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author | Steffen Trumtrar <s.trumtrar@pengutronix.de> | 2017-07-10 12:33:52 +0200 |
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committer | Lucas Stach <l.stach@pengutronix.de> | 2017-07-11 15:45:20 +0200 |
commit | b00a9d7b5c8bcce3d08b663b467f0686dc2466d9 (patch) | |
tree | ddaae97f26a38b455248017dca8d5149534231a9 /common/efi/efi.c | |
parent | 18dd855d0d9a8ac224fa53e4f3ad16fdf685c7b8 (diff) | |
download | barebox-b00a9d7b5c8bcce3d08b663b467f0686dc2466d9.tar.gz barebox-b00a9d7b5c8bcce3d08b663b467f0686dc2466d9.tar.xz |
efi: efi: load state from devicetree
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'common/efi/efi.c')
-rw-r--r-- | common/efi/efi.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/common/efi/efi.c b/common/efi/efi.c index f924385958..3423c8acfe 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 +386,63 @@ static int efi_postcore_init(void) } postcore_initcall(efi_postcore_init); +static int efi_late_init(void) +{ + char *state_desc; + int ret; + + if (!IS_ENABLED(CONFIG_STATE)) + return 0; + + state_desc = xasprintf("/boot/EFI/barebox/state.dtb"); + + 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); |