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[u-boot@MINI2440]# mmc init mmc: Probing for SDHC ... mmc: SD 2.0 or later card found trying to detect SD Card... Manufacturer: 0x00, OEM "Product name: " ", revision 0.0 Serial number: 7864775 Manufacturing date: 11/2006 CRC: 0x4f, b0 = 1 READ_BL_LEN=6, C_SIZE_MULT=7, C_SIZE=4095 size = 0 SD Card detected RCA: 0x2 type: SD mmc1 is available [u-boot@MINI2440]# fatload mmc 1 0x30008000 u-boot.bin reading u-boot.bin
256220 bytes read [u-boot@MINI2440]# nand erase 0 0x40000
NAND erase: device 0 offset 0x0, size 0x40000 Erasing at 0x2000000000004 -- 0% complete. OK [u-boot@MINI2440]# nand write 0x30008000 0 0x40000
NAND write: device 0 offset 0x0, size 0x40000 Writing at 0x2000000020000 -- 100% is complete. 262144 bytes written: OK |
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[u-boot@MINI2440]# usb start (Re)start USB... USB: scanning bus for devices... 2 USB Device(s) found scanning bus for storage devices... 1 Storage Device(s) found [u-boot@MINI2440]# usb storage Device 0: Vendor: Kingston Rev: PMAP Prod: DT 101 II Type: Removable Hard Disk Capacity: 3875.0 MB = 3.7 GB (7936000 x 512) [u-boot@MINI2440]# usb part 0 print_part of 0
Partition Map for USB device 0 -- Partition Type: DOS
Partition Start Sector Num Sectors Type 4 63 7935937 c [u-boot@MINI2440]# fatload usb 0:4 0x30008000 u-boot.bin reading u-boot.bin ........................
256220 bytes read [u-boot@MINI2440]# protect off all Un-Protect Flash Bank # 1 [u-boot@MINI2440]# erase 0x0 0x3ffff Erasing sector 0 ... ok. Erasing sector 1 ... ok. Erasing sector 2 ... ok. Erasing sector 3 ... ok. Erased 4 sectors [u-boot@MINI2440]# cp.b 0x30008000 0x0 0x3ffff Copy to Flash... done |
3) 通过TFTP服务烧入Nand Flash：
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[u-boot@MINI2440]# tftpboot 30008000 192.168.1.100:u-boot.bin dm9000 i/o: 0x20000300, id: 0x90000a46 DM9000: running in 16 bit mode MAC: 08:08:11:18:12:27 operating at 100M full duplex mode Using dm9000 device TFTP from server 192.168.1.100; our IP address is 192.168.1.101 Filename 'u-boot.bin'. Load address: 0x30008000 Loading: T ################## done Bytes transferred = 256220 (3e8dc hex) [u-boot@MINI2440]# nand erase 0 0x40000 NAND erase: device 0 offset 0x0, size 0x40000 Erasing at 0x2000000000004 -- 0% complete. OK [u-boot@MINI2440]# nand write 0x30008000 0 0x40000
NAND write: device 0 offset 0x0, size 0x40000 Writing at 0x2000000020000 -- 100% is complete. 262144 bytes written: OK |
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[u-boot@MINI2440]# nfs 30008000 192.168.1.100:/home/tekkaman/development/share/u-boot.bin dm9000 i/o: 0x20000300, id: 0x90000a46 DM9000: running in 16 bit mode MAC: 08:08:11:18:12:27 operating at 100M full duplex mode Using dm9000 device File transfer via NFS from server 192.168.1.100; our IP address is 192.168.1.101 Filename '/home/tekkaman/development/share/u-boot.bin'. Load address: 0x30008000 Loading: ################################################### done Bytes transferred = 256220 (3e8dc hex) [u-boot@MINI2440]# nand erase 0 0x40000 NAND erase: device 0 offset 0x0, size 0x40000 Erasing at 0x2000000000004 -- 0% complete. OK [u-boot@MINI2440]# nand write 0x30008000 0 0x40000
NAND write: device 0 offset 0x0, size 0x40000 Writing at 0x2000000020000 -- 100% is complete. 262144 bytes written: OK |
内核引导
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为什么要用U-boot的mkimage工具处理内核映像zImage？ 因为在用bootm命令引导内核的时候，bootm需要读取一个64字节的文件头，来获取这个内核映象所针对的CPU体系结构、OS、加载到内存中的位置、在内存中入口点的位置以及映象名等等信息。这样bootm才能为OS设置好启动环境，并跳入内核映象的入口点。而mkimage就是添加这个文件头的专用工具。具体的实现请看U-boot中bootm的源码和mkimage的源码。 |
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mkimage工具的使用：
参数说明： -A指定CPU的体系结构，可用值有：alpha、arm 、x86、ia64、mips、mips64、ppc 、s390、sh、sparc 、sparc64、m68k等 -O指定操作系统类型，可用值有：openbsd、netbsd、freebsd、4_4bsd、linux、svr4、esix、solaris、irix、sco、dell、ncr、lynxos、vxworks、psos、qnx、u-boot、rtems、artos -T指定映象类型，可用值有：standalone、kernel、ramdisk、multi、firmware、script、filesystem -C指定映象压缩方式，可用值有： none 不压缩(一般使用这个，因为zImage是已经被bzip2压缩过的自解压内核) gzip 用gzip的压缩方式 bzip2 用bzip2的压缩方式 -a指定映象在内存中的加载地址，映象下载到内存中时，要按照用mkimage制作映象时，这个参数所指定的地址值来下载 -e 指定映象运行的入口点地址，这个地址就是-a参数指定的值加上0x40（因为前面有个mkimage添加的0x40个字节的头） -n 指定映象名 -d指定制作映象的源文件
以下是制作内核映像的命令示例： mkimage -n 'tekkaman' -A arm -O linux -T kernel -C none -a 0x30008000 -e 0x30008040 -d zImage zImage.img |
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[u-boot@MINI2440]# mmc init mmc: Probing for SDHC ... mmc: SD 2.0 or later card found trying to detect SD Card... Manufacturer: 0x00, OEM "Product name: " ", revision 0.0 Serial number: 7864775 Manufacturing date: 11/2006 CRC: 0x4f, b0 = 1 READ_BL_LEN=6, C_SIZE_MULT=7, C_SIZE=4095 size = 0 SD Card detected RCA: 0x2 type: SD mmc1 is available [u-boot@MINI2440]# fatload mmc 1 30008000 zImage.img reading zImage.img
2277540 bytes read [u-boot@MINI2440]# bootm 30008000 ## Booting kernel from Legacy Image at 30008000 ... Image Name: tekkaman Created: 2010-03-29 12:59:51 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2277476 Bytes = 2.2 MB Load Address: 30008000 Entry Point: 30008040 Verifying Checksum ... OK XIP Kernel Image ... OK OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel. Linux version 2.6.33.1 (tekkaman@MAGI-Linux) (gcc version 4.3.2 (crosstool-NG-1.6.1-tekkaman) ) #5 Mon Mar 29 20:58:50 CST 2010 CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177 CPU: VIVT data cache, VIVT instruction cache Machine: MINI2440 （略） |
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[u-boot@MINI2440]# tftpboot 0x30008000 192.168.1.100:zImage.img dm9000 i/o: 0x20000300, id: 0x90000a46 DM9000: running in 16 bit mode MAC: 08:08:11:18:12:27 operating at 100M full duplex mode Using dm9000 device TFTP from server 192.168.1.100; our IP address is 192.168.1.101 Filename 'zImage.img'. Load address: 0x30008000 Loading: T ################################################################# ################################################################# ########################## done Bytes transferred = 2277540 (22c0a4 hex) [u-boot@MINI2440]# bootm 30008000 ## Booting kernel from Legacy Image at 30008000 ... Image Name: tekkaman Created: 2010-03-29 12:59:51 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2277476 Bytes = 2.2 MB Load Address: 30008000 Entry Point: 30008040 Verifying Checksum ... OK XIP Kernel Image ... OK OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel. Linux version 2.6.33.1 (tekkaman@MAGI-Linux) (gcc version 4.3.2 (crosstool-NG-1.6.1-tekkaman) ) #5 Mon Mar 29 20:58:50 CST 2010 CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177 CPU: VIVT data cache, VIVT instruction cache Machine: MINI2440 （略） |
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[u-boot@MINI2440]# nfs 30008000 192.168.1.100:/home/tekkaman/development/share/zImage.img dm9000 i/o: 0x20000300, id: 0x90000a46 DM9000: running in 16 bit mode MAC: 08:08:11:18:12:27 operating at 100M full duplex mode Using dm9000 device File transfer via NFS from server 192.168.1.100; our IP address is 192.168.1.101 Filename '/home/tekkaman/development/share/zImage.img'. Load address: 0x30008000 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ####################################################### done Bytes transferred = 2277540 (22c0a4 hex) [u-boot@MINI2440]# bootm 30008000 ## Booting kernel from Legacy Image at 30008000 ... Image Name: tekkaman Created: 2010-03-29 12:59:51 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2277476 Bytes = 2.2 MB Load Address: 30008000 Entry Point: 30008040 Verifying Checksum ... OK XIP Kernel Image ... OK OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel. Linux version 2.6.33.1 (tekkaman@MAGI-Linux) (gcc version 4.3.2 (crosstool-NG-1.6.1-tekkaman) ) #5 Mon Mar 29 20:58:50 CST 2010 CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177 CPU: VIVT data cache, VIVT instruction cache Machine: MINI2440 （略） |
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[u-boot@MINI2440]# nfs 30008000 192.168.1.100:/home/tekkaman/development/share/zImage.img dm9000 i/o: 0x20000300, id: 0x90000a46 DM9000: running in 16 bit mode MAC: 08:08:11:18:12:27 operating at 100M full duplex mode Using dm9000 device File transfer via NFS from server 192.168.1.100; our IP address is 192.168.1.101 Filename '/home/tekkaman/development/share/zImage.img'. Load address: 0x30008000 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ####################################################### done Bytes transferred = 2277540 (22c0a4 hex) [u-boot@MINI2440]# nand erase 0x80000 0x300000
NAND erase: device 0 offset 0x80000, size 0x300000 Erasing at 0x36000001800000 -- 0% complete. OK [u-boot@MINI2440]# nand write 30008000 0x80000 300000
NAND write: device 0 offset 0x80000, size 0x300000
Writing at 0x36000000020000 -- 100% is complete. 3145728 bytes written: OK
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[u-boot@MINI2440]# nand read 30008000 0x80000 300000
NAND read: device 0 offset 0x80000, size 0x300000 3145728 bytes read: OK [u-boot@MINI2440]# bootm 30008000 ## Booting kernel from Legacy Image at 30008000 ... Image Name: tekkaman Created: 2010-03-29 12:59:51 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2277476 Bytes = 2.2 MB Load Address: 30008000 Entry Point: 30008040 Verifying Checksum ... OK XIP Kernel Image ... OK OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel. Linux version 2.6.33.1 (tekkaman@MAGI-Linux) (gcc version 4.3.2 (crosstool-NG-1.6.1-tekkaman) ) #5 Mon Mar 29 20:58:50 CST 2010 CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177 CPU: VIVT data cache, VIVT instruction cache Machine: MINI2440 （略） |