#!/bin/sh # 参考文章： # 1. MFGTool Emmc mksdcard.sh MFGTool Emmc mksdcard.sh comment # http://jordonwu.github.io/blog/2015/05/14/mfgtool-emmc-mksdcard-dot-sh/ # 2. linux sfdisk partition # http://blog.csdn.net/shell_albert/article/details/8425530 #<!-- partitioning the eMMC: --> #<CMD state="Updater" type="push" body="$ echo 8 > /sys/devices/platform/sdhci-esdhc-imx.3/mmc_host/mmc0/mmc0:0001/boot_config">access user partition and enable boot partion 1 to boot</CMD> #<CMD state="Updater" type="push" body="send" file="mksdcard.sh.tar">Sending partition shell</CMD> #<CMD state="Updater" type="push" body="$ tar xf $FILE "> Partitioning...</CMD> #<CMD state="Updater" type="push" body="$ sh mksdcard.sh /dev/mmcblk0"> Partitioning SD card now...</CMD> # partition size in MB # 这里定义的是启动ROM 10MB BOOT_ROM_SIZE=10 # call sfdisk to create partition table # destroy the partition table # $1: 为命令行第一个传递的参数 # node: /dev/mmcblk0 # 将前导一个1024字节(1KB)大小的分区零0，也就是分区表擦除 node=$1 dd if=/dev/zero of=${node} bs=1024 count=1 # sfdisk reads lines of the form # <start> <size> <id>< bootable> <c,h,s> <c,h,s> # where each line fills one partition descriptor. # # --force: disable all consistency checking # -uS, -uB, -uC, -uM: 以扇面/块/柱面数/MB为单位 显示或形成报告 # SmartFdisk –uM表示以MB为单位生成报告 即： sfdisk --force -um /dev/mmcblk0 <<EOF # # BOOT_ROM_SIZE: 10 # 而分区则是使用sfdisk进行的，空出了uboot和kernel的位置，从起始地址10MB开始的: # (10,,83) 将其10M以后所有空间分成一个区,，此处应该就是mmcblk0p1，其中83是Linux分区标识 # # Uboot和kernel是直接使用dd写入mmcblk0中的: # <!-- burn the uboot: --> # <CMD state="Updater" type="push" body="send" file="files/u-boot.bin">Sending U-Boot</CMD> # <CMD state="Updater" type="push" body="$ dd if=/dev/zero of=/dev/mmcblk0 bs=512 seek=2 count=2000">Clean U-Bootenvironment</CMD> # <CMD state="Updater" type="push" body="$ dd if=$FILE of=/dev/mmcblk0 bs=512 seek=2 skip=2">write U-Boot to sdcard</CMD> # # <!-- burn the kernel: --> # <CMD state="Updater" type="push" body="send" file="files/uImage">Sending kernel uImage</CMD> # <CMD state="Updater" type="push" body="$ dd if=$FILE of=/dev/mmcblk0 bs=1M seek=1 conv=fsync">write kernel image to emmc</CMD> sfdisk --force -uM ${node} << EOF ${BOOT_ROM_SIZE},,83 EOF