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Diffstat (limited to 'src/mem/ruby/storebuffer/storebuffer.hh')
| -rw-r--r-- | src/mem/ruby/storebuffer/storebuffer.hh | 151 |
1 files changed, 0 insertions, 151 deletions
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__ |