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mainbus.c revision 1.2 
      1 /* $NetBSD: mainbus.c,v 1.2 2021/02/15 22:39:46 reinoud Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Simon Burge.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.2 2021/02/15 22:39:46 reinoud Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/device.h>
     37 
     38 #include <evbmips/mipssim/autoconf.h>
     39 #include <evbmips/mipssim/mipssimreg.h>
     40 #include <evbmips/mipssim/mipssimvar.h>
     41 
     42 static int	mainbus_match(device_t, cfdata_t, void *);
     43 static void	mainbus_attach(device_t, device_t, void *);
     44 static int	mainbus_print(void *, const char *);
     45 
     46 CFATTACH_DECL_NEW(mainbus, 0,
     47     mainbus_match, mainbus_attach, NULL, NULL);
     48 
     49 /* There can be only one. */
     50 static int	mainbus_found;
     51 
     52 struct mainbusdev {
     53 	const char *md_name;
     54 	paddr_t md_addr;
     55 	int md_irq;
     56 };
     57 
     58 static struct mainbusdev mainbusdevs[] = {
     59 	{ "cpu",					},
     60 	{ "com",	MIPSSIM_UART0_ADDR,	2	},
     61 #ifdef notyet
     62 	{ "mipsnet",	MIPSSIM_MIPSNET0_ADDR,	0	},
     63 #endif
     64 	{ NULL,		}
     65 };
     66 
     67 static int
     68 mainbus_match(device_t parent, cfdata_t match, void *aux)
     69 {
     70 
     71 	if (mainbus_found)
     72 		return (0);
     73 
     74 	return (1);
     75 }
     76 
     77 static void
     78 mainbus_attach(device_t parent, device_t self, void *aux)
     79 {
     80 	struct mainbus_attach_args maa;
     81 	struct mipssim_config *mcp = &mipssim_configuration;
     82 	const struct mainbusdev *md;
     83 
     84 	mainbus_found = 1;
     85 	printf("\n");
     86 
     87 	/* attach children */
     88 	for (md = mainbusdevs; md->md_name != NULL; md++) {
     89 		maa.ma_name = md->md_name;
     90 		maa.ma_addr = md->md_addr;
     91 		maa.ma_irq = md->md_irq;
     92 		maa.ma_iot = &mcp->mc_iot;
     93 		maa.ma_dmat = &mcp->mc_dmat;
     94 		config_found_ia(self, "mainbus", &maa, mainbus_print);
     95 	}
     96 
     97 	/* attach virtio children */
     98 	for (int i = 0; i < VIRTIO_NUM_TRANSPORTS; i++) {
     99 		maa.ma_name = "virtio";
    100 		maa.ma_addr = MIPSSIM_VIRTIO_ADDR + VIRTIO_STRIDE * i;
    101 		maa.ma_irq  = 1;
    102 		maa.ma_iot  = &mcp->mc_iot;
    103 		maa.ma_dmat = &mcp->mc_dmat;
    104 		config_found_ia(self, "mainbus", &maa, mainbus_print);
    105 	}
    106 }
    107 
    108 static int
    109 mainbus_print(void *aux, const char *pnp)
    110 {
    111 
    112 	return (QUIET);
    113 }
    114