[mirror_ubuntu-zesty-kernel.git] / arch / s390 / include / asm / ctl_reg.h

/*
 * Copyright IBM Corp. 1999, 2009
 *
 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#ifndef __ASM_CTL_REG_H
#define __ASM_CTL_REG_H

#include <linux/bug.h>

#define __ctl_load(array, low, high) {					\
	typedef struct { char _[sizeof(array)]; } addrtype;		\
									\
	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
	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;		\
									\
	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
	asm volatile(							\
		"	stctg	%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 __ctl_set_vx(void);

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

union ctlreg0 {
	unsigned long val;
	struct {
		unsigned long	   : 32;
		unsigned long	   : 3;
		unsigned long lap  : 1; /* Low-address-protection control */
		unsigned long	   : 4;
		unsigned long edat : 1; /* Enhanced-DAT-enablement control */
		unsigned long	   : 4;
		unsigned long afp  : 1; /* AFP-register control */
		unsigned long vx   : 1; /* Vector enablement control */
		unsigned long	   : 17;
	};
};

#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 */
Commit	Line	Data
a0616cde DH	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
acf6a004 MH	10	#include <linux/bug.h>
acf6a004 MH	11
12325f09 HC	12	#define __ctl_load(array, low, high) { \
	13	typedef struct { char _[sizeof(array)]; } addrtype; \
	14	\
	15	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
	16	asm volatile( \
5a79859a	17	" lctlg %1,%2,%0\n" \
12325f09 HC	18	: : "Q" ((addrtype )(&array)), "i" (low), "i" (high));\
	19	}
	20
	21	#define __ctl_store(array, low, high) { \
	22	typedef struct { char _[sizeof(array)]; } addrtype; \
	23	\
	24	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
	25	asm volatile( \
5a79859a	26	" stctg %1,%2,%0\n" \
12325f09 HC	27	: "=Q" ((addrtype )(&array)) \
	28	: "i" (low), "i" (high)); \
	29	}
	30
	31	static inline void __ctl_set_bit(unsigned int cr, unsigned int bit)
	32	{
	33	unsigned long reg;
	34
	35	__ctl_store(reg, cr, cr);
	36	reg \|= 1UL << bit;
	37	__ctl_load(reg, cr, cr);
	38	}
	39
	40	static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
	41	{
	42	unsigned long reg;
	43
	44	__ctl_store(reg, cr, cr);
	45	reg &= ~(1UL << bit);
	46	__ctl_load(reg, cr, cr);
	47	}
	48
9977e886 HB	49	void __ctl_set_vx(void);
9977e886 HB	50
12325f09 HC	51	void smp_ctl_set_bit(int cr, int bit);
12325f09 HC	52	void smp_ctl_clear_bit(int cr, int bit);
a0616cde	53
5f4e87a2 HC	54	union ctlreg0 {
	55	unsigned long val;
	56	struct {
5f4e87a2	57	unsigned long : 32;
5f4e87a2 HC	58	unsigned long : 3;
	59	unsigned long lap : 1; /* Low-address-protection control */
	60	unsigned long : 4;
	61	unsigned long edat : 1; /* Enhanced-DAT-enablement control */
cad49cfc HC	62	unsigned long : 4;
	63	unsigned long afp : 1; /* AFP-register control */
	64	unsigned long vx : 1; /* Vector enablement control */
	65	unsigned long : 17;
5f4e87a2 HC	66	};
	67	};
	68
a0616cde	69	#ifdef CONFIG_SMP
12325f09 HC	70	# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
12325f09 HC	71	# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
a0616cde	72	#else
12325f09 HC	73	# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
	74	# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
	75	#endif
a0616cde DH	76
a0616cde DH	77	#endif /* __ASM_CTL_REG_H */