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30 lines
864 B
C
30 lines
864 B
C
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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#ifndef IOCTLCODES_H
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#define IOCTLCODES_H
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#pragma once
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// Define the IOCTL codes we will use. The IOCTL code contains a command
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// identifier, plus other information about the device, the type of access
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// with which the file must have been opened, and the type of buffering.
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// Device type -- in the "User Defined" range."
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#define DEVICE_FILE_TYPE 40000
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// The IOCTL function codes from 0x800 to 0xFFF are for customer use.
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#define IOCTL_WRITE_MSR \
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CTL_CODE( DEVICE_FILE_TYPE, 0x900, METHOD_BUFFERED, FILE_READ_ACCESS )
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#define IOCTL_READ_MSR \
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CTL_CODE( DEVICE_FILE_TYPE, 0x901, METHOD_BUFFERED, FILE_READ_ACCESS )
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#endif IOCTLCODES_H
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