113223Sodanrc@yahoo.com.br/* 213223Sodanrc@yahoo.com.br * Copyright (c) 2012-2018 ARM Limited 313223Sodanrc@yahoo.com.br * All rights reserved. 413223Sodanrc@yahoo.com.br * 513223Sodanrc@yahoo.com.br * The license below extends only to copyright in the software and shall 613223Sodanrc@yahoo.com.br * not be construed as granting a license to any other intellectual 713223Sodanrc@yahoo.com.br * property including but not limited to intellectual property relating 813223Sodanrc@yahoo.com.br * to a hardware implementation of the functionality of the software 913223Sodanrc@yahoo.com.br * licensed hereunder. You may use the software subject to the license 1013223Sodanrc@yahoo.com.br * terms below provided that you ensure that this notice is replicated 1113223Sodanrc@yahoo.com.br * unmodified and in its entirety in all distributions of the software, 1213223Sodanrc@yahoo.com.br * modified or unmodified, in source code or in binary form. 1313223Sodanrc@yahoo.com.br * 1413223Sodanrc@yahoo.com.br * Copyright (c) 2003-2005 The Regents of The University of Michigan 1513223Sodanrc@yahoo.com.br * All rights reserved. 1613223Sodanrc@yahoo.com.br * 1713223Sodanrc@yahoo.com.br * Redistribution and use in source and binary forms, with or without 1813223Sodanrc@yahoo.com.br * modification, are permitted provided that the following conditions are 1913223Sodanrc@yahoo.com.br * met: redistributions of source code must retain the above copyright 2013223Sodanrc@yahoo.com.br * notice, this list of conditions and the following disclaimer; 2113223Sodanrc@yahoo.com.br * redistributions in binary form must reproduce the above copyright 2213223Sodanrc@yahoo.com.br * notice, this list of conditions and the following disclaimer in the 2313223Sodanrc@yahoo.com.br * documentation and/or other materials provided with the distribution; 2413223Sodanrc@yahoo.com.br * neither the name of the copyright holders nor the names of its 2513223Sodanrc@yahoo.com.br * contributors may be used to endorse or promote products derived from 2613223Sodanrc@yahoo.com.br * this software without specific prior written permission. 2713223Sodanrc@yahoo.com.br * 2813223Sodanrc@yahoo.com.br * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2913223Sodanrc@yahoo.com.br * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3013223Sodanrc@yahoo.com.br * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 3113223Sodanrc@yahoo.com.br * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3213223Sodanrc@yahoo.com.br * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 3313223Sodanrc@yahoo.com.br * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3413223Sodanrc@yahoo.com.br * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3513223Sodanrc@yahoo.com.br * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3613223Sodanrc@yahoo.com.br * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3713223Sodanrc@yahoo.com.br * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3813223Sodanrc@yahoo.com.br * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3913223Sodanrc@yahoo.com.br * 4013223Sodanrc@yahoo.com.br * Authors: Erik Hallnor 4113223Sodanrc@yahoo.com.br * Andreas Sandberg 4213223Sodanrc@yahoo.com.br */ 4313223Sodanrc@yahoo.com.br 4413223Sodanrc@yahoo.com.br/** @file 4513223Sodanrc@yahoo.com.br * Definitions of a simple cache block class. 4613223Sodanrc@yahoo.com.br */ 4713223Sodanrc@yahoo.com.br 4813223Sodanrc@yahoo.com.br#ifndef __MEM_CACHE_CACHE_BLK_HH__ 4913223Sodanrc@yahoo.com.br#define __MEM_CACHE_CACHE_BLK_HH__ 5013223Sodanrc@yahoo.com.br 5113223Sodanrc@yahoo.com.br#include <cassert> 5213223Sodanrc@yahoo.com.br#include <cstdint> 5313223Sodanrc@yahoo.com.br#include <iosfwd> 5413223Sodanrc@yahoo.com.br#include <list> 5513223Sodanrc@yahoo.com.br#include <string> 5613223Sodanrc@yahoo.com.br 5713223Sodanrc@yahoo.com.br#include "base/printable.hh" 5813223Sodanrc@yahoo.com.br#include "base/types.hh" 5913223Sodanrc@yahoo.com.br#include "mem/cache/replacement_policies/base.hh" 6013223Sodanrc@yahoo.com.br#include "mem/packet.hh" 6113223Sodanrc@yahoo.com.br#include "mem/request.hh" 6213223Sodanrc@yahoo.com.br 6313223Sodanrc@yahoo.com.br/** 6413223Sodanrc@yahoo.com.br * Cache block status bit assignments 6513223Sodanrc@yahoo.com.br */ 6613223Sodanrc@yahoo.com.brenum CacheBlkStatusBits : unsigned { 6713223Sodanrc@yahoo.com.br /** valid, readable */ 6813223Sodanrc@yahoo.com.br BlkValid = 0x01, 6913223Sodanrc@yahoo.com.br /** write permission */ 7013223Sodanrc@yahoo.com.br BlkWritable = 0x02, 7113223Sodanrc@yahoo.com.br /** read permission (yes, block can be valid but not readable) */ 7213223Sodanrc@yahoo.com.br BlkReadable = 0x04, 7313223Sodanrc@yahoo.com.br /** dirty (modified) */ 7413223Sodanrc@yahoo.com.br BlkDirty = 0x08, 7513223Sodanrc@yahoo.com.br /** block was a hardware prefetch yet unaccessed*/ 7613223Sodanrc@yahoo.com.br BlkHWPrefetched = 0x20, 7713223Sodanrc@yahoo.com.br /** block holds data from the secure memory space */ 7813223Sodanrc@yahoo.com.br BlkSecure = 0x40, 7913940Sodanrc@yahoo.com.br /** block holds compressed data */ 8013940Sodanrc@yahoo.com.br BlkCompressed = 0x80 8113223Sodanrc@yahoo.com.br}; 8213223Sodanrc@yahoo.com.br 8313223Sodanrc@yahoo.com.br/** 8413223Sodanrc@yahoo.com.br * A Basic Cache block. 8513223Sodanrc@yahoo.com.br * Contains the tag, status, and a pointer to data. 8613223Sodanrc@yahoo.com.br */ 8713223Sodanrc@yahoo.com.brclass CacheBlk : public ReplaceableEntry 8813223Sodanrc@yahoo.com.br{ 8913223Sodanrc@yahoo.com.br public: 9013223Sodanrc@yahoo.com.br /** Task Id associated with this block */ 9113223Sodanrc@yahoo.com.br uint32_t task_id; 9213223Sodanrc@yahoo.com.br 9313223Sodanrc@yahoo.com.br /** Data block tag value. */ 9413223Sodanrc@yahoo.com.br Addr tag; 9513223Sodanrc@yahoo.com.br /** 9613223Sodanrc@yahoo.com.br * Contains a copy of the data in this block for easy access. This is used 9713223Sodanrc@yahoo.com.br * for efficient execution when the data could be actually stored in 9813223Sodanrc@yahoo.com.br * another format (COW, compressed, sub-blocked, etc). In all cases the 9913223Sodanrc@yahoo.com.br * data stored here should be kept consistant with the actual data 10013223Sodanrc@yahoo.com.br * referenced by this block. 10113223Sodanrc@yahoo.com.br */ 10213223Sodanrc@yahoo.com.br uint8_t *data; 10313223Sodanrc@yahoo.com.br 10413223Sodanrc@yahoo.com.br /** block state: OR of CacheBlkStatusBit */ 10513223Sodanrc@yahoo.com.br typedef unsigned State; 10613223Sodanrc@yahoo.com.br 10713223Sodanrc@yahoo.com.br /** The current status of this block. @sa CacheBlockStatusBits */ 10813223Sodanrc@yahoo.com.br State status; 10913223Sodanrc@yahoo.com.br 11013477Sodanrc@yahoo.com.br /** 11113477Sodanrc@yahoo.com.br * Which curTick() will this block be accessible. Its value is only 11213477Sodanrc@yahoo.com.br * meaningful if the block is valid. 11313477Sodanrc@yahoo.com.br */ 11413223Sodanrc@yahoo.com.br Tick whenReady; 11513223Sodanrc@yahoo.com.br 11613223Sodanrc@yahoo.com.br /** Number of references to this block since it was brought in. */ 11713223Sodanrc@yahoo.com.br unsigned refCount; 11813223Sodanrc@yahoo.com.br 11913223Sodanrc@yahoo.com.br /** holds the source requestor ID for this block. */ 12013223Sodanrc@yahoo.com.br int srcMasterId; 12113223Sodanrc@yahoo.com.br 12213477Sodanrc@yahoo.com.br /** 12313477Sodanrc@yahoo.com.br * Tick on which the block was inserted in the cache. Its value is only 12413477Sodanrc@yahoo.com.br * meaningful if the block is valid. 12513477Sodanrc@yahoo.com.br */ 12613223Sodanrc@yahoo.com.br Tick tickInserted; 12713223Sodanrc@yahoo.com.br 12813223Sodanrc@yahoo.com.br protected: 12913223Sodanrc@yahoo.com.br /** 13013223Sodanrc@yahoo.com.br * Represents that the indicated thread context has a "lock" on 13113223Sodanrc@yahoo.com.br * the block, in the LL/SC sense. 13213223Sodanrc@yahoo.com.br */ 13313223Sodanrc@yahoo.com.br class Lock { 13413223Sodanrc@yahoo.com.br public: 13513223Sodanrc@yahoo.com.br ContextID contextId; // locking context 13613223Sodanrc@yahoo.com.br Addr lowAddr; // low address of lock range 13713223Sodanrc@yahoo.com.br Addr highAddr; // high address of lock range 13813223Sodanrc@yahoo.com.br 13913223Sodanrc@yahoo.com.br // check for matching execution context, and an address that 14013223Sodanrc@yahoo.com.br // is within the lock 14113223Sodanrc@yahoo.com.br bool matches(const RequestPtr &req) const 14213223Sodanrc@yahoo.com.br { 14313223Sodanrc@yahoo.com.br Addr req_low = req->getPaddr(); 14413223Sodanrc@yahoo.com.br Addr req_high = req_low + req->getSize() -1; 14513223Sodanrc@yahoo.com.br return (contextId == req->contextId()) && 14613223Sodanrc@yahoo.com.br (req_low >= lowAddr) && (req_high <= highAddr); 14713223Sodanrc@yahoo.com.br } 14813223Sodanrc@yahoo.com.br 14913223Sodanrc@yahoo.com.br // check if a request is intersecting and thus invalidating the lock 15013223Sodanrc@yahoo.com.br bool intersects(const RequestPtr &req) const 15113223Sodanrc@yahoo.com.br { 15213223Sodanrc@yahoo.com.br Addr req_low = req->getPaddr(); 15313223Sodanrc@yahoo.com.br Addr req_high = req_low + req->getSize() - 1; 15413223Sodanrc@yahoo.com.br 15513223Sodanrc@yahoo.com.br return (req_low <= highAddr) && (req_high >= lowAddr); 15613223Sodanrc@yahoo.com.br } 15713223Sodanrc@yahoo.com.br 15813223Sodanrc@yahoo.com.br Lock(const RequestPtr &req) 15913223Sodanrc@yahoo.com.br : contextId(req->contextId()), 16013223Sodanrc@yahoo.com.br lowAddr(req->getPaddr()), 16113223Sodanrc@yahoo.com.br highAddr(lowAddr + req->getSize() - 1) 16213223Sodanrc@yahoo.com.br { 16313223Sodanrc@yahoo.com.br } 16413223Sodanrc@yahoo.com.br }; 16513223Sodanrc@yahoo.com.br 16613223Sodanrc@yahoo.com.br /** List of thread contexts that have performed a load-locked (LL) 16713223Sodanrc@yahoo.com.br * on the block since the last store. */ 16813223Sodanrc@yahoo.com.br std::list<Lock> lockList; 16913223Sodanrc@yahoo.com.br 17013223Sodanrc@yahoo.com.br public: 17113477Sodanrc@yahoo.com.br CacheBlk() : data(nullptr), tickInserted(0) 17213223Sodanrc@yahoo.com.br { 17313223Sodanrc@yahoo.com.br invalidate(); 17413223Sodanrc@yahoo.com.br } 17513223Sodanrc@yahoo.com.br 17613223Sodanrc@yahoo.com.br CacheBlk(const CacheBlk&) = delete; 17713223Sodanrc@yahoo.com.br CacheBlk& operator=(const CacheBlk&) = delete; 17813223Sodanrc@yahoo.com.br virtual ~CacheBlk() {}; 17913223Sodanrc@yahoo.com.br 18013223Sodanrc@yahoo.com.br /** 18113223Sodanrc@yahoo.com.br * Checks the write permissions of this block. 18213223Sodanrc@yahoo.com.br * @return True if the block is writable. 18313223Sodanrc@yahoo.com.br */ 18413223Sodanrc@yahoo.com.br bool isWritable() const 18513223Sodanrc@yahoo.com.br { 18613223Sodanrc@yahoo.com.br const State needed_bits = BlkWritable | BlkValid; 18713223Sodanrc@yahoo.com.br return (status & needed_bits) == needed_bits; 18813223Sodanrc@yahoo.com.br } 18913223Sodanrc@yahoo.com.br 19013223Sodanrc@yahoo.com.br /** 19113223Sodanrc@yahoo.com.br * Checks the read permissions of this block. Note that a block 19213223Sodanrc@yahoo.com.br * can be valid but not readable if there is an outstanding write 19313223Sodanrc@yahoo.com.br * upgrade miss. 19413223Sodanrc@yahoo.com.br * @return True if the block is readable. 19513223Sodanrc@yahoo.com.br */ 19613223Sodanrc@yahoo.com.br bool isReadable() const 19713223Sodanrc@yahoo.com.br { 19813223Sodanrc@yahoo.com.br const State needed_bits = BlkReadable | BlkValid; 19913223Sodanrc@yahoo.com.br return (status & needed_bits) == needed_bits; 20013223Sodanrc@yahoo.com.br } 20113223Sodanrc@yahoo.com.br 20213223Sodanrc@yahoo.com.br /** 20313223Sodanrc@yahoo.com.br * Checks that a block is valid. 20413223Sodanrc@yahoo.com.br * @return True if the block is valid. 20513223Sodanrc@yahoo.com.br */ 20613223Sodanrc@yahoo.com.br bool isValid() const 20713223Sodanrc@yahoo.com.br { 20813223Sodanrc@yahoo.com.br return (status & BlkValid) != 0; 20913223Sodanrc@yahoo.com.br } 21013223Sodanrc@yahoo.com.br 21113223Sodanrc@yahoo.com.br /** 21213223Sodanrc@yahoo.com.br * Invalidate the block and clear all state. 21313223Sodanrc@yahoo.com.br */ 21413223Sodanrc@yahoo.com.br virtual void invalidate() 21513223Sodanrc@yahoo.com.br { 21613223Sodanrc@yahoo.com.br tag = MaxAddr; 21713223Sodanrc@yahoo.com.br task_id = ContextSwitchTaskId::Unknown; 21813223Sodanrc@yahoo.com.br status = 0; 21913223Sodanrc@yahoo.com.br whenReady = MaxTick; 22013223Sodanrc@yahoo.com.br refCount = 0; 22113223Sodanrc@yahoo.com.br srcMasterId = Request::invldMasterId; 22213223Sodanrc@yahoo.com.br lockList.clear(); 22313223Sodanrc@yahoo.com.br } 22413223Sodanrc@yahoo.com.br 22513223Sodanrc@yahoo.com.br /** 22613223Sodanrc@yahoo.com.br * Check to see if a block has been written. 22713223Sodanrc@yahoo.com.br * @return True if the block is dirty. 22813223Sodanrc@yahoo.com.br */ 22913223Sodanrc@yahoo.com.br bool isDirty() const 23013223Sodanrc@yahoo.com.br { 23113223Sodanrc@yahoo.com.br return (status & BlkDirty) != 0; 23213223Sodanrc@yahoo.com.br } 23313223Sodanrc@yahoo.com.br 23413223Sodanrc@yahoo.com.br /** 23513223Sodanrc@yahoo.com.br * Check if this block was the result of a hardware prefetch, yet to 23613223Sodanrc@yahoo.com.br * be touched. 23713223Sodanrc@yahoo.com.br * @return True if the block was a hardware prefetch, unaccesed. 23813223Sodanrc@yahoo.com.br */ 23913223Sodanrc@yahoo.com.br bool wasPrefetched() const 24013223Sodanrc@yahoo.com.br { 24113223Sodanrc@yahoo.com.br return (status & BlkHWPrefetched) != 0; 24213223Sodanrc@yahoo.com.br } 24313223Sodanrc@yahoo.com.br 24413223Sodanrc@yahoo.com.br /** 24513223Sodanrc@yahoo.com.br * Check if this block holds data from the secure memory space. 24613223Sodanrc@yahoo.com.br * @return True if the block holds data from the secure memory space. 24713223Sodanrc@yahoo.com.br */ 24813223Sodanrc@yahoo.com.br bool isSecure() const 24913223Sodanrc@yahoo.com.br { 25013223Sodanrc@yahoo.com.br return (status & BlkSecure) != 0; 25113223Sodanrc@yahoo.com.br } 25213223Sodanrc@yahoo.com.br 25313223Sodanrc@yahoo.com.br /** 25413445Sodanrc@yahoo.com.br * Set valid bit. 25513445Sodanrc@yahoo.com.br */ 25613445Sodanrc@yahoo.com.br virtual void setValid() 25713445Sodanrc@yahoo.com.br { 25813445Sodanrc@yahoo.com.br assert(!isValid()); 25913445Sodanrc@yahoo.com.br status |= BlkValid; 26013445Sodanrc@yahoo.com.br } 26113445Sodanrc@yahoo.com.br 26213445Sodanrc@yahoo.com.br /** 26313445Sodanrc@yahoo.com.br * Set secure bit. 26413445Sodanrc@yahoo.com.br */ 26513445Sodanrc@yahoo.com.br virtual void setSecure() 26613445Sodanrc@yahoo.com.br { 26713445Sodanrc@yahoo.com.br status |= BlkSecure; 26813445Sodanrc@yahoo.com.br } 26913445Sodanrc@yahoo.com.br 27013445Sodanrc@yahoo.com.br /** 27113477Sodanrc@yahoo.com.br * Get tick at which block's data will be available for access. 27213477Sodanrc@yahoo.com.br * 27313477Sodanrc@yahoo.com.br * @return Data ready tick. 27413477Sodanrc@yahoo.com.br */ 27513477Sodanrc@yahoo.com.br Tick getWhenReady() const 27613477Sodanrc@yahoo.com.br { 27713477Sodanrc@yahoo.com.br return whenReady; 27813477Sodanrc@yahoo.com.br } 27913477Sodanrc@yahoo.com.br 28013477Sodanrc@yahoo.com.br /** 28113477Sodanrc@yahoo.com.br * Set tick at which block's data will be available for access. The new 28213477Sodanrc@yahoo.com.br * tick must be chronologically sequential with respect to previous 28313477Sodanrc@yahoo.com.br * accesses. 28413477Sodanrc@yahoo.com.br * 28513477Sodanrc@yahoo.com.br * @param tick New data ready tick. 28613477Sodanrc@yahoo.com.br */ 28713477Sodanrc@yahoo.com.br void setWhenReady(const Tick tick) 28813477Sodanrc@yahoo.com.br { 28913477Sodanrc@yahoo.com.br assert(tick >= tickInserted); 29013477Sodanrc@yahoo.com.br whenReady = tick; 29113477Sodanrc@yahoo.com.br } 29213477Sodanrc@yahoo.com.br 29313477Sodanrc@yahoo.com.br /** 29413223Sodanrc@yahoo.com.br * Set member variables when a block insertion occurs. Resets reference 29513223Sodanrc@yahoo.com.br * count to 1 (the insertion counts as a reference), and touch block if 29613223Sodanrc@yahoo.com.br * it hadn't been touched previously. Sets the insertion tick to the 29713445Sodanrc@yahoo.com.br * current tick. Marks the block valid. 29813223Sodanrc@yahoo.com.br * 29913223Sodanrc@yahoo.com.br * @param tag Block address tag. 30013223Sodanrc@yahoo.com.br * @param is_secure Whether the block is in secure space or not. 30113223Sodanrc@yahoo.com.br * @param src_master_ID The source requestor ID. 30213223Sodanrc@yahoo.com.br * @param task_ID The new task ID. 30313223Sodanrc@yahoo.com.br */ 30413223Sodanrc@yahoo.com.br virtual void insert(const Addr tag, const bool is_secure, 30513223Sodanrc@yahoo.com.br const int src_master_ID, const uint32_t task_ID); 30613223Sodanrc@yahoo.com.br 30713223Sodanrc@yahoo.com.br /** 30813223Sodanrc@yahoo.com.br * Track the fact that a local locked was issued to the 30913223Sodanrc@yahoo.com.br * block. Invalidate any previous LL to the same address. 31013223Sodanrc@yahoo.com.br */ 31113223Sodanrc@yahoo.com.br void trackLoadLocked(PacketPtr pkt) 31213223Sodanrc@yahoo.com.br { 31313223Sodanrc@yahoo.com.br assert(pkt->isLLSC()); 31413223Sodanrc@yahoo.com.br auto l = lockList.begin(); 31513223Sodanrc@yahoo.com.br while (l != lockList.end()) { 31613223Sodanrc@yahoo.com.br if (l->intersects(pkt->req)) 31713223Sodanrc@yahoo.com.br l = lockList.erase(l); 31813223Sodanrc@yahoo.com.br else 31913223Sodanrc@yahoo.com.br ++l; 32013223Sodanrc@yahoo.com.br } 32113223Sodanrc@yahoo.com.br 32213223Sodanrc@yahoo.com.br lockList.emplace_front(pkt->req); 32313223Sodanrc@yahoo.com.br } 32413223Sodanrc@yahoo.com.br 32513223Sodanrc@yahoo.com.br /** 32613223Sodanrc@yahoo.com.br * Clear the any load lock that intersect the request, and is from 32713223Sodanrc@yahoo.com.br * a different context. 32813223Sodanrc@yahoo.com.br */ 32913223Sodanrc@yahoo.com.br void clearLoadLocks(const RequestPtr &req) 33013223Sodanrc@yahoo.com.br { 33113223Sodanrc@yahoo.com.br auto l = lockList.begin(); 33213223Sodanrc@yahoo.com.br while (l != lockList.end()) { 33313223Sodanrc@yahoo.com.br if (l->intersects(req) && l->contextId != req->contextId()) { 33413223Sodanrc@yahoo.com.br l = lockList.erase(l); 33513223Sodanrc@yahoo.com.br } else { 33613223Sodanrc@yahoo.com.br ++l; 33713223Sodanrc@yahoo.com.br } 33813223Sodanrc@yahoo.com.br } 33913223Sodanrc@yahoo.com.br } 34013223Sodanrc@yahoo.com.br 34113223Sodanrc@yahoo.com.br /** 34213223Sodanrc@yahoo.com.br * Pretty-print tag, set and way, and interpret state bits to readable form 34313223Sodanrc@yahoo.com.br * including mapping to a MOESI state. 34413223Sodanrc@yahoo.com.br * 34513223Sodanrc@yahoo.com.br * @return string with basic state information 34613223Sodanrc@yahoo.com.br */ 34713223Sodanrc@yahoo.com.br virtual std::string print() const 34813223Sodanrc@yahoo.com.br { 34913223Sodanrc@yahoo.com.br /** 35013223Sodanrc@yahoo.com.br * state M O E S I 35113223Sodanrc@yahoo.com.br * writable 1 0 1 0 0 35213223Sodanrc@yahoo.com.br * dirty 1 1 0 0 0 35313223Sodanrc@yahoo.com.br * valid 1 1 1 1 0 35413223Sodanrc@yahoo.com.br * 35513223Sodanrc@yahoo.com.br * state writable dirty valid 35613223Sodanrc@yahoo.com.br * M 1 1 1 35713223Sodanrc@yahoo.com.br * O 0 1 1 35813223Sodanrc@yahoo.com.br * E 1 0 1 35913223Sodanrc@yahoo.com.br * S 0 0 1 36013223Sodanrc@yahoo.com.br * I 0 0 0 36113223Sodanrc@yahoo.com.br * 36213223Sodanrc@yahoo.com.br * Note that only one cache ever has a block in Modified or 36313223Sodanrc@yahoo.com.br * Owned state, i.e., only one cache owns the block, or 36413223Sodanrc@yahoo.com.br * equivalently has the BlkDirty bit set. However, multiple 36513223Sodanrc@yahoo.com.br * caches on the same path to memory can have a block in the 36613223Sodanrc@yahoo.com.br * Exclusive state (despite the name). Exclusive means this 36713223Sodanrc@yahoo.com.br * cache has the only copy at this level of the hierarchy, 36813223Sodanrc@yahoo.com.br * i.e., there may be copies in caches above this cache (in 36913223Sodanrc@yahoo.com.br * various states), but there are no peers that have copies on 37013223Sodanrc@yahoo.com.br * this branch of the hierarchy, and no caches at or above 37113223Sodanrc@yahoo.com.br * this level on any other branch have copies either. 37213223Sodanrc@yahoo.com.br **/ 37313223Sodanrc@yahoo.com.br unsigned state = isWritable() << 2 | isDirty() << 1 | isValid(); 37413223Sodanrc@yahoo.com.br char s = '?'; 37513223Sodanrc@yahoo.com.br switch (state) { 37613223Sodanrc@yahoo.com.br case 0b111: s = 'M'; break; 37713223Sodanrc@yahoo.com.br case 0b011: s = 'O'; break; 37813223Sodanrc@yahoo.com.br case 0b101: s = 'E'; break; 37913223Sodanrc@yahoo.com.br case 0b001: s = 'S'; break; 38013223Sodanrc@yahoo.com.br case 0b000: s = 'I'; break; 38113223Sodanrc@yahoo.com.br default: s = 'T'; break; // @TODO add other types 38213223Sodanrc@yahoo.com.br } 38313223Sodanrc@yahoo.com.br return csprintf("state: %x (%c) valid: %d writable: %d readable: %d " 38413223Sodanrc@yahoo.com.br "dirty: %d | tag: %#x set: %#x way: %#x", status, s, 38513223Sodanrc@yahoo.com.br isValid(), isWritable(), isReadable(), isDirty(), tag, 38613223Sodanrc@yahoo.com.br getSet(), getWay()); 38713223Sodanrc@yahoo.com.br } 38813223Sodanrc@yahoo.com.br 38913223Sodanrc@yahoo.com.br /** 39013223Sodanrc@yahoo.com.br * Handle interaction of load-locked operations and stores. 39113223Sodanrc@yahoo.com.br * @return True if write should proceed, false otherwise. Returns 39213223Sodanrc@yahoo.com.br * false only in the case of a failed store conditional. 39313223Sodanrc@yahoo.com.br */ 39413223Sodanrc@yahoo.com.br bool checkWrite(PacketPtr pkt) 39513223Sodanrc@yahoo.com.br { 39613223Sodanrc@yahoo.com.br assert(pkt->isWrite()); 39713223Sodanrc@yahoo.com.br 39813223Sodanrc@yahoo.com.br // common case 39913223Sodanrc@yahoo.com.br if (!pkt->isLLSC() && lockList.empty()) 40013223Sodanrc@yahoo.com.br return true; 40113223Sodanrc@yahoo.com.br 40213223Sodanrc@yahoo.com.br const RequestPtr &req = pkt->req; 40313223Sodanrc@yahoo.com.br 40413223Sodanrc@yahoo.com.br if (pkt->isLLSC()) { 40513223Sodanrc@yahoo.com.br // it's a store conditional... have to check for matching 40613223Sodanrc@yahoo.com.br // load locked. 40713223Sodanrc@yahoo.com.br bool success = false; 40813223Sodanrc@yahoo.com.br 40913223Sodanrc@yahoo.com.br auto l = lockList.begin(); 41013223Sodanrc@yahoo.com.br while (!success && l != lockList.end()) { 41113223Sodanrc@yahoo.com.br if (l->matches(pkt->req)) { 41213223Sodanrc@yahoo.com.br // it's a store conditional, and as far as the 41313223Sodanrc@yahoo.com.br // memory system can tell, the requesting 41413223Sodanrc@yahoo.com.br // context's lock is still valid. 41513223Sodanrc@yahoo.com.br success = true; 41613223Sodanrc@yahoo.com.br lockList.erase(l); 41713223Sodanrc@yahoo.com.br } else { 41813223Sodanrc@yahoo.com.br ++l; 41913223Sodanrc@yahoo.com.br } 42013223Sodanrc@yahoo.com.br } 42113223Sodanrc@yahoo.com.br 42213223Sodanrc@yahoo.com.br req->setExtraData(success ? 1 : 0); 42313223Sodanrc@yahoo.com.br // clear any intersected locks from other contexts (our LL 42413223Sodanrc@yahoo.com.br // should already have cleared them) 42513223Sodanrc@yahoo.com.br clearLoadLocks(req); 42613223Sodanrc@yahoo.com.br return success; 42713223Sodanrc@yahoo.com.br } else { 42813223Sodanrc@yahoo.com.br // a normal write, if there is any lock not from this 42913223Sodanrc@yahoo.com.br // context we clear the list, thus for a private cache we 43013223Sodanrc@yahoo.com.br // never clear locks on normal writes 43113223Sodanrc@yahoo.com.br clearLoadLocks(req); 43213223Sodanrc@yahoo.com.br return true; 43313223Sodanrc@yahoo.com.br } 43413223Sodanrc@yahoo.com.br } 43513223Sodanrc@yahoo.com.br}; 43613223Sodanrc@yahoo.com.br 43713223Sodanrc@yahoo.com.br/** 43813223Sodanrc@yahoo.com.br * Special instance of CacheBlk for use with tempBlk that deals with its 43913223Sodanrc@yahoo.com.br * block address regeneration. 44013223Sodanrc@yahoo.com.br * @sa Cache 44113223Sodanrc@yahoo.com.br */ 44213223Sodanrc@yahoo.com.brclass TempCacheBlk final : public CacheBlk 44313223Sodanrc@yahoo.com.br{ 44413223Sodanrc@yahoo.com.br private: 44513223Sodanrc@yahoo.com.br /** 44613223Sodanrc@yahoo.com.br * Copy of the block's address, used to regenerate tempBlock's address. 44713223Sodanrc@yahoo.com.br */ 44813223Sodanrc@yahoo.com.br Addr _addr; 44913223Sodanrc@yahoo.com.br 45013223Sodanrc@yahoo.com.br public: 45113223Sodanrc@yahoo.com.br /** 45213223Sodanrc@yahoo.com.br * Creates a temporary cache block, with its own storage. 45313223Sodanrc@yahoo.com.br * @param size The size (in bytes) of this cache block. 45413223Sodanrc@yahoo.com.br */ 45513223Sodanrc@yahoo.com.br TempCacheBlk(unsigned size) : CacheBlk() 45613223Sodanrc@yahoo.com.br { 45713223Sodanrc@yahoo.com.br data = new uint8_t[size]; 45813223Sodanrc@yahoo.com.br } 45913223Sodanrc@yahoo.com.br TempCacheBlk(const TempCacheBlk&) = delete; 46013223Sodanrc@yahoo.com.br TempCacheBlk& operator=(const TempCacheBlk&) = delete; 46113223Sodanrc@yahoo.com.br ~TempCacheBlk() { delete [] data; }; 46213223Sodanrc@yahoo.com.br 46313223Sodanrc@yahoo.com.br /** 46413223Sodanrc@yahoo.com.br * Invalidate the block and clear all state. 46513223Sodanrc@yahoo.com.br */ 46613223Sodanrc@yahoo.com.br void invalidate() override { 46713223Sodanrc@yahoo.com.br CacheBlk::invalidate(); 46813223Sodanrc@yahoo.com.br 46913223Sodanrc@yahoo.com.br _addr = MaxAddr; 47013223Sodanrc@yahoo.com.br } 47113223Sodanrc@yahoo.com.br 47213223Sodanrc@yahoo.com.br void insert(const Addr addr, const bool is_secure, 47313223Sodanrc@yahoo.com.br const int src_master_ID=0, const uint32_t task_ID=0) override 47413223Sodanrc@yahoo.com.br { 47513445Sodanrc@yahoo.com.br // Make sure that the block has been properly invalidated 47613445Sodanrc@yahoo.com.br assert(status == 0); 47713445Sodanrc@yahoo.com.br 47813223Sodanrc@yahoo.com.br // Set block address 47913223Sodanrc@yahoo.com.br _addr = addr; 48013223Sodanrc@yahoo.com.br 48113223Sodanrc@yahoo.com.br // Set secure state 48213223Sodanrc@yahoo.com.br if (is_secure) { 48313445Sodanrc@yahoo.com.br setSecure(); 48413223Sodanrc@yahoo.com.br } 48513445Sodanrc@yahoo.com.br 48613445Sodanrc@yahoo.com.br // Validate block 48713445Sodanrc@yahoo.com.br setValid(); 48813223Sodanrc@yahoo.com.br } 48913223Sodanrc@yahoo.com.br 49013223Sodanrc@yahoo.com.br /** 49113223Sodanrc@yahoo.com.br * Get block's address. 49213223Sodanrc@yahoo.com.br * 49313223Sodanrc@yahoo.com.br * @return addr Address value. 49413223Sodanrc@yahoo.com.br */ 49513223Sodanrc@yahoo.com.br Addr getAddr() const 49613223Sodanrc@yahoo.com.br { 49713223Sodanrc@yahoo.com.br return _addr; 49813223Sodanrc@yahoo.com.br } 49913223Sodanrc@yahoo.com.br}; 50013223Sodanrc@yahoo.com.br 50113223Sodanrc@yahoo.com.br/** 50213223Sodanrc@yahoo.com.br * Simple class to provide virtual print() method on cache blocks 50313223Sodanrc@yahoo.com.br * without allocating a vtable pointer for every single cache block. 50413223Sodanrc@yahoo.com.br * Just wrap the CacheBlk object in an instance of this before passing 50513223Sodanrc@yahoo.com.br * to a function that requires a Printable object. 50613223Sodanrc@yahoo.com.br */ 50713223Sodanrc@yahoo.com.brclass CacheBlkPrintWrapper : public Printable 50813223Sodanrc@yahoo.com.br{ 50913223Sodanrc@yahoo.com.br CacheBlk *blk; 51013223Sodanrc@yahoo.com.br public: 51113223Sodanrc@yahoo.com.br CacheBlkPrintWrapper(CacheBlk *_blk) : blk(_blk) {} 51213223Sodanrc@yahoo.com.br virtual ~CacheBlkPrintWrapper() {} 51313223Sodanrc@yahoo.com.br void print(std::ostream &o, int verbosity = 0, 51413223Sodanrc@yahoo.com.br const std::string &prefix = "") const; 51513223Sodanrc@yahoo.com.br}; 51613223Sodanrc@yahoo.com.br 51713223Sodanrc@yahoo.com.br#endif //__MEM_CACHE_CACHE_BLK_HH__ 518