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-rw-r--r--hw/omap_gpmc.c713
1 files changed, 578 insertions, 135 deletions
diff --git a/hw/omap_gpmc.c b/hw/omap_gpmc.c
index 673dddd237..02f0c52107 100644
--- a/hw/omap_gpmc.c
+++ b/hw/omap_gpmc.c
@@ -27,82 +27,410 @@
/* General-Purpose Memory Controller */
struct omap_gpmc_s {
qemu_irq irq;
+ qemu_irq drq;
MemoryRegion iomem;
+ int accept_256;
+ uint8_t revision;
uint8_t sysconfig;
uint16_t irqst;
uint16_t irqen;
+ uint16_t lastirq;
uint16_t timeout;
uint16_t config;
- uint32_t prefconfig[2];
- int prefcontrol;
- int preffifo;
- int prefcount;
struct omap_gpmc_cs_file_s {
uint32_t config[7];
- target_phys_addr_t base;
- size_t size;
MemoryRegion *iomem;
MemoryRegion container;
- void (*base_update)(void *opaque, target_phys_addr_t new);
- void (*unmap)(void *opaque);
- void *opaque;
+ MemoryRegion nandiomem;
+ DeviceState *dev;
} cs_file[8];
int ecc_cs;
int ecc_ptr;
uint32_t ecc_cfg;
ECCState ecc[9];
+ struct prefetch {
+ uint32_t config1; /* GPMC_PREFETCH_CONFIG1 */
+ uint32_t transfercount; /* GPMC_PREFETCH_CONFIG2:TRANSFERCOUNT */
+ int startengine; /* GPMC_PREFETCH_CONTROL:STARTENGINE */
+ int fifopointer; /* GPMC_PREFETCH_STATUS:FIFOPOINTER */
+ int count; /* GPMC_PREFETCH_STATUS:COUNTVALUE */
+ MemoryRegion iomem;
+ uint8_t fifo[64];
+ } prefetch;
};
+#define OMAP_GPMC_8BIT 0
+#define OMAP_GPMC_16BIT 1
+#define OMAP_GPMC_NOR 0
+#define OMAP_GPMC_NAND 2
+
+static int omap_gpmc_devtype(struct omap_gpmc_cs_file_s *f)
+{
+ return (f->config[0] >> 10) & 3;
+}
+
+static int omap_gpmc_devsize(struct omap_gpmc_cs_file_s *f)
+{
+ /* devsize field is really 2 bits but we ignore the high
+ * bit to ensure consistent behaviour if the guest sets
+ * it (values 2 and 3 are reserved in the TRM)
+ */
+ return (f->config[0] >> 12) & 1;
+}
+
+/* Extract the chip-select value from the prefetch config1 register */
+static int prefetch_cs(uint32_t config1)
+{
+ return (config1 >> 24) & 7;
+}
+
+static int prefetch_threshold(uint32_t config1)
+{
+ return (config1 >> 8) & 0x7f;
+}
+
static void omap_gpmc_int_update(struct omap_gpmc_s *s)
{
- qemu_set_irq(s->irq, s->irqen & s->irqst);
+ /* The TRM is a bit unclear, but it seems to say that
+ * the TERMINALCOUNTSTATUS bit is set only on the
+ * transition when the prefetch engine goes from
+ * active to inactive, whereas the FIFOEVENTSTATUS
+ * bit is held high as long as the fifo has at
+ * least THRESHOLD bytes available.
+ * So we do the latter here, but TERMINALCOUNTSTATUS
+ * is set elsewhere.
+ */
+ if (s->prefetch.fifopointer >= prefetch_threshold(s->prefetch.config1)) {
+ s->irqst |= 1;
+ }
+ if ((s->irqen & s->irqst) != s->lastirq) {
+ s->lastirq = s->irqen & s->irqst;
+ qemu_set_irq(s->irq, s->lastirq);
+ }
}
-static void omap_gpmc_cs_map(struct omap_gpmc_cs_file_s *f, int base, int mask)
+static void omap_gpmc_dma_update(struct omap_gpmc_s *s, int value)
{
- /* TODO: check for overlapping regions and report access errors */
- if ((mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf) ||
- (base < 0 || base >= 0x40) ||
- (base & 0x0f & ~mask)) {
- fprintf(stderr, "%s: wrong cs address mapping/decoding!\n",
- __FUNCTION__);
+ if (s->prefetch.config1 & 4) {
+ qemu_set_irq(s->drq, value);
+ }
+}
+
+/* Access functions for when a NAND-like device is mapped into memory:
+ * all addresses in the region behave like accesses to the relevant
+ * GPMC_NAND_DATA_i register (which is actually implemented to call these)
+ */
+static uint64_t omap_nand_read(void *opaque, target_phys_addr_t addr,
+ unsigned size)
+{
+ struct omap_gpmc_cs_file_s *f = (struct omap_gpmc_cs_file_s *)opaque;
+ uint64_t v;
+ nand_setpins(f->dev, 0, 0, 0, 1, 0);
+ switch (omap_gpmc_devsize(f)) {
+ case OMAP_GPMC_8BIT:
+ v = nand_getio(f->dev);
+ if (size == 1) {
+ return v;
+ }
+ v |= (nand_getio(f->dev) << 8);
+ if (size == 2) {
+ return v;
+ }
+ v |= (nand_getio(f->dev) << 16);
+ v |= (nand_getio(f->dev) << 24);
+ return v;
+ case OMAP_GPMC_16BIT:
+ v = nand_getio(f->dev);
+ if (size == 1) {
+ /* 8 bit read from 16 bit device : probably a guest bug */
+ return v & 0xff;
+ }
+ if (size == 2) {
+ return v;
+ }
+ v |= (nand_getio(f->dev) << 16);
+ return v;
+ default:
+ abort();
+ }
+}
+
+static void omap_nand_setio(DeviceState *dev, uint64_t value,
+ int nandsize, int size)
+{
+ /* Write the specified value to the NAND device, respecting
+ * both size of the NAND device and size of the write access.
+ */
+ switch (nandsize) {
+ case OMAP_GPMC_8BIT:
+ switch (size) {
+ case 1:
+ nand_setio(dev, value & 0xff);
+ break;
+ case 2:
+ nand_setio(dev, value & 0xff);
+ nand_setio(dev, (value >> 8) & 0xff);
+ break;
+ case 4:
+ default:
+ nand_setio(dev, value & 0xff);
+ nand_setio(dev, (value >> 8) & 0xff);
+ nand_setio(dev, (value >> 16) & 0xff);
+ nand_setio(dev, (value >> 24) & 0xff);
+ break;
+ }
+ case OMAP_GPMC_16BIT:
+ switch (size) {
+ case 1:
+ /* writing to a 16bit device with 8bit access is probably a guest
+ * bug; pass the value through anyway.
+ */
+ case 2:
+ nand_setio(dev, value & 0xffff);
+ break;
+ case 4:
+ default:
+ nand_setio(dev, value & 0xffff);
+ nand_setio(dev, (value >> 16) & 0xffff);
+ break;
+ }
+ }
+}
+
+static void omap_nand_write(void *opaque, target_phys_addr_t addr,
+ uint64_t value, unsigned size)
+{
+ struct omap_gpmc_cs_file_s *f = (struct omap_gpmc_cs_file_s *)opaque;
+ nand_setpins(f->dev, 0, 0, 0, 1, 0);
+ omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
+}
+
+static const MemoryRegionOps omap_nand_ops = {
+ .read = omap_nand_read,
+ .write = omap_nand_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void fill_prefetch_fifo(struct omap_gpmc_s *s)
+{
+ /* Fill the prefetch FIFO by reading data from NAND.
+ * We do this synchronously, unlike the hardware which
+ * will do this asynchronously. We refill when the
+ * FIFO has THRESHOLD bytes free, and we always refill
+ * as much data as possible starting at the top end
+ * of the FIFO.
+ * (We have to refill at THRESHOLD rather than waiting
+ * for the FIFO to empty to allow for the case where
+ * the FIFO size isn't an exact multiple of THRESHOLD
+ * and we're doing DMA transfers.)
+ * This means we never need to handle wrap-around in
+ * the fifo-reading code, and the next byte of data
+ * to read is always fifo[63 - fifopointer].
+ */
+ int fptr;
+ int cs = prefetch_cs(s->prefetch.config1);
+ int is16bit = (((s->cs_file[cs].config[0] >> 12) & 3) != 0);
+ int bytes;
+ /* Don't believe the bit of the OMAP TRM that says that COUNTVALUE
+ * and TRANSFERCOUNT are in units of 16 bit words for 16 bit NAND.
+ * Instead believe the bit that says it is always a byte count.
+ */
+ bytes = 64 - s->prefetch.fifopointer;
+ if (bytes > s->prefetch.count) {
+ bytes = s->prefetch.count;
+ }
+ s->prefetch.count -= bytes;
+ s->prefetch.fifopointer += bytes;
+ fptr = 64 - s->prefetch.fifopointer;
+ /* Move the existing data in the FIFO so it sits just
+ * before what we're about to read in
+ */
+ while (fptr < (64 - bytes)) {
+ s->prefetch.fifo[fptr] = s->prefetch.fifo[fptr + bytes];
+ fptr++;
+ }
+ while (fptr < 64) {
+ if (is16bit) {
+ uint32_t v = omap_nand_read(&s->cs_file[cs], 0, 2);
+ s->prefetch.fifo[fptr++] = v & 0xff;
+ s->prefetch.fifo[fptr++] = (v >> 8) & 0xff;
+ } else {
+ s->prefetch.fifo[fptr++] = omap_nand_read(&s->cs_file[cs], 0, 1);
+ }
+ }
+ if (s->prefetch.startengine && (s->prefetch.count == 0)) {
+ /* This was the final transfer: raise TERMINALCOUNTSTATUS */
+ s->irqst |= 2;
+ s->prefetch.startengine = 0;
+ }
+ /* If there are any bytes in the FIFO at this point then
+ * we must raise a DMA request (either this is a final part
+ * transfer, or we filled the FIFO in which case we certainly
+ * have THRESHOLD bytes available)
+ */
+ if (s->prefetch.fifopointer != 0) {
+ omap_gpmc_dma_update(s, 1);
+ }
+ omap_gpmc_int_update(s);
+}
+
+/* Access functions for a NAND-like device when the prefetch/postwrite
+ * engine is enabled -- all addresses in the region behave alike:
+ * data is read or written to the FIFO.
+ */
+static uint64_t omap_gpmc_prefetch_read(void *opaque, target_phys_addr_t addr,
+ unsigned size)
+{
+ struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
+ uint32_t data;
+ if (s->prefetch.config1 & 1) {
+ /* The TRM doesn't define the behaviour if you read from the
+ * FIFO when the prefetch engine is in write mode. We choose
+ * to always return zero.
+ */
+ return 0;
+ }
+ /* Note that trying to read an empty fifo repeats the last byte */
+ if (s->prefetch.fifopointer) {
+ s->prefetch.fifopointer--;
+ }
+ data = s->prefetch.fifo[63 - s->prefetch.fifopointer];
+ if (s->prefetch.fifopointer ==
+ (64 - prefetch_threshold(s->prefetch.config1))) {
+ /* We've drained THRESHOLD bytes now. So deassert the
+ * DMA request, then refill the FIFO (which will probably
+ * assert it again.)
+ */
+ omap_gpmc_dma_update(s, 0);
+ fill_prefetch_fifo(s);
+ }
+ omap_gpmc_int_update(s);
+ return data;
+}
+
+static void omap_gpmc_prefetch_write(void *opaque, target_phys_addr_t addr,
+ uint64_t value, unsigned size)
+{
+ struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
+ int cs = prefetch_cs(s->prefetch.config1);
+ if ((s->prefetch.config1 & 1) == 0) {
+ /* The TRM doesn't define the behaviour of writing to the
+ * FIFO when the prefetch engine is in read mode. We
+ * choose to ignore the write.
+ */
+ return;
+ }
+ if (s->prefetch.count == 0) {
+ /* The TRM doesn't define the behaviour of writing to the
+ * FIFO if the transfer is complete. We choose to ignore.
+ */
return;
}
+ /* The only reason we do any data buffering in postwrite
+ * mode is if we are talking to a 16 bit NAND device, in
+ * which case we need to buffer the first byte of the
+ * 16 bit word until the other byte arrives.
+ */
+ int is16bit = (((s->cs_file[cs].config[0] >> 12) & 3) != 0);
+ if (is16bit) {
+ /* fifopointer alternates between 64 (waiting for first
+ * byte of word) and 63 (waiting for second byte)
+ */
+ if (s->prefetch.fifopointer == 64) {
+ s->prefetch.fifo[0] = value;
+ s->prefetch.fifopointer--;
+ } else {
+ value = (value << 8) | s->prefetch.fifo[0];
+ omap_nand_write(&s->cs_file[cs], 0, value, 2);
+ s->prefetch.count--;
+ s->prefetch.fifopointer = 64;
+ }
+ } else {
+ /* Just write the byte : fifopointer remains 64 at all times */
+ omap_nand_write(&s->cs_file[cs], 0, value, 1);
+ s->prefetch.count--;
+ }
+ if (s->prefetch.count == 0) {
+ /* Final transfer: raise TERMINALCOUNTSTATUS */
+ s->irqst |= 2;
+ s->prefetch.startengine = 0;
+ }
+ omap_gpmc_int_update(s);
+}
+
+static const MemoryRegionOps omap_prefetch_ops = {
+ .read = omap_gpmc_prefetch_read,
+ .write = omap_gpmc_prefetch_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .impl.min_access_size = 1,
+ .impl.max_access_size = 1,
+};
- if (!f->opaque)
+static MemoryRegion *omap_gpmc_cs_memregion(struct omap_gpmc_s *s, int cs)
+{
+ /* Return the MemoryRegion* to map/unmap for this chipselect */
+ struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
+ if (omap_gpmc_devtype(f) == OMAP_GPMC_NOR) {
+ return f->iomem;
+ }
+ if ((s->prefetch.config1 & 0x80) &&
+ (prefetch_cs(s->prefetch.config1) == cs)) {
+ /* The prefetch engine is enabled for this CS: map the FIFO */
+ return &s->prefetch.iomem;
+ }
+ return &f->nandiomem;
+}
+
+static void omap_gpmc_cs_map(struct omap_gpmc_s *s, int cs)
+{
+ struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
+ uint32_t mask = (f->config[6] >> 8) & 0xf;
+ uint32_t base = f->config[6] & 0x3f;
+ uint32_t size;
+
+ if (!f->iomem && !f->dev) {
+ return;
+ }
+
+ if (!(f->config[6] & (1 << 6))) {
+ /* Do nothing unless CSVALID */
return;
+ }
- f->base = base << 24;
- f->size = (0x0fffffff & ~(mask << 24)) + 1;
+ /* TODO: check for overlapping regions and report access errors */
+ if (mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf
+ && !(s->accept_256 && !mask)) {
+ fprintf(stderr, "%s: invalid chip-select mask address (0x%x)\n",
+ __func__, mask);
+ }
+
+ base <<= 24;
+ size = (0x0fffffff & ~(mask << 24)) + 1;
/* TODO: rather than setting the size of the mapping (which should be
* constant), the mask should cause wrapping of the address space, so
* that the same memory becomes accessible at every <i>size</i> bytes
* starting from <i>base</i>. */
- if (f->iomem) {
- memory_region_init(&f->container, "omap-gpmc-file", f->size);
- memory_region_add_subregion(&f->container, 0, f->iomem);
- memory_region_add_subregion(get_system_memory(), f->base,
- &f->container);
- }
-
- if (f->base_update)
- f->base_update(f->opaque, f->base);
+ memory_region_init(&f->container, "omap-gpmc-file", size);
+ memory_region_add_subregion(&f->container, 0,
+ omap_gpmc_cs_memregion(s, cs));
+ memory_region_add_subregion(get_system_memory(), base,
+ &f->container);
}
-static void omap_gpmc_cs_unmap(struct omap_gpmc_cs_file_s *f)
+static void omap_gpmc_cs_unmap(struct omap_gpmc_s *s, int cs)
{
- if (f->size) {
- if (f->unmap)
- f->unmap(f->opaque);
- if (f->iomem) {
- memory_region_del_subregion(get_system_memory(), &f->container);
- memory_region_del_subregion(&f->container, f->iomem);
- memory_region_destroy(&f->container);
- }
- f->base = 0;
- f->size = 0;
+ struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
+ if (!(f->config[6] & (1 << 6))) {
+ /* Do nothing unless CSVALID */
+ return;
+ }
+ if (!f->iomem && !f->dev) {
+ return;
}
+ memory_region_del_subregion(get_system_memory(), &f->container);
+ memory_region_del_subregion(&f->container, omap_gpmc_cs_memregion(s, cs));
+ memory_region_destroy(&f->container);
}
void omap_gpmc_reset(struct omap_gpmc_s *s)
@@ -115,25 +443,32 @@ void omap_gpmc_reset(struct omap_gpmc_s *s)
omap_gpmc_int_update(s);
s->timeout = 0;
s->config = 0xa00;
- s->prefconfig[0] = 0x00004000;
- s->prefconfig[1] = 0x00000000;
- s->prefcontrol = 0;
- s->preffifo = 0;
- s->prefcount = 0;
+ s->prefetch.config1 = 0x00004000;
+ s->prefetch.transfercount = 0x00000000;
+ s->prefetch.startengine = 0;
+ s->prefetch.fifopointer = 0;
+ s->prefetch.count = 0;
for (i = 0; i < 8; i ++) {
- if (s->cs_file[i].config[6] & (1 << 6)) /* CSVALID */
- omap_gpmc_cs_unmap(s->cs_file + i);
- s->cs_file[i].config[0] = i ? 1 << 12 : 0;
+ omap_gpmc_cs_unmap(s, i);
s->cs_file[i].config[1] = 0x101001;
s->cs_file[i].config[2] = 0x020201;
s->cs_file[i].config[3] = 0x10031003;
s->cs_file[i].config[4] = 0x10f1111;
s->cs_file[i].config[5] = 0;
s->cs_file[i].config[6] = 0xf00 | (i ? 0 : 1 << 6);
- if (s->cs_file[i].config[6] & (1 << 6)) /* CSVALID */
- omap_gpmc_cs_map(&s->cs_file[i],
- s->cs_file[i].config[6] & 0x1f, /* MASKADDR */
- (s->cs_file[i].config[6] >> 8 & 0xf)); /* BASEADDR */
+
+ s->cs_file[i].config[6] = 0xf00;
+ /* In theory we could probe attached devices for some CFG1
+ * bits here, but we just retain them across resets as they
+ * were set initially by omap_gpmc_attach().
+ */
+ if (i == 0) {
+ s->cs_file[i].config[0] &= 0x00433e00;
+ s->cs_file[i].config[6] |= 1 << 6; /* CSVALID */
+ omap_gpmc_cs_map(s, i);
+ } else {
+ s->cs_file[i].config[0] &= 0x00403c00;
+ }
}
s->ecc_cs = 0;
s->ecc_ptr = 0;
@@ -142,6 +477,24 @@ void omap_gpmc_reset(struct omap_gpmc_s *s)
ecc_reset(&s->ecc[i]);
}
+static int gpmc_wordaccess_only(target_phys_addr_t addr)
+{
+ /* Return true if the register offset is to a register that
+ * only permits word width accesses.
+ * Non-word accesses are only OK for GPMC_NAND_DATA/ADDRESS/COMMAND
+ * for any chipselect.
+ */
+ if (addr >= 0x60 && addr <= 0x1d4) {
+ int cs = (addr - 0x60) / 0x30;
+ addr -= cs * 0x30;
+ if (addr >= 0x7c && addr < 0x88) {
+ /* GPMC_NAND_COMMAND, GPMC_NAND_ADDRESS, GPMC_NAND_DATA */
+ return 0;
+ }
+ }
+ return 1;
+}
+
static uint64_t omap_gpmc_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
@@ -149,13 +502,13 @@ static uint64_t omap_gpmc_read(void *opaque, target_phys_addr_t addr,
int cs;
struct omap_gpmc_cs_file_s *f;
- if (size != 4) {
+ if (size != 4 && gpmc_wordaccess_only(addr)) {
return omap_badwidth_read32(opaque, addr);
}
switch (addr) {
case 0x000: /* GPMC_REVISION */
- return 0x20;
+ return s->revision;
case 0x010: /* GPMC_SYSCONFIG */
return s->sysconfig;
@@ -187,36 +540,39 @@ static uint64_t omap_gpmc_read(void *opaque, target_phys_addr_t addr,
addr -= cs * 0x30;
f = s->cs_file + cs;
switch (addr) {
- case 0x60: /* GPMC_CONFIG1 */
- return f->config[0];
- case 0x64: /* GPMC_CONFIG2 */
- return f->config[1];
- case 0x68: /* GPMC_CONFIG3 */
- return f->config[2];
- case 0x6c: /* GPMC_CONFIG4 */
- return f->config[3];
- case 0x70: /* GPMC_CONFIG5 */
- return f->config[4];
- case 0x74: /* GPMC_CONFIG6 */
- return f->config[5];
- case 0x78: /* GPMC_CONFIG7 */
- return f->config[6];
- case 0x84: /* GPMC_NAND_DATA */
- return 0;
+ case 0x60: /* GPMC_CONFIG1 */
+ return f->config[0];
+ case 0x64: /* GPMC_CONFIG2 */
+ return f->config[1];
+ case 0x68: /* GPMC_CONFIG3 */
+ return f->config[2];
+ case 0x6c: /* GPMC_CONFIG4 */
+ return f->config[3];
+ case 0x70: /* GPMC_CONFIG5 */
+ return f->config[4];
+ case 0x74: /* GPMC_CONFIG6 */
+ return f->config[5];
+ case 0x78: /* GPMC_CONFIG7 */
+ return f->config[6];
+ case 0x84 ... 0x87: /* GPMC_NAND_DATA */
+ if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
+ return omap_nand_read(f, 0, size);
+ }
+ return 0;
}
break;
case 0x1e0: /* GPMC_PREFETCH_CONFIG1 */
- return s->prefconfig[0];
+ return s->prefetch.config1;
case 0x1e4: /* GPMC_PREFETCH_CONFIG2 */
- return s->prefconfig[1];
+ return s->prefetch.transfercount;
case 0x1ec: /* GPMC_PREFETCH_CONTROL */
- return s->prefcontrol;
+ return s->prefetch.startengine;
case 0x1f0: /* GPMC_PREFETCH_STATUS */
- return (s->preffifo << 24) |
- ((s->preffifo >
- ((s->prefconfig[0] >> 8) & 0x7f) ? 1 : 0) << 16) |
- s->prefcount;
+ return (s->prefetch.fifopointer << 24) |
+ ((s->prefetch.fifopointer >=
+ ((s->prefetch.config1 >> 8) & 0x7f) ? 1 : 0) << 16) |
+ s->prefetch.count;
case 0x1f4: /* GPMC_ECC_CONFIG */
return s->ecc_cs;
@@ -251,7 +607,7 @@ static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
int cs;
struct omap_gpmc_cs_file_s *f;
- if (size != 4) {
+ if (size != 4 && gpmc_wordaccess_only(addr)) {
return omap_badwidth_write32(opaque, addr, value);
}
@@ -276,7 +632,7 @@ static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
break;
case 0x018: /* GPMC_IRQSTATUS */
- s->irqen = ~value;
+ s->irqen &= ~value;
omap_gpmc_int_update(s);
break;
@@ -302,62 +658,109 @@ static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
addr -= cs * 0x30;
f = s->cs_file + cs;
switch (addr) {
- case 0x60: /* GPMC_CONFIG1 */
- f->config[0] = value & 0xffef3e13;
- break;
- case 0x64: /* GPMC_CONFIG2 */
- f->config[1] = value & 0x001f1f8f;
- break;
- case 0x68: /* GPMC_CONFIG3 */
- f->config[2] = value & 0x001f1f8f;
- break;
- case 0x6c: /* GPMC_CONFIG4 */
- f->config[3] = value & 0x1f8f1f8f;
- break;
- case 0x70: /* GPMC_CONFIG5 */
- f->config[4] = value & 0x0f1f1f1f;
- break;
- case 0x74: /* GPMC_CONFIG6 */
- f->config[5] = value & 0x00000fcf;
- break;
- case 0x78: /* GPMC_CONFIG7 */
- if ((f->config[6] ^ value) & 0xf7f) {
- if (f->config[6] & (1 << 6)) /* CSVALID */
- omap_gpmc_cs_unmap(f);
- if (value & (1 << 6)) /* CSVALID */
- omap_gpmc_cs_map(f, value & 0x1f, /* MASKADDR */
- (value >> 8 & 0xf)); /* BASEADDR */
- }
+ case 0x60: /* GPMC_CONFIG1 */
+ f->config[0] = value & 0xffef3e13;
+ break;
+ case 0x64: /* GPMC_CONFIG2 */
+ f->config[1] = value & 0x001f1f8f;
+ break;
+ case 0x68: /* GPMC_CONFIG3 */
+ f->config[2] = value & 0x001f1f8f;
+ break;
+ case 0x6c: /* GPMC_CONFIG4 */
+ f->config[3] = value & 0x1f8f1f8f;
+ break;
+ case 0x70: /* GPMC_CONFIG5 */
+ f->config[4] = value & 0x0f1f1f1f;
+ break;
+ case 0x74: /* GPMC_CONFIG6 */
+ f->config[5] = value & 0x00000fcf;
+ break;
+ case 0x78: /* GPMC_CONFIG7 */
+ if ((f->config[6] ^ value) & 0xf7f) {
+ omap_gpmc_cs_unmap(s, cs);
f->config[6] = value & 0x00000f7f;
- break;
- case 0x7c: /* GPMC_NAND_COMMAND */
- case 0x80: /* GPMC_NAND_ADDRESS */
- case 0x84: /* GPMC_NAND_DATA */
- break;
-
- default:
- goto bad_reg;
+ omap_gpmc_cs_map(s, cs);
+ }
+ break;
+ case 0x7c ... 0x7f: /* GPMC_NAND_COMMAND */
+ if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
+ nand_setpins(f->dev, 1, 0, 0, 1, 0); /* CLE */
+ omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
+ }
+ break;
+ case 0x80 ... 0x83: /* GPMC_NAND_ADDRESS */
+ if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
+ nand_setpins(f->dev, 0, 1, 0, 1, 0); /* ALE */
+ omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
+ }
+ break;
+ case 0x84 ... 0x87: /* GPMC_NAND_DATA */
+ if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
+ omap_nand_write(f, 0, value, size);
+ }
+ break;
+ default:
+ goto bad_reg;
}
break;
case 0x1e0: /* GPMC_PREFETCH_CONFIG1 */
- s->prefconfig[0] = value & 0x7f8f7fbf;
- /* TODO: update interrupts, fifos, dmas */
+ if (!s->prefetch.startengine) {
+ uint32_t oldconfig1 = s->prefetch.config1;
+ uint32_t changed;
+ s->prefetch.config1 = value & 0x7f8f7fbf;
+ changed = oldconfig1 ^ s->prefetch.config1;
+ if (changed & (0x80 | 0x7000000)) {
+ /* Turning the engine on or off, or mapping it somewhere else.
+ * cs_map() and cs_unmap() check the prefetch config and
+ * overall CSVALID bits, so it is sufficient to unmap-and-map
+ * both the old cs and the new one.
+ */
+ int oldcs = prefetch_cs(oldconfig1);
+ int newcs = prefetch_cs(s->prefetch.config1);
+ omap_gpmc_cs_unmap(s, oldcs);
+ omap_gpmc_cs_map(s, oldcs);
+ if (newcs != oldcs) {
+ omap_gpmc_cs_unmap(s, newcs);
+ omap_gpmc_cs_map(s, newcs);
+ }
+ }
+ }
break;
case 0x1e4: /* GPMC_PREFETCH_CONFIG2 */
- s->prefconfig[1] = value & 0x3fff;
+ if (!s->prefetch.startengine) {
+ s->prefetch.transfercount = value & 0x3fff;
+ }
break;
case 0x1ec: /* GPMC_PREFETCH_CONTROL */
- s->prefcontrol = value & 1;
- if (s->prefcontrol) {
- if (s->prefconfig[0] & 1)
- s->preffifo = 0x40;
- else
- s->preffifo = 0x00;
+ if (s->prefetch.startengine != (value & 1)) {
+ s->prefetch.startengine = value & 1;
+ if (s->prefetch.startengine) {
+ /* Prefetch engine start */
+ s->prefetch.count = s->prefetch.transfercount;
+ if (s->prefetch.config1 & 1) {
+ /* Write */
+ s->prefetch.fifopointer = 64;
+ } else {
+ /* Read */
+ s->prefetch.fifopointer = 0;
+ fill_prefetch_fifo(s);
+ }
+ } else {
+ /* Prefetch engine forcibly stopped. The TRM
+ * doesn't define the behaviour if you do this.
+ * We clear the prefetch count, which means that
+ * we permit no more writes, and don't read any
+ * more data from NAND. The CPU can still drain
+ * the FIFO of unread data.
+ */
+ s->prefetch.count = 0;
+ }
+ omap_gpmc_int_update(s);
}
- /* TODO: start */
break;
case 0x1f4: /* GPMC_ECC_CONFIG */
@@ -394,24 +797,47 @@ static const MemoryRegionOps omap_gpmc_ops = {
.endianness = DEVICE_NATIVE_ENDIAN,
};
-struct omap_gpmc_s *omap_gpmc_init(target_phys_addr_t base, qemu_irq irq)
+struct omap_gpmc_s *omap_gpmc_init(struct omap_mpu_state_s *mpu,
+ target_phys_addr_t base,
+ qemu_irq irq, qemu_irq drq)
{
+ int cs;
struct omap_gpmc_s *s = (struct omap_gpmc_s *)
g_malloc0(sizeof(struct omap_gpmc_s));
- omap_gpmc_reset(s);
-
memory_region_init_io(&s->iomem, &omap_gpmc_ops, s, "omap-gpmc", 0x1000);
memory_region_add_subregion(get_system_memory(), base, &s->iomem);
+ s->irq = irq;
+ s->drq = drq;
+ s->accept_256 = cpu_is_omap3630(mpu);
+ s->revision = cpu_class_omap3(mpu) ? 0x50 : 0x20;
+ s->lastirq = 0;
+ omap_gpmc_reset(s);
+
+ /* We have to register a different IO memory handler for each
+ * chip select region in case a NAND device is mapped there. We
+ * make the region the worst-case size of 256MB and rely on the
+ * container memory region in cs_map to chop it down to the actual
+ * guest-requested size.
+ */
+ for (cs = 0; cs < 8; cs++) {
+ memory_region_init_io(&s->cs_file[cs].nandiomem,
+ &omap_nand_ops,
+ &s->cs_file[cs],
+ "omap-nand",
+ 256 * 1024 * 1024);
+ }
+
+ memory_region_init_io(&s->prefetch.iomem, &omap_prefetch_ops, s,
+ "omap-gpmc-prefetch", 256 * 1024 * 1024);
return s;
}
-void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, MemoryRegion *iomem,
- void (*base_upd)(void *opaque, target_phys_addr_t new),
- void (*unmap)(void *opaque), void *opaque)
+void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, MemoryRegion *iomem)
{
struct omap_gpmc_cs_file_s *f;
+ assert(iomem);
if (cs < 0 || cs >= 8) {
fprintf(stderr, "%s: bad chip-select %i\n", __FUNCTION__, cs);
@@ -419,12 +845,29 @@ void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, MemoryRegion *iomem,
}
f = &s->cs_file[cs];
+ omap_gpmc_cs_unmap(s, cs);
+ f->config[0] &= ~(0xf << 10);
f->iomem = iomem;
- f->base_update = base_upd;
- f->unmap = unmap;
- f->opaque = opaque;
+ omap_gpmc_cs_map(s, cs);
+}
- if (f->config[6] & (1 << 6)) /* CSVALID */
- omap_gpmc_cs_map(f, f->config[6] & 0x1f, /* MASKADDR */
- (f->config[6] >> 8 & 0xf)); /* BASEADDR */
+void omap_gpmc_attach_nand(struct omap_gpmc_s *s, int cs, DeviceState *nand)
+{
+ struct omap_gpmc_cs_file_s *f;
+ assert(nand);
+
+ if (cs < 0 || cs >= 8) {
+ fprintf(stderr, "%s: bad chip-select %i\n", __func__, cs);
+ exit(-1);
+ }
+ f = &s->cs_file[cs];
+
+ omap_gpmc_cs_unmap(s, cs);
+ f->config[0] &= ~(0xf << 10);
+ f->config[0] |= (OMAP_GPMC_NAND << 10);
+ f->dev = nand;
+ if (nand_getbuswidth(f->dev) == 16) {
+ f->config[0] |= OMAP_GPMC_16BIT << 12;
+ }
+ omap_gpmc_cs_map(s, cs);
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-23 23:02:09 +0000