efi: Locate all block devices in the app
When starting the app, locate all block devices and make them available
to U-Boot. This allows listing partitions and accessing files in
filesystems.
EFI also has the concept of 'disks', meaning boot media. For now, this
is not obviously useful in U-Boot, but add code to at least locate these.
This can be expanded later as needed.
We cannot use printf() in the early stub or app since it is not compiled
in
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/efi_api.h b/include/efi_api.h
index 80109f0..ec9fa89 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -2035,4 +2035,19 @@
const u16 *package_version_name);
};
+#define EFI_DISK_IO_PROTOCOL_GUID \
+ EFI_GUID(0xce345171, 0xba0b, 0x11d2, 0x8e, 0x4f, \
+ 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
+
+struct efi_disk {
+ u64 revision;
+ efi_status_t (EFIAPI *read_disk)(struct efi_disk *this, u32 media_id,
+ u64 offset, efi_uintn_t buffer_size,
+ void *buffer);
+
+ efi_status_t (EFIAPI *write_disk)(struct efi_disk *this, u32 media_id,
+ u64 offset, efi_uintn_t buffer_size,
+ void *buffer);
+};
+
#endif