Linux——arm Uboot Makefile学习笔记（1）
配置说明：jZ2440开发板
涉及文件：u-boot-1.1.6.tar.bz2
u-boot-1.1.6_jz2440.patch
Readmewenjian
1.Linux的概览图，对Uboot的结构先有具体的了解。
2.Readme文件的结构
====================
- board Board dependent files
开发板相关文件
- common Misc architecture independent functions
多体系结构独立函数
- cpu CPU specific files
CPU相关文件
- disk Code for disk drive partition handling
磁盘驱动，及分区操作的代码
- doc Documentation (don't expect too much)
文档
- drivers Commonly used device drivers
通用设备驱动
- dtt Digital Thermometer and Thermostat drivers
数字温度器及调温装置驱动
- examples Example code for standalone applications, etc.
独立应用程序的例子
- include Header Files
头文件
- lib_arm Files generic to ARMarchitecture
ARM体系结构通用的文件
- lib_avr32 Files generic to AVR32architecture
- lib_generic Files generic to allarchitectures
所有体系结构通用的文件
- lib_i386 Files generic to i386architecture
- lib_m68k Files generic to m68karchitecture
- lib_mips Files generic to MIPSarchitecture
- lib_nios Files generic to NIOSarchitecture
- lib_ppc Files generic to PowerPC architecture
- lib_sparc Files generic to SPARCarchitecture
- libfdt Library files to support flattened device trees
支持平板设备树的库文件
- net Networking code
网络代码
- post Power On Self Test
上电自检
- rtc Real Time Clock drivers
实时时钟驱动
- tools Tools to build S-Record or U-Boot images, etc.
编译S-Record和U-Boot镜像的工具
- api
1.3版本的UBOOT还增加了一个API的文件夹，
这里放的是一些扩展应用的独立的API函数
Software Configuration:
软件配置：
=======================
Configuration is usually done using C preprocessor defines; the
rationale behind that is to avoid dead code whenever possible.
配置是通过C预处理程序完成。
There are two classes of configuration variables:
有两类配置变量：
* Configuration _OPTIONS_:
配置选项：
These are selectable by the user and have names beginning with
"CONFIG_".
是可由用户选择并以“CONFIG_”开头
* Configuration _SETTINGS_:
配置设置
These depend on the hardware etc. and should not be meddled with if
you don't know what you're doing; they have names beginning with
"CFG_".
依赖于硬件，由“CFG_”开头
第一步：
Selection of Processor Architecture and Board Type:
选择处理器架构和板类型：
---------------------------------------------------
For all supported boards there are ready-to-use default
configurations available; just type "make <board_name>_config".
对所有已至此的板都已经有可用的默认配置，只要执行：
make <boare_name>_config
下面是例子
Example: For a TQM823L module type:
cd u-boot
make TQM823L_config
For the Cogent platform, you need to specify the CPU type as well;
e.g. "make cogent_mpc8xx_config". And also configure the cogent
directory according to the instructions in cogent/README.
对于加强型平台还要指定CPU类型，请阅读cogent/READM
第二步
Configuration Options:
配置选项：
----------------------
Configuration depends on the combination of board and CPU type; all
such information is kept in a configuration file
配置依赖于板和CPU，所有配置设置信息保存在：
"include/configs/<board_name>.h".
Example: For a TQM823L module, all configuration settings are in
"include/configs/TQM823L.h".
Many of the options are named exactly as the corresponding Linux
kernel configuration options. The intention is to make it easier to
build a config tool - later.
The following options need to be configured:
以下的选项需要被配置：
这里MPC的配置比较多，如果是SMDK2410的话配置会少很多
- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX.
CPU类型：正确地定义一个种类，比如：CONFIG_MPC85XX
- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS.
板类型：比如：CONFIG_MPC8540ADS
- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined)
Define exactly one, e.g. CONFIG_ATSTK1002
CPU子类
- CPU Module Type: (if CONFIG_COGENT is defined)
Define exactly one of
CONFIG_CMA286_60_OLD
CPU模型
--- FIXME --- not tested yet:
CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P,
CONFIG_CMA287_23, CONFIG_CMA287_50
- Motherboard Type: (if CONFIG_COGENT is defined)
Define exactly one of
CONFIG_CMA101, CONFIG_CMA102
主板
- Motherboard I/O Modules: (if CONFIG_COGENT is defined)
Define one or more of
CONFIG_CMA302
主板I/O模式
-Linux Kernel Interface:
-Linux内核接口
-Linux Kernel Interface:
-Linux内核接口
-Serial Ports:
-串口
-Console Interface:
-控制台接口
-Console Baudrate:
-控制台波特率
-Interrupt driven serial port input:
-中断驱动串口输入
-Console UART Number:
-控制台UART数
-Boot Delay:
-启动延时
-Autoboot Command:
-自动引导命令
- Pre-Boot Commands:
CONFIG_PREBOOT
-Serial Download Echo Mode:
-串口下载回显模式
-Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined)
-Kgdb串口波特率
-Monitor Functions:
-监视函数(很多选项可以选)
-Watchdog:
-看门狗
-U-Boot Version:
-UBOOT版本
-Real-Time Clock:
-实时时钟
-Timestamp Support:
-时间戳支持
-Partition Support:
-分区支持
-IDE Reset method:
-对IDE的支持
- ATAPI Support:
-LBA48 Support
- SCSI Support:
-NETWORK Support (PCI):
-网络支持（PCI）
- NETWORK Support (other):
-USB Support:
-USB支持
-USB Device:
-USB器件
-MMC Support:
-MMC支持
-Journaling Flash filesystem support:
-Flash日志文件系统支持
- Keyboard Support:
-Video support:
-视频支持
- Keyboard Support:
-LCD Support:
-支持LCD
-Splash Screen Support:
-溅射屏幕（程序启动画面）支持
-Gzip compressed BMP image support:
-Gzip压缩BMP图片支持
-Compression support:
-压缩支持
-MII/PHY support:
-媒体独立接口/物理接口收发器支持
-Ethernet address:
-以太网地址
-IP address:
-IP地址
-Server IP address:
-服务器IP地址
-Multicast TFTP Mode:
-多点传送TFTP模式
-Splash Screen Support:
-溅射屏幕（程序启动画面）支持
-Gzip compressed BMP image support:
-Gzip压缩BMP图片支持
-Compression support:
-压缩支持
-MII/PHY support:
-媒体独立接口/物理接口收发器支持
-Ethernet address:
-以太网地址
-IP address:
-IP地址
-Server IP address:
-服务器IP地址
-Multicast TFTP Mode:
-多点传送TFTP模式
- BOOTP Recovery Mode:
CONFIG_BOOTP_RANDOM_DELAY
The following delays are inserted then:
插入的延时时间表
-DHCP Advanced Options:
-DHCP高级选项
- CDP Options:
-Status LED:
-状态LED
-CAN Support:
-CAN总线支持
-I2C Support:
-I2C支持
-SPI Support:
-SPI支持
-FPGA Support:
-FPGA支持
-Configuration Management:
-结构管理
-Splash Screen Support:
-溅射屏幕（程序启动画面）支持
-Gzip compressed BMP image support:
-Gzip压缩BMP图片支持
-Compression support:
-压缩支持
-MII/PHY support:
-媒体独立接口/物理接口收发器支持
-Ethernet address:
-以太网地址
-IP address:
-IP地址
-Server IP address:
-服务器IP地址
-Multicast TFTP Mode:
-多点传送TFTP模式
- BOOTP Recovery Mode:
CONFIG_BOOTP_RANDOM_DELAY
The following delays are inserted then:
插入的延时时间表
-DHCP Advanced Options:
-DHCP高级选项
- CDP Options:
-Status LED:
-状态LED
-CAN Support:
-CAN总线支持
-I2C Support:
-I2C支持
-SPI Support:
-SPI支持
-FPGA Support:
-FPGA支持
-Configuration Management:
-结构管理
- Vendor Parameter Protection:
卖主参数保护
-Protected RAM:
-保护RAM
-Error Recovery:
-错误纠正
-Command Interpreter:
-命令解释
-DataFlash Support:
-数据Flash支持
- SystemACE Support:
-TFTP Fixed UDP Port:
-TFTP固定UDP端口
-Show boot progress:
-显示BOOT过程
Modem Support:
调制解调器支持（很大的一部分）
--------------
Configuration Settings:
配置设置
-----------------------
底层配置选项（与硬件关联）
---------------------------------------------------
- CFG_CACHELINE_SIZE:
Cache Line Size of the CPU.
CPU Cache大小
- CFG_DEFAULT_IMMR:
Default address of the IMMR after system reset.
系统重设后的IMMR默认地址
-Floppy Disk Support:
-软盘支持
-CFG_IMMR:
Physical address of the Internal Memory.
内存物理地址
- CFG_INIT_RAM_ADDR:
Start address of memory area that can be used for
initial data and stack;
用来初始化数据和堆栈的内存起始地址
- CFG_GBL_DATA_OFFSET:
Offset of the initial data structure in the memory
area defined by CFG_INIT_RAM_ADDR.
内存中初始化数据结构的偏移地址
- CFG_SIUMCR: SIU Module Configuration (11-6)
- CFG_SYPCR: System Protection Control (11-9)
系统保护控制
- CFG_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30)
PLL,低功耗，重启控制寄存器
- CFG_SCCR: System Clock and reset Control Register (15-27)
系统时钟和重设寄存器
- CFG_OR_TIMING_SDRAM:
SDRAM timing
SDRAM时钟
- CFG_MAMR_PTA:
periodic timer for refresh
周期刷新时钟
第二步
Building the Software:
编译软件
======================
Monitor Commands - Overview:
监控命令概述
============================
Monitor Commands - Detailed Description:
监控命令—详细说明
========================================
Environment Variables:
环境变量
======================
Command Line Parsing:
命令行分析
=====================
Hush shell:
Hush shell
-----------
General rules:
--------------
Note for Redundant Ethernet Interfaces:
关于以太网接口
=======================================
Image Formats:
映像格式
==============
Linux Support:
==============
Linux HOWTO:
怎么移植Linux
============
Configuring the Linux kernel:
配置Linux内核
-----------------------------
* build a standard "vmlinux" kernel image (in ELF binary format):
编译成标准"vmlinux"内核镜像
convert the kernel into a raw binary image:
转换为原始二进制映像
compress the binary image:
压缩映像
package compressed binary image for U-Boot:
打包
"mkimage"有两种调用方法
Installing a Linux Image:
-------------------------
To downloading a U-Boot image over the serial (console) interface,
you must convert the image to S-Record format:
要从串口下载UBOOT映像，就要将其转换为S-Record格式
More About U-Boot Image Types:
更多UBOOT映像
------------------------------
Standalone HOWTO:
独立程序
=================
Minicom warning:
Minicom警告
================
NetBSD Notes:
=============
Implementation Internals:
=========================