2005-04-17 00:20:36 +02:00
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/*
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* linux/arch/arm/kernel/setup.c
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*
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* Copyright (C) 1995-2001 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/stddef.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/utsname.h>
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#include <linux/initrd.h>
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#include <linux/console.h>
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#include <linux/bootmem.h>
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#include <linux/seq_file.h>
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2006-07-10 13:44:13 +02:00
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#include <linux/screen_info.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/init.h>
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2010-05-10 10:20:22 +02:00
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#include <linux/kexec.h>
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2010-05-10 10:29:32 +02:00
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#include <linux/crash_dump.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/root_dev.h>
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#include <linux/cpu.h>
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#include <linux/interrupt.h>
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2006-02-16 12:08:09 +01:00
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#include <linux/smp.h>
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2007-07-30 00:36:13 +02:00
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#include <linux/fs.h>
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2010-01-10 18:23:29 +01:00
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#include <linux/proc_fs.h>
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2010-07-09 17:27:52 +02:00
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#include <linux/memblock.h>
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2005-04-17 00:20:36 +02:00
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2009-07-24 13:32:54 +02:00
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#include <asm/unified.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/cpu.h>
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2008-08-10 19:08:10 +02:00
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#include <asm/cputype.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/elf.h>
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#include <asm/procinfo.h>
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2008-12-01 12:53:07 +01:00
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#include <asm/sections.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/setup.h>
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2010-09-04 11:47:48 +02:00
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#include <asm/smp_plat.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/mach-types.h>
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#include <asm/cacheflush.h>
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2008-08-10 19:10:19 +02:00
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#include <asm/cachetype.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/tlbflush.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/irq.h>
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#include <asm/mach/time.h>
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2008-02-20 20:33:40 +01:00
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#include <asm/traps.h>
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2009-02-16 11:41:36 +01:00
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#include <asm/unwind.h>
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2005-04-17 00:20:36 +02:00
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2010-01-19 10:13:14 +01:00
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#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
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2006-03-16 00:17:30 +01:00
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#include "compat.h"
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2010-01-19 10:13:14 +01:00
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#endif
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2008-01-02 00:56:46 +01:00
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#include "atags.h"
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2009-09-15 18:30:37 +02:00
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#include "tcm.h"
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2006-03-16 00:17:30 +01:00
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2005-04-17 00:20:36 +02:00
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#ifndef MEM_SIZE
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#define MEM_SIZE (16*1024*1024)
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#endif
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#if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
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char fpe_type[8];
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static int __init fpe_setup(char *line)
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{
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memcpy(fpe_type, line, 8);
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return 1;
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}
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__setup("fpe=", fpe_setup);
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#endif
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2008-10-06 19:24:40 +02:00
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extern void paging_init(struct machine_desc *desc);
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2005-04-17 00:20:36 +02:00
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extern void reboot_setup(char *str);
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unsigned int processor_id;
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2007-12-18 03:53:27 +01:00
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EXPORT_SYMBOL(processor_id);
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2010-12-04 18:45:55 +01:00
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unsigned int __machine_arch_type __read_mostly;
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2005-04-17 00:20:36 +02:00
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EXPORT_SYMBOL(__machine_arch_type);
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2010-12-04 18:45:55 +01:00
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unsigned int cacheid __read_mostly;
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2008-09-25 16:35:28 +02:00
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EXPORT_SYMBOL(cacheid);
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2005-04-17 00:20:36 +02:00
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2007-05-31 23:02:22 +02:00
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unsigned int __atags_pointer __initdata;
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2005-04-17 00:20:36 +02:00
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unsigned int system_rev;
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EXPORT_SYMBOL(system_rev);
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unsigned int system_serial_low;
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EXPORT_SYMBOL(system_serial_low);
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unsigned int system_serial_high;
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EXPORT_SYMBOL(system_serial_high);
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2010-12-04 18:45:55 +01:00
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unsigned int elf_hwcap __read_mostly;
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2005-04-17 00:20:36 +02:00
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EXPORT_SYMBOL(elf_hwcap);
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#ifdef MULTI_CPU
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2010-12-04 18:45:55 +01:00
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struct processor processor __read_mostly;
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2005-04-17 00:20:36 +02:00
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#endif
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#ifdef MULTI_TLB
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2010-12-04 18:45:55 +01:00
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struct cpu_tlb_fns cpu_tlb __read_mostly;
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2005-04-17 00:20:36 +02:00
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#endif
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#ifdef MULTI_USER
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2010-12-04 18:45:55 +01:00
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struct cpu_user_fns cpu_user __read_mostly;
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2005-04-17 00:20:36 +02:00
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#endif
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#ifdef MULTI_CACHE
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2010-12-04 18:45:55 +01:00
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struct cpu_cache_fns cpu_cache __read_mostly;
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2005-04-17 00:20:36 +02:00
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#endif
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2007-02-05 14:48:08 +01:00
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#ifdef CONFIG_OUTER_CACHE
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2010-12-04 18:45:55 +01:00
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struct outer_cache_fns outer_cache __read_mostly;
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2010-02-16 07:57:43 +01:00
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EXPORT_SYMBOL(outer_cache);
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2007-02-05 14:48:08 +01:00
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#endif
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2005-04-17 00:20:36 +02:00
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2005-05-31 23:22:32 +02:00
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struct stack {
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u32 irq[3];
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u32 abt[3];
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u32 und[3];
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} ____cacheline_aligned;
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static struct stack stacks[NR_CPUS];
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2005-04-17 00:20:36 +02:00
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char elf_platform[ELF_PLATFORM_SIZE];
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EXPORT_SYMBOL(elf_platform);
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static const char *cpu_name;
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static const char *machine_name;
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2010-01-27 01:13:31 +01:00
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static char __initdata cmd_line[COMMAND_LINE_SIZE];
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2010-12-20 11:18:36 +01:00
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struct machine_desc *machine_desc __initdata;
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2005-04-17 00:20:36 +02:00
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static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
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static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
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#define ENDIANNESS ((char)endian_test.l)
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DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
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/*
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* Standard memory resources
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*/
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static struct resource mem_res[] = {
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2006-06-12 23:47:06 +02:00
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{
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.name = "Video RAM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_MEM
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},
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{
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.name = "Kernel text",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_MEM
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},
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{
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.name = "Kernel data",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_MEM
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}
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2005-04-17 00:20:36 +02:00
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};
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#define video_ram mem_res[0]
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#define kernel_code mem_res[1]
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#define kernel_data mem_res[2]
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static struct resource io_res[] = {
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2006-06-12 23:47:06 +02:00
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{
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.name = "reserved",
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.start = 0x3bc,
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.end = 0x3be,
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.flags = IORESOURCE_IO | IORESOURCE_BUSY
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},
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{
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.name = "reserved",
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.start = 0x378,
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.end = 0x37f,
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.flags = IORESOURCE_IO | IORESOURCE_BUSY
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},
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{
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.name = "reserved",
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.start = 0x278,
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.end = 0x27f,
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.flags = IORESOURCE_IO | IORESOURCE_BUSY
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}
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2005-04-17 00:20:36 +02:00
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};
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#define lp0 io_res[0]
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#define lp1 io_res[1]
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#define lp2 io_res[2]
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static const char *proc_arch[] = {
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"undefined/unknown",
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"3",
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"4",
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"4T",
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"5",
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"5T",
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"5TE",
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"5TEJ",
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"6TEJ",
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2006-01-12 17:28:16 +01:00
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"7",
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2005-04-17 00:20:36 +02:00
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"?(11)",
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"?(12)",
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"?(13)",
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"?(14)",
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"?(15)",
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"?(16)",
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"?(17)",
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};
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int cpu_architecture(void)
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{
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int cpu_arch;
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2008-08-10 19:08:10 +02:00
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if ((read_cpuid_id() & 0x0008f000) == 0) {
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2005-04-17 00:20:36 +02:00
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cpu_arch = CPU_ARCH_UNKNOWN;
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2008-08-10 19:08:10 +02:00
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} else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
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cpu_arch = (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
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} else if ((read_cpuid_id() & 0x00080000) == 0x00000000) {
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cpu_arch = (read_cpuid_id() >> 16) & 7;
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2005-04-17 00:20:36 +02:00
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if (cpu_arch)
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cpu_arch += CPU_ARCH_ARMv3;
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2008-08-10 19:08:10 +02:00
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} else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
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2007-09-25 17:49:45 +02:00
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unsigned int mmfr0;
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/* Revised CPUID format. Read the Memory Model Feature
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* Register 0 and check for VMSAv7 or PMSAv7 */
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asm("mrc p15, 0, %0, c0, c1, 4"
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: "=r" (mmfr0));
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if ((mmfr0 & 0x0000000f) == 0x00000003 ||
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(mmfr0 & 0x000000f0) == 0x00000030)
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cpu_arch = CPU_ARCH_ARMv7;
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else if ((mmfr0 & 0x0000000f) == 0x00000002 ||
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(mmfr0 & 0x000000f0) == 0x00000020)
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cpu_arch = CPU_ARCH_ARMv6;
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else
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cpu_arch = CPU_ARCH_UNKNOWN;
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} else
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cpu_arch = CPU_ARCH_UNKNOWN;
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2005-04-17 00:20:36 +02:00
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return cpu_arch;
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}
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2010-09-13 17:18:30 +02:00
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static int cpu_has_aliasing_icache(unsigned int arch)
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{
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int aliasing_icache;
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unsigned int id_reg, num_sets, line_size;
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/* arch specifies the register format */
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switch (arch) {
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case CPU_ARCH_ARMv7:
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2010-10-06 12:07:28 +02:00
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asm("mcr p15, 2, %0, c0, c0, 0 @ set CSSELR"
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: /* No output operands */
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2010-09-13 17:18:30 +02:00
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: "r" (1));
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2010-10-06 12:07:28 +02:00
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isb();
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asm("mrc p15, 1, %0, c0, c0, 0 @ read CCSIDR"
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: "=r" (id_reg));
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2010-09-13 17:18:30 +02:00
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line_size = 4 << ((id_reg & 0x7) + 2);
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num_sets = ((id_reg >> 13) & 0x7fff) + 1;
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aliasing_icache = (line_size * num_sets) > PAGE_SIZE;
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break;
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case CPU_ARCH_ARMv6:
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aliasing_icache = read_cpuid_cachetype() & (1 << 11);
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break;
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default:
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/* I-cache aliases will be handled by D-cache aliasing code */
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aliasing_icache = 0;
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}
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return aliasing_icache;
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}
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2008-09-25 16:35:28 +02:00
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static void __init cacheid_init(void)
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{
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unsigned int cachetype = read_cpuid_cachetype();
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unsigned int arch = cpu_architecture();
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2009-03-03 11:44:12 +01:00
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if (arch >= CPU_ARCH_ARMv6) {
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if ((cachetype & (7 << 29)) == 4 << 29) {
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/* ARMv7 register format */
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cacheid = CACHEID_VIPT_NONALIASING;
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if ((cachetype & (3 << 14)) == 1 << 14)
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cacheid |= CACHEID_ASID_TAGGED;
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2010-09-13 17:18:30 +02:00
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else if (cpu_has_aliasing_icache(CPU_ARCH_ARMv7))
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cacheid |= CACHEID_VIPT_I_ALIASING;
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} else if (cachetype & (1 << 23)) {
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2008-09-25 16:35:28 +02:00
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cacheid = CACHEID_VIPT_ALIASING;
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2010-09-13 17:18:30 +02:00
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} else {
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2008-09-25 16:35:28 +02:00
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cacheid = CACHEID_VIPT_NONALIASING;
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2010-09-13 17:18:30 +02:00
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if (cpu_has_aliasing_icache(CPU_ARCH_ARMv6))
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cacheid |= CACHEID_VIPT_I_ALIASING;
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}
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2008-09-25 16:35:28 +02:00
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} else {
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cacheid = CACHEID_VIVT;
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}
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2008-09-25 16:39:20 +02:00
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printk("CPU: %s data cache, %s instruction cache\n",
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cache_is_vivt() ? "VIVT" :
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cache_is_vipt_aliasing() ? "VIPT aliasing" :
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cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown",
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cache_is_vivt() ? "VIVT" :
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icache_is_vivt_asid_tagged() ? "VIVT ASID tagged" :
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2010-09-13 17:18:30 +02:00
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icache_is_vipt_aliasing() ? "VIPT aliasing" :
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2008-09-25 16:39:20 +02:00
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cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown");
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2008-09-25 16:35:28 +02:00
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}
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2005-04-17 00:20:36 +02:00
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/*
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|
|
* These functions re-use the assembly code in head.S, which
|
|
|
|
* already provide the required functionality.
|
|
|
|
*/
|
2006-02-24 22:04:56 +01:00
|
|
|
extern struct proc_info_list *lookup_processor_type(unsigned int);
|
2005-04-17 00:20:36 +02:00
|
|
|
extern struct machine_desc *lookup_machine_type(unsigned int);
|
|
|
|
|
2010-07-05 15:53:10 +02:00
|
|
|
static void __init feat_v6_fixup(void)
|
|
|
|
{
|
|
|
|
int id = read_cpuid_id();
|
|
|
|
|
|
|
|
if ((id & 0xff0f0000) != 0x41070000)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* HWCAP_TLS is available only on 1136 r1p0 and later,
|
|
|
|
* see also kuser_get_tls_init.
|
|
|
|
*/
|
|
|
|
if ((((id >> 4) & 0xfff) == 0xb36) && (((id >> 20) & 3) == 0))
|
|
|
|
elf_hwcap &= ~HWCAP_TLS;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
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
|
|
|
|
*/
|
2008-08-10 19:08:10 +02:00
|
|
|
list = lookup_processor_type(read_cpuid_id());
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!list) {
|
|
|
|
printk("CPU configuration botched (ID %08x), unable "
|
2008-08-10 19:08:10 +02:00
|
|
|
"to continue.\n", read_cpuid_id());
|
2005-04-17 00:20:36 +02:00
|
|
|
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
|
|
|
|
|
2006-07-03 14:29:38 +02:00
|
|
|
printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
|
2008-08-10 19:08:10 +02:00
|
|
|
cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
|
2006-06-29 16:03:09 +02:00
|
|
|
proc_arch[cpu_architecture()], cr_alignment);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-10-02 11:18:13 +02:00
|
|
|
sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
|
2005-04-17 00:20:36 +02:00
|
|
|
sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
|
|
|
|
elf_hwcap = list->elf_hwcap;
|
2006-04-10 22:32:35 +02:00
|
|
|
#ifndef CONFIG_ARM_THUMB
|
|
|
|
elf_hwcap &= ~HWCAP_THUMB;
|
|
|
|
#endif
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-07-05 15:53:10 +02:00
|
|
|
feat_v6_fixup();
|
|
|
|
|
2008-09-25 16:35:28 +02:00
|
|
|
cacheid_init();
|
2005-04-17 00:20:36 +02:00
|
|
|
cpu_proc_init();
|
|
|
|
}
|
|
|
|
|
2005-05-31 23:22:32 +02:00
|
|
|
/*
|
|
|
|
* cpu_init - initialise one CPU.
|
|
|
|
*
|
2008-09-25 15:45:02 +02:00
|
|
|
* cpu_init sets up the per-CPU stacks.
|
2005-05-31 23:22:32 +02:00
|
|
|
*/
|
2005-06-19 19:39:33 +02:00
|
|
|
void cpu_init(void)
|
2005-05-31 23:22:32 +02:00
|
|
|
{
|
|
|
|
unsigned int cpu = smp_processor_id();
|
|
|
|
struct stack *stk = &stacks[cpu];
|
|
|
|
|
|
|
|
if (cpu >= NR_CPUS) {
|
|
|
|
printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
|
2009-07-24 13:32:54 +02:00
|
|
|
/*
|
|
|
|
* Define the placement constraint for the inline asm directive below.
|
|
|
|
* In Thumb-2, msr with an immediate value is not allowed.
|
|
|
|
*/
|
|
|
|
#ifdef CONFIG_THUMB2_KERNEL
|
|
|
|
#define PLC "r"
|
|
|
|
#else
|
|
|
|
#define PLC "I"
|
|
|
|
#endif
|
|
|
|
|
2005-05-31 23:22:32 +02:00
|
|
|
/*
|
|
|
|
* setup stacks for re-entrant exception handlers
|
|
|
|
*/
|
|
|
|
__asm__ (
|
|
|
|
"msr cpsr_c, %1\n\t"
|
2009-07-24 13:32:54 +02:00
|
|
|
"add r14, %0, %2\n\t"
|
|
|
|
"mov sp, r14\n\t"
|
2005-05-31 23:22:32 +02:00
|
|
|
"msr cpsr_c, %3\n\t"
|
2009-07-24 13:32:54 +02:00
|
|
|
"add r14, %0, %4\n\t"
|
|
|
|
"mov sp, r14\n\t"
|
2005-05-31 23:22:32 +02:00
|
|
|
"msr cpsr_c, %5\n\t"
|
2009-07-24 13:32:54 +02:00
|
|
|
"add r14, %0, %6\n\t"
|
|
|
|
"mov sp, r14\n\t"
|
2005-05-31 23:22:32 +02:00
|
|
|
"msr cpsr_c, %7"
|
|
|
|
:
|
|
|
|
: "r" (stk),
|
2009-07-24 13:32:54 +02:00
|
|
|
PLC (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
|
2005-05-31 23:22:32 +02:00
|
|
|
"I" (offsetof(struct stack, irq[0])),
|
2009-07-24 13:32:54 +02:00
|
|
|
PLC (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
|
2005-05-31 23:22:32 +02:00
|
|
|
"I" (offsetof(struct stack, abt[0])),
|
2009-07-24 13:32:54 +02:00
|
|
|
PLC (PSR_F_BIT | PSR_I_BIT | UND_MODE),
|
2005-05-31 23:22:32 +02:00
|
|
|
"I" (offsetof(struct stack, und[0])),
|
2009-07-24 13:32:54 +02:00
|
|
|
PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
|
2005-06-29 16:34:39 +02:00
|
|
|
: "r14");
|
2005-05-31 23:22:32 +02:00
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2008-10-06 19:24:40 +02:00
|
|
|
static int __init arm_add_memory(unsigned long start, unsigned long size)
|
2005-06-22 22:43:10 +02:00
|
|
|
{
|
2008-10-06 19:24:40 +02:00
|
|
|
struct membank *bank = &meminfo.bank[meminfo.nr_banks];
|
|
|
|
|
|
|
|
if (meminfo.nr_banks >= NR_BANKS) {
|
|
|
|
printk(KERN_CRIT "NR_BANKS too low, "
|
|
|
|
"ignoring memory at %#lx\n", start);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2006-11-30 21:44:49 +01:00
|
|
|
|
2005-06-22 22:43:10 +02:00
|
|
|
/*
|
|
|
|
* Ensure that start/size are aligned to a page boundary.
|
|
|
|
* Size is appropriately rounded down, start is rounded up.
|
|
|
|
*/
|
|
|
|
size -= start & ~PAGE_MASK;
|
2006-11-30 21:44:49 +01:00
|
|
|
bank->start = PAGE_ALIGN(start);
|
|
|
|
bank->size = size & PAGE_MASK;
|
2008-10-06 19:24:40 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Check whether this memory region has non-zero size or
|
|
|
|
* invalid node number.
|
|
|
|
*/
|
2010-05-07 18:40:33 +02:00
|
|
|
if (bank->size == 0)
|
2008-10-06 19:24:40 +02:00
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
meminfo.nr_banks++;
|
|
|
|
return 0;
|
2005-06-22 22:43:10 +02:00
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* Pick out the memory size. We look for mem=size@start,
|
|
|
|
* where start and size are "size[KkMm]"
|
|
|
|
*/
|
2010-01-11 23:17:34 +01:00
|
|
|
static int __init early_mem(char *p)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
static int usermem __initdata = 0;
|
|
|
|
unsigned long size, start;
|
2010-01-11 23:17:34 +01:00
|
|
|
char *endp;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* 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;
|
2010-01-11 23:17:34 +01:00
|
|
|
size = memparse(p, &endp);
|
|
|
|
if (*endp == '@')
|
|
|
|
start = memparse(endp + 1, NULL);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-04-20 22:41:18 +02:00
|
|
|
arm_add_memory(start, size);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-01-11 23:17:34 +01:00
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2010-01-11 23:17:34 +01:00
|
|
|
early_param("mem", early_mem);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
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
|
|
|
|
}
|
|
|
|
|
2011-01-14 23:05:14 +01:00
|
|
|
static void __init request_standard_resources(struct machine_desc *mdesc)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2011-01-14 23:05:14 +01:00
|
|
|
struct memblock_region *region;
|
2005-04-17 00:20:36 +02:00
|
|
|
struct resource *res;
|
|
|
|
|
2008-12-01 12:53:07 +01:00
|
|
|
kernel_code.start = virt_to_phys(_text);
|
|
|
|
kernel_code.end = virt_to_phys(_etext - 1);
|
2010-10-01 15:12:22 +02:00
|
|
|
kernel_data.start = virt_to_phys(_sdata);
|
2008-12-01 12:53:07 +01:00
|
|
|
kernel_data.end = virt_to_phys(_end - 1);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2011-01-14 23:05:14 +01:00
|
|
|
for_each_memblock(memory, region) {
|
2005-04-17 00:20:36 +02:00
|
|
|
res = alloc_bootmem_low(sizeof(*res));
|
|
|
|
res->name = "System RAM";
|
2011-01-14 23:05:14 +01:00
|
|
|
res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
|
|
|
|
res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
|
2005-04-17 00:20:36 +02:00
|
|
|
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)
|
|
|
|
{
|
2008-10-06 19:24:40 +02:00
|
|
|
return arm_add_memory(tag->u.mem.start, tag->u.mem.size);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
__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_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)
|
|
|
|
{
|
2011-01-12 14:08:37 +01:00
|
|
|
#ifndef CONFIG_CMDLINE_FORCE
|
2005-04-17 00:20:36 +02:00
|
|
|
strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
|
2011-01-12 14:08:37 +01:00
|
|
|
#else
|
|
|
|
pr_warning("Ignoring tag cmdline (using the default kernel command line)\n");
|
|
|
|
#endif /* CONFIG_CMDLINE_FORCE */
|
2005-04-17 00:20:36 +02:00
|
|
|
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 int __init customize_machine(void)
|
|
|
|
{
|
|
|
|
/* customizes platform devices, or adds new ones */
|
2010-12-20 11:18:36 +01:00
|
|
|
if (machine_desc->init_machine)
|
|
|
|
machine_desc->init_machine();
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
arch_initcall(customize_machine);
|
|
|
|
|
2010-05-10 10:20:22 +02:00
|
|
|
#ifdef CONFIG_KEXEC
|
|
|
|
static inline unsigned long long get_total_mem(void)
|
|
|
|
{
|
|
|
|
unsigned long total;
|
|
|
|
|
|
|
|
total = max_low_pfn - min_low_pfn;
|
|
|
|
return total << PAGE_SHIFT;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* reserve_crashkernel() - reserves memory are for crash kernel
|
|
|
|
*
|
|
|
|
* This function reserves memory area given in "crashkernel=" kernel command
|
|
|
|
* line parameter. The memory reserved is used by a dump capture kernel when
|
|
|
|
* primary kernel is crashing.
|
|
|
|
*/
|
|
|
|
static void __init reserve_crashkernel(void)
|
|
|
|
{
|
|
|
|
unsigned long long crash_size, crash_base;
|
|
|
|
unsigned long long total_mem;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
total_mem = get_total_mem();
|
|
|
|
ret = parse_crashkernel(boot_command_line, total_mem,
|
|
|
|
&crash_size, &crash_base);
|
|
|
|
if (ret)
|
|
|
|
return;
|
|
|
|
|
|
|
|
ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
|
|
|
|
if (ret < 0) {
|
|
|
|
printk(KERN_WARNING "crashkernel reservation failed - "
|
|
|
|
"memory is in use (0x%lx)\n", (unsigned long)crash_base);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
|
|
|
|
"for crashkernel (System RAM: %ldMB)\n",
|
|
|
|
(unsigned long)(crash_size >> 20),
|
|
|
|
(unsigned long)(crash_base >> 20),
|
|
|
|
(unsigned long)(total_mem >> 20));
|
|
|
|
|
|
|
|
crashk_res.start = crash_base;
|
|
|
|
crashk_res.end = crash_base + crash_size - 1;
|
|
|
|
insert_resource(&iomem_resource, &crashk_res);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void reserve_crashkernel(void) {}
|
|
|
|
#endif /* CONFIG_KEXEC */
|
|
|
|
|
2010-05-10 10:29:32 +02:00
|
|
|
/*
|
|
|
|
* Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
|
|
|
|
* is_kdump_kernel() to determine if we are booting after a panic. Hence
|
|
|
|
* ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
|
|
/*
|
|
|
|
* elfcorehdr= specifies the location of elf core header stored by the crashed
|
|
|
|
* kernel. This option will be passed by kexec loader to the capture kernel.
|
|
|
|
*/
|
|
|
|
static int __init setup_elfcorehdr(char *arg)
|
|
|
|
{
|
|
|
|
char *end;
|
|
|
|
|
|
|
|
if (!arg)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
elfcorehdr_addr = memparse(arg, &end);
|
|
|
|
return end > arg ? 0 : -EINVAL;
|
|
|
|
}
|
|
|
|
early_param("elfcorehdr", setup_elfcorehdr);
|
|
|
|
#endif /* CONFIG_CRASH_DUMP */
|
|
|
|
|
2010-01-19 10:13:14 +01:00
|
|
|
static void __init squash_mem_tags(struct tag *tag)
|
|
|
|
{
|
|
|
|
for (; tag->hdr.size; tag = tag_next(tag))
|
|
|
|
if (tag->hdr.tag == ATAG_MEM)
|
|
|
|
tag->hdr.tag = ATAG_NONE;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
|
|
{
|
|
|
|
struct tag *tags = (struct tag *)&init_tags;
|
|
|
|
struct machine_desc *mdesc;
|
|
|
|
char *from = default_command_line;
|
|
|
|
|
2009-02-16 11:41:36 +01:00
|
|
|
unwind_init();
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
setup_processor();
|
|
|
|
mdesc = setup_machine(machine_arch_type);
|
2010-12-20 11:18:36 +01:00
|
|
|
machine_desc = mdesc;
|
2005-04-17 00:20:36 +02:00
|
|
|
machine_name = mdesc->name;
|
|
|
|
|
|
|
|
if (mdesc->soft_reboot)
|
|
|
|
reboot_setup("s");
|
|
|
|
|
2007-05-31 23:02:22 +02:00
|
|
|
if (__atags_pointer)
|
|
|
|
tags = phys_to_virt(__atags_pointer);
|
|
|
|
else if (mdesc->boot_params)
|
2005-07-04 11:43:36 +02:00
|
|
|
tags = phys_to_virt(mdesc->boot_params);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-01-19 10:13:14 +01:00
|
|
|
#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* If we have the old style parameters, convert them to
|
|
|
|
* a tag list.
|
|
|
|
*/
|
|
|
|
if (tags->hdr.tag != ATAG_CORE)
|
|
|
|
convert_to_tag_list(tags);
|
2010-01-19 10:13:14 +01:00
|
|
|
#endif
|
2005-04-17 00:20:36 +02:00
|
|
|
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);
|
2008-01-02 00:56:46 +01:00
|
|
|
save_atags(tags);
|
2005-04-17 00:20:36 +02:00
|
|
|
parse_tags(tags);
|
|
|
|
}
|
|
|
|
|
2008-12-01 12:53:07 +01:00
|
|
|
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;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-01-11 23:17:34 +01:00
|
|
|
/* parse_early_param needs a boot_command_line */
|
|
|
|
strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
|
|
|
|
|
2010-01-27 01:13:31 +01:00
|
|
|
/* populate cmd_line too for later use, preserving boot_command_line */
|
|
|
|
strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
|
|
|
|
*cmdline_p = cmd_line;
|
2010-01-11 23:17:34 +01:00
|
|
|
|
|
|
|
parse_early_param();
|
|
|
|
|
2010-05-22 20:47:18 +02:00
|
|
|
arm_memblock_init(&meminfo, mdesc);
|
2010-07-09 17:27:52 +02:00
|
|
|
|
2008-10-06 19:24:40 +02:00
|
|
|
paging_init(mdesc);
|
2011-01-14 23:05:14 +01:00
|
|
|
request_standard_resources(mdesc);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-02-16 12:08:09 +01:00
|
|
|
#ifdef CONFIG_SMP
|
2010-09-04 11:47:48 +02:00
|
|
|
if (is_smp())
|
|
|
|
smp_init_cpus();
|
2006-02-16 12:08:09 +01:00
|
|
|
#endif
|
2010-05-10 10:20:22 +02:00
|
|
|
reserve_crashkernel();
|
2006-02-16 12:08:09 +01:00
|
|
|
|
2005-05-31 23:22:32 +02:00
|
|
|
cpu_init();
|
2009-09-15 18:30:37 +02:00
|
|
|
tcm_init();
|
2005-05-31 23:22:32 +02:00
|
|
|
|
2010-12-13 09:42:34 +01:00
|
|
|
#ifdef CONFIG_MULTI_IRQ_HANDLER
|
|
|
|
handle_arch_irq = mdesc->handle_irq;
|
|
|
|
#endif
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
#ifdef CONFIG_VT
|
|
|
|
#if defined(CONFIG_VGA_CONSOLE)
|
|
|
|
conswitchp = &vga_con;
|
|
|
|
#elif defined(CONFIG_DUMMY_CONSOLE)
|
|
|
|
conswitchp = &dummy_con;
|
|
|
|
#endif
|
|
|
|
#endif
|
2008-02-20 20:33:40 +01:00
|
|
|
early_trap_init();
|
2010-12-16 14:49:34 +01:00
|
|
|
|
|
|
|
if (mdesc->init_early)
|
|
|
|
mdesc->init_early();
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int __init topology_init(void)
|
|
|
|
{
|
|
|
|
int cpu;
|
|
|
|
|
2007-03-13 10:54:21 +01:00
|
|
|
for_each_possible_cpu(cpu) {
|
|
|
|
struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu);
|
|
|
|
cpuinfo->cpu.hotpluggable = 1;
|
|
|
|
register_cpu(&cpuinfo->cpu, cpu);
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
subsys_initcall(topology_init);
|
|
|
|
|
2010-01-10 18:23:29 +01:00
|
|
|
#ifdef CONFIG_HAVE_PROC_CPU
|
|
|
|
static int __init proc_cpu_init(void)
|
|
|
|
{
|
|
|
|
struct proc_dir_entry *res;
|
|
|
|
|
|
|
|
res = proc_mkdir("cpu", NULL);
|
|
|
|
if (!res)
|
|
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
fs_initcall(proc_cpu_init);
|
|
|
|
#endif
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static const char *hwcap_str[] = {
|
|
|
|
"swp",
|
|
|
|
"half",
|
|
|
|
"thumb",
|
|
|
|
"26bit",
|
|
|
|
"fastmult",
|
|
|
|
"fpa",
|
|
|
|
"vfp",
|
|
|
|
"edsp",
|
|
|
|
"java",
|
2006-10-27 06:13:19 +02:00
|
|
|
"iwmmxt",
|
2006-12-18 00:59:10 +01:00
|
|
|
"crunch",
|
2008-11-06 14:23:06 +01:00
|
|
|
"thumbee",
|
2008-11-06 14:23:07 +01:00
|
|
|
"neon",
|
2009-02-11 13:13:56 +01:00
|
|
|
"vfpv3",
|
|
|
|
"vfpv3d16",
|
2005-04-17 00:20:36 +02:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
static int c_show(struct seq_file *m, void *v)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
seq_printf(m, "Processor\t: %s rev %d (%s)\n",
|
2008-08-10 19:08:10 +02:00
|
|
|
cpu_name, read_cpuid_id() & 15, elf_platform);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
#if defined(CONFIG_SMP)
|
|
|
|
for_each_online_cpu(i) {
|
2005-11-06 22:41:08 +01:00
|
|
|
/*
|
|
|
|
* glibc reads /proc/cpuinfo to determine the number of
|
|
|
|
* online processors, looking for lines beginning with
|
|
|
|
* "processor". Give glibc what it expects.
|
|
|
|
*/
|
|
|
|
seq_printf(m, "processor\t: %d\n", i);
|
2005-04-17 00:20:36 +02:00
|
|
|
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]);
|
|
|
|
|
2008-08-10 19:08:10 +02:00
|
|
|
seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
|
2005-04-17 00:20:36 +02:00
|
|
|
seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
|
|
|
|
|
2008-08-10 19:08:10 +02:00
|
|
|
if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
|
2005-04-17 00:20:36 +02:00
|
|
|
/* pre-ARM7 */
|
2008-08-10 19:08:10 +02:00
|
|
|
seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
2008-08-10 19:08:10 +02:00
|
|
|
if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
|
2005-04-17 00:20:36 +02:00
|
|
|
/* ARM7 */
|
|
|
|
seq_printf(m, "CPU variant\t: 0x%02x\n",
|
2008-08-10 19:08:10 +02:00
|
|
|
(read_cpuid_id() >> 16) & 127);
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
|
|
|
/* post-ARM7 */
|
|
|
|
seq_printf(m, "CPU variant\t: 0x%x\n",
|
2008-08-10 19:08:10 +02:00
|
|
|
(read_cpuid_id() >> 20) & 15);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
seq_printf(m, "CPU part\t: 0x%03x\n",
|
2008-08-10 19:08:10 +02:00
|
|
|
(read_cpuid_id() >> 4) & 0xfff);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2008-08-10 19:08:10 +02:00
|
|
|
seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2008-01-22 20:41:07 +01:00
|
|
|
const struct seq_operations cpuinfo_op = {
|
2005-04-17 00:20:36 +02:00
|
|
|
.start = c_start,
|
|
|
|
.next = c_next,
|
|
|
|
.stop = c_stop,
|
|
|
|
.show = c_show
|
|
|
|
};
|