2 commits

Author	SHA1	Message	Date
Heinrich Schuchardt	dfe0837494	risc-v: implement DBCN based debug console ... 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>	2023-09-05 10:53:55 +08:00
Samuel Holland	41f7be7334	serial: Add a debug console using the RISC-V SBI interface ... The RISC-V SBI interface v0.1 provides a function for printing a character to the console. Even though SBI v0.1 functions are deprecated, the SBI console is quite useful for early debugging, because it works without any dcache, memory, or MMIO access in S mode. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>	2021-10-07 16:08:23 +08:00