]> Git Repo - J-linux.git/blob - arch/um/kernel/dtb.c
Merge tag 'kbuild-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy...
[J-linux.git] / arch / um / kernel / dtb.c
1 // SPDX-License-Identifier: GPL-2.0-only
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(dtb, &size);
19         if (area) {
20                 if (!early_init_dt_scan(area)) {
21                         pr_err("invalid DTB %s\n", dtb);
22                         memblock_free(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 );
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