Subversion Repositories or1k

/* pm.c -- Simulation of OpenRISC 1000 power management

   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org

This file is part of OpenRISC 1000 Architectural Simulator.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

/* This is functional simulation of OpenRISC 1000 architectural

   power management.

*/

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include "pm.h"

#include "spr_defs.h"

extern int cont_run;

/* Reset. It initializes PMR register. */

void pm_reset()

{

        printf("Resetting Power Management.\n");

        mtspr(SPR_PMR, 0);

}

/* Simulation hook. Must be called every clock cycle to simulate PM

   It does internal functional power management simulation. */

void pm_clock()

{

        unsigned long pmr;

        pmr = mfspr(SPR_PMR);

        /* PMR[SDF] and PMR[DCGE] are ignored completely. */

        if (pmr & SPR_PMR_SUME) {

                printf("SUSPEND: PMR[SUME] bit was set.\n");

                cont_run = 0;

        }

}