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最近在搞高通的IPQ806X方案，路由网关和无线一体化设备。ARM-V7双核CPU，NAT和BRIDGE的内外网转发性能都只有30多K，为了优化，要改内核驱动。
首先面临的是OPENWRT升级问题，下面总结一下方法：一、在UBOOT下升级
1、设置本地IP和TFT服务器IP set autostart no && set ipaddr 10.0.2.151 && set serverip 10.0.2.153 2、加载 tftpboot 0x42000000 ipq806x-nor-apps.img3、烧录
sf probe && imageaddr=0x42000000 &&source 0x42000000:script二、在linux系统下升级
方法有: 1.dd 2.sysupgrade这两种方法都是需要先将文件tftp到系统中。
例子1：
升级UBOOT dd if=openwrt-ipq806x-u-boot.mbn of=/dev/mtdblock8例子2：
升级内核和文件系统 sysupgrade -i -v ipq806x-nor-apps.img 输出示例： root@OpenWrt:/tmp# sysupgrade -i -v ipq806x-nor-apps.img Warning: optional section “sbl1” missing from “ipq806x-nor-apps.img”. Continue… Warning: optional section “sbl2” missing from “ipq806x-nor-apps.img”. Continue… Warning: optional section “sbl3” missing from “ipq806x-nor-apps.img”. Continue… Warning: optional section “u-boot” missing from “ipq806x-nor-apps.img”. Continue… Warning: optional section “ddr-ap148” missing from “ipq806x-nor-apps.img”. Continue… Warning: optional section “ssd” missing from “ipq806x-nor-apps.img”. Continue… Warning: optional section “tz” missing from “ipq806x-nor-apps.img”. Continue… Warning: optional section “rpm” missing from “ipq806x-nor-apps.img”. Continue… Returning 0 from is_authentication_check_enabled Keep config files over reflash (Y/n): y Edit config file list (y/N): n Saving config files… etc/sysctl.conf etc/slp.spi etc/slp.reg etc/slp.conf etc/shells etc/rc.local etc/profile etc/passwd etc/inittab etc/hosts etc/group etc/fw_env.config etc/firewall.user etc/dropbear/dropbear_rsa_host_key etc/dropbear/dropbear_dss_host_key etc/cups/printers.conf etc/cups/client.conf etc/config/upnpd etc/config/uhttpd etc/config/ucitrack etc/config/ubootenv etc/config/thermal etc/config/system etc/config/samba etc/config/rstp etc/config/ripd etc/config/radvd etc/config/pure-ftpd etc/config/pppoe etc/config/nss etc/config/network etc/config/mcproxy etc/config/macsec etc/config/luci etc/config/firewall etc/config/dropbear etc/config/dhcp6c etc/config/dhcp etc/config/ddns etc/config/alljoyn Sending TERM to remaining processes … syslogd klogd hotplug2 ubusd netifd mcproxy cupsd slpd zebra Jan 5 05:18:49 watchquagga[2535]: zebra state -F watchquagga Jan 5 05:18:49 watchquagga[2535]: Terminating on signal uhttpd dbus-daemon dnsmasq smbd nmbd xl2tpd avahi-daemon alljoyn-daemon rngd ntpd thermald Sending KILL to remaining processes … uhttpd Switching to ramdisk… Performing system upgrade… Section script ignored ash: can’t create /sys/devices/platform/msm_nand/boot_layout: nonexistent directory find: /sys/block/mmcblk*/: No such file or directory Unlocking kernel … Erasing kernel …Writing from to kernel … [w]1845248+0 records in
1845248+0 records outFlashed hlos-894c257106b4e407230bdc07bedb9c44ce088f40
ash: can’t create /sys/devices/platform/msm_nand/boot_layout: nonexistent directory find: /sys/block/mmcblk*/: No such file or directory Unlocking rootfs … Erasing rootfs …Writing from to rootfs … [w]16685056+0 records in
16685056+0 records outFlashed fs-73be11f50c9325ae68c43b1ae01663c947d14314
[ 735.875945] refresh_rootfs_split: updating partition “rootfs_data”, offset: 0x1510000 (0x810000) ash: can’t create /sys/devices/platform/msm_nand/boot_layout: nonexistent directory Refreshing partitions Refreshing mtd partition rootfs … find: /sys/block/mmcblk*/: No such file or directory Unlocking rootfs_data … Erasing rootfs_data … Appending /tmp/sysupgrade.tgz to jffs2 partition rootfs_data Upgrade completed Reboot (Y/n): y Rebooting system… [ 839.041330] Restarting system. [ 839.043423] Going down for restart now转载地址：http://saypi.baihongyu.com/