1 /* $NetBSD: fdt_bus_machdep.c,v 1.2 2022/10/15 11:07:39 jmcneill 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 1.2 2022/10/15 11:07:39 jmcneill 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 #include <arm/fdt/arm_fdtvar.h> 38 39 extern struct bus_space arm_generic_bs_tag; 40 41 static int 42 nonposted_mmio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag, 43 bus_space_handle_t *bshp) 44 { 45 if (flag == 0) { 46 flag |= BUS_SPACE_MAP_NONPOSTED; 47 } 48 49 return bus_space_map(&arm_generic_bs_tag, bpa, size, flag, bshp); 50 } 51 52 bus_space_tag_t 53 fdtbus_bus_tag_create(int phandle, uint32_t flags) 54 { 55 const struct arm_platform *plat = arm_fdt_platform(); 56 struct bus_space *tagp; 57 struct fdt_attach_args faa; 58 59 plat->ap_init_attach_args(&faa); 60 61 tagp = kmem_alloc(sizeof(*tagp), KM_SLEEP); 62 *tagp = *faa.faa_bst; 63 if ((flags & FDT_BUS_SPACE_FLAG_NONPOSTED_MMIO) != 0) { 64 tagp->bs_map = nonposted_mmio_bs_map; 65 } 66 67 return tagp; 68 } 69