Output the UEFI revision number in helloworld.

Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- lib/efi_loader/helloworld.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)

diff --git a/lib/efi_loader/helloworld.c b/lib/efi_loader/helloworld.c index 1ec01792263..6c539ba2049 100644 --- a/lib/efi_loader/helloworld.c +++ b/lib/efi_loader/helloworld.c @@ -46,9 +46,27 @@ efi_status_t EFIAPI efi_main(efi_handle_t handle, 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);