1 /*- 2 * Copyright (c) 2014 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Andrew Turner under 6 * sponsorship from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <stand.h> 35 #include <efi.h> 36 #include <efilib.h> 37 #include <fdt_platform.h> 38 39 #include "bootstrap.h" 40 41 static EFI_GUID fdtdtb = FDT_TABLE_GUID; 42 43 int 44 fdt_platform_load_dtb(void) 45 { 46 struct fdt_header *hdr; 47 const char *s; 48 49 hdr = efi_get_table(&fdtdtb); 50 if (hdr == NULL) 51 return (1); 52 if (fdt_load_dtb_addr(hdr) != 0) 53 return (1); 54 printf("Using DTB provided by EFI at %p.\n", hdr); 55 56 s = getenv("fdt_overlays"); 57 if (s != NULL && *s != '\0') { 58 printf("Loading DTB overlays: '%s'\n", s); 59 fdt_load_dtb_overlays(s); 60 } 61 62 return (0); 63 } 64 65 void 66 fdt_platform_fixups(void) 67 { 68 69 fdt_apply_overlays(); 70 } 71