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Simplified CMO.Zero fsm implementation slightly.

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This commit is contained in:
Rose Thompson 2023-11-20 17:01:43 -06:00
parent eed6f11df6
commit 667fe035c0
1 changed files with 2 additions and 2 deletions
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4
src/cache/cachefsm.sv vendored
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@ -136,7 +136,7 @@ module cachefsm import cvw::*; #(parameter cvw_t P,
else NextState = STATE_READY; else NextState = STATE_READY;
// exclusion-tag-start: icache case // exclusion-tag-start: icache case
STATE_WRITEBACK: if(CacheBusAck & ~CMOp[3]) NextState = STATE_FETCH; STATE_WRITEBACK: if(CacheBusAck & ~CMOp[3]) NextState = STATE_FETCH;
else if(CacheBusAck) NextState = STATE_CMO_DONE; else if(CacheBusAck) NextState = STATE_READ_HOLD;
else NextState = STATE_WRITEBACK; else NextState = STATE_WRITEBACK;
// eviction needs a delay as the bus fsm does not correctly handle sending the write command at the same time as getting back the bus ack. // eviction needs a delay as the bus fsm does not correctly handle sending the write command at the same time as getting back the bus ack.
STATE_FLUSH: if(LineDirty) NextState = STATE_FLUSH_WRITEBACK; STATE_FLUSH: if(LineDirty) NextState = STATE_FLUSH_WRITEBACK;
@ -146,7 +146,7 @@ module cachefsm import cvw::*; #(parameter cvw_t P,
else if(CacheBusAck) NextState = STATE_READ_HOLD; else if(CacheBusAck) NextState = STATE_READ_HOLD;
else NextState = STATE_FLUSH_WRITEBACK; else NextState = STATE_FLUSH_WRITEBACK;
STATE_CMO_WRITEBACK: if(CacheBusAck & (CMOp[1] | CMOp[2])) NextState = STATE_CMO_DONE; STATE_CMO_WRITEBACK: if(CacheBusAck & (CMOp[1] | CMOp[2])) NextState = STATE_READ_HOLD;
else NextState = STATE_CMO_WRITEBACK; else NextState = STATE_CMO_WRITEBACK;
STATE_CMO_DONE: if(Stall) NextState = STATE_CMO_DONE; STATE_CMO_DONE: if(Stall) NextState = STATE_CMO_DONE;
else NextState = STATE_READY; else NextState = STATE_READY;