osfmk/i386/lowglobals.h

   1 /*
   2  * Copyright (c) 2000-2005 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  *              Header files for the Low Memory Globals (lg)
  24  */
  25 #ifndef _LOW_MEMORY_GLOBALS_H_
  26 #define _LOW_MEMORY_GLOBALS_H_
  27
  28 #include <mach/mach_types.h>
  29 #include <mach/vm_types.h>
  30 #include <mach/machine/vm_types.h>
  31 #include <mach/vm_prot.h>
  32
  33 /*
  34  * Don't change these structures unless you change the corresponding assembly code
  35  * which is in lowmem_vectors.s
  36  */
  37
  38 /*
  39  *      This is where we put constants, pointers, and data areas that must be accessed
  40  *      quickly through assembler.  They are designed to be accessed directly with
  41  *      absolute addresses, not via a base register.  This is a global area, and not
  42  *      per processor.
  43  */
  44
  45 #pragma pack(4)         /* Make sure the structure stays as we defined it */
  46 typedef struct lowglo {
  47
  48         unsigned char   lgVerCode[8];           /* 0x2000 System verification code */
  49         unsigned long long lgZero;              /* 0x2008 Double constant 0 */
  50         uint32_t        lgRsv010[3];            /* 0x2010 Reserved */
  51         uint32_t        lgVersion;              /* 0x201C Pointer to kernel version string */
  52         uint32_t        lgRsv020[280];          /* 0X2020 Reserved */
  53         uint32_t        lgKmodptr;              /* 0x2480 Pointer to kmod, debugging aid */
  54         uint32_t        lgTransOff;             /* 0x2484 Pointer to kdp_trans_off, debugging aid */
  55         uint32_t        lgRsv028;               /* 0x2488 Reserved */
  56         uint32_t        lgDevSlot1;             /* 0x248C For developer use */
  57         uint32_t        lgDevSlot2;             /* 0x2490 For developer use */
  58         uint32_t        lgRsv494[731];          /* Reserved - push to 1 page */
  59 } lowglo;
  60
  61
  62 #endif /* _LOW_MEMORY_GLOBALS_H_ */