arch/s390/include/asm/ctl_reg.h

   1 /*
   2  * Copyright IBM Corp. 1999, 2009
   3  *
   4  * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
   5  */
   6
   7 #ifndef __ASM_CTL_REG_H
   8 #define __ASM_CTL_REG_H
   9
  10 #ifdef CONFIG_64BIT
  11
  12 #define __ctl_load(array, low, high) ({                         \
  13         typedef struct { char _[sizeof(array)]; } addrtype;     \
  14         asm volatile(                                           \
  15                 "       lctlg   %1,%2,%0\n"                     \
  16                 : : "Q" (*(addrtype *)(&array)),                \
  17                     "i" (low), "i" (high));                     \
  18         })
  19
  20 #define __ctl_store(array, low, high) ({                        \
  21         typedef struct { char _[sizeof(array)]; } addrtype;     \
  22         asm volatile(                                           \
  23                 "       stctg   %1,%2,%0\n"                     \
  24                 : "=Q" (*(addrtype *)(&array))                  \
  25                 : "i" (low), "i" (high));                       \
  26         })
  27
  28 #else /* CONFIG_64BIT */
  29
  30 #define __ctl_load(array, low, high) ({                         \
  31         typedef struct { char _[sizeof(array)]; } addrtype;     \
  32         asm volatile(                                           \
  33                 "       lctl    %1,%2,%0\n"                     \
  34                 : : "Q" (*(addrtype *)(&array)),                \
  35                     "i" (low), "i" (high));                     \
  36 })
  37
  38 #define __ctl_store(array, low, high) ({                        \
  39         typedef struct { char _[sizeof(array)]; } addrtype;     \
  40         asm volatile(                                           \
  41                 "       stctl   %1,%2,%0\n"                     \
  42                 : "=Q" (*(addrtype *)(&array))                  \
  43                 : "i" (low), "i" (high));                       \
  44         })
  45
  46 #endif /* CONFIG_64BIT */
  47
  48 #define __ctl_set_bit(cr, bit) ({       \
  49         unsigned long __dummy;          \
  50         __ctl_store(__dummy, cr, cr);   \
  51         __dummy |= 1UL << (bit);        \
  52         __ctl_load(__dummy, cr, cr);    \
  53 })
  54
  55 #define __ctl_clear_bit(cr, bit) ({     \
  56         unsigned long __dummy;          \
  57         __ctl_store(__dummy, cr, cr);   \
  58         __dummy &= ~(1UL << (bit));     \
  59         __ctl_load(__dummy, cr, cr);    \
  60 })
  61
  62 #ifdef CONFIG_SMP
  63
  64 extern void smp_ctl_set_bit(int cr, int bit);
  65 extern void smp_ctl_clear_bit(int cr, int bit);
  66 #define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
  67 #define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
  68
  69 #else
  70
  71 #define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
  72 #define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
  73
  74 #endif /* CONFIG_SMP */
  75
  76 #endif /* __ASM_CTL_REG_H */