u-boot-brain/arch/x86/cpu/x86_64
Bin Meng 49d5ff439c x86: Fix the mystery of printch() during 64-bit boot
At present in arch_setup_gd() it calls printch(' ') at the end which
has been a mystery for a long time as without such call the 64-bit
U-Boot just does not boot at all.

In fact this is due to the bug that board_init_f() was called with
boot_flags not being set. Hence whatever value being there in the
rdi register becomes the boot_flags if without such magic call.
With a printch(' ') call the rdi register is initialized as 0x20
and this value seems to be sane enough for the whole boot process.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2018-10-22 17:51:45 +08:00
..
cpu.c x86: Fix the mystery of printch() during 64-bit boot 2018-10-22 17:51:45 +08:00
interrupts.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
Makefile x86: Add a dummy setjmp implementation for x86_64 2017-02-07 13:10:50 +08:00
setjmp.S x86: Add 64-bit setjmp/longjmp implementation 2018-06-24 08:56:04 +08:00