build changes

1 files changed, 33 insertions, 0 deletions

diff --git a/boot/efi/protocol.c b/boot/efi/protocol.c
new file mode 100644
index 0000000..6bf8123
--- /dev/null
+++ b/boot/efi/protocol.c
@@ -0,0 +1,33 @@
+#include <efi/error.h>
+
+#include "kjarna_efi.h"
+
+void *efi_get_protocol(EFI_HANDLE handle, EFI_GUID *guid)
+{
+	void *protocol;
+
+	efi_errno = gBS->OpenProtocol(
+			handle,
+			guid,
+			&protocol,
+			efi_context->handle,
+			nullptr,
+			EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+
+	if (EFI_ERROR(efi_errno))
+	{
+		return nullptr;
+	}
+
+	return protocol;
+}
+
+void efi_close_protocol(EFI_HANDLE handle, EFI_GUID *guid)
+{
+	efi_errno = gBS->CloseProtocol(
+			handle,
+			guid,
+			efi_context->handle,
+			nullptr);
+}
+