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/*-
* Copyright (C) 2014-2015 Nathan Whitehorn
* All rights reserved.
*
* 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 <stand.h>
#include <sys/param.h>
#include <fdt_platform.h>
#include <openfirm.h>
#include <libfdt.h>
#include "bootstrap.h"
extern int command_fdt_internal(int argc, char *argv[]);
static int
OF_hasprop(phandle_t node, const char *prop)
{
return (OF_getproplen(node, (char *)prop) > 0);
}
static void
add_node_to_fdt(void *buffer, phandle_t node, int fdt_offset)
{
int i, child_offset, error;
char name[255], *lastprop, *subname;
void *propbuf;
ssize_t proplen;
lastprop = NULL;
while (OF_nextprop(node, lastprop, name) > 0) {
proplen = OF_getproplen(node, name);
/* Detect and correct for errors and strangeness */
if (proplen < 0)
proplen = 0;
if (proplen > 1024)
proplen = 1024;
propbuf = malloc(proplen);
if (propbuf == NULL) {
printf("Cannot allocate memory for prop %s\n", name);
return;
}
OF_getprop(node, name, propbuf, proplen);
error = fdt_setprop(buffer, fdt_offset, name, propbuf, proplen);
free(propbuf);
lastprop = name;
if (error)
printf("Error %d adding property %s to "
"node %d\n", error, name, fdt_offset);
}
if (!OF_hasprop(node, "phandle") && !OF_hasprop(node, "linux,phandle")
&& !OF_hasprop(node, "ibm,phandle"))
fdt_setprop(buffer, fdt_offset, "phandle", &node, sizeof(node));
for (node = OF_child(node); node > 0; node = OF_peer(node)) {
OF_package_to_path(node, name, sizeof(name));
subname = strrchr(name, '/');
subname++;
child_offset = fdt_add_subnode(buffer, fdt_offset, subname);
if (child_offset < 0) {
printf("Error %d adding node %s (%s), skipping\n",
child_offset, name, subname);
continue;
}
add_node_to_fdt(buffer, node, child_offset);
}
}
static void
ofwfdt_fixups(void *fdtp)
{
int offset, len, i;
phandle_t node;
ihandle_t rtas;
const void *prop;
/*
* Instantiate and add reservations for RTAS state if present
*/
offset = fdt_path_offset(fdtp, "/rtas");
if (offset > 0) {
uint32_t base;
void *rtasmem;
char path[255];
node = OF_finddevice("/rtas");
OF_package_to_path(node, path, sizeof(path));
OF_getprop(node, "rtas-size", &len, sizeof(len));
/* Allocate memory */
rtasmem = OF_claim(0, len, 4096);
/* Instantiate RTAS */
rtas = OF_open(path);
base = 0;
OF_call_method("instantiate-rtas", rtas, 1, 1, (cell_t)rtas,
&base);
/* Store info to FDT using Linux convention */
base = cpu_to_fdt32(base);
fdt_setprop(fdtp, offset, "linux,rtas-entry", &base,
sizeof(base));
base = cpu_to_fdt32((uint32_t)rtasmem);
offset = fdt_path_offset(fdtp, "/rtas");
fdt_setprop(fdtp, offset, "linux,rtas-base", &base,
sizeof(base));
/* Mark RTAS private data area reserved */
fdt_add_mem_rsv(fdtp, base, len);
} else {
/*
* Remove /memory/available properties, which reflect long-gone
* OF state. Note that this doesn't work if we need RTAS still,
* since that's part of the firmware.
*/
offset = fdt_path_offset(fdtp, "/memory@0");
if (offset > 0)
fdt_delprop(fdtp, offset, "available");
}
/*
* Convert stored ihandles under /chosen to xref phandles
*/
offset = fdt_path_offset(fdtp, "/chosen");
if (offset > 0) {
const char *chosenprops[] = {"stdout", "stdin", "mmu", "cpu",
NULL};
const uint32_t *ihand;
for (i = 0; chosenprops[i] != NULL; i++) {
ihand = fdt_getprop(fdtp, offset, chosenprops[i], &len);
if (ihand != NULL && len == sizeof(*ihand)) {
node = OF_instance_to_package(
fdt32_to_cpu(*ihand));
if (OF_hasprop(node, "phandle"))
OF_getprop(node, "phandle", &node,
sizeof(node));
else if (OF_hasprop(node, "linux,phandle"))
OF_getprop(node, "linux,phandle", &node,
sizeof(node));
else if (OF_hasprop(node, "ibm,phandle"))
OF_getprop(node, "ibm,phandle", &node,
sizeof(node));
node = cpu_to_fdt32(node);
fdt_setprop(fdtp, offset, chosenprops[i], &node,
sizeof(node));
}
/* Refind node in case it moved */
offset = fdt_path_offset(fdtp, "/chosen");
}
}
}
int
fdt_platform_load_dtb(void)
{
void *buffer;
size_t buflen = 409600;
buffer = malloc(buflen);
fdt_create_empty_tree(buffer, buflen);
add_node_to_fdt(buffer, OF_peer(0), fdt_path_offset(buffer, "/"));
ofwfdt_fixups(buffer);
fdt_pack(buffer);
fdt_load_dtb_addr(buffer);
free(buffer);
return (0);
}
void
fdt_platform_load_overlays(void)
{
}
void
fdt_platform_fixups(void)
{
}
static int
command_fdt(int argc, char *argv[])
{
return (command_fdt_internal(argc, argv));
}
COMMAND_SET(fdt, "fdt", "flattened device tree handling", command_fdt);
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