xref: /openbmc/linux/arch/s390/include/asm/ctl_reg.h (revision 4da722ca)
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) do {				\
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 		:							\
19 		: "Q" (*(addrtype *)(&array)), "i" (low), "i" (high)	\
20 		: "memory");						\
21 } while (0)
22 
23 #define __ctl_store(array, low, high) do {				\
24 	typedef struct { char _[sizeof(array)]; } addrtype;		\
25 									\
26 	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
27 	asm volatile(							\
28 		"	stctg	%1,%2,%0\n"				\
29 		: "=Q" (*(addrtype *)(&array))				\
30 		: "i" (low), "i" (high));				\
31 } while (0)
32 
33 static inline void __ctl_set_bit(unsigned int cr, unsigned int bit)
34 {
35 	unsigned long reg;
36 
37 	__ctl_store(reg, cr, cr);
38 	reg |= 1UL << bit;
39 	__ctl_load(reg, cr, cr);
40 }
41 
42 static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
43 {
44 	unsigned long reg;
45 
46 	__ctl_store(reg, cr, cr);
47 	reg &= ~(1UL << bit);
48 	__ctl_load(reg, cr, cr);
49 }
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	   : 2;
63 		unsigned long iep  : 1; /* Instruction-Execution-Protection */
64 		unsigned long	   : 1;
65 		unsigned long afp  : 1; /* AFP-register control */
66 		unsigned long vx   : 1; /* Vector enablement control */
67 		unsigned long	   : 7;
68 		unsigned long sssm : 1; /* Service signal subclass mask */
69 		unsigned long	   : 9;
70 	};
71 };
72 
73 #ifdef CONFIG_SMP
74 # define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
75 # define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
76 #else
77 # define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
78 # define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
79 #endif
80 
81 #endif /* __ASM_CTL_REG_H */
82