Inochi Amaoto caeb1757f6 arch/risc-v: Improve the SBI function handle
To simplify processing, the existed SBI function code is just
invoking the ecall and return the error value. This omits
potential return value in "a1", which is defined in SBI doc.
Add the "sbiret" struct so it can handle all the return value.

In addition, there are some minor improvement:
1. move the SBI related interface to a separate file to make it clean.
2. add all necessary SBI ecall interface macro until version 2.0.
3. add an utilty function to convert sbi error numner to standard
error number.

Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
2024-06-19 20:55:10 +08:00
2024-05-13 22:24:36 +02:00
2024-04-12 17:42:49 +08:00
2023-03-07 14:15:55 +01:00
2024-03-17 10:00:25 -03:00
2023-10-28 13:55:56 +08:00
2023-09-26 20:41:00 +08:00

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Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

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