[mirror_ubuntu-focal-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>

#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 */
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
f4815ac6	12	#ifdef CONFIG_64BIT
12325f09 HC	13	# define __CTL_LOAD "lctlg"
	14	# define __CTL_STORE "stctg"
	15	#else
	16	# define __CTL_LOAD "lctl"
	17	# define __CTL_STORE "stctl"
	18	#endif
	19
	20	#define __ctl_load(array, low, high) { \
	21	typedef struct { char _[sizeof(array)]; } addrtype; \
	22	\
	23	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
	24	asm volatile( \
	25	__CTL_LOAD " %1,%2,%0\n" \
	26	: : "Q" ((addrtype )(&array)), "i" (low), "i" (high));\
	27	}
	28
	29	#define __ctl_store(array, low, high) { \
	30	typedef struct { char _[sizeof(array)]; } addrtype; \
	31	\
	32	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
	33	asm volatile( \
	34	__CTL_STORE " %1,%2,%0\n" \
	35	: "=Q" ((addrtype )(&array)) \
	36	: "i" (low), "i" (high)); \
	37	}
	38
	39	static inline void __ctl_set_bit(unsigned int cr, unsigned int bit)
	40	{
	41	unsigned long reg;
	42
	43	__ctl_store(reg, cr, cr);
	44	reg \|= 1UL << bit;
	45	__ctl_load(reg, cr, cr);
	46	}
	47
	48	static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
	49	{
	50	unsigned long reg;
	51
	52	__ctl_store(reg, cr, cr);
	53	reg &= ~(1UL << bit);
	54	__ctl_load(reg, cr, cr);
	55	}
	56
	57	void smp_ctl_set_bit(int cr, int bit);
	58	void smp_ctl_clear_bit(int cr, int bit);
a0616cde DH	59
a0616cde DH	60	#ifdef CONFIG_SMP
12325f09 HC	61	# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
12325f09 HC	62	# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
a0616cde	63	#else
12325f09 HC	64	# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
	65	# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
	66	#endif
a0616cde DH	67
a0616cde DH	68	#endif /* __ASM_CTL_REG_H */