2007-11-26 12:42:19 -07:00
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#ifndef _ASM_X86_ACPI_H
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#define _ASM_X86_ACPI_H
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2007-10-11 03:20:03 -06:00
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#ifdef CONFIG_X86_32
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# include "acpi_32.h"
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#else
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# include "acpi_64.h"
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#endif
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2007-11-26 12:42:19 -07:00
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#include <asm/processor.h>
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/*
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* Check if the CPU can handle C2 and deeper
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*/
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static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
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{
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/*
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* Early models (<=5) of AMD Opterons are not supposed to go into
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* C2 state.
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*
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* Steppings 0x0A and later are good
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*/
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if (boot_cpu_data.x86 == 0x0F &&
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boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
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boot_cpu_data.x86_model <= 0x05 &&
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boot_cpu_data.x86_mask < 0x0A)
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return 1;
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else
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return max_cstate;
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}
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#endif
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