转自:http://blog.csdn.net/yangzheng_yz/article/details/41038259
在移植uboot的时候,可以在uboot里面添加定义一些自己的环境变量,这些环境变量可以大大提高以后的工作效率,比如我在uboot里面添加如下环境变量:
bbl=sf probe 0;mw.b 82000000 ff 80000;loady0x82000000 uboot_logo.bin;sf erase 0 80000;sf write 82000000 0 80000
然后使用run命令来执行:
hisilicon # run bbl
16384 KiB hi_sfc at 0:0 is now currentdevice ## Ready for binary (ymodem) download to0x82000000 at 115200 bps... CCC Starting ymodem transfer. Press Ctrl+C to cancel. 100% 222 KB 6 KB/s 00:00:36 1 Errors ## Total Size = 0x000379ec = 227820 Bytes Erasing at 0x80000 -- 100% complete. Writing at 0x80000 -- 100% complete.
那么这样就不用每次都输入很长的一串字符串,如:
hisilicon # sf probe 0;mw.b 82000000 ff80000;loady 0x82000000 uboot_logo.bin;sf erase 0 80000;sf write 82000000 080000
那么方法如下:
一、在uboot里面添加环境变量
1、 在u-boot-2010.06/include/configs目录下的xxx.h(xxx是board,如hi3520d.h)里面定义环境变量:
/* Burn bootloader, Linux kernel and rootfscommand */ #define CONFIG_BURNBL "sf probe 0;mw.b 82000000 ff80000;loady 0x82000000 uboot_logo.bin;sf erase 0 80000;sf write 82000000 0 8 0000" #define CONFIG_BURNKERNEL"sf probe 0;mw.b 82000000 ff 480000;loady 82000000 root_cramfs.img;sferase 80000 0x480000;sf write 8200000 0 80000 480000" #define CONFIG_BURN_APP"sf probe 0;mw.b 82000000 ff 0xa00000;loady 82000000 app_jffs2.img;sferase 500000 0xa00000;sf write 82000000 500000 0xa00000" #define CONFIG_BURN_FLASH"sf probe 0;mw.b 82000000 ff 1000000;loady 0x82000000ZMD-PROGRAMMING-FLASH.binl;sf erase 0 1000000;sf writ e 82000000 0 1000000"
2、 然后在u-boot-2010.06/common目录下的evn_common.c里面添加如下代码:
#ifdef CONFIG_BURNBL /* Burn bootloader image to SPIflash*/ "bbl=" CONFIG_BURNBL "\0" #endif #ifdef CONFIG_BURNKERNEL /* Burn kernel image to SPIflash*/ "blx="CONFIG_BURNKERNEL "\0" #endif #ifdef CONFIG_BURN_APP /* Burn APP image to SPIflash*/ "bapp= "CONFIG_BURN_APP "\0" #endif #ifdef CONFIG_BURN_FLASH /* Burn Flash APP image to SPIflash*/ "bfl="CONFIG_BURN_FLASH "\0" #endif
3、 重新编译uboot,并烧录到单板,用printenv或pri可以看到已定义的环境变量:
hisilicon # pr
bootargs=mem=96M console=ttyAMA0,115200root=1f01 rootfstype=cramfsmtdparts=hi_sfc:512K(boot),4M(romfs),10M(app),1536K(config) bootcmd=sf probe 0;sf read 86000000 500000x1B6B2;decjpg;setvobg 0 0x00;stopvo0;startvo 0 4 15;startvo 0 32 15;startgx 0 0x86000000 2560 0 0 1280 1024;sfread 0x84000000 0x80000 0x400000;cramfsload;bootm 0x82000000 bootdelay=1 baudrate=115200 ethaddr=00:00:23:34:45:66 ipaddr=192.168.28.110 jpeg_addr=0x86000000 jpeg_size=0x1b6b2 vobuf=0x86000000 cramfsaddr=0x84000000 cramfsldaddr=0x82000000 serverip=192.168.28.100 netmask=255.255.255.0 bootfile=/boot/hikernel bbl=sf probe 0;mw.b82000000 ff 80000;loady 0x82000000 uboot_logo.bin;sf erase 0 80000;sf write82000000 0 80000 blx=sf probe 0;mw.b82000000 ff 480000;loady 82000000 root_cramfs.img;sf erase 80000 0x480000;sfwrite 82000000 80000 480000 bapp= sf probe 0;mw.b82000000 ff 0xa00000;loady 82000000 app_jffs2.img;sf erase 500000 0xa00000;sfwrite 82000000 500000 0xa00000 bfl=sf probe 0;mw.b82000000 ff 1000000;loady 0x82000000 ZMD-PROGRAMMING-FLASH.binl;sf erase 01000000;sf write 82000000 0 1000000 stdin=serial stdout=serial stderr=serial verify=n ver=U-Boot 2010.06 (Nov 11 2014 - 21:27:51) filesize=379EC Environment size: 1202/65532 bytes
二、 在uboot里面添加run命令
1、 在u-boot-2010.06/common目录下添加一个文件cmd_run.c,代码如下:
/********************************************************************************* * Copyright: (C) 2014 YangZheng<yz2012ww@gmail.com> * All rights reserved. * * Filename: cmd_run.c * Description: This file * * Version: 1.0.0(11/11/2014~) * Author: Yang Zheng<yz2012ww@gmail.com> * ChangeLog: 1, Release initialversion on "11/11/2014 09:05:08 PM" * ********************************************************************************/ #include <common.h> #include <watchdog.h> #include <command.h> #include <image.h> #include <malloc.h> #include <u-boot/zlib.h> #include <bzlib.h> #include <environment.h> #include <lmb.h> #include <linux/ctype.h> #include <asm/byteorder.h> int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char **argv) { if (argc < 2) { cmd_usage(cmdtp); return 1; } if (run_command (getenv (argv[1]), flag)< 0) { return -1; } return 0; } U_BOOT_CMD( boot, 1, 1, do_run "boot default, i.e., run 'bootcmd'", "" );
2、 然后在u-boot-2010.06/include/configs目录的xxx.h(xxx是board,如hi3520d.h)里面添加如下宏定义:
#define CONFIG_CMD_RUN
3、在u-boot-2010.06/common目录的Makefile中添加如下代码:
COBJS-$(CONFIG_CMD_RUN) += cmd_run.o
4、 重新编译uboot,并烧录到单板
三、 运行
hisilicon # run bbl
16384 KiB hi_sfc at 0:0 is now current device ## Ready for binary (ymodem) download to0x82000000 at 115200 bps...
----------------------------------------------------------------------------------
Uboot-201507 am437x平台
uboot_2015.07/common/cli.c----->do_run()
在CONFIG_EXTRA_ENV_SETTINGS宏中添加update_qspi_flash