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CommitLineData
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1/*
2 * Arm PrimeCell PL061 General Purpose IO with additional
3 * Luminary Micro Stellaris bits.
4 *
5 * Copyright (c) 2007 CodeSourcery.
6 * Written by Paul Brook
7 *
8e31bf38 8 * This code is licensed under the GPL.
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9 */
10
83c9f4ca 11#include "hw/sysbus.h"
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12
13//#define DEBUG_PL061 1
14
15#ifdef DEBUG_PL061
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16#define DPRINTF(fmt, ...) \
17do { printf("pl061: " fmt , ## __VA_ARGS__); } while (0)
18#define BADF(fmt, ...) \
19do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
9ee6e8bb 20#else
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21#define DPRINTF(fmt, ...) do {} while(0)
22#define BADF(fmt, ...) \
23do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__);} while (0)
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24#endif
25
26static const uint8_t pl061_id[12] =
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27 { 0x00, 0x00, 0x00, 0x00, 0x61, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
28static const uint8_t pl061_id_luminary[12] =
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29 { 0x00, 0x00, 0x00, 0x00, 0x61, 0x00, 0x18, 0x01, 0x0d, 0xf0, 0x05, 0xb1 };
30
31typedef struct {
40905a6a 32 SysBusDevice busdev;
3cf89f8a 33 MemoryRegion iomem;
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34 uint32_t locked;
35 uint32_t data;
36 uint32_t old_data;
37 uint32_t dir;
38 uint32_t isense;
39 uint32_t ibe;
40 uint32_t iev;
41 uint32_t im;
42 uint32_t istate;
43 uint32_t afsel;
44 uint32_t dr2r;
45 uint32_t dr4r;
46 uint32_t dr8r;
47 uint32_t odr;
48 uint32_t pur;
49 uint32_t pdr;
50 uint32_t slr;
51 uint32_t den;
52 uint32_t cr;
53 uint32_t float_high;
b3aaff11 54 uint32_t amsel;
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55 qemu_irq irq;
56 qemu_irq out[8];
7063f49f 57 const unsigned char *id;
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58} pl061_state;
59
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60static const VMStateDescription vmstate_pl061 = {
61 .name = "pl061",
b3aaff11 62 .version_id = 2,
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63 .minimum_version_id = 1,
64 .fields = (VMStateField[]) {
65 VMSTATE_UINT32(locked, pl061_state),
66 VMSTATE_UINT32(data, pl061_state),
67 VMSTATE_UINT32(old_data, pl061_state),
68 VMSTATE_UINT32(dir, pl061_state),
69 VMSTATE_UINT32(isense, pl061_state),
70 VMSTATE_UINT32(ibe, pl061_state),
71 VMSTATE_UINT32(iev, pl061_state),
72 VMSTATE_UINT32(im, pl061_state),
73 VMSTATE_UINT32(istate, pl061_state),
74 VMSTATE_UINT32(afsel, pl061_state),
75 VMSTATE_UINT32(dr2r, pl061_state),
76 VMSTATE_UINT32(dr4r, pl061_state),
77 VMSTATE_UINT32(dr8r, pl061_state),
78 VMSTATE_UINT32(odr, pl061_state),
79 VMSTATE_UINT32(pur, pl061_state),
80 VMSTATE_UINT32(pdr, pl061_state),
81 VMSTATE_UINT32(slr, pl061_state),
82 VMSTATE_UINT32(den, pl061_state),
83 VMSTATE_UINT32(cr, pl061_state),
84 VMSTATE_UINT32(float_high, pl061_state),
b3aaff11 85 VMSTATE_UINT32_V(amsel, pl061_state, 2),
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86 VMSTATE_END_OF_LIST()
87 }
88};
89
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90static void pl061_update(pl061_state *s)
91{
92 uint8_t changed;
93 uint8_t mask;
775616c3 94 uint8_t out;
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95 int i;
96
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97 /* Outputs float high. */
98 /* FIXME: This is board dependent. */
99 out = (s->data & s->dir) | ~s->dir;
100 changed = s->old_data ^ out;
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101 if (!changed)
102 return;
103
775616c3 104 s->old_data = out;
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105 for (i = 0; i < 8; i++) {
106 mask = 1 << i;
b78c2b3a 107 if (changed & mask) {
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108 DPRINTF("Set output %d = %d\n", i, (out & mask) != 0);
109 qemu_set_irq(s->out[i], (out & mask) != 0);
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110 }
111 }
112
113 /* FIXME: Implement input interrupts. */
114}
115
a8170e5e 116static uint64_t pl061_read(void *opaque, hwaddr offset,
3cf89f8a 117 unsigned size)
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118{
119 pl061_state *s = (pl061_state *)opaque;
120
9ee6e8bb 121 if (offset >= 0xfd0 && offset < 0x1000) {
7063f49f 122 return s->id[(offset - 0xfd0) >> 2];
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123 }
124 if (offset < 0x400) {
125 return s->data & (offset >> 2);
126 }
127 switch (offset) {
128 case 0x400: /* Direction */
129 return s->dir;
130 case 0x404: /* Interrupt sense */
131 return s->isense;
132 case 0x408: /* Interrupt both edges */
133 return s->ibe;
ff2712ba 134 case 0x40c: /* Interrupt event */
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135 return s->iev;
136 case 0x410: /* Interrupt mask */
137 return s->im;
138 case 0x414: /* Raw interrupt status */
139 return s->istate;
140 case 0x418: /* Masked interrupt status */
141 return s->istate | s->im;
142 case 0x420: /* Alternate function select */
143 return s->afsel;
144 case 0x500: /* 2mA drive */
145 return s->dr2r;
146 case 0x504: /* 4mA drive */
147 return s->dr4r;
148 case 0x508: /* 8mA drive */
149 return s->dr8r;
150 case 0x50c: /* Open drain */
151 return s->odr;
152 case 0x510: /* Pull-up */
153 return s->pur;
154 case 0x514: /* Pull-down */
155 return s->pdr;
156 case 0x518: /* Slew rate control */
157 return s->slr;
158 case 0x51c: /* Digital enable */
159 return s->den;
160 case 0x520: /* Lock */
161 return s->locked;
162 case 0x524: /* Commit */
163 return s->cr;
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164 case 0x528: /* Analog mode select */
165 return s->amsel;
9ee6e8bb 166 default:
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167 qemu_log_mask(LOG_GUEST_ERROR,
168 "pl061_read: Bad offset %x\n", (int)offset);
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169 return 0;
170 }
171}
172
a8170e5e 173static void pl061_write(void *opaque, hwaddr offset,
3cf89f8a 174 uint64_t value, unsigned size)
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175{
176 pl061_state *s = (pl061_state *)opaque;
177 uint8_t mask;
178
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179 if (offset < 0x400) {
180 mask = (offset >> 2) & s->dir;
181 s->data = (s->data & ~mask) | (value & mask);
182 pl061_update(s);
183 return;
184 }
185 switch (offset) {
186 case 0x400: /* Direction */
a35faa94 187 s->dir = value & 0xff;
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188 break;
189 case 0x404: /* Interrupt sense */
a35faa94 190 s->isense = value & 0xff;
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191 break;
192 case 0x408: /* Interrupt both edges */
a35faa94 193 s->ibe = value & 0xff;
9ee6e8bb 194 break;
ff2712ba 195 case 0x40c: /* Interrupt event */
a35faa94 196 s->iev = value & 0xff;
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197 break;
198 case 0x410: /* Interrupt mask */
a35faa94 199 s->im = value & 0xff;
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200 break;
201 case 0x41c: /* Interrupt clear */
202 s->istate &= ~value;
203 break;
204 case 0x420: /* Alternate function select */
205 mask = s->cr;
206 s->afsel = (s->afsel & ~mask) | (value & mask);
207 break;
208 case 0x500: /* 2mA drive */
a35faa94 209 s->dr2r = value & 0xff;
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210 break;
211 case 0x504: /* 4mA drive */
a35faa94 212 s->dr4r = value & 0xff;
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213 break;
214 case 0x508: /* 8mA drive */
a35faa94 215 s->dr8r = value & 0xff;
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216 break;
217 case 0x50c: /* Open drain */
a35faa94 218 s->odr = value & 0xff;
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219 break;
220 case 0x510: /* Pull-up */
a35faa94 221 s->pur = value & 0xff;
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222 break;
223 case 0x514: /* Pull-down */
a35faa94 224 s->pdr = value & 0xff;
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225 break;
226 case 0x518: /* Slew rate control */
a35faa94 227 s->slr = value & 0xff;
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228 break;
229 case 0x51c: /* Digital enable */
a35faa94 230 s->den = value & 0xff;
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231 break;
232 case 0x520: /* Lock */
233 s->locked = (value != 0xacce551);
234 break;
235 case 0x524: /* Commit */
236 if (!s->locked)
a35faa94 237 s->cr = value & 0xff;
9ee6e8bb 238 break;
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239 case 0x528:
240 s->amsel = value & 0xff;
241 break;
9ee6e8bb 242 default:
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243 qemu_log_mask(LOG_GUEST_ERROR,
244 "pl061_write: Bad offset %x\n", (int)offset);
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245 }
246 pl061_update(s);
247}
248
249static void pl061_reset(pl061_state *s)
250{
251 s->locked = 1;
252 s->cr = 0xff;
253}
254
9596ebb7 255static void pl061_set_irq(void * opaque, int irq, int level)
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256{
257 pl061_state *s = (pl061_state *)opaque;
258 uint8_t mask;
259
260 mask = 1 << irq;
261 if ((s->dir & mask) == 0) {
262 s->data &= ~mask;
263 if (level)
264 s->data |= mask;
265 pl061_update(s);
266 }
267}
268
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269static const MemoryRegionOps pl061_ops = {
270 .read = pl061_read,
271 .write = pl061_write,
272 .endianness = DEVICE_NATIVE_ENDIAN,
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273};
274
7063f49f 275static int pl061_init(SysBusDevice *dev, const unsigned char *id)
9ee6e8bb 276{
40905a6a 277 pl061_state *s = FROM_SYSBUS(pl061_state, dev);
7063f49f 278 s->id = id;
3cf89f8a 279 memory_region_init_io(&s->iomem, &pl061_ops, s, "pl061", 0x1000);
750ecd44 280 sysbus_init_mmio(dev, &s->iomem);
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281 sysbus_init_irq(dev, &s->irq);
282 qdev_init_gpio_in(&dev->qdev, pl061_set_irq, 8);
283 qdev_init_gpio_out(&dev->qdev, s->out, 8);
9ee6e8bb 284 pl061_reset(s);
81a322d4 285 return 0;
9ee6e8bb 286}
40905a6a 287
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288static int pl061_init_luminary(SysBusDevice *dev)
289{
290 return pl061_init(dev, pl061_id_luminary);
291}
292
293static int pl061_init_arm(SysBusDevice *dev)
294{
295 return pl061_init(dev, pl061_id);
296}
297
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298static void pl061_class_init(ObjectClass *klass, void *data)
299{
39bffca2 300 DeviceClass *dc = DEVICE_CLASS(klass);
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301 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
302
303 k->init = pl061_init_arm;
39bffca2 304 dc->vmsd = &vmstate_pl061;
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305}
306
8c43a6f0 307static const TypeInfo pl061_info = {
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308 .name = "pl061",
309 .parent = TYPE_SYS_BUS_DEVICE,
310 .instance_size = sizeof(pl061_state),
311 .class_init = pl061_class_init,
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312};
313
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314static void pl061_luminary_class_init(ObjectClass *klass, void *data)
315{
39bffca2 316 DeviceClass *dc = DEVICE_CLASS(klass);
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317 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
318
319 k->init = pl061_init_luminary;
39bffca2 320 dc->vmsd = &vmstate_pl061;
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321}
322
8c43a6f0 323static const TypeInfo pl061_luminary_info = {
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324 .name = "pl061_luminary",
325 .parent = TYPE_SYS_BUS_DEVICE,
326 .instance_size = sizeof(pl061_state),
327 .class_init = pl061_luminary_class_init,
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328};
329
83f7d43a 330static void pl061_register_types(void)
40905a6a 331{
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332 type_register_static(&pl061_info);
333 type_register_static(&pl061_luminary_info);
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334}
335
83f7d43a 336type_init(pl061_register_types)