1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_IRQFLAGS_H
#define __ASM_ARC_IRQFLAGS_H
/* vineetg: March 2010 : local_irq_save( ) optimisation
* -Remove explicit mov of current status32 into reg, that is not needed
* -Use BIC insn instead of INVERTED + AND
* -Conditionally disable interrupts (if they are not enabled, don't disable)
*/
#ifdef __KERNEL__
#include <asm/arcregs.h>
#ifndef __ASSEMBLY__
/******************************************************************
* IRQ Control Macros
******************************************************************/
/*
* Save IRQ state and disable IRQs
*/
static inline long arch_local_irq_save(void)
{
unsigned long temp, flags;
__asm__ __volatile__(
" lr %1, [status32] \n"
" bic %0, %1, %2 \n"
" and.f 0, %1, %2 \n"
" flag.nz %0 \n"
: "=r"(temp), "=r"(flags)
: "n"((STATUS_E1_MASK | STATUS_E2_MASK))
: "memory", "cc");
return flags;
}
/*
* restore saved IRQ state
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(
" flag %0 \n"
:
: "r"(flags)
: "memory");
}
/*
* Unconditionally Enable IRQs
*/
extern void arch_local_irq_enable(void);
/*
* Unconditionally Disable IRQs
*/
static inline void arch_local_irq_disable(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
" and %0, %0, %1 \n"
" flag %0 \n"
: "=&r"(temp)
: "n"(~(STATUS_E1_MASK | STATUS_E2_MASK))
: "memory");
}
/*
* save IRQ state
*/
static inline long arch_local_save_flags(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
: "=&r"(temp)
:
: "memory");
return temp;
}
/*
* Query IRQ state
*/
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & (STATUS_E1_MASK
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
| STATUS_E2_MASK
#endif
));
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
static inline void arch_mask_irq(unsigned int irq)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb &= ~(1 << irq);
write_aux_reg(AUX_IENABLE, ienb);
}
static inline void arch_unmask_irq(unsigned int irq)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb |= (1 << irq);
write_aux_reg(AUX_IENABLE, ienb);
}
#else
.macro IRQ_DISABLE scratch
lr \scratch, [status32]
bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
.endm
.macro IRQ_DISABLE_SAVE scratch, save
lr \scratch, [status32]
mov \save, \scratch /* Make a copy */
bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
.endm
.macro IRQ_ENABLE scratch
lr \scratch, [status32]
or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
.endm
#endif /* __ASSEMBLY__ */
#endif /* KERNEL */
#endif
|
