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authorRaul E Rangel <rrangel@chromium.org>2018-08-22 10:03:05 -0600
committerPatrick Georgi <pgeorgi@google.com>2018-08-23 16:24:38 +0000
commit052b5317dafade3884eb63aacd5960dcce871945 (patch)
treee7a718c08638b1c5483c3e97ff8abb0ed17f2876 /payloads/libpayload/include
parentfcca617eaf6389e76d51c636329b3ed131deccd0 (diff)
downloadcoreboot-052b5317dafade3884eb63aacd5960dcce871945.tar.xz
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.h36
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