include/pc/bios.h

	bios.h revision 199767f8919635c4928607450d9e0abb932109ce
/*-
 * Copyright (c) 1997 Michael Smith
 * Copyright (c) 1998 Jonathan Lemon
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef _MACHINE_PC_BIOS_H_
#define _MACHINE_PC_BIOS_H_

/*
 * Int 15:E820 'SMAP' structure
 */
#define SMAP_SIG    0x534D4150          /* 'SMAP' */

#define SMAP_TYPE_MEMORY    1
#define SMAP_TYPE_RESERVED  2
#define SMAP_TYPE_ACPI_RECLAIM  3
#define SMAP_TYPE_ACPI_NVS  4
#define SMAP_TYPE_ACPI_ERROR    5

#define SMAP_XATTR_ENABLED  0x00000001
#define SMAP_XATTR_NON_VOLATILE 0x00000002
#define SMAP_XATTR_MASK     (SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE)

struct bios_smap {
    u_int64_t   base;
    u_int64_t   length;
    u_int32_t   type;
} __packed;

/* Structure extended to include extended attribute field in ACPI 3.0. */
struct bios_smap_xattr {
    u_int64_t   base;
    u_int64_t   length;
    u_int32_t   type;
    u_int32_t   xattr;
} __packed;

/*
 * System Management BIOS
 */
#define SMBIOS_START    0xf0000
#define SMBIOS_STEP 0x10
#define SMBIOS_OFF  0
#define SMBIOS_LEN  4
#define SMBIOS_SIG  "_SM_"

struct smbios_eps {
    uint8_t     anchor_string[4];       /* '_SM_' */
    uint8_t     checksum;
    uint8_t     length;
    uint8_t     major_version;
    uint8_t     minor_version;
    uint16_t    maximum_structure_size;
    uint8_t     entry_point_revision;
    uint8_t     formatted_area[5];
    uint8_t     intermediate_anchor_string[5];  /* '_DMI_' */
    uint8_t     intermediate_checksum;
    uint16_t    structure_table_length;
    uint32_t    structure_table_address;
    uint16_t    number_structures;
    uint8_t     BCD_revision;
};

struct smbios_structure_header {
    uint8_t     type;
    uint8_t     length;
    uint16_t    handle;
};

#ifdef _KERNEL
#define BIOS_PADDRTOVADDR(x)    ((x) + KERNBASE)
#define BIOS_VADDRTOPADDR(x)    ((x) - KERNBASE)

struct bios_oem_signature {
    char * anchor;      /* search anchor string in BIOS memory */
    size_t offset;      /* offset from anchor (may be negative) */
    size_t totlen;      /* total length of BIOS string to copy */
} __packed;

struct bios_oem_range {
    u_int from;     /* shouldn't be below 0xe0000 */
    u_int to;       /* shouldn't be above 0xfffff */
} __packed;

struct bios_oem {
    struct bios_oem_range range;
    struct bios_oem_signature signature[];
} __packed;

int bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen,
        int sigofs);
void bios_add_smap_entries(struct bios_smap *smapbase, u_int32_t smapsize,
        vm_paddr_t *physmap, int *physmap_idx);
#endif

#endif /* _MACHINE_PC_BIOS_H_ */