u-boot/arch/x86/cpu/start64.S
Simon Glass dca9220c35 x86: Add 64-bit start-up code
Add code to start up U-Boot in 64-bit mode. It is fairly simple since we are
running from RAM and SPL has done the low-level init.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2017-02-06 11:38:46 +08:00

28 lines
469 B
ArmAsm

/*
* 64-bit x86 Startup Code
*
* (C) Copyright 216 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
.section .text
.code64
.globl _start
.type _start, @function
_start:
/* Set up memory using the existing stack */
mov %rsp, %rdi
call board_init_f_alloc_reserve
mov %rax, %rsp
call board_init_f_init_reserve
call board_init_f
call board_init_f_r
/* Should not return here */
jmp .