9 Aug
2015
9 Aug
'15
5:07 p.m.
On 2 August 2015 at 18:07, Simon Glass sjg@chromium.org wrote:
Enable the debug UART and emit a single 'a' early in the init sequence to show that it is working.
Unfortunately the debug UART implementation needs a stack to work. I cannot seem to remove this limitation as the absolute 'jmp %eax' instruction goes off into the weeds.
So this means that the character output cannot be any earlier than car_init_ret, where memory is available for a stack.
Signed-off-by: Simon Glass sjg@chromium.org Reviewed-by: Lukasz Majewski l.majewski@samsung.com
Changes in v2:
- Put the debug UART setup code in comments since we don't always want it
arch/x86/cpu/start.S | 9 +++++++++ configs/minnowmax_defconfig | 4 ++++ 2 files changed, 13 insertions(+)
Applied to u-boot-dm.