osfmk/i386/lowglobals.h

   1 /*
   2  * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*
  30  *              Header files for the Low Memory Globals (lg)
  31  */
  32 #ifndef _LOW_MEMORY_GLOBALS_H_
  33 #define _LOW_MEMORY_GLOBALS_H_
  34
  35 #include <mach/mach_types.h>
  36 #include <mach/vm_types.h>
  37 #include <mach/machine/vm_types.h>
  38 #include <mach/vm_prot.h>
  39
  40 /*
  41  * Don't change these structures unless you change the corresponding assembly code
  42  * which is in lowmem_vectors.s
  43  */
  44
  45 /*
  46  *      This is where we put constants, pointers, and data areas that must be accessed
  47  *      quickly through assembler.  They are designed to be accessed directly with
  48  *      absolute addresses, not via a base register.  This is a global area, and not
  49  *      per processor.
  50  */
  51
  52 #pragma pack(4)         /* Make sure the structure stays as we defined it */
  53 typedef struct lowglo {
  54
  55         unsigned char   lgVerCode[8];           /* 0x2000 System verification code */
  56         unsigned long long lgZero;              /* 0x2008 Double constant 0 */
  57         uint32_t        lgRsv010;               /* 0x2010 Reserved */
  58         uint32_t        lgCHUDXNUfnStart;       /* 0x2014 CHUD XNU function glue
  59                                                  * table */
  60         uint32_t        lgRsv018;               /* 0x2018 Reserved */
  61         uint32_t        lgVersion;              /* 0x201C Pointer to kernel version string */
  62         uint32_t        lgRsv020[280];          /* 0X2020 Reserved */
  63         uint32_t        lgKmodptr;              /* 0x2480 Pointer to kmod, debugging aid */
  64         uint32_t        lgTransOff;             /* 0x2484 Pointer to kdp_trans_off, debugging aid */
  65         uint32_t        lgReadIO;               /* 0x2488 Pointer to kdp_read_io, debugging aid */
  66         uint32_t        lgDevSlot1;             /* 0x248C For developer use */
  67         uint32_t        lgDevSlot2;             /* 0x2490 For developer use */
  68         uint32_t        lgOSVersion;            /* 0x2494 Pointer to OS version string */
  69         uint32_t        lgRebootFlag;           /* 0x2498 Pointer to debugger reboot trigger */
  70         uint32_t        lgRsv49C[729];          /* 0x549C Reserved - push to 1 page */
  71 } lowglo;
  72 #pragma pack()
  73 extern lowglo lowGlo;
  74 #endif /* _LOW_MEMORY_GLOBALS_H_ */