1 /* $NetBSD: fdt_bus_machdep.c,v 1.3 2023/04/07 08:55:31 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2021 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: fdt_bus_machdep.c,v 1.3 2023/04/07 08:55:31 skrll Exp $");
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/kmem.h>
35
36 #include <dev/fdt/fdtvar.h>
37
38 #include <arm/fdt/arm_fdtvar.h>
39
40 extern struct bus_space arm_generic_bs_tag;
41
42 static int
nonposted_mmio_bs_map(void * t,bus_addr_t bpa,bus_size_t size,int flag,bus_space_handle_t * bshp)43 nonposted_mmio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
44 bus_space_handle_t *bshp)
45 {
46 if (flag == 0) {
47 flag |= BUS_SPACE_MAP_NONPOSTED;
48 }
49
50 return bus_space_map(&arm_generic_bs_tag, bpa, size, flag, bshp);
51 }
52
53 bus_space_tag_t
fdtbus_bus_tag_create(int phandle,uint32_t flags)54 fdtbus_bus_tag_create(int phandle, uint32_t flags)
55 {
56 const struct fdt_platform *plat = fdt_platform_find();
57 struct bus_space *tagp;
58 struct fdt_attach_args faa;
59
60 plat->fp_init_attach_args(&faa);
61
62 tagp = kmem_alloc(sizeof(*tagp), KM_SLEEP);
63 *tagp = *faa.faa_bst;
64 if ((flags & FDT_BUS_SPACE_FLAG_NONPOSTED_MMIO) != 0) {
65 tagp->bs_map = nonposted_mmio_bs_map;
66 }
67
68 return tagp;
69 }
70