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authorLucas Stach <l.stach@pengutronix.de>2014-12-08 14:42:28 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2014-12-09 09:59:09 +0100
commitda94ff1e37315900037dee2171f43c342616206d (patch)
tree7f8d9d2aa837aec213faa60a7b4311c7f988e4ff
parent38c6f5d35177e3e469ae0abb994b7aea68b790e9 (diff)
downloadbarebox-da94ff1e37315900037dee2171f43c342616206d.tar.gz
efi: add function to determine type of device path
Thanks to the wonders of UEFI we have to walk down the device path all the way until we arrive at the device we got this path from... Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--common/efi-devicepath.c15
-rw-r--r--include/efi.h1
2 files changed, 16 insertions, 0 deletions
diff --git a/common/efi-devicepath.c b/common/efi-devicepath.c
index 2b1d916..a53c6d2 100644
--- a/common/efi-devicepath.c
+++ b/common/efi-devicepath.c
@@ -1368,3 +1368,18 @@ char *device_path_to_str(struct efi_device_path *dev_path)
return str.str;
}
+
+u8 device_path_to_type(struct efi_device_path *dev_path)
+{
+ struct efi_device_path *dev_path_next;
+
+ dev_path = unpack_device_path(dev_path);
+ dev_path_next = next_device_path_node(dev_path);
+
+ while (!is_device_path_end(dev_path_next)) {
+ dev_path = dev_path_next;
+ dev_path_next = next_device_path_node(dev_path);
+ }
+
+ return device_path_type(dev_path);
+}
diff --git a/include/efi.h b/include/efi.h
index 4ad9f69..de51e1a 100644
--- a/include/efi.h
+++ b/include/efi.h
@@ -615,6 +615,7 @@ static inline int efi_compare_guid(efi_guid_t *a, efi_guid_t *b)
}
char *device_path_to_str(struct efi_device_path *dev_path);
+u8 device_path_to_type(struct efi_device_path *dev_path);
const char *efi_guid_string(efi_guid_t *g);