Linux 内核启动分析
1. 内核启动地址
1.1. 名词解释
ZTEXTADDR
解压代码运行的开始地址。没有物理地址和虚拟地址之分，因为此时MMU处于关闭状态。这个地址不一定时RAM的地址，可以是支持读写寻址的flash等存储中介。
Start address of decompressor. here's no point in talking about virtual or physical addresses here, since the MMU will be off at the time when you call the decompressor code. You normally call the kernel at this address to start it booting. This doesn't have to be located in RAM, it can be in flash or other read-only or read-write addressable medium.
ZRELADDR
内核启动在RAM中的地址。压缩的内核映像被解压到这个地址，然后执行。
This is the address where the decompressed kernel will be written, and eventually executed. The following constraint must be valid:
__virt_to_phys(TEXTADDR) == ZRELADDR
The initial part of the kernel is carefully coded to be position independent.
TEXTADDR
内核启动的虚拟地址，与ZRELADDR相对应。一般内核启动的虚拟地址为RAM的第一个bank地址加上0x8000。
TEXTADDR = PAGE_OFFSET + TEXTOFFST
Virtual start address of kernel, normally PAGE_OFFSET + 0x8000.This is where the kernel image ends up. With the latest kernels, it must be located at 32768 bytes into a 128MB region. Previous kernels placed a restriction of 256MB here.
TEXTOFFSET
内核偏移地址。在arch/arm/makefile中设定。
PHYS_OFFSET
RAM第一个bank的物理起始地址。
Physical start address of the first bank of RAM.
PAGE_OFFSET
RAM第一个bank的虚拟起始地址。
Virtual start address of t
分享一下我在网上看到的硬盘安装Linux 9.0的相关操作：
下面有两种安装方法.
<A>从dos安装.这方法可以不用软盘,比较方便.
<A.1> 得到dosutils目录
这个目录里有从dos安装和软盘安装的工具.一般都在第一个iso文件里.
在linux下可以这样装载iso文件.
mount -o loop valhalla-i386-disc1.iso /mnt/cdro ......
