63 lines
2.6 KiB
C
63 lines
2.6 KiB
C
/* kernel version macros */
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/*
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* Copyright (c) 2015 Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _kernel_version__h_
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#define _kernel_version__h_
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/*
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* The kernel version has been converted from a string to a four-byte
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* quantity that is divided into three parts.
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*
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* Part 1: The two most significant bytes are sub-divided into four nibbles,
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* representing the kernel's numeric version, w.x.y.z. These fields denote:
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* w -- generation release number
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* x -- major release
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* y -- minor release
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* z -- servicepack release
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* Each of these elements must therefore be in the range 0 to 15, inclusive.
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*
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* Part 2: The next most significant byte is used for a variety of flags and is
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* broken down as follows:
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* Bits 7..0 - Cleared as the are currently unused.
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*
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* Part 3: The least significant byte is reserved for future use.
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*/
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#define KERNEL_VER_GENERATION(ver) ((ver >> 28) & 0x0F)
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#define KERNEL_VER_MAJOR(ver) ((ver >> 24) & 0x0F)
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#define KERNEL_VER_MINOR(ver) ((ver >> 20) & 0x0F)
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#define KERNEL_VER_SERVICEPACK(ver) ((ver >> 16) & 0x0F)
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/* return 8-bit flags */
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#define KERNEL_VER_FLAGS(ver) ((ver >> 8) & 0xFF)
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#endif /* _kernel_version__h_ */
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