litex/misoclib/cpuif.py

69 lines
2.0 KiB
Python

from migen.bank.description import CSRStatus
def _get_rw_functions(reg_name, reg_base, size, read_only):
r = ""
r += "#define CSR_"+reg_name.upper()+"_ADDR "+hex(reg_base)+"\n"
r += "#define CSR_"+reg_name.upper()+"_SIZE "+str(size)+"\n"
if size > 8:
raise NotImplementedError("Register too large")
elif size > 4:
ctype = "unsigned long long int"
elif size > 2:
ctype = "unsigned int"
elif size > 1:
ctype = "unsigned short int"
else:
ctype = "unsigned char"
r += "static inline "+ctype+" "+reg_name+"_read(void) {\n"
if size > 1:
r += "\t"+ctype+" r = MMPTR("+hex(reg_base)+");\n"
for byte in range(1, size):
r += "\tr <<= 8;\n\tr |= MMPTR("+hex(reg_base+4*byte)+");\n"
r += "\treturn r;\n}\n"
else:
r += "\treturn MMPTR("+hex(reg_base)+");\n}\n"
if not read_only:
r += "static inline void "+reg_name+"_write("+ctype+" value) {\n"
for byte in range(size):
shift = (size-byte-1)*8
if shift:
value_shifted = "value >> "+str(shift)
else:
value_shifted = "value"
r += "\tMMPTR("+hex(reg_base+4*byte)+") = "+value_shifted+";\n"
r += "}\n"
return r
def get_csr_header(csr_base, bank_array, interrupt_map):
r = "#ifndef __HW_CSR_H\n#define __HW_CSR_H\n#include <hw/common.h>\n"
for name, csrs, mapaddr, rmap in bank_array.banks:
r += "\n/* "+name+" */\n"
reg_base = csr_base + 0x800*mapaddr
r += "#define "+name.upper()+"_BASE "+hex(reg_base)+"\n"
for csr in csrs:
nr = (csr.size + 7)//8
r += _get_rw_functions(name + "_" + csr.name, reg_base, nr, isinstance(csr, CSRStatus))
reg_base += 4*nr
try:
interrupt_nr = interrupt_map[name]
except KeyError:
pass
else:
r += "#define "+name.upper()+"_INTERRUPT "+str(interrupt_nr)+"\n"
r += "\n#endif\n"
return r
def get_csr_csv(csr_base, bank_array):
r = ""
for name, csrs, mapaddr, rmap in bank_array.banks:
reg_base = csr_base + 0x800*mapaddr
for csr in csrs:
nr = (csr.size + 7)//8
r += "{}_{},0x{:08x},{},{}\n".format(name, csr.name, reg_base, nr, "ro" if isinstance(csr, CSRStatus) else "rw")
reg_base += 4*nr
return r