osfmk/ppc/cpu_data.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  *
  25  */
  26
  27 #ifndef PPC_CPU_DATA
  28 #define PPC_CPU_DATA
  29
  30 typedef struct
  31 {
  32         int             preemption_level;
  33         int             simple_lock_count;
  34         int             interrupt_level;
  35 } cpu_data_t;
  36
  37 #define disable_preemption                      _disable_preemption
  38 #define enable_preemption                       _enable_preemption
  39 #define enable_preemption_no_check              _enable_preemption_no_check
  40 #define mp_disable_preemption                   _disable_preemption
  41 #define mp_enable_preemption                    _enable_preemption
  42 #define mp_enable_preemption_no_check           _enable_preemption_no_check
  43
  44 extern __inline__ thread_act_t current_act(void)
  45 {
  46         thread_act_t act;
  47         __asm__ volatile("mfsprg %0,1" : "=r" (act));
  48         return act;
  49 };
  50
  51 /*
  52  *      Note that the following function is ONLY guaranteed when preemption or interrupts are disabled
  53  */
  54 extern __inline__ struct per_proc_info *getPerProc(void)
  55 {
  56         struct per_proc_info *perproc;
  57         __asm__ volatile("mfsprg %0,0" : "=r" (perproc));
  58         return perproc;
  59 };
  60
  61 #define current_thread()        current_act()->thread
  62
  63 extern void                                     set_machine_current_act(thread_act_t);
  64
  65 extern int                                      get_preemption_level(void);
  66 extern void                                     disable_preemption(void);
  67 extern void                                     enable_preemption(void);
  68 extern void                                     enable_preemption_no_check(void);
  69 extern void                                     mp_disable_preemption(void);
  70 extern void                                     mp_enable_preemption(void);
  71 extern void                                     mp_enable_preemption_no_check(void);
  72 extern int                                      get_simple_lock_count(void);
  73
  74 #endif  /* PPC_CPU_DATA */