![Alon Bar-Lev](/assets/img/avatar_default.png)
1. Rename saved_command_line into boot_command_line. 2. Set command_line as __initdata. Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com> Cc: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
573 lines
14 KiB
C
573 lines
14 KiB
C
/*
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* linux/arch/arm26/kernel/setup.c
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*
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* Copyright (C) 1995-2001 Russell King
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* Copyright (C) 2003 Ian Molton
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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/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/blkdev.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/root_dev.h>
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#include <asm/elf.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/procinfo.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/tlbflush.h>
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#include <asm/irqchip.h>
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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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#ifdef CONFIG_PREEMPT
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DEFINE_SPINLOCK(kernel_flag);
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#endif
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#if defined(CONFIG_FPE_NWFPE)
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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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extern void paging_init(struct meminfo *);
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extern void convert_to_tag_list(struct tag *tags);
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extern void squash_mem_tags(struct tag *tag);
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extern void bootmem_init(struct meminfo *);
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extern int root_mountflags;
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extern int _stext, _text, _etext, _edata, _end;
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#ifdef CONFIG_XIP_KERNEL
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extern int _endtext, _sdata;
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#endif
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unsigned int processor_id;
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unsigned int __machine_arch_type;
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unsigned int system_rev;
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unsigned int system_serial_low;
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unsigned int system_serial_high;
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unsigned int elf_hwcap;
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unsigned int memc_ctrl_reg;
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unsigned int number_mfm_drives;
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struct processor processor;
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char elf_platform[ELF_PLATFORM_SIZE];
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unsigned long phys_initrd_start __initdata = 0;
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unsigned long phys_initrd_size __initdata = 0;
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static struct meminfo meminfo __initdata = { 0, };
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static struct proc_info_item proc_info;
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static const char *machine_name;
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static char __initdata command_line[COMMAND_LINE_SIZE];
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static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
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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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{ "Video RAM", 0, 0, IORESOURCE_MEM },
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{ "Kernel code", 0, 0, IORESOURCE_MEM },
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{ "Kernel data", 0, 0, IORESOURCE_MEM }
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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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{ "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY },
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{ "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY },
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{ "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY }
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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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#define dump_cpu_info() do { } while (0)
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static void __init setup_processor(void)
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{
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extern struct proc_info_list __proc_info_begin, __proc_info_end;
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struct proc_info_list *list;
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/*
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* locate processor in the list of supported processor
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* types. The linker builds this table for us from the
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* entries in arch/arm26/mm/proc-*.S
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*/
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for (list = &__proc_info_begin; list < &__proc_info_end ; list++)
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if ((processor_id & list->cpu_mask) == list->cpu_val)
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break;
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/*
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* If processor type is unrecognised, then we
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* can do nothing...
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*/
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if (list >= &__proc_info_end) {
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printk("CPU configuration botched (ID %08x), unable "
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"to continue.\n", processor_id);
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while (1);
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}
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proc_info = *list->info;
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processor = *list->proc;
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printk("CPU: %s %s revision %d\n",
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proc_info.manufacturer, proc_info.cpu_name,
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(int)processor_id & 15);
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dump_cpu_info();
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sprintf(init_utsname()->machine, "%s", list->arch_name);
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sprintf(elf_platform, "%s", list->elf_name);
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elf_hwcap = list->elf_hwcap;
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cpu_proc_init();
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}
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/*
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* Initial parsing of the command line. We need to pick out the
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* memory size. We look for mem=size@start, where start and size
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* are "size[KkMm]"
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*/
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static void __init
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parse_cmdline(struct meminfo *mi, char **cmdline_p, char *from)
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{
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char c = ' ', *to = command_line;
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int usermem = 0, len = 0;
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for (;;) {
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if (c == ' ' && !memcmp(from, "mem=", 4)) {
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unsigned long size, start;
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if (to != command_line)
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to -= 1;
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/*
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* If the user specifies memory size, we
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* blow away any automatically generated
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* size.
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*/
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if (usermem == 0) {
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usermem = 1;
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mi->nr_banks = 0;
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}
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start = PHYS_OFFSET;
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size = memparse(from + 4, &from);
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if (*from == '@')
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start = memparse(from + 1, &from);
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mi->bank[mi->nr_banks].start = start;
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mi->bank[mi->nr_banks].size = size;
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mi->bank[mi->nr_banks].node = PHYS_TO_NID(start);
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mi->nr_banks += 1;
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}
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c = *from++;
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if (!c)
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break;
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if (COMMAND_LINE_SIZE <= ++len)
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break;
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*to++ = c;
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}
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*to = '\0';
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*cmdline_p = command_line;
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}
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static void __init
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setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
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{
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#ifdef CONFIG_BLK_DEV_RAM
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extern int rd_size, rd_image_start, rd_prompt, rd_doload;
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rd_image_start = image_start;
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rd_prompt = prompt;
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rd_doload = doload;
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if (rd_sz)
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rd_size = rd_sz;
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#endif
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}
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static void __init
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request_standard_resources(struct meminfo *mi)
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{
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struct resource *res;
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int i;
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kernel_code.start = init_mm.start_code;
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kernel_code.end = init_mm.end_code - 1;
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#ifdef CONFIG_XIP_KERNEL
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kernel_data.start = init_mm.start_data;
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#else
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kernel_data.start = init_mm.end_code;
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#endif
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kernel_data.end = init_mm.brk - 1;
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for (i = 0; i < mi->nr_banks; i++) {
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unsigned long virt_start, virt_end;
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if (mi->bank[i].size == 0)
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continue;
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virt_start = mi->bank[i].start;
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virt_end = virt_start + mi->bank[i].size - 1;
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res = alloc_bootmem_low(sizeof(*res));
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res->name = "System RAM";
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res->start = virt_start;
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res->end = virt_end;
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res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
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request_resource(&iomem_resource, res);
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if (kernel_code.start >= res->start &&
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kernel_code.end <= res->end)
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request_resource(res, &kernel_code);
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if (kernel_data.start >= res->start &&
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kernel_data.end <= res->end)
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request_resource(res, &kernel_data);
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}
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/* FIXME - needed? if (mdesc->video_start) {
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video_ram.start = mdesc->video_start;
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video_ram.end = mdesc->video_end;
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request_resource(&iomem_resource, &video_ram);
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}*/
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/*
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* Some machines don't have the possibility of ever
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* possessing lp1 or lp2
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*/
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if (0) /* FIXME - need to do this for A5k at least */
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request_resource(&ioport_resource, &lp0);
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}
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/*
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* Tag parsing.
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*
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* This is the new way of passing data to the kernel at boot time. Rather
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* than passing a fixed inflexible structure to the kernel, we pass a list
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* of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
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* tag for the list to be recognised (to distinguish the tagged list from
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* a param_struct). The list is terminated with a zero-length tag (this tag
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* is not parsed in any way).
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*/
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static int __init parse_tag_core(const struct tag *tag)
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{
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if (tag->hdr.size > 2) {
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if ((tag->u.core.flags & 1) == 0)
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root_mountflags &= ~MS_RDONLY;
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ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
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}
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return 0;
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}
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__tagtable(ATAG_CORE, parse_tag_core);
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static int __init parse_tag_mem32(const struct tag *tag)
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{
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if (meminfo.nr_banks >= NR_BANKS) {
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printk(KERN_WARNING
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"Ignoring memory bank 0x%08x size %dKB\n",
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tag->u.mem.start, tag->u.mem.size / 1024);
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return -EINVAL;
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}
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meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start;
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meminfo.bank[meminfo.nr_banks].size = tag->u.mem.size;
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meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(tag->u.mem.start);
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meminfo.nr_banks += 1;
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return 0;
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}
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__tagtable(ATAG_MEM, parse_tag_mem32);
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#if defined(CONFIG_DUMMY_CONSOLE)
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struct screen_info screen_info = {
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.orig_video_lines = 30,
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.orig_video_cols = 80,
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.orig_video_mode = 0,
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.orig_video_ega_bx = 0,
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.orig_video_isVGA = 1,
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.orig_video_points = 8
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};
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static int __init parse_tag_videotext(const struct tag *tag)
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{
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screen_info.orig_x = tag->u.videotext.x;
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screen_info.orig_y = tag->u.videotext.y;
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screen_info.orig_video_page = tag->u.videotext.video_page;
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screen_info.orig_video_mode = tag->u.videotext.video_mode;
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screen_info.orig_video_cols = tag->u.videotext.video_cols;
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screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
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screen_info.orig_video_lines = tag->u.videotext.video_lines;
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screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
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screen_info.orig_video_points = tag->u.videotext.video_points;
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return 0;
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}
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__tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
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#endif
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static int __init parse_tag_acorn(const struct tag *tag)
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{
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memc_ctrl_reg = tag->u.acorn.memc_control_reg;
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number_mfm_drives = tag->u.acorn.adfsdrives;
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return 0;
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}
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__tagtable(ATAG_ACORN, parse_tag_acorn);
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static int __init parse_tag_ramdisk(const struct tag *tag)
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{
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setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
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(tag->u.ramdisk.flags & 2) == 0,
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tag->u.ramdisk.start, tag->u.ramdisk.size);
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return 0;
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}
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__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
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static int __init parse_tag_initrd(const struct tag *tag)
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{
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printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
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phys_initrd_start = (unsigned long)tag->u.initrd.start;
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phys_initrd_size = (unsigned long)tag->u.initrd.size;
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return 0;
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}
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__tagtable(ATAG_INITRD, parse_tag_initrd);
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static int __init parse_tag_initrd2(const struct tag *tag)
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{
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printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
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phys_initrd_start = (unsigned long)tag->u.initrd.start;
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phys_initrd_size = (unsigned long)tag->u.initrd.size;
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return 0;
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}
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__tagtable(ATAG_INITRD2, parse_tag_initrd2);
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static int __init parse_tag_serialnr(const struct tag *tag)
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{
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system_serial_low = tag->u.serialnr.low;
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system_serial_high = tag->u.serialnr.high;
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return 0;
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}
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__tagtable(ATAG_SERIAL, parse_tag_serialnr);
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static int __init parse_tag_revision(const struct tag *tag)
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{
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system_rev = tag->u.revision.rev;
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return 0;
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}
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__tagtable(ATAG_REVISION, parse_tag_revision);
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static int __init parse_tag_cmdline(const struct tag *tag)
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{
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strncpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
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default_command_line[COMMAND_LINE_SIZE - 1] = '\0';
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return 0;
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}
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__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
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/*
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* Scan the tag table for this tag, and call its parse function.
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* The tag table is built by the linker from all the __tagtable
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* declarations.
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*/
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static int __init parse_tag(const struct tag *tag)
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{
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extern struct tagtable __tagtable_begin, __tagtable_end;
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struct tagtable *t;
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for (t = &__tagtable_begin; t < &__tagtable_end; t++)
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if (tag->hdr.tag == t->tag) {
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t->parse(tag);
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break;
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}
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return t < &__tagtable_end;
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}
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/*
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* Parse all tags in the list, checking both the global and architecture
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* specific tag tables.
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*/
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static void __init parse_tags(const struct tag *t)
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{
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for (; t->hdr.size; t = tag_next(t))
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if (!parse_tag(t))
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printk(KERN_WARNING
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"Ignoring unrecognised tag 0x%08x\n",
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t->hdr.tag);
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}
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/*
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* This holds our defaults.
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*/
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static struct init_tags {
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struct tag_header hdr1;
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struct tag_core core;
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struct tag_header hdr2;
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struct tag_mem32 mem;
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struct tag_header hdr3;
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} init_tags __initdata = {
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{ tag_size(tag_core), ATAG_CORE },
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{ 1, PAGE_SIZE, 0xff },
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{ tag_size(tag_mem32), ATAG_MEM },
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{ MEM_SIZE, PHYS_OFFSET },
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{ 0, ATAG_NONE }
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};
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void __init setup_arch(char **cmdline_p)
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{
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struct tag *tags = (struct tag *)&init_tags;
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char *from = default_command_line;
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setup_processor();
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if(machine_arch_type == MACH_TYPE_A5K)
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machine_name = "A5000";
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else if(machine_arch_type == MACH_TYPE_ARCHIMEDES)
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machine_name = "Archimedes";
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else
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machine_name = "UNKNOWN";
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//FIXME - the tag struct is always copied here but this is a block
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// of RAM that is accidentally reserved along with video RAM. perhaps
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// it would be a good idea to explicitly reserve this?
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tags = (struct tag *)0x0207c000;
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/*
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* If we have the old style parameters, convert them to
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* a tag list.
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*/
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if (tags->hdr.tag != ATAG_CORE)
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convert_to_tag_list(tags);
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if (tags->hdr.tag != ATAG_CORE)
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tags = (struct tag *)&init_tags;
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if (tags->hdr.tag == ATAG_CORE) {
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if (meminfo.nr_banks != 0)
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squash_mem_tags(tags);
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parse_tags(tags);
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}
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init_mm.start_code = (unsigned long) &_text;
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#ifndef CONFIG_XIP_KERNEL
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init_mm.end_code = (unsigned long) &_etext;
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#else
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init_mm.end_code = (unsigned long) &_endtext;
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init_mm.start_data = (unsigned long) &_sdata;
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#endif
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init_mm.end_data = (unsigned long) &_edata;
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init_mm.brk = (unsigned long) &_end;
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memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
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boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
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parse_cmdline(&meminfo, cmdline_p, from);
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bootmem_init(&meminfo);
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paging_init(&meminfo);
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request_standard_resources(&meminfo);
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#ifdef CONFIG_VT
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#if defined(CONFIG_DUMMY_CONSOLE)
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conswitchp = &dummy_con;
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#endif
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#endif
|
|
}
|
|
|
|
static const char *hwcap_str[] = {
|
|
"swp",
|
|
"half",
|
|
"thumb",
|
|
"26bit",
|
|
"fastmult",
|
|
"fpa",
|
|
"vfp",
|
|
"edsp",
|
|
NULL
|
|
};
|
|
|
|
static int c_show(struct seq_file *m, void *v)
|
|
{
|
|
int i;
|
|
|
|
seq_printf(m, "Processor\t: %s %s rev %d (%s)\n",
|
|
proc_info.manufacturer, proc_info.cpu_name,
|
|
(int)processor_id & 15, elf_platform);
|
|
|
|
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
|
|
loops_per_jiffy / (500000/HZ),
|
|
(loops_per_jiffy / (5000/HZ)) % 100);
|
|
|
|
/* 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_puts(m, "\n");
|
|
|
|
seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4);
|
|
seq_printf(m, "CPU revision\t: %d\n\n", processor_id & 15);
|
|
seq_printf(m, "Hardware\t: %s\n", machine_name);
|
|
seq_printf(m, "Revision\t: %04x\n", system_rev);
|
|
seq_printf(m, "Serial\t\t: %08x%08x\n",
|
|
system_serial_high, system_serial_low);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < 1 ? (void *)1 : NULL;
|
|
}
|
|
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return NULL;
|
|
}
|
|
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
|
|
struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = c_show
|
|
};
|