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

#ifndef __ASM_CTL_REG_H
#define __ASM_CTL_REG_H

#include <linux/bug.h>

#ifdef CONFIG_64BIT
# define __CTL_LOAD "lctlg"
# define __CTL_STORE "stctg"
#else
# define __CTL_LOAD "lctl"
# define __CTL_STORE "stctl"
#endif

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

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

static inline void __ctl_set_bit(unsigned int cr, unsigned int bit)
{
unsigned long reg;

__ctl_store(reg, cr, cr);
reg |= 1UL << bit;
__ctl_load(reg, cr, cr);
}

static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
{
unsigned long reg;

__ctl_store(reg, cr, cr);
reg &= ~(1UL << bit);
__ctl_load(reg, cr, cr);
}

void smp_ctl_set_bit(int cr, int bit);
void smp_ctl_clear_bit(int cr, int bit);

#ifdef CONFIG_SMP
# 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

#endif /* __ASM_CTL_REG_H */