mirror of
https://git.proxmox.com/git/qemu
synced 2025-10-31 13:19:36 +00:00
111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/*
|
|
* Functions to help device tree manipulation using libfdt.
|
|
* It also provides functions to read entries from device tree proc
|
|
* interface.
|
|
*
|
|
* Copyright 2008 IBM Corporation.
|
|
* Authors: Jerone Young <jyoung5@us.ibm.com>
|
|
* Hollis Blanchard <hollisb@us.ibm.com>
|
|
*
|
|
* This work is licensed under the GNU GPL license version 2 or later.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "config.h"
|
|
#include "qemu-common.h"
|
|
#include "sysemu.h"
|
|
#include "device_tree.h"
|
|
#include "hw/loader.h"
|
|
|
|
#include <libfdt.h>
|
|
|
|
void *load_device_tree(const char *filename_path, int *sizep)
|
|
{
|
|
int dt_size;
|
|
int dt_file_load_size;
|
|
int ret;
|
|
void *fdt = NULL;
|
|
|
|
*sizep = 0;
|
|
dt_size = get_image_size(filename_path);
|
|
if (dt_size < 0) {
|
|
printf("Unable to get size of device tree file '%s'\n",
|
|
filename_path);
|
|
goto fail;
|
|
}
|
|
|
|
/* Expand to 2x size to give enough room for manipulation. */
|
|
dt_size *= 2;
|
|
/* First allocate space in qemu for device tree */
|
|
fdt = qemu_mallocz(dt_size);
|
|
|
|
dt_file_load_size = load_image(filename_path, fdt);
|
|
if (dt_file_load_size < 0) {
|
|
printf("Unable to open device tree file '%s'\n",
|
|
filename_path);
|
|
goto fail;
|
|
}
|
|
|
|
ret = fdt_open_into(fdt, fdt, dt_size);
|
|
if (ret) {
|
|
printf("Unable to copy device tree in memory\n");
|
|
goto fail;
|
|
}
|
|
|
|
/* Check sanity of device tree */
|
|
if (fdt_check_header(fdt)) {
|
|
printf ("Device tree file loaded into memory is invalid: %s\n",
|
|
filename_path);
|
|
goto fail;
|
|
}
|
|
*sizep = dt_size;
|
|
return fdt;
|
|
|
|
fail:
|
|
qemu_free(fdt);
|
|
return NULL;
|
|
}
|
|
|
|
int qemu_devtree_setprop(void *fdt, const char *node_path,
|
|
const char *property, uint32_t *val_array, int size)
|
|
{
|
|
int offset;
|
|
|
|
offset = fdt_path_offset(fdt, node_path);
|
|
if (offset < 0)
|
|
return offset;
|
|
|
|
return fdt_setprop(fdt, offset, property, val_array, size);
|
|
}
|
|
|
|
int qemu_devtree_setprop_cell(void *fdt, const char *node_path,
|
|
const char *property, uint32_t val)
|
|
{
|
|
int offset;
|
|
|
|
offset = fdt_path_offset(fdt, node_path);
|
|
if (offset < 0)
|
|
return offset;
|
|
|
|
return fdt_setprop_cell(fdt, offset, property, val);
|
|
}
|
|
|
|
int qemu_devtree_setprop_string(void *fdt, const char *node_path,
|
|
const char *property, const char *string)
|
|
{
|
|
int offset;
|
|
|
|
offset = fdt_path_offset(fdt, node_path);
|
|
if (offset < 0)
|
|
return offset;
|
|
|
|
return fdt_setprop_string(fdt, offset, property, string);
|
|
}
|