osfmk/i386/commpage/commpage.h

   1 /*
   2  * Copyright (c) 2003 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 #ifndef _I386_COMMPAGE_H
  27 #define _I386_COMMPAGE_H
  28
  29 #ifndef __ASSEMBLER__
  30 #include <stdint.h>
  31 #endif /* __ASSEMBLER__ */
  32
  33 #ifdef  __ASSEMBLER__
  34 #include <machine/asm.h>
  35
  36 #define COMMPAGE_DESCRIPTOR(label,address,must,cant)    \
  37 L ## label ## _end:                                     ;\
  38 .const_data                                             ;\
  39 L ## label ## _size = L ## label ## _end - L ## label   ;\
  40 .private_extern _commpage_ ## label                     ;\
  41 _commpage_ ## label ## :                                ;\
  42     .long       L ## label                              ;\
  43     .long       L ## label ## _size                     ;\
  44     .long       address                                 ;\
  45     .long       must                                    ;\
  46     .long       cant                                    ;\
  47 .text
  48
  49 #else /* __ASSEMBLER__ */
  50
  51 /* Each potential commpage routine is described by one of these.
  52  * Note that the COMMPAGE_DESCRIPTOR macro (above), used in
  53  * assembly language, must agree with this.
  54  */
  55
  56 typedef struct  commpage_descriptor     {
  57     void        *code_address;                                  // address of code
  58     long        code_length;                                    // length in bytes
  59     long        commpage_address;                               // put at this address (_COMM_PAGE_BCOPY etc)
  60     long        musthave;                                       // _cpu_capability bits we must have
  61     long        canthave;                                       // _cpu_capability bits we can't have
  62 } commpage_descriptor;
  63
  64
  65 extern  char    *commPagePtr;                           // virt address of commpage in kernel map
  66
  67 extern  void    commpage_set_timestamp(uint64_t tbr,uint32_t secs,uint32_t usecs,uint32_t ticks_per_sec);
  68
  69 #endif  /* __ASSEMBLER__ */
  70
  71 #endif /* _I386_COMMPAGE_H */