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cpu.h

/*
 * arch/arm/mach-ixp4xx/include/mach/cpu.h
 *
 * IXP4XX cpu type detection
 *
 * Copyright (C) 2007 MontaVista Software, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#ifndef __ASM_ARCH_CPU_H__
#define __ASM_ARCH_CPU_H__

extern unsigned int processor_id;
/* Processor id value in CP15 Register 0 */
#define IXP425_PROCESSOR_ID_VALUE   0x690541c0
#define IXP435_PROCESSOR_ID_VALUE   0x69054040
#define IXP465_PROCESSOR_ID_VALUE   0x69054200
#define IXP4XX_PROCESSOR_ID_MASK    0xfffffff0

#define cpu_is_ixp42x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
                    IXP425_PROCESSOR_ID_VALUE)
#define cpu_is_ixp43x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
                    IXP435_PROCESSOR_ID_VALUE)
#define cpu_is_ixp46x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
                    IXP465_PROCESSOR_ID_VALUE)

static inline u32 ixp4xx_read_feature_bits(void)
{
      unsigned int val = ~*IXP4XX_EXP_CFG2;
      val &= ~IXP4XX_FEATURE_RESERVED;
      if (!cpu_is_ixp46x())
            val &= ~IXP4XX_FEATURE_IXP46X_ONLY;

      return val;
}

static inline void ixp4xx_write_feature_bits(u32 value)
{
      *IXP4XX_EXP_CFG2 = ~value;
}

#endif  /* _ASM_ARCH_CPU_H */

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