189bb7f9bSVladimir Kondratyev /*- 289bb7f9bSVladimir Kondratyev * SPDX-License-Identifier: BSD-2-Clause 389bb7f9bSVladimir Kondratyev * 489bb7f9bSVladimir Kondratyev * Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org> 589bb7f9bSVladimir Kondratyev * 689bb7f9bSVladimir Kondratyev * Redistribution and use in source and binary forms, with or without 789bb7f9bSVladimir Kondratyev * modification, are permitted provided that the following conditions 889bb7f9bSVladimir Kondratyev * are met: 989bb7f9bSVladimir Kondratyev * 1089bb7f9bSVladimir Kondratyev * 1. Redistributions of source code must retain the above copyright 1189bb7f9bSVladimir Kondratyev * notice, this list of conditions and the following disclaimer. 1289bb7f9bSVladimir Kondratyev * 2. Redistributions in binary form must reproduce the above copyright 1389bb7f9bSVladimir Kondratyev * notice, this list of conditions and the following disclaimer in the 1489bb7f9bSVladimir Kondratyev * documentation and/or other materials provided with the distribution. 1589bb7f9bSVladimir Kondratyev * 1689bb7f9bSVladimir Kondratyev * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1789bb7f9bSVladimir Kondratyev * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1889bb7f9bSVladimir Kondratyev * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1989bb7f9bSVladimir Kondratyev * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2089bb7f9bSVladimir Kondratyev * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2189bb7f9bSVladimir Kondratyev * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2289bb7f9bSVladimir Kondratyev * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2389bb7f9bSVladimir Kondratyev * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2489bb7f9bSVladimir Kondratyev * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2589bb7f9bSVladimir Kondratyev * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2689bb7f9bSVladimir Kondratyev */ 2789bb7f9bSVladimir Kondratyev 28307f78f3SVladimir Kondratyev #ifndef _LINUXKPI_LINUX_EFI_H_ 29307f78f3SVladimir Kondratyev #define _LINUXKPI_LINUX_EFI_H_ 3089bb7f9bSVladimir Kondratyev 3189bb7f9bSVladimir Kondratyev #include <sys/param.h> 32*325ba120SBjoern A. Zeeb #include <sys/queue.h> 3389bb7f9bSVladimir Kondratyev #include <sys/linker.h> 3489bb7f9bSVladimir Kondratyev #include <sys/systm.h> 3589bb7f9bSVladimir Kondratyev 3689bb7f9bSVladimir Kondratyev #include <machine/md_var.h> 3789bb7f9bSVladimir Kondratyev #include <machine/metadata.h> 3889bb7f9bSVladimir Kondratyev 3989bb7f9bSVladimir Kondratyev #define EFI_BOOT 0 4089bb7f9bSVladimir Kondratyev 4189bb7f9bSVladimir Kondratyev static inline bool 4289bb7f9bSVladimir Kondratyev __efi_enabled(int feature) 4389bb7f9bSVladimir Kondratyev { 4489bb7f9bSVladimir Kondratyev #if defined(MODINFOMD_EFI_MAP) && !defined(__amd64__) 4589bb7f9bSVladimir Kondratyev caddr_t kmdp; 4689bb7f9bSVladimir Kondratyev #endif 4789bb7f9bSVladimir Kondratyev bool enabled = false; 4889bb7f9bSVladimir Kondratyev 4989bb7f9bSVladimir Kondratyev switch (feature) { 5089bb7f9bSVladimir Kondratyev case EFI_BOOT: 5189bb7f9bSVladimir Kondratyev #ifdef __amd64__ 5289bb7f9bSVladimir Kondratyev /* Use cached value on amd64 */ 5389bb7f9bSVladimir Kondratyev enabled = efi_boot; 5489bb7f9bSVladimir Kondratyev #elif defined(MODINFOMD_EFI_MAP) 5589bb7f9bSVladimir Kondratyev kmdp = preload_search_by_type("elf kernel"); 5689bb7f9bSVladimir Kondratyev if (kmdp == NULL) 5789bb7f9bSVladimir Kondratyev kmdp = preload_search_by_type("elf64 kernel"); 5889bb7f9bSVladimir Kondratyev enabled = preload_search_info(kmdp, 5989bb7f9bSVladimir Kondratyev MODINFO_METADATA | MODINFOMD_EFI_MAP) != NULL; 6089bb7f9bSVladimir Kondratyev #endif 6189bb7f9bSVladimir Kondratyev break; 6289bb7f9bSVladimir Kondratyev default: 6389bb7f9bSVladimir Kondratyev break; 6489bb7f9bSVladimir Kondratyev } 6589bb7f9bSVladimir Kondratyev 6689bb7f9bSVladimir Kondratyev return (enabled); 6789bb7f9bSVladimir Kondratyev } 6889bb7f9bSVladimir Kondratyev 6989bb7f9bSVladimir Kondratyev #define efi_enabled(x) ({ \ 7089bb7f9bSVladimir Kondratyev _Static_assert((x) == EFI_BOOT, "unsupported feature"); \ 7189bb7f9bSVladimir Kondratyev __efi_enabled(x); \ 7289bb7f9bSVladimir Kondratyev }) 7389bb7f9bSVladimir Kondratyev 74307f78f3SVladimir Kondratyev #endif /* _LINUXKPI_LINUX_EFI_H_ */ 75