FreeBSD/Linux Kernel Cross Reference
sys/dev/hyperv/vmbus/i386/hyperv_machdep.c

     /*-
      * Copyright (c) 2016 Microsoft Corp.
      * 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 unmodified, 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 ``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 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <dev/hyperv/vmbus/x86/hyperv_machdep.h>
    
    uint64_t
    hypercall_md(volatile void *hc_addr, uint64_t in_val,
        uint64_t in_paddr, uint64_t out_paddr)
    {
            uint32_t in_val_hi = in_val >> 32;
            uint32_t in_val_lo = in_val & 0xFFFFFFFF;
            uint32_t status_hi, status_lo;
            uint32_t in_paddr_hi = in_paddr >> 32;
            uint32_t in_paddr_lo = in_paddr & 0xFFFFFFFF;
            uint32_t out_paddr_hi = out_paddr >> 32;
            uint32_t out_paddr_lo = out_paddr & 0xFFFFFFFF;
    
            __asm__ __volatile__ ("call *%8" : "=d"(status_hi), "=a"(status_lo) :
                "d" (in_val_hi), "a" (in_val_lo),
                "b" (in_paddr_hi), "c" (in_paddr_lo),
                "D"(out_paddr_hi), "S"(out_paddr_lo),
                "m" (hc_addr));
            return (status_lo | ((uint64_t)status_hi << 32));
    }

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