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Removed UncachedAccess

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This commit is contained in:
David Harris 2022-08-25 18:20:52 -07:00
parent 7801ed48b3
commit db7698202d
1 changed files with 6 additions and 9 deletions
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15
pipelined/src/lsu/busfsm.sv
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@ -55,7 +55,6 @@ module busfsm #(parameter integer LOGWPL)
logic UnCachedBusRead;
logic UnCachedBusWrite;
logic WordCountFlag;
logic UnCachedAccess;
logic [2:0] LocalBurstType;
@ -72,8 +71,6 @@ module busfsm #(parameter integer LOGWPL)
assign WordCountFlag = 1; // Detect when we are waiting on the final access.
assign UnCachedAccess = 1;
always_ff @(posedge clk)
if (reset) BusCurrState <= #1 STATE_BUS_READY;
else BusCurrState <= #1 BusNextState;
@ -81,8 +78,8 @@ module busfsm #(parameter integer LOGWPL)
always_comb begin
case(BusCurrState)
STATE_BUS_READY: if(IgnoreRequest) BusNextState = STATE_BUS_READY;
else if(RW[0] & UnCachedAccess) BusNextState = STATE_BUS_UNCACHED_WRITE;
else if(RW[1] & UnCachedAccess) BusNextState = STATE_BUS_UNCACHED_READ;
else if(RW[0]) BusNextState = STATE_BUS_UNCACHED_WRITE;
else if(RW[1]) BusNextState = STATE_BUS_UNCACHED_READ;
else BusNextState = STATE_BUS_READY;
STATE_BUS_UNCACHED_WRITE: if(BusAck) BusNextState = STATE_BUS_UNCACHED_WRITE_DONE;
else BusNextState = STATE_BUS_UNCACHED_WRITE;
@ -105,16 +102,16 @@ module busfsm #(parameter integer LOGWPL)
// Use SEQ if not doing first word, NONSEQ if doing the first read/write, and IDLE if finishing up.
assign HTRANS = (BusRead | BusWrite) & (~BusTransComplete) ? AHB_NONSEQ : AHB_IDLE;
assign BusStall = (BusCurrState == STATE_BUS_READY & ~IgnoreRequest & ((UnCachedAccess & (|RW)))) |
assign BusStall = (BusCurrState == STATE_BUS_READY & ~IgnoreRequest & |RW) |
(BusCurrState == STATE_BUS_UNCACHED_WRITE) |
(BusCurrState == STATE_BUS_UNCACHED_READ);
assign UnCachedBusWrite = (BusCurrState == STATE_BUS_READY & UnCachedAccess & RW[0] & ~IgnoreRequest) |
assign UnCachedBusWrite = (BusCurrState == STATE_BUS_READY & RW[0] & ~IgnoreRequest) |
(BusCurrState == STATE_BUS_UNCACHED_WRITE);
assign BusWrite = UnCachedBusWrite;
assign SelBusWord = (BusCurrState == STATE_BUS_READY & UnCachedAccess & RW[0]) |
assign SelBusWord = (BusCurrState == STATE_BUS_READY & RW[0]) |
(BusCurrState == STATE_BUS_UNCACHED_WRITE);
assign UnCachedBusRead = (BusCurrState == STATE_BUS_READY & UnCachedAccess & RW[1] & ~IgnoreRequest) |
assign UnCachedBusRead = (BusCurrState == STATE_BUS_READY & RW[1] & ~IgnoreRequest) |
(BusCurrState == STATE_BUS_UNCACHED_READ);
assign BusRead = UnCachedBusRead;
assign BufferCaptureEn = UnCachedBusRead;