Re: [U-Boot] mkimage and XIP vs entry point

Re. XIP, we recently did some boot time optimizations and found that if we loaded the uncompressed kernel-only uImage to RAM (diskboot) with the load address in the uImage the same as the load address given to diskboot and the execute addres at +64 then we shaved off 0.15 seconds by letting the kernel do its own relocation instead of U-Boot relocating the whole image. (PPC8247@66MHz bus, 2.9MB kernel)

Just to be clear, we're *not* using an XIP kernel, we're just letting it trigger the XIP start condition in cmd_bootm and letting the kernel do its own relocation magic. Using an XIP kernel at the RAM-loaded location would have saved the other 0.10 seconds but it didn't seem worth the effort to update and integrate the XIP patch.

-- Ken