| /* |
| * 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 <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() ((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) |
| { |
| unsigned int val = ~*IXP4XX_EXP_CFG2; |
| |
| 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) |
| { |
| *IXP4XX_EXP_CFG2 = ~value; |
| } |
| |
| #endif /* _ASM_ARCH_CPU_H */ |