// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package runtime

func checkgoarm() {
	// TODO(minux): FP checks like in os_linux_arm.go.

	// osinit not called yet, so ncpu not set: must use getncpu directly.
	if getncpu() > 1 && goarm < 7 {
		print("runtime: this system has multiple CPUs and must use\n")
		print("atomic synchronization instructions. Recompile using GOARM=7.\n")

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build arm64 && darwin && !ios

package cpu

import _ "unsafe" // for linkname

func osInit() {
	ARM64.HasATOMICS = sysctlEnabled([]byte("hw.optional.armv8_1_atomics\x00"))
	ARM64.HasCRC32 = sysctlEnabled([]byte("hw.optional.armv8_crc32\x00"))
	ARM64.HasSHA512 = sysctlEnabled([]byte("hw.optional.armv8_2_sha512\x00"))

	mc.__gregs[_REG_R1] = uint32(uintptr(unsafe.Pointer(gp)))
	mc.__gregs[_REG_R2] = uint32(fn)
}

func checkgoarm() {
	// TODO(minux): FP checks like in os_linux_arm.go.

	// osinit not called yet, so ncpu not set: must use getncpu directly.
	if getncpu() > 1 && goarm < 7 {
		print("runtime: this system has multiple CPUs and must use\n")
		print("atomic synchronization instructions. Recompile using GOARM=7.\n")

//
//go:noescape
func write1(fd uintptr, p unsafe.Pointer, n int32) int32

//go:noescape
func open(name *byte, mode, perm int32) int32

// return value is only set on linux to be used in osinit().
func madvise(addr unsafe.Pointer, n uintptr, flags int32) int32

// exitThread terminates the current thread, writing *wait = freeMStack when
// the stack is safe to reclaim.
//
//go:noescape

		print("a binary compiled for VFPv3 hard floating point. Recompile adding ,softfloat\n")
		print("to GOARM or changing GOARM to 6.\n")
		exit(1)
	}

	// osinit not called yet, so ncpu not set: must use getncpu directly.
	if getncpu() > 1 && goarm < 7 {
		print("runtime: this system has multiple CPUs and must use\n")
		print("atomic synchronization instructions. Recompile using GOARM=7.\n")

//
//go:noescape
func write1(fd uintptr, p unsafe.Pointer, n int32) int32

//go:noescape
func open(name *byte, mode, perm int32) int32

// return value is only set on linux to be used in osinit().
func madvise(addr unsafe.Pointer, n uintptr, flags int32) int32

// exitThread terminates the current thread, writing *wait = freeMStack when
// the stack is safe to reclaim.
//
//go:noescape

}

// Called to initialize a new m (including the bootstrap m).
// Called on the new thread, cannot allocate memory.
func minit() {
}

// Called from dropm to undo the effect of an minit.
func unminit() {
}

// Called from exitm, but not from drop, to undo the effect of thread-owned
// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.
func mdestroy(mp *m) {
}

// wasm has no signals

// Called on the new thread, can not allocate memory.
func minit() {
	getg().m.procid = uint64(getthrid())
	minitSignals()
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {
	unminitSignals()
	getg().m.procid = 0
}

// Called from exitm, but not from drop, to undo the effect of thread-owned
// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.

	}
	return 0
}

//go:nosplit
func semawakeup(mp *m) {
	if sem_post((*semt)(unsafe.Pointer(mp.waitsema))) != 0 {
		throw("sem_post")
	}
}

func osinit() {
	// Call miniterrno so that we can safely make system calls
	// before calling minit on m0.
	miniterrno()

	ncpu = int32(sysconf(__SC_NPROCESSORS_ONLN))
	physPageSize = sysconf(__SC_PAGE_SIZE)
}

// Called on the new thread, cannot allocate memory.
func minit() {
	getg().m.procid = uint64(lwp_gettid())
	minitSignals()
}

// Called from dropm to undo the effect of an minit.
//
//go:nosplit
func unminit() {
	unminitSignals()
	getg().m.procid = 0
}

// Called from exitm, but not from drop, to undo the effect of thread-owned
// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.