bslathi19/PeakRDL-regblock
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Implement read buffering. (#22)

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This commit is contained in:
Alex Mykyta
2022-11-06 23:28:07 -08:00
parent 279a3c5788
commit 9e76a712a7
19 changed files with 813 additions and 77 deletions
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32
src/peakrdl_regblock/field_logic/__init__.py
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@@ -175,8 +175,13 @@ class FieldLogic:
"""
Asserted when field is software accessed (read)
"""
strb = self.exp.dereferencer.get_access_strobe(field)
return f"{strb} && !decoded_req_is_wr"
buffer_reads = field.parent.get_property('buffer_reads')
if buffer_reads:
rstrb = self.exp.read_buffering.get_trigger(field.parent)
return rstrb
else:
strb = self.exp.dereferencer.get_access_strobe(field)
return f"{strb} && !decoded_req_is_wr"
def get_swmod_identifier(self, field: 'FieldNode') -> str:
"""
@@ -186,6 +191,7 @@ class FieldLogic:
w_modifiable = field.is_sw_writable
r_modifiable = (field.get_property('onread') is not None)
buffer_writes = field.parent.get_property('buffer_writes')
buffer_reads = field.parent.get_property('buffer_reads')
if w_modifiable and not r_modifiable:
# assert swmod only on sw write
@@ -200,10 +206,18 @@ class FieldLogic:
if w_modifiable and r_modifiable:
# assert swmod on both sw read and write
if buffer_writes:
astrb = self.exp.dereferencer.get_access_strobe(field)
wstrb = self.exp.write_buffering.get_write_strobe(field)
rstrb = f"{astrb} && !decoded_req_is_wr"
astrb = self.exp.dereferencer.get_access_strobe(field)
if buffer_writes or buffer_reads:
if buffer_reads:
rstrb = self.exp.read_buffering.get_trigger(field.parent)
else:
rstrb = f"{astrb} && !decoded_req_is_wr"
if buffer_writes:
wstrb = self.exp.write_buffering.get_write_strobe(field)
else:
wstrb = f"{astrb} && decoded_req_is_wr"
return f"{wstrb} || {rstrb}"
else:
# Unbuffered. Use decoder strobe directly
@@ -213,7 +227,11 @@ class FieldLogic:
if not w_modifiable and r_modifiable:
# assert swmod only on sw read
astrb = self.exp.dereferencer.get_access_strobe(field)
return f"{astrb} && !decoded_req_is_wr"
if buffer_reads:
rstrb = self.exp.read_buffering.get_trigger(field.parent)
else:
rstrb = f"{astrb} && !decoded_req_is_wr"
return rstrb
# Not sw modifiable
return "1'b0"