From 06a9f58c68b621f082d39299bdb01f59ef68ef0e Mon Sep 17 00:00:00 2001 From: Ali Saidi Date: Fri, 10 Aug 2007 16:14:01 -0400 Subject: [PATCH] DMA: Add IOCache and fix bus bridge to optionally only send requests one way so a cache can handle partial block requests for i/o devices. --HG-- extra : convert_revision : a68b5ae826731bc87ed93eb7ef326a2393053964 --- configs/common/Caches.py | 7 +++++ configs/common/FSConfig.py | 2 +- configs/example/fs.py | 7 ++++- src/base/range_ops.hh | 55 ++++++++++++++++++++++++++++++++++ src/dev/io_device.hh | 3 +- src/mem/Bridge.py | 6 ++-- src/mem/bridge.cc | 33 +++++--------------- src/mem/bridge.hh | 6 ++-- src/mem/bus.cc | 5 ++++ src/mem/bus.hh | 2 ++ src/mem/cache/BaseCache.py | 4 +++ src/mem/cache/base_cache.cc | 5 ++-- src/mem/cache/base_cache.hh | 16 ++++++++-- src/mem/cache/cache.hh | 6 ++-- src/mem/cache/cache_builder.cc | 3 +- src/mem/cache/cache_impl.hh | 23 +++++++++----- 16 files changed, 134 insertions(+), 49 deletions(-) create mode 100644 src/base/range_ops.hh diff --git a/configs/common/Caches.py b/configs/common/Caches.py index 43a1c6378..f1ea957b5 100644 --- a/configs/common/Caches.py +++ b/configs/common/Caches.py @@ -43,3 +43,10 @@ class L2Cache(BaseCache): mshrs = 20 tgts_per_mshr = 12 +class IOCache(BaseCache): + assoc = 8 + block_size = 64 + latency = '10ns' + mshrs = 20 + size = '1kB' + tgts_per_mshr = 12 diff --git a/configs/common/FSConfig.py b/configs/common/FSConfig.py index 6bcdafb14..9778be3f1 100644 --- a/configs/common/FSConfig.py +++ b/configs/common/FSConfig.py @@ -53,7 +53,7 @@ def makeLinuxAlphaSystem(mem_mode, mdesc = None): self.readfile = mdesc.script() self.iobus = Bus(bus_id=0) self.membus = Bus(bus_id=1) - self.bridge = Bridge(fix_partial_write_b=True, delay='50ns', nack_delay='4ns') + self.bridge = Bridge(delay='50ns', nack_delay='4ns') self.physmem = PhysicalMemory(range = AddrRange(mdesc.mem())) self.bridge.side_a = self.iobus.port self.bridge.side_b = self.membus.port diff --git a/configs/example/fs.py b/configs/example/fs.py index e772a3ab1..ca1408970 100644 --- a/configs/example/fs.py +++ b/configs/example/fs.py @@ -121,7 +121,12 @@ for i in xrange(np): if options.caches: test_sys.cpu[i].addPrivateSplitL1Caches(L1Cache(size = '32kB'), L1Cache(size = '64kB')) - + test_sys.bridge.filter_ranges_a=[AddrRange(0, Addr.max)] + test_sys.bridge.filter_ranges_b=[AddrRange(0, size='8GB')] + test_sys.iocache = IOCache(mem_side_filter_ranges=[AddrRange(0, Addr.max)], + cpu_side_filter_ranges=[AddrRange(0x8000000000, Addr.max)]) + test_sys.iocache.cpu_side = test_sys.iobus.port + test_sys.iocache.mem_side = test_sys.membus.port if options.l2cache: test_sys.cpu[i].connectMemPorts(test_sys.tol2bus) else: diff --git a/src/base/range_ops.hh b/src/base/range_ops.hh new file mode 100644 index 000000000..f2b11b649 --- /dev/null +++ b/src/base/range_ops.hh @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2007 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: Ali Saidi + */ + +#ifndef __BASE_RANGE_OPS_HH__ +#define __BASE_RANGE_OPS_HH__ +#include +#include + +#include "base/range.hh" + +template +inline void +FilterRangeList(std::vector > filter_list, std::list > + &range_list) { + typename std::list >::iterator i; + for (int x = 0; x < filter_list.size(); x++) { + for (i = range_list.begin(); i != range_list.end(); ) { + // Is the range within one of our filter ranges? + if (filter_list[x] == i->start || filter_list[x] == i->end) + range_list.erase(i++); + else + i++; + } + } +} + +#endif //__BASE_RANGE_OPS_HH__ + diff --git a/src/dev/io_device.hh b/src/dev/io_device.hh index e65400ca2..876166adb 100644 --- a/src/dev/io_device.hh +++ b/src/dev/io_device.hh @@ -266,8 +266,7 @@ class DmaDevice : public PioDevice void dmaWrite(Addr addr, int size, Event *event, uint8_t *data) { - dmaPort->dmaAction(MemCmd::WriteInvalidateReq, - addr, size, event, data); + dmaPort->dmaAction(MemCmd::WriteReq, addr, size, event, data); } void dmaRead(Addr addr, int size, Event *event, uint8_t *data) diff --git a/src/mem/Bridge.py b/src/mem/Bridge.py index 8377221cd..b48e1684d 100644 --- a/src/mem/Bridge.py +++ b/src/mem/Bridge.py @@ -40,5 +40,7 @@ class Bridge(MemObject): delay = Param.Latency('0ns', "The latency of this bridge") nack_delay = Param.Latency('0ns', "The latency of this bridge") write_ack = Param.Bool(False, "Should this bridge ack writes") - fix_partial_write_a = Param.Bool(False, "Should this bridge fixup partial block writes") - fix_partial_write_b = Param.Bool(False, "Should this bridge fixup partial block writes") + filter_ranges_a = VectorParam.AddrRange([], + "What addresses shouldn't be passed through the side of the bridge") + filter_ranges_b = VectorParam.AddrRange([], + "What addresses shouldn't be passed through the side of the bridge") diff --git a/src/mem/bridge.cc b/src/mem/bridge.cc index 6cfa5a2ac..c502c5130 100644 --- a/src/mem/bridge.cc +++ b/src/mem/bridge.cc @@ -37,6 +37,7 @@ #include +#include "base/range_ops.hh" #include "base/trace.hh" #include "mem/bridge.hh" #include "params/Bridge.hh" @@ -44,9 +45,10 @@ Bridge::BridgePort::BridgePort(const std::string &_name, Bridge *_bridge, BridgePort *_otherPort, int _delay, int _nack_delay, int _req_limit, - int _resp_limit, bool fix_partial_write) + int _resp_limit, + std::vector > filter_ranges) : Port(_name), bridge(_bridge), otherPort(_otherPort), - delay(_delay), nackDelay(_nack_delay), fixPartialWrite(fix_partial_write), + delay(_delay), nackDelay(_nack_delay), filterRanges(filter_ranges), outstandingResponses(0), queuedRequests(0), inRetry(false), reqQueueLimit(_req_limit), respQueueLimit(_resp_limit), sendEvent(this) { @@ -55,9 +57,9 @@ Bridge::BridgePort::BridgePort(const std::string &_name, Bridge::Bridge(Params *p) : MemObject(p->name), portA(p->name + "-portA", this, &portB, p->delay, p->nack_delay, - p->req_size_a, p->resp_size_a, p->fix_partial_write_a), + p->req_size_a, p->resp_size_a, p->filter_ranges_a), portB(p->name + "-portB", this, &portA, p->delay, p->nack_delay, - p->req_size_b, p->resp_size_b, p->fix_partial_write_b), + p->req_size_b, p->resp_size_b, p->filter_ranges_b), ackWrites(p->write_ack), _params(p) { if (ackWrites) @@ -243,17 +245,6 @@ Bridge::BridgePort::trySend() PacketPtr pkt = buf->pkt; - // Ugly! @todo When multilevel coherence works this will be removed - if (pkt->cmd == MemCmd::WriteInvalidateReq && fixPartialWrite && - !pkt->wasNacked()) { - PacketPtr funcPkt = new Packet(pkt->req, MemCmd::WriteReq, - Packet::Broadcast); - funcPkt->dataStatic(pkt->getPtr()); - sendFunctional(funcPkt); - pkt->cmd = MemCmd::WriteReq; - delete funcPkt; - } - DPRINTF(BusBridge, "trySend: origSrc %d dest %d addr 0x%x\n", buf->origSrc, pkt->getDest(), pkt->getAddr()); @@ -313,17 +304,6 @@ Bridge::BridgePort::recvRetry() Tick Bridge::BridgePort::recvAtomic(PacketPtr pkt) { - // fix partial atomic writes... similar to the timing code that does the - // same... will be removed once our code gets this right - if (pkt->cmd == MemCmd::WriteInvalidateReq && fixPartialWrite) { - - PacketPtr funcPkt = new Packet(pkt->req, MemCmd::WriteReq, - Packet::Broadcast); - funcPkt->dataStatic(pkt->getPtr()); - otherPort->sendFunctional(funcPkt); - delete funcPkt; - pkt->cmd = MemCmd::WriteReq; - } return delay + otherPort->sendAtomic(pkt); } @@ -355,6 +335,7 @@ Bridge::BridgePort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop) { otherPort->getPeerAddressRanges(resp, snoop); + FilterRangeList(filterRanges, resp); // we don't allow snooping across bridges snoop = false; } diff --git a/src/mem/bridge.hh b/src/mem/bridge.hh index d3bbf2ddf..82001948e 100644 --- a/src/mem/bridge.hh +++ b/src/mem/bridge.hh @@ -70,7 +70,8 @@ class Bridge : public MemObject /** Min delay to respond to a nack. */ Tick nackDelay; - bool fixPartialWrite; + /** Pass ranges from one side of the bridge to the other? */ + std::vector > filterRanges; class PacketBuffer : public Packet::SenderState { @@ -156,7 +157,8 @@ class Bridge : public MemObject /** Constructor for the BusPort.*/ BridgePort(const std::string &_name, Bridge *_bridge, BridgePort *_otherPort, int _delay, int _nack_delay, - int _req_limit, int _resp_limit, bool fix_partial_write); + int _req_limit, int _resp_limit, + std::vector > filter_ranges); protected: diff --git a/src/mem/bus.cc b/src/mem/bus.cc index eba96b4d2..42c4431bb 100644 --- a/src/mem/bus.cc +++ b/src/mem/bus.cc @@ -457,6 +457,10 @@ Bus::recvStatusChange(Port::Status status, int id) bool snoops; AddrRangeIter iter; + if (inRecvStatusChange.count(id)) + return; + inRecvStatusChange.insert(id); + assert(status == Port::RangeChange && "The other statuses need to be implemented."); @@ -524,6 +528,7 @@ Bus::recvStatusChange(Port::Status status, int id) if (id != defaultId && defaultPort) defaultPort->sendStatusChange(Port::RangeChange); + inRecvStatusChange.erase(id); } void diff --git a/src/mem/bus.hh b/src/mem/bus.hh index 83a4f6a55..0c594c463 100644 --- a/src/mem/bus.hh +++ b/src/mem/bus.hh @@ -38,6 +38,7 @@ #define __MEM_BUS_HH__ #include +#include #include #include @@ -253,6 +254,7 @@ class Bus : public MemObject BusFreeEvent busIdle; bool inRetry; + std::set inRecvStatusChange; /** max number of bus ids we've handed out so far */ short maxId; diff --git a/src/mem/cache/BaseCache.py b/src/mem/cache/BaseCache.py index 2bf44cdf9..f6d42b1ef 100644 --- a/src/mem/cache/BaseCache.py +++ b/src/mem/cache/BaseCache.py @@ -81,4 +81,8 @@ class BaseCache(MemObject): "Only prefetch on data not on instruction accesses") cpu_side = Port("Port on side closer to CPU") mem_side = Port("Port on side closer to MEM") + cpu_side_filter_ranges = VectorParam.AddrRange([], + "What addresses shouldn't be passed through the side of the bridge") + mem_side_filter_ranges = VectorParam.AddrRange([], + "What addresses shouldn't be passed through the side of the bridge") addr_range = VectorParam.AddrRange(AllMemory, "The address range in bytes") diff --git a/src/mem/cache/base_cache.cc b/src/mem/cache/base_cache.cc index b44468486..0c8b02cb3 100644 --- a/src/mem/cache/base_cache.cc +++ b/src/mem/cache/base_cache.cc @@ -40,9 +40,10 @@ using namespace std; -BaseCache::CachePort::CachePort(const std::string &_name, BaseCache *_cache) +BaseCache::CachePort::CachePort(const std::string &_name, BaseCache *_cache, + std::vector > filter_ranges) : SimpleTimingPort(_name, _cache), cache(_cache), otherPort(NULL), - blocked(false), mustSendRetry(false) + blocked(false), mustSendRetry(false), filterRanges(filter_ranges) { } diff --git a/src/mem/cache/base_cache.hh b/src/mem/cache/base_cache.hh index 719ab0245..6a4eec43e 100644 --- a/src/mem/cache/base_cache.hh +++ b/src/mem/cache/base_cache.hh @@ -98,7 +98,8 @@ class BaseCache : public MemObject BaseCache *cache; protected: - CachePort(const std::string &_name, BaseCache *_cache); + CachePort(const std::string &_name, BaseCache *_cache, + std::vector > filter_ranges); virtual void recvStatusChange(Status status); @@ -124,6 +125,9 @@ class BaseCache : public MemObject bool mustSendRetry; + /** filter ranges */ + std::vector > filterRanges; + void requestBus(RequestCause cause, Tick time) { DPRINTF(CachePort, "Asserting bus request for cause %d\n", cause); @@ -367,15 +371,21 @@ class BaseCache : public MemObject */ Counter maxMisses; + std::vector > cpuSideFilterRanges; + std::vector > memSideFilterRanges; /** * Construct an instance of this parameter class. */ Params(int _hitLatency, int _blkSize, int _numMSHRs, int _numTargets, int _numWriteBuffers, - Counter _maxMisses) + Counter _maxMisses, + std::vector > cpu_side_filter_ranges, + std::vector > mem_side_filter_ranges) : hitLatency(_hitLatency), blkSize(_blkSize), numMSHRs(_numMSHRs), numTargets(_numTargets), - numWriteBuffers(_numWriteBuffers), maxMisses(_maxMisses) + numWriteBuffers(_numWriteBuffers), maxMisses(_maxMisses), + cpuSideFilterRanges(cpu_side_filter_ranges), + memSideFilterRanges(mem_side_filter_ranges) { } }; diff --git a/src/mem/cache/cache.hh b/src/mem/cache/cache.hh index 57028a05e..821fa9702 100644 --- a/src/mem/cache/cache.hh +++ b/src/mem/cache/cache.hh @@ -72,7 +72,8 @@ class Cache : public BaseCache { public: CpuSidePort(const std::string &_name, - Cache *_cache); + Cache *_cache, + std::vector > filterRanges); // BaseCache::CachePort just has a BaseCache *; this function // lets us get back the type info we lost when we stored the @@ -95,7 +96,8 @@ class Cache : public BaseCache { public: MemSidePort(const std::string &_name, - Cache *_cache); + Cache *_cache, + std::vector > filterRanges); // BaseCache::CachePort just has a BaseCache *; this function // lets us get back the type info we lost when we stored the diff --git a/src/mem/cache/cache_builder.cc b/src/mem/cache/cache_builder.cc index 4c9592a1b..0f8b52af2 100644 --- a/src/mem/cache/cache_builder.cc +++ b/src/mem/cache/cache_builder.cc @@ -241,7 +241,8 @@ BaseCacheParams::create() // Build BaseCache param object BaseCache::Params base_params(latency, block_size, mshrs, tgts_per_mshr, write_buffers, - max_miss_count); + max_miss_count, cpu_side_filter_ranges, + mem_side_filter_ranges); //Warnings about prefetcher policy if (prefetch_policy == Enums::none) { diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh index d144266ed..402e34db2 100644 --- a/src/mem/cache/cache_impl.hh +++ b/src/mem/cache/cache_impl.hh @@ -39,6 +39,7 @@ #include "sim/host.hh" #include "base/misc.hh" +#include "base/range_ops.hh" #include "mem/cache/cache.hh" #include "mem/cache/cache_blk.hh" @@ -61,8 +62,10 @@ Cache::Cache(const std::string &_name, tempBlock = new BlkType(); tempBlock->data = new uint8_t[blkSize]; - cpuSidePort = new CpuSidePort(_name + "-cpu_side_port", this); - memSidePort = new MemSidePort(_name + "-mem_side_port", this); + cpuSidePort = new CpuSidePort(_name + "-cpu_side_port", this, + params.baseParams.cpuSideFilterRanges); + memSidePort = new MemSidePort(_name + "-mem_side_port", this, + params.baseParams.memSideFilterRanges); cpuSidePort->setOtherPort(memSidePort); memSidePort->setOtherPort(cpuSidePort); @@ -88,7 +91,8 @@ Cache::getPort(const std::string &if_name, int idx) } else if (if_name == "mem_side") { return memSidePort; } else if (if_name == "functional") { - return new CpuSidePort(name() + "-cpu_side_funcport", this); + return new CpuSidePort(name() + "-cpu_side_funcport", this, + std::vector >()); } else { panic("Port name %s unrecognized\n", if_name); } @@ -1221,6 +1225,7 @@ getDeviceAddressRanges(AddrRangeList &resp, bool &snoop) // CPU side port doesn't snoop; it's a target only. bool dummy; otherPort->getPeerAddressRanges(resp, dummy); + FilterRangeList(filterRanges, resp); snoop = false; } @@ -1262,8 +1267,9 @@ Cache::CpuSidePort::recvFunctional(PacketPtr pkt) template Cache:: CpuSidePort::CpuSidePort(const std::string &_name, - Cache *_cache) - : BaseCache::CachePort(_name, _cache) + Cache *_cache, std::vector > + filterRanges) + : BaseCache::CachePort(_name, _cache, filterRanges) { } @@ -1279,6 +1285,8 @@ Cache::MemSidePort:: getDeviceAddressRanges(AddrRangeList &resp, bool &snoop) { otherPort->getPeerAddressRanges(resp, snoop); + FilterRangeList(filterRanges, resp); + // Memory-side port always snoops, so unconditionally set flag for // caller. snoop = true; @@ -1416,8 +1424,9 @@ Cache::MemSidePort::processSendEvent() template Cache:: -MemSidePort::MemSidePort(const std::string &_name, Cache *_cache) - : BaseCache::CachePort(_name, _cache) +MemSidePort::MemSidePort(const std::string &_name, Cache *_cache, + std::vector > filterRanges) + : BaseCache::CachePort(_name, _cache, filterRanges) { // override default send event from SimpleTimingPort delete sendEvent; -- 2.30.2