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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__
#include <linux/io.h>
#include <asm/cputype.h>
/* Processor id value in CP15 Register 0 */
#define IXP42X_PROCESSOR_ID_VALUE 0x690541c0 /* including unused 0x690541Ex */
#define IXP42X_PROCESSOR_ID_MASK 0xffffffc0
#define IXP43X_PROCESSOR_ID_VALUE 0x69054040
#define IXP43X_PROCESSOR_ID_MASK 0xfffffff0
#define IXP46X_PROCESSOR_ID_VALUE 0x69054200 /* including IXP455 */
#define IXP46X_PROCESSOR_ID_MASK 0xfffffff0
#define cpu_is_ixp42x_rev_a0() ((read_cpuid_id() & (IXP42X_PROCESSOR_ID_MASK | 0xF)) == \
IXP42X_PROCESSOR_ID_VALUE)
#define cpu_is_ixp42x() ((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \
IXP42X_PROCESSOR_ID_VALUE)
#define cpu_is_ixp43x() ((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \
IXP43X_PROCESSOR_ID_VALUE)
#define cpu_is_ixp46x() ((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \
IXP46X_PROCESSOR_ID_VALUE)
static inline u32 ixp4xx_read_feature_bits(void)
{
u32 val = ~__raw_readl(IXP4XX_EXP_CFG2);
if (cpu_is_ixp42x_rev_a0())
return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP |
IXP4XX_FEATURE_AES);
if (cpu_is_ixp42x())
return val & IXP42X_FEATURE_MASK;
if (cpu_is_ixp43x())
return val & IXP43X_FEATURE_MASK;
return val & IXP46X_FEATURE_MASK;
}
static inline void ixp4xx_write_feature_bits(u32 value)
{
__raw_writel(~value, IXP4XX_EXP_CFG2);
}
#endif /* _ASM_ARCH_CPU_H */