mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +00:00
dfe0837494
Use the DBCN SBI extension to implement a debug console. Make it the default for S-mode RISC-V. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
36 lines
606 B
C
36 lines
606 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
|
|
#include <debug_uart.h>
|
|
#include <asm/sbi.h>
|
|
|
|
#ifdef CONFIG_SBI_V01
|
|
|
|
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);
|
|
}
|
|
|
|
#else
|
|
|
|
static int sbi_dbcn_available;
|
|
|
|
static inline void _debug_uart_init(void)
|
|
{
|
|
if (CONFIG_IS_ENABLED(RISCV_SMODE))
|
|
sbi_dbcn_available = sbi_probe_extension(SBI_EXT_DBCN);
|
|
}
|
|
|
|
static inline void _debug_uart_putc(int ch)
|
|
{
|
|
if (CONFIG_IS_ENABLED(RISCV_SMODE) && sbi_dbcn_available)
|
|
sbi_dbcn_write_byte(ch);
|
|
}
|
|
|
|
#endif
|
|
|
|
DEBUG_UART_FUNCS
|