Linux-4.1.15启动分析

一：链接脚本分析启动入口

arch/arm/kernel/vmlinux.lds

 *  arch/arm/include/asm/page.h
 *
 *  Copyright (C) 1995-2003 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.
 */
OUTPUT_ARCH(arm)
ENTRY(stext)
jiffies = jiffies_64;
SECTIONS
{

... ...

由链接脚本可知启动入口为“ENTRY(stext)”，位于arch/arm/kernel/head.S

二：Linux启动流程分析

1、arch/arm/kernel/head.S

注释说明linux内核启动之前要求关闭MMU，关闭D-cache，不关心I-cache，r0=0.....

/*
 * Kernel startup entry point.
 * ---------------------------
 *