diff options
| author | Simon Glass | 2017-01-16 07:03:48 -0700 |
|---|---|---|
| committer | Bin Meng | 2017-02-06 11:38:46 +0800 |
| commit | dca9220c355612beeb5b78ff1c4be54d626fbb5b (patch) | |
| tree | a08e209898c0fb4ef2a696444e25828273adc3ad /arch/x86/cpu/start64.S | |
| parent | 987116f7f6432f07bcfbbaf5cff6c62503edad1e (diff) | |
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>
Diffstat (limited to 'arch/x86/cpu/start64.S')
| -rw-r--r-- | arch/x86/cpu/start64.S | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/x86/cpu/start64.S b/arch/x86/cpu/start64.S new file mode 100644 index 00000000000..651f16ac89c --- /dev/null +++ b/arch/x86/cpu/start64.S @@ -0,0 +1,28 @@ +/* + * 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 . |