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author | Gabe Black <gblack@eecs.umich.edu> | 2008-10-11 02:16:11 -0700 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2008-10-11 02:16:11 -0700 |
commit | bc2217eefc8db831b72dfdcae7ecc9bd95a31c3c (patch) | |
tree | c4ef2e5783840b9dd8b2e76c19daaf77a2b90a8a /src/dev/x86/i8254.cc | |
parent | a6600fdd8885f9765c859935a5c97d9017653745 (diff) | |
download | gem5-bc2217eefc8db831b72dfdcae7ecc9bd95a31c3c.tar.xz |
X86: Change I8254 and PCSpeaker devices from subdevices to SimObjects and eliminate subdevices.
--HG--
rename : src/dev/x86/south_bridge/i8254.cc => src/dev/x86/i8254.cc
rename : src/dev/x86/south_bridge/i8254.hh => src/dev/x86/i8254.hh
rename : src/dev/x86/south_bridge/speaker.cc => src/dev/x86/speaker.cc
rename : src/dev/x86/south_bridge/speaker.hh => src/dev/x86/speaker.hh
Diffstat (limited to 'src/dev/x86/i8254.cc')
-rw-r--r-- | src/dev/x86/i8254.cc | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/dev/x86/i8254.cc b/src/dev/x86/i8254.cc new file mode 100644 index 000000000..cc7c48980 --- /dev/null +++ b/src/dev/x86/i8254.cc @@ -0,0 +1,69 @@ +/* + * 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 + */ + +#include "dev/x86/i8254.hh" +#include "mem/packet.hh" +#include "mem/packet_access.hh" + +Tick +X86ISA::I8254::read(PacketPtr pkt) +{ + assert(pkt->getSize() == 1); + Addr offset = pkt->getAddr() - pioAddr; + if (offset < 3) { + pkt->set(pit.readCounter(offset)); + } else if (offset == 3) { + pkt->set(uint8_t(-1)); + } else { + panic("Read from undefined i8254 register.\n"); + } + return latency; +} + +Tick +X86ISA::I8254::write(PacketPtr pkt) +{ + assert(pkt->getSize() == 1); + Addr offset = pkt->getAddr() - pioAddr; + if (offset < 3) { + pit.writeCounter(offset, pkt->get<uint8_t>()); + } else if (offset == 3) { + pit.writeControl(pkt->get<uint8_t>()); + } else { + panic("Write to undefined i8254 register.\n"); + } + return latency; +} + +X86ISA::I8254 * +I8254Params::create() +{ + return new X86ISA::I8254(this); +} |