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Working version: Fixed error where Word count would always increment even without AHB to bus ACK

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This commit is contained in:
slmnemo 2022-06-08 15:29:32 -07:00
parent 054cf5f7b0
commit 315c2f0669
2 changed files with 3 additions and 3 deletions
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4
pipelined/src/ebu/ahblite.sv
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@ -167,8 +167,8 @@ module ahblite (
assign IFUBusHRDATA = HRDATA; assign IFUBusHRDATA = HRDATA;
assign LSUBusHRDATA = HRDATA; assign LSUBusHRDATA = HRDATA;
assign IFUBusInit = (NextBusState == INSTRREAD); assign IFUBusInit = (BusState != INSTRREAD) & (NextBusState == INSTRREAD);
assign LSUBusInit = (NextBusState == MEMREAD) | (NextBusState == MEMWRITE); assign LSUBusInit = ((BusState != MEMREAD) & (NextBusState == MEMREAD)) | (BusState == IDLE) & (NextBusState == MEMWRITE);
assign IFUBusAck = HREADY & (BusState == INSTRREAD); assign IFUBusAck = HREADY & (BusState == INSTRREAD);
assign LSUBusAck = HREADY & ((BusState == MEMREAD) | (BusState == MEMWRITE)); assign LSUBusAck = HREADY & ((BusState == MEMREAD) | (BusState == MEMWRITE));

2
pipelined/src/lsu/busfsm.sv
View File

@ -144,7 +144,7 @@ module busfsm #(parameter integer WordCountThreshold,
assign LSUBurstType = (UnCachedAccess) ? 3'b0 : LocalBurstType ; // Don't want to use burst when doing an Uncached Access. assign LSUBurstType = (UnCachedAccess) ? 3'b0 : LocalBurstType ; // Don't want to use burst when doing an Uncached Access.
assign LSUTransComplete = (UnCachedAccess) ? LSUBusAck : WordCountFlag & LSUBusAck; assign LSUTransComplete = (UnCachedAccess) ? LSUBusAck : WordCountFlag & LSUBusAck;
assign LSUTransType = (|WordCount) & ~UncachedAccess ? 2'b11 : (LSUBusRead | LSUBusWrite) & ~WordCountFlag ? 2'b10 : 2'b00; assign LSUTransType = (|WordCount) & ~UnCachedAccess ? 2'b11 : (LSUBusRead | LSUBusWrite) & ~WordCountFlag ? 2'b10 : 2'b00;
assign CntReset = BusCurrState == STATE_BUS_READY & ~(DCacheFetchLine | DCacheWriteLine); assign CntReset = BusCurrState == STATE_BUS_READY & ~(DCacheFetchLine | DCacheWriteLine);
assign BusStall = (BusCurrState == STATE_BUS_READY & ~IgnoreRequest & ((UnCachedAccess & (|LSURWM)) | DCacheFetchLine | DCacheWriteLine)) | assign BusStall = (BusCurrState == STATE_BUS_READY & ~IgnoreRequest & ((UnCachedAccess & (|LSURWM)) | DCacheFetchLine | DCacheWriteLine)) |