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      1 /*	$NetBSD: mainbus.c,v 1.9 2021/08/07 16:18:52 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed by Christopher G. Demetriou
     17  *	for the NetBSD Project.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.9 2021/08/07 16:18:52 thorpej Exp $");
     35 
     36 #include "mainbus.h"
     37 #include "opt_multiprocessor.h"
     38 
     39 #include <sys/param.h>
     40 #include <sys/bus.h>
     41 #include <sys/device.h>
     42 #include <sys/errno.h>
     43 
     44 #include <evbppc/ev64260/ev64260.h>
     45 
     46 #include "locators.h"
     47 
     48 #if NCPU == 0
     49 #error	A cpu device is now required
     50 #endif
     51 
     52 
     53 int	mainbus_match(device_t, cfdata_t, void *);
     54 void	mainbus_attach(device_t, device_t, void *);
     55 int	mainbus_cfprint(void *, const char *);
     56 
     57 CFATTACH_DECL_NEW(mainbus, 0,
     58 	mainbus_match, mainbus_attach, NULL, NULL);
     59 
     60 /*
     61  * Probe for the mainbus; always succeeds.
     62  */
     63 int
     64 mainbus_match(device_t parent, cfdata_t match, void *aux)
     65 {
     66 
     67 	return 1;
     68 }
     69 
     70 /*
     71  * Attach the mainbus.
     72  */
     73 void
     74 mainbus_attach(device_t parent, device_t self, void *aux)
     75 {
     76 	struct mainbus_attach_args mba;
     77 	extern bus_addr_t gt_base;
     78 
     79 	printf("\n");
     80 
     81 	memset(&mba, 0, sizeof(mba));
     82 
     83 	/*
     84 	 * Always find the CPU
     85 	 */
     86 	mba.mba_name = "cpu";
     87 	mba.mba_unit = 0;
     88 	mba.mba_addr = MAINBUSCF_ADDR_DEFAULT;
     89 	config_found(self, &mba, mainbus_cfprint, CFARGS_NONE);
     90 
     91 #ifdef MULTIPROCESSOR
     92 	/*
     93 	 * Try for a second one...
     94 	 */
     95 	mba.mba_name = "cpu";
     96 	mba.mba_unit = 1;
     97 	mba.mba_addr = MAINBUSCF_ADDR_DEFAULT;
     98 	config_found(self, &mba, mainbus_cfprint, CFARGS_NONE);
     99 #endif
    100 
    101 	/*
    102 	 * Now try to configure the Discovery
    103 	 */
    104 	mba.mba_name = "gt";
    105 	mba.mba_unit = -1;
    106 	mba.mba_addr = gt_base;
    107 	config_found(self, &mba, mainbus_cfprint, CFARGS_NONE);
    108 }
    109 
    110 int
    111 mainbus_cfprint(void *aux, const char *pnp)
    112 {
    113 	struct mainbus_attach_args *mba = aux;
    114 
    115 	if (pnp)
    116 		aprint_normal("%s at %s", mba->mba_name, pnp);
    117 	if (mba->mba_unit != -1)
    118 		aprint_normal(" unit %d", mba->mba_unit);
    119 	if (mba->mba_addr != MAINBUSCF_ADDR_DEFAULT)
    120 		aprint_normal(" addr 0x%08x", mba->mba_addr);
    121 	return UNCONF;
    122 }
    123 
    124 
    125 static int	cpu_match(device_t, cfdata_t, void *);
    126 static void	cpu_attach(device_t, device_t, void *);
    127 
    128 CFATTACH_DECL_NEW(cpu, 0, cpu_match, cpu_attach, NULL, NULL);
    129 
    130 int
    131 cpu_match(device_t parent, cfdata_t cf, void *aux)
    132 {
    133 	struct mainbus_attach_args *mba = aux;
    134 
    135 	if (strcmp(mba->mba_name, "cpu") != 0)
    136 		return 0;
    137 
    138 	return 1;
    139 }
    140 
    141 void
    142 cpu_attach(device_t parent, device_t self, void *aux)
    143 {
    144 	struct mainbus_attach_args *mba = aux;
    145 
    146 	(void) cpu_attach_common(self, mba->mba_unit);
    147 }
    148