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Named HTRANS states in busfsm

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David Harris 2022-08-22 13:56:46 -07:00
parent 24a05c35d9
commit a9a5285ba8
1 changed files with 3 additions and 1 deletions
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pipelined/src/lsu/busfsm.sv
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@ -78,6 +78,8 @@ module busfsm #(parameter integer WordCountThreshold,
STATE_BUS_UNCACHED_READ_DONE, STATE_BUS_UNCACHED_READ_DONE,
STATE_BUS_CPU_BUSY} busstatetype; STATE_BUS_CPU_BUSY} busstatetype;
typedef enum logic [1:0] {AHB_IDLE = 2'b00, AHB_BUSY = 2'b01, AHB_NONSEQ = 2'b10, AHB_SEQ = 2'b11} ahbtranstype;
(* mark_debug = "true" *) busstatetype BusCurrState, BusNextState; (* mark_debug = "true" *) busstatetype BusCurrState, BusNextState;
// Used to send address for address stage of AHB. // Used to send address for address stage of AHB.
@ -154,7 +156,7 @@ module busfsm #(parameter integer WordCountThreshold,
assign LSUBurstType = (UnCachedRW) ? 3'b0 : LocalBurstType; // Don't want to use burst when doing an Uncached Access. assign LSUBurstType = (UnCachedRW) ? 3'b0 : LocalBurstType; // Don't want to use burst when doing an Uncached Access.
assign LSUTransComplete = (UnCachedRW) ? LSUBusAck : WordCountFlag & LSUBusAck; assign LSUTransComplete = (UnCachedRW) ? LSUBusAck : WordCountFlag & LSUBusAck;
// Use SEQ if not doing first word, NONSEQ if doing the first read/write, and IDLE if finishing up. // Use SEQ if not doing first word, NONSEQ if doing the first read/write, and IDLE if finishing up.
assign LSUTransType = (|WordCount) & ~UnCachedRW ? 2'b11 : (LSUBusRead | LSUBusWrite) & (~LSUTransComplete) ? 2'b10 : 2'b00; assign LSUTransType = (|WordCount) & ~UnCachedRW ? AHB_SEQ : (LSUBusRead | LSUBusWrite) & (~LSUTransComplete) ? AHB_NONSEQ : AHB_IDLE;
// Reset if we aren't initiating a transaction or if we are finishing a transaction. // Reset if we aren't initiating a transaction or if we are finishing a transaction.
assign CntReset = BusCurrState == STATE_BUS_READY & ~(DCacheFetchLine | DCacheWriteLine) | LSUTransComplete; assign CntReset = BusCurrState == STATE_BUS_READY & ~(DCacheFetchLine | DCacheWriteLine) | LSUTransComplete;