mmapped_ipr.cc revision 9897
13569Sgblack@eecs.umich.edu/* 23569Sgblack@eecs.umich.edu * Copyright (c) 2013 Andreas Sandberg 33569Sgblack@eecs.umich.edu * All rights reserved. 43569Sgblack@eecs.umich.edu * 53569Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 63569Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 73569Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 83569Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 93569Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 103569Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 113569Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 123569Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 133569Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 143569Sgblack@eecs.umich.edu * this software without specific prior written permission. 153569Sgblack@eecs.umich.edu * 163569Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 173569Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 183569Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 193569Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 203569Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 213569Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 223569Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 233569Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 243569Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 253569Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 263569Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 273569Sgblack@eecs.umich.edu * 283804Ssaidi@eecs.umich.edu * Authors: Andreas Sandberg 293569Sgblack@eecs.umich.edu */ 303569Sgblack@eecs.umich.edu 313804Ssaidi@eecs.umich.edu#include "arch/generic/mmapped_ipr.hh" 323811Ssaidi@eecs.umich.edu#include "mem/packet.hh" 333569Sgblack@eecs.umich.edu#include "mem/packet_access.hh" 343824Ssaidi@eecs.umich.edu#include "sim/pseudo_inst.hh" 353811Ssaidi@eecs.umich.edu 363811Ssaidi@eecs.umich.eduusing namespace GenericISA; 373823Ssaidi@eecs.umich.edu 383823Ssaidi@eecs.umich.edustatic void 393823Ssaidi@eecs.umich.eduhandlePseudoInst(ThreadContext *xc, Packet *pkt) 403569Sgblack@eecs.umich.edu{ 413569Sgblack@eecs.umich.edu const Addr offset(pkt->getAddr() & IPR_IN_CLASS_MASK); 423804Ssaidi@eecs.umich.edu const uint8_t func((offset >> 8) & 0xFF); 433804Ssaidi@eecs.umich.edu const uint8_t subfunc(offset & 0xFF); 443569Sgblack@eecs.umich.edu uint64_t ret; 453569Sgblack@eecs.umich.edu 463569Sgblack@eecs.umich.edu assert((offset >> 16) == 0); 473804Ssaidi@eecs.umich.edu ret = PseudoInst::pseudoInst(xc, func, subfunc); 483836Ssaidi@eecs.umich.edu if (pkt->isRead()) 493804Ssaidi@eecs.umich.edu pkt->set(ret); 503804Ssaidi@eecs.umich.edu} 513804Ssaidi@eecs.umich.edu 523804Ssaidi@eecs.umich.eduCycles 533569Sgblack@eecs.umich.eduGenericISA::handleGenericIprRead(ThreadContext *xc, Packet *pkt) 543804Ssaidi@eecs.umich.edu{ 553804Ssaidi@eecs.umich.edu Addr va(pkt->getAddr()); 563804Ssaidi@eecs.umich.edu Addr cls((va & IPR_CLASS_MASK) >> IPR_CLASS_SHIFT); 573569Sgblack@eecs.umich.edu 583804Ssaidi@eecs.umich.edu switch (cls) { 593804Ssaidi@eecs.umich.edu case IPR_CLASS_PSEUDO_INST: 603804Ssaidi@eecs.umich.edu handlePseudoInst(xc, pkt); 613804Ssaidi@eecs.umich.edu break; 623804Ssaidi@eecs.umich.edu default: 633804Ssaidi@eecs.umich.edu panic("Unhandled generic IPR read: 0x%x\n", va); 643804Ssaidi@eecs.umich.edu } 653804Ssaidi@eecs.umich.edu 663804Ssaidi@eecs.umich.edu return Cycles(1); 673804Ssaidi@eecs.umich.edu} 683804Ssaidi@eecs.umich.edu 693804Ssaidi@eecs.umich.eduCycles 703569Sgblack@eecs.umich.eduGenericISA::handleGenericIprWrite(ThreadContext *xc, Packet *pkt) 713569Sgblack@eecs.umich.edu{ 723804Ssaidi@eecs.umich.edu Addr va(pkt->getAddr()); 733804Ssaidi@eecs.umich.edu Addr cls((va & IPR_CLASS_MASK) >> IPR_CLASS_SHIFT); 743826Ssaidi@eecs.umich.edu 753804Ssaidi@eecs.umich.edu switch (cls) { 763569Sgblack@eecs.umich.edu case IPR_CLASS_PSEUDO_INST: 773569Sgblack@eecs.umich.edu handlePseudoInst(xc, pkt); 783804Ssaidi@eecs.umich.edu break; 793826Ssaidi@eecs.umich.edu default: 803826Ssaidi@eecs.umich.edu panic("Unhandled generic IPR write: 0x%x\n", va); 813811Ssaidi@eecs.umich.edu } 823836Ssaidi@eecs.umich.edu 833836Ssaidi@eecs.umich.edu return Cycles(1); 843826Ssaidi@eecs.umich.edu} 853826Ssaidi@eecs.umich.edu