tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2006 Atmark Techno, Inc.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 */
8
9#ifndef _ASM_MICROBLAZE_IRQFLAGS_H
10#define _ASM_MICROBLAZE_IRQFLAGS_H
11
12#include <linux/irqflags.h>
13
14# if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
15
16# define local_irq_save(flags) \
17 do { \
18 asm volatile ("# local_irq_save \n\t" \
19 "msrclr %0, %1 \n\t" \
20 "nop \n\t" \
21 : "=r"(flags) \
22 : "i"(MSR_IE) \
23 : "memory"); \
24 } while (0)
25
26# define local_irq_disable() \
27 do { \
28 asm volatile ("# local_irq_disable \n\t" \
29 "msrclr r0, %0 \n\t" \
30 "nop \n\t" \
31 : \
32 : "i"(MSR_IE) \
33 : "memory"); \
34 } while (0)
35
36# define local_irq_enable() \
37 do { \
38 asm volatile ("# local_irq_enable \n\t" \
39 "msrset r0, %0 \n\t" \
40 "nop \n\t" \
41 : \
42 : "i"(MSR_IE) \
43 : "memory"); \
44 } while (0)
45
46# else /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR == 0 */
47
48# define local_irq_save(flags) \
49 do { \
50 register unsigned tmp; \
51 asm volatile ("# local_irq_save \n\t" \
52 "mfs %0, rmsr \n\t" \
53 "nop \n\t" \
54 "andi %1, %0, %2 \n\t" \
55 "mts rmsr, %1 \n\t" \
56 "nop \n\t" \
57 : "=r"(flags), "=r" (tmp) \
58 : "i"(~MSR_IE) \
59 : "memory"); \
60 } while (0)
61
62# define local_irq_disable() \
63 do { \
64 register unsigned tmp; \
65 asm volatile ("# local_irq_disable \n\t" \
66 "mfs %0, rmsr \n\t" \
67 "nop \n\t" \
68 "andi %0, %0, %1 \n\t" \
69 "mts rmsr, %0 \n\t" \
70 "nop \n\t" \
71 : "=r"(tmp) \
72 : "i"(~MSR_IE) \
73 : "memory"); \
74 } while (0)
75
76# define local_irq_enable() \
77 do { \
78 register unsigned tmp; \
79 asm volatile ("# local_irq_enable \n\t" \
80 "mfs %0, rmsr \n\t" \
81 "nop \n\t" \
82 "ori %0, %0, %1 \n\t" \
83 "mts rmsr, %0 \n\t" \
84 "nop \n\t" \
85 : "=r"(tmp) \
86 : "i"(MSR_IE) \
87 : "memory"); \
88 } while (0)
89
90# endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
91
92#define local_save_flags(flags) \
93 do { \
94 asm volatile ("# local_save_flags \n\t" \
95 "mfs %0, rmsr \n\t" \
96 "nop \n\t" \
97 : "=r"(flags) \
98 : \
99 : "memory"); \
100 } while (0)
101
102#define local_irq_restore(flags) \
103 do { \
104 asm volatile ("# local_irq_restore \n\t"\
105 "mts rmsr, %0 \n\t" \
106 "nop \n\t" \
107 : \
108 : "r"(flags) \
109 : "memory"); \
110 } while (0)
111
112static inline int irqs_disabled(void)
113{
114 unsigned long flags;
115
116 local_save_flags(flags);
117 return ((flags & MSR_IE) == 0);
118}
119
120#define raw_irqs_disabled irqs_disabled
121#define raw_irqs_disabled_flags(flags) ((flags) == 0)
122
123#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */