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
|
/* Copyright 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* IT83xx chip-specific part of the IRQ handling.
*/
#include "common.h"
#include "irq_chip.h"
#include "registers.h"
#include "util.h"
#define IRQ_GROUP(n, cpu_ints...) \
{(uint32_t)&CONCAT2(IT83XX_INTC_ISR, n) - IT83XX_INTC_BASE, \
(uint32_t)&CONCAT2(IT83XX_INTC_IER, n) - IT83XX_INTC_BASE, \
##cpu_ints}
static const struct {
uint8_t isr_off;
uint8_t ier_off;
uint8_t cpu_int[8];
} irq_groups[] = {
IRQ_GROUP(0, {-1, 2, 5, 4, 6, 2, 2, 4}),
IRQ_GROUP(1, { 7, 6, 6, 5, 2, 2, 2, 8}),
IRQ_GROUP(2, { 6, 2, 8, 8, 8, 2, 12, 12}),
IRQ_GROUP(3, { 5, 4, 4, 4, 11, 11, 3, 2}),
IRQ_GROUP(4, {11, 11, 11, 11, 8, 9, 9, 9}),
IRQ_GROUP(5, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(6, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(7, {10, 10, 3, 12, 3, 3, 3, 3}),
IRQ_GROUP(8, { 4, 4, 4, 4, 4, 4, -1, 12}),
IRQ_GROUP(9, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(10, { 3, 6, 12, 12, 5, 2, 2, 2}),
IRQ_GROUP(11, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(12, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(13, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(14, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(15, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(16, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(17, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(18, { 2, 2, 2, 2, -1, 4, 4, 7}),
IRQ_GROUP(19, { 6, 6, 12, 3, 3, 3, 3, 3}),
IRQ_GROUP(20, {12, 12, 12, 12, 12, 12, 12, -1}),
#if defined(IT83XX_INTC_GROUP_21_22_SUPPORT)
IRQ_GROUP(21, { 2, 2, 2, 2, 2, 2, 2, 2}),
IRQ_GROUP(22, { 2, 2, -1, -1, -1, -1, -1, -1}),
#elif defined(CHIP_FAMILY_IT8XXX1) || defined(CHIP_FAMILY_IT8XXX2)
IRQ_GROUP(21, {-1, -1, 12, 12, 12, 12, 12, 12}),
IRQ_GROUP(22, { 2, 2, 2, 2, 2, 2, 2, 2}),
#else
IRQ_GROUP(21, {-1, -1, -1, -1, -1, -1, -1, -1}),
IRQ_GROUP(22, {-1, -1, -1, -1, -1, -1, -1, -1}),
#endif
IRQ_GROUP(23, { 2, 2, -1, -1, -1, -1, -1, 2}),
IRQ_GROUP(24, { 2, 2, 2, 2, 2, 2, -1, 2}),
IRQ_GROUP(25, { 2, 2, 2, 2, -1, -1, -1, -1}),
IRQ_GROUP(26, { 2, 2, 2, 2, 2, 2, 2, -1}),
IRQ_GROUP(27, { 2, 2, 2, 2, 2, 2, -1, -1}),
IRQ_GROUP(28, { 2, 2, 2, 2, 2, 2, -1, -1}),
};
#if defined(CHIP_FAMILY_IT8320) /* N8 core */
/* Number of CPU hardware interrupts (HW0 ~ HW15) */
int cpu_int_entry_number;
#endif
int chip_get_ec_int(void)
{
extern volatile int ec_int;
#if defined(CHIP_FAMILY_IT8320) /* N8 core */
int i;
for (i = 0; i < IT83XX_IRQ_COUNT; i++) {
ec_int = IT83XX_INTC_IVCT(cpu_int_entry_number);
/*
* WORKAROUND: when the interrupt vector register isn't
* latched in a load operation,
* we read it again to make sure the value we got
* is the correct value.
*/
if (ec_int == IT83XX_INTC_IVCT(cpu_int_entry_number))
break;
}
/* Determine interrupt number */
ec_int -= 16;
#else /* defined(CHIP_FAMILY_IT8XXX2) RISCV core */
/* wait until two equal interrupt values are read */
do {
ec_int = IT83XX_INTC_AIVCT;
} while (ec_int != IT83XX_INTC_AIVCT);
ec_int -= 0x10;
/* Unsupported EC INT number. */
if (chip_get_intc_group(ec_int) >= 16)
return -1;
#endif
return ec_int;
}
int chip_get_intc_group(int irq)
{
return irq_groups[irq / 8].cpu_int[irq % 8];
}
void chip_enable_irq(int irq)
{
int group = irq / 8;
int bit = irq % 8;
/* SOC's interrupts share CPU machine-mode external interrupt */
if (IS_ENABLED(CHIP_CORE_RISCV))
IT83XX_INTC_REG(irq_groups[group].ier_off) |= BIT(bit);
/* SOC's interrupts use CPU HW interrupt 2 ~ 15 */
if (IS_ENABLED(CHIP_CORE_NDS32))
IT83XX_INTC_REG(IT83XX_INTC_EXT_IER_OFF(group)) |= BIT(bit);
}
void chip_disable_irq(int irq)
{
int group = irq / 8;
int bit = irq % 8;
/* SOC's interrupts share CPU machine-mode external interrupt */
if (IS_ENABLED(CHIP_CORE_RISCV)) {
volatile uint8_t _ier __unused;
IT83XX_INTC_REG(irq_groups[group].ier_off) &= ~BIT(bit);
/*
* This load operation will guarantee the above modification of
* EC's register can be seen by any following instructions.
*/
_ier = IT83XX_INTC_REG(irq_groups[group].ier_off);
}
/* SOC's interrupts use CPU HW interrupt 2 ~ 15 */
if (IS_ENABLED(CHIP_CORE_NDS32)) {
volatile uint8_t _ext_ier __unused;
IT83XX_INTC_REG(IT83XX_INTC_EXT_IER_OFF(group)) &= ~BIT(bit);
/*
* This load operation will guarantee the above modification of
* EC's register can be seen by any following instructions.
*/
_ext_ier = IT83XX_INTC_REG(IT83XX_INTC_EXT_IER_OFF(group));
}
}
void chip_clear_pending_irq(int irq)
{
int group = irq / 8;
int bit = irq % 8;
/* always write 1 clear, no | */
IT83XX_INTC_REG(irq_groups[group].isr_off) = BIT(bit);
}
int chip_trigger_irq(int irq)
{
int group = irq / 8;
int bit = irq % 8;
return irq_groups[group].cpu_int[bit];
}
void chip_init_irqs(void)
{
int i;
/* Clear all IERx and EXT_IERx */
for (i = 0; i < ARRAY_SIZE(irq_groups); i++) {
IT83XX_INTC_REG(irq_groups[i].ier_off) = 0;
if (IS_ENABLED(CHIP_CORE_NDS32))
IT83XX_INTC_REG(IT83XX_INTC_EXT_IER_OFF(i)) = 0;
}
}
|
