diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mem/ruby/storebuffer/SConscript | 37 | ||||
| -rw-r--r-- | src/mem/ruby/storebuffer/stb_interface.cc | 85 | ||||
| -rw-r--r-- | src/mem/ruby/storebuffer/stb_interface.hh | 38 | ||||
| -rw-r--r-- | src/mem/ruby/storebuffer/storebuffer.cc | 299 | ||||
| -rw-r--r-- | src/mem/ruby/storebuffer/storebuffer.hh | 151 |
5 files changed, 0 insertions, 610 deletions
diff --git a/src/mem/ruby/storebuffer/SConscript b/src/mem/ruby/storebuffer/SConscript deleted file mode 100644 index f546b9e60..000000000 --- a/src/mem/ruby/storebuffer/SConscript +++ /dev/null @@ -1,37 +0,0 @@ -# -*- mode:python -*- - -# Copyright (c) 2009 The Hewlett-Packard Development Company -# 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: Nathan Binkert - -Import('*') - -if not env['RUBY']: - Return() - -Source('stb_interface.cc') -Source('storebuffer.cc') diff --git a/src/mem/ruby/storebuffer/stb_interface.cc b/src/mem/ruby/storebuffer/stb_interface.cc deleted file mode 100644 index e3d6f29ed..000000000 --- a/src/mem/ruby/storebuffer/stb_interface.cc +++ /dev/null @@ -1,85 +0,0 @@ -/* - * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood - * 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. - */ - -#include <iostream> - -#include "mem/ruby/storebuffer/stb_interface.hh" - -StoreBuffer * -createNewSTB(uint32 id, uint32 block_bits, int storebuffer_size) -{ - StoreBuffer *stb = new StoreBuffer(id, block_bits, storebuffer_size); - return stb; -} - -storebuffer_status_t -handleStore(StoreBuffer *storebuffer, const RubyRequest &request) -{ - assert(request.type == RubyRequestType_ST); - if (storebuffer->storeBufferFull()){ - return WB_FULL; - } else if (storebuffer->storeBufferFlushing()) { - return WB_FLUSHING; - } else { - storebuffer->addToStoreBuffer(request); - return WB_OK; - } -} - -uint64_t -handleLoad(StoreBuffer *storebuffer, const RubyRequest &request) -{ - assert(request.type == RubyRequestType_LD); - return storebuffer->handleLoad(request); -} - -#if 0 -uint64_t -handleAtomic(StoreBuffer *storebuffer, const RubyRequest &request) -{ - // flush the store buffer - storebuffer->flushStoreBuffer(); - // let storebuffer issue atomic - // return storebuffer->issueAtomic(request); -} -#endif - -void -flushSTB(StoreBuffer *storebuffer) -{ - // in in-order can't get a request to flushSTB if already flushing - // on out of order, have to check if already flushing - storebuffer->flushStoreBuffer(); -} - -void -registerHitCallback(StoreBuffer *storebuffer, - void (*hit_callback)(int64_t access_id)) -{ - storebuffer->registerHitCallback(hit_callback); -} diff --git a/src/mem/ruby/storebuffer/stb_interface.hh b/src/mem/ruby/storebuffer/stb_interface.hh deleted file mode 100644 index b7f1b152d..000000000 --- a/src/mem/ruby/storebuffer/stb_interface.hh +++ /dev/null @@ -1,38 +0,0 @@ -/* - * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood - * 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. - */ - -#include "mem/ruby/storebuffer/storebuffer.hh" - -StoreBuffer *createNewSTB(uint32 id, uint32 block_bits, int storebuffer_size); -storebuffer_status_t handleStore(StoreBuffer *storebuffer, - const RubyRequest &request); -uint64_t handleLoad(StoreBuffer *storebuffer, const RubyRequest &request); -uint64_t handleAtomic(StoreBuffer *storebuffer, const RubyRequest &request); -void flushSTB(StoreBuffer *storebuffer); -void registerHitCallback(StoreBuffer *storebuffer, - void (*hit_callback)(int64_t access_id)); diff --git a/src/mem/ruby/storebuffer/storebuffer.cc b/src/mem/ruby/storebuffer/storebuffer.cc deleted file mode 100644 index 0accf138d..000000000 --- a/src/mem/ruby/storebuffer/storebuffer.cc +++ /dev/null @@ -1,299 +0,0 @@ -/* - * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood - * 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. - */ - -#include <cassert> -#include <cstdio> -#include <map> - -#include "base/trace.hh" -#include "mem/ruby/common/Global.hh" -#include "mem/ruby/storebuffer/storebuffer.hh" - -using namespace std; - -#define SYSTEM_EXIT assert(0) - -// global map of request id_s to map them back to storebuffer pointers -map<uint64_t, StoreBuffer *> request_map; - -void -hit(int64_t id) -{ - if (request_map.find(id) == request_map.end()) { - panic("Request ID %d not found in the map\n", id); - } else { - request_map[id]->complete(id); - request_map.erase(id); - } -} - -StoreBuffer::StoreBuffer(uint32 id, uint32 block_bits, int storebuffer_size) -{ - iseq = 0; - tso_iseq = 0; - char name [] = "Sequencer_"; - char port_name [13]; - sprintf(port_name, "%s%d", name, id); - m_hit_callback = NULL; - assert(storebuffer_size >= 0); - m_storebuffer_size = storebuffer_size; - m_id = id; - m_block_size = 1 << block_bits; - m_block_mask = ~(m_block_size - 1); - m_buffer_size = 0; - m_storebuffer_full = false; - m_storebuffer_flushing = false; - m_stalled_issue = true; -} - -StoreBuffer::~StoreBuffer() -{ -} - -void -StoreBuffer::registerHitCallback(void (*hit_callback)(int64_t request_id)) -{ - assert(m_hit_callback == NULL); // can't assign hit_callback twice - m_hit_callback = hit_callback; -} - - -void -StoreBuffer::addToStoreBuffer(RubyRequest request) -{ - buffer.push_front(SBEntry(request, NULL)); - - m_buffer_size++; - - if (m_buffer_size >= m_storebuffer_size) { - m_storebuffer_full = true; - } else if (m_stalled_issue) { - m_stalled_issue = false; - issueNextStore(); - } - - iseq++; -} - - -// Return value of -2 indicates that the load request was satisfied by -// the store buffer -// Return value of -3 indicates a partial match, so the load has to -// retry until NO_MATCH -// Alternatively we could satisfy the partial match, but tso gets -// complicated and more races -int64_t -StoreBuffer::handleLoad(RubyRequest request) -{ - load_match match = checkForLoadHit(request); - if (match == FULL_MATCH) { - // fill data - returnMatchedData(request); - iseq++; - return -2; - } else { // partial match - return -3; - } -} - -// This function will fill the data array if any match is found -load_match -StoreBuffer::checkForLoadHit(RubyRequest request) -{ - physical_address_t physical_address = request.paddr; - int len = request.len; - - uint8_t * data = new uint8_t[64]; - memset(data, 0, 64); - for (int i = physical_address % 64; i < len; i++) - data[i] = 1; - - bool found = false; - physical_address_t lineaddr = physical_address & m_block_mask; - - // iterate over the buffer looking for hits - deque<SBEntry>::iterator it = buffer.begin(); - for (; it != buffer.end(); it++) { - RubyRequest &req = it->m_request; - if ((req.paddr & m_block_mask) != lineaddr) - continue; - - found = true; - for (int i = req.paddr % 64; i < req.len; i++) - data[i] = 0; - } - - // if any matching entry is found, determine if all the - // requested bytes have been matched - if (found) { - assert(m_buffer_size > 0); - int unmatched_bytes = 0; - for (int i = physical_address%64; i < len; i++) { - unmatched_bytes = unmatched_bytes + data[i]; - } - if (unmatched_bytes == 0) { - delete data; - return FULL_MATCH; - } else { - delete data; - return PARTIAL_MATCH; - } - } else { - delete data; - return NO_MATCH; - } -} - -void -StoreBuffer::returnMatchedData(RubyRequest request) -{ - if (!m_use_storebuffer) { - panic("returnMatchedData called while write buffer is not in use\n"); - } - - uint8_t * data = new uint8_t[64]; - memset(data, 0, 64); - uint8_t * written = new uint8_t[64]; - memset(written, 0, 64); - - physical_address_t physical_address = request.paddr; - int len = request.len; - - assert(checkForLoadHit(request) != NO_MATCH); - physical_address_t lineaddr = physical_address & m_block_mask; - bool found = false; - deque<SBEntry>::iterator satisfying_store; - deque<SBEntry>::iterator it = buffer.begin(); - for (; it != buffer.end(); it++) { - if ((it->m_request.paddr & m_block_mask) == lineaddr) { - if (!found) { - found = true; - } - uint8_t * dataPtr = it->m_request.data; - int offset = it->m_request.paddr%64; - for (int i = offset; i < it->m_request.len; i++) { - if (!written[i]) { // don't overwrite data with earlier data - data[i] = dataPtr[i-offset]; - written[i] = 1; - } - } - } - } - - int i = physical_address%64; - for (int j = 0; (i < physical_address%64 + len) && (j < len); i++, j++) { - if (written[i]) { - request.data[j] = data[i]; - } - } - - delete data; - delete written; -} - -void -StoreBuffer::flushStoreBuffer() -{ - if (!m_use_storebuffer) { - // do nothing - return; - } - - m_storebuffer_flushing = (m_buffer_size > 0); -} - -void -StoreBuffer::issueNextStore() -{ -} - -void -StoreBuffer::complete(uint64_t id) -{ - if (!m_use_storebuffer) { - m_hit_callback(id); - return; - } - - assert(outstanding_requests.find(id) != outstanding_requests.end()); - physical_address_t physical_address = - outstanding_requests.find(id)->second.paddr; - RubyRequestType type = outstanding_requests.find(id)->second.type; - - if (type == RubyRequestType_ST) { - physical_address_t lineaddr = physical_address & m_block_mask; - - // Note fastpath hits are handled like regular requests - they - // must remove the WB entry! - if (lineaddr != physical_address) { - warn("error: StoreBuffer: ruby returns pa 0x%0llx " - "which is not a cache line: 0x%0llx\n", - physical_address, lineaddr); - } - - SBEntry from_buffer = buffer.back(); - if ((from_buffer.m_request.paddr & m_block_mask) == lineaddr && - from_buffer.m_request.type == type) { - buffer.pop_back(); - m_buffer_size--; - assert(m_buffer_size >= 0); - - // schedule the next request - if (m_buffer_size > 0) { - issueNextStore(); - } else if (m_buffer_size == 0) { - m_storebuffer_flushing = false; - m_stalled_issue = true; - } - - m_storebuffer_full = false; - } else { - panic("[%d] error: StoreBuffer: at complete, address 0x%0llx " - "not found.\n" - "StoreBuffer:: complete FAILS\n", - m_id, lineaddr); - } - - } else if (type == RubyRequestType_LD) { - m_hit_callback(id); - } - - // LD, ST or FETCH hit callback - outstanding_requests.erase(id); -} - -void -StoreBuffer::print() -{ - DPRINTF(RubyStorebuffer, "[%d] StoreBuffer: Total entries: %d " - "Outstanding: %d\n", - m_id, m_storebuffer_size, m_buffer_size); - - if (!m_use_storebuffer) - DPRINTF(RubyStorebuffer, "\t WRITE BUFFER NOT USED\n"); -} diff --git a/src/mem/ruby/storebuffer/storebuffer.hh b/src/mem/ruby/storebuffer/storebuffer.hh deleted file mode 100644 index b2b8483fd..000000000 --- a/src/mem/ruby/storebuffer/storebuffer.hh +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood - * 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. - */ - -#ifndef __MEM_RUBY_STOREBUFFER_STOREBUFFER_HH__ -#define __MEM_RUBY_STOREBUFFER_STOREBUFFER_HH__ - -#include <deque> -#include <map> - -#include "mem/ruby/common/TypeDefines.hh" -#include "mem/ruby/slicc_interface/RubyRequest.hh" - -/** - * Status for write buffer accesses. The Write buffer can hit in - * fastpath, be full, or successfully enqueue the store request - */ -enum storebuffer_status_t { WB_FULL, WB_OK, WB_FLUSHING }; - -/** - * Status of a load match - */ -enum load_match { NO_MATCH, PARTIAL_MATCH, FULL_MATCH }; - -struct SBEntry -{ - RubyRequest m_request; - - SBEntry(RubyRequest request, void * ptr) - : m_request(request) - { - } -}; - -class StoreBuffer -{ - public: - /// Note that the size of the Write Buffer is determined by the - /// WRITE_BUFFER_SIZE config parameter - StoreBuffer(uint32_t id, uint32_t block_bits, int storebuffer_size); - - ~StoreBuffer(); - - /// Register hitcallback back to CPU - void registerHitCallback(void (*hit_callback)(int64_t request_id)); - - ///Adds a store entry to the write buffer - void addToStoreBuffer(RubyRequest request); - - ///Flushes the entire write buffer - void flushStoreBuffer(); - - ///A pseq object calls this when Ruby completes our request - void complete(uint64_t); - - /// Returns ID. If ID == -2, HIT, else it's an ID to wait on - int64_t handleLoad(RubyRequest request); - - /// Used by all load insts to check whether it hits to any entry - /// in the WB. If so, the WB is flushed - load_match checkForLoadHit(RubyRequest request); - - /// Used to fill the load in case of FULL_MATCH - void returnMatchedData(RubyRequest request); - - /// Issue next store in line - void issueNextStore(); - - /// prints out the contents of the Write Buffer - void print(); - - /// Returns flag indicating whether we are using the write buffer - bool useStoreBuffer() { return m_use_storebuffer; } - - bool storeBufferFull() { return m_storebuffer_full; } - - bool storeBufferFlushing() { return m_storebuffer_flushing; } - - private: - /// id of this write buffer (one per sequencer object) - uint32_t m_id; - - /// number of bytes in cacheline - uint32_t m_block_size; - - /// the size of the write buffer - uint32_t m_storebuffer_size; - - /// mask to strip off non-cache line bits - pa_t m_block_mask; - - /// list of store requests in the write buffer - std::deque<SBEntry> buffer; - - /// the current length of the write buffer - uint32_t m_buffer_size; - - /// whether we want to simulate the write buffer or not: - bool m_use_storebuffer; - - /// indicates whether the write buffer is full or not - bool m_storebuffer_full; - - /// indicates that we are currently flushing the write buffer - bool m_storebuffer_flushing; - - /// indicates that automatic issue is stalled and the next store - /// to be added should issue itself - bool m_stalled_issue; - - /// RubyPort to make requests to - RubyPortHandle m_port; - - /// HitCallback to CPU - void (*m_hit_callback)(int64_t); - - /// Map the request id to rubyrequest - std::map<uint64_t, RubyRequest> outstanding_requests; - - /// current instruction counter - uint64_t iseq; - - /// input into tso counter - uint64_t tso_iseq; -}; - -#endif // __MEM_RUBY_STOREBUFFER_STOREBUFFER_HH__ |