osfmk/i386/commpage/commpage.h

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef _I386_COMMPAGE_H
  25 #define _I386_COMMPAGE_H
  26
  27 #ifndef __ASSEMBLER__
  28 #include <stdint.h>
  29 #endif /* __ASSEMBLER__ */
  30
  31 #ifdef  __ASSEMBLER__
  32 #include <machine/asm.h>
  33
  34 #define COMMPAGE_DESCRIPTOR(label,address,must,cant)    \
  35 L ## label ## _end:                                     ;\
  36 .const_data                                             ;\
  37 L ## label ## _size = L ## label ## _end - L ## label   ;\
  38 .private_extern _commpage_ ## label                     ;\
  39 _commpage_ ## label ## :                                ;\
  40     .long       L ## label                              ;\
  41     .long       L ## label ## _size                     ;\
  42     .long       address                                 ;\
  43     .long       must                                    ;\
  44     .long       cant                                    ;\
  45 .text
  46
  47 #else /* __ASSEMBLER__ */
  48
  49 /* Each potential commpage routine is described by one of these.
  50  * Note that the COMMPAGE_DESCRIPTOR macro (above), used in
  51  * assembly language, must agree with this.
  52  */
  53
  54 typedef struct  commpage_descriptor     {
  55     void        *code_address;                                  // address of code
  56     long        code_length;                                    // length in bytes
  57     long        commpage_address;                               // put at this address (_COMM_PAGE_BCOPY etc)
  58     long        musthave;                                       // _cpu_capability bits we must have
  59     long        canthave;                                       // _cpu_capability bits we can't have
  60 } commpage_descriptor;
  61
  62
  63 extern  char    *commPagePtr;                           // virt address of commpage in kernel map
  64
  65 extern  void    commpage_set_timestamp(uint64_t tbr,uint32_t secs,uint32_t usecs,uint32_t ticks_per_sec);
  66
  67 typedef struct {
  68         uint64_t        nt_base_tsc;
  69         uint64_t        nt_base_ns;
  70         uint32_t        nt_scale;
  71         uint32_t        nt_shift;
  72         uint64_t        nt_check_tsc;
  73 } commpage_nanotime_t;
  74 extern  void    commpage_set_nanotime(commpage_nanotime_t *new_nanotime);
  75
  76 #endif  /* __ASSEMBLER__ */
  77
  78 #endif /* _I386_COMMPAGE_H */