From: Markus Valentin <mv@denx.de>
Date: Wed, 30 Nov 2016 12:32:08 +0100
Subject: [U-Boot] uefi: x86: uboot as uefi payload
Message-ID: <1480505528.5722.24.camel@denx.de>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

Hi,

im trying to run u-boot as uefi-payload for qemu this works totally
fine.
?
My real target is a Minnowboard Turbot. I did use the
minnowmax_defconfig enabled CONFIG_EFI, CONFIG_EFI_STUB and
CONFIG_EFI_STUB_64BIT. The Board has the latest uefi by Intel
installed(0.93, X64).

When i load U-Boot as payload for the board-uefi the efi_main function
gets executed but the call to "cpu_call32" seems to get stuck ( i think
its at the "retf"?arch/x86/cpu/call32.S:37).?

Debuglog:

Shell> u-boot-payload_64.efi
U-Boot EFI Payload?
gdt: 00000047, addr: 00000000784fd570
00: 00000000??00000000
08: 00cf9200??0000ffff
10: 00af9a00??0000ffff
18: 00cf9300??0000ffff
20: 00cf9a00??0000ffff
28: 00000000??00000000
30: 00cf9200??0000ffff
38: 00af9b00??0000ffff
40: 00000000??00000000
?32-bit code segment: 20
?page_table: 79313000
?EFI table at 78787018 size 00000760

Does anyone have experiences with this issue or with running u-boot as
uefi-64 payload at all?

regard Markus
?
-- 
DENX Software Engineering GmbH,????? Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-60 Fax: (+49)-8142-66989-80 Email: mv at denx.de