1*89bb7f9bSVladimir Kondratyev /*- 2*89bb7f9bSVladimir Kondratyev * SPDX-License-Identifier: BSD-2-Clause 3*89bb7f9bSVladimir Kondratyev * 4*89bb7f9bSVladimir Kondratyev * Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org> 5*89bb7f9bSVladimir Kondratyev * 6*89bb7f9bSVladimir Kondratyev * Redistribution and use in source and binary forms, with or without 7*89bb7f9bSVladimir Kondratyev * modification, are permitted provided that the following conditions 8*89bb7f9bSVladimir Kondratyev * are met: 9*89bb7f9bSVladimir Kondratyev * 10*89bb7f9bSVladimir Kondratyev * 1. Redistributions of source code must retain the above copyright 11*89bb7f9bSVladimir Kondratyev * notice, this list of conditions and the following disclaimer. 12*89bb7f9bSVladimir Kondratyev * 2. Redistributions in binary form must reproduce the above copyright 13*89bb7f9bSVladimir Kondratyev * notice, this list of conditions and the following disclaimer in the 14*89bb7f9bSVladimir Kondratyev * documentation and/or other materials provided with the distribution. 15*89bb7f9bSVladimir Kondratyev * 16*89bb7f9bSVladimir Kondratyev * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17*89bb7f9bSVladimir Kondratyev * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18*89bb7f9bSVladimir Kondratyev * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19*89bb7f9bSVladimir Kondratyev * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20*89bb7f9bSVladimir Kondratyev * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21*89bb7f9bSVladimir Kondratyev * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22*89bb7f9bSVladimir Kondratyev * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23*89bb7f9bSVladimir Kondratyev * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24*89bb7f9bSVladimir Kondratyev * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25*89bb7f9bSVladimir Kondratyev * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26*89bb7f9bSVladimir Kondratyev */ 27*89bb7f9bSVladimir Kondratyev 28*89bb7f9bSVladimir Kondratyev #ifndef _LINUX_EFI_H_ 29*89bb7f9bSVladimir Kondratyev #define _LINUX_EFI_H_ 30*89bb7f9bSVladimir Kondratyev 31*89bb7f9bSVladimir Kondratyev #include <sys/param.h> 32*89bb7f9bSVladimir Kondratyev #include <sys/linker.h> 33*89bb7f9bSVladimir Kondratyev #include <sys/systm.h> 34*89bb7f9bSVladimir Kondratyev 35*89bb7f9bSVladimir Kondratyev #include <machine/md_var.h> 36*89bb7f9bSVladimir Kondratyev #include <machine/metadata.h> 37*89bb7f9bSVladimir Kondratyev 38*89bb7f9bSVladimir Kondratyev #define EFI_BOOT 0 39*89bb7f9bSVladimir Kondratyev 40*89bb7f9bSVladimir Kondratyev static inline bool 41*89bb7f9bSVladimir Kondratyev __efi_enabled(int feature) 42*89bb7f9bSVladimir Kondratyev { 43*89bb7f9bSVladimir Kondratyev #if defined(MODINFOMD_EFI_MAP) && !defined(__amd64__) 44*89bb7f9bSVladimir Kondratyev caddr_t kmdp; 45*89bb7f9bSVladimir Kondratyev #endif 46*89bb7f9bSVladimir Kondratyev bool enabled = false; 47*89bb7f9bSVladimir Kondratyev 48*89bb7f9bSVladimir Kondratyev switch (feature) { 49*89bb7f9bSVladimir Kondratyev case EFI_BOOT: 50*89bb7f9bSVladimir Kondratyev #ifdef __amd64__ 51*89bb7f9bSVladimir Kondratyev /* Use cached value on amd64 */ 52*89bb7f9bSVladimir Kondratyev enabled = efi_boot; 53*89bb7f9bSVladimir Kondratyev #elif defined(MODINFOMD_EFI_MAP) 54*89bb7f9bSVladimir Kondratyev kmdp = preload_search_by_type("elf kernel"); 55*89bb7f9bSVladimir Kondratyev if (kmdp == NULL) 56*89bb7f9bSVladimir Kondratyev kmdp = preload_search_by_type("elf64 kernel"); 57*89bb7f9bSVladimir Kondratyev enabled = preload_search_info(kmdp, 58*89bb7f9bSVladimir Kondratyev MODINFO_METADATA | MODINFOMD_EFI_MAP) != NULL; 59*89bb7f9bSVladimir Kondratyev #endif 60*89bb7f9bSVladimir Kondratyev break; 61*89bb7f9bSVladimir Kondratyev default: 62*89bb7f9bSVladimir Kondratyev break; 63*89bb7f9bSVladimir Kondratyev } 64*89bb7f9bSVladimir Kondratyev 65*89bb7f9bSVladimir Kondratyev return (enabled); 66*89bb7f9bSVladimir Kondratyev } 67*89bb7f9bSVladimir Kondratyev 68*89bb7f9bSVladimir Kondratyev #define efi_enabled(x) ({ \ 69*89bb7f9bSVladimir Kondratyev _Static_assert((x) == EFI_BOOT, "unsupported feature"); \ 70*89bb7f9bSVladimir Kondratyev __efi_enabled(x); \ 71*89bb7f9bSVladimir Kondratyev }) 72*89bb7f9bSVladimir Kondratyev 73*89bb7f9bSVladimir Kondratyev #endif /* _LINUX_EFI_H_ */ 74