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* x86: Tidy up the 64-bit calling codeSimon Glass2015-08-051-2/+2
| | | | | | | | The GDT works but technically the length is incorrect. Fix this and add a comment. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* x86: Add support for starting 64-bit kernelSimon Glass2014-10-281-0/+93
Add code to jump to a 64-bit Linux kernel. We need to set up a flat page table structure, a new GDT and then go through a few hoops in the right order. Signed-off-by: Simon Glass <sjg@chromium.org>
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