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sys/arm64/ofw/ofw_initrd.c
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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. | |||||
*/ | |||||
/* | |||||
* The pupose of this is to support U-boot managed FreeBSD bootup by using | |||||
* only binary images, without any device with a partition table. | |||||
andrew: No need for `__FBSDID`, and `cdefs.h` can be removed as it's only needed for the macro. | |||||
* | |||||
* This functionality has been ported from sys/powerpc/ofw/ofw_initrd.c | |||||
* | |||||
* Please find an example U-boot usage below: | |||||
* | |||||
* setenv kernel_comp_addr_r 0x3000000 | |||||
* setenv kernel_comp_size 0x04000000 | |||||
* setenv fdt_addr_r 0x2000000 | |||||
* dhcp | |||||
* tftp $fdt_addr_r rk3328-rock64.dtb | |||||
* tftp $kernel_addr_r kernel.bin.gz | |||||
* setenv ramdisk_addr_r 0x07000000 | |||||
* tftp $ramdisk_addr_r mfsroot | |||||
* fdt addr $fdt_addr_r | |||||
* fdt chosen $ramdisk_addr_r $filesize | |||||
* booti $kernel_addr_r - $fdt_addr_r | |||||
* | |||||
* The "fdt chosen" command above embeds ramdisk setting into the actual fdt tree. | |||||
* | |||||
* The "mfsroot" image is an uncompressed UFS disk image. | |||||
* | |||||
* FreeBSD boot log should be like the following: | |||||
* | |||||
* md0: Embedded image 11534336 bytes at 0xffffa0007c42b000 | |||||
* | |||||
* mountroot> ? | |||||
* | |||||
* List of GEOM managed disk devices: | |||||
* ufsid/6416031dd9f2971da ufsid/6416031dd9f2971d md0a md0 | |||||
*/ | |||||
#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 <machine/vmparam.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; | |||||
Done Inline ActionsA space is needed here after u_char imp: A space is needed here after u_char
| |||||
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); | |||||
mfs_root = taste; | |||||
mfs_root_size = end - start; | |||||
printf("ofw_initrd: initrd loaded at 0x%08lx-0x%08lx\n", | |||||
start, end); | |||||
} | |||||
} |
No need for __FBSDID, and cdefs.h can be removed as it's only needed for the macro.