Hi Heinrich,
On Sat, Sep 23, 2023 at 01:35:26AM +0200, Heinrich Schuchardt wrote:
Most boards don't enable the pre-console buffer. So we will not see any early messages. OpenSBI 1.3 provides us with the debug console extension that can fill this gap.
For S-Mode U-Boot enable CONFIG_DEBUG_UART by default.
Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com
arch/riscv/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 1c62c2345b..06fae7ebe8 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -141,6 +141,7 @@ config RISCV_MMODE
config RISCV_SMODE bool "Supervisor"
- imply DEBUG_UART
This patch will cause the following compilation warnings. Could you take a look at them ?
It seems that some configuration values will not be set if we imply DEBUG_UART.
u-boot$ make qemu-riscv64_spl_defconfig HOSTCC scripts/basic/fixdep HOSTCC scripts/kconfig/conf.o YACC scripts/kconfig/zconf.tab.c LEX scripts/kconfig/zconf.lex.c HOSTCC scripts/kconfig/zconf.tab.o HOSTLD scripts/kconfig/conf # # configuration written to .config #
u-boot$ make ARCH_FLAGS="-march=rv64imafdc" -j`nproc` scripts/kconfig/conf --syncconfig Kconfig .config:78:warning: symbol value '' invalid for DEBUG_UART_BASE .config:79:warning: symbol value '' invalid for DEBUG_UART_CLOCK .config:1347:warning: symbol value '' invalid for SPL_DEBUG_UART_BASE ...
Best regards, Leo
help Choose this option to build U-Boot for RISC-V S-Mode.
-- 2.40.1