94 lines
2.6 KiB
Python
94 lines
2.6 KiB
Python
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from operator import itemgetter
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import re
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from migen.fhdl.std import *
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from migen.bank.description import CSRStatus
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def get_macros(filename):
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f = open(filename, "r")
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r = {}
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for line in f:
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match = re.match("\w*#define\s+(\w+)\s+(.*)", line, re.IGNORECASE)
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if match:
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r[match.group(1)] = match.group(2)
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return r
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def _get_rw_functions(reg_name, reg_base, size, read_only):
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r = ""
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if size > 8:
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raise NotImplementedError("Register too large")
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elif size > 4:
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ctype = "unsigned long long int"
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elif size > 2:
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ctype = "unsigned int"
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elif size > 1:
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ctype = "unsigned short int"
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else:
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ctype = "unsigned char"
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r += "static inline "+ctype+" "+reg_name+"_read(void) {\n"
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if size > 1:
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r += "\t"+ctype+" r = MMPTR("+hex(reg_base)+");\n"
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for byte in range(1, size):
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r += "\tr <<= 8;\n\tr |= MMPTR("+hex(reg_base+4*byte)+");\n"
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r += "\treturn r;\n}\n"
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else:
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r += "\treturn MMPTR("+hex(reg_base)+");\n}\n"
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if not read_only:
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r += "static inline void "+reg_name+"_write("+ctype+" value) {\n"
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for byte in range(size):
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shift = (size-byte-1)*8
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if shift:
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value_shifted = "value >> "+str(shift)
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else:
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value_shifted = "value"
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r += "\tMMPTR("+hex(reg_base+4*byte)+") = "+value_shifted+";\n"
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r += "}\n"
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return r
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def get_csr_header(csr_base, bank_array):
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r = "#ifndef __HW_CSR_H\n#define __HW_CSR_H\n#include <hw/common.h>\n"
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for name, csrs, mapaddr, rmap in bank_array.banks:
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r += "\n/* "+name+" */\n"
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reg_base = csr_base + 0x800*mapaddr
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r += "#define "+name.upper()+"_BASE "+hex(reg_base)+"\n"
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for csr in csrs:
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nr = (csr.size + 7)//8
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r += _get_rw_functions(name + "_" + csr.name, reg_base, nr, isinstance(csr, CSRStatus))
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reg_base += 4*nr
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r += "\n#endif\n"
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return r
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def _get_py_rw_functions(reg_name, reg_base, size):
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r = ""
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r += "def "+reg_name+"_read(bus):\n"
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r += "\tr = bus.read_csr("+hex(reg_base)+")\n"
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for byte in range(1, size):
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r += "\tr <<= 8\n\tr |= bus.read_csr("+hex(reg_base+4*byte)+")\n"
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r += "\treturn r\n\n"
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r += "def "+reg_name+"_write(bus, value):\n"
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for byte in range(size):
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shift = (size-byte-1)*8
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if shift:
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value_shifted = "value >> "+str(shift)
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else:
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value_shifted = "value"
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r += "\tbus.write_csr("+hex(reg_base+4*byte)+", ("+value_shifted+")&0xff)\n"
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r += "\n"
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return r
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def get_py_csr_header(csr_base, bank_array):
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r = ""
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for name, csrs, mapaddr, rmap in bank_array.banks:
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r += "\n# "+name+"\n"
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reg_base = csr_base + 0x800*mapaddr
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r += name.upper()+"_BASE ="+hex(reg_base)+"\n"
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for csr in csrs:
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nr = (csr.size + 7)//8
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r += _get_py_rw_functions(name + "_" + csr.name, reg_base, nr)
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reg_base += 4*nr
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return r
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