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From: cvs at opencores.org<cvs@o...>
Date: Thu Dec 20 11:46:55 CET 2007
Subject: [cvs-checkins] MODIFIED: jop ...
Date: 00/07/12 20:11:46

Modified: jop/vhdl/scio cmpsync.vhd
Log:
no message


Revision Changes Path
1.5 jop/vhdl/scio/cmpsync.vhd

http://www.opencores.org/cvsweb.shtml/jop/vhdl/scio/cmpsync.vhd.diff?r1=1.4&r2=1.5

(In the diff below, changes in quantity of whitespace are not shown.)

Index: cmpsync.vhd
===================================================================
RCS file: /cvsroot/9914pich/jop/vhdl/scio/cmpsync.vhd,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -b -r1.4 -r1.5
--- cmpsync.vhd 14 Dec 2007 14:38:11 -0000 1.4
+++ cmpsync.vhd 20 Dec 2007 10:46:55 -0000 1.5
@@ -5,6 +5,8 @@
--
-- 2007-11-22 Global lock synchronization and bootup of CMP
-- 2007-12-07 redesign of global lock synchronization
+-- 2007-12-19 included new lock arbitration in state "locked".
+-- Otherwise wrong output if two CPUs are waiting for lock!


library ieee;
@@ -61,6 +63,15 @@
if sync_in_array(locked_id).lock_req = '0' then
next_state <= idle;
next_locked_id <= cpu_cnt;
+
+ -- new lock request
+ for i in 0 to cpu_cnt-1 loop
+ if sync_in_array(i).lock_req = '1' then
+ next_state <= locked;
+ next_locked_id <= i;
+ exit;
+ end if;
+ end loop;
end if;
end case;
end process;