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54 lines
1.6 KiB
54 lines
1.6 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* arch/arm/mach-ixp4xx/include/mach/cpu.h |
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* |
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* IXP4XX cpu type detection |
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* |
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* Copyright (C) 2007 MontaVista Software, Inc. |
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*/ |
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#ifndef __ASM_ARCH_CPU_H__ |
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#define __ASM_ARCH_CPU_H__ |
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#include <linux/io.h> |
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#include <asm/cputype.h> |
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/* Processor id value in CP15 Register 0 */ |
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#define IXP42X_PROCESSOR_ID_VALUE 0x690541c0 /* including unused 0x690541Ex */ |
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#define IXP42X_PROCESSOR_ID_MASK 0xffffffc0 |
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#define IXP43X_PROCESSOR_ID_VALUE 0x69054040 |
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#define IXP43X_PROCESSOR_ID_MASK 0xfffffff0 |
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#define IXP46X_PROCESSOR_ID_VALUE 0x69054200 /* including IXP455 */ |
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#define IXP46X_PROCESSOR_ID_MASK 0xfffffff0 |
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#define cpu_is_ixp42x_rev_a0() ((read_cpuid_id() & (IXP42X_PROCESSOR_ID_MASK | 0xF)) == \ |
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IXP42X_PROCESSOR_ID_VALUE) |
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#define cpu_is_ixp42x() ((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \ |
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IXP42X_PROCESSOR_ID_VALUE) |
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#define cpu_is_ixp43x() ((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \ |
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IXP43X_PROCESSOR_ID_VALUE) |
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#define cpu_is_ixp46x() ((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \ |
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IXP46X_PROCESSOR_ID_VALUE) |
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static inline u32 ixp4xx_read_feature_bits(void) |
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{ |
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u32 val = ~__raw_readl(IXP4XX_EXP_CFG2); |
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if (cpu_is_ixp42x_rev_a0()) |
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return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP | |
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IXP4XX_FEATURE_AES); |
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if (cpu_is_ixp42x()) |
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return val & IXP42X_FEATURE_MASK; |
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if (cpu_is_ixp43x()) |
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return val & IXP43X_FEATURE_MASK; |
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return val & IXP46X_FEATURE_MASK; |
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} |
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static inline void ixp4xx_write_feature_bits(u32 value) |
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{ |
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__raw_writel(~value, IXP4XX_EXP_CFG2); |
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} |
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#endif /* _ASM_ARCH_CPU_H */
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