osfmk/ppc/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 _PPC_COMMPAGE_H
  27 #define _PPC_COMMPAGE_H
  28
  29 #ifndef __ASSEMBLER__
  30 #include <stdint.h>
  31 #endif /* __ASSEMBLER__ */
  32
  33
  34 /* Special check bits for the compage_descriptor "special" field. */
  35
  36 #define kCommPageDCBA           0x0001                  // this routine uses DCBA, map to NOP if not appropriate
  37 #define kCommPageSYNC           0x0002                  // this routine uses SYNC, map to NOP if UP
  38 #define kCommPageMTCRF          0x0004                  // set bit 11 in MTCRF if only 1 cr specified
  39
  40
  41 #ifdef  __ASSEMBLER__
  42
  43 #define COMMPAGE_DESCRIPTOR(label,address,must,cant,special)    \
  44 LEXT(label)     @\
  45     .short      label-. @\
  46     .short      .-label-2       @\
  47     .short      address @\
  48     .short      special @\
  49     .long       must    @\
  50     .long       cant
  51
  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     short       code_offset;                                    // offset to code from this descriptor
  62     short       code_length;                                    // length in bytes
  63     short       commpage_address;                               // put at this address (_COMM_PAGE_BCOPY etc)
  64     short       special;                                                // special handling bits for DCBA and SYNC etc
  65     long        musthave;                                               // _cpu_capability bits we must have
  66     long        canthave;                                               // _cpu_capability bits we can't have
  67 } commpage_descriptor;
  68
  69
  70 extern  char    *commPagePtr;                           // virt address of commpage in kernel map
  71
  72
  73 extern  void    commpage_set_timestamp(uint64_t tbr,uint32_t secs,uint32_t usecs,uint32_t ticks_per_sec);
  74 extern  int             commpage_time_dcba( void );
  75
  76 #endif  /* __ASSEMBLER__ */
  77
  78 #endif /* _PPC_COMMPAGE_H */