bslathi19/PeakRDL-BusDecoder
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This commit is contained in:
Arnav Sacheti
2025-10-13 20:14:46 -07:00
parent 3eee8b9cdd
commit 54a199ca9c
17 changed files with 307 additions and 205 deletions
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2
src/peakrdl_busdecoder/cpuif/apb3/__init__.py
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@@ -1,4 +1,4 @@
from .apb3_cpuif import APB3Cpuif
from .apb3_cpuif_flat import APB3CpuifFlat
__all__ = ["APB3Cpuif", "APB3CpuifFlat"]
__all__ = ["APB3Cpuif", "APB3CpuifFlat"]

5
src/peakrdl_busdecoder/cpuif/apb3/apb3_cpuif.py
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@@ -1,4 +1,5 @@
from systemrdl.node import AddressableNode
from ..base_cpuif import BaseCpuif
@@ -17,9 +18,7 @@ class APB3Cpuif(BaseCpuif):
@property
def port_declaration(self) -> str:
slave_ports: list[str] = ["apb3_intf.slave s_apb"]
master_ports: list[str] = list(
map(self._port_declaration, self.addressable_children)
)
master_ports: list[str] = list(map(self._port_declaration, self.addressable_children))
return ",\n".join(slave_ports + master_ports)

1
src/peakrdl_busdecoder/cpuif/apb3/apb3_cpuif_flat.py
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@@ -1,4 +1,5 @@
from systemrdl.node import AddressableNode
from ..base_cpuif import BaseCpuif

84
src/peakrdl_busdecoder/cpuif/apb3/apb3_tmpl.sv
View File

@@ -30,86 +30,4 @@ assign {{self.signal("PWRITE", child)}} = {{self.signal("PWRITE")}};
assign {{self.signal("PADDR", child)}} = {{self.signal("PADDR")}} [{{child.addr_width - 1}}:0]; // FIXME: Check slicing
assign {{self.signal("PWDATA", child)}} = {{self.signal("PWDATA")}};
{%- endif -%}
{%- endfor -%}
//======================================================
// Address Decode Logic
//======================================================
always_comb begin
// Default all PSELx signals to 0
{%- for child in cpuif.addressable_children -%}
{%- if child is array -%}
for (int {{child.inst_name|lower}}_idx = 0; {{child.inst_name|lower}}_idx < N_{{child.inst_name|upper}}S; {{child.inst_name|lower}}_idx++) begin
{{self.signal("PSELx", child, f"{child.inst_name.lower()}_idx")}} = 1'b0;
end
{%- else -%}
{{self.signal("PSELx", child)}} = 1'b0;
{%- endif -%}
{%- endfor -%}
if ({{self.signal("PSELx")}}) begin
{%- for child in cpuif.addressable_children -%}
{%- if loop.first -%}
if ({{cpuif.get_address_decode_condition(child)}}) begin
{%- else -%}
end else if ({{cpuif.get_address_decode_condition(child)}}) begin
{%- endif -%}
// Address matched for {{child.inst_name}}
{%- if child is array -%}
for (genvar {{child.inst_name|lower}}_idx = 0; {{child.inst_name|lower}}_idx < N_{{child.inst_name|upper}}S; {{child.inst_name|lower}}_idx++) begin
{{self.signal("PSELx", child, f"{child.inst_name.lower()}_idx")}} = 1'b1;
end
{%- else -%}
{{self.signal("PSELx", child)}} = 1'b1;
{%- endif -%}
{%- if loop.last -%}
end else begin
// No address matched
{%- endif -%}
{%- endfor -%}
end
end else begin
// PSELx is low, nothing to do
end
end
//======================================================
// Read Data Mux
//======================================================
always_comb begin
// Default read data to 0
{{self.signal("PRDATA")}} = '0;
{{self.signal("PREADY")}} = 1'b1;
{{self.signal("PSLVERR")}} = 1'b0;
if ({{self.signal("PSELx")}} && !{{self.signal("PWRITE")}} && {{self.signal("PENABLE")}}) begin
{%- for child in cpuif.addressable_children -%}
{%- if loop.first -%}
if ({{cpuif.get_address_decode_condition(child)}}) begin
{%- else -%}
end else if ({{cpuif.get_address_decode_condition(child)}}) begin
{%- endif -%}
// Address matched for {{child.inst_name}}
{%- if child is array -%}
for (genvar {{child.inst_name|lower}}_idx = 0; {{child.inst_name|lower}}_idx < N_{{child.inst_name|upper}}S; {{child.inst_name|lower}}_idx++) begin
{{self.signal("PRDATA")}} = {{self.signal("PRDATA", child, f"{child.inst_name.lower()}_idx")}};
{{self.signal("PREADY")}} = {{self.signal("PREADY", child, f"{child.inst_name.lower()}_idx")}};
{{self.signal("PSLVERR")}} = {{self.signal("PSLVERR", child, f"{child.inst_name.lower()}_idx")}};
end
{%- else -%}
{{self.signal("PRDATA")}} = {{self.signal("PRDATA", child)}};
{{self.signal("PREADY")}} = {{self.signal("PREADY", child)}};
{{self.signal("PSLVERR")}} = {{self.signal("PSLVERR", child)}};
{%- endif -%}
{%- if loop.last -%}
end else begin
// No address matched
{{self.signal("PRDATA")}} = {'hdeadbeef}[{{ds.data_width - 1}}:0]; // Indicate error on no match
{{self.signal("PSLVERR")}} = 1'b1; // Indicate error on no match
end
{%- endif -%}
{%- endfor -%}
end else begin
// Not a read transfer, nothing to do
end
end
{%- endfor -%}