1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | |
3 | #include <linux/init.h> |
4 | #include <linux/of_fdt.h> |
5 | #include <linux/printk.h> |
6 | #include <linux/memblock.h> |
7 | #include <init.h> |
8 | |
9 | #include "um_arch.h" |
10 | |
11 | static char *dtb __initdata; |
12 | |
13 | void uml_dtb_init(void) |
14 | { |
15 | long long size; |
16 | void *area; |
17 | |
18 | area = uml_load_file(filename: dtb, size: &size); |
19 | if (area) { |
20 | if (!early_init_dt_scan(params: area)) { |
21 | pr_err("invalid DTB %s\n", dtb); |
22 | memblock_free(ptr: area, size); |
23 | return; |
24 | } |
25 | |
26 | early_init_fdt_scan_reserved_mem(); |
27 | } |
28 | |
29 | unflatten_device_tree(); |
30 | } |
31 | |
32 | static int __init uml_dtb_setup(char *line, int *add) |
33 | { |
34 | dtb = line; |
35 | return 0; |
36 | } |
37 | |
38 | __uml_setup("dtb=", uml_dtb_setup, |
39 | "dtb=<file>\n" |
40 | " Boot the kernel with the devicetree blob from the specified file.\n" |
41 | ); |
42 |