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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* 64-bit x86 Startup Code
*
* Copyright 2019 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <config.h>
.section .text.start
.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
xor %rdi, %rdi
call board_init_f
call board_init_f_r
/* Should not return here */
jmp .
.globl board_init_f_r_trampoline64
.type board_init_f_r_trampoline64, @function
board_init_f_r_trampoline64:
/*
* SDRAM has been initialised, U-Boot code has been copied into
* RAM, BSS has been cleared and relocation adjustments have been
* made. It is now time to jump into the in-RAM copy of U-Boot
*
* %eax = Address of top of new stack
*/
/* Stack grows down from top of SDRAM */
movq %rsi, %rsp
/* New gd is in rdi */
/* Re-enter U-Boot by calling board_init_f_r() */
call board_init_f_r
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