osfmk/ppc/cpu_data.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  *
  28  */
  29
  30 #ifndef PPC_CPU_DATA
  31 #define PPC_CPU_DATA
  32
  33 typedef struct
  34 {
  35         int             preemption_level;
  36         int             simple_lock_count;
  37         int             interrupt_level;
  38 } cpu_data_t;
  39
  40 #define disable_preemption                      _disable_preemption
  41 #define enable_preemption                       _enable_preemption
  42 #define enable_preemption_no_check              _enable_preemption_no_check
  43 #define mp_disable_preemption                   _disable_preemption
  44 #define mp_enable_preemption                    _enable_preemption
  45 #define mp_enable_preemption_no_check           _enable_preemption_no_check
  46
  47 extern __inline__ thread_act_t current_act(void)
  48 {
  49         thread_act_t act;
  50         __asm__ volatile("mfsprg %0,1" : "=r" (act));
  51         return act;
  52 };
  53
  54 /*
  55  *      Note that the following function is ONLY guaranteed when preemption or interrupts are disabled
  56  */
  57 extern __inline__ struct per_proc_info *getPerProc(void)
  58 {
  59         struct per_proc_info *perproc;
  60         __asm__ volatile("mfsprg %0,0" : "=r" (perproc));
  61         return perproc;
  62 };
  63
  64 #define current_thread()        current_act()->thread
  65
  66 extern void                                     set_machine_current_act(thread_act_t);
  67
  68 extern int                                      get_preemption_level(void);
  69 extern void                                     disable_preemption(void);
  70 extern void                                     enable_preemption(void);
  71 extern void                                     enable_preemption_no_check(void);
  72 extern void                                     mp_disable_preemption(void);
  73 extern void                                     mp_enable_preemption(void);
  74 extern void                                     mp_enable_preemption_no_check(void);
  75 extern int                                      get_simple_lock_count(void);
  76
  77 #endif  /* PPC_CPU_DATA */