On Wed, Mar 16, 2016 at 9:44 PM, Simon Glass <[email protected]> wrote: > Sometimes it is useful to jump into U-Boot directly from coreboot or UEFI > without any 16-bit init. This can help during development by allowing U-Boot > to avoid doing all the init required by the platform. > > U-Boot expects its GDT to be set up correctly by its 16-bit code. If > coreboot doesn't do this (because it hasn't run the payload setup code yet) > then this won't happen. > > In this case we cannot rely on the GDT settings. U-Boot will hang or crash > if these are wrong. Provide a development-only option to set up the GDT > correctly. This is just a hack so you can jump to U-Boot from any stage of > coreboot, not just at the end. > > Signed-off-by: Simon Glass <[email protected]> > --- > > Changes in v3: > - Add more detail to the commit message and code comments > > Changes in v2: None > > arch/x86/cpu/start.S | 80 > ++++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 80 insertions(+) >
Reviewed-by: Bin Meng <[email protected]> _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
