arch/s390/include/asm/ctl_reg.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright IBM Corp. 1999, 2009
   4  *
   5  * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
   6  */
   7
   8 #ifndef __ASM_CTL_REG_H
   9 #define __ASM_CTL_REG_H
  10
  11 #include <linux/bug.h>
  12
  13 #define __ctl_load(array, low, high) do {                               \
  14         typedef struct { char _[sizeof(array)]; } addrtype;             \
  15                                                                         \
  16         BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
  17         asm volatile(                                                   \
  18                 "       lctlg   %1,%2,%0\n"                             \
  19                 :                                                       \
  20                 : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high)    \
  21                 : "memory");                                            \
  22 } while (0)
  23
  24 #define __ctl_store(array, low, high) do {                              \
  25         typedef struct { char _[sizeof(array)]; } addrtype;             \
  26                                                                         \
  27         BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
  28         asm volatile(                                                   \
  29                 "       stctg   %1,%2,%0\n"                             \
  30                 : "=Q" (*(addrtype *)(&array))                          \
  31                 : "i" (low), "i" (high));                               \
  32 } while (0)
  33
  34 static inline void __ctl_set_bit(unsigned int cr, unsigned int bit)
  35 {
  36         unsigned long reg;
  37
  38         __ctl_store(reg, cr, cr);
  39         reg |= 1UL << bit;
  40         __ctl_load(reg, cr, cr);
  41 }
  42
  43 static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
  44 {
  45         unsigned long reg;
  46
  47         __ctl_store(reg, cr, cr);
  48         reg &= ~(1UL << bit);
  49         __ctl_load(reg, cr, cr);
  50 }
  51
  52 void smp_ctl_set_bit(int cr, int bit);
  53 void smp_ctl_clear_bit(int cr, int bit);
  54
  55 union ctlreg0 {
  56         unsigned long val;
  57         struct {
  58                 unsigned long      : 32;
  59                 unsigned long      : 3;
  60                 unsigned long lap  : 1; /* Low-address-protection control */
  61                 unsigned long      : 4;
  62                 unsigned long edat : 1; /* Enhanced-DAT-enablement control */
  63                 unsigned long      : 2;
  64                 unsigned long iep  : 1; /* Instruction-Execution-Protection */
  65                 unsigned long      : 1;
  66                 unsigned long afp  : 1; /* AFP-register control */
  67                 unsigned long vx   : 1; /* Vector enablement control */
  68                 unsigned long      : 7;
  69                 unsigned long sssm : 1; /* Service signal subclass mask */
  70                 unsigned long      : 9;
  71         };
  72 };
  73
  74 #ifdef CONFIG_SMP
  75 # define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
  76 # define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
  77 #else
  78 # define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
  79 # define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
  80 #endif
  81
  82 #endif /* __ASM_CTL_REG_H */