+static const char *cpu_name;
+static const char *machine_name;
+static char command_line[COMMAND_LINE_SIZE];
+
+static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
+static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
+#define ENDIANNESS ((char)endian_test.l)
+
+DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
+
+/*
+ * Standard memory resources
+ */
+static struct resource mem_res[] = {
+        { "Video RAM",   0,     0,     IORESOURCE_MEM                   },
+        { "Kernel text", 0,     0,     IORESOURCE_MEM                   },
+        { "Kernel data", 0,     0,     IORESOURCE_MEM                   }
+};
+
+#define video_ram   mem_res[0]
+#define kernel_code mem_res[1]
+#define kernel_data mem_res[2]
+
+static struct resource io_res[] = {
+        { "reserved",    0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY },
+        { "reserved",    0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY },
+        { "reserved",    0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY }
+};
+
+#define lp0 io_res[0]
+#define lp1 io_res[1]
+#define lp2 io_res[2]
+
+static const char *cache_types[16] = {
+        "write-through",
+        "write-back",
+        "write-back",
+        "undefined 3",
+        "undefined 4",
+        "undefined 5",
+        "write-back",
+        "write-back",
+        "undefined 8",
+        "undefined 9",
+        "undefined 10",
+        "undefined 11",
+        "undefined 12",
+        "undefined 13",
+        "write-back",
+        "undefined 15",
+};
+
+static const char *cache_clean[16] = {
+        "not required",
+        "read-block",
+        "cp15 c7 ops",
+        "undefined 3",
+        "undefined 4",
+        "undefined 5",
+        "cp15 c7 ops",
+        "cp15 c7 ops",
+        "undefined 8",
+        "undefined 9",
+        "undefined 10",
+        "undefined 11",
+        "undefined 12",
+        "undefined 13",
+        "cp15 c7 ops",
+        "undefined 15",
+};
+
+static const char *cache_lockdown[16] = {
+        "not supported",
+        "not supported",
+        "not supported",
+        "undefined 3",
+        "undefined 4",
+        "undefined 5",
+        "format A",
+        "format B",
+        "undefined 8",
+        "undefined 9",
+        "undefined 10",
+        "undefined 11",
+        "undefined 12",
+        "undefined 13",
+        "format C",
+        "undefined 15",
+};
+
+static const char *proc_arch[] = {
+        "undefined/unknown",
+        "3",
+        "4",
+        "4T",
+        "5",
+        "5T",
+        "5TE",
+        "5TEJ",
+        "6TEJ",
+        "?(10)",
+        "?(11)",
+        "?(12)",
+        "?(13)",
+        "?(14)",
+        "?(15)",
+        "?(16)",
+        "?(17)",
+};
+
+#define CACHE_TYPE(x)   (((x) >> 25) & 15)
+#define CACHE_S(x)      ((x) & (1 << 24))
+#define CACHE_DSIZE(x)  (((x) >> 12) & 4095)    /* only if S=1 */
+#define CACHE_ISIZE(x)  ((x) & 4095)
+
+#define CACHE_SIZE(y)   (((y) >> 6) & 7)
+#define CACHE_ASSOC(y)  (((y) >> 3) & 7)
+#define CACHE_M(y)      ((y) & (1 << 2))
+#define CACHE_LINE(y)   ((y) & 3)
+
+static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
+{
+        unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
+
+        printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n",
+                cpu, prefix,
+                mult << (8 + CACHE_SIZE(cache)),
+                (mult << CACHE_ASSOC(cache)) >> 1,
+                8 << CACHE_LINE(cache),
+                1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
+                        CACHE_LINE(cache)));
+}
+
+static void __init dump_cpu_info(int cpu)
+{
+        unsigned int info = read_cpuid(CPUID_CACHETYPE);
+
+        if (info != processor_id) {
+                printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
+                       cache_types[CACHE_TYPE(info)]);
+                if (CACHE_S(info)) {
+                        dump_cache("I cache", cpu, CACHE_ISIZE(info));
+                        dump_cache("D cache", cpu, CACHE_DSIZE(info));
+                } else {
+                        dump_cache("cache", cpu, CACHE_ISIZE(info));
+                }
+        }
+}
+
+int cpu_architecture(void)
+{
+        int cpu_arch;
+
+        if ((processor_id & 0x0000f000) == 0) {
+                cpu_arch = CPU_ARCH_UNKNOWN;
+        } else if ((processor_id & 0x0000f000) == 0x00007000) {
+                cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
+        } else {
+                cpu_arch = (processor_id >> 16) & 7;
+                if (cpu_arch)
+                        cpu_arch += CPU_ARCH_ARMv3;
+        }
+
+        return cpu_arch;
+}
+
+/*
+ * These functions re-use the assembly code in head.S, which
+ * already provide the required functionality.
+ */
+extern struct proc_info_list *lookup_processor_type(void);
+extern struct machine_desc *lookup_machine_type(unsigned int);
+
+static void __init setup_processor(void)
+{
+        struct proc_info_list *list;
+
+        /*
+         * locate processor in the list of supported processor
+         * types.  The linker builds this table for us from the
+         * entries in arch/arm/mm/proc-*.S
+         */
+        list = lookup_processor_type();
+        if (!list) {
+                printk("CPU configuration botched (ID %08x), unable "
+                       "to continue.\n", processor_id);
+                while (1);
+        }
+
+        cpu_name = list->cpu_name;
+
+#ifdef MULTI_CPU
+        processor = *list->proc;
+#endif
+#ifdef MULTI_TLB
+        cpu_tlb = *list->tlb;
+#endif
+#ifdef MULTI_USER
+        cpu_user = *list->user;
+#endif
+#ifdef MULTI_CACHE
+        cpu_cache = *list->cache;
+#endif
+
+        printk("CPU: %s [%08x] revision %d (ARMv%s)\n",
+               cpu_name, processor_id, (int)processor_id & 15,
+               proc_arch[cpu_architecture()]);
+
+        dump_cpu_info(smp_processor_id());
+
+        sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS);
+        sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
+        elf_hwcap = list->elf_hwcap;
+
+        cpu_proc_init();
+}
+
+static struct machine_desc * __init setup_machine(unsigned int nr)
+{
+        struct machine_desc *list;
+
+        /*
+         * locate machine in the list of supported machines.
+         */
+        list = lookup_machine_type(nr);
+        if (!list) {
+                printk("Machine configuration botched (nr %d), unable "
+                       "to continue.\n", nr);
+                while (1);
+        }
+
+        printk("Machine: %s\n", list->name);
+
+        return list;
+}
+
+static void __init early_initrd(char **p)
+{
+        unsigned long start, size;
+
+        start = memparse(*p, p);
+        if (**p == ',') {
+                size = memparse((*p) + 1, p);
+
+                phys_initrd_start = start;
+                phys_initrd_size = size;
+        }
+}
+__early_param("initrd=", early_initrd);
+
+/*
+ * Pick out the memory size.  We look for mem=size@start,
+ * where start and size are "size[KkMm]"
+ */
+static void __init early_mem(char **p)
+{
+        static int usermem __initdata = 0;
+        unsigned long size, start;
+
+        /*
+         * If the user specifies memory size, we
+         * blow away any automatically generated
+         * size.
+         */
+        if (usermem == 0) {
+                usermem = 1;
+                meminfo.nr_banks = 0;
+        }
+
+        start = PHYS_OFFSET;
+        size  = memparse(*p, p);
+        if (**p == '@')
+                start = memparse(*p + 1, p);
+
+        meminfo.bank[meminfo.nr_banks].start = start;
+        meminfo.bank[meminfo.nr_banks].size  = size;
+        meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(start);
+        meminfo.nr_banks += 1;
+}
+__early_param("mem=", early_mem);
+
+/*
+ * Initial parsing of the command line.
+ */
+static void __init parse_cmdline(char **cmdline_p, char *from)
+{
+        char c = ' ', *to = command_line;
+        int len = 0;
+
+        for (;;) {
+                if (c == ' ') {
+                        extern struct early_params __early_begin, __early_end;
+                        struct early_params *p;
+
+                        for (p = &__early_begin; p < &__early_end; p++) {
+                                int len = strlen(p->arg);
+
+                                if (memcmp(from, p->arg, len) == 0) {
+                                        if (to != command_line)
+                                                to -= 1;
+                                        from += len;
+                                        p->fn(&from);
+
+                                        while (*from != ' ' && *from != '\0')
+                                                from++;
+                                        break;
+                                }
+                        }
+                }
+                c = *from++;
+                if (!c)
+                        break;
+                if (COMMAND_LINE_SIZE <= ++len)
+                        break;
+                *to++ = c;
+        }
+        *to = '\0';
+        *cmdline_p = command_line;
+}
+
+static void __init
+setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
+{
+#ifdef CONFIG_BLK_DEV_RAM
+        extern int rd_size, rd_image_start, rd_prompt, rd_doload;
+
+        rd_image_start = image_start;
+        rd_prompt = prompt;
+        rd_doload = doload;
+
+        if (rd_sz)
+                rd_size = rd_sz;
+#endif
+}
+
+static void __init
+request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
+{
+        struct resource *res;
+        int i;
+
+        kernel_code.start   = virt_to_phys(&_text);
+        kernel_code.end     = virt_to_phys(&_etext - 1);
+        kernel_data.start   = virt_to_phys(&__data_start);
+        kernel_data.end     = virt_to_phys(&_end - 1);
+
+        for (i = 0; i < mi->nr_banks; i++) {
+                unsigned long virt_start, virt_end;
+
+                if (mi->bank[i].size == 0)
+                        continue;
+
+                virt_start = __phys_to_virt(mi->bank[i].start);
+                virt_end   = virt_start + mi->bank[i].size - 1;
+
+                res = alloc_bootmem_low(sizeof(*res));
+                res->name  = "System RAM";
+                res->start = __virt_to_phys(virt_start);
+                res->end   = __virt_to_phys(virt_end);
+                res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+                request_resource(&iomem_resource, res);
+
+                if (kernel_code.start >= res->start &&
+                    kernel_code.end <= res->end)
+                        request_resource(res, &kernel_code);
+                if (kernel_data.start >= res->start &&
+                    kernel_data.end <= res->end)
+                        request_resource(res, &kernel_data);
+        }
+
+        if (mdesc->video_start) {
+                video_ram.start = mdesc->video_start;
+                video_ram.end   = mdesc->video_end;
+                request_resource(&iomem_resource, &video_ram);
+        }
+
+        /*
+         * Some machines don't have the possibility of ever
+         * possessing lp0, lp1 or lp2
+         */
+        if (mdesc->reserve_lp0)
+                request_resource(&ioport_resource, &lp0);
+        if (mdesc->reserve_lp1)
+                request_resource(&ioport_resource, &lp1);
+        if (mdesc->reserve_lp2)
+                request_resource(&ioport_resource, &lp2);
+}
+
+/*
+ *  Tag parsing.
+ *
+ * This is the new way of passing data to the kernel at boot time.  Rather
+ * than passing a fixed inflexible structure to the kernel, we pass a list
+ * of variable-sized tags to the kernel.  The first tag must be a ATAG_CORE
+ * tag for the list to be recognised (to distinguish the tagged list from
+ * a param_struct).  The list is terminated with a zero-length tag (this tag
+ * is not parsed in any way).
+ */
+static int __init parse_tag_core(const struct tag *tag)
+{
+        if (tag->hdr.size > 2) {
+                if ((tag->u.core.flags & 1) == 0)
+                        root_mountflags &= ~MS_RDONLY;
+                ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
+        }
+        return 0;
+}
+
+__tagtable(ATAG_CORE, parse_tag_core);
+
+static int __init parse_tag_mem32(const struct tag *tag)
+{
+        if (meminfo.nr_banks >= NR_BANKS) {
+                printk(KERN_WARNING
+                       "Ignoring memory bank 0x%08x size %dKB\n",
+                        tag->u.mem.start, tag->u.mem.size / 1024);
+                return -EINVAL;
+        }
+        meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start;
+        meminfo.bank[meminfo.nr_banks].size  = tag->u.mem.size;
+        meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(tag->u.mem.start);
+        meminfo.nr_banks += 1;
+
+        return 0;
+}
+
+__tagtable(ATAG_MEM, parse_tag_mem32);
+
+#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
+struct screen_info screen_info = {
+ .orig_video_lines      = 30,
+ .orig_video_cols       = 80,
+ .orig_video_mode       = 0,
+ .orig_video_ega_bx     = 0,
+ .orig_video_isVGA      = 1,
+ .orig_video_points     = 8
+};
+
+static int __init parse_tag_videotext(const struct tag *tag)
+{
+        screen_info.orig_x            = tag->u.videotext.x;
+        screen_info.orig_y            = tag->u.videotext.y;
+        screen_info.orig_video_page   = tag->u.videotext.video_page;
+        screen_info.orig_video_mode   = tag->u.videotext.video_mode;
+        screen_info.orig_video_cols   = tag->u.videotext.video_cols;
+        screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
+        screen_info.orig_video_lines  = tag->u.videotext.video_lines;
+        screen_info.orig_video_isVGA  = tag->u.videotext.video_isvga;
+        screen_info.orig_video_points = tag->u.videotext.video_points;
+        return 0;
+}
+
+__tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
+#endif
+
+static int __init parse_tag_ramdisk(const struct tag *tag)
+{
+        setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
+                      (tag->u.ramdisk.flags & 2) == 0,
+                      tag->u.ramdisk.start, tag->u.ramdisk.size);
+        return 0;
+}
+
+__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
+
+static int __init parse_tag_initrd(const struct tag *tag)
+{
+        printk(KERN_WARNING "ATAG_INITRD is deprecated; "
+                "please update your bootloader.\n");
+        phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
+        phys_initrd_size = tag->u.initrd.size;
+        return 0;
+}
+
+__tagtable(ATAG_INITRD, parse_tag_initrd);
+
+static int __init parse_tag_initrd2(const struct tag *tag)
+{
+        phys_initrd_start = tag->u.initrd.start;
+        phys_initrd_size = tag->u.initrd.size;
+        return 0;
+}
+
+__tagtable(ATAG_INITRD2, parse_tag_initrd2);
+
+static int __init parse_tag_serialnr(const struct tag *tag)
+{
+        system_serial_low = tag->u.serialnr.low;
+        system_serial_high = tag->u.serialnr.high;
+        return 0;
+}
+
+__tagtable(ATAG_SERIAL, parse_tag_serialnr);
+
+static int __init parse_tag_revision(const struct tag *tag)
+{
+        system_rev = tag->u.revision.rev;
+        return 0;
+}
+
+__tagtable(ATAG_REVISION, parse_tag_revision);
+
+static int __init parse_tag_cmdline(const struct tag *tag)
+{
+        strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
+        return 0;
+}
+
+__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
+
+/*
+ * Scan the tag table for this tag, and call its parse function.
+ * The tag table is built by the linker from all the __tagtable
+ * declarations.
+ */
+static int __init parse_tag(const struct tag *tag)
+{
+        extern struct tagtable __tagtable_begin, __tagtable_end;
+        struct tagtable *t;
+
+        for (t = &__tagtable_begin; t < &__tagtable_end; t++)
+                if (tag->hdr.tag == t->tag) {
+                        t->parse(tag);
+                        break;
+                }
+
+        return t < &__tagtable_end;
+}
+
+/*
+ * Parse all tags in the list, checking both the global and architecture
+ * specific tag tables.
+ */
+static void __init parse_tags(const struct tag *t)
+{
+        for (; t->hdr.size; t = tag_next(t))
+                if (!parse_tag(t))
+                        printk(KERN_WARNING
+                                "Ignoring unrecognised tag 0x%08x\n",
+                                t->hdr.tag);
+}
+
+/*
+ * This holds our defaults.
+ */
+static struct init_tags {
+        struct tag_header hdr1;
+        struct tag_core   core;
+        struct tag_header hdr2;
+        struct tag_mem32  mem;
+        struct tag_header hdr3;
+} init_tags __initdata = {
+        { tag_size(tag_core), ATAG_CORE },
+        { 1, PAGE_SIZE, 0xff },
+        { tag_size(tag_mem32), ATAG_MEM },
+        { MEM_SIZE, PHYS_OFFSET },
+        { 0, ATAG_NONE }
+};
+
+static void (*init_machine)(void) __initdata;
+
+static int __init customize_machine(void)
+{
+        /* customizes platform devices, or adds new ones */
+        if (init_machine)
+                init_machine();
+        return 0;
+}
+arch_initcall(customize_machine);
+
+void __init setup_arch(char **cmdline_p)
+{
+        struct tag *tags = (struct tag *)&init_tags;
+        struct machine_desc *mdesc;
+        char *from = default_command_line;
+
+        setup_processor();
+        mdesc = setup_machine(machine_arch_type);
+        machine_name = mdesc->name;
+
+        if (mdesc->soft_reboot)
+                reboot_setup("s");
+
+        if (mdesc->param_offset)
+                tags = phys_to_virt(mdesc->param_offset);
+
+        /*
+         * If we have the old style parameters, convert them to
+         * a tag list.
+         */
+        if (tags->hdr.tag != ATAG_CORE)
+                convert_to_tag_list(tags);
+        if (tags->hdr.tag != ATAG_CORE)
+                tags = (struct tag *)&init_tags;
+
+        if (mdesc->fixup)
+                mdesc->fixup(mdesc, tags, &from, &meminfo);
+
+        if (tags->hdr.tag == ATAG_CORE) {
+                if (meminfo.nr_banks != 0)
+                        squash_mem_tags(tags);
+                parse_tags(tags);
+        }
+
+        init_mm.start_code = (unsigned long) &_text;
+        init_mm.end_code   = (unsigned long) &_etext;
+        init_mm.end_data   = (unsigned long) &_edata;
+        init_mm.brk        = (unsigned long) &_end;
+
+        memcpy(saved_command_line, from, COMMAND_LINE_SIZE);
+        saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+        parse_cmdline(cmdline_p, from);
+        paging_init(&meminfo, mdesc);
+        request_standard_resources(&meminfo, mdesc);
+
+        /*
+         * Set up various architecture-specific pointers
+         */
+        init_arch_irq = mdesc->init_irq;
+        system_timer = mdesc->timer;
+        init_machine = mdesc->init_machine;
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_VGA_CONSOLE)
+        conswitchp = &vga_con;
+#elif defined(CONFIG_DUMMY_CONSOLE)
+        conswitchp = &dummy_con;
+#endif
+#endif
+}
+
+
+static int __init topology_init(void)
+{
+        int cpu;
+
+        for_each_cpu(cpu)
+                register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu, NULL);
+
+        return 0;
+}
+
+subsys_initcall(topology_init);
+
+static const char *hwcap_str[] = {
+        "swp",
+        "half",
+        "thumb",
+        "26bit",
+        "fastmult",
+        "fpa",
+        "vfp",
+        "edsp",
+        "java",
+        NULL
+};
+
+static void
+c_show_cache(struct seq_file *m, const char *type, unsigned int cache)
+{
+        unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
+
+        seq_printf(m, "%s size\t\t: %d\n"
+                      "%s assoc\t\t: %d\n"
+                      "%s line length\t: %d\n"
+                      "%s sets\t\t: %d\n",
+                type, mult << (8 + CACHE_SIZE(cache)),
+                type, (mult << CACHE_ASSOC(cache)) >> 1,
+                type, 8 << CACHE_LINE(cache),
+                type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
+                            CACHE_LINE(cache)));
+}
+
+static int c_show(struct seq_file *m, void *v)
+{
+        int i;
+
+        seq_printf(m, "Processor\t: %s rev %d (%s)\n",
+                   cpu_name, (int)processor_id & 15, elf_platform);
+
+#if defined(CONFIG_SMP)
+        for_each_online_cpu(i) {
+                seq_printf(m, "Processor\t: %d\n", i);
+                seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
+                           per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
+                           (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
+        }
+#else /* CONFIG_SMP */
+        seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+                   loops_per_jiffy / (500000/HZ),
+                   (loops_per_jiffy / (5000/HZ)) % 100);
+#endif
+
+        /* dump out the processor features */
+        seq_puts(m, "Features\t: ");
+
+        for (i = 0; hwcap_str[i]; i++)
+                if (elf_hwcap & (1 << i))
+                        seq_printf(m, "%s ", hwcap_str[i]);
+
+        seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24);
+        seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
+
+        if ((processor_id & 0x0000f000) == 0x00000000) {
+                /* pre-ARM7 */
+                seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4);
+        } else {
+                if ((processor_id & 0x0000f000) == 0x00007000) {
+                        /* ARM7 */
+                        seq_printf(m, "CPU variant\t: 0x%02x\n",
+                                   (processor_id >> 16) & 127);
+                } else {
+                        /* post-ARM7 */
+                        seq_printf(m, "CPU variant\t: 0x%x\n",
+                                   (processor_id >> 20) & 15);
+                }
+                seq_printf(m, "CPU part\t: 0x%03x\n",
+                           (processor_id >> 4) & 0xfff);
+        }
+        seq_printf(m, "CPU revision\t: %d\n", processor_id & 15);
+
+        {
+                unsigned int cache_info = read_cpuid(CPUID_CACHETYPE);
+                if (cache_info != processor_id) {
+                        seq_printf(m, "Cache type\t: %s\n"
+                                      "Cache clean\t: %s\n"
+                                      "Cache lockdown\t: %s\n"
+                                      "Cache format\t: %s\n",
+                                   cache_types[CACHE_TYPE(cache_info)],
+                                   cache_clean[CACHE_TYPE(cache_info)],
+                                   cache_lockdown[CACHE_TYPE(cache_info)],
+                                   CACHE_S(cache_info) ? "Harvard" : "Unified");
+
+                        if (CACHE_S(cache_info)) {
+                                c_show_cache(m, "I", CACHE_ISIZE(cache_info));
+                                c_show_cache(m, "D", CACHE_DSIZE(cache_info));
+                        } else {
+                                c_show_cache(m, "Cache", CACHE_ISIZE(cache_info));
+                        }
+                }
+        }
+
+        seq_puts(m, "\n");
+
+        seq_printf(m, "Hardware\t: %s\n", machine_name);
+        seq_printf(m, "Revision\t: %04x\n", system_rev);
+        seq_printf(m, "Serial\t\t: %08x%08x\n",
+                   system_serial_high, system_serial_low);
+
+        return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+        return *pos < 1 ? (void *)1 : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+        ++*pos;
+        return NULL;
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+struct seq_operations cpuinfo_op = {
+        .start  = c_start,
+        .next   = c_next,
+        .stop   = c_stop,
+        .show   = c_show
+};