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      1 /*	$NetBSD: consinit.c,v 1.4 2021/03/29 13:14:13 rin Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2006 Jachym Holecek
      5  * All rights reserved.
      6  *
      7  * Written for DFC Design, s.r.o.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  *
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  *
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include "opt_cons.h"
     33 #include "xlcom.h"
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.4 2021/03/29 13:14:13 rin Exp $");
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/device.h>
     41 
     42 #include <sys/bus.h>
     43 
     44 #include <evbppc/virtex/virtex.h>
     45 
     46 #include <dev/cons.h>
     47 
     48 
     49 #if NXLCOM > 0
     50 extern struct consdev 	consdev_xlcom;
     51 void    		xlcom_cninit(struct consdev *, bus_addr_t);
     52 #if defined(KGDB)
     53 void 			xlcom_kgdbinit(void);
     54 #endif
     55 #endif
     56 
     57 bus_space_tag_t 	consdev_iot;
     58 bus_space_handle_t 	consdev_ioh;
     59 
     60 #if defined(KGDB)
     61 bus_space_tag_t 	kgdb_iot;
     62 bus_space_handle_t 	kgdb_ioh;
     63 #endif
     64 
     65 
     66 /*
     67  * Initialize the system console (hmm, as if anyone can see those panics).
     68  */
     69 void
     70 consinit(void)
     71 {
     72 	static int 	initted = 0;
     73 
     74 	if (initted)
     75 		return;
     76 
     77 	/* Pick MD knowledge about console. */
     78 	if (virtex_bus_space_tag(CONS_NAME, &consdev_iot))
     79 		panic("No bus space for %s console", CONS_NAME);
     80 
     81 #if defined(KGDB)
     82 	if (virtex_bus_space_tag(KGDB_NAME, &kgdb_iot))
     83 		panic("No bus space for %s kgdb", KGDB_NAME);
     84 #endif
     85 
     86 #if NXLCOM > 0
     87 #if defined(KGDB)
     88 	if (strncmp("xlcom", KGDB_NAME, 5)) {
     89 		xlcom_kgdbinit();
     90 
     91 		/* Overtake console device, we're higher priority. */
     92 		if (strcmp(KGDB_NAME, CONS_NAME) == 0 &&
     93 		    KGDB_ADDR == CONS_ADDR)
     94 			goto done;
     95 	}
     96 #endif
     97 	if (strncmp("xlcom", CONS_NAME, 5) == 0) {
     98 		cn_tab = &consdev_xlcom;
     99 		xlcom_cninit(cn_tab, CONS_ADDR);
    100 
    101 		goto done;
    102 	}
    103 #endif
    104 
    105 	panic("No console"); 	/* XXX really panic? */
    106  done:
    107 	/* If kgdb overtook console, cn_tab is NULL and dev/cons.c deals. */
    108 	initted = 1;
    109 }
    110