initial commit

port/moonlight/hwtimer.h

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+
+/***************************************************************************
+ * Copyright (c) 2024 Microsoft Corporation
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the MIT License which is available at
+ * https://opensource.org/licenses/MIT.
+ *
+ * SPDX-License-Identifier: MIT
+ **************************************************************************/
+
+#ifndef RISCV_HWTIMER_H
+#define RISCV_HWTIMER_H
+
+#include "platform.h"
+
+#define TICKNUM_PER_SECOND 32768
+#define TICKNUM_PER_TIMER (TICKNUM_PER_SECOND / 1000)
+
+static inline int hwtimer_init(void) {
+    uint64_t time = get_aclint_mtime(aclint);
+    set_aclint_mtimecmp(aclint, time + TICKNUM_PER_TIMER);
+    return 0;
+}
+
+static inline int hwtimer_handler(void) {
+    uint64_t time = get_aclint_mtime(aclint);
+    set_aclint_mtimecmp(aclint, time + TICKNUM_PER_TIMER);
+    return 0;
+}
+
+#endif