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* linux/arch/arm/kernel/setup.c
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* Copyright (C) 1995-2001 Russell King
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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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#include <linux/export.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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#include <linux/screen_info.h>
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#include <linux/init.h>
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#include <linux/kexec.h>
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#include <linux/of_fdt.h>
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#include <linux/crash_dump.h>
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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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#include <linux/smp.h>
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#include <linux/proc_fs.h>
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#include <linux/memblock.h>
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#include <linux/bug.h>
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#include <linux/compiler.h>
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#include <asm/unified.h>
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#include <asm/cputype.h>
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#include <asm/procinfo.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/smp_plat.h>
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#include <asm/mach-types.h>
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#include <asm/cacheflush.h>
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#include <asm/cachetype.h>
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#include <asm/tlbflush.h>
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#include <asm/system.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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#include <asm/traps.h>
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#include <asm/unwind.h>
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#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
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#define MEM_SIZE (16*1024*1024)
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#if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
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static int __init fpe_setup(char *line)
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memcpy(fpe_type, line, 8);
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__setup("fpe=", fpe_setup);
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extern void paging_init(struct machine_desc *desc);
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extern void sanity_check_meminfo(void);
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extern void reboot_setup(char *str);
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unsigned int processor_id;
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EXPORT_SYMBOL(processor_id);
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unsigned int __machine_arch_type __read_mostly;
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EXPORT_SYMBOL(__machine_arch_type);
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unsigned int cacheid __read_mostly;
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EXPORT_SYMBOL(cacheid);
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unsigned int __atags_pointer __initdata;
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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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unsigned int elf_hwcap __read_mostly;
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EXPORT_SYMBOL(elf_hwcap);
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struct processor processor __read_mostly;
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struct cpu_tlb_fns cpu_tlb __read_mostly;
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struct cpu_user_fns cpu_user __read_mostly;
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struct cpu_cache_fns cpu_cache __read_mostly;
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#ifdef CONFIG_OUTER_CACHE
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struct outer_cache_fns outer_cache __read_mostly;
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EXPORT_SYMBOL(outer_cache);
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* Cached cpu_architecture() result for use by assembler code.
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* C code should use the cpu_architecture() function instead of accessing this
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int __cpu_architecture __read_mostly = CPU_ARCH_UNKNOWN;
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} ____cacheline_aligned;
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static struct stack stacks[NR_CPUS];
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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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static char __initdata cmd_line[COMMAND_LINE_SIZE];
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struct machine_desc *machine_desc __initdata;
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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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* Standard memory resources
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static struct resource mem_res[] = {
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.flags = IORESOURCE_MEM
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.name = "Kernel text",
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.flags = IORESOURCE_MEM
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.name = "Kernel data",
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.flags = IORESOURCE_MEM
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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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.flags = IORESOURCE_IO | IORESOURCE_BUSY
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.flags = IORESOURCE_IO | IORESOURCE_BUSY
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.flags = IORESOURCE_IO | IORESOURCE_BUSY
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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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static int __get_cpu_architecture(void)
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if ((read_cpuid_id() & 0x0008f000) == 0) {
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cpu_arch = CPU_ARCH_UNKNOWN;
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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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cpu_arch += CPU_ARCH_ARMv3;
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} else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
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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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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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cpu_arch = CPU_ARCH_UNKNOWN;
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cpu_arch = CPU_ARCH_UNKNOWN;
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int __pure cpu_architecture(void)
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BUG_ON(__cpu_architecture == CPU_ARCH_UNKNOWN);
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return __cpu_architecture;
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static int cpu_has_aliasing_icache(unsigned int arch)
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unsigned int id_reg, num_sets, line_size;
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/* PIPT caches never alias. */
269
if (icache_is_pipt())
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/* arch specifies the register format */
275
asm("mcr p15, 2, %0, c0, c0, 0 @ set CSSELR"
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: /* No output operands */
279
asm("mrc p15, 1, %0, c0, c0, 0 @ read CCSIDR"
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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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aliasing_icache = read_cpuid_cachetype() & (1 << 11);
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/* I-cache aliases will be handled by D-cache aliasing code */
293
return aliasing_icache;
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static void __init cacheid_init(void)
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unsigned int cachetype = read_cpuid_cachetype();
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unsigned int arch = cpu_architecture();
301
if (arch >= CPU_ARCH_ARMv6) {
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if ((cachetype & (7 << 29)) == 4 << 29) {
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/* ARMv7 register format */
304
arch = CPU_ARCH_ARMv7;
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cacheid = CACHEID_VIPT_NONALIASING;
306
switch (cachetype & (3 << 14)) {
308
cacheid |= CACHEID_ASID_TAGGED;
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cacheid |= CACHEID_PIPT;
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arch = CPU_ARCH_ARMv6;
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if (cachetype & (1 << 23))
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cacheid = CACHEID_VIPT_ALIASING;
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cacheid = CACHEID_VIPT_NONALIASING;
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if (cpu_has_aliasing_icache(arch))
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cacheid |= CACHEID_VIPT_I_ALIASING;
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cacheid = CACHEID_VIVT;
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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() ? "PIPT / 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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icache_is_vipt_aliasing() ? "VIPT aliasing" :
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icache_is_pipt() ? "PIPT" :
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cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown");
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* These functions re-use the assembly code in head.S, which
340
* already provide the required functionality.
342
extern struct proc_info_list *lookup_processor_type(unsigned int);
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void __init early_print(const char *str, ...)
346
extern void printascii(const char *);
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vsnprintf(buf, sizeof(buf), str, ap);
354
#ifdef CONFIG_DEBUG_LL
360
static void __init feat_v6_fixup(void)
362
int id = read_cpuid_id();
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if ((id & 0xff0f0000) != 0x41070000)
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* HWCAP_TLS is available only on 1136 r1p0 and later,
369
* see also kuser_get_tls_init.
371
if ((((id >> 4) & 0xfff) == 0xb36) && (((id >> 20) & 3) == 0))
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elf_hwcap &= ~HWCAP_TLS;
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* cpu_init - initialise one CPU.
378
* cpu_init sets up the per-CPU stacks.
382
unsigned int cpu = smp_processor_id();
383
struct stack *stk = &stacks[cpu];
385
if (cpu >= NR_CPUS) {
386
printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
393
* Define the placement constraint for the inline asm directive below.
394
* In Thumb-2, msr with an immediate value is not allowed.
396
#ifdef CONFIG_THUMB2_KERNEL
403
* setup stacks for re-entrant exception handlers
407
"add r14, %0, %2\n\t"
410
"add r14, %0, %4\n\t"
413
"add r14, %0, %6\n\t"
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PLC (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
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"I" (offsetof(struct stack, irq[0])),
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PLC (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
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"I" (offsetof(struct stack, abt[0])),
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PLC (PSR_F_BIT | PSR_I_BIT | UND_MODE),
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"I" (offsetof(struct stack, und[0])),
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PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
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static void __init setup_processor(void)
430
struct proc_info_list *list;
433
* locate processor in the list of supported processor
434
* types. The linker builds this table for us from the
435
* entries in arch/arm/mm/proc-*.S
437
list = lookup_processor_type(read_cpuid_id());
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printk("CPU configuration botched (ID %08x), unable "
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"to continue.\n", read_cpuid_id());
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cpu_name = list->cpu_name;
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__cpu_architecture = __get_cpu_architecture();
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processor = *list->proc;
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cpu_tlb = *list->tlb;
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cpu_user = *list->user;
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cpu_cache = *list->cache;
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printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
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cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
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proc_arch[cpu_architecture()], cr_alignment);
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snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c",
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list->arch_name, ENDIANNESS);
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snprintf(elf_platform, ELF_PLATFORM_SIZE, "%s%c",
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list->elf_name, ENDIANNESS);
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elf_hwcap = list->elf_hwcap;
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#ifndef CONFIG_ARM_THUMB
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elf_hwcap &= ~HWCAP_THUMB;
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void __init dump_machine_table(void)
481
struct machine_desc *p;
483
early_print("Available machine support:\n\nID (hex)\tNAME\n");
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for_each_machine_desc(p)
485
early_print("%08x\t%s\n", p->nr, p->name);
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early_print("\nPlease check your kernel config and/or bootloader.\n");
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/* can't use cpu_relax() here as it may require MMU setup */;
493
int __init arm_add_memory(phys_addr_t start, unsigned long size)
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struct membank *bank = &meminfo.bank[meminfo.nr_banks];
497
if (meminfo.nr_banks >= NR_BANKS) {
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printk(KERN_CRIT "NR_BANKS too low, "
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"ignoring memory at 0x%08llx\n", (long long)start);
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* Ensure that start/size are aligned to a page boundary.
505
* Size is appropriately rounded down, start is rounded up.
507
size -= start & ~PAGE_MASK;
508
bank->start = PAGE_ALIGN(start);
509
bank->size = size & PAGE_MASK;
512
* Check whether this memory region has non-zero size or
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* invalid node number.
523
* Pick out the memory size. We look for mem=size@start,
524
* where start and size are "size[KkMm]"
526
static int __init early_mem(char *p)
528
static int usermem __initdata = 0;
534
* If the user specifies memory size, we
535
* blow away any automatically generated
540
meminfo.nr_banks = 0;
544
size = memparse(p, &endp);
546
start = memparse(endp + 1, NULL);
548
arm_add_memory(start, size);
552
early_param("mem", early_mem);
555
setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
557
#ifdef CONFIG_BLK_DEV_RAM
558
extern int rd_size, rd_image_start, rd_prompt, rd_doload;
560
rd_image_start = image_start;
569
static void __init request_standard_resources(struct machine_desc *mdesc)
571
struct memblock_region *region;
572
struct resource *res;
574
kernel_code.start = virt_to_phys(_text);
575
kernel_code.end = virt_to_phys(_etext - 1);
576
kernel_data.start = virt_to_phys(_sdata);
577
kernel_data.end = virt_to_phys(_end - 1);
579
for_each_memblock(memory, region) {
580
res = alloc_bootmem_low(sizeof(*res));
581
res->name = "System RAM";
582
res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
583
res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
584
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
586
request_resource(&iomem_resource, res);
588
if (kernel_code.start >= res->start &&
589
kernel_code.end <= res->end)
590
request_resource(res, &kernel_code);
591
if (kernel_data.start >= res->start &&
592
kernel_data.end <= res->end)
593
request_resource(res, &kernel_data);
596
if (mdesc->video_start) {
597
video_ram.start = mdesc->video_start;
598
video_ram.end = mdesc->video_end;
599
request_resource(&iomem_resource, &video_ram);
603
* Some machines don't have the possibility of ever
604
* possessing lp0, lp1 or lp2
606
if (mdesc->reserve_lp0)
607
request_resource(&ioport_resource, &lp0);
608
if (mdesc->reserve_lp1)
609
request_resource(&ioport_resource, &lp1);
610
if (mdesc->reserve_lp2)
611
request_resource(&ioport_resource, &lp2);
617
* This is the new way of passing data to the kernel at boot time. Rather
618
* than passing a fixed inflexible structure to the kernel, we pass a list
619
* of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
620
* tag for the list to be recognised (to distinguish the tagged list from
621
* a param_struct). The list is terminated with a zero-length tag (this tag
622
* is not parsed in any way).
624
static int __init parse_tag_core(const struct tag *tag)
626
if (tag->hdr.size > 2) {
627
if ((tag->u.core.flags & 1) == 0)
628
root_mountflags &= ~MS_RDONLY;
629
ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
634
__tagtable(ATAG_CORE, parse_tag_core);
636
static int __init parse_tag_mem32(const struct tag *tag)
638
return arm_add_memory(tag->u.mem.start, tag->u.mem.size);
641
__tagtable(ATAG_MEM, parse_tag_mem32);
643
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
644
struct screen_info screen_info = {
645
.orig_video_lines = 30,
646
.orig_video_cols = 80,
647
.orig_video_mode = 0,
648
.orig_video_ega_bx = 0,
649
.orig_video_isVGA = 1,
650
.orig_video_points = 8
653
static int __init parse_tag_videotext(const struct tag *tag)
655
screen_info.orig_x = tag->u.videotext.x;
656
screen_info.orig_y = tag->u.videotext.y;
657
screen_info.orig_video_page = tag->u.videotext.video_page;
658
screen_info.orig_video_mode = tag->u.videotext.video_mode;
659
screen_info.orig_video_cols = tag->u.videotext.video_cols;
660
screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
661
screen_info.orig_video_lines = tag->u.videotext.video_lines;
662
screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
663
screen_info.orig_video_points = tag->u.videotext.video_points;
667
__tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
670
static int __init parse_tag_ramdisk(const struct tag *tag)
672
setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
673
(tag->u.ramdisk.flags & 2) == 0,
674
tag->u.ramdisk.start, tag->u.ramdisk.size);
678
__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
680
static int __init parse_tag_serialnr(const struct tag *tag)
682
system_serial_low = tag->u.serialnr.low;
683
system_serial_high = tag->u.serialnr.high;
687
__tagtable(ATAG_SERIAL, parse_tag_serialnr);
689
static int __init parse_tag_revision(const struct tag *tag)
691
system_rev = tag->u.revision.rev;
695
__tagtable(ATAG_REVISION, parse_tag_revision);
697
static int __init parse_tag_cmdline(const struct tag *tag)
699
#if defined(CONFIG_CMDLINE_EXTEND)
700
strlcat(default_command_line, " ", COMMAND_LINE_SIZE);
701
strlcat(default_command_line, tag->u.cmdline.cmdline,
703
#elif defined(CONFIG_CMDLINE_FORCE)
704
pr_warning("Ignoring tag cmdline (using the default kernel command line)\n");
706
strlcpy(default_command_line, tag->u.cmdline.cmdline,
712
__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
715
* Scan the tag table for this tag, and call its parse function.
716
* The tag table is built by the linker from all the __tagtable
719
static int __init parse_tag(const struct tag *tag)
721
extern struct tagtable __tagtable_begin, __tagtable_end;
724
for (t = &__tagtable_begin; t < &__tagtable_end; t++)
725
if (tag->hdr.tag == t->tag) {
730
return t < &__tagtable_end;
734
* Parse all tags in the list, checking both the global and architecture
735
* specific tag tables.
737
static void __init parse_tags(const struct tag *t)
739
for (; t->hdr.size; t = tag_next(t))
742
"Ignoring unrecognised tag 0x%08x\n",
747
* This holds our defaults.
749
static struct init_tags {
750
struct tag_header hdr1;
751
struct tag_core core;
752
struct tag_header hdr2;
753
struct tag_mem32 mem;
754
struct tag_header hdr3;
755
} init_tags __initdata = {
756
{ tag_size(tag_core), ATAG_CORE },
757
{ 1, PAGE_SIZE, 0xff },
758
{ tag_size(tag_mem32), ATAG_MEM },
763
static int __init customize_machine(void)
765
/* customizes platform devices, or adds new ones */
766
if (machine_desc->init_machine)
767
machine_desc->init_machine();
770
arch_initcall(customize_machine);
773
static inline unsigned long long get_total_mem(void)
777
total = max_low_pfn - min_low_pfn;
778
return total << PAGE_SHIFT;
782
* reserve_crashkernel() - reserves memory are for crash kernel
784
* This function reserves memory area given in "crashkernel=" kernel command
785
* line parameter. The memory reserved is used by a dump capture kernel when
786
* primary kernel is crashing.
788
static void __init reserve_crashkernel(void)
790
unsigned long long crash_size, crash_base;
791
unsigned long long total_mem;
794
total_mem = get_total_mem();
795
ret = parse_crashkernel(boot_command_line, total_mem,
796
&crash_size, &crash_base);
800
ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
802
printk(KERN_WARNING "crashkernel reservation failed - "
803
"memory is in use (0x%lx)\n", (unsigned long)crash_base);
807
printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
808
"for crashkernel (System RAM: %ldMB)\n",
809
(unsigned long)(crash_size >> 20),
810
(unsigned long)(crash_base >> 20),
811
(unsigned long)(total_mem >> 20));
813
crashk_res.start = crash_base;
814
crashk_res.end = crash_base + crash_size - 1;
815
insert_resource(&iomem_resource, &crashk_res);
818
static inline void reserve_crashkernel(void) {}
819
#endif /* CONFIG_KEXEC */
821
static void __init squash_mem_tags(struct tag *tag)
823
for (; tag->hdr.size; tag = tag_next(tag))
824
if (tag->hdr.tag == ATAG_MEM)
825
tag->hdr.tag = ATAG_NONE;
828
static struct machine_desc * __init setup_machine_tags(unsigned int nr)
830
struct tag *tags = (struct tag *)&init_tags;
831
struct machine_desc *mdesc = NULL, *p;
832
char *from = default_command_line;
834
init_tags.mem.start = PHYS_OFFSET;
837
* locate machine in the list of supported machines.
839
for_each_machine_desc(p)
841
printk("Machine: %s\n", p->name);
847
early_print("\nError: unrecognized/unsupported machine ID"
848
" (r1 = 0x%08x).\n\n", nr);
849
dump_machine_table(); /* does not return */
853
tags = phys_to_virt(__atags_pointer);
854
else if (mdesc->atag_offset)
855
tags = (void *)(PAGE_OFFSET + mdesc->atag_offset);
857
#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
859
* If we have the old style parameters, convert them to
862
if (tags->hdr.tag != ATAG_CORE)
863
convert_to_tag_list(tags);
866
if (tags->hdr.tag != ATAG_CORE) {
867
#if defined(CONFIG_OF)
869
* If CONFIG_OF is set, then assume this is a reasonably
870
* modern system that should pass boot parameters
872
early_print("Warning: Neither atags nor dtb found\n");
874
tags = (struct tag *)&init_tags;
878
mdesc->fixup(tags, &from, &meminfo);
880
if (tags->hdr.tag == ATAG_CORE) {
881
if (meminfo.nr_banks != 0)
882
squash_mem_tags(tags);
887
/* parse_early_param needs a boot_command_line */
888
strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
894
void __init setup_arch(char **cmdline_p)
896
struct machine_desc *mdesc;
899
mdesc = setup_machine_fdt(__atags_pointer);
901
mdesc = setup_machine_tags(machine_arch_type);
902
machine_desc = mdesc;
903
machine_name = mdesc->name;
905
#ifdef CONFIG_ZONE_DMA
906
if (mdesc->dma_zone_size) {
907
extern unsigned long arm_dma_zone_size;
908
arm_dma_zone_size = mdesc->dma_zone_size;
911
if (mdesc->soft_reboot)
914
init_mm.start_code = (unsigned long) _text;
915
init_mm.end_code = (unsigned long) _etext;
916
init_mm.end_data = (unsigned long) _edata;
917
init_mm.brk = (unsigned long) _end;
919
/* populate cmd_line too for later use, preserving boot_command_line */
920
strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
921
*cmdline_p = cmd_line;
925
sanity_check_meminfo();
926
arm_memblock_init(&meminfo, mdesc);
929
request_standard_resources(mdesc);
931
unflatten_device_tree();
937
reserve_crashkernel();
941
#ifdef CONFIG_MULTI_IRQ_HANDLER
942
handle_arch_irq = mdesc->handle_irq;
946
#if defined(CONFIG_VGA_CONSOLE)
947
conswitchp = &vga_con;
948
#elif defined(CONFIG_DUMMY_CONSOLE)
949
conswitchp = &dummy_con;
954
if (mdesc->init_early)
959
static int __init topology_init(void)
963
for_each_possible_cpu(cpu) {
964
struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu);
965
cpuinfo->cpu.hotpluggable = 1;
966
register_cpu(&cpuinfo->cpu, cpu);
971
subsys_initcall(topology_init);
973
#ifdef CONFIG_HAVE_PROC_CPU
974
static int __init proc_cpu_init(void)
976
struct proc_dir_entry *res;
978
res = proc_mkdir("cpu", NULL);
983
fs_initcall(proc_cpu_init);
986
static const char *hwcap_str[] = {
1009
static int c_show(struct seq_file *m, void *v)
1013
seq_printf(m, "Processor\t: %s rev %d (%s)\n",
1014
cpu_name, read_cpuid_id() & 15, elf_platform);
1016
#if defined(CONFIG_SMP)
1017
for_each_online_cpu(i) {
1019
* glibc reads /proc/cpuinfo to determine the number of
1020
* online processors, looking for lines beginning with
1021
* "processor". Give glibc what it expects.
1023
seq_printf(m, "processor\t: %d\n", i);
1024
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
1025
per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
1026
(per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
1028
#else /* CONFIG_SMP */
1029
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
1030
loops_per_jiffy / (500000/HZ),
1031
(loops_per_jiffy / (5000/HZ)) % 100);
1034
/* dump out the processor features */
1035
seq_puts(m, "Features\t: ");
1037
for (i = 0; hwcap_str[i]; i++)
1038
if (elf_hwcap & (1 << i))
1039
seq_printf(m, "%s ", hwcap_str[i]);
1041
seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
1042
seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
1044
if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
1046
seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
1048
if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
1050
seq_printf(m, "CPU variant\t: 0x%02x\n",
1051
(read_cpuid_id() >> 16) & 127);
1054
seq_printf(m, "CPU variant\t: 0x%x\n",
1055
(read_cpuid_id() >> 20) & 15);
1057
seq_printf(m, "CPU part\t: 0x%03x\n",
1058
(read_cpuid_id() >> 4) & 0xfff);
1060
seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
1064
seq_printf(m, "Hardware\t: %s\n", machine_name);
1065
seq_printf(m, "Revision\t: %04x\n", system_rev);
1066
seq_printf(m, "Serial\t\t: %08x%08x\n",
1067
system_serial_high, system_serial_low);
1072
static void *c_start(struct seq_file *m, loff_t *pos)
1074
return *pos < 1 ? (void *)1 : NULL;
1077
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1083
static void c_stop(struct seq_file *m, void *v)
1087
const struct seq_operations cpuinfo_op = {