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review.evervolv.com / android_kernel_oneplus_msm8996 / 83a44ac8bf4a8e6cbbf0c00ff281a482778f708a / . / arch / arc / include / asm / irqflags.h
blob: ccd84806b62fe9635472e6bbc00e0dc5643683ff [file] [log] [blame]
Vineet Guptaac4c2442013-01-18 15:12:16 +0530[diff] [blame]1/*
2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#ifndef __ASM_ARC_IRQFLAGS_H
10#define __ASM_ARC_IRQFLAGS_H
11
12/* vineetg: March 2010 : local_irq_save( ) optimisation
13 * -Remove explicit mov of current status32 into reg, that is not needed
14 * -Use BIC insn instead of INVERTED + AND
15 * -Conditionally disable interrupts (if they are not enabled, don't disable)
16*/
17
18#ifdef __KERNEL__
19
20#include <asm/arcregs.h>
21
22#ifndef __ASSEMBLY__
23
24/******************************************************************
25 * IRQ Control Macros
26 ******************************************************************/
27
28/*
29 * Save IRQ state and disable IRQs
30 */
31static inline long arch_local_irq_save(void)
32{
33 unsigned long temp, flags;
34
35 __asm__ __volatile__(
36 " lr %1, [status32] \n"
37 " bic %0, %1, %2 \n"
38 " and.f 0, %1, %2 \n"
39 " flag.nz %0 \n"
40 : "=r"(temp), "=r"(flags)
41 : "n"((STATUS_E1_MASK | STATUS_E2_MASK))
42 : "cc");
43
44 return flags;
45}
46
47/*
48 * restore saved IRQ state
49 */
50static inline void arch_local_irq_restore(unsigned long flags)
51{
52
53 __asm__ __volatile__(
54 " flag %0 \n"
55 :
56 : "r"(flags));
57}
58
59/*
60 * Unconditionally Enable IRQs
61 */
62extern void arch_local_irq_enable(void);
63
64/*
65 * Unconditionally Disable IRQs
66 */
67static inline void arch_local_irq_disable(void)
68{
69 unsigned long temp;
70
71 __asm__ __volatile__(
72 " lr %0, [status32] \n"
73 " and %0, %0, %1 \n"
74 " flag %0 \n"
75 : "=&r"(temp)
76 : "n"(~(STATUS_E1_MASK | STATUS_E2_MASK)));
77}
78
79/*
80 * save IRQ state
81 */
82static inline long arch_local_save_flags(void)
83{
84 unsigned long temp;
85
86 __asm__ __volatile__(
87 " lr %0, [status32] \n"
88 : "=&r"(temp));
89
90 return temp;
91}
92
93/*
94 * Query IRQ state
95 */
96static inline int arch_irqs_disabled_flags(unsigned long flags)
97{
Vineet Gupta4788a592013-01-18 15:12:22 +0530[diff] [blame]98 return !(flags & (STATUS_E1_MASK
99#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
100 | STATUS_E2_MASK
101#endif
102 ));
Vineet Guptaac4c2442013-01-18 15:12:16 +0530[diff] [blame]103}
104
105static inline int arch_irqs_disabled(void)
106{
107 return arch_irqs_disabled_flags(arch_local_save_flags());
108}
109
110static inline void arch_mask_irq(unsigned int irq)
111{
112 unsigned int ienb;
113
114 ienb = read_aux_reg(AUX_IENABLE);
115 ienb &= ~(1 << irq);
116 write_aux_reg(AUX_IENABLE, ienb);
117}
118
119static inline void arch_unmask_irq(unsigned int irq)
120{
121 unsigned int ienb;
122
123 ienb = read_aux_reg(AUX_IENABLE);
124 ienb |= (1 << irq);
125 write_aux_reg(AUX_IENABLE, ienb);
126}
127
128#else
129
130.macro IRQ_DISABLE scratch
131 lr \scratch, [status32]
132 bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
133 flag \scratch
134.endm
135
136.macro IRQ_DISABLE_SAVE scratch, save
137 lr \scratch, [status32]
138 mov \save, \scratch /* Make a copy */
139 bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
140 flag \scratch
141.endm
142
143.macro IRQ_ENABLE scratch
144 lr \scratch, [status32]
145 or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
146 flag \scratch
147.endm
148
149#endif /* __ASSEMBLY__ */
150
151#endif /* KERNEL */
152
153#endif