112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/*-
|
|
* 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/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#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);
|
|
}
|
|
}
|