2
* TI OMAP general purpose memory controller emulation.
4
* Copyright (C) 2007-2009 Nokia Corporation
5
* Original code written by Andrzej Zaborowski <andrew@openedhand.com>
6
* Enhancements for OMAP3 and NAND support written by Juha Riihimäki
8
* This program is free software; you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation; either version 2 or
11
* (at your option) any later version of the License.
13
* This program is distributed in the hope that it will be useful,
14
* but WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
18
* You should have received a copy of the GNU General Public License along
19
* with this program; if not, see <http://www.gnu.org/licenses/>.
25
#include "exec-memory.h"
27
/* General-Purpose Memory Controller */
41
struct omap_gpmc_cs_file_s {
44
MemoryRegion container;
45
MemoryRegion nandiomem;
53
uint32_t config1; /* GPMC_PREFETCH_CONFIG1 */
54
uint32_t transfercount; /* GPMC_PREFETCH_CONFIG2:TRANSFERCOUNT */
55
int startengine; /* GPMC_PREFETCH_CONTROL:STARTENGINE */
56
int fifopointer; /* GPMC_PREFETCH_STATUS:FIFOPOINTER */
57
int count; /* GPMC_PREFETCH_STATUS:COUNTVALUE */
63
#define OMAP_GPMC_8BIT 0
64
#define OMAP_GPMC_16BIT 1
65
#define OMAP_GPMC_NOR 0
66
#define OMAP_GPMC_NAND 2
68
static int omap_gpmc_devtype(struct omap_gpmc_cs_file_s *f)
70
return (f->config[0] >> 10) & 3;
73
static int omap_gpmc_devsize(struct omap_gpmc_cs_file_s *f)
75
/* devsize field is really 2 bits but we ignore the high
76
* bit to ensure consistent behaviour if the guest sets
77
* it (values 2 and 3 are reserved in the TRM)
79
return (f->config[0] >> 12) & 1;
82
/* Extract the chip-select value from the prefetch config1 register */
83
static int prefetch_cs(uint32_t config1)
85
return (config1 >> 24) & 7;
88
static int prefetch_threshold(uint32_t config1)
90
return (config1 >> 8) & 0x7f;
93
static void omap_gpmc_int_update(struct omap_gpmc_s *s)
95
/* The TRM is a bit unclear, but it seems to say that
96
* the TERMINALCOUNTSTATUS bit is set only on the
97
* transition when the prefetch engine goes from
98
* active to inactive, whereas the FIFOEVENTSTATUS
99
* bit is held high as long as the fifo has at
100
* least THRESHOLD bytes available.
101
* So we do the latter here, but TERMINALCOUNTSTATUS
104
if (s->prefetch.fifopointer >= prefetch_threshold(s->prefetch.config1)) {
107
if ((s->irqen & s->irqst) != s->lastirq) {
108
s->lastirq = s->irqen & s->irqst;
109
qemu_set_irq(s->irq, s->lastirq);
113
static void omap_gpmc_dma_update(struct omap_gpmc_s *s, int value)
115
if (s->prefetch.config1 & 4) {
116
qemu_set_irq(s->drq, value);
120
/* Access functions for when a NAND-like device is mapped into memory:
121
* all addresses in the region behave like accesses to the relevant
122
* GPMC_NAND_DATA_i register (which is actually implemented to call these)
124
static uint64_t omap_nand_read(void *opaque, target_phys_addr_t addr,
127
struct omap_gpmc_cs_file_s *f = (struct omap_gpmc_cs_file_s *)opaque;
129
nand_setpins(f->dev, 0, 0, 0, 1, 0);
130
switch (omap_gpmc_devsize(f)) {
132
v = nand_getio(f->dev);
136
v |= (nand_getio(f->dev) << 8);
140
v |= (nand_getio(f->dev) << 16);
141
v |= (nand_getio(f->dev) << 24);
143
case OMAP_GPMC_16BIT:
144
v = nand_getio(f->dev);
146
/* 8 bit read from 16 bit device : probably a guest bug */
152
v |= (nand_getio(f->dev) << 16);
159
static void omap_nand_setio(DeviceState *dev, uint64_t value,
160
int nandsize, int size)
162
/* Write the specified value to the NAND device, respecting
163
* both size of the NAND device and size of the write access.
169
nand_setio(dev, value & 0xff);
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nand_setio(dev, value & 0xff);
173
nand_setio(dev, (value >> 8) & 0xff);
177
nand_setio(dev, value & 0xff);
178
nand_setio(dev, (value >> 8) & 0xff);
179
nand_setio(dev, (value >> 16) & 0xff);
180
nand_setio(dev, (value >> 24) & 0xff);
184
case OMAP_GPMC_16BIT:
187
/* writing to a 16bit device with 8bit access is probably a guest
188
* bug; pass the value through anyway.
191
nand_setio(dev, value & 0xffff);
195
nand_setio(dev, value & 0xffff);
196
nand_setio(dev, (value >> 16) & 0xffff);
203
static void omap_nand_write(void *opaque, target_phys_addr_t addr,
204
uint64_t value, unsigned size)
206
struct omap_gpmc_cs_file_s *f = (struct omap_gpmc_cs_file_s *)opaque;
207
nand_setpins(f->dev, 0, 0, 0, 1, 0);
208
omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
211
static const MemoryRegionOps omap_nand_ops = {
212
.read = omap_nand_read,
213
.write = omap_nand_write,
214
.endianness = DEVICE_NATIVE_ENDIAN,
217
static void fill_prefetch_fifo(struct omap_gpmc_s *s)
219
/* Fill the prefetch FIFO by reading data from NAND.
220
* We do this synchronously, unlike the hardware which
221
* will do this asynchronously. We refill when the
222
* FIFO has THRESHOLD bytes free, and we always refill
223
* as much data as possible starting at the top end
225
* (We have to refill at THRESHOLD rather than waiting
226
* for the FIFO to empty to allow for the case where
227
* the FIFO size isn't an exact multiple of THRESHOLD
228
* and we're doing DMA transfers.)
229
* This means we never need to handle wrap-around in
230
* the fifo-reading code, and the next byte of data
231
* to read is always fifo[63 - fifopointer].
234
int cs = prefetch_cs(s->prefetch.config1);
235
int is16bit = (((s->cs_file[cs].config[0] >> 12) & 3) != 0);
237
/* Don't believe the bit of the OMAP TRM that says that COUNTVALUE
238
* and TRANSFERCOUNT are in units of 16 bit words for 16 bit NAND.
239
* Instead believe the bit that says it is always a byte count.
241
bytes = 64 - s->prefetch.fifopointer;
242
if (bytes > s->prefetch.count) {
243
bytes = s->prefetch.count;
245
s->prefetch.count -= bytes;
246
s->prefetch.fifopointer += bytes;
247
fptr = 64 - s->prefetch.fifopointer;
248
/* Move the existing data in the FIFO so it sits just
249
* before what we're about to read in
251
while (fptr < (64 - bytes)) {
252
s->prefetch.fifo[fptr] = s->prefetch.fifo[fptr + bytes];
257
uint32_t v = omap_nand_read(&s->cs_file[cs], 0, 2);
258
s->prefetch.fifo[fptr++] = v & 0xff;
259
s->prefetch.fifo[fptr++] = (v >> 8) & 0xff;
261
s->prefetch.fifo[fptr++] = omap_nand_read(&s->cs_file[cs], 0, 1);
264
if (s->prefetch.startengine && (s->prefetch.count == 0)) {
265
/* This was the final transfer: raise TERMINALCOUNTSTATUS */
267
s->prefetch.startengine = 0;
269
/* If there are any bytes in the FIFO at this point then
270
* we must raise a DMA request (either this is a final part
271
* transfer, or we filled the FIFO in which case we certainly
272
* have THRESHOLD bytes available)
274
if (s->prefetch.fifopointer != 0) {
275
omap_gpmc_dma_update(s, 1);
277
omap_gpmc_int_update(s);
280
/* Access functions for a NAND-like device when the prefetch/postwrite
281
* engine is enabled -- all addresses in the region behave alike:
282
* data is read or written to the FIFO.
284
static uint64_t omap_gpmc_prefetch_read(void *opaque, target_phys_addr_t addr,
287
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
289
if (s->prefetch.config1 & 1) {
290
/* The TRM doesn't define the behaviour if you read from the
291
* FIFO when the prefetch engine is in write mode. We choose
292
* to always return zero.
296
/* Note that trying to read an empty fifo repeats the last byte */
297
if (s->prefetch.fifopointer) {
298
s->prefetch.fifopointer--;
300
data = s->prefetch.fifo[63 - s->prefetch.fifopointer];
301
if (s->prefetch.fifopointer ==
302
(64 - prefetch_threshold(s->prefetch.config1))) {
303
/* We've drained THRESHOLD bytes now. So deassert the
304
* DMA request, then refill the FIFO (which will probably
307
omap_gpmc_dma_update(s, 0);
308
fill_prefetch_fifo(s);
310
omap_gpmc_int_update(s);
314
static void omap_gpmc_prefetch_write(void *opaque, target_phys_addr_t addr,
315
uint64_t value, unsigned size)
317
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
318
int cs = prefetch_cs(s->prefetch.config1);
319
if ((s->prefetch.config1 & 1) == 0) {
320
/* The TRM doesn't define the behaviour of writing to the
321
* FIFO when the prefetch engine is in read mode. We
322
* choose to ignore the write.
326
if (s->prefetch.count == 0) {
327
/* The TRM doesn't define the behaviour of writing to the
328
* FIFO if the transfer is complete. We choose to ignore.
332
/* The only reason we do any data buffering in postwrite
333
* mode is if we are talking to a 16 bit NAND device, in
334
* which case we need to buffer the first byte of the
335
* 16 bit word until the other byte arrives.
337
int is16bit = (((s->cs_file[cs].config[0] >> 12) & 3) != 0);
339
/* fifopointer alternates between 64 (waiting for first
340
* byte of word) and 63 (waiting for second byte)
342
if (s->prefetch.fifopointer == 64) {
343
s->prefetch.fifo[0] = value;
344
s->prefetch.fifopointer--;
346
value = (value << 8) | s->prefetch.fifo[0];
347
omap_nand_write(&s->cs_file[cs], 0, value, 2);
349
s->prefetch.fifopointer = 64;
352
/* Just write the byte : fifopointer remains 64 at all times */
353
omap_nand_write(&s->cs_file[cs], 0, value, 1);
356
if (s->prefetch.count == 0) {
357
/* Final transfer: raise TERMINALCOUNTSTATUS */
359
s->prefetch.startengine = 0;
361
omap_gpmc_int_update(s);
364
static const MemoryRegionOps omap_prefetch_ops = {
365
.read = omap_gpmc_prefetch_read,
366
.write = omap_gpmc_prefetch_write,
367
.endianness = DEVICE_NATIVE_ENDIAN,
368
.impl.min_access_size = 1,
369
.impl.max_access_size = 1,
372
static MemoryRegion *omap_gpmc_cs_memregion(struct omap_gpmc_s *s, int cs)
374
/* Return the MemoryRegion* to map/unmap for this chipselect */
375
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
376
if (omap_gpmc_devtype(f) == OMAP_GPMC_NOR) {
379
if ((s->prefetch.config1 & 0x80) &&
380
(prefetch_cs(s->prefetch.config1) == cs)) {
381
/* The prefetch engine is enabled for this CS: map the FIFO */
382
return &s->prefetch.iomem;
384
return &f->nandiomem;
387
static void omap_gpmc_cs_map(struct omap_gpmc_s *s, int cs)
389
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
390
uint32_t mask = (f->config[6] >> 8) & 0xf;
391
uint32_t base = f->config[6] & 0x3f;
394
if (!f->iomem && !f->dev) {
398
if (!(f->config[6] & (1 << 6))) {
399
/* Do nothing unless CSVALID */
403
/* TODO: check for overlapping regions and report access errors */
404
if (mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf
405
&& !(s->accept_256 && !mask)) {
406
fprintf(stderr, "%s: invalid chip-select mask address (0x%x)\n",
411
size = (0x0fffffff & ~(mask << 24)) + 1;
412
/* TODO: rather than setting the size of the mapping (which should be
413
* constant), the mask should cause wrapping of the address space, so
414
* that the same memory becomes accessible at every <i>size</i> bytes
415
* starting from <i>base</i>. */
416
memory_region_init(&f->container, "omap-gpmc-file", size);
417
memory_region_add_subregion(&f->container, 0,
418
omap_gpmc_cs_memregion(s, cs));
419
memory_region_add_subregion(get_system_memory(), base,
423
static void omap_gpmc_cs_unmap(struct omap_gpmc_s *s, int cs)
425
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
426
if (!(f->config[6] & (1 << 6))) {
427
/* Do nothing unless CSVALID */
430
if (!f->iomem && !f->dev) {
433
memory_region_del_subregion(get_system_memory(), &f->container);
434
memory_region_del_subregion(&f->container, omap_gpmc_cs_memregion(s, cs));
435
memory_region_destroy(&f->container);
438
void omap_gpmc_reset(struct omap_gpmc_s *s)
445
omap_gpmc_int_update(s);
448
s->prefetch.config1 = 0x00004000;
449
s->prefetch.transfercount = 0x00000000;
450
s->prefetch.startengine = 0;
451
s->prefetch.fifopointer = 0;
452
s->prefetch.count = 0;
453
for (i = 0; i < 8; i ++) {
454
omap_gpmc_cs_unmap(s, i);
455
s->cs_file[i].config[1] = 0x101001;
456
s->cs_file[i].config[2] = 0x020201;
457
s->cs_file[i].config[3] = 0x10031003;
458
s->cs_file[i].config[4] = 0x10f1111;
459
s->cs_file[i].config[5] = 0;
460
s->cs_file[i].config[6] = 0xf00 | (i ? 0 : 1 << 6);
462
s->cs_file[i].config[6] = 0xf00;
463
/* In theory we could probe attached devices for some CFG1
464
* bits here, but we just retain them across resets as they
465
* were set initially by omap_gpmc_attach().
468
s->cs_file[i].config[0] &= 0x00433e00;
469
s->cs_file[i].config[6] |= 1 << 6; /* CSVALID */
470
omap_gpmc_cs_map(s, i);
472
s->cs_file[i].config[0] &= 0x00403c00;
477
s->ecc_cfg = 0x3fcff000;
478
for (i = 0; i < 9; i ++)
479
ecc_reset(&s->ecc[i]);
482
static int gpmc_wordaccess_only(target_phys_addr_t addr)
484
/* Return true if the register offset is to a register that
485
* only permits word width accesses.
486
* Non-word accesses are only OK for GPMC_NAND_DATA/ADDRESS/COMMAND
487
* for any chipselect.
489
if (addr >= 0x60 && addr <= 0x1d4) {
490
int cs = (addr - 0x60) / 0x30;
492
if (addr >= 0x7c && addr < 0x88) {
493
/* GPMC_NAND_COMMAND, GPMC_NAND_ADDRESS, GPMC_NAND_DATA */
500
static uint64_t omap_gpmc_read(void *opaque, target_phys_addr_t addr,
503
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
505
struct omap_gpmc_cs_file_s *f;
507
if (size != 4 && gpmc_wordaccess_only(addr)) {
508
return omap_badwidth_read32(opaque, addr);
512
case 0x000: /* GPMC_REVISION */
515
case 0x010: /* GPMC_SYSCONFIG */
518
case 0x014: /* GPMC_SYSSTATUS */
519
return 1; /* RESETDONE */
521
case 0x018: /* GPMC_IRQSTATUS */
524
case 0x01c: /* GPMC_IRQENABLE */
527
case 0x040: /* GPMC_TIMEOUT_CONTROL */
530
case 0x044: /* GPMC_ERR_ADDRESS */
531
case 0x048: /* GPMC_ERR_TYPE */
534
case 0x050: /* GPMC_CONFIG */
537
case 0x054: /* GPMC_STATUS */
540
case 0x060 ... 0x1d4:
541
cs = (addr - 0x060) / 0x30;
545
case 0x60: /* GPMC_CONFIG1 */
547
case 0x64: /* GPMC_CONFIG2 */
549
case 0x68: /* GPMC_CONFIG3 */
551
case 0x6c: /* GPMC_CONFIG4 */
553
case 0x70: /* GPMC_CONFIG5 */
555
case 0x74: /* GPMC_CONFIG6 */
557
case 0x78: /* GPMC_CONFIG7 */
559
case 0x84 ... 0x87: /* GPMC_NAND_DATA */
560
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
561
return omap_nand_read(f, 0, size);
567
case 0x1e0: /* GPMC_PREFETCH_CONFIG1 */
568
return s->prefetch.config1;
569
case 0x1e4: /* GPMC_PREFETCH_CONFIG2 */
570
return s->prefetch.transfercount;
571
case 0x1ec: /* GPMC_PREFETCH_CONTROL */
572
return s->prefetch.startengine;
573
case 0x1f0: /* GPMC_PREFETCH_STATUS */
574
/* NB: The OMAP3 TRM is inconsistent about whether the GPMC
575
* FIFOTHRESHOLDSTATUS bit should be set when
576
* FIFOPOINTER > FIFOTHRESHOLD or when it is >= FIFOTHRESHOLD.
577
* Apparently the underlying functional spec from which the TRM was
578
* created states that the behaviour is ">=", and this also
579
* makes more conceptual sense.
581
return (s->prefetch.fifopointer << 24) |
582
((s->prefetch.fifopointer >=
583
((s->prefetch.config1 >> 8) & 0x7f) ? 1 : 0) << 16) |
586
case 0x1f4: /* GPMC_ECC_CONFIG */
588
case 0x1f8: /* GPMC_ECC_CONTROL */
590
case 0x1fc: /* GPMC_ECC_SIZE_CONFIG */
592
case 0x200 ... 0x220: /* GPMC_ECC_RESULT */
593
cs = (addr & 0x1f) >> 2;
594
/* TODO: check correctness */
596
((s->ecc[cs].cp & 0x07) << 0) |
597
((s->ecc[cs].cp & 0x38) << 13) |
598
((s->ecc[cs].lp[0] & 0x1ff) << 3) |
599
((s->ecc[cs].lp[1] & 0x1ff) << 19);
601
case 0x230: /* GPMC_TESTMODE_CTRL */
603
case 0x234: /* GPMC_PSA_LSB */
604
case 0x238: /* GPMC_PSA_MSB */
612
static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
613
uint64_t value, unsigned size)
615
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
617
struct omap_gpmc_cs_file_s *f;
619
if (size != 4 && gpmc_wordaccess_only(addr)) {
620
return omap_badwidth_write32(opaque, addr, value);
624
case 0x000: /* GPMC_REVISION */
625
case 0x014: /* GPMC_SYSSTATUS */
626
case 0x054: /* GPMC_STATUS */
627
case 0x1f0: /* GPMC_PREFETCH_STATUS */
628
case 0x200 ... 0x220: /* GPMC_ECC_RESULT */
629
case 0x234: /* GPMC_PSA_LSB */
630
case 0x238: /* GPMC_PSA_MSB */
634
case 0x010: /* GPMC_SYSCONFIG */
635
if ((value >> 3) == 0x3)
636
fprintf(stderr, "%s: bad SDRAM idle mode %"PRIi64"\n",
637
__FUNCTION__, value >> 3);
640
s->sysconfig = value & 0x19;
643
case 0x018: /* GPMC_IRQSTATUS */
645
omap_gpmc_int_update(s);
648
case 0x01c: /* GPMC_IRQENABLE */
649
s->irqen = value & 0xf03;
650
omap_gpmc_int_update(s);
653
case 0x040: /* GPMC_TIMEOUT_CONTROL */
654
s->timeout = value & 0x1ff1;
657
case 0x044: /* GPMC_ERR_ADDRESS */
658
case 0x048: /* GPMC_ERR_TYPE */
661
case 0x050: /* GPMC_CONFIG */
662
s->config = value & 0xf13;
665
case 0x060 ... 0x1d4:
666
cs = (addr - 0x060) / 0x30;
670
case 0x60: /* GPMC_CONFIG1 */
671
f->config[0] = value & 0xffef3e13;
673
case 0x64: /* GPMC_CONFIG2 */
674
f->config[1] = value & 0x001f1f8f;
676
case 0x68: /* GPMC_CONFIG3 */
677
f->config[2] = value & 0x001f1f8f;
679
case 0x6c: /* GPMC_CONFIG4 */
680
f->config[3] = value & 0x1f8f1f8f;
682
case 0x70: /* GPMC_CONFIG5 */
683
f->config[4] = value & 0x0f1f1f1f;
685
case 0x74: /* GPMC_CONFIG6 */
686
f->config[5] = value & 0x00000fcf;
688
case 0x78: /* GPMC_CONFIG7 */
689
if ((f->config[6] ^ value) & 0xf7f) {
690
omap_gpmc_cs_unmap(s, cs);
691
f->config[6] = value & 0x00000f7f;
692
omap_gpmc_cs_map(s, cs);
695
case 0x7c ... 0x7f: /* GPMC_NAND_COMMAND */
696
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
697
nand_setpins(f->dev, 1, 0, 0, 1, 0); /* CLE */
698
omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
701
case 0x80 ... 0x83: /* GPMC_NAND_ADDRESS */
702
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
703
nand_setpins(f->dev, 0, 1, 0, 1, 0); /* ALE */
704
omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
707
case 0x84 ... 0x87: /* GPMC_NAND_DATA */
708
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
709
omap_nand_write(f, 0, value, size);
717
case 0x1e0: /* GPMC_PREFETCH_CONFIG1 */
718
if (!s->prefetch.startengine) {
719
uint32_t oldconfig1 = s->prefetch.config1;
721
s->prefetch.config1 = value & 0x7f8f7fbf;
722
changed = oldconfig1 ^ s->prefetch.config1;
723
if (changed & (0x80 | 0x7000000)) {
724
/* Turning the engine on or off, or mapping it somewhere else.
725
* cs_map() and cs_unmap() check the prefetch config and
726
* overall CSVALID bits, so it is sufficient to unmap-and-map
727
* both the old cs and the new one.
729
int oldcs = prefetch_cs(oldconfig1);
730
int newcs = prefetch_cs(s->prefetch.config1);
731
omap_gpmc_cs_unmap(s, oldcs);
732
omap_gpmc_cs_map(s, oldcs);
733
if (newcs != oldcs) {
734
omap_gpmc_cs_unmap(s, newcs);
735
omap_gpmc_cs_map(s, newcs);
741
case 0x1e4: /* GPMC_PREFETCH_CONFIG2 */
742
if (!s->prefetch.startengine) {
743
s->prefetch.transfercount = value & 0x3fff;
747
case 0x1ec: /* GPMC_PREFETCH_CONTROL */
748
if (s->prefetch.startengine != (value & 1)) {
749
s->prefetch.startengine = value & 1;
750
if (s->prefetch.startengine) {
751
/* Prefetch engine start */
752
s->prefetch.count = s->prefetch.transfercount;
753
if (s->prefetch.config1 & 1) {
755
s->prefetch.fifopointer = 64;
758
s->prefetch.fifopointer = 0;
759
fill_prefetch_fifo(s);
762
/* Prefetch engine forcibly stopped. The TRM
763
* doesn't define the behaviour if you do this.
764
* We clear the prefetch count, which means that
765
* we permit no more writes, and don't read any
766
* more data from NAND. The CPU can still drain
767
* the FIFO of unread data.
769
s->prefetch.count = 0;
771
omap_gpmc_int_update(s);
775
case 0x1f4: /* GPMC_ECC_CONFIG */
778
case 0x1f8: /* GPMC_ECC_CONTROL */
779
if (value & (1 << 8))
780
for (cs = 0; cs < 9; cs ++)
781
ecc_reset(&s->ecc[cs]);
782
s->ecc_ptr = value & 0xf;
783
if (s->ecc_ptr == 0 || s->ecc_ptr > 9) {
788
case 0x1fc: /* GPMC_ECC_SIZE_CONFIG */
789
s->ecc_cfg = value & 0x3fcff1ff;
791
case 0x230: /* GPMC_TESTMODE_CTRL */
793
fprintf(stderr, "%s: test mode enable attempt\n", __FUNCTION__);
803
static const MemoryRegionOps omap_gpmc_ops = {
804
.read = omap_gpmc_read,
805
.write = omap_gpmc_write,
806
.endianness = DEVICE_NATIVE_ENDIAN,
809
struct omap_gpmc_s *omap_gpmc_init(struct omap_mpu_state_s *mpu,
810
target_phys_addr_t base,
811
qemu_irq irq, qemu_irq drq)
814
struct omap_gpmc_s *s = (struct omap_gpmc_s *)
815
g_malloc0(sizeof(struct omap_gpmc_s));
817
memory_region_init_io(&s->iomem, &omap_gpmc_ops, s, "omap-gpmc", 0x1000);
818
memory_region_add_subregion(get_system_memory(), base, &s->iomem);
822
s->accept_256 = cpu_is_omap3630(mpu);
823
s->revision = cpu_class_omap3(mpu) ? 0x50 : 0x20;
827
/* We have to register a different IO memory handler for each
828
* chip select region in case a NAND device is mapped there. We
829
* make the region the worst-case size of 256MB and rely on the
830
* container memory region in cs_map to chop it down to the actual
831
* guest-requested size.
833
for (cs = 0; cs < 8; cs++) {
834
memory_region_init_io(&s->cs_file[cs].nandiomem,
841
memory_region_init_io(&s->prefetch.iomem, &omap_prefetch_ops, s,
842
"omap-gpmc-prefetch", 256 * 1024 * 1024);
846
void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, MemoryRegion *iomem)
848
struct omap_gpmc_cs_file_s *f;
851
if (cs < 0 || cs >= 8) {
852
fprintf(stderr, "%s: bad chip-select %i\n", __FUNCTION__, cs);
857
omap_gpmc_cs_unmap(s, cs);
858
f->config[0] &= ~(0xf << 10);
860
omap_gpmc_cs_map(s, cs);
863
void omap_gpmc_attach_nand(struct omap_gpmc_s *s, int cs, DeviceState *nand)
865
struct omap_gpmc_cs_file_s *f;
868
if (cs < 0 || cs >= 8) {
869
fprintf(stderr, "%s: bad chip-select %i\n", __func__, cs);
874
omap_gpmc_cs_unmap(s, cs);
875
f->config[0] &= ~(0xf << 10);
876
f->config[0] |= (OMAP_GPMC_NAND << 10);
878
if (nand_getbuswidth(f->dev) == 16) {
879
f->config[0] |= OMAP_GPMC_16BIT << 12;
881
omap_gpmc_cs_map(s, cs);