target-s390x/ioinst.c

   1 /*
   2  * I/O instructions for S/390
   3  *
   4  * Copyright 2012 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include <sys/types.h>
  13
  14 #include "cpu.h"
  15 #include "ioinst.h"
  16
  17 int ioinst_disassemble_sch_ident(uint32_t value, int *m, int *cssid, int *ssid,
  18                                  int *schid)
  19 {
  20     if (!IOINST_SCHID_ONE(value)) {
  21         return -EINVAL;
  22     }
  23     if (!IOINST_SCHID_M(value)) {
  24         if (IOINST_SCHID_CSSID(value)) {
  25             return -EINVAL;
  26         }
  27         *cssid = 0;
  28         *m = 0;
  29     } else {
  30         *cssid = IOINST_SCHID_CSSID(value);
  31         *m = 1;
  32     }
  33     *ssid = IOINST_SCHID_SSID(value);
  34     *schid = IOINST_SCHID_NR(value);
  35     return 0;
  36 }