linux-imx

/*

 * pervasive backend for the cbe_cpufreq driver

 *

 * This driver makes use of the pervasive unit to

 * engage the desired frequency.

 *

 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007

 *

 * Author: Christian Krafft <krafft@de.ibm.com>

 *

 * 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, 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.

 */

​

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/time.h>

#include <asm/machdep.h>

#include <asm/hw_irq.h>

#include <asm/cell-regs.h>

​

#include "ppc_cbe_cpufreq.h"

​

/* to write to MIC register */

static u64 MIC_Slow_Fast_Timer_table[] = {

    [0 ... 7] = 0x007fc00000000000ull,

};

​

/* more values for the MIC */

static u64 MIC_Slow_Next_Timer_table[] = {

    0x0000240000000000ull,

    0x0000268000000000ull,

    0x000029C000000000ull,

    0x00002D0000000000ull,

    0x0000300000000000ull,

    0x0000334000000000ull,

    0x000039C000000000ull,

    0x00003FC000000000ull,

};

​

​

int cbe_cpufreq_set_pmode(int cpu, unsigned int pmode)

{

    struct cbe_pmd_regs __iomem *pmd_regs;

    struct cbe_mic_tm_regs __iomem *mic_tm_regs;

    unsigned long flags;

    u64 value;

#ifdef DEBUG

    long time;

#endif

​

    local_irq_save(flags);