Currently we only offer an SBI based debug UART for SBI v0.1.
With OpenSBI 1.3 the Debug Console Extension (DBCN) has become available.
This allows us to implement a debug UART in a device independent manor.
v2:
In the driver check that we are in S-mode.
Heinrich Schuchardt (2):
risc-v: implement DBCN write byte
risc-v: implement DBCN based debug console
arch/riscv/include/asm/sbi.h | 1 +
arch/riscv/lib/sbi.c | 16 ++++++++++++++++
drivers/serial/Kconfig | 5 ++++-
drivers/serial/serial_sbi.c | 20 ++++++++++++++++++++
4 files changed, 41 insertions(+), 1 deletion(-)
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2.40.1
