bslathi19/PeakRDL-BusDecoder
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apb4 if working?

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This commit is contained in:
Arnav Sacheti
2025-10-20 22:09:25 -07:00
parent f956232a62
commit 395f584f52
9 changed files with 106 additions and 57 deletions
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26
src/peakrdl_busdecoder/decode_logic_gen.py
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@@ -39,17 +39,20 @@ class DecodeLogicGenerator(BusDecoderListener):
# Initial Stack Conditions
self._decode_stack.append(IfBody())
def cpuif_addr_predicate(self, node: AddressableNode) -> list[str]:
def cpuif_addr_predicate(self, node: AddressableNode, total_size: bool = True) -> list[str]:
# Generate address bounds
addr_width = self._ds.addr_width
l_bound = SVInt(
node.raw_absolute_address,
addr_width,
)
u_bound = l_bound + SVInt(node.total_size, addr_width)
if total_size:
u_bound = l_bound + SVInt(node.total_size, addr_width)
else:
u_bound = l_bound + SVInt(node.size, addr_width)
array_stack = list(self._array_stride_stack)
if node.array_dimensions:
if total_size and node.array_dimensions:
array_stack = array_stack[: -len(node.array_dimensions)]
# Handle arrayed components
@@ -79,7 +82,6 @@ class DecodeLogicGenerator(BusDecoderListener):
conditions: list[str] = []
conditions.extend(self.cpuif_addr_predicate(node))
conditions.extend(self.cpuif_prot_predicate(node))
condition = " && ".join(f"({c})" for c in conditions)
# Generate condition string and manage stack
@@ -111,12 +113,14 @@ class DecodeLogicGenerator(BusDecoderListener):
return
ifb = self._decode_stack.pop()
if ifb:
self._decode_stack[-1] += ifb
else:
self._decode_stack[-1] += (
f"{self._flavor.cpuif_select}.{get_indexed_path(self._ds.top_node, node)} = 1'b1;"
)
if not ifb and isinstance(ifb, IfBody):
conditions: list[str] = []
conditions.extend(self.cpuif_addr_predicate(node, total_size=False))
condition = " && ".join(f"({c})" for c in conditions)
with ifb.cm(condition) as b:
b += f"{self._flavor.cpuif_select}.{get_indexed_path(self._ds.top_node, node)} = 1'b1;"
self._decode_stack[-1] += ifb
for _ in node.array_dimensions:
b = self._decode_stack.pop()
@@ -135,6 +139,6 @@ class DecodeLogicGenerator(BusDecoderListener):
body = self._decode_stack[-1]
if isinstance(body, IfBody):
with body.cm(...) as b:
b += f"{self._flavor.cpuif_select}.bad_addr = 1'b1;"
b += f"{self._flavor.cpuif_select}.cpuif_err = 1'b1;"
return str(body)