osfmk/i386/lowglobals.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  *              Header files for the Low Memory Globals (lg)
  32  */
  33 #ifndef _LOW_MEMORY_GLOBALS_H_
  34 #define _LOW_MEMORY_GLOBALS_H_
  35
  36 #include <mach/mach_types.h>
  37 #include <mach/vm_types.h>
  38 #include <mach/machine/vm_types.h>
  39 #include <mach/vm_prot.h>
  40
  41 /*
  42  * Don't change these structures unless you change the corresponding assembly code
  43  * which is in lowmem_vectors.s
  44  */
  45
  46 /*
  47  *      This is where we put constants, pointers, and data areas that must be accessed
  48  *      quickly through assembler.  They are designed to be accessed directly with
  49  *      absolute addresses, not via a base register.  This is a global area, and not
  50  *      per processor.
  51  */
  52
  53 #pragma pack(4)         /* Make sure the structure stays as we defined it */
  54 typedef struct lowglo {
  55
  56         unsigned char   lgVerCode[8];           /* 0x2000 System verification code */
  57         unsigned long long lgZero;              /* 0x2008 Double constant 0 */
  58         uint32_t        lgRsv010[3];            /* 0x2010 Reserved */
  59         uint32_t        lgVersion;              /* 0x201C Pointer to kernel version string */
  60         uint32_t        lgRsv020[280];          /* 0X2020 Reserved */
  61         uint32_t        lgKmodptr;              /* 0x2480 Pointer to kmod, debugging aid */
  62         uint32_t        lgTransOff;             /* 0x2484 Pointer to kdp_trans_off, debugging aid */
  63         uint32_t        lgRsv028;               /* 0x2488 Reserved */
  64         uint32_t        lgDevSlot1;             /* 0x248C For developer use */
  65         uint32_t        lgDevSlot2;             /* 0x2490 For developer use */
  66         uint32_t        lgRsv494[731];          /* Reserved - push to 1 page */
  67 } lowglo;
  68
  69
  70 #endif /* _LOW_MEMORY_GLOBALS_H_ */