osfmk/i386/commpage/commpage.h

   1 /*
   2  * Copyright (c) 2003-2006 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 /* The following macro is used to generate the 64-bit commpage address for a given
  31  * routine, based on its 32-bit address.  This is used in the kernel to compile
  32  * the 64-bit commpage.  Since the kernel is a 32-bit object, cpu_capabilities.h
  33  * only defines the 32-bit address.
  34  */
  35 #define _COMM_PAGE_32_TO_64( ADDRESS )  ( ADDRESS + _COMM_PAGE64_START_ADDRESS - _COMM_PAGE32_START_ADDRESS )
  36
  37
  38 #ifdef  __ASSEMBLER__
  39
  40 #define COMMPAGE_DESCRIPTOR(label,address,must,cant)    \
  41 L ## label ## _end:                                     ;\
  42 .const_data                                             ;\
  43 L ## label ## _size = L ## label ## _end - L ## label   ;\
  44 .private_extern _commpage_ ## label                     ;\
  45 _commpage_ ## label ## :                                ;\
  46     .long       L ## label                              ;\
  47     .long       L ## label ## _size                     ;\
  48     .long       address                                 ;\
  49     .long       must                                    ;\
  50     .long       cant                                    ;\
  51 .text
  52
  53 #else /* __ASSEMBLER__ */
  54
  55 /* Each potential commpage routine is described by one of these.
  56  * Note that the COMMPAGE_DESCRIPTOR macro (above), used in
  57  * assembly language, must agree with this.
  58  */
  59
  60 typedef struct  commpage_descriptor     {
  61     void        *code_address;                                  // address of code
  62     long        code_length;                                    // length in bytes
  63     long        commpage_address;                               // put at this address (_COMM_PAGE_BCOPY etc)
  64     long        musthave;                                       // _cpu_capability bits we must have
  65     long        canthave;                                       // _cpu_capability bits we can't have
  66 } commpage_descriptor;
  67
  68
  69 extern  char    *commPagePtr32;                         // virt address of 32-bit commpage in kernel map
  70 extern  char    *commPagePtr64;                         // ...and of 64-bit commpage
  71
  72 extern  void    _commpage_set_timestamp(uint64_t abstime, uint64_t secs);
  73 #define commpage_set_timestamp(x, y, z)         _commpage_set_timestamp((x), (y))
  74
  75 extern  void    commpage_set_nanotime(uint64_t tsc_base, uint64_t ns_base, uint32_t scale, uint32_t shift);
  76
  77 #include <kern/page_decrypt.h>
  78
  79 #endif  /* __ASSEMBLER__ */
  80
  81 #endif /* _I386_COMMPAGE_H */