2 * Copyright (C) 2018 Breno Leitao
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
18 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
19 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
20 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
21 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
22 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
28 #include <sys/param.h>
29 #include <sys/kernel.h>
30 #include <sys/systm.h>
31 #include <sys/module.h>
32 #include <sys/types.h>
38 #include <machine/bus.h>
40 #include <dev/ofw/openfirm.h>
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
46 extern u_char *mfs_root;
47 extern int mfs_root_size;
49 static void ofw_initrd_probe_and_attach(void *junk);
51 SYSINIT(ofw_initrd_probe_and_attach, SI_SUB_KMEM, SI_ORDER_ANY,
52 ofw_initrd_probe_and_attach, NULL);
55 ofw_initrd_probe_and_attach(void *junk)
58 vm_paddr_t start, end;
65 chosen = OF_finddevice("/chosen");
69 if (!OF_hasprop(chosen, "linux,initrd-start") ||
70 !OF_hasprop(chosen, "linux,initrd-end"))
73 size = OF_getencprop(chosen, "linux,initrd-start", cell, sizeof(cell));
77 start = (uint64_t)cell[0] << 32 | cell[1];
79 printf("ofw_initrd: Wrong linux,initrd-start size\n");
83 size = OF_getencprop(chosen, "linux,initrd-end", cell, sizeof(cell));
87 end = (uint64_t)cell[0] << 32 | cell[1];
89 printf("ofw_initrd: Wrong linux,initrd-end size\n");
93 if (end - start > 0) {
94 mfs_root = (u_char *) PHYS_TO_DMAP(start);
95 mfs_root_size = end - start;
96 printf("ofw_initrd: initrd loaded at 0x%08lx-0x%08lx\n",