| /* |
| * include/asm-arm/arch-ixp4xx/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__ |
| |
| extern unsigned int processor_id; |
| /* Processor id value in CP15 Register 0 */ |
| #define IXP425_PROCESSOR_ID_VALUE 0x690541c0 |
| #define IXP435_PROCESSOR_ID_VALUE 0x69054040 |
| #define IXP465_PROCESSOR_ID_VALUE 0x69054200 |
| #define IXP4XX_PROCESSOR_ID_MASK 0xfffffff0 |
| |
| #define cpu_is_ixp42x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \ |
| IXP425_PROCESSOR_ID_VALUE) |
| #define cpu_is_ixp43x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \ |
| IXP435_PROCESSOR_ID_VALUE) |
| #define cpu_is_ixp46x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \ |
| IXP465_PROCESSOR_ID_VALUE) |
| |
| static inline u32 ixp4xx_read_feature_bits(void) |
| { |
| unsigned int val = ~*IXP4XX_EXP_CFG2; |
| val &= ~IXP4XX_FEATURE_RESERVED; |
| if (!cpu_is_ixp46x()) |
| val &= ~IXP4XX_FEATURE_IXP46X_ONLY; |
| |
| return val; |
| } |
| |
| static inline void ixp4xx_write_feature_bits(u32 value) |
| { |
| *IXP4XX_EXP_CFG2 = ~value; |
| } |
| |
| #endif /* _ASM_ARCH_CPU_H */ |
