/* pm.c -- Simulation of OpenRISC 1000 power management
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/* pm.c -- Simulation of OpenRISC 1000 power management
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Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
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Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This is functional simulation of OpenRISC 1000 architectural
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/* This is functional simulation of OpenRISC 1000 architectural
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power management.
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power management.
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*/
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*/
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#include <stdlib.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <string.h>
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#include <string.h>
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#include "pm.h"
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#include "pm.h"
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#include "spr_defs.h"
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#include "spr_defs.h"
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#include "sprs.h"
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extern int cont_run;
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extern int cont_run;
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/* Reset. It initializes PMR register. */
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/* Reset. It initializes PMR register. */
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void pm_reset()
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void pm_reset()
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{
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{
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printf("Resetting Power Management.\n");
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printf("Resetting Power Management.\n");
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mtspr(SPR_PMR, 0);
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mtspr(SPR_PMR, 0);
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}
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}
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/* Simulation hook. Must be called every clock cycle to simulate PM
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/* Simulation hook. Must be called every clock cycle to simulate PM
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It does internal functional power management simulation. */
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It does internal functional power management simulation. */
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void pm_clock()
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void pm_clock()
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{
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{
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unsigned long pmr;
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unsigned long pmr;
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pmr = mfspr(SPR_PMR);
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pmr = mfspr(SPR_PMR);
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/* PMR[SDF] and PMR[DCGE] are ignored completely. */
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/* PMR[SDF] and PMR[DCGE] are ignored completely. */
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if (pmr & SPR_PMR_SUME) {
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if (pmr & SPR_PMR_SUME) {
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printf("SUSPEND: PMR[SUME] bit was set.\n");
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printf("SUSPEND: PMR[SUME] bit was set.\n");
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cont_run = 0;
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cont_run = 0;
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}
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}
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}
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}
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