1 files changed, 33 insertions, 0 deletions
diff --git a/src/include/cpu/p6/msr.h b/src/include/cpu/p6/msr.h
new file mode 100644
index 0000000000..4977b0201d
--- /dev/null
+++ b/src/include/cpu/p6/msr.h
@@ -0,0 +1,33 @@
+#ifndef CPU_P6_MSR_H
+#define CPU_P6_MSR_H
+
+/*
+ * Access to machine-specific registers (available on 586 and better only)
+ * Note: the rd* operations modify the parameters directly (without using
+ * pointer indirection), this allows gcc to optimize better
+ */
+
+#define rdmsr(msr,val1,val2) \
+       __asm__ __volatile__("rdmsr" \
+			    : "=a" (val1), "=d" (val2) \
+			    : "c" (msr))
+
+#define wrmsr(msr,val1,val2) \
+     __asm__ __volatile__("wrmsr" \
+			  : /* no outputs */ \
+			  : "c" (msr), "a" (val1), "d" (val2))
+
+#define rdtsc(low,high) \
+     __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
+
+#define rdtscl(low) \
+     __asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx")
+
+#define rdtscll(val) \
+     __asm__ __volatile__ ("rdtsc" : "=A" (val))
+
+#define rdpmc(counter,low,high) \
+     __asm__ __volatile__("rdpmc" \
+			  : "=a" (low), "=d" (high) \
+			  : "c" (counter))
+#endif /* CPU_P6_MSR_H */