diff options
| author | Heinrich Schuchardt | 2023-09-04 13:24:03 +0200 |
|---|---|---|
| committer | Leo Yu-Chi Liang | 2023-09-05 10:53:55 +0800 |
| commit | d14222e7c152e36bf7d370c2623242a22fb9e821 (patch) | |
| tree | 2c93ebf14147fc4eeefc9f48f16dddbf849df99b /arch/riscv/lib | |
| parent | ef08687ea0e2b5d57a1df51e6613bc4263747943 (diff) | |
risc-v: implement DBCN write byte
The DBCN extension provides a Console Write Byte call.
Implement function sbi_dbcn_write_byte to invoke it.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Diffstat (limited to 'arch/riscv/lib')
| -rw-r--r-- | arch/riscv/lib/sbi.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/riscv/lib/sbi.c b/arch/riscv/lib/sbi.c index 8724e3a4600..55a3bc3b5c9 100644 --- a/arch/riscv/lib/sbi.c +++ b/arch/riscv/lib/sbi.c @@ -204,6 +204,22 @@ void sbi_srst_reset(unsigned long type, unsigned long reason) 0, 0, 0, 0); } +/** + * sbi_dbcn_write_byte() - write byte to debug console + * + * @ch: byte to be written + * Return: SBI error code (SBI_SUCCESS = 0 on success) + */ +int sbi_dbcn_write_byte(unsigned char ch) +{ + struct sbiret ret; + + ret = sbi_ecall(SBI_EXT_DBCN, + SBI_EXT_DBCN_CONSOLE_WRITE_BYTE, + ch, 0, 0, 0, 0, 0); + return ret.error; +} + #ifdef CONFIG_SBI_V01 /** |