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/*
* 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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