1// Copyright 2014 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package runtime
6
7func checkgoarm() {
8	// TODO(minux): FP checks like in os_linux_arm.go.
9
10	// osinit not called yet, so ncpu not set: must use getncpu directly.
11	if getncpu() > 1 && goarm < 7 {
12		print("runtime: this system has multiple CPUs and must use\n")
13		print("atomic synchronization instructions. Recompile using GOARM=7.\n")
14		exit(1)
15	}
16}
17
18//go:nosplit
19func cputicks() int64 {
20	// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand().
21	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
22	return nanotime()
23}
24