osfmk/arm/thread.h

   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  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  */
  58
  59 #ifndef _ARM_THREAD_H_
  60 #define _ARM_THREAD_H_
  61
  62 #include <mach/mach_types.h>
  63 #include <mach/boolean.h>
  64 #include <mach/arm/vm_types.h>
  65 #include <mach/thread_status.h>
  66
  67 #ifdef MACH_KERNEL_PRIVATE
  68 #include <arm/cpu_data.h>
  69 #include <arm/proc_reg.h>
  70 #endif
  71
  72 #if __ARM_VFP__
  73
  74 #define VFPSAVE_ALIGN  16
  75 #define VFPSAVE_ATTRIB __attribute__((aligned (VFPSAVE_ALIGN)))
  76 #define THREAD_ALIGN   VFPSAVE_ALIGN
  77
  78 /*
  79  * vector floating point saved state
  80  */
  81 struct arm_vfpsaved_state {
  82         uint32_t r[64];
  83         uint32_t fpscr;
  84         uint32_t fpexc;
  85 };
  86 #endif
  87
  88 struct perfcontrol_state {
  89         uint64_t opaque[8] __attribute__((aligned(8)));
  90 };
  91
  92 /*
  93  * Maps state flavor to number of words in the state:
  94  */
  95 extern unsigned int _MachineStateCount[];
  96
  97 #ifdef MACH_KERNEL_PRIVATE
  98 #if __arm64__
  99 typedef arm_context_t machine_thread_kernel_state;
 100 #else
 101 typedef struct arm_saved_state machine_thread_kernel_state;
 102 #endif
 103 #include <kern/thread_kernel_state.h>
 104
 105 struct machine_thread {
 106 #if __arm64__
 107         arm_context_t *           contextData;             /* allocated user context */
 108         arm_saved_state_t *       upcb;                    /* pointer to user GPR state */
 109         arm_neon_saved_state_t *  uNeon;                   /* pointer to user VFP state */
 110 #elif __arm__
 111         struct arm_saved_state    PcbData;
 112 #if __ARM_VFP__
 113         struct arm_vfpsaved_state uVFPdata VFPSAVE_ATTRIB;
 114         struct arm_vfpsaved_state kVFPdata VFPSAVE_ATTRIB;
 115 #endif /* __ARM_VFP__ */
 116
 117 #else
 118 #error Unknown arch
 119 #endif
 120
 121 #if __ARM_USER_PROTECT__
 122         unsigned int              uptw_ttc;
 123         unsigned int              uptw_ttb;
 124         unsigned int              kptw_ttb;
 125         unsigned int              asid;
 126 #endif
 127
 128         vm_offset_t               kstackptr;                  /* top of kernel stack */
 129 #if defined(HAS_APPLE_PAC)
 130         uint64_t                  rop_pid;
 131         boolean_t                 disable_user_jop;
 132 #endif
 133         struct cpu_data *         CpuDatap;                   /* current per cpu data */
 134         unsigned int              preemption_count;           /* preemption count */
 135
 136 #if __ARM_SMP__
 137 #define MACHINE_THREAD_FLAGS_ON_CPU (0x1)
 138
 139         uint8_t                   machine_thread_flags;
 140 #endif /* __ARM_SMP__ */
 141
 142         arm_debug_state_t *       DebugData;
 143         mach_vm_address_t         cthread_self;               /* for use of cthread package */
 144         mach_vm_address_t         cthread_data;               /* for use of cthread package */
 145
 146         struct perfcontrol_state  perfctrl_state;
 147 #if __arm64__
 148         uint64_t                  energy_estimate_nj;
 149 #endif
 150
 151 #if INTERRUPT_MASKED_DEBUG
 152         uint64_t                  intmask_timestamp;          /* timestamp of when interrupts were masked */
 153 #endif
 154 };
 155 #endif
 156
 157 extern struct arm_saved_state *    get_user_regs(thread_t);
 158 extern struct arm_saved_state *    find_user_regs(thread_t);
 159 extern struct arm_saved_state *    find_kern_regs(thread_t);
 160 extern struct arm_vfpsaved_state * find_user_vfp(thread_t);
 161 #if defined(__arm__)
 162 extern arm_debug_state_t *         find_debug_state(thread_t);
 163 #elif defined(__arm64__)
 164 extern arm_debug_state32_t *       find_debug_state32(thread_t);
 165 extern arm_debug_state64_t *       find_debug_state64(thread_t);
 166 extern arm_neon_saved_state_t *    get_user_neon_regs(thread_t);
 167 #else
 168 #error unknown arch
 169 #endif
 170
 171 #define FIND_PERFCONTROL_STATE(th) (&th->machine.perfctrl_state)
 172
 173 #ifdef MACH_KERNEL_PRIVATE
 174 #if __ARM_VFP__
 175 extern void vfp_state_initialize(struct arm_vfpsaved_state *vfp_state);
 176 extern void vfp_save(struct arm_vfpsaved_state *vfp_ss);
 177 extern void vfp_load(struct arm_vfpsaved_state *vfp_ss);
 178 #endif /* __ARM_VFP__ */
 179 extern void arm_debug_set(arm_debug_state_t *debug_state);
 180 #if defined(__arm64__)
 181 extern void arm_debug_set32(arm_debug_state_t *debug_state);
 182 extern void arm_debug_set64(arm_debug_state_t *debug_state);
 183 #endif
 184 #endif /* MACH_KERNEL_PRIVATE */
 185
 186 extern void *act_thread_csave(void);
 187 extern void act_thread_catt(void *ctx);
 188 extern void act_thread_cfree(void *ctx);
 189
 190
 191 /*
 192  * Return address of the function that called current function, given
 193  * address of the first parameter of current function.
 194  */
 195 #define GET_RETURN_PC(addr) (__builtin_return_address(0))
 196
 197 #endif /* _ARM_THREAD_H_ */