First commit, Vystem v0.1

shelter/lib/include/cpu/tsc.h

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MPL-2.0
+#ifndef SH_LIB_TSC_H
+#define SH_LIB_TSC_H
+#include "std/type.h"
+#include "std/status.h"
+#include "cpu/asm.h"
+typedef sh_uint64 sh_tsc_TSC_VALUE;
+// Reas TSC register.
+static inline sh_tsc_TSC_VALUE sh_tsc_read_tsc() {
+  return sh_asm_rdtsc();
+}
+// Init kernel start tsc. Intended for single use only.
+SH_STATUS sh_tsc_init_tsc();
+// Return kernel start tsc.
+sh_tsc_TSC_VALUE sh_tsc_get_kernel_init_tsc();
+// Return kernel current tsc.
+sh_tsc_TSC_VALUE sh_tsc_get_kernel_current_tsc();
+#endif