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| author | Ali Saidi <saidi@eecs.umich.edu> | 2007-04-30 13:13:03 -0400 |
|---|---|---|
| committer | Ali Saidi <saidi@eecs.umich.edu> | 2007-04-30 13:13:03 -0400 |
| commit | 58b9047194774ae6ee3cd7c2ef52cc867c8e718e (patch) | |
| tree | 6f13959d6eb0edaabb63bc6b0b74f77f8a65f993 /src/dev/uart8250.cc | |
| parent | ae4208f3a32bc829283a9998aa6f6fcebea7ca77 (diff) | |
| download | gem5-58b9047194774ae6ee3cd7c2ef52cc867c8e718e.tar.xz | |
fix console printing bug
--HG--
extra : convert_revision : 5481b72b22e7a2cf3367d777309bc30201f3b1fc
Diffstat (limited to 'src/dev/uart8250.cc')
| -rw-r--r-- | src/dev/uart8250.cc | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/dev/uart8250.cc b/src/dev/uart8250.cc index ddee33695..d178bd1af 100644 --- a/src/dev/uart8250.cc +++ b/src/dev/uart8250.cc @@ -68,6 +68,7 @@ Uart8250::IntrEvent::process() DPRINTF(Uart, "UART InterEvent, interrupting\n"); uart->platform->postConsoleInt(); uart->status |= intrBit; + uart->lastTxInt = curTick; } else DPRINTF(Uart, "UART InterEvent, not interrupting\n"); @@ -153,13 +154,13 @@ Uart8250::read(PacketPtr pkt) if (status & RX_INT) /* Rx data interrupt has a higher priority */ pkt->set(IIR_RXID); - else if (status & TX_INT) + else if (status & TX_INT) { pkt->set(IIR_TXID); - else + //Tx interrupts are cleared on IIR reads + status &= ~TX_INT; + } else pkt->set(IIR_NOPEND); - //Tx interrupts are cleared on IIR reads - status &= ~TX_INT; break; case 0x3: // Line Control Register (LCR) pkt->set(LCR); @@ -222,7 +223,16 @@ Uart8250::write(PacketPtr pkt) if (UART_IER_THRI & IER) { DPRINTF(Uart, "IER: IER_THRI set, scheduling TX intrrupt\n"); - txIntrEvent.scheduleIntr(); + if (curTick - lastTxInt > + (Tick)((Clock::Float::s / 2e9) * 450)) { + DPRINTF(Uart, "-- Interrupting Immediately... %d,%d\n", + curTick, lastTxInt); + txIntrEvent.process(); + } else { + DPRINTF(Uart, "-- Delaying interrupt... %d,%d\n", + curTick, lastTxInt); + txIntrEvent.scheduleIntr(); + } } else { |