of_read_addr
size = of_read_addr(reg + na, ns);
result = of_read_addr(addr, na);
result = of_read_addr(addr, dna);
size = of_read_addr(reg + na, ns);
result = of_read_addr(addr, na);
result = of_read_addr(addr, dna);
u64 a = of_read_addr(addr, na);
u64 b = of_read_addr(base, na);
b += of_read_addr(size, ns);