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 : \
19 : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high) \
20 : "memory"); \
21 }
22
23 #define __ctl_store(array, low, high) { \
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 }
32
__ctl_set_bit(unsigned int cr,unsigned int bit)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
__ctl_clear_bit(unsigned int cr,unsigned int bit)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 : 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