Initial commit of OpenSPARC T2 design and verification files.

[OpenSPARC-T2-DV] / verif / env / niu / rxc_sat / vera / checkers / mem_checker / niu_rxcbmgr.vr

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// 
// OpenSPARC T2 Processor File: niu_rxcbmgr.vr
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#include <vera_defines.vrh>
#include "niu_mem.vrh"
#include "niu_rx_descp.vrh"
#include "niu_rxtoken.vrh"
#include "niu_cbclass.vrh"



// this class is to manage the callbacks to the memory based upon the
// token content


class CcbRxWriteMgr {

   integer max_cbs;
   integer max_goodcbs;
   integer max_dropcbs;
   integer startSemId;
   integer dropSemId;
   integer good_packetactive_cbs;
   integer drop_packetactive_cbs;
   integer GoodsemIdTab[];
   integer DropsemIdTab[];

   bit [63:0] address[];

   task new( (integer i =0 )) {
      integer j;
      max_cbs = i;

      if(i!=0) {
      max_dropcbs = 2; // TMP?
      max_goodcbs = max_cbs - max_dropcbs;
      } else {
      max_dropcbs = 0;
      max_goodcbs = 0;
      }

      good_packetactive_cbs = 0;
      drop_packetactive_cbs = 0;
      for( j=0;j<max_cbs; j ++) {
        GoodsemIdTab[j] = 0;
        DropsemIdTab[j] = 0;
      }

    

      startSemId = alloc(SEMAPHORE,0,max_cbs,0);
      dropSemId = alloc(SEMAPHORE,0,1,0);
      
   }
   function integer isAvailable() ;
   function integer getgoodpktSemId( bit [63:0] a, ( integer MAX_TIMEOUT = 5000) ) ;
   task releaseSemId(integer semId);
   function integer getdroppktSemId();

}


function integer CcbRxWriteMgr::isAvailable() {

  if( ( good_packetactive_cbs + drop_packetactive_cbs) == max_cbs)
     isAvailable = 0;
  else isAvailable = ( max_cbs - good_packetactive_cbs - drop_packetactive_cbs);

  printf(" CcbRxWriteMgr::isAvailable - %d \n",isAvailable);

}
function integer CcbRxWriteMgr::getdroppktSemId() {
  getdroppktSemId = dropSemId;
}


function integer CcbRxWriteMgr::getgoodpktSemId( bit [63:0] a, (integer MAX_TIMEOUT = 5000)) {

integer i;
integer id;
integer done;
 i = 0;
 done = 0;
 id = 0;
 while( (i<max_cbs) & (done==0)) {
  printf(" in getgoodpktSemId i = %d , GoodsemIdTab - %d \n",i,GoodsemIdTab[i ]);
  if(GoodsemIdTab[i ] ==0) { // ie free
    getgoodpktSemId =  startSemId + i;
    id = startSemId + i;
    good_packetactive_cbs++;
    GoodsemIdTab[i ] = 1; // Used
    done = 1;
  }
  i++;
 } 

 // error
 if((i== max_cbs) & (done==0)) {
   printf(" No more SemIds available i= %d  !! ERROR \n",i);
   getgoodpktSemId = -1;
 } else {
  address[id] = a;
  printf("CcbRxWriteMgr:: Allocated id - %d Address = %x \n",id,a); 
  //timeout(SEMAPHORE,MAX_TIMEOUT,id); //temp
 }

}

task CcbRxWriteMgr::releaseSemId(integer semId){

  integer i;
  i = semId - startSemId ;
  printf("CcbRxWriteMgr::  Releasing SemId - %d Address  = %x \n",semId,address[semId]);
  GoodsemIdTab[i] = 0;
  good_packetactive_cbs--;

}