bb30b08e76
To allow more general use of the bootrom region, separate initialization from allocation, and allocation from loading a file. The bootrom segment is the high 16MB of the low 4GB region. Each allocation in the segment creates a new mapping with specified protection. By default, allocation begins at the low end of the range. However, the BOOTROM_ALLOC_TOP flag is provided to locate a provided bootrom in the high region it is expected to be in. The existing ROM-file loading code is refactored to use the new interface. Reviewed by: grehan (earlier version) Differential Revision: https://reviews.freebsd.org/D24422
51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2015 Neel Natu <neel@freebsd.org>
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* All rights reserved.
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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 ``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 _BOOTROM_H_
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#define _BOOTROM_H_
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <limits.h>
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struct vmctx;
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void init_bootrom(struct vmctx *ctx);
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enum {
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BOOTROM_ALLOC_TOP = 0x80,
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_FORCE_INT = INT_MIN,
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};
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int bootrom_alloc(struct vmctx *ctx, size_t len, int prot, int flags,
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char **region_out, uint64_t *gpa_out);
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int bootrom_loadrom(struct vmctx *ctx, const char *romfile);
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#endif
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