Am Mittwoch, den 05.07.2017, 12:56 +0200 schrieb Steffen Trumtrar:
> Signed-off-by: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
> ---
> common/efi/efi.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 56 insertions(+)
>
> diff --git a/common/efi/efi.c b/common/efi/efi.c
> index f924385958e1..cc3051dedae9 100644
> --- a/common/efi/efi.c
> +++ b/common/efi/efi.c
> @@ -40,6 +40,8 @@
> #include <efi.h>
> #include <efi/efi.h>
> #include <efi/efi-device.h>
> +#include <libfile.h>
> +#include <state.h>
>
> efi_runtime_services_t *RT;
> efi_boot_services_t *BS;
> @@ -384,6 +386,60 @@ static int efi_postcore_init(void)
> }
> postcore_initcall(efi_postcore_init);
>
> +static int efi_late_init(void)
> +{
> + char *state_desc;
> + int ret;
> +
> + state_desc = xasprintf("/boot/EFI/barebox/state.dtb");
This might deserve a few sentences in the documentation, instead of
being buried in the code.
> + if (state_desc) {
> + void *fdt;
> + size_t size;
> + struct device_node *root = NULL;
> + struct device_node *np = NULL;
> + struct state *state;
> +
> + fdt = read_file(state_desc, &size);
> + if (!fdt) {
> + pr_err("unable to read %s: %s\n", state_desc,
> + strerror(errno));
> + return -errno;
> + }
> +
> + if (file_detect_type(fdt, size) != filetype_oftree) {
> + pr_err("%s is not an oftree file.\n", state_desc);
> + free(fdt);
> + return -EINVAL;
> + }
> +
> + root = of_unflatten_dtb(fdt);
> +
> + free(fdt);
> +
> + if (IS_ERR(root))
> + return PTR_ERR(root);
> +
> + of_set_root_node(root);
> +
> + np = of_find_node_by_alias(root, "state");
> +
> + state = state_new_from_node(np, NULL, 0, 0, false);
> + if (IS_ERR(state))
> + return PTR_ERR(state);
> +
> + ret = state_load(state);
> + if (ret)
> + pr_warn("Failed to load persistent state, continuing with defaults, %d\n",
> + ret);
> +
> + return 0;
> + }
> +
> + return 0;
> +}
> +late_initcall(efi_late_init);
> +
> static int do_efiexit(int argc, char *argv[])
> {
> return BS->exit(efi_parent_image, EFI_SUCCESS, 0, NULL);
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