diff options
| -rw-r--r-- | drivers/serial/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/serial/Makefile | 1 | ||||
| -rw-r--r-- | drivers/serial/serial_sbi.c | 16 |
3 files changed, 27 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 3bb5b02eab..122a39789c 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -280,6 +280,14 @@ config DEBUG_EFI_CONSOLE U-Boot when running on top of EFI (Extensive Firmware Interface). This is a type of BIOS used by PCs. +config DEBUG_SBI_CONSOLE + bool "SBI" + depends on SBI_V01 + help + Select this to enable a debug console which calls back to SBI to + output to the console. This can be useful for early debugging of + U-Boot when running on top of SBI (Supervisor Binary Interface). + config DEBUG_UART_S5P bool "Samsung S5P" depends on ARCH_EXYNOS || ARCH_S5PC1XX @@ -442,6 +450,7 @@ endchoice config DEBUG_UART_BASE hex "Base address of UART" depends on DEBUG_UART + default 0 if DEBUG_SBI_CONSOLE default 0 if DEBUG_UART_SANDBOX help This is the base address of your UART for memory-mapped UARTs. @@ -452,6 +461,7 @@ config DEBUG_UART_BASE config DEBUG_UART_CLOCK int "UART input clock" depends on DEBUG_UART + default 0 if DEBUG_SBI_CONSOLE default 0 if DEBUG_UART_SANDBOX default 0 if DEBUG_MVEBU_A3700_UART help diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 3cbea8156f..4edd2aa945 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_ATMEL_USART) += atmel_usart.o obj-$(CONFIG_BCM6345_SERIAL) += serial_bcm6345.o obj-$(CONFIG_COREBOOT_SERIAL) += serial_coreboot.o obj-$(CONFIG_CORTINA_UART) += serial_cortina.o +obj-$(CONFIG_DEBUG_SBI_CONSOLE) += serial_sbi.o obj-$(CONFIG_EFI_APP) += serial_efi.o obj-$(CONFIG_LPC32XX_HSUART) += lpc32xx_hsuart.o obj-$(CONFIG_MCFUART) += serial_mcf.o diff --git a/drivers/serial/serial_sbi.c b/drivers/serial/serial_sbi.c new file mode 100644 index 0000000000..b9f35ed36e --- /dev/null +++ b/drivers/serial/serial_sbi.c @@ -0,0 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <debug_uart.h> +#include <asm/sbi.h> + +static inline void _debug_uart_init(void) +{ +} + +static inline void _debug_uart_putc(int c) +{ + if (CONFIG_IS_ENABLED(RISCV_SMODE)) + sbi_console_putchar(c); +} + +DEBUG_UART_FUNCS |