Unknown user в 08:15, 15 октября 2014

2014-10-15T08:15:11Z

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=U-Boot menu concept for AC100=

* Working boot menu example from TI: http://git.denx.de/?p=u-boot.git;a=blob;f=board/ait/cam_enc_4xx/cam_enc_4xx.c;h=644c445693b740936d43e8d1c6e5cfec5451ab03;hb=master
* Uboot menu documentation with example: http://git.denx.de/?p=u-boot.git;a=blob;f=doc/README.menu;h=a8999cab51188c1e12c09e38f2cde8c15d4415e1;hb=master

==Our menu==

* Uboot start with boot delay say 5, if no key pressed auto start or our defined env

* If key pressed show menu

* Menu contain

** Boot from MMC's
*** Choose mmc0 (internal flash) or mmc1 (sdcard) default variants which search for /boot and boot.scr
**** Ability to choose recovery or normal boot

** Boot from USB
*** Same as from MMC's

** Boot by direct raw reading from MMC0
*** Legacy compatibility
*** First option boot recovery, mmc read recovery kernel and initrd
*** Second option normal boot

Run commands example
<pre>
mmc dev 0
mmc read 0x1000000 0x3404 0x12ac
mmc read 0x2200000 0x46b0 0x150
bootz 0x1000000 0x2200000
</pre>

mmc read syntax: mmc read <addr in memory to which store read data> <data start sector on device, multiple to 512 bytes> <sectors to read from start, multiple to 512 bytes>

**** For booting boot.img stuff with mmc read kernel must contain working cmdline or find way parse one from emmc

** Exit to U-Boot console

** Reset device

= Fastboot legacy info =
* Android boot.img offsets
** Похожу эта инфа устарела или я не правильно понимаю, но у boot.img формат по виду другой

[[File:boot_img_offsets.jpg]]

Uboot menu concept - История изменений

Unknown user в 08:15, 15 октября 2014