On Mon 2013-03-18 17:57:46, Russell King - ARM Linux wrote: > On Mon, Mar 18, 2013 at 06:49:32PM +0100, Pavel Machek wrote: > > What I wanted to say is that kernel build traditionaly produced > > something useful, something bootloader can actually boot. Currently, > > make uImage produces u-boot image. Please keep that capability. > > Unfortunately, there is a fundamental problem with uImage. It encodes > the load address, and that is utterly incompatible with the goal of > having a kernel image which boots on multiple platforms. > > uImage isn't going anywhere for the time being, but you will find > that: > > a) recent kernels will just wrap the zImage without a DTB, so > appended DTBs can't be used with it > b) it won't work with MULTIPLATFORM-enabled kernels, unless you > provide make with a LOADADDR= argument to tell it where the > uImage is to be loaded - which is platform specific. > > (b) fundamentally can't be solved in kbuild. If you want to use > uImage with multiple platforms from the same zImage, then you need > to generate multiple uImage files with different load addresses. > That's purely - and solely - down to the dysfunctional uImage format. I know. uImage is not perfect. But solution should be "adopt a better format" (ARM FIT?), not "drop support for making useful images altogether" as Olof proposed before. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
