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
|
/*
* Copyright (c) 2015 Intel corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* @brief Public interface for configuring interrupts
*/
#ifndef _IRQ_H_
#define _IRQ_H_
/* Pull in the arch-specific implementations */
#include <arch/cpu.h>
#ifndef _ASMLANGUAGE
#include <toolchain/gcc.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Configure a static interrupt.
*
* All arguments must be computable by the compiler at build time.
*
* @param irq_p IRQ line number
* @param priority_p Interrupt priority
* @param isr_p Interrupt service routine
* @param isr_param_p ISR parameter
* @param flags_p Arch-specific IRQ configuration flags
*
* @return The vector assigned to this interrupt
*/
#define IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p) \
_ARCH_IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p)
/**
* @brief Disable all interrupts on the CPU (inline)
*
* This routine disables interrupts. It can be called from either interrupt,
* task or fiber level. This routine returns an architecture-dependent
* lock-out key representing the "interrupt disable state" prior to the call;
* this key can be passed to irq_unlock() to re-enable interrupts.
*
* The lock-out key should only be used as the argument to the irq_unlock()
* API. It should never be used to manually re-enable interrupts or to inspect
* or manipulate the contents of the source register.
*
* This function can be called recursively: it will return a key to return the
* state of interrupt locking to the previous level.
*
* WARNINGS
* Invoking a kernel routine with interrupts locked may result in
* interrupts being re-enabled for an unspecified period of time. If the
* called routine blocks, interrupts will be re-enabled while another
* thread executes, or while the system is idle.
*
* The "interrupt disable state" is an attribute of a thread. Thus, if a
* fiber or task disables interrupts and subsequently invokes a kernel
* routine that causes the calling thread to block, the interrupt
* disable state will be restored when the thread is later rescheduled
* for execution.
*
* @return An architecture-dependent unsigned int lock-out key representing the
* "interrupt disable state" prior to the call.
*
*/
#define irq_lock() _arch_irq_lock()
/**
*
* @brief Enable all interrupts on the CPU (inline)
*
* This routine re-enables interrupts on the CPU. The @a key parameter
* is an architecture-dependent lock-out key that is returned by a previous
* invocation of irq_lock().
*
* This routine can be called from either interrupt, task or fiber level
*
* @param key architecture-dependent lock-out key
*
* @return N/A
*/
#define irq_unlock(key) _arch_irq_unlock(key)
/**
* @brief Enable a specific IRQ
*
* @param irq IRQ line
* @return N/A
*/
#define irq_enable(irq) _arch_irq_enable(irq)
/**
* @brief Disable a specific IRQ
*
* @param irq IRQ line
* @return N/A
*/
#define irq_disable(irq) _arch_irq_disable(irq)
/**
* @brief Return IRQ enable state
*
* @param irq IRQ line
* @return interrupt enable state, true or false
*/
#define irq_is_enabled(irq) _arch_irq_is_enabled(irq)
#ifdef __cplusplus
}
#endif
#endif /* ASMLANGUAGE */
#endif /* _IRQ_H_ */
|
