cebe9dc98a
- Do not iterate int 15h, function e820h twice. Instead, we use STAILQ to store each return buffer and copy all at once. - Export optional extended attributes defined in ACPI 3.0 as separate metadata. Currently, there are only two bits defined in the specification. For example, if the descriptor has extended attributes and it is not enabled, it has to be ignored by OS. We may implement it in the kernel later if it is necessary and proven correct in reality. - Check return buffer size strictly as suggested in ACPI 3.0. Reviewed by: jhb
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/*-
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* Copyright (c) 1997 Michael Smith
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* Copyright (c) 1998 Jonathan Lemon
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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 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 _MACHINE_PC_BIOS_H_
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#define _MACHINE_PC_BIOS_H_
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extern u_int32_t bios_sigsearch(u_int32_t start, u_char *sig, int siglen,
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int paralen, int sigofs);
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#define BIOS_PADDRTOVADDR(x) ((x) + KERNBASE)
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#define BIOS_VADDRTOPADDR(x) ((x) - KERNBASE)
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/*
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* Int 15:E820 'SMAP' structure
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*/
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#define SMAP_SIG 0x534D4150 /* 'SMAP' */
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#define SMAP_TYPE_MEMORY 1
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#define SMAP_TYPE_RESERVED 2
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#define SMAP_TYPE_ACPI_RECLAIM 3
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#define SMAP_TYPE_ACPI_NVS 4
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#define SMAP_TYPE_ACPI_ERROR 5
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#define SMAP_XATTR_ENABLED 0x00000001
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#define SMAP_XATTR_NON_VOLATILE 0x00000002
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#define SMAP_XATTR_MASK (SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE)
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struct bios_smap {
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u_int64_t base;
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u_int64_t length;
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u_int32_t type;
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} __packed;
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struct bios_oem_signature {
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char * anchor; /* search anchor string in BIOS memory */
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size_t offset; /* offset from anchor (may be negative) */
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size_t totlen; /* total length of BIOS string to copy */
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} __packed;
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struct bios_oem_range {
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u_int from; /* shouldn't be below 0xe0000 */
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u_int to; /* shouldn't be above 0xfffff */
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} __packed;
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struct bios_oem {
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struct bios_oem_range range;
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struct bios_oem_signature signature[];
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} __packed;
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extern int
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bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
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#endif /* _MACHINE_PC_BIOS_H_ */
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