upsilon/firmware/generate_csr_locations.py

145 lines
3.7 KiB
Python

#!/usr/bin/python3
import json
import sys
"""
This file uses csr.json and csr_bitwidth.json and writes functions
that handle reads and writes to MMIO.
"""
class CSRGenerator:
def __init__(self, csrjson, bitwidthjson, registers, outf, dacmax, adcmax):
self.registers = registers
self.csrs = json.load(open(csrjson))
self.bws = json.load(open(bitwidthjson))
self.file = outf
self.dacmax = dacmax
self.adcmax = adcmax
def get_reg(self, name, num):
if num is None:
regname = f"base_{name}"
else:
regname = f"base_{name}_{num}"
return self.csrs["csr_registers"][regname]["addr"]
def get_bitwidth_type(self, name):
b = self.bws[name]
if b <= 8:
return 8
elif b <= 16:
return 16
elif b <= 32:
return 32
elif b <= 64:
return 64
else:
raise Exception('unsupported width', b)
def print(self, *args):
print(*args, end='', file=self.file)
def print_write_fun(self, name, regnum):
typ = self.get_bitwidth_type(name)
self.print('static inline void\n')
self.print(f'write_{name}(uint{typ}_t v')
if regnum != 1:
self.print(f', int num')
self.print(')\n{\n')
if regnum != 1:
self.print('\t', f'static const uintptr_t loc[{regnum}]', '= {\n')
self.print('\t\t', self.get_reg(name,0), '\n')
for i in range(1,regnum):
self.print('\t\t,', self.get_reg(name, i), '\n')
self.print('\t};\n')
self.print('''
if (num < 0 || num >= ARRAY_SIZE(loc)) {
LOG_ERR("invalid location %d", num);
k_fatal_halt(K_ERR_KERNEL_OOPS);
}
''')
self.print('\t', f'litex_write{typ}(v, {"loc[num]" if regnum != 1 else self.get_reg(name, None)});', '\n}\n\n')
def print_read_fun(self, name, regnum):
typ = self.get_bitwidth_type(name)
self.print(f'static inline uint{typ}_t\nread_{name}')
if regnum != 1:
self.print(f'(int num)', '\n{\n')
else:
self.print('(void)\n{\n')
if regnum != 1:
self.print('\t', f'static const uintptr_t loc[{regnum}]', '= {\n')
self.print('\t\t', self.get_reg(name,0), '\n')
for i in range(1,regnum):
self.print('\t\t,', self.get_reg(name, i), '\n')
self.print('\t};\n')
self.print('''
if (num < 0 || num >= ARRAY_SIZE(loc)) {
LOG_ERR("invalid location %d", num);
k_fatal_halt(K_ERR_KERNEL_OOPS);
}
''')
self.print('\t', f'return litex_read{typ}({"loc[num]" if regnum != 1 else self.get_reg(name, None)}', ');\n}\n\n')
def print_file(self):
self.print('''
#pragma once
static inline void litex_write64(uint64_t value, unsigned long addr)
{
#if CONFIG_LITEX_CSR_DATA_WIDTH >= 32
sys_write32(value >> 32, addr);
sys_write32(value, addr + 0x4);
#else
# error Unsupported CSR data width
#endif
}
''')
self.print('#define DAC_MAX', self.dacmax, '\n')
self.print('#define ADC_MAX', self.adcmax, '\n')
for reg in self.registers:
self.print_read_fun(reg[1],reg[2])
if not reg[0]: #read only
self.print_write_fun(reg[1],reg[2])
if __name__ == "__main__":
dac_num = 8
adc_num = 8
registers = [
# Read-only, name, number
(False, "dac_sel", dac_num),
(True, "dac_finished", dac_num),
(False, "dac_arm", dac_num),
(True, "from_dac", dac_num),
(False, "to_dac", dac_num),
(False, "wf_arm", dac_num),
(False, "wf_halt_on_finish", dac_num),
(True, "wf_finished", dac_num),
(True, "wf_running", dac_num),
(False, "wf_time_to_wait", dac_num),
(False, "wf_refresh_start", dac_num),
(True, "wf_refresh_finished", dac_num),
(False, "wf_start_addr", dac_num),
(True, "adc_finished", adc_num),
(False, "adc_arm", adc_num),
(True, "from_adc", adc_num),
(False, "adc_sel", adc_num),
(True, "cl_in_loop", 1),
(False, "cl_cmd", 1),
(False, "cl_word_in", 1),
(False, "cl_word_out", 1),
(False, "cl_start_cmd", 1),
(True, "cl_finish_cmd", 1),
]
CSRGenerator("csr.json", "csr_bitwidth.json", registers, sys.stdout, dac_num, adc_num).print_file()