tree f2a79f25d6633ebc1a1d5387bd172db8437f95b1
parent 09280363a12c671330edf34ef56cb2fd56285f74
author Bin Meng <bmeng.cn@gmail.com> 1539489129 -0700
committer Bin Meng <bmeng.cn@gmail.com> 1540201905 +0800

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>