1 /* 2 * Copyright (c) 2017 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 #ifndef _MACHDEP_INTERNAL_H_ 29 #define _MACHDEP_INTERNAL_H_ 30 31 #include <machine/types.h> 32 33 #include <pexpert/arm64/board_config.h> 34 35 /* We cache the current cthread pointer in TPIDRRO_EL0 and 36 * the current CPU number in the low 12 bits of TPIDR_EL0. 37 * 38 * The cthread pointer must be aligned 39 * sufficiently that the maximum CPU number will fit. 40 * 41 * NOTE: Keep this in sync with libsyscall/os/tsd.h, specifically _os_cpu_number() 42 */ 43 #define MACHDEP_TPIDR_CPUNUM_MASK (0x0000000000000fff) 44 45 /* 46 * Machine Thread Flags (machine_thread.flags) 47 */ 48 49 /* Thread is entitled to use x18, don't smash it when switching to thread. */ 50 #if !__ARM_KERNEL_PROTECT__ 51 #define ARM_MACHINE_THREAD_PRESERVE_X18_SHIFT 0 52 #define ARM_MACHINE_THREAD_PRESERVE_X18 (1 << ARM_MACHINE_THREAD_PRESERVE_X18_SHIFT) 53 #endif /* !__ARM_KERNEL_PROTECT__ */ 54 55 #if defined(HAS_APPLE_PAC) 56 #define ARM_MACHINE_THREAD_DISABLE_USER_JOP_SHIFT 1 57 #define ARM_MACHINE_THREAD_DISABLE_USER_JOP (1 << ARM_MACHINE_THREAD_DISABLE_USER_JOP_SHIFT) 58 #endif 59 60 #endif /* _MACHDEP_INTERNAL_H_ */ 61