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
10#include <linux/bug.h>
11
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(							\
17		"	lctlg	%1,%2,%0\n"				\
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(							\
26		"	stctg	%1,%2,%0\n"				\
27		: "=Q" (*(addrtype *)(&array))				\
28		: "i" (low), "i" (high));				\
29}
30
31static 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
40static 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
49void smp_ctl_set_bit(int cr, int bit);
50void smp_ctl_clear_bit(int cr, int bit);
51
52union ctlreg0 {
53	unsigned long val;
54	struct {
55		unsigned long	   : 32;
56		unsigned long	   : 3;
57		unsigned long lap  : 1; /* Low-address-protection control */
58		unsigned long	   : 4;
59		unsigned long edat : 1; /* Enhanced-DAT-enablement control */
60		unsigned long	   : 4;
61		unsigned long afp  : 1; /* AFP-register control */
62		unsigned long vx   : 1; /* Vector enablement control */
63		unsigned long	   : 17;
64	};
65};
66
67#ifdef CONFIG_SMP
68# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
69# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
70#else
71# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
72# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
73#endif
74
75#endif /* __ASM_CTL_REG_H */
76