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几种Bootloader简介

Posted on 2007-10-06 19:24 谢龙飞 阅读(1888) 评论(2)  编辑 收藏 引用
 Redboot

RedbootRedhat公司随eCos发布的一个BOOT方案,是一个开源项目。

当前Redboot的最新版本是Redboot-2.0.1Redhat公司将会继续支持该项目,其官方发布网址为:http://sources.redhat.com/redboot/

Redboot支持的处理器构架有ARMMIPSMN10300PowerPC Renesas SHxv850x86等,是一个完善的嵌入式系统Boot Loader

Redboot是在ECOS的基础上剥离出来的,继承了ECOS的简洁、轻巧、可灵活配置、稳定可靠等品质优点。它可以使用X-modemY-modem协议经由串口下载,也可以经由以太网口通过BOOTP/DHCP服务获得IP参数,使用TFTP方式下载程序映像文件,常用于调试支持和系统初始化(Flash下载更新和网络启动)。Redboot可以通过串口和以太网口与GDB进行通信,调试应用程序,甚至能中断被GDB运行的应用程序。Redboot为管理FLASH映像,映像下载,Redboot配置以及其他如串口、以太网口提供了一个交互式命令行接口,自动启动后,REDBOOT用来从TFTP服务器或者从Flash下载映像文件加载系统的引导脚本文件保存在Flash上。当前支持单板机的移植版特性有:

-          支持ECOSLinux操作系统引导

-          在线读写Flash

-          支持串行口kermitS-record下载代码

-          监控(minitor)命令集:读写I/O,内存,寄存器、 内存、外设测试功能等

Redboot是标准的嵌入式调试和引导解决方案,支持几乎所有的处理器构架以及大量的外围硬件接口,并且还在不断地完善过程中。

 

l         ARMboot

ARMboot是一个ARM平台的开源固件项目,它特别基于PPCBoot,一个为PowerPC平台上的系统提供类似功能的姊妹项目。鉴于对PPCBoot的严重依赖性,已经与PPCBoot项目合并,新的项目为U-Boot

ARMboot发布的最后版本为ARMboot-1.1.02002ARMboot终止了维护,其发布网址为:http://sourceforge.net/projects/armboot

ARMboot支持的处理器构架有StrongARM ARM720T PXA250 等,是为基于ARM或者StrongARM CPU的嵌入式系统所设计的。

ARMboot的目标是成为通用的、容易使用和移植的引导程序,非常轻便地运用于新的平台上。ARMbootGPL下的ARM固件项目中唯一支持Flash闪存,BOOTPDHCPTFTP网络下载,PCMCLA寻线机等多种类型来引导系统的。特性为:

-          支持多种类型的FLASH

-          允许映像文件经由BOOTPDHCPTFTP从网络传输;

-          支持串行口下载S-record或者binary文件

-          允许内存的显示及修改

-          支持jffs2文件系统等

ArmbootS3C44B0板的移植相对简单,在经过删减完整代码中的一部分后,仅仅需要完成初始化、串口收发数据、启动计数器和FLASH操作等步骤,就可以下载引导uClinux内核完成板上系统的加载。总得来说,ARMboot介于大、小型Boot Loader之间,相对轻便,基本功能完备,缺点是缺乏后续支持。

 

l         U-Boot

U-Boot是由开源项目PPCBoot发展起来的,ARMboot并入了PPCBoot,和其他一些archLoader合称U-Boot20021217日第一个版本U-Boot-0.2.0发布,同时PPCBootARMboot停止维护。

U-Boot自发布以后已更新6,最新版本为U-Boot-1.1.1U-Boot的支持是持续性的。其发布网址为:http://sourceforge.net/projects/u-boot/

U-Boot支持的处理器构架包括PowerPC (MPC5xxMPC8xxMPC82xxMPC7xxMPC74xx4xx) ARM ARM7ARM9StrongARMXscale),MIPS (4Kc5Kc)x86等等, U-BootUniversal Bootloader从名字就可以看出,它是在GPL下资源代码最完整的一个通用Boot Loader

U-Boot提供两种操作模式:启动加载(Boot loading)模式和下载(Downloading)模式,并具有大型Boot Loader的全部功能。主要特性为:

-          SCC/FEC以太网支持 

-          BOOTP/TFTP引导 

-          IPMAC预置功能 

-          在线读写FLASHDOC, IDEIICEEROMRTC

-          支持串行口kermitS-record下载代码 

-          识别二进制、ELF32pImage格式的Image,对Linux引导有特别的支持 

-          监控(minitor)命令集:读写I/O,内存,寄存器、内存、外设测试功能等

-          脚本语言支持(类似BASH脚本)

-          支持WatchDogLCD logo,状态指示功能等 

U-Boot的功能是如此之强大,涵盖了绝大部分处理器构架,提供大量外设驱动,支持多个文件系统,附带调试、脚本、引导等工具,特别支持Linux,为板级移植做了大量的工作。U-Boot1.1.1版本特别包含了对SA110044B0芯片的移植,所以44B0移植主要是针对Board 的移植,包括FLASH、内存配置以及串口波特率等等。U-Boot的完整功能性和后续不断的支持,使系统的升级维护变得十分方便。

 

l         Blob

Blob(Boot Loader Object)是由Jan-Derk Bakker and Erik Mouw发布的,是专门为StrongARM 构架下的LART设计的Boot Loader

Blob的最后版本是blob-2.0.5,其发布网址为:http://www.lart.tudelft.nl/lartware/blob/

Blob支持SA1100LART主板,但用户也可以自行修改移植。

Blob也提供两种工作模式,在启动时处于正常的启动加载模式,但是它会延时 10 秒等待终端用户按下任意键而将 Blob 切换到下载模式。如果在 10 秒内没有用户按键,则 Blob 继续启动 Linux 内核。其基本功能为:

初始化硬件(CPU速度,存储器,中断,RS232串口)

-          引导Linux内核并提供ramdisk

-          LART下载一个内核或者ramdisk

-          FLASH片更新内核或者ramdisk

-          测定存储配置并通知内核

-          给内核提供一个命令行

Blob功能比较齐全,代码较少,比较适合做修改移植,用来引导Liunx,目前大部分S3C44B0板都用Blob修改移植后来加载uClinux 

l         Bios-lt

Bios-lt是专门支持三星(Samsung)公司ARM构架处理器S3C4510BLoader,可以设置CPU/ROM/SDRAM/EXTIO,管理并烧写FLASH,装载引导uClinux内核。这是国内工程师申请GNU通用公共许可发布的。                  

Bios-lt的最新版本是Bios-lt-0.74,另外还提供了S3C4510B的一些外围驱动,其发布网址为:http://sourceforge.net/projects/bios-lt

l         Bootldr

Bootldr是康柏(Compaq)公司发布的,类似于compaq iPAQ Pocket PC,支持SA1100芯片。它被推荐用来引导Llinux,支持串口Y-modem协议以及jffs文件系统。                                          

Bootldr的最后版本为Bootldr-2.19,其发布网址为: http://www.wearablegroup.org/software/bootldr/

 ViVi

        vivi是什么?

        vivi是由mizi公司设计为ARM处理器系列设计的一个bootloader,因为vivi目前只支持使用串口和主机通信,所以您必须使用一条串口电缆来连接目标板和主机。

       它有如下作用:

       1)、 把内核(kernel)从flash复制到RAM,然后启动它

       2)、 初始化硬件

       3)、 下载程序并写入flash(一般通过串口或者网口先把内核下载到RAM中,然后写入到flash)

       4)、 检测目标板(bootloader会有一些简单的代码用以测试目标板硬件的好坏)

       vivi的使用方法

       摘录自vivi的guide.txt,稍作修改。

Getting started with vivi

Janghoon Lyu (nandy@mizi.com)

This is a short introduction about the vivi.

Revision History

Revision v0.1 2002-10-21 Revised by: jl

Initial public release. very very short descriptions. (with foolish sentences -_-;;)

------------------------------------------------------------------------

  

1. Introduction.

1.1. Definitions.

1.2. vivi的目录结构及文件.

1.2.1 vivi的目录树.

1.2.2 vivi的文件.

2. vivi 的编译.

2.1. Pre-Requirements.

2.2. Straight-forward compilation.

2.3. SA-1110-Based machines with the NOR flash.

2.4. S3C2410-Based machines with the NAND flash.

3. vivi的使用.

3.1. Interface between an user and the vivi.

3.2. Built-in user commands.

3.2.1. load command.

3.2.2. part command.

3.2.3. param command.

3.2.4. boot command.

3.2.5. flash command.

------------------------------------------------------------------------

1. Introduction

This document explains to you:

 

1) compiling the vivi

 

2) interface an user and the vivi

 

3) avaliable user commands

1.1. Definitions

vivi

 

The vivi is one of arm boot loaders.

 

Autoboot mode

 

The vivi has two modes. one of these is autoboot mode. This is a default mode. In this mode, The vivi automatically boot-up the linux kernel when a delay time is expired.

 

Prompt mode

 

One of vivi's modes is prompt mode. In this mode, An user is able to command to the vivi doing something.

 

Host platform

 

Generally, an engineer develop the software on the powerful destktop computer (not on the embedded machines). This descktop called host platform.

 

Target platform

 

Target platform means developemnt boards or embedded machines.

1.2. vivi的目录结构及文件

1.2.1 vivi的目录树

E:\S3C2410_VIVI_R1.1

├───Documentation

   └───html

├───arch

   ├───def-configs

   └───s3c2410

├───drivers

   ├───mtd

      ├───maps

      ├───nand

      └───nor

  └───serial

├───include

   ├───mtd

   ├───proc

   └───platform

├───init

├───lib

   └───priv_data

├───scripts

   └───lxdialog

└───util

1.2.2 vivi的文件

Directory of E:\s3c2410_vivi_r1.1

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          Documentation

2006-08-30  14:10    <DIR>          arch

2006-08-30 14:10    <DIR>          drivers

2006-08-30 14:10    <DIR>          include

2006-08-30 14:10    <DIR>          init

2006-08-30 14:10    <DIR>          lib

2006-08-30 14:10    <DIR>          scripts

2006-08-30 14:10    <DIR>          util

2004-05-07 08:48            18,008 COPYING

2004-05-07 08:48             5,540 Makefile

2004-05-07 08:48             4,348 Rules.make

               3 File(s)      27,896 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\Documentation

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          html

2004-05-07 08:48                98 .cvsignore

2004-05-07 08:48             7,002 CHANGELOG

2004-05-07 08:48             8,537 Configure.help

2004-05-07 08:48             7,979 Configure.help.en

2004-05-07 08:48             1,301 README

2004-05-07 08:48             4,373 booting.ARM

2004-05-07 08:48               682 compile.txt

2004-05-07 08:48             8,965 guide.txt

2004-05-07 08:48             1,353 optoions.txt

2004-05-07 08:48             1,490 vivi_priv_data.txt

              10 File(s)         41,780 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\Documentation\html

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48            18,232 guide.html

               1 File(s)         18,232 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\arch

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          def-configs

2004-05-07 08:48             2,282 Makefile

2004-05-07 08:48             3,435 config.in

2004-05-07 08:48             2,070 defconfig

2004-05-07 08:48               137 vivi.lds.in

2006-08-30 14:10    <DIR>          s3c2410

               4 File(s)          7,924 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\arch\def-configs

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48             2,070 smdk2410

               1 File(s)          2,070 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\arch\s3c2410

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48               379 Makefile

2004-05-07 08:48            16,566 head.S

2004-05-07 08:48             4,858 mmu.c

2004-05-07 08:48             1,597 nand_read.c

2004-05-07 08:48             9,077 proc.c

2004-05-07 08:48             2,497 smdk.c

2004-05-07 08:48             3,801 smdk2410_test.c

2004-05-07 08:48             9,069 test.c

               8 File(s)         47,844 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\drivers

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          mtd

2004-05-07 08:48               237 Makefile

2006-08-30 14:10    <DIR>          serial

               1 File(s)            237 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\drivers\mtd

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          maps

2006-08-30 14:10    <DIR>          nand

2004-05-07 08:48               506 Config.in

2004-05-07 08:48               284 Makefile

2004-05-07 08:48            12,856 mtdcore.c

2006-08-30 14:10    <DIR>          nor

               3 File(s)         13,646 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\drivers\mtd\maps

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48               553 Config.in

2004-05-07 08:48               340 Makefile

2004-05-07 08:48             2,683 pxa250_flash.c

2004-05-07 08:48             2,701 s3c2400_flash.c

2004-05-07 08:48             7,570 s3c2410_flash.c

2004-05-07 08:48             2,632 sa1100_flash.c

               6 File(s)         16,479 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\drivers\mtd\nand

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48               630 Config.in

2004-05-07 08:48               278 Makefile

2004-05-07 08:48            10,376 bon.c

2004-05-07 08:48             5,252 nand_ecc.c

2004-05-07 08:48            26,771 smc_core.c

               5 File(s)         43,307 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\drivers\mtd\nor

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48             2,000 Config.in

2004-05-07 08:48               265 Makefile

2004-05-07 08:48            29,770 amd_flash.c

2004-05-07 08:48            25,191 cfi_cmdset_0001.c

2004-05-07 08:48             9,777 cfi_probe.c

2004-05-07 08:48             1,007 chipreg.c

2004-05-07 08:48             6,781 gen_probe.c

               7 File(s)         74,791 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\drivers\serial

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48               955 Config.in

2004-05-07 08:48               324 Makefile

2004-05-07 08:48             1,174 getcmd.c

2004-05-07 08:48               647 getcmd.h

2004-05-07 08:48             6,878 getcmd_ext.c

2004-05-07 08:48             1,530 serial_core.c

2004-05-07 08:48             1,264 term.c

2004-05-07 08:48             4,895 xmodem.c

2004-05-07 08:48             7,204 ymodem.c

               9 File(s)         24,871 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\include

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          mtd

2006-08-30 14:10    <DIR>          proc

2004-05-07 08:48               691 architecture.h

2004-05-07 08:48             2,835 bitfield.h

2004-05-07 08:48               764 boot_kernel.h

2004-05-07 08:48             3,122 cap.h

2004-05-07 08:48               912 command.h

2004-05-07 08:48               257 compile.h

2004-05-07 08:48               196 config.h

2004-05-07 08:48               106 ctype.h

2004-05-07 08:48               106 errno.h

2004-05-07 08:48               105 flash.h

2004-05-07 08:48               112 getcmd.h

2004-05-07 08:48               694 hardware.h

2004-05-07 08:48               229 heap.h

2004-05-07 08:48               385 io.h

2004-05-07 08:48               441 linkage.h

2004-05-07 08:48             1,087 machine.h

2004-05-07 08:48             3,938 md5.h

2004-05-07 08:48               427 memory.h

2004-05-07 08:48               796 mmu.h

2004-05-07 08:48               114 printk.h

2004-05-07 08:48             1,657 priv_data.h

2004-05-07 08:48               312 processor.h

2004-05-07 08:48            24,247 pxa250.h

2004-05-07 08:48               357 reset_handle.h

2004-05-07 08:48            16,876 s3c2400.h

2004-05-07 08:48            17,357 s3c2410.h

2004-05-07 08:48            17,979 sa1100.h

2004-05-07 08:48               438 serial.h

2004-05-07 08:48               104 setup.h

2004-05-07 08:48             1,130 sizes.h

2004-05-07 08:48               198 time.h

2004-05-07 08:48               125 types.h

2004-05-07 08:48             1,296 vivi.h

2004-05-07 08:48               273 vivi_lib.h

2004-05-07 08:48               328 vivi_string.h

2004-05-07 08:48               115 xmodem.h

2004-05-07 08:48             2,690 ymodem.h

2006-08-30 14:10    <DIR>          platform

              37 File(s)        102,799 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\include\mtd

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48             2,918 amd_flash.h

2004-05-07 08:48               201 bonfs.h

2004-05-07 08:48            11,521 cfi.h

2004-05-07 08:48             1,277 flashchip.h

2004-05-07 08:48               505 gen_probe.h

2004-05-07 08:48             2,632 map.h

2004-05-07 08:48             5,997 mtd.h

2004-05-07 08:48             6,572 nand.h

2004-05-07 08:48               782 nand_ecc.h

2004-05-07 08:48             3,216 nand_ids.h

              10 File(s)         35,621 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\include\proc

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48             1,773 proc_pxa250.h

2004-05-07 08:48             1,301 proc_s3c2400.h

2004-05-07 08:48             1,803 proc_s3c2410.h

2004-05-07 08:48             1,911 proc_sa1100.h

               4 File(s)          6,788 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\include\platform

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48             3,654 s3c2410_gen_memmap.h

2004-05-07 08:48             4,417 smdk2410.h

               2 File(s)          8,071 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\init

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48               263 version.c

2004-05-07 08:48             3,021 main.c

               2 File(s)          3,284 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\lib

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          priv_data

2004-05-07 08:48               577 Config_cmd.in

2004-05-07 08:48               350 Makefile

2004-05-07 08:48            10,342 boot_kernel.c

2004-05-07 08:48             8,103 command.c

2004-05-07 08:48             1,321 ctype.c

2004-05-07 08:48            3,332 exec.c

2004-05-07 08:48             2,694 heap.c

2004-05-07 08:48             4,160 load_file.c

2004-05-07 08:48            13,371 md5.c

2004-05-07 08:48            11,374 memory.c

2004-05-07 08:48            11,221 memtst.c

2004-05-07 08:48             4,530 misc.c

2004-05-07 08:48             9,044 printk.c

2004-05-07 08:48             1,218 reset_handle.c

2004-05-07 08:48             3,618 string.c

2004-05-07 08:48             2,267 time.c

              16 File(s)         87,522 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\lib\priv_data

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48               419 Config.in

2004-05-07 08:48                87 Makefile

2004-05-07 08:48             7,612 mtdpart.c

2004-05-07 08:48             6,685 param.c

2004-05-07 08:48             5,853 rw.c

               5 File(s)         20,656 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\scripts

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2006-08-30 14:10    <DIR>          lxdialog

2004-05-07 08:48            12,287 Configure

2004-05-07 08:48            24,422 Menuconfig

2004-05-07 08:48             7,485 README.Menuconfig

               3 File(s)         44,194 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\scripts\lxdialog

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48               234 BIG.FAT.WARNING

2004-05-07 08:48             1,130 Makefile

2004-05-07 08:48             9,765 checklist.c

2004-05-07 08:48             5,384 colors.h

2004-05-07 08:48             5,936 dialog.h

2004-05-07 08:48             6,179 inputbox.c

2004-05-07 08:48             6,023 lxdialog.c

2004-05-07 08:48            12,844 menubox.c

2004-05-07 08:48             2,529 msgbox.c

2004-05-07 08:48            15,584 textbox.c

2004-05-07 08:48             9,927 util.c

2004-05-07 08:48             3,067 yesno.c

              12 File(s)         78,602 bytes

 

 Directory of E:\s3c2410_vivi_r1.1\util

 

2006-08-30 14:10    <DIR>          .

2006-08-30 14:10    <DIR>          ..

2004-05-07 08:48            10,711 imagewrite.c

2004-05-07 08:48               113 README

2004-05-07 08:48             3,186 ecc.c

2004-05-07 08:48            28,012 imagewrite

4 File(s)         42,022 bytes

2. vivi 的编译

This section describes how to compile the vivi.

2.1. Pre-Requirements

Here is a list of the minimum levels of software necessary to compile the vivi.

 

* Gnu C 2.95.3

 

* Gnu make 3.79.1

 

* binutils 2.11.2

 

And then, your host platform are installed these tools.

 

* You have a cross-compiler and tool-chains.

 

* You have a Baurne-Again shell. (/bin/bash)

 

* You have a ncurses library.

2.2. Straight-forward compilation

The compiliation(configuration) environment of the vivi is simlilar to the environment of the linux kernel. So, you can do make distclean, make clean, make oldconfig , make menuconfig, and make config. General compiling sequence sequence is:

 

1) make distclean

 

2) make menuconfig

 

3) make

 

Note that If you change configurations, run make clean and make. Next two sections describes compilation of two examples.

2.3. SA-1110-Based machines with the NOR flash

I will take an example about the vivi compliation. I assumed that a target platform's core block is composed like this:

 

* CPU: SA-1110 processor

 

* ROM: 32MB Intel Strata Flash (32-bit wide)

 

* RAM: 32MB DRAM

 

These features make sense to you. Many platforms I have met is designed core block like above. For instance, KINGS, GILL, and ENDA's core block is designed like this. Therefore, you refer to vivi/arch/def-configs/kings, vivi/arch/def-configs/gill, and vivi/arch/def-configs/enda

 

If you want to compile vivi for KINGS(i.e. a configuration of a target board, alredy exist in the vivi/arch/def-cofnigs), just do like this:

 

# make kings

 

Other machines can complie same ways.

2.4. S3C2410-Based machines with the NAND flash

Here, I will take an example about a S3C2410-Based machine. The SMDK-2410 (a development board by SAMSUNG) is a S3C2410-Based machine.The core block of SMDK-2410 is composed like this:

 

* CPU: S3C2410

* ROM: 64MB SMC (NAND Flash)

* RAM: 64MB DRAM

 

A configuration for SMDK-2410 will be found atvivi/arch/def-configs/smdk2410. To compile for SMDK-2410, do like this(As I described above):

 

# make smdk2410

3. vivi的使用

3.1. Interface between an user and the vivi

The vivi uses the serical communication for user interface. Therefore, to connect the vivi, you

1) connect a serial cable between host platform and target platform.

2) already have a serial communication program like the minicom.

3) properly make the vivi binary to support a UART port when you configure the vivi.

 

If all of above is ok, you can see messages on the screen printed by the vivi. For example, below messages catched from the SMDK-2410

 

VIVI version 0.1.4 (nandy@nandy.mizi.com) (gcc version 2.95.2 20000516 (release)

 

[Rebel.com]) #0.1.4 10岿 16 16:19:11 KST 2002

 

MMU table base address = 0x33DFC000

 

Succeed memory mapping.

NAND device: Manufacture ID: 0xec, Chip ID: 0x75 (Samsung KM29U256T)

Found saved vivi parameters.

 

Press Return to start the LINUX now, any other key for vivi

 

See the last line on the screen. (As I mentioned section 1.1) the vivi has two mode: an autoboot mode and a prompt mode. The vivi wait for a key input. If an user want to enter the prompt mode, press andy key (except Enter key). And then you can see the "vivi>" prompt. Otherwise, the vivi try boot the linux kernel after waiting a few seconds or minutes.

3.2. Built-in user commands

This is not full-described built-in user comamnd. But following commands is enough to use the vivi (as far as I know).

3.2.1. load command

A load command is loading binaries to the flash or the ram.

 

Usage:

 

load [ | ]

 

This argument is where to load. Availabe values are *flash* and *ram*.

 

[ ] or [ ]

 

This arguement determines location where to load a binary. If you want to use pre-defined mtd partiton informations, just type a partition name. Otherwise you specify an address and a size.

 

This arguement determines the file transfer protocol. I shy that the vivi only supprot xmodem curruntly. So, Available value is "x".

 

For exampe, you load zImage to flash memroy.

 

vivi > load flash kernel x

 

or you specify an address and a size.

 

vivi > load flash 0x80000 0xc0000 x

3.2.2. part command

The vivi has mtd partiton informations for the vivi. This informatin not related to mtd partition informations of mtd device drivers. The vivi uses partition informations when load a binary, boot the linux kernel, erase flash memroy, etc...

 

Avalilable commands are:

 

Display mtd partition informations.

 

part show

 

Add a new mtd partition.

 

part add

 

is name of a new mtd partiton.

is offset in the mtd device.

is a size of a mtd parition.

is flags of a mtd parition. Available valuse are JFFS2, LOCKED, and BONFS.

 

Delete a mtd partiton.

 

part del

 

Reset mtd partitions to default values.

 

part reset

 

Save paramter valuse and mtd parition informations to flash permanently.

 

part save

3.2.3. param command

The vivi has some parameter values. For example, the "boot_delay" paramter determines how long wait keystroke when the vivi is in the autoboot mode. I'm sorry that this feature is in progress. So all listed parameter is not available.

 

Here, I give several tips for you.

 

If you change the "linxu command line",

 

vivi> param set linux_cmd_line "you wish.."

 

If you want to see paramters,

 

vivi> param show

 

If you want to wait a long time when recevie file via xmodem,

 

vivi> param set xmodem_initial_timeout 3000000

 

If you want to boot imediately when a hardware reset,

 

vivi> param set boot_delay 100000

3.2.4. boot command

A boot command is boot the linux kernel which is stored in the flashmemroy or ram.

 

Usage:

 

boot [ | ]

 

This argument is where to store the linux kernel image. Availabe values are ram, nor and smc.

 

[ ] or [ ]

 

This arguement determines location where to store the linux kernel. If you want to use pre-defined mtd partiton information, just type a partition name. Otherwise you shuld specify an address and a size.

 

Note that all argument is optional. If you omit all argument (just type boot), all arguments is parsing from pre-defined mtd parititon information called "kernel" For example,

 

vivi> boot

 

the vivi read the linux kernel binary from the "kernel" mtd parititons.

 

vivi> boot nor 0x80000

 

the vivi read the linux kernel binary form the nor flash memory. The offset is 0x80000 and the size is default value (0xc0000). Ocassionally, you want to test the kernel on the ram (not store kernel to flash). you can do it on the vivi On the SA-1110 based machine,

 

vivi> load ram 0xc0008000 x

 

vivi> boot ram

 

On the S3C2410 based machine,

 

vivi> load ram 0x30008000 x

 

vivi> boot ram

 

On the PXA-240 based machine,

 

vivi> load ram 0xA0008000 x

 

vivi> boot ram

 

the vivi boot the linux kernel from the ram.

3.2.5. flash command

A flash comamnd manages the flash memory. If you want to erase flash memory,

 

flash erase [ | ] 
 

Feedback

# re: 几种Bootloader简介  回复  更多评论   

2008-06-21 00:49 by 地磅解码器
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