Generating fields.

This commit is contained in:
pca006132 2020-07-29 11:58:56 +08:00
parent 1cc788c9a1
commit 08f7f8faae

75
main.py
View File

@ -50,7 +50,7 @@ def parse_register_fields():
fields = [
r'name: \w+',
r'bits: \d+(:\d+)?',
r'type: \w+',
r'access: \w+',
f'reset: {ADDRESS_PATTERN}',
r'description: .+'
]
@ -129,9 +129,9 @@ def interpret_field(field):
if m.group(3) is not None:
low = int(m.group(3))
result = {}
result['name'] = field['name'][0]
result['name'] = field['name'][0].strip()
result['bits'] = [low, high]
result['type'] = field['type'][0]
result['access'] = field['access'][0].strip()
return result
def interpret(reg):
@ -140,11 +140,11 @@ def interpret(reg):
result = {}
name_pattern = None
expected = [
['Name', 'name', lambda v: ''.join(v)],
['Name', 'name', lambda v: ''.join(v).strip()],
['Relative Address', 'rel', lambda v: int(v[0], 16)],
['Absolute Address', 'abs', lambda v: int(v[0], 16)],
['Width', 'width', lambda v: int(width_pattern.fullmatch(v[0]).group(1))],
['Access Type', 'access', lambda v: v[0]],
['Access Type', 'access', lambda v: v[0].strip()],
['Reset Value', 'reset', lambda v: v[0]],
['Description', 'description', lambda v: ' '.join(v)]
]
@ -180,6 +180,67 @@ def snake_to_camel(name: str):
result.append(c.lower())
return ''.join(result)
def access_to_type(access: str):
access = access.upper()
if access in ['RO', 'RW', 'WO']:
return access
elif access in ['MIXED', 'WTC']:
return 'RW'
raise ValueError(access)
def fields_to_rust(reg):
fields = reg['fields']
name_pattern = re.compile(r'(.+\w)\d+')
access = access_to_type(reg['access'])
if fields == []:
return (f'{access}<u{reg["width"]}>', [])
if len(fields) == 1:
bits = fields[0]['bits']
if bits[1] - bits[0] + 1 == reg['width']:
return (f'{access_to_type(reg["access"])}<u{reg["width"]}>', [])
namespace = reg['name'].lower()
name = snake_to_camel(reg['name'])
if 'similar' in reg:
# remove the trailing digits
name = name_pattern.fullmatch(name).group(1)
namespace = name_pattern.fullmatch(namespace).group(1)
bitmask = 0
has_wtc = False
lines = []
for f in fields:
field_name = f['name'].lower()
field_access = f['access'].upper()
[low, high] = f['bits']
assert low <= high
if field_access == 'WTC':
has_wtc = True
else:
for i in range(high - low + 1):
bitmask |= 1 << (i + low)
if low == high:
wtc = ', WTC' if field_access == 'WTC' else ''
lines.append(f'register_bit!({namespace}, {field_name}, {low}{wtc});')
else:
value_range = ''
if high - low < 8:
value_range = 'u8'
elif high - low < 32:
value_range = 'u32'
else:
raise ValueError([low, high])
if field_access == 'WTC':
# we did not implement WTC for multiple bits, but could be done
raise ValueError()
lines.append(f'register_bits!({namespace}, {field_name},'
f'{value_range}, {low}, {high});')
if has_wtc:
lines.insert(0, f'register!({namespace}, {name}, {access},'
f' u{reg["width"]}, {bitmask});')
else:
lines.insert(0, f'register!({namespace}, {name}, {access},'
f' u{reg["width"]});')
return (name, lines)
def emit_rust(base_addr, ending_addr, registers):
current_addr = base_addr
reserved_id = 0
@ -225,4 +286,8 @@ for line in sys.stdin:
v = end_iterator(parser)
for reg in v:
reg = interpret(reg)
(name, lines) = fields_to_rust(reg)
print(reg)
print(name)
print(lines)
print('----')