2 * Arm PrimeCell PL080/PL081 DMA controller
4 * Copyright (c) 2006 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licensed under the GPL.
10 #include "qemu/osdep.h"
11 #include "hw/sysbus.h"
12 #include "exec/address-spaces.h"
14 #include "hw/dma/pl080.h"
15 #include "qapi/error.h"
17 #define PL080_CONF_E 0x1
18 #define PL080_CONF_M1 0x2
19 #define PL080_CONF_M2 0x4
21 #define PL080_CCONF_H 0x40000
22 #define PL080_CCONF_A 0x20000
23 #define PL080_CCONF_L 0x10000
24 #define PL080_CCONF_ITC 0x08000
25 #define PL080_CCONF_IE 0x04000
26 #define PL080_CCONF_E 0x00001
28 #define PL080_CCTRL_I 0x80000000
29 #define PL080_CCTRL_DI 0x08000000
30 #define PL080_CCTRL_SI 0x04000000
31 #define PL080_CCTRL_D 0x02000000
32 #define PL080_CCTRL_S 0x01000000
34 static const VMStateDescription vmstate_pl080_channel = {
35 .name = "pl080_channel",
37 .minimum_version_id = 1,
38 .fields = (VMStateField[]) {
39 VMSTATE_UINT32(src, pl080_channel),
40 VMSTATE_UINT32(dest, pl080_channel),
41 VMSTATE_UINT32(lli, pl080_channel),
42 VMSTATE_UINT32(ctrl, pl080_channel),
43 VMSTATE_UINT32(conf, pl080_channel),
48 static const VMStateDescription vmstate_pl080 = {
51 .minimum_version_id = 1,
52 .fields = (VMStateField[]) {
53 VMSTATE_UINT8(tc_int, PL080State),
54 VMSTATE_UINT8(tc_mask, PL080State),
55 VMSTATE_UINT8(err_int, PL080State),
56 VMSTATE_UINT8(err_mask, PL080State),
57 VMSTATE_UINT32(conf, PL080State),
58 VMSTATE_UINT32(sync, PL080State),
59 VMSTATE_UINT32(req_single, PL080State),
60 VMSTATE_UINT32(req_burst, PL080State),
61 VMSTATE_UINT8(tc_int, PL080State),
62 VMSTATE_UINT8(tc_int, PL080State),
63 VMSTATE_UINT8(tc_int, PL080State),
64 VMSTATE_STRUCT_ARRAY(chan, PL080State, PL080_MAX_CHANNELS,
65 1, vmstate_pl080_channel, pl080_channel),
66 VMSTATE_INT32(running, PL080State),
71 static const unsigned char pl080_id[] =
72 { 0x80, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
74 static const unsigned char pl081_id[] =
75 { 0x81, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
77 static void pl080_update(PL080State *s)
79 bool tclevel = (s->tc_int & s->tc_mask);
80 bool errlevel = (s->err_int & s->err_mask);
82 qemu_set_irq(s->interr, errlevel);
83 qemu_set_irq(s->inttc, tclevel);
84 qemu_set_irq(s->irq, errlevel || tclevel);
87 static void pl080_run(PL080State *s)
103 for (c = 0; c < s->nchannels; c++) {
104 if (s->chan[c].conf & PL080_CCONF_ITC)
105 s->tc_mask |= 1 << c;
106 if (s->chan[c].conf & PL080_CCONF_IE)
107 s->err_mask |= 1 << c;
110 if ((s->conf & PL080_CONF_E) == 0)
113 /* If we are already in the middle of a DMA operation then indicate that
114 there may be new DMA requests and return immediately. */
121 for (c = 0; c < s->nchannels; c++) {
124 /* Test if thiws channel has any pending DMA requests. */
125 if ((ch->conf & (PL080_CCONF_H | PL080_CCONF_E))
128 flow = (ch->conf >> 11) & 7;
131 "pl080_run: Peripheral flow control not implemented\n");
133 src_id = (ch->conf >> 1) & 0x1f;
134 dest_id = (ch->conf >> 6) & 0x1f;
135 size = ch->ctrl & 0xfff;
136 req = s->req_single | s->req_burst;
141 if ((req & (1u << dest_id)) == 0)
145 if ((req & (1u << src_id)) == 0)
149 if ((req & (1u << src_id)) == 0
150 || (req & (1u << dest_id)) == 0)
157 /* Transfer one element. */
158 /* ??? Should transfer multiple elements for a burst request. */
159 /* ??? Unclear what the proper behavior is when source and
160 destination widths are different. */
161 swidth = 1 << ((ch->ctrl >> 18) & 7);
162 dwidth = 1 << ((ch->ctrl >> 21) & 7);
163 for (n = 0; n < dwidth; n+= swidth) {
164 address_space_read(&s->downstream_as, ch->src,
165 MEMTXATTRS_UNSPECIFIED, buff + n, swidth);
166 if (ch->ctrl & PL080_CCTRL_SI)
169 xsize = (dwidth < swidth) ? swidth : dwidth;
170 /* ??? This may pad the value incorrectly for dwidth < 32. */
171 for (n = 0; n < xsize; n += dwidth) {
172 address_space_write(&s->downstream_as, ch->dest + n,
173 MEMTXATTRS_UNSPECIFIED, buff + n, dwidth);
174 if (ch->ctrl & PL080_CCTRL_DI)
179 ch->ctrl = (ch->ctrl & 0xfffff000) | size;
181 /* Transfer complete. */
183 ch->src = address_space_ldl_le(&s->downstream_as,
185 MEMTXATTRS_UNSPECIFIED,
187 ch->dest = address_space_ldl_le(&s->downstream_as,
189 MEMTXATTRS_UNSPECIFIED,
191 ch->ctrl = address_space_ldl_le(&s->downstream_as,
193 MEMTXATTRS_UNSPECIFIED,
195 ch->lli = address_space_ldl_le(&s->downstream_as,
197 MEMTXATTRS_UNSPECIFIED,
200 ch->conf &= ~PL080_CCONF_E;
202 if (ch->ctrl & PL080_CCTRL_I) {
213 static uint64_t pl080_read(void *opaque, hwaddr offset,
216 PL080State *s = (PL080State *)opaque;
220 if (offset >= 0xfe0 && offset < 0x1000) {
221 if (s->nchannels == 8) {
222 return pl080_id[(offset - 0xfe0) >> 2];
224 return pl081_id[(offset - 0xfe0) >> 2];
227 if (offset >= 0x100 && offset < 0x200) {
228 i = (offset & 0xe0) >> 5;
229 if (i >= s->nchannels)
231 switch ((offset >> 2) & 7) {
232 case 0: /* SrcAddr */
233 return s->chan[i].src;
234 case 1: /* DestAddr */
235 return s->chan[i].dest;
237 return s->chan[i].lli;
238 case 3: /* Control */
239 return s->chan[i].ctrl;
240 case 4: /* Configuration */
241 return s->chan[i].conf;
246 switch (offset >> 2) {
247 case 0: /* IntStatus */
248 return (s->tc_int & s->tc_mask) | (s->err_int & s->err_mask);
249 case 1: /* IntTCStatus */
250 return (s->tc_int & s->tc_mask);
251 case 3: /* IntErrorStatus */
252 return (s->err_int & s->err_mask);
253 case 5: /* RawIntTCStatus */
255 case 6: /* RawIntErrorStatus */
257 case 7: /* EnbldChns */
259 for (i = 0; i < s->nchannels; i++) {
260 if (s->chan[i].conf & PL080_CCONF_E)
264 case 8: /* SoftBReq */
265 case 9: /* SoftSReq */
266 case 10: /* SoftLBReq */
267 case 11: /* SoftLSReq */
268 /* ??? Implement these. */
270 case 12: /* Configuration */
276 qemu_log_mask(LOG_GUEST_ERROR,
277 "pl080_read: Bad offset %x\n", (int)offset);
282 static void pl080_write(void *opaque, hwaddr offset,
283 uint64_t value, unsigned size)
285 PL080State *s = (PL080State *)opaque;
288 if (offset >= 0x100 && offset < 0x200) {
289 i = (offset & 0xe0) >> 5;
290 if (i >= s->nchannels)
292 switch ((offset >> 2) & 7) {
293 case 0: /* SrcAddr */
294 s->chan[i].src = value;
296 case 1: /* DestAddr */
297 s->chan[i].dest = value;
300 s->chan[i].lli = value;
302 case 3: /* Control */
303 s->chan[i].ctrl = value;
305 case 4: /* Configuration */
306 s->chan[i].conf = value;
312 switch (offset >> 2) {
313 case 2: /* IntTCClear */
316 case 4: /* IntErrorClear */
317 s->err_int &= ~value;
319 case 8: /* SoftBReq */
320 case 9: /* SoftSReq */
321 case 10: /* SoftLBReq */
322 case 11: /* SoftLSReq */
323 /* ??? Implement these. */
324 qemu_log_mask(LOG_UNIMP, "pl080_write: Soft DMA not implemented\n");
326 case 12: /* Configuration */
328 if (s->conf & (PL080_CONF_M1 | PL080_CONF_M2)) {
329 qemu_log_mask(LOG_UNIMP,
330 "pl080_write: Big-endian DMA not implemented\n");
339 qemu_log_mask(LOG_GUEST_ERROR,
340 "pl080_write: Bad offset %x\n", (int)offset);
345 static const MemoryRegionOps pl080_ops = {
347 .write = pl080_write,
348 .endianness = DEVICE_NATIVE_ENDIAN,
351 static void pl080_reset(DeviceState *dev)
353 PL080State *s = PL080(dev);
366 for (i = 0; i < s->nchannels; i++) {
375 static void pl080_init(Object *obj)
377 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
378 PL080State *s = PL080(obj);
380 memory_region_init_io(&s->iomem, OBJECT(s), &pl080_ops, s, "pl080", 0x1000);
381 sysbus_init_mmio(sbd, &s->iomem);
382 sysbus_init_irq(sbd, &s->irq);
383 sysbus_init_irq(sbd, &s->interr);
384 sysbus_init_irq(sbd, &s->inttc);
388 static void pl080_realize(DeviceState *dev, Error **errp)
390 PL080State *s = PL080(dev);
392 if (!s->downstream) {
393 error_setg(errp, "PL080 'downstream' link not set");
397 address_space_init(&s->downstream_as, s->downstream, "pl080-downstream");
400 static void pl081_init(Object *obj)
402 PL080State *s = PL080(obj);
407 static Property pl080_properties[] = {
408 DEFINE_PROP_LINK("downstream", PL080State, downstream,
409 TYPE_MEMORY_REGION, MemoryRegion *),
410 DEFINE_PROP_END_OF_LIST(),
413 static void pl080_class_init(ObjectClass *oc, void *data)
415 DeviceClass *dc = DEVICE_CLASS(oc);
417 dc->vmsd = &vmstate_pl080;
418 dc->realize = pl080_realize;
419 dc->props = pl080_properties;
420 dc->reset = pl080_reset;
423 static const TypeInfo pl080_info = {
425 .parent = TYPE_SYS_BUS_DEVICE,
426 .instance_size = sizeof(PL080State),
427 .instance_init = pl080_init,
428 .class_init = pl080_class_init,
431 static const TypeInfo pl081_info = {
433 .parent = TYPE_PL080,
434 .instance_init = pl081_init,
437 /* The PL080 and PL081 are the same except for the number of channels
438 they implement (8 and 2 respectively). */
439 static void pl080_register_types(void)
441 type_register_static(&pl080_info);
442 type_register_static(&pl081_info);
445 type_init(pl080_register_types)