PMP Test

[littlewhi]

I just want to test my cpu(FPGA) for PMP function. And the SOC(FPGA) of my cpu is like STM32, some blocks are for ram, some blocks are for peripherals. And the board resources are not enough, so I didn't implement all specifications of risc-v cpu, especially the CSR.

• Maybe you could put some basic requirement for implementation of risc-v cpu on document. So we could know what is needed.
• I see the syscall() in syscalls.c, but I want to know how many functions call this, and how many functions syscall() need to implement.(Actually, I know there seems to be just the syswrite to need.)
• The FPGA cpu will be death in syscall() which now is a version for HTIF. Maybe explain it in document.