usr/src/uts/intel/sys/bootsvcs.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_BOOTSVCS_H
  28 #define _SYS_BOOTSVCS_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * Boot time configuration information objects
  38  *
  39  * The BS_VERSION version number should be incremented when adding
  40  * new boot_syscalls entry points.  The kernel can check the boot_syscalls
  41  * version number by looking up the BS_VERSION_PROP property in the
  42  * device tree.  This version number allows the kernel to detect if the
  43  * version of boot.bin that loaded it supports newer boot_syscalls entry
  44  * points.  This in turn allows the kernel to potentially support
  45  * backward compatibility with older versions of boot.bin that don't
  46  * support newer entry points.
  47  *
  48  * (Before we get too carried away with extending this interface,
  49  * realize how broken it is.  Even with a cleaner namespace than
  50  * we used to have prior to S10, it is -extremely- difficult to
  51  * interpose upon because the method pointer is NOT passed to the
  52  * methods.  We would do well to extend the bootops and EOL this
  53  * interface as fast as possible, rather than to add more to it.)
  54  */
  55 #define BS_VERSION 4
  56 #define BS_VERSION_PROP "bs-version"
  57
  58 typedef struct boot_syscalls {                  /* offset */
  59         int     (*bsvc_getchar)();              /*  7 - getchar */
  60         void    (*bsvc_putchar)(int);           /*  8 - putchar */
  61         int     (*bsvc_ischar)();               /*  9 - ischar */
  62 } boot_syscalls_t;
  63
  64 #ifdef _KMDB
  65 extern boot_syscalls_t *kmdb_sysp;
  66 #define SYSP    kmdb_sysp
  67 #else /* !_KMDB */
  68 extern boot_syscalls_t *sysp;
  69 #define SYSP    sysp
  70 #endif
  71
  72 #define BSVC_GETCHAR(sysp)              (((sysp)->bsvc_getchar)())
  73 #define BSVC_PUTCHAR(sysp, c)           (((sysp)->bsvc_putchar)(c))
  74 #define BSVC_ISCHAR(sysp)               (((sysp)->bsvc_ischar)())
  75
  76 #ifdef  __cplusplus
  77 }
  78 #endif
  79
  80 #endif /* _SYS_BOOTSVCS_H */