| commit | 4c33c26909735ef4b37c3d926cf2ea479f7d532a | [log] [tgz] |
|---|---|---|
| author | Samuel Holland <samuel@sholland.org> | Sun Sep 12 10:56:09 2021 -0500 |
| committer | Leo Yu-Chi Liang <ycliang@andestech.com> | Thu Oct 07 16:08:23 2021 +0800 |
| tree | c1c7d9166ae8d2ede7fa861d08b56be6ef459951 | |
| parent | e72139e59db83da089b02b722e99e2446fc19709 [diff] |
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>