[PATCH 3/8] add mem64_min/max control

[Yinghai Lu]

On Sat, Nov 17, 2012 at 12:41 PM, H. Peter Anvin <hpa at zytor.com> wrote:
> Sorry, with "real mode" are we talking about struct boot_params or the actual realmode trampoline?  The latter needs to be < 640K as a hw requirement.

boot_params.

when kexec bzImage64, kexec will copy that from bzImage file, and
update it....and
pass pointer to arch/x86/boot/compressed/head_64.c via %rsi