Function sbi_rt::get_mimpid

pub fn get_mimpid() -> usize

Return value of mimpid register in the current environment.

This function returns a value that is legal for the mimpid register, and 0 is always a legal value for this register.

This function is defined in RISC-V SBI Specification chapter 4.7. According to the introduction of chapter 4, all base extension functions must success and return no error code.