efi_loader: show UEFI revision in helloworld
Output the UEFI revision number in helloworld.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/lib/efi_loader/helloworld.c b/lib/efi_loader/helloworld.c
index 1ec0179..6c539ba 100644
--- a/lib/efi_loader/helloworld.c
+++ b/lib/efi_loader/helloworld.c
@@ -46,9 +46,27 @@
struct efi_loaded_image *loaded_image;
efi_status_t ret;
efi_uintn_t i;
+ u16 rev[] = L"0.0.0";
con_out->output_string(con_out, L"Hello, world!\n");
+ /* Print the revision number */
+ rev[0] = (systable->hdr.revision >> 16) + '0';
+ rev[4] = systable->hdr.revision & 0xffff;
+ for (; rev[4] >= 10;) {
+ rev[4] -= 10;
+ ++rev[2];
+ }
+ /* Third digit is only to be shown if non-zero */
+ if (rev[4])
+ rev[4] += '0';
+ else
+ rev[3] = 0;
+
+ con_out->output_string(con_out, L"Running on UEFI ");
+ con_out->output_string(con_out, rev);
+ con_out->output_string(con_out, L"\n");
+
/* Get the loaded image protocol */
ret = boottime->handle_protocol(handle, &loaded_image_guid,
(void **)&loaded_image);