xref: /openbmc/linux/arch/s390/include/asm/ctl_reg.h (revision a2cce7a9)
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 
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 
49 void __ctl_set_vx(void);
50 
51 void smp_ctl_set_bit(int cr, int bit);
52 void smp_ctl_clear_bit(int cr, int bit);
53 
54 union ctlreg0 {
55 	unsigned long val;
56 	struct {
57 		unsigned long	   : 32;
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 */
62 		unsigned long	   : 4;
63 		unsigned long afp  : 1; /* AFP-register control */
64 		unsigned long vx   : 1; /* Vector enablement control */
65 		unsigned long	   : 17;
66 	};
67 };
68 
69 #ifdef CONFIG_SMP
70 # define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
71 # define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
72 #else
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
76 
77 #endif /* __ASM_CTL_REG_H */
78