0df4696923
This is a primary boot loader that is intended to implement the gptboot partition selection algorithm just like we did for BIOS booting. While the preferred method for UEFI is to use the UEFI Boot Manager protocol, there are situations where that can't be done: some BIOS makers interfere with the protocol in unhelpful ways, there's a new standard for a zero variable write from the client OS, and finally for USB drives that might be mobile between systems with multiple partitions there needs to be a media stable way to select. Reviewed by: tsoome, bcran Differential Revision: https://reviews.freebsd.org/D20547
42 lines
1.7 KiB
C
42 lines
1.7 KiB
C
/*-
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* Copyright (c) 2019 Netflix, Inc
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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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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DRV_H_
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#define _DRV_H_
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struct dsk {
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int part;
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daddr_t start;
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void *devinfo; /* Really a dev_into_t *, but that's not in scope */
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};
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int drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk);
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int drvwrite(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk);
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uint64_t drvsize(struct dsk *dskp);
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#endif /* !_DRV_H_ */
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