| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame^] | 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 | extern unsigned int processor_id; |
| 18 | /* Processor id value in CP15 Register 0 */ |
| 19 | #define IXP425_PROCESSOR_ID_VALUE 0x690541c0 |
| 20 | #define IXP435_PROCESSOR_ID_VALUE 0x69054040 |
| 21 | #define IXP465_PROCESSOR_ID_VALUE 0x69054200 |
| 22 | #define IXP4XX_PROCESSOR_ID_MASK 0xfffffff0 |
| 23 | |
| 24 | #define cpu_is_ixp42x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \ |
| 25 | IXP425_PROCESSOR_ID_VALUE) |
| 26 | #define cpu_is_ixp43x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \ |
| 27 | IXP435_PROCESSOR_ID_VALUE) |
| 28 | #define cpu_is_ixp46x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \ |
| 29 | IXP465_PROCESSOR_ID_VALUE) |
| 30 | |
| 31 | static inline u32 ixp4xx_read_feature_bits(void) |
| 32 | { |
| 33 | unsigned int val = ~*IXP4XX_EXP_CFG2; |
| 34 | val &= ~IXP4XX_FEATURE_RESERVED; |
| 35 | if (!cpu_is_ixp46x()) |
| 36 | val &= ~IXP4XX_FEATURE_IXP46X_ONLY; |
| 37 | |
| 38 | return val; |
| 39 | } |
| 40 | |
| 41 | static inline void ixp4xx_write_feature_bits(u32 value) |
| 42 | { |
| 43 | *IXP4XX_EXP_CFG2 = ~value; |
| 44 | } |
| 45 | |
| 46 | #endif /* _ASM_ARCH_CPU_H */ |