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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/um/kernel/dtb.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/um/kernel/dtb.c')
-rw-r--r-- | arch/um/kernel/dtb.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/um/kernel/dtb.c b/arch/um/kernel/dtb.c new file mode 100644 index 000000000..484141b06 --- /dev/null +++ b/arch/um/kernel/dtb.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/init.h> +#include <linux/of_fdt.h> +#include <linux/printk.h> +#include <linux/memblock.h> +#include <init.h> + +#include "um_arch.h" + +static char *dtb __initdata; + +void uml_dtb_init(void) +{ + long long size; + void *area; + + area = uml_load_file(dtb, &size); + if (!area) + return; + + if (!early_init_dt_scan(area)) { + pr_err("invalid DTB %s\n", dtb); + memblock_free(area, size); + return; + } + + early_init_fdt_scan_reserved_mem(); + unflatten_device_tree(); +} + +static int __init uml_dtb_setup(char *line, int *add) +{ + dtb = line; + return 0; +} + +__uml_setup("dtb=", uml_dtb_setup, +"dtb=<file>\n" +" Boot the kernel with the devicetree blob from the specified file.\n" +); |