kern/clock: new module

1 files changed, 42 insertions, 0 deletions

diff --git a/kern/clock_i.h b/kern/clock_i.h
new file mode 100644
index 0000000..830f48c
--- /dev/null
+++ b/kern/clock_i.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2017 Richard Braun.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KERN_CLOCK_I_H
+#define _KERN_CLOCK_I_H
+
+#include <stdint.h>
+
+#include <machine/cpu.h>
+
+union clock_global_time {
+    alignas(CPU_L1_SIZE) uint64_t ticks;
+
+#ifndef ATOMIC_HAVE_64B_OPS
+    struct {
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+        uint32_t high1;
+        uint32_t low;
+#else /* __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ */
+        uint32_t low;
+        uint32_t high1;
+#endif /* __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ */
+        uint32_t high2;
+    };
+#endif /* ATOMIC_HAVE_64B_OPS */
+};
+
+#endif /* _KERN_CLOCK_I_H */