我最近更新了我的一个大型项目的Chisel版本,从3.1.1升级到3.4.0;但是,我得到了一堆firrtl.passes.CheckHighFormLike$DefnameDifferentPortsException
firrtl.passes.CheckHighFormLike$DefnameDifferentPortsException: : ports of extmodule XilinxSimpleDualPortNoChangeBRAM with defname XilinxSimpleDualPortNoChangeBRAM are different for an extmodule with the same defname
firrtl.passes.CheckHighFormLike$DefnameDifferentPortsException: : ports of extmodule XilinxSimpleDualPortNoChangeBRAM_1 with defname XilinxSimpleDualPortNoChangeBRAM are different for an extmodule with the same defname
// and so on 241 times
下面是XilinxSimpleDualPortNoChangeBRAM的定义及其依赖关系:
class XilinxSimpleDualPortNoChangeBRAM(width: Int,
depth: Int,
performance: String="HIGH_PERFORMANCE",
initFile: String="",
ramStyle: String="block",
val useReset: Boolean=false)
extends BlackBox(Map("RAM_WIDTH" -> width,
"RAM_DEPTH" -> depth,
"RAM_PERFORMANCE" -> performance,
"INIT_FILE" -> initFile,
"RAM_STYLE" -> ramStyle))
with HasBlackBoxResource with Memory {
val io = IO(new XilinxSimpleDualPortBRAMBlackBoxIO(log2Ceil(depth), width))
val acceptedRamStyles = Seq("block", "distributed", "registers", "ultra")
require(acceptedRamStyles contains ramStyle)
def write(wrAddr: UInt, wrData: UInt, wrEn: Bool): Unit = {
io.wea := wrEn
io.addra := wrAddr
io.dina := wrData
}
def read(rdAddr: UInt, rdEn: Bool): UInt = {
io.addrb := rdAddr
io.regceb := rdEn
io.enb := rdEn
io.doutb
}
def defaultBindings(clock: Clock, reset: core.Reset): Unit = {
io.clock := clock
if(useReset)
io.reset := reset
else
io.reset := false.B
}
setResource("/XilinxSimpleDualPortNoChangeBRAM.v")
}
trait Memory extends BaseModule {
def read(rdAddr: UInt, rdEn: Bool): UInt
def write(wrAddr: UInt, wrData: UInt, wrEn: Bool): Unit
val latency: Int = 2
}
class XilinxSimpleDualPortBRAMIO(addrWidth: Int, dataWidth: Int) extends Bundle {
val addra = Input(UInt(addrWidth.W))
val addrb = Input(UInt(addrWidth.W))
val dina = Input(UInt(dataWidth.W))
val wea = Input(Bool())
val enb = Input(Bool())
val regceb = Input(Bool())
val doutb = Output(UInt(dataWidth.W))
override def cloneType = (new XilinxSimpleDualPortBRAMIO(addrWidth, dataWidth)).asInstanceOf[this.type]
}
class XilinxSimpleDualPortBRAMBlackBoxIO(addrWidth: Int, dataWidth: Int) extends XilinxSimpleDualPortBRAMIO(addrWidth, dataWidth) {
val clock = Input(Clock())
val reset = Input(Reset())
override def cloneType = (new XilinxSimpleDualPortBRAMBlackBoxIO(addrWidth, dataWidth)).asInstanceOf[this.type]
}
Verilog资源XilinxSimpleDualPortNoChangeBRAM.v
是Vivado中可用的BRAM实例化模板之一:
module XilinxSimpleDualPortNoChangeBRAM #(
parameter RAM_WIDTH = 64, // Specify RAM data width
parameter RAM_DEPTH = 512, // Specify RAM depth (number of entries)
parameter RAM_PERFORMANCE = "HIGH_PERFORMANCE", // Select "HIGH_PERFORMANCE" or "LOW_LATENCY"
parameter INIT_FILE = "", // Specify name/location of RAM initialization file if using one (leave blank if not)
parameter RAM_STYLE = "block" // Target memory type. Accepted values: block, distributed, registers, ultra (UltraScale+ only)
) (
input [clogb2(RAM_DEPTH-1)-1:0] addra, // Write address bus, width determined from RAM_DEPTH
input [clogb2(RAM_DEPTH-1)-1:0] addrb, // Read address bus, width determined from RAM_DEPTH
input [RAM_WIDTH-1:0] dina, // RAM input data
input wea, // Write enable
input enb, // Read Enable, for additional power savings, disable when not in use
input regceb, // Output register enable
output [RAM_WIDTH-1:0] doutb, // RAM output data
input clock, // Clock
input reset // Output reset (does not affect memory contents)
);
(* ram_style = RAM_STYLE *) reg [RAM_WIDTH-1:0] BRAM [RAM_DEPTH-1:0];
reg [RAM_WIDTH-1:0] ram_data = {RAM_WIDTH{1'b0}};
// The following code either initializes the memory values to a specified file or to all zeros to match hardware
generate
if (INIT_FILE != "") begin: use_init_file
initial
$readmemh(INIT_FILE, BRAM, 0, RAM_DEPTH-1);
end else begin: init_bram_to_zero
integer ram_index;
initial
for (ram_index = 0; ram_index < RAM_DEPTH; ram_index = ram_index + 1)
BRAM[ram_index] = {RAM_WIDTH{1'b0}};
end
endgenerate
always @(posedge clock) begin
if (wea)
BRAM[addra] <= dina;
if (enb)
ram_data <= BRAM[addrb];
end
// The following code generates HIGH_PERFORMANCE (use output register) or LOW_LATENCY (no output register)
generate
if (RAM_PERFORMANCE == "LOW_LATENCY") begin: no_output_register
// The following is a 1 clock cycle read latency at the cost of a longer clock-to-out timing
assign doutb = ram_data;
end else begin: output_register
// The following is a 2 clock cycle read latency with improve clock-to-out timing
reg [RAM_WIDTH-1:0] doutb_reg = {RAM_WIDTH{1'b0}};
always @(posedge clock)
if (reset)
doutb_reg <= {RAM_WIDTH{1'b0}};
else if (regceb)
doutb_reg <= ram_data;
assign doutb = doutb_reg;
end
endgenerate
// The following function calculates the address width based on specified RAM depth
function integer clogb2;
input integer depth;
for (clogb2=0; depth>0; clogb2=clogb2+1)
depth = depth >> 1;
endfunction
endmodule
我试图查看抛出此异常的文件,CheckHighForm.scala
,但是我很快就迷路了,因为我不知道应该寻找什么。
我从CheckSpec.scala
中的测试中了解到,它应该是throw an exception if ExtModules have matching port names and widths, but a different order
,所以我试图使Chisel BlackBox中的输入顺序与Verilog模块中的输入顺序相同,但我仍然得到了一个异常。
测试throw an exception if parameterless ExtModules have the same ports, but different widths
使我认为具有不同端口宽度的多个实例化可能是异常的原因,但是还有另一个测试表明它应该NOT throw an exception if ExtModules have parameters, matching port names, but different widths
,这是因为端口宽度是由参数控制的。
这一例外的原因是什么?
更新:根据请求,这是黑匣子的两个实例化的FIRRTL IR:
extmodule XilinxSimpleDualPortNoChangeBRAM :
input addra : UInt<14>
input addrb : UInt<14>
input dina : UInt<1>
input wea : UInt<1>
input enb : UInt<1>
input regceb : UInt<1>
output doutb : UInt<1>
input clock : Clock
input reset : Reset
defname = XilinxSimpleDualPortNoChangeBRAM
parameter RAM_STYLE = "block"
parameter RAM_WIDTH = 1
parameter RAM_DEPTH = 16384
parameter RAM_PERFORMANCE = "HIGH_PERFORMANCE"
parameter INIT_FILE = ""
extmodule XilinxSimpleDualPortNoChangeBRAM_1 :
input addra : UInt<6>
input addrb : UInt<6>
input dina : UInt<518>
input wea : UInt<1>
input enb : UInt<1>
input regceb : UInt<1>
output doutb : UInt<518>
input clock : Clock
input reset : Reset
defname = XilinxSimpleDualPortNoChangeBRAM
parameter RAM_STYLE = "distributed"
parameter RAM_WIDTH = 518
parameter RAM_DEPTH = 64
parameter RAM_PERFORMANCE = "HIGH_PERFORMANCE"
parameter INIT_FILE = ""
更新2:很明显,一些XilinxSimpleDualPortNoChangeBRAM
正在选择一个较旧版本的XilinxSimpleDualPortBRAMBlackBoxIO
,其中重置仍然是Bool
类型而不是Reset
类型。改变它解决了这个问题。
发布于 2020-10-20 06:29:22
当引用特定的BlackBox时,这种检查应该不允许出现不可能的情况。也就是说,以下情况必须是正确的:
如果
听起来,您的示例要么生成违反后一个条件的BlackBoxes (因为您的BlackBoxes有参数),要么在FIRRTL编译器检查中暴露了一个错误。
实际的Verilog模块从未被检查过,在这里也不会造成任何问题。
您能否更新您的问题,以提供产生这些错误的FIRRTL IR?具体来说,用于XilinxSimpleDualPortNoChangeBRAM
和XilinxSimpleDualPortNoChangeBRAM_1
的FIRRTL是什么样子的?这应该在像"Foo.fir“这样的文件中。或者,您也可以这样做:
import chisel3.stage.ChiselStage
/* Note: this is emitChirrtl ("chirrtl") as you want the FIRRTL emitted from Chisel. */
println(ChiselStage.emitChirrtl(new MyTopModule))
https://stackoverflow.com/questions/64440617
复制