tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
33static 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
42static 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
51void smp_ctl_set_bit(int cr, int bit);
52void smp_ctl_clear_bit(int cr, int bit);
53
54union 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 : 7;
66 unsigned long sssm : 1; /* Service signal subclass mask */
67 unsigned long : 9;
68 };
69};
70
71#ifdef CONFIG_SMP
72# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
73# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
74#else
75# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
76# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
77#endif
78
79#endif /* __ASM_CTL_REG_H */