From: Stefan Reinauer <reina...@chromium.org>
Provide basic functions to access these registers.
Signed-off-by: Stefan Reinauer <reina...@chromium.org>
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/x86/include/asm/msr.h | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
create mode 100644 arch/x86/include/asm/msr.h
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
new file mode 100644
index 0000000..0a681d1
--- /dev/null
+++ b/arch/x86/include/asm/msr.h
@@ -0,0 +1,25 @@
+#ifndef CPU_X86_ASM_MSR_H
+#define CPU_X86_ASM_MSR_H
+
+static inline uint64_t rdmsr(unsigned index)
+{
+ uint64_t result;
+
+ asm volatile (
+ "rdmsr"
+ : "=A" (result)
+ : "c" (index)
+ );
+ return result;
+}
+
+static inline void wrmsr(unsigned index, uint64_t msr)
+{
+ asm volatile (
+ "wrmsr"
+ : /* No outputs */
+ : "c" (index), "A" (msr)
+ );
+}
+
+#endif /* CPU_X86_ASM_MSR_H */
--
1.7.7.3
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