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 <linux/io.h> 18 #include <asm/cputype.h> 19 20 /* Processor id value in CP15 Register 0 */ 21 #define IXP42X_PROCESSOR_ID_VALUE 0x690541c0 /* including unused 0x690541Ex */ 22 #define IXP42X_PROCESSOR_ID_MASK 0xffffffc0 23 24 #define IXP43X_PROCESSOR_ID_VALUE 0x69054040 25 #define IXP43X_PROCESSOR_ID_MASK 0xfffffff0 26 27 #define IXP46X_PROCESSOR_ID_VALUE 0x69054200 /* including IXP455 */ 28 #define IXP46X_PROCESSOR_ID_MASK 0xfffffff0 29 30 #define cpu_is_ixp42x_rev_a0() ((read_cpuid_id() & (IXP42X_PROCESSOR_ID_MASK | 0xF)) == \ 31 IXP42X_PROCESSOR_ID_VALUE) 32 #define cpu_is_ixp42x() ((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \ 33 IXP42X_PROCESSOR_ID_VALUE) 34 #define cpu_is_ixp43x() ((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \ 35 IXP43X_PROCESSOR_ID_VALUE) 36 #define cpu_is_ixp46x() ((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \ 37 IXP46X_PROCESSOR_ID_VALUE) 38 ixp4xx_read_feature_bits(void)39static inline u32 ixp4xx_read_feature_bits(void) 40 { 41 u32 val = ~__raw_readl(IXP4XX_EXP_CFG2); 42 43 if (cpu_is_ixp42x_rev_a0()) 44 return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP | 45 IXP4XX_FEATURE_AES); 46 if (cpu_is_ixp42x()) 47 return val & IXP42X_FEATURE_MASK; 48 if (cpu_is_ixp43x()) 49 return val & IXP43X_FEATURE_MASK; 50 return val & IXP46X_FEATURE_MASK; 51 } 52 ixp4xx_write_feature_bits(u32 value)53static inline void ixp4xx_write_feature_bits(u32 value) 54 { 55 __raw_writel(~value, IXP4XX_EXP_CFG2); 56 } 57 58 #endif /* _ASM_ARCH_CPU_H */ 59
