summaryrefslogtreecommitdiff
path: root/arch/s390/include/asm/ctl_reg.h
blob: e508dff92535ff8e2e5b87cd996d393c271b8bd0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
/*
 * 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) do {				\
	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)	\
		: "memory");						\
} while (0)

#define __ctl_store(array, low, high) do {				\
	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));				\
} while (0)

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);

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	   : 2;
		unsigned long iep  : 1; /* Instruction-Execution-Protection */
		unsigned long	   : 1;
		unsigned long afp  : 1; /* AFP-register control */
		unsigned long vx   : 1; /* Vector enablement control */
		unsigned long	   : 7;
		unsigned long sssm : 1; /* Service signal subclass mask */
		unsigned long	   : 9;
	};
};

#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 */