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      1 /*	$NetBSD: rump_autoconf.c,v 1.3 2021/08/07 16:19:18 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2009 Antti Kantee.  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  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: rump_autoconf.c,v 1.3 2021/08/07 16:19:18 thorpej Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/device.h>
     33 #include <sys/kernel.h>
     34 
     35 static int	mainbus_match(device_t, cfdata_t, void *);
     36 static void	mainbus_attach(device_t, device_t, void *);
     37 static int	mainbus_search(device_t, cfdata_t, const int *, void *);
     38 
     39 struct mainbus_softc {
     40 	int mb_nada;
     41 };
     42 
     43 /*
     44  * Initial lists as required by autoconf(9).  The data from ioconf.c
     45  * is patched in by rump_mainbus_init().
     46  */
     47 const struct cfattachinit cfattachinit[] = {
     48 	{ NULL, NULL },
     49 };
     50 struct cfdata cfdata[] = {
     51 	{ NULL, NULL, 0, FSTATE_NOTFOUND, NULL, 0, NULL}, /* replaced by init */
     52 	{ NULL, NULL, 0, FSTATE_NOTFOUND, NULL, 0, NULL},
     53 };
     54 struct cfdriver * const cfdriver_list_initial[] = {
     55 	NULL,
     56 };
     57 
     58 #include "ioconf.c"
     59 
     60 CFATTACH_DECL_NEW(mainbus, sizeof(struct mainbus_softc),
     61 	mainbus_match, mainbus_attach, NULL, NULL);
     62 
     63 const short cfroots[] = {
     64 	0, /* mainbus */
     65 	-1
     66 };
     67 
     68 /* actually used */
     69 #define MAXPDEVS 256
     70 struct pdevinit pdevinit[MAXPDEVS] = {{NULL,0}, }; /* XXX: static limit */
     71 static int pdev_total = 0;
     72 
     73 #include <rump-sys/dev.h>
     74 
     75 void
     76 rump_pdev_add(void (*pdev_attach)(int), int pdev_count)
     77 {
     78 	struct pdevinit *pdev_new;
     79 
     80 	KASSERT(cold);
     81 
     82 	pdev_new = &pdevinit[pdev_total];
     83 	pdev_new->pdev_attach = pdev_attach;
     84 	pdev_new->pdev_count = pdev_count;
     85 
     86 	pdev_total++;
     87 	KASSERT(pdev_total < MAXPDEVS);
     88 }
     89 
     90 void
     91 rump_pdev_finalize()
     92 {
     93 
     94 	rump_pdev_add(NULL, 0);
     95 }
     96 
     97 static int
     98 mainbus_match(device_t parent, cfdata_t match, void *aux)
     99 {
    100 
    101 	return 1;
    102 }
    103 
    104 static void
    105 mainbus_attach(device_t parent, device_t self, void *aux)
    106 {
    107 
    108 	aprint_normal("\n");
    109 	config_search(self, NULL,
    110 	    CFARGS(.search = mainbus_search,
    111 		   .iattr = "mainbus"));
    112 }
    113 
    114 static int
    115 mainbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
    116 {
    117 	struct mainbus_attach_args maa;
    118 
    119 	maa.maa_unit = cf->cf_unit;
    120 	if (config_probe(parent, cf, &maa))
    121 		config_attach(parent, cf, &maa, NULL, CFARGS_NONE);
    122 
    123 	return 0;
    124 }
    125 
    126 void
    127 rump_mainbus_init(void)
    128 {
    129 
    130 	/* replace cfdata[0] to a state expected by autoconf(9) */
    131 	memcpy(&cfdata[0], &cfdata_ioconf_mainbus[0], sizeof(cfdata[0]));
    132 }
    133 
    134 void
    135 rump_mainbus_attach(void)
    136 {
    137 	const struct cfattachinit *cfai = &cfattach_ioconf_mainbus[0];
    138 
    139 	config_cfdata_attach(cfdata, 0);
    140 	config_cfdriver_attach(cfdriver_ioconf_mainbus[0]);
    141 	config_cfattach_attach(cfai->cfai_name, cfai->cfai_list[0]);
    142 }
    143