1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2024 Ahmad Khalifa <ahmadkhalifa570@gmail.com> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 30 #include <efi.h> 31 #include <efilib.h> 32 33 #include <machine/specialreg.h> 34 35 /* 36 * Check for long mode then call efi_main 37 */ 38 EFI_STATUS 39 setup(EFI_HANDLE IH, EFI_SYSTEM_TABLE *ST) { 40 u_int edx; 41 42 asm("cpuid" : "=d"(edx) : "a"(0x80000001) : "ebx", "ecx"); 43 if ((edx & AMDID_LM) == 0) { 44 ST->ConOut->OutputString(ST->ConOut, (CHAR16 *) 45 L"This CPU doesn't support long mode.\r\n" 46 L"Unable to proceed.\r\n"); 47 ST->BootServices->Exit(IH, EFI_UNSUPPORTED, 0, NULL); 48 } 49 50 return (efi_main(IH, ST)); 51 } 52