Bootloader

• 探索 Linux bootloader 的佳作
• kboot 初探與模擬驗證
• Christopher Hallinan 的大作《Embedded Linux Primer》裡面的第七章〈Bootloaders〉
• 嵌入式系统 Boot Loader 技术内幕
• Booting ARM Linux
• 嵌入式Linux系统开发技术详解-基于ARM - 第6章　Bootloader

Qi

• Qi

U-Boot

• Das U-Boot
  • U-boot 初探
  • U-boot 二探-開機流程
  • U-boot 三探-Device 架構
  • Introduction to Das U-Boot, the universal open source bootloader
  • http://www.denx.de/wiki/bin/view/DULG/Manual
  • U-Boot 測試 >> NAND Flash
  • uboot mkimage的用法
  • u-boot nand flash read/write cmd
  • U-Boot TFTP Download
  • Chapter: 9.5 U-Boot
  • u-boot命令介绍及烧写程序实例

CFE

• CFE(Common Firmware Environment)
• [Linux 使用NFS作為filesystem root(rootfs)]

YAMON

• YAMON - MPS Technology

RedBoot

• RedBoot

GRUB

• GRUB(the Grand Unified Boot loader)
  • GNU GRUB Manual 0.97
  • /boot/grub/menu.lst
  • 動手學 grub
  • SUSE LINUX – Administration Guide - 7.4. Booting with GRUB
  • how does root=LABEL=xxx really work?
  • Making a Dedicated Grub Partition
  • 2.2. GRUB

LILO

• LILO(LInux LOader)
  • lilo.conf

SUSLINUX

• SYSLINUX
  • syslinux.cfg
  • The original SYSLINUX, used for booting from FAT filesystems
  • ISOLINUX, used for booting from CD-ROM ISO 9660 filesystems
  • PXELINUX, used for booting from a network server using the Preboot Execution Environment (PXE) system
  • EXTLINUX, used to boot from Linux ext2/ext3 filesystems
  • MEMDISK, used to boot older operating systems like MS-DOS from these media

• General Command

Explain	U-Boot	CFE	YAMON
interrupt booting	pressing any key	Ctrl+C
online help	help/?	help
board info structure	bdinfo	show soc
reset cpu	reset	reset
run commands in аn environment vаriаble	run

• Environment Variables Command

Explain	U-Boot	CFE	YAMON
print environment variables	printenv	printenv
set environment variables	setenv variable value	setenv variable value
unset environment variables	setenv variable	unsetenv variable
save environment variables to persistent storage	saveenv	setenv -p variable value

• Download/Boot/Go Command

Explain	U-Boot	CFE	YAMON
invoke DHCP client to obtain IP	dhcp	ifconfig device -auto
	loads	load serial_device
transfer image by TFTP	tftp	load -raw host:filename
boot from memory	bootm
transfer image by TFTP, then bootm	ftpboot	boot -elf -z host:filename
get ipaddr by BOOTP/DHCP, then ftpboot	bootp	ifconfig device -auto;boot -elf -z host:filename
start application	go	go

• Flash Command

Explain	U-Boot	CFE	YAMON
	flinfo	show flash
Linux compatible MTD partition	mtdparts
update flash	cp ("knows" about flash memory areas)	flash
	erase
	nand info
	nand device
	nand read
	nand write
	nand erase

• Environment Variable

Explain	U-Boot	CFE	YAMON
ethernet device		NET_DEVICE
IP address for TFTP	ipaddr	NET_IPADDR
subnet Mask	netmask	NET_NETMASK
target hostname	hostname
TFTP server IP address	serverip
default image loaded with TFTP	bootfile
default load address	loadaddr
passed to Linux kernel as boot arguments (aka "command line")	bootargs
command automatically executed when starting	bootcmd	STARTUP
	bootdelay

• Devices

Explain	U-Boot	CFE	YAMON
store the environment variables		eeprom0
		eeprom1
		flash0
		flash1
		eth0
		eth1