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      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 */
     81