1/*
2 * Copyright (c) 2007 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#if __arm__
53 uthread = __builtin_arm_mrc(15, 0, 13, 0, 3); // TPIDRURO
54#else
55 __asm__ volatile("mrs %0, TPIDRRO_EL0" : "=r" (uthread));
56#endif
57 return uthread;
58}
59
60void
61set_tpidrro(uintptr_t uthread)
62{
63#if __arm__
64 __builtin_arm_mcr(15, 0, uthread, 13, 0, 3); // TPIDRURO
65#else
66 __asm__ volatile("msr TPIDRRO_EL0, %0" : : "r" (uthread));
67#endif
68}
69
70kern_return_t
71thread_set_cthread_self(vm_address_t self)
72{
73 return machine_thread_set_tsd_base(current_thread(), self);
74}
75
76vm_address_t
77thread_get_cthread_self(void)
78{
79 uintptr_t self;
80
81 self = get_tpidrro();
82#if __arm__
83 self &= ~3;
84 assert( self == current_thread()->machine.cthread_self);
85 return ((kern_return_t) current_thread()->machine.cthread_self);
86#else
87 self &= MACHDEP_CTHREAD_MASK;
88 assert( self == current_thread()->machine.cthread_self);
89 return self;
90#endif
91}
92
93