d900193518
This patch splits CPU flags related operations from DPDK and push them to architecture specific arch directories, so that other processor architecture can implement its own CPU flag functions to support DPDK. Signed-off-by: Chao Zhu <bjzhuc@cn.ibm.com> Signed-off-by: David Marchand <david.marchand@6wind.com> Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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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
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <rte_cpuflags.h>
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/*
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* This should prevent use of advanced instruction sets in this file. Otherwise
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* the check function itself could cause a crash.
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*/
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#ifdef __INTEL_COMPILER
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#pragma optimize ("", off)
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#else
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#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
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#if GCC_VERSION > 404000
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#pragma GCC optimize ("O0")
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#endif
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#endif
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/**
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* Checks if the machine is adequate for running the binary. If it is not, the
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* program exits with status 1.
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* The function attribute forces this function to be called before main(). But
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* with ICC, the check is generated by the compiler.
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*/
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#ifndef __INTEL_COMPILER
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void __attribute__ ((__constructor__))
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#else
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void
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#endif
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rte_cpu_check_supported(void)
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{
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/* This is generated at compile-time by the build system */
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static const enum rte_cpu_flag_t compile_time_flags[] = {
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RTE_COMPILE_TIME_CPUFLAGS
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};
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unsigned i;
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int ret;
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for (i = 0; i < sizeof(compile_time_flags)/sizeof(compile_time_flags[0]); i++) {
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ret = rte_cpu_get_flag_enabled(compile_time_flags[i]);
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if (ret < 0) {
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fprintf(stderr,
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"ERROR: CPU feature flag lookup failed with error %d\n",
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ret);
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exit(1);
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}
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if (!ret) {
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fprintf(stderr,
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"ERROR: This system does not support \"%s\".\n"
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"Please check that RTE_MACHINE is set correctly.\n",
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cpu_feature_table[compile_time_flags[i]].name);
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exit(1);
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}
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}
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}
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