1 files changed, 29 insertions, 0 deletions
diff --git a/roms/ipxe/src/arch/x86_64/include/bits/profile.h b/roms/ipxe/src/arch/x86_64/include/bits/profile.h
new file mode 100644
index 00000000..6fc16d84
--- /dev/null
+++ b/roms/ipxe/src/arch/x86_64/include/bits/profile.h
@@ -0,0 +1,29 @@
+#ifndef _BITS_PROFILE_H
+#define _BITS_PROFILE_H
+
+/** @file
+ *
+ * Profiling
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+
+/**
+ * Get profiling timestamp
+ *
+ * @ret timestamp	Timestamp
+ */
+static inline __attribute__ (( always_inline )) uint64_t
+profile_timestamp ( void ) {
+	uint32_t eax;
+	uint32_t edx;
+
+	/* Read timestamp counter */
+	__asm__ __volatile__ ( "rdtsc" : "=a" ( eax ), "=d" ( edx ) );
+	return ( ( ( ( uint64_t ) edx ) << 32 ) | eax );
+}
+
+#endif /* _BITS_PROFILE_H */