FreeBSD/Linux Kernel Cross Reference
sys/amd64/include/pc/bios.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * 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_TYPE_DISABLED      6
    #define SMAP_TYPE_PMEM          7
    #define SMAP_TYPE_PRAM          12
    
    #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;
    
    #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_ */

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