kernel/common/version.c

/* version.c */

/*
 * Copyright (c) 1997-2010, 2012-2014 Wind River Systems, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1) Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2) Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3) Neither the name of Wind River Systems nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/* includes */

#include <cputype.h>
#include "version.h" /* generated by MAKE, at compile time */

/* locals */

static uint32_t kernel_version = KERNELVERSION;

/*******************************************************************************
*
* kernel_version_get - return the kernel version of the present build
*
* The kernel version is a four-byte word divided into three parts.
*
* Part 1: The two most significant bytes are sub-divided into four nibbles,
* representing the kernel's numeric version -- that is, w.x.y.z.
* (Each numeric element must therefore be in the range 0 to 15, inclusive.)
*
* Part 2: The next most significant byte is used for a variety of flags and
* is broken down as follows:
*      Bit 7     - Set for VSP builds; clear for SP builds
*      Bit 6     - Set for release builds; clear for debug builds
*      Bits 5..0 - Cleared as they are currently unused
*
* Part 3: The least significant byte is reserved for future use.
*
* RETURNS: kernel version
*/

uint32_t kernel_version_get(void)
{
	return kernel_version;
}