osfmk/i386/commpage/commpage.h

   1 /*
   2  * Copyright (c) 2003 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 #ifndef _I386_COMMPAGE_H
  24 #define _I386_COMMPAGE_H
  25
  26 #ifndef __ASSEMBLER__
  27 #include <stdint.h>
  28 #endif /* __ASSEMBLER__ */
  29
  30 #ifdef  __ASSEMBLER__
  31 #include <machine/asm.h>
  32
  33 #define COMMPAGE_DESCRIPTOR(label,address,must,cant)    \
  34 L ## label ## _end:                                     ;\
  35 .const_data                                             ;\
  36 L ## label ## _size = L ## label ## _end - L ## label   ;\
  37 .private_extern _commpage_ ## label                     ;\
  38 _commpage_ ## label ## :                                ;\
  39     .long       L ## label                              ;\
  40     .long       L ## label ## _size                     ;\
  41     .long       address                                 ;\
  42     .long       must                                    ;\
  43     .long       cant                                    ;\
  44 .text
  45
  46 #else /* __ASSEMBLER__ */
  47
  48 /* Each potential commpage routine is described by one of these.
  49  * Note that the COMMPAGE_DESCRIPTOR macro (above), used in
  50  * assembly language, must agree with this.
  51  */
  52
  53 typedef struct  commpage_descriptor     {
  54     void        *code_address;                                  // address of code
  55     long        code_length;                                    // length in bytes
  56     long        commpage_address;                               // put at this address (_COMM_PAGE_BCOPY etc)
  57     long        musthave;                                       // _cpu_capability bits we must have
  58     long        canthave;                                       // _cpu_capability bits we can't have
  59 } commpage_descriptor;
  60
  61
  62 extern  char    *commPagePtr;                           // virt address of commpage in kernel map
  63
  64 extern  void    commpage_set_timestamp(uint64_t tbr,uint32_t secs,uint32_t usecs,uint32_t ticks_per_sec);
  65
  66 typedef struct {
  67         uint64_t        nt_base_tsc;
  68         uint64_t        nt_base_ns;
  69         uint32_t        nt_scale;
  70         uint32_t        nt_shift;
  71         uint64_t        nt_check_tsc;
  72 } commpage_nanotime_t;
  73 extern  void    commpage_set_nanotime(commpage_nanotime_t *new_nanotime);
  74
  75 #endif  /* __ASSEMBLER__ */
  76
  77 #endif /* _I386_COMMPAGE_H */