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
hypercall_md(volatile void * hc_addr,uint64_t in_val,uint64_t in_paddr,uint64_t out_paddr)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