diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/setup.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/kernel/setup.c | 1132 |
1 files changed, 0 insertions, 1132 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/setup.c b/ANDROID_3.4.5/arch/arm/kernel/setup.c deleted file mode 100644 index ebfac782..00000000 --- a/ANDROID_3.4.5/arch/arm/kernel/setup.c +++ /dev/null @@ -1,1132 +0,0 @@ -/* - * 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/export.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/screen_info.h> -#include <linux/init.h> -#include <linux/kexec.h> -#include <linux/of_fdt.h> -#include <linux/root_dev.h> -#include <linux/cpu.h> -#include <linux/interrupt.h> -#include <linux/smp.h> -#include <linux/fs.h> -#include <linux/proc_fs.h> -#include <linux/memblock.h> -#include <linux/bug.h> -#include <linux/compiler.h> -#include <linux/sort.h> - -#include <asm/unified.h> -#include <asm/cp15.h> -#include <asm/cpu.h> -#include <asm/cputype.h> -#include <asm/elf.h> -#include <asm/procinfo.h> -#include <asm/sections.h> -#include <asm/setup.h> -#include <asm/smp_plat.h> -#include <asm/mach-types.h> -#include <asm/cacheflush.h> -#include <asm/cachetype.h> -#include <asm/tlbflush.h> - -#include <asm/prom.h> -#include <asm/mach/arch.h> -#include <asm/mach/irq.h> -#include <asm/mach/time.h> -#include <asm/system_info.h> -#include <asm/system_misc.h> -#include <asm/traps.h> -#include <asm/unwind.h> -#include <asm/memblock.h> - -#if defined(CONFIG_DEPRECATED_PARAM_STRUCT) -#include "compat.h" -#endif -#include "atags.h" -#include "tcm.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 void paging_init(struct machine_desc *desc); -extern void sanity_check_meminfo(void); -extern void reboot_setup(char *str); - -unsigned int processor_id; -EXPORT_SYMBOL(processor_id); -unsigned int __machine_arch_type __read_mostly; -EXPORT_SYMBOL(__machine_arch_type); -unsigned int cacheid __read_mostly; -EXPORT_SYMBOL(cacheid); - -unsigned int __atags_pointer __initdata; - -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 __read_mostly; -EXPORT_SYMBOL(elf_hwcap); - - -#ifdef MULTI_CPU -struct processor processor __read_mostly; -#endif -#ifdef MULTI_TLB -struct cpu_tlb_fns cpu_tlb __read_mostly; -#endif -#ifdef MULTI_USER -struct cpu_user_fns cpu_user __read_mostly; -#endif -#ifdef MULTI_CACHE -struct cpu_cache_fns cpu_cache __read_mostly; -#endif -#ifdef CONFIG_OUTER_CACHE -struct outer_cache_fns outer_cache __read_mostly; -EXPORT_SYMBOL(outer_cache); -#endif - -/* - * Cached cpu_architecture() result for use by assembler code. - * C code should use the cpu_architecture() function instead of accessing this - * variable directly. - */ -int __cpu_architecture __read_mostly = CPU_ARCH_UNKNOWN; - -struct stack { - u32 irq[3]; - u32 abt[3]; - u32 und[3]; -} ____cacheline_aligned; - -static struct stack stacks[NR_CPUS]; - -char elf_platform[ELF_PLATFORM_SIZE]; -EXPORT_SYMBOL(elf_platform); - -static const char *cpu_name; -static const char *machine_name; -static char __initdata cmd_line[COMMAND_LINE_SIZE]; -struct machine_desc *machine_desc __initdata; - -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[] = { - { - .name = "Video RAM", - .start = 0, - .end = 0, - .flags = IORESOURCE_MEM - }, - { - .name = "Kernel code", - .start = 0, - .end = 0, - .flags = IORESOURCE_MEM - }, - { - .name = "Kernel data", - .start = 0, - .end = 0, - .flags = 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[] = { - { - .name = "reserved", - .start = 0x3bc, - .end = 0x3be, - .flags = IORESOURCE_IO | IORESOURCE_BUSY - }, - { - .name = "reserved", - .start = 0x378, - .end = 0x37f, - .flags = IORESOURCE_IO | IORESOURCE_BUSY - }, - { - .name = "reserved", - .start = 0x278, - .end = 0x27f, - .flags = IORESOURCE_IO | IORESOURCE_BUSY - } -}; - -#define lp0 io_res[0] -#define lp1 io_res[1] -#define lp2 io_res[2] - -static const char *proc_arch[] = { - "undefined/unknown", - "3", - "4", - "4T", - "5", - "5T", - "5TE", - "5TEJ", - "6TEJ", - "7", - "?(11)", - "?(12)", - "?(13)", - "?(14)", - "?(15)", - "?(16)", - "?(17)", -}; - -static int __get_cpu_architecture(void) -{ - int cpu_arch; - - if ((read_cpuid_id() & 0x0008f000) == 0) { - cpu_arch = CPU_ARCH_UNKNOWN; - } else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) { - cpu_arch = (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; - } else if ((read_cpuid_id() & 0x00080000) == 0x00000000) { - cpu_arch = (read_cpuid_id() >> 16) & 7; - if (cpu_arch) - cpu_arch += CPU_ARCH_ARMv3; - } else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) { - unsigned int mmfr0; - - /* Revised CPUID format. Read the Memory Model Feature - * Register 0 and check for VMSAv7 or PMSAv7 */ - asm("mrc p15, 0, %0, c0, c1, 4" - : "=r" (mmfr0)); - if ((mmfr0 & 0x0000000f) >= 0x00000003 || - (mmfr0 & 0x000000f0) >= 0x00000030) - cpu_arch = CPU_ARCH_ARMv7; - else if ((mmfr0 & 0x0000000f) == 0x00000002 || - (mmfr0 & 0x000000f0) == 0x00000020) - cpu_arch = CPU_ARCH_ARMv6; - else - cpu_arch = CPU_ARCH_UNKNOWN; - } else - cpu_arch = CPU_ARCH_UNKNOWN; - - return cpu_arch; -} - -int __pure cpu_architecture(void) -{ - BUG_ON(__cpu_architecture == CPU_ARCH_UNKNOWN); - - return __cpu_architecture; -} - -static int cpu_has_aliasing_icache(unsigned int arch) -{ - int aliasing_icache; - unsigned int id_reg, num_sets, line_size; - - /* PIPT caches never alias. */ - if (icache_is_pipt()) - return 0; - - /* arch specifies the register format */ - switch (arch) { - case CPU_ARCH_ARMv7: - asm("mcr p15, 2, %0, c0, c0, 0 @ set CSSELR" - : /* No output operands */ - : "r" (1)); - isb(); - asm("mrc p15, 1, %0, c0, c0, 0 @ read CCSIDR" - : "=r" (id_reg)); - line_size = 4 << ((id_reg & 0x7) + 2); - num_sets = ((id_reg >> 13) & 0x7fff) + 1; - aliasing_icache = (line_size * num_sets) > PAGE_SIZE; - break; - case CPU_ARCH_ARMv6: - aliasing_icache = read_cpuid_cachetype() & (1 << 11); - break; - default: - /* I-cache aliases will be handled by D-cache aliasing code */ - aliasing_icache = 0; - } - - return aliasing_icache; -} - -static void __init cacheid_init(void) -{ - unsigned int cachetype = read_cpuid_cachetype(); - unsigned int arch = cpu_architecture(); - - if (arch >= CPU_ARCH_ARMv6) { - if ((cachetype & (7 << 29)) == 4 << 29) { - /* ARMv7 register format */ - arch = CPU_ARCH_ARMv7; - cacheid = CACHEID_VIPT_NONALIASING; - switch (cachetype & (3 << 14)) { - case (1 << 14): - cacheid |= CACHEID_ASID_TAGGED; - break; - case (3 << 14): - cacheid |= CACHEID_PIPT; - break; - } - } else { - arch = CPU_ARCH_ARMv6; - if (cachetype & (1 << 23)) - cacheid = CACHEID_VIPT_ALIASING; - else - cacheid = CACHEID_VIPT_NONALIASING; - } - if (cpu_has_aliasing_icache(arch)) - cacheid |= CACHEID_VIPT_I_ALIASING; - } else { - cacheid = CACHEID_VIVT; - } - - printk("CPU: %s data cache, %s instruction cache\n", - cache_is_vivt() ? "VIVT" : - cache_is_vipt_aliasing() ? "VIPT aliasing" : - cache_is_vipt_nonaliasing() ? "PIPT / VIPT nonaliasing" : "unknown", - cache_is_vivt() ? "VIVT" : - icache_is_vivt_asid_tagged() ? "VIVT ASID tagged" : - icache_is_vipt_aliasing() ? "VIPT aliasing" : - icache_is_pipt() ? "PIPT" : - cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown"); -} - -/* - * These functions re-use the assembly code in head.S, which - * already provide the required functionality. - */ -extern struct proc_info_list *lookup_processor_type(unsigned int); - -void __init early_print(const char *str, ...) -{ - extern void printascii(const char *); - char buf[256]; - va_list ap; - - va_start(ap, str); - vsnprintf(buf, sizeof(buf), str, ap); - va_end(ap); - -#ifdef CONFIG_DEBUG_LL - printascii(buf); -#endif - printk("%s", buf); -} - -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; -} - -/* - * cpu_init - initialise one CPU. - * - * cpu_init sets up the per-CPU stacks. - */ -void cpu_init(void) -{ - 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(); - } - - cpu_proc_init(); - - /* - * 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 - - /* - * setup stacks for re-entrant exception handlers - */ - __asm__ ( - "msr cpsr_c, %1\n\t" - "add r14, %0, %2\n\t" - "mov sp, r14\n\t" - "msr cpsr_c, %3\n\t" - "add r14, %0, %4\n\t" - "mov sp, r14\n\t" - "msr cpsr_c, %5\n\t" - "add r14, %0, %6\n\t" - "mov sp, r14\n\t" - "msr cpsr_c, %7" - : - : "r" (stk), - PLC (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), - "I" (offsetof(struct stack, irq[0])), - PLC (PSR_F_BIT | PSR_I_BIT | ABT_MODE), - "I" (offsetof(struct stack, abt[0])), - PLC (PSR_F_BIT | PSR_I_BIT | UND_MODE), - "I" (offsetof(struct stack, und[0])), - PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE) - : "r14"); -} - -int __cpu_logical_map[NR_CPUS]; - -void __init smp_setup_processor_id(void) -{ - int i; - u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0; - - cpu_logical_map(0) = cpu; - for (i = 1; i < NR_CPUS; ++i) - cpu_logical_map(i) = i == cpu ? 0 : i; - - printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu); -} - -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(read_cpuid_id()); - if (!list) { - printk("CPU configuration botched (ID %08x), unable " - "to continue.\n", read_cpuid_id()); - while (1); - } - - cpu_name = list->cpu_name; - __cpu_architecture = __get_cpu_architecture(); - -#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), cr=%08lx\n", - cpu_name, read_cpuid_id(), read_cpuid_id() & 15, - proc_arch[cpu_architecture()], cr_alignment); - - snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c", - list->arch_name, ENDIANNESS); - snprintf(elf_platform, ELF_PLATFORM_SIZE, "%s%c", - list->elf_name, ENDIANNESS); - elf_hwcap = list->elf_hwcap; -#ifndef CONFIG_ARM_THUMB - elf_hwcap &= ~HWCAP_THUMB; -#endif - - feat_v6_fixup(); - - cacheid_init(); - cpu_init(); -} - -void __init dump_machine_table(void) -{ - struct machine_desc *p; - - early_print("Available machine support:\n\nID (hex)\tNAME\n"); - for_each_machine_desc(p) - early_print("%08x\t%s\n", p->nr, p->name); - - early_print("\nPlease check your kernel config and/or bootloader.\n"); - - while (true) - /* can't use cpu_relax() here as it may require MMU setup */; -} - -int __init arm_add_memory(phys_addr_t start, unsigned long size) -{ - struct membank *bank = &meminfo.bank[meminfo.nr_banks]; - - if (meminfo.nr_banks >= NR_BANKS) { - printk(KERN_CRIT "NR_BANKS too low, " - "ignoring memory at 0x%08llx\n", (long long)start); - return -EINVAL; - } - - /* - * Ensure that start/size are aligned to a page boundary. - * Size is appropriately rounded down, start is rounded up. - */ - size -= start & ~PAGE_MASK; - bank->start = PAGE_ALIGN(start); - -#ifndef CONFIG_LPAE - if (bank->start + size < bank->start) { - printk(KERN_CRIT "Truncating memory at 0x%08llx to fit in " - "32-bit physical address space\n", (long long)start); - /* - * To ensure bank->start + bank->size is representable in - * 32 bits, we use ULONG_MAX as the upper limit rather than 4GB. - * This means we lose a page after masking. - */ - size = ULONG_MAX - bank->start; - } -#endif - - bank->size = size & PAGE_MASK; - - /* - * Check whether this memory region has non-zero size or - * invalid node number. - */ - if (bank->size == 0) - return -EINVAL; - - meminfo.nr_banks++; - return 0; -} - -/* - * Pick out the memory size. We look for mem=size@start, - * where start and size are "size[KkMm]" - */ -static int __init early_mem(char *p) -{ - static int usermem __initdata = 0; - unsigned long size; - phys_addr_t start; - char *endp; - - /* - * 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, &endp); - if (*endp == '@') - start = memparse(endp + 1, NULL); - - arm_add_memory(start, size); - - return 0; -} -early_param("mem", early_mem); - -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 machine_desc *mdesc) -{ - struct memblock_region *region; - struct resource *res; - - kernel_code.start = virt_to_phys(_text); - kernel_code.end = virt_to_phys(_etext - 1); - kernel_data.start = virt_to_phys(_sdata); - kernel_data.end = virt_to_phys(_end - 1); - - for_each_memblock(memory, region) { - res = alloc_bootmem_low(sizeof(*res)); - res->name = "System RAM"; - res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); - res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; - 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) -{ - return arm_add_memory(tag->u.mem.start, tag->u.mem.size); -} - -__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) -{ -#if defined(CONFIG_CMDLINE_EXTEND) - strlcat(default_command_line, " ", COMMAND_LINE_SIZE); - strlcat(default_command_line, tag->u.cmdline.cmdline, - COMMAND_LINE_SIZE); -#elif defined(CONFIG_CMDLINE_FORCE) - pr_warning("Ignoring tag cmdline (using the default kernel command line)\n"); -#else - strlcpy(default_command_line, tag->u.cmdline.cmdline, - COMMAND_LINE_SIZE); -#endif - 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 }, - { 0, ATAG_NONE } -}; - -static int __init customize_machine(void) -{ - /* customizes platform devices, or adds new ones */ - if (machine_desc->init_machine) - machine_desc->init_machine(); - return 0; -} -arch_initcall(customize_machine); - -#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 */ - -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; -} - -static struct machine_desc * __init setup_machine_tags(unsigned int nr) -{ - struct tag *tags = (struct tag *)&init_tags; - struct machine_desc *mdesc = NULL, *p; - char *from = default_command_line; - - init_tags.mem.start = PHYS_OFFSET; - - /* - * locate machine in the list of supported machines. - */ - for_each_machine_desc(p) - if (nr == p->nr) { - printk("Machine: %s\n", p->name); - mdesc = p; - break; - } - - if (!mdesc) { - early_print("\nError: unrecognized/unsupported machine ID" - " (r1 = 0x%08x).\n\n", nr); - dump_machine_table(); /* does not return */ - } - - if (__atags_pointer) - tags = phys_to_virt(__atags_pointer); - else if (mdesc->atag_offset) - tags = (void *)(PAGE_OFFSET + mdesc->atag_offset); - -#if defined(CONFIG_DEPRECATED_PARAM_STRUCT) - /* - * If we have the old style parameters, convert them to - * a tag list. - */ - if (tags->hdr.tag != ATAG_CORE) - convert_to_tag_list(tags); -#endif - - if (tags->hdr.tag != ATAG_CORE) { -#if defined(CONFIG_OF) - /* - * If CONFIG_OF is set, then assume this is a reasonably - * modern system that should pass boot parameters - */ - early_print("Warning: Neither atags nor dtb found\n"); -#endif - tags = (struct tag *)&init_tags; - } - - if (mdesc->fixup) - mdesc->fixup(tags, &from, &meminfo); - - if (tags->hdr.tag == ATAG_CORE) { - if (meminfo.nr_banks != 0) - squash_mem_tags(tags); - save_atags(tags); - parse_tags(tags); - } - - /* parse_early_param needs a boot_command_line */ - strlcpy(boot_command_line, from, COMMAND_LINE_SIZE); - - return mdesc; -} - -static int __init meminfo_cmp(const void *_a, const void *_b) -{ - const struct membank *a = _a, *b = _b; - long cmp = bank_pfn_start(a) - bank_pfn_start(b); - return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; -} - -void __init setup_arch(char **cmdline_p) -{ - struct machine_desc *mdesc; - - setup_processor(); - mdesc = setup_machine_fdt(__atags_pointer); - if (!mdesc) - mdesc = setup_machine_tags(machine_arch_type); - machine_desc = mdesc; - machine_name = mdesc->name; - -#ifdef CONFIG_ZONE_DMA - if (mdesc->dma_zone_size) { - extern unsigned long arm_dma_zone_size; - arm_dma_zone_size = mdesc->dma_zone_size; - } -#endif - if (mdesc->restart_mode) - reboot_setup(&mdesc->restart_mode); - - 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; - - /* populate cmd_line too for later use, preserving boot_command_line */ - strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); - *cmdline_p = cmd_line; - - parse_early_param(); - - sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL); - sanity_check_meminfo(); - arm_memblock_init(&meminfo, mdesc); - - paging_init(mdesc); - request_standard_resources(mdesc); - - if (mdesc->restart) - arm_pm_restart = mdesc->restart; - - unflatten_device_tree(); - -#ifdef CONFIG_SMP - if (is_smp()) - smp_init_cpus(); -#endif - reserve_crashkernel(); - - tcm_init(); - -#ifdef CONFIG_MULTI_IRQ_HANDLER - handle_arch_irq = mdesc->handle_irq; -#endif - -#ifdef CONFIG_VT -#if defined(CONFIG_VGA_CONSOLE) - conswitchp = &vga_con; -#elif defined(CONFIG_DUMMY_CONSOLE) - conswitchp = &dummy_con; -#endif -#endif - - if (mdesc->init_early) - mdesc->init_early(); -} - - -static int __init topology_init(void) -{ - int cpu; - - for_each_possible_cpu(cpu) { - struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu); - cpuinfo->cpu.hotpluggable = 1; - register_cpu(&cpuinfo->cpu, cpu); - } - - return 0; -} -subsys_initcall(topology_init); - -#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 - -static const char *hwcap_str[] = { - "swp", - "half", - "thumb", - "26bit", - "fastmult", - "fpa", - "vfp", - "edsp", - "java", - "iwmmxt", - "crunch", - "thumbee", - "neon", - "vfpv3", - "vfpv3d16", - "tls", - "vfpv4", - "idiva", - "idivt", - NULL -}; - -static int c_show(struct seq_file *m, void *v) -{ - int i; - - seq_printf(m, "Processor\t: %s rev %d (%s)\n", - cpu_name, read_cpuid_id() & 15, elf_platform); - -#if defined(CONFIG_SMP) - for_each_online_cpu(i) { - /* - * 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); - 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", read_cpuid_id() >> 24); - seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); - - if ((read_cpuid_id() & 0x0008f000) == 0x00000000) { - /* pre-ARM7 */ - seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4); - } else { - if ((read_cpuid_id() & 0x0008f000) == 0x00007000) { - /* ARM7 */ - seq_printf(m, "CPU variant\t: 0x%02x\n", - (read_cpuid_id() >> 16) & 127); - } else { - /* post-ARM7 */ - seq_printf(m, "CPU variant\t: 0x%x\n", - (read_cpuid_id() >> 20) & 15); - } - seq_printf(m, "CPU part\t: 0x%03x\n", - (read_cpuid_id() >> 4) & 0xfff); - } - seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15); - - 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) -{ -} - -const struct seq_operations cpuinfo_op = { - .start = c_start, - .next = c_next, - .stop = c_stop, - .show = c_show -}; |