1 /* 2 * arch/arm/mach-ixp4xx/include/mach/cpu.h 3 * 4 * IXP4XX cpu type detection 5 * 6 * Copyright (C) 2007 MontaVista Software, Inc. 7 * 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. 11 * 12 */ 13 14 #ifndef __ASM_ARCH_CPU_H__ 15 #define __ASM_ARCH_CPU_H__ 16 17 #include <asm/cputype.h> 18 19 /* Processor id value in CP15 Register 0 */ 20 #define IXP425_PROCESSOR_ID_VALUE 0x690541c0 21 #define IXP435_PROCESSOR_ID_VALUE 0x69054040 22 #define IXP465_PROCESSOR_ID_VALUE 0x69054200 23 #define IXP4XX_PROCESSOR_ID_MASK 0xfffffff0 24 25 #define cpu_is_ixp42x() ((read_cpuid_id() & IXP4XX_PROCESSOR_ID_MASK) == \ 26 IXP425_PROCESSOR_ID_VALUE) 27 #define cpu_is_ixp43x() ((read_cpuid_id() & IXP4XX_PROCESSOR_ID_MASK) == \ 28 IXP435_PROCESSOR_ID_VALUE) 29 #define cpu_is_ixp46x() ((read_cpuid_id() & IXP4XX_PROCESSOR_ID_MASK) == \ 30 IXP465_PROCESSOR_ID_VALUE) 31 ixp4xx_read_feature_bits(void)32static inline u32 ixp4xx_read_feature_bits(void) 33 { 34 unsigned int val = ~*IXP4XX_EXP_CFG2; 35 val &= ~IXP4XX_FEATURE_RESERVED; 36 if (!cpu_is_ixp46x()) 37 val &= ~IXP4XX_FEATURE_IXP46X_ONLY; 38 39 return val; 40 } 41 ixp4xx_write_feature_bits(u32 value)42static inline void ixp4xx_write_feature_bits(u32 value) 43 { 44 *IXP4XX_EXP_CFG2 = ~value; 45 } 46 47 #endif /* _ASM_ARCH_CPU_H */ 48