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Diffstat (limited to 'src/dev/uart.hh')
-rw-r--r-- | src/dev/uart.hh | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/dev/uart.hh b/src/dev/uart.hh new file mode 100644 index 000000000..2dd15d9b8 --- /dev/null +++ b/src/dev/uart.hh @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2004-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** @file + * Base class for UART + */ + +#ifndef __UART_HH__ +#define __UART_HH__ + +#include "base/range.hh" +#include "dev/io_device.hh" + +class SimConsole; +class Platform; + +const int RX_INT = 0x1; +const int TX_INT = 0x2; + + +class Uart : public BasicPioDevice +{ + + protected: + int status; + Platform *platform; + SimConsole *cons; + + public: + struct Params : public BasicPioDevice::Params + { + SimConsole *cons; + }; + + Uart(Params *p); + + /** + * Inform the uart that there is data available. + */ + virtual void dataAvailable() = 0; + + + /** + * Return if we have an interrupt pending + * @return interrupt status + */ + bool intStatus() { return status ? true : false; } + + protected: + const Params *params() const {return (const Params *)_params; } + +}; + +#endif // __UART_HH__ |