On Fri, May 17, 2013 at 10:56:25PM +0200, Henrik Nordstr?m wrote: > fre 2013-05-17 klockan 14:17 -0400 skrev Tom Rini: > > > I would say you want to hypothetically add a _felboot build target for > > the allwinner boards that instead of building out a regular > > CONFIG_SPL_FRAMEWORK (I hope!) SPL spits out just a very tiny one that > > does what you need for this use case. Having different builds for > > different SPL cases is a normal thing that we do on a few boards, but > > none are quite so drastically different sounding as this. > > Yes the main SPL is using CONFIG_SPL_FRAMEWORK. But the low level board > initialization is done in s_init (via lowlevel_init). > > This other boot helper is basically only calling s_init() and then > returns to the caller with the board now configured in a reasonable > state allowing it to accept u-boot.bin to be uploaded into SDRAM.
If we can implement it cleanly, this isn't (at the 1000 meter view) all that much different than what we do on some PowerPC platforms today where everything must fit within a few kilobytes. -- Tom
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