diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2018-08-22 10:03:05 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-08-23 16:24:38 +0000 |
| commit | 052b5317dafade3884eb63aacd5960dcce871945 (patch) | |
| tree | e7a718c08638b1c5483c3e97ff8abb0ed17f2876 /payloads/libpayload/include | |
| parent | fcca617eaf6389e76d51c636329b3ed131deccd0 (diff) | |
libpayload/x86/cpuid: Add a cpuid macro
Since libpayload doesn't link against libgcc we need to define our own
cpuid macro. I didn't add any error checking since anything in the last
decade should support cpuid.
BUG=b:109749762
TEST=called it and made sure the correct flags were returned.
Change-Id: Id09878ac80c74416d0abca83e217516a9c1afeff
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/28238
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'payloads/libpayload/include')
| -rw-r--r-- | payloads/libpayload/include/x86/arch/cpuid.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/payloads/libpayload/include/x86/arch/cpuid.h b/payloads/libpayload/include/x86/arch/cpuid.h new file mode 100644 index 0000000000..fb68329c52 --- /dev/null +++ b/payloads/libpayload/include/x86/arch/cpuid.h @@ -0,0 +1,36 @@ +/* + * This file is part of the libpayload project. + * + * Copyright 2018 Google 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. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +#ifndef _ARCH_CPUID_H +#define _ARCH_CPUID_H + +#define cpuid(fn, eax, ebx, ecx, edx) \ + asm("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "0"(fn)) + +#endif |