| | 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 | |
| | 46 | extern kern_return_t kern_invalid(void); |
| | 47 | |
| | 48 | uintptr_t |
| | 49 | get_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 | |
| | 60 | void |
| | 61 | set_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 | |
| | 70 | kern_return_t |
| | 71 | thread_set_cthread_self(vm_address_t self) |
| | 72 | { |
| | 73 | return machine_thread_set_tsd_base(current_thread(), self); |
| | 74 | } |
| | 75 | |
| | 76 | vm_address_t |
| | 77 | thread_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 | } |
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