[Gems-users] Removing Supervisor instructions from Opal Simulation

[ubaid001@xxxxxxx]

Hi,

I want to simulate a multi core system in Opal which executes only the User 
instructions.
The m_fetch_at data is helpful in this measure. I have pasted the code 
which i used in the fetchInstSimple() in pseq.C in Opal.
I check if the PC belongs to a supervisor instructions by this code. 

pstate_s = m_fetch_at[proc]->pstate;
priv_s = ((pstate_s & 0x4) == 0x4);

     	
if (priv_s){
	fprintf (pctrace,"--------Processor : %d--------\n",m_id);
        fprintf (pctrace,"SuperVisor Instructions fetchPhyPC : 0x%0llx\n 
",fetchPhysicalPC);

//I advance simics 

M_PSTATE->simcontinue( 1, proc );

//Am not sure abt this part. In order to prevent a squash due to 
inconsistency, //I copy the simics register to Opal .
m_fetch_at[proc]->pc  = M_PSTATE->getControl(CONTROL_PC, proc);
m_fetch_at[proc]->npc = M_PSTATE->getControl(CONTROL_NPC, proc);
m_fetch_at[proc]->tl  = M_PSTATE->getControl(CONTROL_TL, proc);
m_fetch_at[proc]->pstate = M_PSTATE->getControl( CONTROL_PSTATE, proc );
m_fetch_at[proc]->cwp = M_PSTATE->getControl(CONTROL_CWP, proc);
m_fetch_at[proc]->gset = pstate_t::getGlobalSet( m_fetch_at[proc]->pstate );
 if ( ISADDRESS32(m_fetch_at[proc]->pstate) ) {
	m_fetch_at[proc]->pc  = AM64( m_fetch_at[proc]->pc );
	m_fetch_at[proc]->npc = AM64( m_fetch_at[proc]->npc );
 }

m_ooo.at[proc] = *(m_fetch_at[proc]);
m_inorder[proc].at[proc] = *(m_fetch_at[proc]);

}



else{
  //It is a user instruction . I proceed normally. 

}





The problem is that once the processor hits a Supervisor Instructions it 
stalls at the same PC. It doesn't move on to the next instruction.It keeps 
fetching the same Supervisor Intsruction.
What am I doing wrong?

Suhail