1 /*- 2 * Copyright (c) 2016 Microsoft Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <dev/hyperv/vmbus/x86/hyperv_machdep.h> 29 30 uint64_t 31 hypercall_md(volatile void *hc_addr, uint64_t in_val, 32 uint64_t in_paddr, uint64_t out_paddr) 33 { 34 uint32_t in_val_hi = in_val >> 32; 35 uint32_t in_val_lo = in_val & 0xFFFFFFFF; 36 uint32_t status_hi, status_lo; 37 uint32_t in_paddr_hi = in_paddr >> 32; 38 uint32_t in_paddr_lo = in_paddr & 0xFFFFFFFF; 39 uint32_t out_paddr_hi = out_paddr >> 32; 40 uint32_t out_paddr_lo = out_paddr & 0xFFFFFFFF; 41 42 __asm__ __volatile__ ("call *%8" : "=d"(status_hi), "=a"(status_lo) : 43 "d" (in_val_hi), "a" (in_val_lo), 44 "b" (in_paddr_hi), "c" (in_paddr_lo), 45 "D"(out_paddr_hi), "S"(out_paddr_lo), 46 "m" (hc_addr)); 47 return (status_lo | ((uint64_t)status_hi << 32)); 48 } 49