android - U-boot: Dual Boot + Dummy Kernel + Modified Splash Image -


i want integrate dual boot feature u-boot. during execution of spl, u-boot.img gets authenticated. if authenticated correctly, android ics started. if not, dummy kernel shall started, nothing more showing error message (maybe boot logo).

thus, have 3 challenges:

  1. i need pass u-boot.img different parameters, boot different kernel images based on authentication process.
  2. i need integrate kind of dummy kernel, nothing displaying boot screen.
  3. i need modify boot screen own version.

i know how perform last step, since boot screen seems zip file, needs replaces. however, give me hints regarding first , second task?

thanks, p

i think mean authenticate kernel. correct? if want that, u-boot has capability. can of in script either boot authenticated kernel or display splash screen.

for splash screen, there several ways it. 1 way use u-boot command, depending on version, display bitmap stored in flash or on sd card. other way require convert bitmap header file , rebuild u-boot image. can give directions if tell me want store image , version of u-boot using. rebuilding image, need know source using, can add header bitmap. data format display (rgb 565, etc.)?

where kernel going stored , method going authenticate it?


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