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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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//
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// CVS Revision History
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// CVS Revision History
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//
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//
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// $Log: not supported by cvs2svn $
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// $Log: not supported by cvs2svn $
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// Revision 1.5 2002/07/14 22:17:17 lampret
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// Added simple trace buffer [only for Xilinx Virtex target]. Fixed instruction fetch abort when new exception is recognized.
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//
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// Revision 1.4 2002/03/29 15:16:55 lampret
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// Revision 1.4 2002/03/29 15:16:55 lampret
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// Some of the warnings fixed.
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// Some of the warnings fixed.
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//
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//
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// Revision 1.3 2002/01/28 01:16:00 lampret
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// Revision 1.3 2002/01/28 01:16:00 lampret
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// Changed 'void' nop-ops instead of insn[0] to use insn[16]. Debug unit stalls the tick timer. Prepared new flag generation for add and and insns. Blocked DC/IC while they are turned off. Fixed I/D MMU SPRs layout except WAYs. TODO: smart IC invalidate, l.j 2 and TLB ways.
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// Changed 'void' nop-ops instead of insn[0] to use insn[16]. Debug unit stalls the tick timer. Prepared new flag generation for add and and insns. Blocked DC/IC while they are turned off. Fixed I/D MMU SPRs layout except WAYs. TODO: smart IC invalidate, l.j 2 and TLB ways.
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// This way NOP is asserted from stage ID into EX stage.
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// This way NOP is asserted from stage ID into EX stage.
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//
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//
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assign genpc_freeze = du_stall | flushpipe_r;
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assign genpc_freeze = du_stall | flushpipe_r;
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assign if_freeze = id_freeze | extend_flush;
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assign if_freeze = id_freeze | extend_flush;
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//assign id_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze | force_dslot_fetch) & ~flushpipe | du_stall;
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//assign id_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze | force_dslot_fetch) & ~flushpipe | du_stall;
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assign id_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze | force_dslot_fetch) | du_stall;
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assign id_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze | force_dslot_fetch) | du_stall | mac_stall;
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assign ex_freeze = wb_freeze;
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assign ex_freeze = wb_freeze;
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//assign wb_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze) & ~flushpipe | du_stall | mac_stall;
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//assign wb_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze) & ~flushpipe | du_stall | mac_stall;
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assign wb_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze) | du_stall | mac_stall | abort_ex;
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assign wb_freeze = (lsu_stall | (~lsu_unstall & if_stall) | multicycle_freeze) | du_stall | mac_stall | abort_ex;
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//
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//
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