1/*
2 * Copyright (c) 2007-2021 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright (c) 1992 NeXT Computer, Inc.
30 *
31 * Machine dependent kernel calls.
32 *
33 * HISTORY
34 *
35 * 17 June 1992 ? at NeXT
36 * Created.
37 */
38
39#include <kern/thread.h>
40#include <mach/mach_types.h>
41#include <arm/machdep_call.h>
42#if __arm64__
43#include <arm64/machine_machdep.h>
44#endif
45
46extern kern_return_t kern_invalid(void);
47
48uintptr_t
49get_tpidrro(void)
50{
51 uintptr_t uthread;
52 __asm__ volatile ("mrs %0, TPIDRRO_EL0" : "=r" (uthread));
53 return uthread;
54}
55
56void
57set_tpidrro(uintptr_t uthread)
58{
59 __asm__ volatile ("msr TPIDRRO_EL0, %0" : : "r" (uthread));
60}
61
62kern_return_t
63thread_set_cthread_self(vm_address_t self)
64{
65 return machine_thread_set_tsd_base(thread: current_thread(), tsd_base: self);
66}
67
68vm_address_t
69thread_get_cthread_self(void)
70{
71 uintptr_t self;
72
73 self = get_tpidrro();
74 assert( self == current_thread()->machine.cthread_self);
75 return self;
76}
77