1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * arch/arm/mach-ixp4xx/include/mach/cpu.h 4 * 5 * IXP4XX cpu type detection 6 * 7 * Copyright (C) 2007 MontaVista Software, Inc. 8 */ 9 10 #ifndef __ASM_ARCH_CPU_H__ 11 #define __ASM_ARCH_CPU_H__ 12 13 #include <linux/io.h> 14 #include <asm/cputype.h> 15 16 /* Processor id value in CP15 Register 0 */ 17 #define IXP42X_PROCESSOR_ID_VALUE 0x690541c0 /* including unused 0x690541Ex */ 18 #define IXP42X_PROCESSOR_ID_MASK 0xffffffc0 19 20 #define IXP43X_PROCESSOR_ID_VALUE 0x69054040 21 #define IXP43X_PROCESSOR_ID_MASK 0xfffffff0 22 23 #define IXP46X_PROCESSOR_ID_VALUE 0x69054200 /* including IXP455 */ 24 #define IXP46X_PROCESSOR_ID_MASK 0xfffffff0 25 26 #define cpu_is_ixp42x_rev_a0() ((read_cpuid_id() & (IXP42X_PROCESSOR_ID_MASK | 0xF)) == \ 27 IXP42X_PROCESSOR_ID_VALUE) 28 #define cpu_is_ixp42x() ((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \ 29 IXP42X_PROCESSOR_ID_VALUE) 30 #define cpu_is_ixp43x() ((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \ 31 IXP43X_PROCESSOR_ID_VALUE) 32 #define cpu_is_ixp46x() ((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \ 33 IXP46X_PROCESSOR_ID_VALUE) 34 ixp4xx_read_feature_bits(void)35static inline u32 ixp4xx_read_feature_bits(void) 36 { 37 u32 val = ~__raw_readl(IXP4XX_EXP_CFG2); 38 39 if (cpu_is_ixp42x_rev_a0()) 40 return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP | 41 IXP4XX_FEATURE_AES); 42 if (cpu_is_ixp42x()) 43 return val & IXP42X_FEATURE_MASK; 44 if (cpu_is_ixp43x()) 45 return val & IXP43X_FEATURE_MASK; 46 return val & IXP46X_FEATURE_MASK; 47 } 48 ixp4xx_write_feature_bits(u32 value)49static inline void ixp4xx_write_feature_bits(u32 value) 50 { 51 __raw_writel(~value, IXP4XX_EXP_CFG2); 52 } 53 54 #endif /* _ASM_ARCH_CPU_H */ 55