include/arch.h

   1 /*
   2  * (C) Copyright 2007-2011  Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
   3  *
   4  * This file is released under the GPLv2.  See the COPYING file for more
   5  * details.
   6  */
   7
   8 #ifndef __ARCH_H
   9 #define __ARCH_H
  10
  11 struct psw {
  12         u8 _zero0:1,
  13            r:1,                 /* PER Mask (R)                 */
  14            _zero1:3,
  15            t:1,                 /* DAT Mode (T)                 */
  16            io:1,                /* I/O Mask (IO)                */
  17            ex:1;                /* External Mask (EX)           */
  18
  19         u8 key:4,               /* Key                          */
  20            fmt:1,               /* 1 on 390, 0 on z             */
  21            m:1,                 /* Machine-Check Mask (M)       */
  22            w:1,                 /* Wait State (W)               */
  23            p:1;                 /* Problem State (P)            */
  24
  25         u8 as:2,                /* Address-Space Control (AS)   */
  26            cc:2,                /* Condition Code (CC)          */
  27            prog_mask:4;         /* Program Mask                 */
  28
  29         u8 _zero2:7,
  30            ea:1;                /* Extended Addressing (EA)     */
  31
  32         u32 ba:1,               /* Basic Addressing (BA)        */
  33             ptr31:31;
  34
  35         u64 ptr;
  36 };
  37
  38 #define set_cr(cr, val)                                         \
  39         do {                                                    \
  40                 u64 lval = (val);                               \
  41                 asm volatile(                                   \
  42                         "lctlg  %1,%1,%0\n"                     \
  43                 : /* output */                                  \
  44                 : /* input */                                   \
  45                   "m" (lval),                                   \
  46                   "i" (cr)                                      \
  47                 );                                              \
  48         } while(0)
  49
  50 #define get_cr(cr)                                              \
  51         ({                                                      \
  52                 u64 reg;                                        \
  53                                                                 \
  54                 asm volatile(                                   \
  55                         "stctg  %1,%1,%0\n"                     \
  56                 : /* output */                                  \
  57                   "=m" (reg)                                    \
  58                 : /* input */                                   \
  59                   "i" (cr)                                      \
  60                 );                                              \
  61                 reg;                                            \
  62          })
  63
  64 #endif