Hi Frederic,
On 03/01/2018 07:02 AM, KONRAD Frederic wrote:
We often use a bootloader for this board. So lets set the uart in a state
which it can emit characters as if we were using a bootloader.
Signed-off-by: KONRAD Frederic <address@hidden>
---
hw/char/grlib_apbuart.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/char/grlib_apbuart.c b/hw/char/grlib_apbuart.c
index bac11be..a8020ea 100644
--- a/hw/char/grlib_apbuart.c
+++ b/hw/char/grlib_apbuart.c
@@ -265,8 +265,8 @@ static void grlib_apbuart_reset(DeviceState *d)
/* Transmitter FIFO and shift registers are always empty in QEMU */
uart->status = UART_TRANSMIT_FIFO_EMPTY | UART_TRANSMIT_SHIFT_EMPTY;
- /* Everything is off */
- uart->control = 0;
+ /* Enable Tx and Rx as the bootloader would do */
+ uart->control = UART_RECEIVE_ENABLE | UART_TRANSMIT_ENABLE;
I don't think this is the correct approach, as we want to reflect the
real hardware behavior here.
I think the correct QEMU-way is add a tiny asm bootloader in ram in
leon3_generic_hw_init(), which enables the UART.
See write_bootloader() in hw/mips/mips_fulong2e.c for example.
Regards,
Phil.
/* Flush receive FIFO */
uart->len = 0;
uart->current = 0;