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 #define PL080_MAX_CHANNELS 8
15 #define PL080_CONF_E 0x1
16 #define PL080_CONF_M1 0x2
17 #define PL080_CONF_M2 0x4
19 #define PL080_CCONF_H 0x40000
20 #define PL080_CCONF_A 0x20000
21 #define PL080_CCONF_L 0x10000
22 #define PL080_CCONF_ITC 0x08000
23 #define PL080_CCONF_IE 0x04000
24 #define PL080_CCONF_E 0x00001
26 #define PL080_CCTRL_I 0x80000000
27 #define PL080_CCTRL_DI 0x08000000
28 #define PL080_CCTRL_SI 0x04000000
29 #define PL080_CCTRL_D 0x02000000
30 #define PL080_CCTRL_S 0x01000000
40 #define TYPE_PL080 "pl080"
41 #define PL080(obj) OBJECT_CHECK(PL080State, (obj), TYPE_PL080)
43 typedef struct PL080State {
44 SysBusDevice parent_obj;
55 pl080_channel chan[PL080_MAX_CHANNELS];
57 /* Flag to avoid recursive DMA invocations. */
62 static const VMStateDescription vmstate_pl080_channel = {
63 .name = "pl080_channel",
65 .minimum_version_id = 1,
66 .fields = (VMStateField[]) {
67 VMSTATE_UINT32(src, pl080_channel),
68 VMSTATE_UINT32(dest, pl080_channel),
69 VMSTATE_UINT32(lli, pl080_channel),
70 VMSTATE_UINT32(ctrl, pl080_channel),
71 VMSTATE_UINT32(conf, pl080_channel),
76 static const VMStateDescription vmstate_pl080 = {
79 .minimum_version_id = 1,
80 .fields = (VMStateField[]) {
81 VMSTATE_UINT8(tc_int, PL080State),
82 VMSTATE_UINT8(tc_mask, PL080State),
83 VMSTATE_UINT8(err_int, PL080State),
84 VMSTATE_UINT8(err_mask, PL080State),
85 VMSTATE_UINT32(conf, PL080State),
86 VMSTATE_UINT32(sync, PL080State),
87 VMSTATE_UINT32(req_single, PL080State),
88 VMSTATE_UINT32(req_burst, PL080State),
89 VMSTATE_UINT8(tc_int, PL080State),
90 VMSTATE_UINT8(tc_int, PL080State),
91 VMSTATE_UINT8(tc_int, PL080State),
92 VMSTATE_STRUCT_ARRAY(chan, PL080State, PL080_MAX_CHANNELS,
93 1, vmstate_pl080_channel, pl080_channel),
94 VMSTATE_INT32(running, PL080State),
99 static const unsigned char pl080_id[] =
100 { 0x80, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
102 static const unsigned char pl081_id[] =
103 { 0x81, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
105 static void pl080_update(PL080State *s)
107 if ((s->tc_int & s->tc_mask)
108 || (s->err_int & s->err_mask))
109 qemu_irq_raise(s->irq);
111 qemu_irq_lower(s->irq);
114 static void pl080_run(PL080State *s)
130 for (c = 0; c < s->nchannels; c++) {
131 if (s->chan[c].conf & PL080_CCONF_ITC)
132 s->tc_mask |= 1 << c;
133 if (s->chan[c].conf & PL080_CCONF_IE)
134 s->err_mask |= 1 << c;
137 if ((s->conf & PL080_CONF_E) == 0)
140 hw_error("DMA active\n");
141 /* If we are already in the middle of a DMA operation then indicate that
142 there may be new DMA requests and return immediately. */
149 for (c = 0; c < s->nchannels; c++) {
152 /* Test if thiws channel has any pending DMA requests. */
153 if ((ch->conf & (PL080_CCONF_H | PL080_CCONF_E))
156 flow = (ch->conf >> 11) & 7;
159 "pl080_run: Peripheral flow control not implemented\n");
161 src_id = (ch->conf >> 1) & 0x1f;
162 dest_id = (ch->conf >> 6) & 0x1f;
163 size = ch->ctrl & 0xfff;
164 req = s->req_single | s->req_burst;
169 if ((req & (1u << dest_id)) == 0)
173 if ((req & (1u << src_id)) == 0)
177 if ((req & (1u << src_id)) == 0
178 || (req & (1u << dest_id)) == 0)
185 /* Transfer one element. */
186 /* ??? Should transfer multiple elements for a burst request. */
187 /* ??? Unclear what the proper behavior is when source and
188 destination widths are different. */
189 swidth = 1 << ((ch->ctrl >> 18) & 7);
190 dwidth = 1 << ((ch->ctrl >> 21) & 7);
191 for (n = 0; n < dwidth; n+= swidth) {
192 cpu_physical_memory_read(ch->src, buff + n, swidth);
193 if (ch->ctrl & PL080_CCTRL_SI)
196 xsize = (dwidth < swidth) ? swidth : dwidth;
197 /* ??? This may pad the value incorrectly for dwidth < 32. */
198 for (n = 0; n < xsize; n += dwidth) {
199 cpu_physical_memory_write(ch->dest + n, buff + n, dwidth);
200 if (ch->ctrl & PL080_CCTRL_DI)
205 ch->ctrl = (ch->ctrl & 0xfffff000) | size;
207 /* Transfer complete. */
209 ch->src = address_space_ldl_le(&address_space_memory,
211 MEMTXATTRS_UNSPECIFIED,
213 ch->dest = address_space_ldl_le(&address_space_memory,
215 MEMTXATTRS_UNSPECIFIED,
217 ch->ctrl = address_space_ldl_le(&address_space_memory,
219 MEMTXATTRS_UNSPECIFIED,
221 ch->lli = address_space_ldl_le(&address_space_memory,
223 MEMTXATTRS_UNSPECIFIED,
226 ch->conf &= ~PL080_CCONF_E;
228 if (ch->ctrl & PL080_CCTRL_I) {
239 static uint64_t pl080_read(void *opaque, hwaddr offset,
242 PL080State *s = (PL080State *)opaque;
246 if (offset >= 0xfe0 && offset < 0x1000) {
247 if (s->nchannels == 8) {
248 return pl080_id[(offset - 0xfe0) >> 2];
250 return pl081_id[(offset - 0xfe0) >> 2];
253 if (offset >= 0x100 && offset < 0x200) {
254 i = (offset & 0xe0) >> 5;
255 if (i >= s->nchannels)
257 switch (offset >> 2) {
258 case 0: /* SrcAddr */
259 return s->chan[i].src;
260 case 1: /* DestAddr */
261 return s->chan[i].dest;
263 return s->chan[i].lli;
264 case 3: /* Control */
265 return s->chan[i].ctrl;
266 case 4: /* Configuration */
267 return s->chan[i].conf;
272 switch (offset >> 2) {
273 case 0: /* IntStatus */
274 return (s->tc_int & s->tc_mask) | (s->err_int & s->err_mask);
275 case 1: /* IntTCStatus */
276 return (s->tc_int & s->tc_mask);
277 case 3: /* IntErrorStatus */
278 return (s->err_int & s->err_mask);
279 case 5: /* RawIntTCStatus */
281 case 6: /* RawIntErrorStatus */
283 case 7: /* EnbldChns */
285 for (i = 0; i < s->nchannels; i++) {
286 if (s->chan[i].conf & PL080_CCONF_E)
290 case 8: /* SoftBReq */
291 case 9: /* SoftSReq */
292 case 10: /* SoftLBReq */
293 case 11: /* SoftLSReq */
294 /* ??? Implement these. */
296 case 12: /* Configuration */
302 qemu_log_mask(LOG_GUEST_ERROR,
303 "pl080_read: Bad offset %x\n", (int)offset);
308 static void pl080_write(void *opaque, hwaddr offset,
309 uint64_t value, unsigned size)
311 PL080State *s = (PL080State *)opaque;
314 if (offset >= 0x100 && offset < 0x200) {
315 i = (offset & 0xe0) >> 5;
316 if (i >= s->nchannels)
318 switch (offset >> 2) {
319 case 0: /* SrcAddr */
320 s->chan[i].src = value;
322 case 1: /* DestAddr */
323 s->chan[i].dest = value;
326 s->chan[i].lli = value;
328 case 3: /* Control */
329 s->chan[i].ctrl = value;
331 case 4: /* Configuration */
332 s->chan[i].conf = value;
337 switch (offset >> 2) {
338 case 2: /* IntTCClear */
341 case 4: /* IntErrorClear */
342 s->err_int &= ~value;
344 case 8: /* SoftBReq */
345 case 9: /* SoftSReq */
346 case 10: /* SoftLBReq */
347 case 11: /* SoftLSReq */
348 /* ??? Implement these. */
349 qemu_log_mask(LOG_UNIMP, "pl080_write: Soft DMA not implemented\n");
351 case 12: /* Configuration */
353 if (s->conf & (PL080_CONF_M1 | PL080_CONF_M1)) {
354 qemu_log_mask(LOG_UNIMP,
355 "pl080_write: Big-endian DMA not implemented\n");
364 qemu_log_mask(LOG_GUEST_ERROR,
365 "pl080_write: Bad offset %x\n", (int)offset);
370 static const MemoryRegionOps pl080_ops = {
372 .write = pl080_write,
373 .endianness = DEVICE_NATIVE_ENDIAN,
376 static void pl080_init(Object *obj)
378 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
379 PL080State *s = PL080(obj);
381 memory_region_init_io(&s->iomem, OBJECT(s), &pl080_ops, s, "pl080", 0x1000);
382 sysbus_init_mmio(sbd, &s->iomem);
383 sysbus_init_irq(sbd, &s->irq);
387 static void pl081_init(Object *obj)
389 PL080State *s = PL080(obj);
394 static void pl080_class_init(ObjectClass *oc, void *data)
396 DeviceClass *dc = DEVICE_CLASS(oc);
398 dc->vmsd = &vmstate_pl080;
401 static const TypeInfo pl080_info = {
403 .parent = TYPE_SYS_BUS_DEVICE,
404 .instance_size = sizeof(PL080State),
405 .instance_init = pl080_init,
406 .class_init = pl080_class_init,
409 static const TypeInfo pl081_info = {
411 .parent = TYPE_PL080,
412 .instance_init = pl081_init,
415 /* The PL080 and PL081 are the same except for the number of channels
416 they implement (8 and 2 respectively). */
417 static void pl080_register_types(void)
419 type_register_static(&pl080_info);
420 type_register_static(&pl081_info);
423 type_init(pl080_register_types)