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- /*-
- * Copyright (C) 2018 Breno Leitao
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <sys/param.h>
- #include <sys/kernel.h>
- #include <sys/systm.h>
- #include <sys/module.h>
- #include <sys/types.h>
- #include <sys/proc.h>
- #include <vm/vm.h>
- #include <vm/pmap.h>
- #include <machine/bus.h>
- #include <machine/elf.h>
- #include <machine/param.h>
- #include <dev/ofw/openfirm.h>
- #include <dev/ofw/ofw_bus.h>
- #include <dev/ofw/ofw_bus_subr.h>
- #include "opt_md.h"
- extern u_char *mfs_root;
- extern int mfs_root_size;
- static void ofw_initrd_probe_and_attach(void *junk);
- SYSINIT(ofw_initrd_probe_and_attach, SI_SUB_KMEM, SI_ORDER_ANY,
- ofw_initrd_probe_and_attach, NULL);
- static void
- ofw_initrd_probe_and_attach(void *junk)
- {
- phandle_t chosen;
- vm_paddr_t start, end;
- pcell_t cell[2];
- ssize_t size;
- u_char *taste;
- Elf_Ehdr ehdr;
- if (!hw_direct_map)
- return;
- chosen = OF_finddevice("/chosen");
- if (chosen <= 0)
- return;
- if (!OF_hasprop(chosen, "linux,initrd-start") ||
- !OF_hasprop(chosen, "linux,initrd-end"))
- return;
- size = OF_getencprop(chosen, "linux,initrd-start", cell, sizeof(cell));
- if (size == 4)
- start = cell[0];
- else if (size == 8)
- start = (uint64_t)cell[0] << 32 | cell[1];
- else {
- printf("ofw_initrd: Wrong linux,initrd-start size\n");
- return;
- }
- size = OF_getencprop(chosen, "linux,initrd-end", cell, sizeof(cell));
- if (size == 4)
- end = cell[0];
- else if (size == 8)
- end = (uint64_t)cell[0] << 32 | cell[1];
- else{
- printf("ofw_initrd: Wrong linux,initrd-end size\n");
- return;
- }
- if (end - start > 0) {
- taste = (u_char*) PHYS_TO_DMAP(start);
- memcpy(&ehdr, taste, sizeof(ehdr));
- if (IS_ELF(ehdr)) {
- printf("ofw_initrd: initrd is kernel image!\n");
- return;
- }
- mfs_root = taste;
- mfs_root_size = end - start;
- printf("ofw_initrd: initrd loaded at 0x%08lx-0x%08lx\n",
- start, end);
- }
- }
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