* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Chris Emmons
+ * Andreas Sandberg
*/
#include "dev/arm/hdlcd.hh"
#include "base/vnc/vncinput.hh"
#include "base/output.hh"
#include "base/trace.hh"
+#include "debug/Checkpoint.hh"
#include "debug/HDLcd.hh"
-#include "debug/Uart.hh"
#include "dev/arm/amba_device.hh"
#include "dev/arm/base_gic.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
+#include "params/HDLcd.hh"
#include "sim/system.hh"
using std::vector;
// initialize hdlcd registers
-HDLcd::HDLcd(const Params *p)
- : AmbaDmaDevice(p), version(VERSION_RESETV),
- int_rawstat(0), int_clear(0), int_mask(0), int_status(0),
+HDLcd::HDLcd(const HDLcdParams *p)
+ : AmbaDmaDevice(p, 0xFFFF),
+ // Parameters
+ vnc(p->vnc),
+ workaroundSwapRB(p->workaround_swap_rb),
+ workaroundDmaLineCount(p->workaround_dma_line_count),
+ addrRanges{RangeSize(pioAddr, pioSize)},
+ enableCapture(p->enable_capture),
+ pixelBufferSize(p->pixel_buffer_size),
+
+ // Registers
+ version(VERSION_RESETV),
+ int_rawstat(0), int_mask(0),
+
fb_base(0), fb_line_length(0), fb_line_count(0), fb_line_pitch(0),
bus_options(BUS_OPTIONS_RESETV),
+
v_sync(0), v_back_porch(0), v_data(0), v_front_porch(0),
h_sync(0), h_back_porch(0), h_data(0), h_front_porch(0),
- polarities(0), command(0), pixel_format(0),
- red_select(0), green_select(0), blue_select(0),
- pixelClock(p->pixel_clock),
- fb(0, 0), vnc(p->vnc), bmp(&fb), pic(NULL),
- frameReadStartTime(0),
- dmaStartAddr(0), dmaCurAddr(0), dmaMaxAddr(0), dmaPendingNum(0),
- frameUnderrun(false), pixelBufferSize(0),
- pixelIndex(0), doUpdateParams(false), frameUnderway(false),
- dmaBytesInFlight(0),
- startFrameEvent(this), endFrameEvent(this), renderPixelEvent(this),
- fillPixelBufferEvent(this), intEvent(this),
- dmaDoneEventAll(MAX_OUTSTANDING_DMA_REQ_CAPACITY, this),
- dmaDoneEventFree(MAX_OUTSTANDING_DMA_REQ_CAPACITY),
- enableCapture(p->enable_capture),
- workaround_swap_rb(p->workaround_swap_rb)
-{
- pioSize = 0xFFFF;
+ polarities(0),
- for (int i = 0; i < MAX_OUTSTANDING_DMA_REQ_CAPACITY; ++i)
- dmaDoneEventFree[i] = &dmaDoneEventAll[i];
+ command(0),
+
+ pixel_format(0),
+ red_select(0), green_select(0), blue_select(0),
+ // Other
+ bmp(&pixelPump.fb), pic(NULL), conv(PixelConverter::rgba8888_le),
+ pixelPump(*this, *p->pxl_clk, p->pixel_chunk)
+{
if (vnc)
- vnc->setFrameBuffer(&fb);
+ vnc->setFrameBuffer(&pixelPump.fb);
}
HDLcd::~HDLcd()
{
}
+void
+HDLcd::serialize(CheckpointOut &cp) const
+{
+ DPRINTF(Checkpoint, "Serializing ARM HDLCD\n");
+
+ SERIALIZE_SCALAR(int_rawstat);
+ SERIALIZE_SCALAR(int_mask);
+
+ SERIALIZE_SCALAR(fb_base);
+ SERIALIZE_SCALAR(fb_line_length);
+ SERIALIZE_SCALAR(fb_line_count);
+ SERIALIZE_SCALAR(fb_line_pitch);
+ SERIALIZE_SCALAR(bus_options);
+
+ SERIALIZE_SCALAR(v_sync);
+ SERIALIZE_SCALAR(v_back_porch);
+ SERIALIZE_SCALAR(v_data);
+ SERIALIZE_SCALAR(v_front_porch);
+
+ SERIALIZE_SCALAR(h_sync);
+ SERIALIZE_SCALAR(h_back_porch);
+ SERIALIZE_SCALAR(h_data);
+ SERIALIZE_SCALAR(h_front_porch);
+
+ SERIALIZE_SCALAR(polarities);
+
+ SERIALIZE_SCALAR(command);
+ SERIALIZE_SCALAR(pixel_format);
+ SERIALIZE_SCALAR(red_select);
+ SERIALIZE_SCALAR(green_select);
+ SERIALIZE_SCALAR(blue_select);
+
+ SERIALIZE_OBJ(pixelPump);
+ if (enabled())
+ dmaEngine->serializeSection(cp, "dmaEngine");
+}
+
+void
+HDLcd::unserialize(CheckpointIn &cp)
+{
+ DPRINTF(Checkpoint, "Unserializing ARM HDLCD\n");
+
+ UNSERIALIZE_SCALAR(int_rawstat);
+ UNSERIALIZE_SCALAR(int_mask);
+
+ UNSERIALIZE_SCALAR(fb_base);
+ UNSERIALIZE_SCALAR(fb_line_length);
+ UNSERIALIZE_SCALAR(fb_line_count);
+ UNSERIALIZE_SCALAR(fb_line_pitch);
+ UNSERIALIZE_SCALAR(bus_options);
+
+ UNSERIALIZE_SCALAR(v_sync);
+ UNSERIALIZE_SCALAR(v_back_porch);
+ UNSERIALIZE_SCALAR(v_data);
+ UNSERIALIZE_SCALAR(v_front_porch);
+
+ UNSERIALIZE_SCALAR(h_sync);
+ UNSERIALIZE_SCALAR(h_back_porch);
+ UNSERIALIZE_SCALAR(h_data);
+ UNSERIALIZE_SCALAR(h_front_porch);
+
+ UNSERIALIZE_SCALAR(polarities);
+
+ UNSERIALIZE_SCALAR(command);
+ UNSERIALIZE_SCALAR(pixel_format);
+ UNSERIALIZE_SCALAR(red_select);
+ UNSERIALIZE_SCALAR(green_select);
+ UNSERIALIZE_SCALAR(blue_select);
+
+ {
+ // Try to unserialize the pixel pump. It might not exist if
+ // we're unserializing an old checkpoint.
+ ScopedCheckpointSection sec(cp, "pixelPump");
+ if (cp.sectionExists(Serializable::currentSection()))
+ pixelPump.unserialize(cp);
+ }
+
+ if (enabled()) {
+ // Create the DMA engine and read its state from the
+ // checkpoint. We don't need to worry about the pixel pump as
+ // it is a proper SimObject.
+ createDmaEngine();
+ dmaEngine->unserializeSection(cp, "dmaEngine");
+
+ conv = pixelConverter();
+ }
+}
+
+void
+HDLcd::drainResume()
+{
+ AmbaDmaDevice::drainResume();
+
+ // We restored from an old checkpoint without a pixel pump, start
+ // an new refresh. This typically happens when restoring from old
+ // checkpoints.
+ if (enabled() && !pixelPump.active())
+ pixelPump.start(displayTimings());
+
+ // We restored from a checkpoint and need to update the VNC server
+ if (pixelPump.active() && vnc)
+ vnc->setDirty();
+}
+
// read registers and frame buffer
Tick
HDLcd::read(PacketPtr pkt)
{
- uint32_t data = 0;
- const Addr daddr = pkt->getAddr() - pioAddr;
-
- DPRINTF(HDLcd, "read register BASE+0x%04x size=%d\n", daddr,
- pkt->getSize());
-
assert(pkt->getAddr() >= pioAddr &&
- pkt->getAddr() < pioAddr + pioSize &&
- pkt->getSize() == 4);
+ pkt->getAddr() < pioAddr + pioSize);
- switch (daddr) {
- case Version:
- data = version;
- break;
- case Int_RawStat:
- data = int_rawstat;
- break;
- case Int_Clear:
- panic("HDLCD INT_CLEAR register is Write-Only\n");
- break;
- case Int_Mask:
- data = int_mask;
- break;
- case Int_Status:
- data = int_status;
- break;
- case Fb_Base:
- data = fb_base;
- break;
- case Fb_Line_Length:
- data = fb_line_length;
- break;
- case Fb_Line_Count:
- data = fb_line_count;
- break;
- case Fb_Line_Pitch:
- data = fb_line_pitch;
- break;
- case Bus_Options:
- data = bus_options;
- break;
- case V_Sync:
- data = v_sync;
- break;
- case V_Back_Porch:
- data = v_back_porch;
- break;
- case V_Data:
- data = v_data;
- break;
- case V_Front_Porch:
- data = v_front_porch;
- break;
- case H_Sync:
- data = h_sync;
- break;
- case H_Back_Porch:
- data = h_back_porch;
- break;
- case H_Data:
- data = h_data;
- break;
- case H_Front_Porch:
- data = h_front_porch;
- break;
- case Polarities:
- data = polarities;
- break;
- case Command:
- data = command;
- break;
- case Pixel_Format:
- data = pixel_format;
- break;
- case Red_Select:
- data = red_select;
- break;
- case Green_Select:
- data = green_select;
- break;
- case Blue_Select:
- data = blue_select;
- break;
- default:
- panic("Tried to read HDLCD register that doesn't exist\n", daddr);
- break;
- }
+ const Addr daddr(pkt->getAddr() - pioAddr);
+ panic_if(pkt->getSize() != 4,
+ "Unhandled read size (address: 0x.4x, size: %u)",
+ daddr, pkt->getSize());
+
+ const uint32_t data(readReg(daddr));
+ DPRINTF(HDLcd, "read register 0x%04x: 0x%x\n", daddr, data);
pkt->set<uint32_t>(data);
pkt->makeAtomicResponse();
HDLcd::write(PacketPtr pkt)
{
assert(pkt->getAddr() >= pioAddr &&
- pkt->getAddr() < pioAddr + pioSize &&
- pkt->getSize() == 4);
+ pkt->getAddr() < pioAddr + pioSize);
+
+ const Addr daddr(pkt->getAddr() - pioAddr);
+ panic_if(pkt->getSize() != 4,
+ "Unhandled read size (address: 0x.4x, size: %u)",
+ daddr, pkt->getSize());
+ const uint32_t data(pkt->get<uint32_t>());
+ DPRINTF(HDLcd, "write register 0x%04x: 0x%x\n", daddr, data);
- const uint32_t data = pkt->get<uint32_t>();
- const Addr daddr = pkt->getAddr() - pioAddr;
+ writeReg(daddr, data);
- DPRINTF(HDLcd, "write register BASE+%0x04x <= 0x%08x\n", daddr,
- pkt->get<uint32_t>());
+ pkt->makeAtomicResponse();
+ return pioDelay;
+}
- switch (daddr) {
+uint32_t
+HDLcd::readReg(Addr offset)
+{
+ switch (offset) {
+ case Version: return version;
+
+ case Int_RawStat: return int_rawstat;
+ case Int_Clear:
+ panic("HDLCD INT_CLEAR register is Write-Only\n");
+ case Int_Mask: return int_mask;
+ case Int_Status: return intStatus();
+
+ case Fb_Base: return fb_base;
+ case Fb_Line_Length: return fb_line_length;
+ case Fb_Line_Count: return fb_line_count;
+ case Fb_Line_Pitch: return fb_line_pitch;
+ case Bus_Options: return bus_options;
+
+ case V_Sync: return v_sync;
+ case V_Back_Porch: return v_back_porch;
+ case V_Data: return v_data;
+ case V_Front_Porch: return v_front_porch;
+ case H_Sync: return h_sync;
+ case H_Back_Porch: return h_back_porch;
+ case H_Data: return h_data;
+ case H_Front_Porch: return h_front_porch;
+ case Polarities: return polarities;
+
+ case Command: return command;
+ case Pixel_Format: return pixel_format;
+ case Red_Select: return red_select;
+ case Green_Select: return green_select;
+ case Blue_Select: return blue_select;
+
+ default:
+ panic("Tried to read HDLCD register that doesn't exist\n", offset);
+ }
+}
+
+void
+HDLcd::writeReg(Addr offset, uint32_t value)
+{
+ switch (offset) {
case Version:
panic("HDLCD VERSION register is read-Only\n");
- break;
+
case Int_RawStat:
- int_rawstat = data;
- break;
+ intRaise(value);
+ return;
case Int_Clear:
- int_clear = data;
- break;
+ intClear(value);
+ return;
case Int_Mask:
- int_mask = data;
- break;
+ intMask(value);
+ return;
case Int_Status:
panic("HDLCD INT_STATUS register is read-Only\n");
break;
+
case Fb_Base:
- fb_base = data;
- DPRINTF(HDLcd, "HDLCD Frame Buffer located at addr 0x%08x\n", fb_base);
- break;
+ fb_base = value;
+ return;
+
case Fb_Line_Length:
- fb_line_length = data;
- DPRINTF(HDLcd, "HDLCD res = %d x %d\n", width(), height());
- break;
+ fb_line_length = value;
+ return;
+
case Fb_Line_Count:
- fb_line_count = data;
- DPRINTF(HDLcd, "HDLCD res = %d x %d\n", width(), height());
- break;
+ fb_line_count = value;
+ return;
+
case Fb_Line_Pitch:
- fb_line_pitch = data;
- break;
+ fb_line_pitch = value;
+ return;
+
case Bus_Options: {
- BusOptsReg old_bus_options;
- old_bus_options = bus_options;
- bus_options = data;
- if (bus_options.max_outstanding != old_bus_options.max_outstanding)
- DPRINTF(HDLcd,
- "Changing HDLcd outstanding dma transactions from %d to %d\n",
- old_bus_options.max_outstanding, bus_options.max_outstanding);
- if (bus_options.burst_len != old_bus_options.burst_len)
- DPRINTF(HDLcd,
- "Changing HDLcd dma burst length from %d bytes to %d bytes\n",
- old_bus_options.burst_len, bus_options.burst_len); }
- break;
+ const BusOptsReg old_bus_options(bus_options);
+ bus_options = value;
+
+ if (bus_options.max_outstanding != old_bus_options.max_outstanding) {
+ DPRINTF(HDLcd,
+ "Changing HDLcd outstanding DMA transactions: %d -> %d\n",
+ old_bus_options.max_outstanding,
+ bus_options.max_outstanding);
+
+ }
+
+ if (bus_options.burst_len != old_bus_options.burst_len) {
+ DPRINTF(HDLcd,
+ "Changing HDLcd DMA burst flags: 0x%x -> 0x%x\n",
+ old_bus_options.burst_len, bus_options.burst_len);
+ }
+ } return;
+
case V_Sync:
- v_sync = data;
- break;
+ v_sync = value;
+ return;
case V_Back_Porch:
- v_back_porch = data;
- break;
+ v_back_porch = value;
+ return;
case V_Data:
- v_data = data;
- break;
+ v_data = value;
+ return;
case V_Front_Porch:
- v_front_porch = data;
- break;
+ v_front_porch = value;
+ return;
+
case H_Sync:
- h_sync = data;
- break;
+ h_sync = value;
+ return;
case H_Back_Porch:
- h_back_porch = data;
- break;
+ h_back_porch = value;
+ return;
case H_Data:
- h_data = data;
- break;
+ h_data = value;
+ return;
case H_Front_Porch:
- h_front_porch = data;
- break;
+ h_front_porch = value;
+ return;
+
case Polarities:
- polarities = data;
- break;
+ polarities = value;
+ return;
+
case Command: {
- CommandReg new_command;
- new_command = data;
- if (new_command.enable != command.enable) {
- DPRINTF(HDLcd, "HDLCD switched %s\n",
- new_command.enable==0 ? "off" : "on");
- if (new_command.enable) {
- doUpdateParams = true;
- if (!frameUnderway) {
- schedule(startFrameEvent, clockEdge());
- }
- }
- }
- command = new_command; }
- break;
+ const CommandReg new_command(value);
+
+ if (new_command.enable != command.enable) {
+ DPRINTF(HDLcd, "HDLCD switched %s\n",
+ new_command.enable ? "on" : "off");
+
+ if (new_command.enable) {
+ cmdEnable();
+ } else {
+ cmdDisable();
+ }
+ }
+ command = new_command;
+ } return;
+
case Pixel_Format:
- pixel_format = data;
- DPRINTF(HDLcd, "HDLCD res = %d x %d\n", width(), height());
- DPRINTF(HDLcd, "HDLCD bytes per pixel = %d\n", bytesPerPixel());
- DPRINTF(HDLcd, "HDLCD endianness = %s\n",
- pixel_format.big_endian ? "big" : "little");
- break;
+ pixel_format = value;
+ return;
+
case Red_Select:
- red_select = data;
- break;
+ red_select = value;
+ return;
case Green_Select:
- green_select = data;
- break;
+ green_select = value;
+ return;
case Blue_Select:
- blue_select = data;
- break;
+ blue_select = value;
+ return;
+
default:
- panic("Tried to write HDLCD register that doesn't exist\n", daddr);
- break;
+ panic("Tried to write HDLCD register that doesn't exist\n", offset);
+ return;
}
-
- pkt->makeAtomicResponse();
- return pioDelay;
}
-void
-HDLcd::updateVideoParams(bool unserializing = false)
+PixelConverter
+HDLcd::pixelConverter() const
{
- const uint16_t bpp M5_VAR_USED = bytesPerPixel() << 3;
-
- // Workaround configuration bugs where multiple display
- // controllers are attached to the same VNC server by reattaching
- // enabled devices. This isn't ideal, but works as long as only
- // one display controller is active at a time.
- if (command.enable && vnc)
- vnc->setFrameBuffer(&fb);
-
- // updating these parameters while LCD is enabled is not supported
- if (frameUnderway && !unserializing)
- panic("Attempting to change some HDLCD parameters while the controller"
- " is active is not allowed");
-
- // resize the virtualDisplayBuffer unless we are unserializing - it may
- // have changed size
- // there must be no outstanding DMA transactions for this to work
- if (!unserializing) {
- assert(dmaPendingNum == 0);
-
- virtualDisplayBuffer.resize(bytesPerPixel() * area());
- fb.resize(width(), height());
- fb.clear();
-
- std::fill(virtualDisplayBuffer.begin(), virtualDisplayBuffer.end(),
- 0);
+ ByteOrder byte_order(
+ pixel_format.big_endian ? BigEndianByteOrder : LittleEndianByteOrder);
+
+ /* Some Linux kernels have a broken driver that swaps the red and
+ * blue color select registers. */
+ if (!workaroundSwapRB) {
+ return PixelConverter(
+ pixel_format.bytes_per_pixel + 1,
+ red_select.offset, green_select.offset, blue_select.offset,
+ red_select.size, green_select.size, blue_select.size,
+ byte_order);
+ } else {
+ return PixelConverter(
+ pixel_format.bytes_per_pixel + 1,
+ blue_select.offset, green_select.offset, red_select.offset,
+ blue_select.size, green_select.size, red_select.size,
+ byte_order);
}
+}
- DPRINTF(HDLcd, "bpp = %d\n", bpp);
- DPRINTF(HDLcd, "display size = %d x %d\n", width(), height());
-#if TRACING_ON
- const size_t totalLinesPerFrame = v_back_porch.val + 1 +
- v_data.val + 1 +
- v_front_porch.val + 1 +
- v_sync.val + 1;
- const double fps = (double)SimClock::Frequency /
- (double)(PClksPerLine() * totalLinesPerFrame * pixelClock);
-#endif
- DPRINTF(HDLcd, "simulated refresh rate ~ %.1ffps generating ~ %.1fMB/s "
- "traffic ([%.1fMHz, T=%d sim clocks] pclk, %d bpp => %.1fMB/s peak requirement)\n",
- fps,
- fps * virtualDisplayBuffer.size() / 1024 / 1024,
- (double)SimClock::Frequency / pixelClock / 1000000.0,
- pixelClock,
- bpp,
- (double)(SimClock::Frequency / pixelClock * (bpp / 8)) / 1024 / 1024);
+DisplayTimings
+HDLcd::displayTimings() const
+{
+ return DisplayTimings(
+ h_data.val + 1, v_data.val + 1,
+ h_back_porch.val + 1, h_sync.val + 1, h_front_porch.val + 1,
+ v_back_porch.val + 1, v_sync.val + 1, v_front_porch.val + 1);
}
void
-HDLcd::startFrame()
+HDLcd::createDmaEngine()
{
- // 0. Check that we are in the appropriate state
- assert(!frameUnderway);
- if (!command.enable)
+ if (bus_options.max_outstanding == 0) {
+ warn("Maximum number of outstanding DMA transfers set to 0.");
return;
- DPRINTF(HDLcd, "Frame read started\n");
- if (doUpdateParams) {
- updateVideoParams();
- doUpdateParams = false;
}
- frameUnderway = true;
- assert(!virtualDisplayBuffer.empty());
- assert(pixelBufferSize == 0);
- assert(dmaBytesInFlight == 0);
- assert(dmaPendingNum == 0);
- assert(dmaDoneEventFree.size() == dmaDoneEventAll.size());
- assert(!renderPixelEvent.scheduled());
- // currently only support positive line pitches equal to the line length
- assert(width() * bytesPerPixel() == fb_line_pitch);
-
- // 1. Start DMA'ing the frame; subsequent transactions created as we go
- dmaCurAddr = dmaStartAddr = fb_base;
- dmaMaxAddr = static_cast<Addr>(width() * height() * bytesPerPixel()) +
- dmaCurAddr;
- frameReadStartTime = curTick();
- pixelIndex = 0;
- frameUnderrun = false;
- fillPixelBuffer();
-
- // 2. Schedule first pixelclock read; subsequent reads generated as we go
- Tick firstPixelReadTick = curTick() + pixelClock * (
- PClksPerLine() * (v_sync.val + 1 +
- v_back_porch.val + 1) +
- h_sync.val + 1 +
- h_back_porch.val + 1);
- schedule(renderPixelEvent, firstPixelReadTick);
+
+ const uint32_t dma_burst_flags(bus_options.burst_len);
+ const uint32_t dma_burst_len(
+ dma_burst_flags ?
+ (1UL << (findMsbSet(dma_burst_flags) - 1)) :
+ MAX_BURST_LEN);
+ // Some drivers seem to set the DMA line count incorrectly. This
+ // could either be a driver bug or a specification bug. Unlike for
+ // timings, the specification does not require 1 to be added to
+ // the DMA engine's line count.
+ const uint32_t dma_lines(
+ fb_line_count + (workaroundDmaLineCount ? 1 : 0));
+
+ dmaEngine.reset(new DmaEngine(
+ *this, pixelBufferSize,
+ AXI_PORT_WIDTH * dma_burst_len,
+ bus_options.max_outstanding,
+ fb_line_length, fb_line_pitch, dma_lines));
}
void
-HDLcd::fillPixelBuffer()
+HDLcd::cmdEnable()
{
- // - am I under the LCD dma transaction total?
- // - do I have more data to transfer?
- // - have I not yet underrun for this frame?
- // - is there room to put the data in the pixel buffer including any
- // outstanding dma transfers in flight?
- while ((dmaPendingNum < maxOutstandingDma()) &&
- (dmaMaxAddr > dmaCurAddr) &&
- !frameUnderrun &&
- bytesFreeInPixelBuffer() > dmaBurstLength() * AXI_PORT_WIDTH) {
- // try largest transaction size allowed first but switch to smaller
- // sizes for trailing bytes
- size_t transaction_size = dmaBurstLength() * AXI_PORT_WIDTH;
- while (transaction_size > (dmaMaxAddr - dmaCurAddr))
- transaction_size >>= 1;
- assert(transaction_size > 0);
-
- // concurrent dma reads need different dma done events
- // due to assertion in scheduling state
- ++dmaPendingNum;
-
- assert(!dmaDoneEventFree.empty());
- DmaDoneEvent *event(dmaDoneEventFree.back());
- dmaDoneEventFree.pop_back();
- assert(event);
- assert(!event->scheduled());
-
- // We use a uncachable request here because the requests from the CPU
- // will be uncacheable as well. If we have uncacheable and cacheable
- // requests in the memory system for the same address it won't be
- // pleased
- uint8_t *const dma_dst(
- virtualDisplayBuffer.data() + dmaCurAddr - dmaStartAddr);
- event->setTransactionSize(transaction_size);
- dmaPort.dmaAction(MemCmd::ReadReq, dmaCurAddr, transaction_size, event,
- dma_dst, 0, Request::UNCACHEABLE);
- dmaCurAddr += transaction_size;
- dmaBytesInFlight += transaction_size;
- }
+ createDmaEngine();
+ conv = pixelConverter();
+ pixelPump.start(displayTimings());
}
void
-HDLcd::renderPixel()
+HDLcd::cmdDisable()
{
- // try to handle multiple pixels at a time; doing so reduces the accuracy
- // of the underrun detection but lowers simulation overhead
- const size_t count = 32;
- assert(width() % count == 0); // not set up to handle trailing pixels
-
- // have we underrun on this frame anytime before?
- if (frameUnderrun) {
- // the LCD controller gives up on a frame if an underrun occurs and
- // resumes regular operation on the next frame
- pixelBufferSize = 0;
- } else {
- // did we underrun on this set of pixels?
- if (pixelBufferSize < bytesPerPixel() * count) {
- warn("HDLcd controller buffer underrun\n");
- frameUnderrun = true;
- int_rawstat.underrun = 1;
- if (!intEvent.scheduled())
- schedule(intEvent, clockEdge());
- } else {
- // emulate the pixel read from the internal buffer
- pixelBufferSize -= bytesPerPixel() * count;
- }
- }
+ pixelPump.stop();
+ dmaEngine->abortFrame();
+}
- // the DMA may have previously stalled due to the buffer being full;
- // give it a kick; it knows not to fill if at end of frame, underrun, etc
- if (!fillPixelBufferEvent.scheduled())
- schedule(fillPixelBufferEvent, clockEdge());
-
- // schedule the next pixel read according to where it is in the frame
- pixelIndex += count;
- assert(pixelIndex <= width() * height());
- size_t x = pixelIndex % width();
- Tick nextEventTick = curTick();
- if (x == 0) {
- // start of new line
- nextEventTick += pixelClock * ((h_front_porch.val + 1) +
- (h_back_porch.val + 1) +
- (h_sync.val + 1));
- if (pixelIndex == width() * height()) {
- // end of frame
- nextEventTick += PClksPerLine() * (v_front_porch.val + 1) *
- pixelClock;
- schedule(endFrameEvent, nextEventTick);
- return;
- }
+bool
+HDLcd::pxlNext(Pixel &p)
+{
+ uint8_t pixel_data[MAX_PIXEL_SIZE];
+ assert(conv.length <= sizeof(pixel_data));
+ if (dmaEngine->tryGet(pixel_data, conv.length)) {
+ p = conv.toPixel(pixel_data);
+ return true;
} else {
- nextEventTick += pixelClock * count;
+ return false;
}
-
- schedule(renderPixelEvent, nextEventTick);
}
-PixelConverter
-HDLcd::pixelConverter() const
+void
+HDLcd::pxlVSyncBegin()
{
- ByteOrder byte_order(
- pixel_format.big_endian ? BigEndianByteOrder : LittleEndianByteOrder);
+ DPRINTF(HDLcd, "Raising VSYNC interrupt.\n");
+ intRaise(INT_VSYNC);
+}
- /* Some Linux kernels have a broken driver that swaps the red and
- * blue color select registers. */
- if (!workaround_swap_rb) {
- return PixelConverter(
- bytesPerPixel(),
- red_select.offset, green_select.offset, blue_select.offset,
- red_select.size, green_select.size, blue_select.size,
- byte_order);
- } else {
- return PixelConverter(
- bytesPerPixel(),
- blue_select.offset, green_select.offset, red_select.offset,
- blue_select.size, green_select.size, red_select.size,
- byte_order);
- }
+void
+HDLcd::pxlVSyncEnd()
+{
+ DPRINTF(HDLcd, "End of VSYNC, starting DMA engine\n");
+ dmaEngine->startFrame(fb_base);
}
void
-HDLcd::endFrame() {
- assert(pixelBufferSize == 0);
- assert(dmaPendingNum == 0);
- assert(dmaBytesInFlight == 0);
- assert(dmaDoneEventFree.size() == dmaDoneEventAll.size());
+HDLcd::pxlUnderrun()
+{
+ DPRINTF(HDLcd, "Buffer underrun, stopping DMA fill.\n");
+ intRaise(INT_UNDERRUN);
+ dmaEngine->abortFrame();
+}
- fb.copyIn(virtualDisplayBuffer, pixelConverter());
+void
+HDLcd::pxlFrameDone()
+{
+ DPRINTF(HDLcd, "Reached end of last visible line.\n");
+
+ if (dmaEngine->size()) {
+ warn("HDLCD %u bytes still in FIFO after frame: Ensure that DMA "
+ "and PixelPump configuration is consistent\n",
+ dmaEngine->size());
+ dmaEngine->dumpSettings();
+ pixelPump.dumpSettings();
+ }
if (vnc)
vnc->setDirty();
if (enableCapture) {
- if (!pic)
- pic = simout.create(csprintf("%s.framebuffer.bmp", sys->name()), true);
+ if (!pic) {
+ pic = simout.create(
+ csprintf("%s.framebuffer.bmp", sys->name()),
+ true);
+ }
assert(pic);
pic->seekp(0);
bmp.write(*pic);
}
-
- // start the next frame
- frameUnderway = false;
- startFrame();
}
void
-HDLcd::dmaDone(DmaDoneEvent *event)
+HDLcd::setInterrupts(uint32_t ints, uint32_t mask)
{
- const size_t transactionLength = event->getTransactionSize();
- assert(pixelBufferSize + transactionLength < PIXEL_BUFFER_CAPACITY);
- assert(dmaCurAddr <= dmaMaxAddr);
-
- dmaDoneEventFree.push_back(event);
- --dmaPendingNum;
- assert(MAX_OUTSTANDING_DMA_REQ_CAPACITY - dmaDoneEventFree.size() ==
- dmaPendingNum);
-
- // add the data to the pixel buffer
- dmaBytesInFlight -= transactionLength;
- pixelBufferSize += transactionLength;
-
- // schedule another dma transaction if:
- // - we're not done reading the frame
- // - there is sufficient room in the pixel buffer for another transaction
- // - another fillPixelBufferEvent is not already scheduled
- const size_t targetTransSize = dmaBurstLength() * AXI_PORT_WIDTH;
- if ((dmaCurAddr < dmaMaxAddr) &&
- (bytesFreeInPixelBuffer() + targetTransSize < PIXEL_BUFFER_CAPACITY) &&
- !fillPixelBufferEvent.scheduled()) {
- schedule(fillPixelBufferEvent, clockEdge());
+ const bool old_ints(intStatus());
+
+ int_mask = mask;
+ int_rawstat = ints;
+
+ if (!old_ints && intStatus()) {
+ gic->sendInt(intNum);
+ } else if (old_ints && !intStatus()) {
+ gic->clearInt(intNum);
}
}
-void
-HDLcd::serialize(CheckpointOut &cp) const
+HDLcd::DmaEngine::DmaEngine(HDLcd &_parent, size_t size,
+ unsigned request_size, unsigned max_pending,
+ size_t line_size, ssize_t line_pitch, unsigned num_lines)
+ : DmaReadFifo(
+ _parent.dmaPort, size, request_size, max_pending,
+ Request::UNCACHEABLE),
+ parent(_parent),
+ lineSize(line_size), linePitch(line_pitch), numLines(num_lines),
+ nextLineAddr(0)
{
- DPRINTF(HDLcd, "Serializing ARM HDLCD\n");
-
- const uint32_t version_serial = version;
- SERIALIZE_SCALAR(version_serial);
- const uint32_t int_rawstat_serial = int_rawstat;
- SERIALIZE_SCALAR(int_rawstat_serial);
- const uint32_t int_clear_serial = int_clear;
- SERIALIZE_SCALAR(int_clear_serial);
- const uint32_t int_mask_serial = int_mask;
- SERIALIZE_SCALAR(int_mask_serial);
- const uint32_t int_status_serial = int_status;
- SERIALIZE_SCALAR(int_status_serial);
+}
- SERIALIZE_SCALAR(fb_base);
- SERIALIZE_SCALAR(fb_line_length);
+void
+HDLcd::DmaEngine::serialize(CheckpointOut &cp) const
+{
+ DmaReadFifo::serialize(cp);
- const uint32_t fb_line_count_serial = fb_line_count;
- SERIALIZE_SCALAR(fb_line_count_serial);
+ SERIALIZE_SCALAR(nextLineAddr);
+ SERIALIZE_SCALAR(frameEnd);
+}
- SERIALIZE_SCALAR(fb_line_pitch);
+void
+HDLcd::DmaEngine::unserialize(CheckpointIn &cp)
+{
+ DmaReadFifo::unserialize(cp);
- const uint32_t bus_options_serial = bus_options;
- SERIALIZE_SCALAR(bus_options_serial);
- const uint32_t v_sync_serial = v_sync;
- SERIALIZE_SCALAR(v_sync_serial);
- const uint32_t v_back_porch_serial = v_back_porch;
- SERIALIZE_SCALAR(v_back_porch_serial);
- const uint32_t v_data_serial = v_data;
- SERIALIZE_SCALAR(v_data_serial);
- const uint32_t v_front_porch_serial = v_front_porch;
- SERIALIZE_SCALAR(v_front_porch_serial);
- const uint32_t h_sync_serial = h_sync;
- SERIALIZE_SCALAR(h_sync_serial);
- const uint32_t h_back_porch_serial = h_back_porch;
- SERIALIZE_SCALAR(h_back_porch_serial);
- const uint32_t h_data_serial = h_data;
- SERIALIZE_SCALAR(h_data_serial);
- const uint32_t h_front_porch_serial = h_front_porch;
- SERIALIZE_SCALAR(h_front_porch_serial);
- const uint32_t polarities_serial = polarities;
- SERIALIZE_SCALAR(polarities_serial);
- const uint32_t command_serial = command;
- SERIALIZE_SCALAR(command_serial);
- const uint32_t pixel_format_serial = pixel_format;
- SERIALIZE_SCALAR(pixel_format_serial);
- const uint32_t red_select_serial = red_select;
- SERIALIZE_SCALAR(red_select_serial);
- const uint32_t green_select_serial = green_select;
- SERIALIZE_SCALAR(green_select_serial);
- const uint32_t blue_select_serial = blue_select;
- SERIALIZE_SCALAR(blue_select_serial);
-
- SERIALIZE_SCALAR(frameReadStartTime);
- SERIALIZE_SCALAR(dmaStartAddr);
- SERIALIZE_SCALAR(dmaCurAddr);
- SERIALIZE_SCALAR(dmaMaxAddr);
- SERIALIZE_SCALAR(dmaPendingNum);
- SERIALIZE_SCALAR(frameUnderrun);
-
- arrayParamOut(cp, "virtualDisplayBuffer", virtualDisplayBuffer);
-
- SERIALIZE_SCALAR(pixelBufferSize);
- SERIALIZE_SCALAR(pixelIndex);
- SERIALIZE_SCALAR(doUpdateParams);
- SERIALIZE_SCALAR(frameUnderway);
- SERIALIZE_SCALAR(dmaBytesInFlight);
-
- Tick start_event_time = 0;
- Tick end_event_time = 0;
- Tick render_pixel_event_time = 0;
- Tick fill_pixel_buffer_event_time = 0;
- Tick int_event_time = 0;
- if (startFrameEvent.scheduled())
- start_event_time = startFrameEvent.when();
- if (endFrameEvent.scheduled())
- end_event_time = endFrameEvent.when();
- if (renderPixelEvent.scheduled())
- render_pixel_event_time = renderPixelEvent.when();
- if (fillPixelBufferEvent.scheduled())
- fill_pixel_buffer_event_time = fillPixelBufferEvent.when();
- if (intEvent.scheduled())
- int_event_time = intEvent.when();
- SERIALIZE_SCALAR(start_event_time);
- SERIALIZE_SCALAR(end_event_time);
- SERIALIZE_SCALAR(render_pixel_event_time);
- SERIALIZE_SCALAR(fill_pixel_buffer_event_time);
- SERIALIZE_SCALAR(int_event_time);
-
- vector<Tick> dma_done_event_tick(MAX_OUTSTANDING_DMA_REQ_CAPACITY);
- vector<size_t> dma_done_event_burst_len(MAX_OUTSTANDING_DMA_REQ_CAPACITY);
- for (int x = 0; x < MAX_OUTSTANDING_DMA_REQ_CAPACITY; ++x) {
- dma_done_event_tick[x] = dmaDoneEventAll[x].scheduled() ?
- dmaDoneEventAll[x].when() : 0;
- dma_done_event_burst_len[x] = dmaDoneEventAll[x].scheduled() ?
- dmaDoneEventAll[x].getTransactionSize() : 0;
- }
- arrayParamOut(cp, "dma_done_event_tick", dma_done_event_tick);
- arrayParamOut(cp, "dma_done_event_burst_length", dma_done_event_burst_len);
+ UNSERIALIZE_SCALAR(nextLineAddr);
+ UNSERIALIZE_SCALAR(frameEnd);
}
void
-HDLcd::unserialize(CheckpointIn &cp)
+HDLcd::DmaEngine::startFrame(Addr fb_base)
{
- uint32_t version_serial, int_rawstat_serial, int_clear_serial,
- int_mask_serial, int_status_serial, fb_line_count_serial,
- bus_options_serial, v_sync_serial, v_back_porch_serial,
- v_data_serial, v_front_porch_serial, h_sync_serial,
- h_back_porch_serial, h_data_serial, h_front_porch_serial,
- polarities_serial, command_serial, pixel_format_serial,
- red_select_serial, green_select_serial, blue_select_serial;
-
- DPRINTF(HDLcd, "Unserializing ARM HDLCD\n");
-
- UNSERIALIZE_SCALAR(version_serial);
- version = version_serial;
- UNSERIALIZE_SCALAR(int_rawstat_serial);
- int_rawstat = int_rawstat_serial;
- UNSERIALIZE_SCALAR(int_clear_serial);
- int_clear = int_clear_serial;
- UNSERIALIZE_SCALAR(int_mask_serial);
- int_mask = int_mask_serial;
- UNSERIALIZE_SCALAR(int_status_serial);
- int_status = int_status_serial;
+ nextLineAddr = fb_base;
+ frameEnd = fb_base + numLines * linePitch;
- UNSERIALIZE_SCALAR(fb_base);
- UNSERIALIZE_SCALAR(fb_line_length);
+ startFill(nextLineAddr, lineSize);
+}
- UNSERIALIZE_SCALAR(fb_line_count_serial);
- fb_line_count = fb_line_count_serial;
+void
+HDLcd::DmaEngine::abortFrame()
+{
+ nextLineAddr = frameEnd;
+ stopFill();
+ flush();
+}
- UNSERIALIZE_SCALAR(fb_line_pitch);
- UNSERIALIZE_SCALAR(bus_options_serial);
- bus_options = bus_options_serial;
- UNSERIALIZE_SCALAR(v_sync_serial);
- v_sync = v_sync_serial;
- UNSERIALIZE_SCALAR(v_back_porch_serial);
- v_back_porch = v_back_porch_serial;
- UNSERIALIZE_SCALAR(v_data_serial);
- v_data = v_data_serial;
- UNSERIALIZE_SCALAR(v_front_porch_serial);
- v_front_porch = v_front_porch_serial;
- UNSERIALIZE_SCALAR(h_sync_serial);
- h_sync = h_sync_serial;
- UNSERIALIZE_SCALAR(h_back_porch_serial);
- h_back_porch = h_back_porch_serial;
- UNSERIALIZE_SCALAR(h_data_serial);
- h_data = h_data_serial;
- UNSERIALIZE_SCALAR(h_front_porch_serial);
- h_front_porch = h_front_porch_serial;
- UNSERIALIZE_SCALAR(polarities_serial);
- polarities = polarities_serial;
- UNSERIALIZE_SCALAR(command_serial);
- command = command_serial;
- UNSERIALIZE_SCALAR(pixel_format_serial);
- pixel_format = pixel_format_serial;
- UNSERIALIZE_SCALAR(red_select_serial);
- red_select = red_select_serial;
- UNSERIALIZE_SCALAR(green_select_serial);
- green_select = green_select_serial;
- UNSERIALIZE_SCALAR(blue_select_serial);
- blue_select = blue_select_serial;
-
- UNSERIALIZE_SCALAR(frameReadStartTime);
- UNSERIALIZE_SCALAR(dmaStartAddr);
- UNSERIALIZE_SCALAR(dmaCurAddr);
- UNSERIALIZE_SCALAR(dmaMaxAddr);
- UNSERIALIZE_SCALAR(dmaPendingNum);
- UNSERIALIZE_SCALAR(frameUnderrun);
- UNSERIALIZE_SCALAR(dmaBytesInFlight);
-
- arrayParamIn(cp, "virtualDisplayBuffer", virtualDisplayBuffer);
-
- UNSERIALIZE_SCALAR(pixelBufferSize);
- UNSERIALIZE_SCALAR(pixelIndex);
- UNSERIALIZE_SCALAR(doUpdateParams);
- UNSERIALIZE_SCALAR(frameUnderway);
-
- Tick start_event_time = 0;
- Tick end_event_time = 0;
- Tick render_pixel_event_time = 0;
- Tick fill_pixel_buffer_event_time = 0;
- Tick int_event_time = 0;
- UNSERIALIZE_SCALAR(start_event_time);
- UNSERIALIZE_SCALAR(end_event_time);
- UNSERIALIZE_SCALAR(render_pixel_event_time);
- UNSERIALIZE_SCALAR(fill_pixel_buffer_event_time);
- UNSERIALIZE_SCALAR(int_event_time);
- if (start_event_time)
- schedule(startFrameEvent, start_event_time);
- if (end_event_time)
- schedule(endFrameEvent, end_event_time);
- if (render_pixel_event_time)
- schedule(renderPixelEvent, render_pixel_event_time);
- if (fill_pixel_buffer_event_time)
- schedule(fillPixelBufferEvent, fill_pixel_buffer_event_time);
- if (int_event_time)
- schedule(intEvent, int_event_time);
-
- vector<Tick> dma_done_event_tick(MAX_OUTSTANDING_DMA_REQ_CAPACITY);
- vector<Tick> dma_done_event_burst_len(MAX_OUTSTANDING_DMA_REQ_CAPACITY);
- arrayParamIn(cp, "dma_done_event_tick", dma_done_event_tick);
- arrayParamIn(cp, "dma_done_event_burst_length", dma_done_event_burst_len);
- dmaDoneEventFree.clear();
- for (int x = 0; x < MAX_OUTSTANDING_DMA_REQ_CAPACITY; ++x) {
- if (dma_done_event_tick[x]) {
- dmaDoneEventAll[x].setTransactionSize(dma_done_event_burst_len[x]);
- schedule(dmaDoneEventAll[x], dma_done_event_tick[x]);
- } else
- dmaDoneEventFree.push_back(&dmaDoneEventAll[x]);
- }
- assert(MAX_OUTSTANDING_DMA_REQ_CAPACITY - dmaDoneEventFree.size() == dmaPendingNum);
-
- if (frameUnderway) {
- updateVideoParams(true);
- fb.resize(width(), height());
- fb.copyIn(virtualDisplayBuffer, pixelConverter());
- if (vnc)
- vnc->setDirty();
- }
+void
+HDLcd::DmaEngine::dumpSettings()
+{
+ inform("DMA line size: %u bytes", lineSize);
+ inform("DMA line pitch: %i bytes", linePitch);
+ inform("DMA num lines: %u", numLines);
}
void
-HDLcd::generateInterrupt()
+HDLcd::DmaEngine::onEndOfBlock()
{
- int_status = int_rawstat & int_mask;
- DPRINTF(HDLcd, "Generate Interrupt: int_rawstat=0x%08x int_mask=0x%08x "
- "int_status=0x%08x\n",
- (uint32_t)int_rawstat, (uint32_t)int_mask, (uint32_t)int_status);
+ if (nextLineAddr == frameEnd)
+ // We're done with this frame. Ignore calls to this method
+ // until the next frame has been started.
+ return;
- if (int_status != 0) {
- gic->sendInt(intNum);
- DPRINTF(HDLcd, " -- Generated\n");
- }
+ nextLineAddr += linePitch;
+ if (nextLineAddr != frameEnd)
+ startFill(nextLineAddr, lineSize);
}
-AddrRangeList
-HDLcd::getAddrRanges() const
+void
+HDLcd::DmaEngine::onIdle()
{
- AddrRangeList ranges;
- ranges.push_back(RangeSize(pioAddr, pioSize));
- return ranges;
+ parent.intRaise(INT_DMA_END);
}
+void
+HDLcd::PixelPump::dumpSettings()
+{
+ const DisplayTimings &t(timings());
+
+ inform("PixelPump width: %u", t.width);
+ inform("PixelPump height: %u", t.height);
+
+ inform("PixelPump horizontal back porch: %u", t.hBackPorch);
+ inform("PixelPump horizontal fron porch: %u", t.hFrontPorch);
+ inform("PixelPump horizontal fron porch: %u", t.hSync);
+
+ inform("PixelPump vertical back porch: %u", t.vBackPorch);
+ inform("PixelPump vertical fron porch: %u", t.vFrontPorch);
+ inform("PixelPump vertical fron porch: %u", t.vSync);
+}
+
+
HDLcd *
HDLcdParams::create()
{
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Chris Emmons
+ * Andreas Sandberg
*/
* content of an underrun frame.
*
* KNOWN ISSUES
- * 1. The default kernel driver used in testing sets the line count to one
- * less than the expected 768. However, it also sets the v_count to 767.
- * The controller specifies that 1 should be added to v_count but does not
- * specify adding 1 to the line count. The driver is probably wrong.
- * However, to sync these two numbers up, this model uses fb_line_count and
- * fb_line_length rather than using v_data or h_data values to determine the
- * width and height of the frame; those values are ignored.
- * 2. The HDLcd is implemented here as an AmbaDmaDevice, but it doesn't have
- * an AMBA ID as far as I know. That is the only bit of the AmbaDmaDevice
- * interface that is irrelevant to it, so a fake AMBA ID is used for now.
- * I didn't think inserting an extra layer of hierachy between AmbaDmaDevice
- * and DmaDevice would be helpful to anyone else, but that may be the right
- * answer.
- * 3. The internal buffer size is either 1 or 2 KB depending on which
- * specification is referenced for the different Versatile Express tiles.
- * This implementation uses the larger 2 KB buffer by default.
+ * <ul>
+ * <li>The HDLcd is implemented here as an AmbaDmaDevice, but it
+ * doesn't have an AMBA ID as far as I know. That is the only
+ * bit of the AmbaDmaDevice interface that is irrelevant to it,
+ * so a fake AMBA ID is used for now. I didn't think inserting
+ * an extra layer of hierachy between AmbaDmaDevice and
+ * DmaDevice would be helpful to anyone else, but that may be
+ * the right answer.
+ * </ul>
*/
#ifndef __DEV_ARM_HDLCD_HH__
#include "base/bitmap.hh"
#include "base/framebuffer.hh"
#include "dev/arm/amba_device.hh"
-#include "params/HDLcd.hh"
+#include "dev/pixelpump.hh"
#include "sim/serialize.hh"
class VncInput;
+struct HDLcdParams;
+class HDLcdPixelPump;
class HDLcd: public AmbaDmaDevice
{
- protected:
- /** fake AMBA ID -- unused */
- static const uint64_t AMBA_ID = ULL(0xb105f00d00141000);
+ public:
+ HDLcd(const HDLcdParams *p);
+ ~HDLcd();
+
+ void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
+ void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
+
+ void drainResume() M5_ATTR_OVERRIDE;
+ public: // IO device interface
+ Tick read(PacketPtr pkt) M5_ATTR_OVERRIDE;
+ Tick write(PacketPtr pkt) M5_ATTR_OVERRIDE;
+
+ AddrRangeList getAddrRanges() const M5_ATTR_OVERRIDE { return addrRanges; }
+
+ protected: // Parameters
+ VncInput *vnc;
+ const bool workaroundSwapRB;
+ const bool workaroundDmaLineCount;
+ const AddrRangeList addrRanges;
+ const bool enableCapture;
+ const Addr pixelBufferSize;
+
+ protected: // Register handling
/** ARM HDLcd register offsets */
enum RegisterOffset {
Version = 0x0000,
Pixel_Format = 0x0240,
Red_Select = 0x0244,
Green_Select = 0x0248,
- Blue_Select = 0x024C };
+ Blue_Select = 0x024C,
+ };
/** Reset value for Bus_Options register */
- static const size_t BUS_OPTIONS_RESETV = 0x408;
+ static constexpr size_t BUS_OPTIONS_RESETV = 0x408;
/** Reset value for Version register */
- static const size_t VERSION_RESETV = 0x1CDC0000;
+ static constexpr size_t VERSION_RESETV = 0x1CDC0000;
- /** max number of outstanding DMA requests possible */
- static const size_t MAX_OUTSTANDING_DMA_REQ_CAPACITY = 16;
+ /** AXI port width in bytes */
+ static constexpr size_t AXI_PORT_WIDTH = 8;
/** max number of beats delivered in one dma burst */
- static const size_t MAX_BURST_LEN = 16;
+ static constexpr size_t MAX_BURST_LEN = 16;
- /** size of internal buffer in bytes */
- static const size_t PIXEL_BUFFER_CAPACITY = 2048;
-
- /** AXI port width in bytes */
- static const size_t AXI_PORT_WIDTH = 8;
-
- static const size_t MAX_BURST_SIZE = MAX_BURST_LEN * AXI_PORT_WIDTH;
+ /** Maximum number of bytes per pixel */
+ static constexpr size_t MAX_PIXEL_SIZE = 4;
/**
* @name RegisterFieldLayouts
Bitfield<31,16> product_id;
EndBitUnion(VersionReg)
- BitUnion32(InterruptReg)
- Bitfield<0> dma_end;
- Bitfield<1> bus_error;
- Bitfield<2> vsync;
- Bitfield<3> underrun;
- EndBitUnion(InterruptReg)
+ static constexpr uint32_t INT_DMA_END = (1UL << 0);
+ static constexpr uint32_t INT_BUS_ERROR = (1UL << 1);
+ static constexpr uint32_t INT_VSYNC = (1UL << 2);
+ static constexpr uint32_t INT_UNDERRUN = (1UL << 3);
BitUnion32(FbLineCountReg)
Bitfield<11,0> fb_line_count;
* HDLCD register contents.
*/
/**@{*/
- VersionReg version; /**< Version register */
- InterruptReg int_rawstat; /**< Interrupt raw status register */
- InterruptReg int_clear; /**< Interrupt clear register */
- InterruptReg int_mask; /**< Interrupt mask register */
- InterruptReg int_status; /**< Interrupt status register */
+ const VersionReg version; /**< Version register */
+ uint32_t int_rawstat; /**< Interrupt raw status register */
+ uint32_t int_mask; /**< Interrupt mask register */
uint32_t fb_base; /**< Frame buffer base address register */
uint32_t fb_line_length; /**< Frame buffer Line length register */
FbLineCountReg fb_line_count; /**< Frame buffer Line count register */
- uint32_t fb_line_pitch; /**< Frame buffer Line pitch register */
+ int32_t fb_line_pitch; /**< Frame buffer Line pitch register */
BusOptsReg bus_options; /**< Bus options register */
TimingReg v_sync; /**< Vertical sync width register */
TimingReg v_back_porch; /**< Vertical back porch width register */
ColorSelectReg blue_select; /**< Blue color select register */
/** @} */
- /** Pixel clock period */
- const Tick pixelClock;
-
- FrameBuffer fb;
-
- /** VNC server */
- VncInput *vnc;
-
- /** Helper to write out bitmaps */
- Bitmap bmp;
-
- /** Picture of what the current frame buffer looks like */
- std::ostream *pic;
-
- /**
- * Event wrapper for dmaDone()
- *
- * This event call pushes its this pointer onto the freeDoneEvent vector
- * and calls dmaDone() when triggered. While most of the time the burst
- * length of a transaction will be the max burst length set by the driver,
- * any trailing bytes must be handled with smaller lengths thus requiring
- * the configurable burst length option.
- */
- class DmaDoneEvent : public Event
- {
- private:
- /** Reference to HDLCD that issued the corresponding DMA transaction */
- HDLcd &obj;
-
- /** Transaction size */
- size_t transSize;
-
- public:
- /**
- * Constructor.
- *
- * @param _obj HDLCD that issued the corresponding DMA transaction
- */
- DmaDoneEvent(HDLcd *_obj)
- : Event(), obj(*_obj), transSize(0) {}
-
- /**
- * Sets the size of this transaction.
- *
- * @param len size of the transaction in bytes
- */
- void setTransactionSize(size_t len) {
- transSize = len;
- }
-
- /**
- * Gets the size of this transaction.
- *
- * @return size of this transaction in bytes
- */
- size_t getTransactionSize() const {
- return transSize;
- }
-
- void process() {
- obj.dmaDone(this);
- }
-
- const std::string name() const {
- return obj.name() + ".DmaDoneEvent";
- }
- };
-
- /** Start time for frame buffer dma read */
- Tick frameReadStartTime;
-
- /** Starting address for the current frame */
- Addr dmaStartAddr;
-
- /** Next address the dma should read from */
- Addr dmaCurAddr;
-
- /** One byte past the address of the last byte the dma should read
- * from */
- Addr dmaMaxAddr;
-
- /** Number of pending dma reads */
- size_t dmaPendingNum;
-
- /** Flag indicating whether current frame has underrun */
- bool frameUnderrun;
-
- /** HDLcd virtual display buffer */
- std::vector<uint8_t> virtualDisplayBuffer;
-
- /** Size of the pixel buffer */
- size_t pixelBufferSize;
+ uint32_t readReg(Addr offset);
+ void writeReg(Addr offset, uint32_t value);
- /** Index of the next pixel to render */
- size_t pixelIndex;
-
- /** Flag indicating whether video parameters need updating */
- bool doUpdateParams;
+ PixelConverter pixelConverter() const;
+ DisplayTimings displayTimings() const;
- /** Flag indicating whether a frame read / display is in progress */
- bool frameUnderway;
+ void createDmaEngine();
- /**
- * Number of bytes in flight from DMA that have not reached the pixel
- * buffer yet
- */
- uint32_t dmaBytesInFlight;
+ void cmdEnable();
+ void cmdDisable();
- /**
- * Gets the number of oustanding DMA transactions allowed on the bus at a
- * time.
- *
- * @return gets the driver-specified number of outstanding DMA transactions
- * from the hdlcd controller that are allowed on the bus at a time
- */
- inline uint16_t maxOutstandingDma() const {
- return bus_options.max_outstanding;
- }
+ bool enabled() const { return command.enable; }
- /**
- * Gets the number of bytes free in the pixel buffer.
- *
- * @return number of bytes free in the internal pixel buffer
- */
- inline uint32_t bytesFreeInPixelBuffer() const {
- return PIXEL_BUFFER_CAPACITY - (pixelBufferSize + dmaBytesInFlight);
- }
+ public: // Pixel pump callbacks
+ bool pxlNext(Pixel &p);
+ void pxlVSyncBegin();
+ void pxlVSyncEnd();
+ void pxlUnderrun();
+ void pxlFrameDone();
+ protected: // Interrupt handling
/**
- * Gets the number of beats-per-burst for bus transactions.
+ * Assign new interrupt values and update interrupt signals
*
- * @return number of beats-per-burst per HDLcd DMA transaction
- */
- inline size_t dmaBurstLength() const {
- assert(bus_options.burst_len <= MAX_BURST_LEN);
- return bus_options.burst_len;
- }
-
- /**
- * Gets the number of bytes per pixel.
+ * A new interrupt is scheduled signalled if the set of unmasked
+ * interrupts goes empty to non-empty. Conversely, if the set of
+ * unmasked interrupts goes from non-empty to empty, the interrupt
+ * signal is cleared.
*
- * @return bytes per pixel
+ * @param ints New <i>raw</i> interrupt status
+ * @param mask New interrupt mask
*/
- inline size_t bytesPerPixel() const {
- return pixel_format.bytes_per_pixel + 1;
- }
+ void setInterrupts(uint32_t ints, uint32_t mask);
/**
- * Gets frame buffer width.
+ * Convenience function to update the interrupt mask
*
- * @return frame buffer width (pixels per line)
+ * @see setInterrupts
+ * @param mask New interrupt mask
*/
- inline size_t width() const {
- return fb_line_length / bytesPerPixel();
- }
+ void intMask(uint32_t mask) { setInterrupts(int_rawstat, mask); }
/**
- * Gets frame buffer height.
+ * Convenience function to raise a new interrupt
*
- * @return frame buffer height (lines per panel)
+ * @see setInterrupts
+ * @param ints Set of interrupts to raise
*/
- inline size_t height() const {
- return fb_line_count.fb_line_count;
+ void intRaise(uint32_t ints) {
+ setInterrupts(int_rawstat | ints, int_mask);
}
- inline size_t area() const { return height() * width(); }
-
/**
- * Gets the total number of pixel clocks per display line.
+ * Convenience function to clear interrupts
*
- * @return number of pixel clocks per display line including porch delays
- * and horizontal sync time
+ * @see setInterrupts
+ * @param ints Set of interrupts to clear
*/
- inline uint64_t PClksPerLine() const {
- return h_back_porch.val + 1 +
- h_data.val + 1 +
- h_front_porch.val + 1 +
- h_sync.val + 1;
+ void intClear(uint32_t ints) {
+ setInterrupts(int_rawstat & ~ints, int_mask);
}
- /** Send updated parameters to the vnc server */
- void updateVideoParams(bool unserializing);
-
- /** Generates an interrupt */
- void generateInterrupt();
-
- /** Start reading the next frame */
- void startFrame();
+ /** Masked interrupt status register */
+ const uint32_t intStatus() const { return int_rawstat & int_mask; }
- /** End of frame reached */
- void endFrame();
-
- /** Generate DMA read requests from frame buffer into pixel buffer */
- void fillPixelBuffer();
+ protected: // Pixel output
+ class PixelPump : public BasePixelPump
+ {
+ public:
+ PixelPump(HDLcd &p, ClockDomain &pxl_clk, unsigned pixel_chunk)
+ : BasePixelPump(p, pxl_clk, pixel_chunk), parent(p) {}
- /** DMA done event */
- void dmaDone(DmaDoneEvent *event);
+ void dumpSettings();
- /** Called when it is time to render a pixel */
- void renderPixel();
+ protected:
+ bool nextPixel(Pixel &p) M5_ATTR_OVERRIDE { return parent.pxlNext(p); }
- PixelConverter pixelConverter() const;
+ void onVSyncBegin() M5_ATTR_OVERRIDE { return parent.pxlVSyncBegin(); }
+ void onVSyncEnd() M5_ATTR_OVERRIDE { return parent.pxlVSyncEnd(); }
- /** Start of frame event */
- EventWrapper<HDLcd, &HDLcd::startFrame> startFrameEvent;
+ void onUnderrun(unsigned x, unsigned y) M5_ATTR_OVERRIDE {
+ parent.pxlUnderrun();
+ }
- /** End of frame event */
- EventWrapper<HDLcd, &HDLcd::endFrame> endFrameEvent;
+ void onFrameDone() M5_ATTR_OVERRIDE { parent.pxlFrameDone(); }
- /** Pixel render event */
- EventWrapper<HDLcd, &HDLcd::renderPixel> renderPixelEvent;
+ protected:
+ HDLcd &parent;
+ };
- /** Fill fifo */
- EventWrapper<HDLcd, &HDLcd::fillPixelBuffer> fillPixelBufferEvent;
+ /** Helper to write out bitmaps */
+ Bitmap bmp;
- /** Wrapper to create an event out of the interrupt */
- EventWrapper<HDLcd, &HDLcd::generateInterrupt> intEvent;
+ /** Picture of what the current frame buffer looks like */
+ std::ostream *pic;
- /**@{*/
- /**
- * All pre-allocated DMA done events
- *
- * The HDLCD model preallocates maxOutstandingDma() number of
- * DmaDoneEvents to avoid having to heap allocate every single
- * event when it is needed. In order to keep track of which events
- * are in flight and which are ready to be used, we use two
- * different vectors. dmaDoneEventAll contains <i>all</i>
- * DmaDoneEvents that the object may use, while dmaDoneEventFree
- * contains a list of currently <i>unused</i> events. When an
- * event needs to be scheduled, the last element of the
- * dmaDoneEventFree is used and removed from the list. When an
- * event fires, it is added to the end of the
- * dmaEventFreeList. dmaDoneEventAll is never used except for in
- * initialization and serialization.
- */
- std::vector<DmaDoneEvent> dmaDoneEventAll;
+ /** Cached pixel converter, set when the converter is enabled. */
+ PixelConverter conv;
- /** Unused DMA done events that are ready to be scheduled */
- std::vector<DmaDoneEvent *> dmaDoneEventFree;
- /**@}*/
+ PixelPump pixelPump;
- bool enableCapture;
+ protected: // DMA handling
+ class DmaEngine : public DmaReadFifo
+ {
+ public:
+ DmaEngine(HDLcd &_parent, size_t size,
+ unsigned request_size, unsigned max_pending,
+ size_t line_size, ssize_t line_pitch, unsigned num_lines);
- const bool workaround_swap_rb;
+ void startFrame(Addr fb_base);
+ void abortFrame();
+ void dumpSettings();
- public:
- typedef HDLcdParams Params;
+ void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
+ void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
- const Params *
- params() const
- {
- return dynamic_cast<const Params *>(_params);
- }
- HDLcd(const Params *p);
- ~HDLcd();
+ protected:
+ void onEndOfBlock() M5_ATTR_OVERRIDE;
+ void onIdle() M5_ATTR_OVERRIDE;
- virtual Tick read(PacketPtr pkt);
- virtual Tick write(PacketPtr pkt);
+ HDLcd &parent;
+ const size_t lineSize;
+ const ssize_t linePitch;
+ const unsigned numLines;
- void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
- void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
+ Addr nextLineAddr;
+ Addr frameEnd;
+ };
- /**
- * Determine the address ranges that this device responds to.
- *
- * @return a list of non-overlapping address ranges
- */
- AddrRangeList getAddrRanges() const;
+ std::unique_ptr<DmaEngine> dmaEngine;
};
#endif
projects / gem5.git / commitdiff