tree ef97aa4ad282bab394fdbd0b8ee8c1847b38d351
parent 3710802ebfc42e24fa6b7f8b78f3d668dac1363e
author Simon Glass <sjg@chromium.org> 1689478732 -0600
committer Bin Meng <bmeng@tinylab.org> 1689585127 +0800

x86: Improve the trampoline in 64-bit mode

At present this leaves the stack at the pre-relocation value. This is not
ideal since we want to have U-Boot running entirely from the top of
memory.

In addition, the new global_data pointer is not actually used, since
the global_data pointer itself is relocated, then the pre-relocation value
is changed, so the effective value (after relocation) does not update.

Adjust the implementation to follow the 32-bit code more closely, with a
trampoline function which is passed the new stack and global_data pointer.
This ensures that the correct values come through even when relocating.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>