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Diffstat (limited to 'src/dev/arm/kmi.cc')
| -rw-r--r-- | src/dev/arm/kmi.cc | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/dev/arm/kmi.cc b/src/dev/arm/kmi.cc new file mode 100644 index 000000000..6cd61fd09 --- /dev/null +++ b/src/dev/arm/kmi.cc @@ -0,0 +1,189 @@ +/* + * Copyright (c) 2010 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Copyright (c) 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. + * + * Authors: William Wang + */ + +#include "base/trace.hh" +#include "dev/arm/amba_device.hh" +#include "dev/arm/kmi.hh" +#include "mem/packet.hh" +#include "mem/packet_access.hh" + +Pl050::Pl050(const Params *p) + : AmbaDevice(p), control(0x00), status(0x43), kmidata(0x00), clkdiv(0x00), + intreg(0x00), intNum(p->int_num), gic(p->gic), intDelay(p->int_delay), + intEvent(this) +{ + pioSize = 0xfff; +} + +Tick +Pl050::read(PacketPtr pkt) +{ + assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); + + Addr daddr = pkt->getAddr() - pioAddr; + pkt->allocate(); + + DPRINTF(Pl050, " read register %#x size=%d\n", daddr, pkt->getSize()); + + // use a temporary data since the KMI registers are read/written with + // different size operations + // + uint32_t data = 0; + + switch (daddr) { + case kmiCr: + data = control; + break; + case kmiStat: + data = status; + break; + case kmiData: + data = kmidata; + break; + case kmiClkDiv: + data = clkdiv; + break; + case kmiISR: + data = intreg; + break; + default: + if (AmbaDev::readId(pkt, ambaId, pioAddr)) { + // Hack for variable size accesses + data = pkt->get<uint32_t>(); + break; + } + + warn("Tried to read PL050 at offset %#x that doesn't exist\n", daddr); + break; + } + + switch(pkt->getSize()) { + case 1: + pkt->set<uint8_t>(data); + break; + case 2: + pkt->set<uint16_t>(data); + break; + case 4: + pkt->set<uint32_t>(data); + break; + default: + panic("KMI read size too big?\n"); + break; + } + + pkt->makeAtomicResponse(); + return pioDelay; +} + +Tick +Pl050::write(PacketPtr pkt) +{ + + assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); + + Addr daddr = pkt->getAddr() - pioAddr; + + DPRINTF(Pl050, " write register %#x value %#x size=%d\n", daddr, + pkt->get<uint8_t>(), pkt->getSize()); + + // use a temporary data since the KMI registers are read/written with + // different size operations + // + uint32_t data = 0; + + switch (pkt->getSize()) { + case 1: + data = pkt->get<uint8_t>(); + break; + case 2: + data = pkt->get<uint16_t>(); + break; + case 4: + data = pkt->get<uint32_t>(); + break; + default: + panic("KMI write size too big?\n"); + break; + } + + + switch (daddr) { + case kmiCr: + control = data; + break; + case kmiStat: + panic("Tried to write PL050 register(read only) at offset %#x\n", + daddr); + break; + case kmiData: + kmidata = data; + break; + case kmiClkDiv: + clkdiv = data; + break; + case kmiISR: + panic("Tried to write PL050 register(read only) at offset %#x\n", + daddr); + break; + default: + warn("Tried to write PL050 at offset %#x that doesn't exist\n", daddr); + break; + } + pkt->makeAtomicResponse(); + return pioDelay; +} + +void +Pl050::generateInterrupt() +{ + if (intreg.rxintr || intreg.txintr) { + gic->sendInt(intNum); + DPRINTF(Pl050, " -- Generated\n"); + } +} + +Pl050 * +Pl050Params::create() +{ + return new Pl050(this); +} |