2 * arch/arm/mach-ixp4xx/include/mach/cpu.h
4 * IXP4XX cpu type detection
6 * Copyright (C) 2007 MontaVista Software, Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
14 #ifndef __ASM_ARCH_CPU_H__
15 #define __ASM_ARCH_CPU_H__
17 #include <asm/cputype.h>
19 /* Processor id value in CP15 Register 0 */
20 #define IXP42X_PROCESSOR_ID_VALUE 0x690541c0 /* including unused 0x690541Ex */
21 #define IXP42X_PROCESSOR_ID_MASK 0xffffffc0
23 #define IXP43X_PROCESSOR_ID_VALUE 0x69054040
24 #define IXP43X_PROCESSOR_ID_MASK 0xfffffff0
26 #define IXP46X_PROCESSOR_ID_VALUE 0x69054200 /* including IXP455 */
27 #define IXP46X_PROCESSOR_ID_MASK 0xfffffff0
29 #define cpu_is_ixp42x() ((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \
30 IXP42X_PROCESSOR_ID_VALUE)
31 #define cpu_is_ixp43x() ((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \
32 IXP43X_PROCESSOR_ID_VALUE)
33 #define cpu_is_ixp46x() ((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \
34 IXP46X_PROCESSOR_ID_VALUE)
36 static inline u32 ixp4xx_read_feature_bits(void)
38 unsigned int val = ~*IXP4XX_EXP_CFG2;
41 return val & IXP42X_FEATURE_MASK;
43 return val & IXP43X_FEATURE_MASK;
44 return val & IXP46X_FEATURE_MASK;
47 static inline void ixp4xx_write_feature_bits(u32 value)
49 *IXP4XX_EXP_CFG2 = ~value;
52 #endif /* _ASM_ARCH_CPU_H */