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efi_loader: show UEFI revision in helloworld

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Output the UEFI revision number in helloworld.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-02-05 18:24:26 +01:00 committed by Alexander Graf
parent 0aa2da788b
commit f7c342f413
1 changed files with 18 additions and 0 deletions
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18
lib/efi_loader/helloworld.c
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@ -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);