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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 : 23;
61 };
62};
63
64#ifdef CONFIG_SMP
65# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
66# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
67#else
68# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
69# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
70#endif
71
72#endif /* __ASM_CTL_REG_H */