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author | Gabe Black <gblack@eecs.umich.edu> | 2009-01-25 20:35:00 -0800 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2009-01-25 20:35:00 -0800 |
commit | 56e182a6a9e58b951712582c4c63cf303847156e (patch) | |
tree | 0431ff1519392b7febc83bf4e94e41c6cb1ca7df /src/dev/x86/i8237.hh | |
parent | 151bc018dd621b62b60ee5eca10c7531de6eb441 (diff) | |
download | gem5-56e182a6a9e58b951712582c4c63cf303847156e.tar.xz |
X86: Add a dummy minimal DMA controller that doesn't do anything.
Diffstat (limited to 'src/dev/x86/i8237.hh')
-rw-r--r-- | src/dev/x86/i8237.hh | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/dev/x86/i8237.hh b/src/dev/x86/i8237.hh new file mode 100644 index 000000000..2d73b8ab5 --- /dev/null +++ b/src/dev/x86/i8237.hh @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2008 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. + * + * Authors: Gabe Black + */ + +#ifndef __DEV_X86_I8237_HH__ +#define __DEV_X86_I8237_HH__ + +#include "dev/io_device.hh" +#include "params/I8237.hh" + +namespace X86ISA +{ + +class I8237 : public BasicPioDevice +{ + protected: + Tick latency; + uint8_t maskReg; + + public: + typedef I8237Params Params; + + const Params * + params() const + { + return dynamic_cast<const Params *>(_params); + } + + I8237(Params *p) : BasicPioDevice(p), latency(p->pio_latency), maskReg(0) + { + pioSize = 16; + } + Tick read(PacketPtr pkt); + + Tick write(PacketPtr pkt); +}; + +}; // namespace X86ISA + +#endif //__DEV_X86_I8237_HH__ |