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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 */
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