ctl_reg.h

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/*
 * Copyright IBM Corp. 1999, 2009
 *
 * Author(s): Martin Schwidefsky <[email protected]>
 */

#ifndef __ASM_CTL_REG_H
#define __ASM_CTL_REG_H

#ifdef CONFIG_64BIT

#define __ctl_load(array, low, high) ({             \
    typedef struct { char _[sizeof(array)]; } addrtype; \
    asm volatile(                       \
        "   lctlg   %1,%2,%0\n"         \
        : : "Q" (*(addrtype *)(&array)),        \
            "i" (low), "i" (high));         \
    })

#define __ctl_store(array, low, high) ({            \
    typedef struct { char _[sizeof(array)]; } addrtype; \
    asm volatile(                       \
        "   stctg   %1,%2,%0\n"         \
        : "=Q" (*(addrtype *)(&array))          \
        : "i" (low), "i" (high));           \
    })

#else /* CONFIG_64BIT */

#define __ctl_load(array, low, high) ({             \
    typedef struct { char _[sizeof(array)]; } addrtype; \
    asm volatile(                       \
        "   lctl    %1,%2,%0\n"         \
        : : "Q" (*(addrtype *)(&array)),        \
            "i" (low), "i" (high));         \
})

#define __ctl_store(array, low, high) ({            \
    typedef struct { char _[sizeof(array)]; } addrtype; \
    asm volatile(                       \
        "   stctl   %1,%2,%0\n"         \
        : "=Q" (*(addrtype *)(&array))          \
        : "i" (low), "i" (high));           \
    })

#endif /* CONFIG_64BIT */

#define __ctl_set_bit(cr, bit) ({   \
    unsigned long __dummy;      \
    __ctl_store(__dummy, cr, cr);   \
    __dummy |= 1UL << (bit);    \
    __ctl_load(__dummy, cr, cr);    \
})

#define __ctl_clear_bit(cr, bit) ({ \
    unsigned long __dummy;      \
    __ctl_store(__dummy, cr, cr);   \
    __dummy &= ~(1UL << (bit)); \
    __ctl_load(__dummy, cr, cr);    \
})

#ifdef CONFIG_SMP

extern void smp_ctl_set_bit(int cr, int bit);
extern void smp_ctl_clear_bit(int cr, int bit);
#define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
#define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)

#else

#define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
#define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)

#endif /* CONFIG_SMP */

#endif /* __ASM_CTL_REG_H */