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05131ecc99
Linux invokes the AML _PDC method (Processor Driver Capabilities) to tell the BIOS what features it can handle. While the ACPI spec says nothing about the OS invoking _PDC multiple times, doing so with changing bits seems to hopelessly confuse the BIOS on multiple platforms up to and including crashing the system. Factor out the _PDC invocation so Linux invokes it only once. http://bugzilla.kernel.org/show_bug.cgi?id=5483 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
26 lines
690 B
C
26 lines
690 B
C
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/* _PDC bit definition for Intel processors */
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#ifndef __PDC_INTEL_H__
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#define __PDC_INTEL_H__
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#define ACPI_PDC_P_FFH (0x0001)
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#define ACPI_PDC_C_C1_HALT (0x0002)
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#define ACPI_PDC_T_FFH (0x0004)
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#define ACPI_PDC_SMP_C1PT (0x0008)
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#define ACPI_PDC_SMP_C2C3 (0x0010)
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#define ACPI_PDC_SMP_P_SWCOORD (0x0020)
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#define ACPI_PDC_SMP_C_SWCOORD (0x0040)
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#define ACPI_PDC_SMP_T_SWCOORD (0x0080)
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#define ACPI_PDC_C_C1_FFH (0x0100)
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#define ACPI_PDC_EST_CAPABILITY_SMP (ACPI_PDC_SMP_C1PT | \
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ACPI_PDC_C_C1_HALT | \
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ACPI_PDC_P_FFH)
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#define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \
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ACPI_PDC_SMP_C1PT | \
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ACPI_PDC_C_C1_HALT)
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#endif /* __PDC_INTEL_H__ */
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