1*beecddb6Sthorpej /* $NetBSD: obmem.c,v 1.21 2021/08/07 16:19:06 thorpej Exp $ */
2ec984a04Sfredette
3ec984a04Sfredette /*-
4ec984a04Sfredette * Copyright (c) 1996 The NetBSD Foundation, Inc.
5ec984a04Sfredette * All rights reserved.
6ec984a04Sfredette *
7ec984a04Sfredette * This code is derived from software contributed to The NetBSD Foundation
8ec984a04Sfredette * by Adam Glass, Gordon W. Ross, and Matthew Fredette.
9ec984a04Sfredette *
10ec984a04Sfredette * Redistribution and use in source and binary forms, with or without
11ec984a04Sfredette * modification, are permitted provided that the following conditions
12ec984a04Sfredette * are met:
13ec984a04Sfredette * 1. Redistributions of source code must retain the above copyright
14ec984a04Sfredette * notice, this list of conditions and the following disclaimer.
15ec984a04Sfredette * 2. Redistributions in binary form must reproduce the above copyright
16ec984a04Sfredette * notice, this list of conditions and the following disclaimer in the
17ec984a04Sfredette * documentation and/or other materials provided with the distribution.
18ec984a04Sfredette *
19ec984a04Sfredette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20ec984a04Sfredette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21ec984a04Sfredette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22ec984a04Sfredette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23ec984a04Sfredette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24ec984a04Sfredette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25ec984a04Sfredette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26ec984a04Sfredette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27ec984a04Sfredette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28ec984a04Sfredette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29ec984a04Sfredette * POSSIBILITY OF SUCH DAMAGE.
30ec984a04Sfredette */
31ec984a04Sfredette
32ed517291Slukem #include <sys/cdefs.h>
33*beecddb6Sthorpej __KERNEL_RCSID(0, "$NetBSD: obmem.c,v 1.21 2021/08/07 16:19:06 thorpej Exp $");
34ed517291Slukem
35ec984a04Sfredette #include <sys/param.h>
36ec984a04Sfredette #include <sys/systm.h>
37ec984a04Sfredette #include <sys/device.h>
38ec984a04Sfredette
39ec984a04Sfredette #include <uvm/uvm_extern.h>
40ec984a04Sfredette
41ec984a04Sfredette #include <machine/autoconf.h>
42ec984a04Sfredette #include <machine/pmap.h>
43ec984a04Sfredette
44ec984a04Sfredette #include <sun2/sun2/control.h>
45ec984a04Sfredette #include <sun2/sun2/machdep.h>
46ec984a04Sfredette
47bc6f8d14Stsutsui static int obmem_match(device_t, cfdata_t, void *);
48bc6f8d14Stsutsui static void obmem_attach(device_t, device_t, void *);
49ec984a04Sfredette
50ec984a04Sfredette struct obmem_softc {
51bc6f8d14Stsutsui device_t sc_dev; /* base device */
52ec984a04Sfredette bus_space_tag_t sc_bustag; /* parent bus tag */
53ec984a04Sfredette bus_dma_tag_t sc_dmatag; /* parent bus dma tag */
54ec984a04Sfredette };
55ec984a04Sfredette
56bc6f8d14Stsutsui CFATTACH_DECL_NEW(obmem, sizeof(struct obmem_softc),
574bf871a7Sthorpej obmem_match, obmem_attach, NULL, NULL);
58ec984a04Sfredette
590ded7469Schs static int obmem_attached;
600ded7469Schs
6110b1a7beSchs static paddr_t obmem_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t,
6210b1a7beSchs off_t, int, int);
6310b1a7beSchs static int _obmem_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t,
6410b1a7beSchs bus_size_t, int, vaddr_t, bus_space_handle_t *);
65ec984a04Sfredette
668f6cff26Sfredette static struct sun68k_bus_space_tag obmem_space_tag = {
67ec984a04Sfredette NULL, /* cookie */
68ec984a04Sfredette NULL, /* parent bus tag */
69ec984a04Sfredette _obmem_bus_map, /* bus_space_map */
70ec984a04Sfredette NULL, /* bus_space_unmap */
71ec984a04Sfredette NULL, /* bus_space_subregion */
72ec984a04Sfredette NULL, /* bus_space_barrier */
73ec984a04Sfredette obmem_bus_mmap, /* bus_space_mmap */
748f6cff26Sfredette NULL, /* bus_intr_establish */
758f6cff26Sfredette NULL, /* bus_space_peek_N */
768f6cff26Sfredette NULL /* bus_space_poke_N */
77ec984a04Sfredette };
78ec984a04Sfredette
79ec984a04Sfredette static int
obmem_match(device_t parent,cfdata_t cf,void * aux)80c701b867Stsutsui obmem_match(device_t parent, cfdata_t cf, void *aux)
81ec984a04Sfredette {
82ee7503cfSfredette struct mainbus_attach_args *ma = aux;
83ec984a04Sfredette
840ded7469Schs if (obmem_attached)
850ded7469Schs return 0;
860ded7469Schs
87bc6f8d14Stsutsui return ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0;
88ec984a04Sfredette }
89ec984a04Sfredette
90ec984a04Sfredette static void
obmem_attach(device_t parent,device_t self,void * aux)91bc6f8d14Stsutsui obmem_attach(device_t parent, device_t self, void *aux)
92ec984a04Sfredette {
93ee7503cfSfredette struct mainbus_attach_args *ma = aux;
94bc6f8d14Stsutsui struct obmem_softc *sc = device_private(self);
95ee7503cfSfredette struct obmem_attach_args obma;
96ec984a04Sfredette const char *const *cpp;
97ec984a04Sfredette static const char *const special[] = {
98ec984a04Sfredette /* find these first */
99ec984a04Sfredette NULL
100ec984a04Sfredette };
101ec984a04Sfredette
1020ded7469Schs obmem_attached = 1;
1030ded7469Schs
104bc6f8d14Stsutsui sc->sc_dev = self;
105bc6f8d14Stsutsui aprint_normal("\n");
106ec984a04Sfredette
107ee7503cfSfredette sc->sc_bustag = ma->ma_bustag;
108ee7503cfSfredette sc->sc_dmatag = ma->ma_dmatag;
109ec984a04Sfredette
110ec984a04Sfredette obmem_space_tag.cookie = sc;
111ec984a04Sfredette obmem_space_tag.parent = sc->sc_bustag;
112ec984a04Sfredette
113ec984a04Sfredette /*
114ec984a04Sfredette * Prepare the skeleton attach arguments for our devices.
115ec984a04Sfredette * The values we give in the locators are indications to
1168f6cff26Sfredette * sun68k_bus_search about which locators must and must not
117ec984a04Sfredette * be defined.
118ec984a04Sfredette */
119ee7503cfSfredette obma = *ma;
120ee7503cfSfredette obma.obma_bustag = &obmem_space_tag;
12174e4ac42Sfredette obma.obma_paddr = LOCATOR_REQUIRED;
122ee7503cfSfredette obma.obma_pri = LOCATOR_OPTIONAL;
123ec984a04Sfredette
124ec984a04Sfredette /* Find all `early' obmem devices */
125ec984a04Sfredette for (cpp = special; *cpp != NULL; cpp++) {
126ee7503cfSfredette obma.obma_name = *cpp;
1273bee0c11Sthorpej config_search(self, &obma,
128*beecddb6Sthorpej CFARGS(.search = sun68k_bus_search));
129ec984a04Sfredette }
130ec984a04Sfredette
131ec984a04Sfredette /* Find all other obmem devices */
132ee7503cfSfredette obma.obma_name = NULL;
1333bee0c11Sthorpej config_search(self, &obma,
134*beecddb6Sthorpej CFARGS(.search = sun68k_bus_search));
135ec984a04Sfredette }
136ec984a04Sfredette
137ec984a04Sfredette int
_obmem_bus_map(bus_space_tag_t t,bus_type_t btype,bus_addr_t paddr,bus_size_t size,int flags,vaddr_t vaddr,bus_space_handle_t * hp)13810b1a7beSchs _obmem_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr,
13910b1a7beSchs bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp)
140ec984a04Sfredette {
141ec984a04Sfredette struct obmem_softc *sc = t->cookie;
142ec984a04Sfredette
143bc6f8d14Stsutsui return bus_space_map2(sc->sc_bustag, PMAP_OBMEM, paddr,
144bc6f8d14Stsutsui size, flags, vaddr, hp);
145ec984a04Sfredette }
146ec984a04Sfredette
147a5c8b5d1Sfredette paddr_t
obmem_bus_mmap(bus_space_tag_t t,bus_type_t btype,bus_addr_t paddr,off_t off,int prot,int flags)14810b1a7beSchs obmem_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off,
14910b1a7beSchs int prot, int flags)
150ec984a04Sfredette {
151ec984a04Sfredette struct obmem_softc *sc = t->cookie;
152ec984a04Sfredette
153bc6f8d14Stsutsui return bus_space_mmap2(sc->sc_bustag, PMAP_OBMEM, paddr, off,
154bc6f8d14Stsutsui prot, flags);
155ec984a04Sfredette }
156