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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/****************************************************************************
* z16f/z16f_irq.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <nuttx/irq.h>
#include "chip/chip.h"
#include "os_internal.h"
#include "up_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_irqinitialize
****************************************************************************/
void up_irqinitialize(void)
{
/* Clear and disable all interrupts. Set all to priority 0. */
putreg8(0xff, Z16F_IRQ0);
putreg8(0xff, Z16F_IRQ1);
putreg8(0xff, Z16F_IRQ2);
putreg16(0x0000, Z16F_IRQ0_EN);
putreg16(0x0000, Z16F_IRQ1_EN);
putreg16(0x0000, Z16F_IRQ2_EN);
/* currents_regs is non-NULL only while processing an interrupt */
current_regs = NULL;
/* And finally, enable interrupts */
#ifndef CONFIG_SUPPRESS_INTERRUPTS
EI();
#endif
}
/****************************************************************************
* Name: up_disable_irq
*
* Description:
* Disable the IRQ specified by 'irq'
*
****************************************************************************/
void up_disable_irq(int irq)
{
/* System exceptions cannot be disabled */
if (irq >= Z16F_IRQ_IRQ0)
{
/* Disable the interrupt by clearing the corresponding bit in the
* appropriate IRQ enable register.
*/
if (irq < Z16F_IRQ_IRQ1)
{
putreg8((getreg8(Z16F_IRQ0_ENH) & ~Z16_IRQ0_BIT(irq)), Z16F_IRQ0_ENH);
}
else if (irq < Z16F_IRQ_IRQ2)
{
putreg8((getreg8(Z16F_IRQ1_ENH) & ~Z16_IRQ1_BIT(irq)), Z16F_IRQ1_ENH);
}
else if (irq < NR_IRQS)
{
putreg8((getreg8(Z16F_IRQ2_ENH) & ~Z16_IRQ2_BIT(irq)), Z16F_IRQ2_ENH);
}
}
}
/****************************************************************************
* Name: up_enable_irq
*
* Description:
* Enable the IRQ specified by 'irq'
*
****************************************************************************/
void up_enable_irq(int irq)
{
/* System exceptions cannot be disabled */
if (irq >= Z16F_IRQ_IRQ0)
{
/* Enable the interrupt by setting the corresponding bit in the
* appropriate IRQ enable register.
*/
if (irq < Z16F_IRQ_IRQ1)
{
putreg8((getreg8(Z16F_IRQ0_ENH) | Z16_IRQ0_BIT(irq)), Z16F_IRQ0_ENH);
}
else if (irq < Z16F_IRQ_IRQ2)
{
putreg8((getreg8(Z16F_IRQ1_ENH) | Z16_IRQ1_BIT(irq)), Z16F_IRQ1_ENH);
}
else if (irq < NR_IRQS)
{
putreg8((getreg8(Z16F_IRQ2_ENH) | Z16_IRQ2_BIT(irq)), Z16F_IRQ2_ENH);
}
}
}
/****************************************************************************
* Name: up_maskack_irq
*
* Description:
* Mask the IRQ and acknowledge it
*
****************************************************************************/
void up_maskack_irq(int irq)
{
/* System exceptions cannot be disabled or acknowledged */
if (irq >= Z16F_IRQ_IRQ0)
{
/* Disable the interrupt by clearing the corresponding bit in the
* appropriate IRQ enable register and acknowledge it by setting the
* corresponding bit in the IRQ status register.
*/
if (irq < Z16F_IRQ_IRQ1)
{
putreg8((getreg8(Z16F_IRQ0_ENH) & ~Z16_IRQ0_BIT(irq)), Z16F_IRQ0_ENH);
putreg8(Z16_IRQ0_BIT(irq), Z16F_IRQ0);
}
else if (irq < Z16F_IRQ_IRQ2)
{
putreg8((getreg8(Z16F_IRQ1_ENH) & ~Z16_IRQ1_BIT(irq)), Z16F_IRQ1_ENH);
putreg8(Z16_IRQ1_BIT(irq), Z16F_IRQ2);
}
else if (irq < NR_IRQS)
{
putreg8((getreg8(Z16F_IRQ2_ENH) & ~Z16_IRQ2_BIT(irq)), Z16F_IRQ2_ENH);
putreg8(Z16_IRQ2_BIT(irq), Z16F_IRQ2);
}
}
}
|