tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
fork
Configure Feed
Select the types of activity you want to include in your feed.
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#ifdef CONFIG_64BIT
13# define __CTL_LOAD "lctlg"
14# define __CTL_STORE "stctg"
15#else
16# define __CTL_LOAD "lctl"
17# define __CTL_STORE "stctl"
18#endif
19
20#define __ctl_load(array, low, high) { \
21 typedef struct { char _[sizeof(array)]; } addrtype; \
22 \
23 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
24 asm volatile( \
25 __CTL_LOAD " %1,%2,%0\n" \
26 : : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high));\
27}
28
29#define __ctl_store(array, low, high) { \
30 typedef struct { char _[sizeof(array)]; } addrtype; \
31 \
32 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
33 asm volatile( \
34 __CTL_STORE " %1,%2,%0\n" \
35 : "=Q" (*(addrtype *)(&array)) \
36 : "i" (low), "i" (high)); \
37}
38
39static inline void __ctl_set_bit(unsigned int cr, unsigned int bit)
40{
41 unsigned long reg;
42
43 __ctl_store(reg, cr, cr);
44 reg |= 1UL << bit;
45 __ctl_load(reg, cr, cr);
46}
47
48static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
49{
50 unsigned long reg;
51
52 __ctl_store(reg, cr, cr);
53 reg &= ~(1UL << bit);
54 __ctl_load(reg, cr, cr);
55}
56
57void smp_ctl_set_bit(int cr, int bit);
58void smp_ctl_clear_bit(int cr, int bit);
59
60union ctlreg0 {
61 unsigned long val;
62 struct {
63#ifdef CONFIG_64BIT
64 unsigned long : 32;
65#endif
66 unsigned long : 3;
67 unsigned long lap : 1; /* Low-address-protection control */
68 unsigned long : 4;
69 unsigned long edat : 1; /* Enhanced-DAT-enablement control */
70 unsigned long : 23;
71 };
72};
73
74#ifdef CONFIG_SMP
75# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
76# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
77#else
78# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
79# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
80#endif
81
82#endif /* __ASM_CTL_REG_H */