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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/*
* QEMU Sparc Sun4c interrupt controller emulation
*
* Based on slavio_intctl, copyright (c) 2003-2005 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "sun4m.h"
#include "console.h"
//#define DEBUG_IRQ_COUNT
//#define DEBUG_IRQ
#ifdef DEBUG_IRQ
#define DPRINTF(fmt, args...) \
do { printf("IRQ: " fmt , ##args); } while (0)
#else
#define DPRINTF(fmt, args...)
#endif
/*
* Registers of interrupt controller in sun4c.
*
*/
#define MAX_PILS 16
typedef struct Sun4c_INTCTLState {
#ifdef DEBUG_IRQ_COUNT
uint64_t irq_count;
#endif
qemu_irq *cpu_irqs;
const uint32_t *intbit_to_level;
uint32_t pil_out;
uint8_t reg;
uint8_t pending;
} Sun4c_INTCTLState;
#define INTCTL_MAXADDR 0
#define INTCTL_SIZE (INTCTL_MAXADDR + 1)
static void sun4c_check_interrupts(void *opaque);
static uint32_t sun4c_intctl_mem_readb(void *opaque, target_phys_addr_t addr)
{
Sun4c_INTCTLState *s = opaque;
uint32_t ret;
ret = s->reg;
DPRINTF("read reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
return ret;
}
static void sun4c_intctl_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
Sun4c_INTCTLState *s = opaque;
DPRINTF("write reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
val &= 0xbf;
s->reg = val;
sun4c_check_interrupts(s);
}
static CPUReadMemoryFunc *sun4c_intctl_mem_read[3] = {
sun4c_intctl_mem_readb,
sun4c_intctl_mem_readb,
sun4c_intctl_mem_readb,
};
static CPUWriteMemoryFunc *sun4c_intctl_mem_write[3] = {
sun4c_intctl_mem_writeb,
sun4c_intctl_mem_writeb,
sun4c_intctl_mem_writeb,
};
void sun4c_pic_info(void *opaque)
{
Sun4c_INTCTLState *s = opaque;
term_printf("master: pending 0x%2.2x, enabled 0x%2.2x\n", s->pending, s->reg);
}
void sun4c_irq_info(void *opaque)
{
#ifndef DEBUG_IRQ_COUNT
term_printf("irq statistic code not compiled.\n");
#else
Sun4c_INTCTLState *s = opaque;
int64_t count;
term_printf("IRQ statistics:\n");
count = s->irq_count[i];
if (count > 0)
term_printf("%2d: %" PRId64 "\n", i, count);
#endif
}
static const uint32_t intbit_to_level[] = { 0, 1, 4, 6, 8, 10, 0, 14, };
static void sun4c_check_interrupts(void *opaque)
{
Sun4c_INTCTLState *s = opaque;
uint32_t pil_pending;
unsigned int i;
DPRINTF("pending %x disabled %x\n", pending, s->intregm_disabled);
pil_pending = 0;
if (s->pending && !(s->reg & 0x80000000)) {
for (i = 0; i < 8; i++) {
if (s->pending & (1 << i))
pil_pending |= 1 << intbit_to_level[i];
}
}
for (i = 0; i < MAX_PILS; i++) {
if (pil_pending & (1 << i)) {
if (!(s->pil_out & (1 << i)))
qemu_irq_raise(s->cpu_irqs[i]);
} else {
if (s->pil_out & (1 << i))
qemu_irq_lower(s->cpu_irqs[i]);
}
}
s->pil_out = pil_pending;
}
/*
* "irq" here is the bit number in the system interrupt register
*/
static void sun4c_set_irq(void *opaque, int irq, int level)
{
Sun4c_INTCTLState *s = opaque;
uint32_t mask = 1 << irq;
uint32_t pil = intbit_to_level[irq];
DPRINTF("Set irq %d -> pil %d level %d\n", irq, pil,
level);
if (pil > 0) {
if (level) {
#ifdef DEBUG_IRQ_COUNT
s->irq_count[pil]++;
#endif
s->pending |= mask;
} else {
s->pending &= ~mask;
}
sun4c_check_interrupts(s);
}
}
static void sun4c_intctl_save(QEMUFile *f, void *opaque)
{
Sun4c_INTCTLState *s = opaque;
qemu_put_8s(f, &s->reg);
qemu_put_8s(f, &s->pending);
}
static int sun4c_intctl_load(QEMUFile *f, void *opaque, int version_id)
{
Sun4c_INTCTLState *s = opaque;
if (version_id != 1)
return -EINVAL;
qemu_get_8s(f, &s->reg);
qemu_get_8s(f, &s->pending);
sun4c_check_interrupts(s);
return 0;
}
static void sun4c_intctl_reset(void *opaque)
{
Sun4c_INTCTLState *s = opaque;
s->reg = 1;
s->pending = 0;
sun4c_check_interrupts(s);
}
void *sun4c_intctl_init(target_phys_addr_t addr, qemu_irq **irq,
qemu_irq *parent_irq)
{
int sun4c_intctl_io_memory;
Sun4c_INTCTLState *s;
s = qemu_mallocz(sizeof(Sun4c_INTCTLState));
if (!s)
return NULL;
sun4c_intctl_io_memory = cpu_register_io_memory(0, sun4c_intctl_mem_read,
sun4c_intctl_mem_write, s);
cpu_register_physical_memory(addr, INTCTL_SIZE, sun4c_intctl_io_memory);
s->cpu_irqs = parent_irq;
register_savevm("sun4c_intctl", addr, 1, sun4c_intctl_save,
sun4c_intctl_load, s);
qemu_register_reset(sun4c_intctl_reset, s);
*irq = qemu_allocate_irqs(sun4c_set_irq, s, 8);
sun4c_intctl_reset(s);
return s;
}
|
