FreeBSD/Linux Kernel Cross Reference
sys/sys/memrange.h

     /* $OpenBSD: memrange.h,v 1.10 2015/08/18 20:19:32 miod Exp $ */
     /*-
      * Copyright (c) 1999 Michael Smith <msmith@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.
     * 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.
     */
    /*
     * Memory range attribute operations, performed on /dev/mem
     */
    
    /* Memory range attributes */
    #define MDF_UNCACHEABLE         (1<<0)  /* region not cached */
    #define MDF_WRITECOMBINE        (1<<1)  /* region supports "write combine" action */
    #define MDF_WRITETHROUGH        (1<<2)  /* write-through cached */
    #define MDF_WRITEBACK           (1<<3)  /* write-back cached */
    #define MDF_WRITEPROTECT        (1<<4)  /* read-only region */
    #define MDF_UNKNOWN             (1<<5)  /* any state we don't understand */
    #define MDF_ATTRMASK            (0x00ffffff)
    
    #define MDF_FIXBASE             (1<<24) /* fixed base */
    #define MDF_FIXLEN              (1<<25) /* fixed length */
    #define MDF_FIRMWARE            (1<<26) /* set by firmware (XXX not useful?) */
    #define MDF_ACTIVE              (1<<27) /* currently active */
    #define MDF_BOGUS               (1<<28) /* we don't like it */
    #define MDF_FIXACTIVE           (1<<29) /* can't be turned off */
    #define MDF_FORCE               (1<<31) /* force risky changes */
    
    struct mem_range_desc {
            u_int64_t       mr_base;
            u_int64_t       mr_len;
            int             mr_flags;
            char            mr_owner[8];
    };
    
    struct mem_range_op {
            struct mem_range_desc   *mo_desc;
            int                     mo_arg[2];
    #define MEMRANGE_SET_UPDATE     0
    #define MEMRANGE_SET_REMOVE     1
            /* XXX want a flag that says "set and undo when I exit" */
    };
    
    #define MEMRANGE_GET    _IOWR('m', 50, struct mem_range_op)
    #define MEMRANGE_SET    _IOW('m', 51, struct mem_range_op)
    
    /* Offset indicating a write combining mapping is requested.  */
    #define MEMRANGE_WC_RANGE       0x4000000000000000ULL
    
    #ifdef _KERNEL
    
    struct mem_range_softc;
    struct mem_range_ops {
            void    (*init)(struct mem_range_softc *sc);
            int     (*set)(struct mem_range_softc *sc,
                        struct mem_range_desc *mrd, int *arg);
            void    (*initAP)(struct mem_range_softc *sc);
            void    (*reload)(struct mem_range_softc *sc);
    };
    
    struct mem_range_softc {
            struct mem_range_ops    *mr_op;
            int                     mr_cap;
            int                     mr_ndesc;
            struct mem_range_desc   *mr_desc;
    };
    
    extern struct mem_range_softc mem_range_softc;
    
    __BEGIN_DECLS
    extern void mem_range_attach(void);
    extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
    extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
    extern void mem_range_AP_init(void);
    extern void mem_range_reload(void);
    __END_DECLS
    #endif /* _KERNEL */
    

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