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/*-
* Copyright (C) 2014 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 <sys/types.h>
#include <fdt_platform.h>
#include <libfdt.h>
#include "bootstrap.h"
#include "host_syscall.h"
static void
add_node_to_fdt(void *buffer, const char *path, int fdt_offset)
{
int child_offset, fd, pfd, error, dentsize;
char subpath[512];
void *propbuf;
ssize_t proplen;
struct host_dent {
unsigned long d_fileno;
unsigned long d_off;
unsigned short d_reclen;
char d_name[];
/* uint8_t d_type; */
};
char dents[2048];
struct host_dent *dent;
int d_type;
fd = host_open(path, O_RDONLY, 0);
while (1) {
dentsize = host_getdents(fd, dents, sizeof(dents));
if (dentsize <= 0)
break;
for (dent = (struct host_dent *)dents;
(char *)dent < dents + dentsize;
dent = (struct host_dent *)((void *)dent + dent->d_reclen)) {
sprintf(subpath, "%s/%s", path, dent->d_name);
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0)
continue;
d_type = *((char *)(dent) + dent->d_reclen - 1);
if (d_type == 4 /* DT_DIR */) {
child_offset = fdt_add_subnode(buffer, fdt_offset,
dent->d_name);
if (child_offset < 0) {
printf("Error %d adding node %s/%s, skipping\n",
child_offset, path, dent->d_name);
continue;
}
add_node_to_fdt(buffer, subpath, child_offset);
} else {
propbuf = malloc(1024);
proplen = 0;
pfd = host_open(subpath, O_RDONLY, 0);
if (pfd > 0) {
proplen = host_read(pfd, propbuf, 1024);
host_close(pfd);
}
error = fdt_setprop(buffer, fdt_offset, dent->d_name,
propbuf, proplen);
free(propbuf);
if (error)
printf("Error %d adding property %s to "
"node %d\n", error, dent->d_name,
fdt_offset);
}
}
}
host_close(fd);
}
/* Fix up wrong values added to the device tree by prom_init() in Linux */
static void
fdt_linux_fixups(void *fdtp)
{
int offset, len;
const void *prop;
/*
* Remove /memory/available properties, which reflect long-gone OF
* state
*/
offset = fdt_path_offset(fdtp, "/memory@0");
if (offset > 0)
fdt_delprop(fdtp, offset, "available");
/*
* Add reservations for OPAL and RTAS state if present
*/
offset = fdt_path_offset(fdtp, "/ibm,opal");
if (offset > 0) {
const uint64_t *base, *size;
base = fdt_getprop(fdtp, offset, "opal-base-address",
&len);
size = fdt_getprop(fdtp, offset, "opal-runtime-size",
&len);
if (base != NULL && size != NULL)
fdt_add_mem_rsv(fdtp, fdt64_to_cpu(*base),
fdt64_to_cpu(*size));
}
offset = fdt_path_offset(fdtp, "/rtas");
if (offset > 0) {
const uint32_t *base, *size;
base = fdt_getprop(fdtp, offset, "linux,rtas-base", &len);
size = fdt_getprop(fdtp, offset, "rtas-size", &len);
if (base != NULL && size != NULL)
fdt_add_mem_rsv(fdtp, fdt32_to_cpu(*base),
fdt32_to_cpu(*size));
}
/*
* Patch up /chosen nodes so that the stored handles mean something,
* where possible.
*/
offset = fdt_path_offset(fdtp, "/chosen");
if (offset > 0) {
fdt_delprop(fdtp, offset, "cpu"); /* This node not meaningful */
offset = fdt_path_offset(fdtp, "/chosen");
prop = fdt_getprop(fdtp, offset, "linux,stdout-package", &len);
if (prop != NULL) {
fdt_setprop(fdtp, offset, "stdout", prop, len);
offset = fdt_path_offset(fdtp, "/chosen");
fdt_setprop(fdtp, offset, "stdin", prop, len);
}
}
}
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, "/proc/device-tree",
fdt_path_offset(buffer, "/"));
fdt_linux_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)
{
}
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