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325ba12055
sys/linker.h needs sys/queue.h; this gets another wireless driver closer to compiling on main. MFC after: 3 days
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUXKPI_LINUX_EFI_H_
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#define _LINUXKPI_LINUX_EFI_H_
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/linker.h>
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#include <sys/systm.h>
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#include <machine/md_var.h>
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#include <machine/metadata.h>
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#define EFI_BOOT 0
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static inline bool
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__efi_enabled(int feature)
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{
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#if defined(MODINFOMD_EFI_MAP) && !defined(__amd64__)
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caddr_t kmdp;
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#endif
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bool enabled = false;
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switch (feature) {
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case EFI_BOOT:
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#ifdef __amd64__
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/* Use cached value on amd64 */
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enabled = efi_boot;
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#elif defined(MODINFOMD_EFI_MAP)
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kmdp = preload_search_by_type("elf kernel");
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if (kmdp == NULL)
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kmdp = preload_search_by_type("elf64 kernel");
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enabled = preload_search_info(kmdp,
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MODINFO_METADATA | MODINFOMD_EFI_MAP) != NULL;
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#endif
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break;
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default:
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break;
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}
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return (enabled);
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}
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#define efi_enabled(x) ({ \
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_Static_assert((x) == EFI_BOOT, "unsupported feature"); \
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__efi_enabled(x); \
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})
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#endif /* _LINUXKPI_LINUX_EFI_H_ */
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