FreeBSD/Linux Kernel Cross Reference
sys/dev/bhnd/nvram/bhnd_nvram_data_bcmvar.h

     /*-
      * Copyright (c) 2015-2016 Landon Fuller <landonf@FreeBSD.org>
      * 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,
     *    without modification.
     * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
     *    redistribution must be conditioned upon including a substantially
     *    similar Disclaimer requirement for further binary redistribution.
     *
     * NO WARRANTY
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
     * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
     * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
     *
     * $FreeBSD$
     */
    
    #ifndef _BHND_NVRAM_BHND_NVRAM_BCMVAR_H_
    #define _BHND_NVRAM_BHND_NVRAM_BCMVAR_H_
    
    #define BCM_NVRAM_ENCODE_OPT_VERSION    "bcm_version"
    
    /**
     * BCM NVRAM header value data.
     */
    union bhnd_nvram_bcm_hvar_value {
            uint16_t        u16;
            uint32_t        u32;
    };
    
    /**
     * Internal representation of BCM NVRAM values that mirror (and must be
     * vended as) NVRAM variables.
     */
    struct bhnd_nvram_bcm_hvar {
            const char      *name;  /**< variable name */
            bhnd_nvram_type  type;  /**< value type */
            size_t           nelem; /**< value element count */
            size_t           len;   /**< value length */
            const char      *envp;  /**< Pointer to the NVRAM variable mirroring
                                         this header value, or NULL. */
            bool             stale; /**< header value does not match
                                         mirrored NVRAM value */
    
            /** variable data */
            union bhnd_nvram_bcm_hvar_value value;
    };
    
    /** BCM NVRAM header */
    struct bhnd_nvram_bcmhdr {
            uint32_t magic;
            uint32_t size;
            uint32_t cfg0;          /**< crc:8, version:8, sdram_init:16 */
            uint32_t cfg1;          /**< sdram_config:16, sdram_refresh:16 */
            uint32_t sdram_ncdl;    /**< sdram_ncdl */
    } __packed;
    
    int     bhnd_nvram_bcm_getvar_direct_common(struct bhnd_nvram_io *io,
                const char *name, void *outp, size_t *olen, bhnd_nvram_type otype,
                bool have_header);
    
    #endif /* _BHND_NVRAM_BHND_NVRAM_BCMVAR_H_ */

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