xnu-4570.1.46.tar.gz

[apple/xnu.git] / osfmk / machine / monotonic.h

diff --git a/osfmk/machine/monotonic.h b/osfmk/machine/monotonic.h
new file mode 100644 (file)
index 0000000..b3e75c8
--- /dev/null
+++ b/osfmk/machine/monotonic.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2017 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+#ifndef MACHINE_MONOTONIC_H
+#define MACHINE_MONOTONIC_H
+
+#if defined(__x86_64__)
+#include <x86_64/monotonic.h>
+#elif defined(__arm64__)
+#include <arm64/monotonic.h>
+#elif defined(__arm__)
+#include <arm/monotonic.h>
+#else
+#error unsupported architecture
+#endif
+
+#include <stdatomic.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+extern bool mt_core_supported;
+
+struct mt_cpu {
+       uint64_t mtc_snaps[MT_CORE_NFIXED];
+       uint64_t mtc_counts[MT_CORE_NFIXED];
+       uint64_t mtc_counts_last[MT_CORE_NFIXED];
+};
+
+struct mt_thread {
+       _Atomic uint64_t mth_gen;
+       uint64_t mth_counts[MT_CORE_NFIXED];
+};
+
+struct mt_task {
+       uint64_t mtk_counts[MT_CORE_NFIXED];
+};
+
+struct mt_cpu *mt_cur_cpu(void);
+void mt_mtc_update_fixed_counts(struct mt_cpu *mtc, uint64_t *counts,
+               uint64_t *counts_since);
+uint64_t mt_mtc_update_count(struct mt_cpu *mtc, unsigned int ctr);
+uint64_t mt_core_snap(unsigned int ctr);
+void mt_core_set_snap(unsigned int ctr, uint64_t snap);
+void mt_mtc_set_snap(struct mt_cpu *mtc, unsigned int ctr, uint64_t snap);
+
+#endif /* !defined(MACHINE_MONOTONIC_H) */