prom_init.c revision 986fd29a0dc13f7608ef7f508f6e700bd7bc2720
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/promif.h>
#include <sys/promimpl.h>
#include <sys/platform_module.h>
int obp_romvec_version = -1; /* -1 rsrvd for non-obp sunromvec */
int prom_aligned_allocator = 0; /* Not needed for 1275 */
void *p1275cif; /* 1275 Client interface handler */
#ifdef PROMIF_DEBUG
int promif_debug = 0;
#endif /* PROMIF_DEBUG */
/*
* This is the string we use to print out "panic" level messages,
* so that it's easier to identify who's doing the complaining.
*/
#define PROMIF_CLNTNAMELEN 16
char promif_clntname[PROMIF_CLNTNAMELEN];
/*
* The plat_setprop_enter() and plat_setprop_exit() routines are actually
* defined as #pragma weak symbols, which confuses lint since it does not grok
* #pragma weak and thus thinks the routines are used but not defined. Until
* lint is enhanced, we workaround this with the following stubs.
*/
#ifdef __lint
void
plat_setprop_enter(void)
{}
void
plat_setprop_exit(void)
{}
#endif
/*
* This 'do-nothing' function is called immediately before and immediately
* after entry to the PROM. Some standalones (e.g. the kernel)
* may replace this routine with their own.
*/
static void
default_prepost_prom(void)
{}
/*
* Every standalone that wants to use this library must call
* prom_init() before any of the other routines can be called.
* The only state it creates is the obp_romvec_version variable,
* and the prom_aligned_allocator variable (plus the default pre-
* and post-prom handlers, and the clientname string)
*
*/
void
prom_init(char *pgmname, void *p1275cookie)
{
/*
* Allow implementation to validate input argument.
*/
p1275cif = p1275_cif_init(p1275cookie);
if ((p1275cif == NULL)) {
prom_fatal_error("promif: No interface!");
/*NOTREACHED*/
}
/*
* Initialize the "clientname" string with the string we've
* been handed by the standalone
*/
(void) prom_strncpy(promif_clntname, pgmname, PROMIF_CLNTNAMELEN - 1);
promif_clntname[PROMIF_CLNTNAMELEN - 1] = '\0';
obp_romvec_version = OBP_PSEUDO_ROMVEC_VERSION;
/*
* Add default pre- and post-prom handlers
* (We add this null handler to avoid the numerous tests
* that would otherwise have to be included around every call)
*/
(void) prom_set_preprom(default_prepost_prom);
(void) prom_set_postprom(default_prepost_prom);
}
/*
* Fatal promif internal error, not an external interface
*/
/*ARGSUSED*/
void
prom_fatal_error(const char *errormsg)
{
volatile int zero = 0;
volatile int i = 1;
/*
* No prom interface, try to cause a trap by
* dividing by zero, leaving the message in %i0.
*/
i = i / zero;
/*NOTREACHED*/
}