Change in coreboot[master]: arch/x86: Save resume vector to stack in x86_64 mode

[Iru Cai (vimacs) (Code Review)]

Attention is currently required from: Patrick Rudolph, Iru Cai, Iru Cai (vimacs).
Hello build bot (Jenkins), Patrick Rudolph, Paul Menzel, Arthur Heymans, Iru Cai,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/55947

to look at the new patch set (#4).

Change subject: arch/x86: Save resume vector to stack in x86_64 mode
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arch/x86: Save resume vector to stack in x86_64 mode

In x86_64, the first function parameter is passed in rdi register, and
the 32-bit code after exiting long mode reads the resume vector in
4(%esp), so it's needed to save the resume vector from rdi to 4(%rsp).

Also note that the function attribute "regparm" only works on x86-32
targets according to the GCC manual, so "asmlinkage" doesn't change
the ABI of an x86_64 function.

Tested on HP EliteBook 2560p. The laptop can resume from S3 in x86_64
mode after this change.

Change-Id: I45f2678071b2511c0af5dce9d9b73ac70dfd7252
Signed-off-by: Iru Cai 
---
M src/arch/x86/wakeup.S
1 file changed, 7 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/47/55947/4