u-boot/arch/arm/cpu/armv8/xen/lowlevel_init.S
Andrii Anisov 770a8eef3e board: Introduce xenguest_arm64 board
Introduce a minimal Xen guest board running as a virtual
machine under Xen Project's hypervisor [1], [2].

Part of the code is ported from Xen mini-os and also uses
work initially done by different authors from NXP: please see
relevant files for their copyrights.

[1] https://xenbits.xen.org
[2] https://wiki.xenproject.org/

Signed-off-by: Andrii Anisov <andrii_anisov@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>
2020-08-14 15:18:27 -04:00

33 lines
577 B
ArmAsm

/* SPDX-License-Identifier: GPL-2.0+
*
* (C) 2017 NXP
* (C) 2020 EPAM Systems Inc.
*/
#include <config.h>
.align 8
.global rom_pointer
rom_pointer:
.space 32
/*
* Routine: save_boot_params (called after reset from start.S)
*/
.global save_boot_params
save_boot_params:
/* The firmware provided ATAG/FDT address can be found in r2/x0 */
adr x1, rom_pointer
stp x0, x2, [x1], #16
stp x3, x4, [x1], #16
/* Returns */
b save_boot_params_ret
.global restore_boot_params
restore_boot_params:
adr x1, rom_pointer
ldp x0, x2, [x1], #16
ldp x3, x4, [x1], #16
ret