smmu_v3_cmdexec.cc revision 14039:4991b2a345a1
12SN/A/* 21762SN/A * Copyright (c) 2013, 2018-2019 ARM Limited 32SN/A * All rights reserved 42SN/A * 52SN/A * The license below extends only to copyright in the software and shall 62SN/A * not be construed as granting a license to any other intellectual 72SN/A * property including but not limited to intellectual property relating 82SN/A * to a hardware implementation of the functionality of the software 92SN/A * licensed hereunder. You may use the software subject to the license 102SN/A * terms below provided that you ensure that this notice is replicated 112SN/A * unmodified and in its entirety in all distributions of the software, 122SN/A * modified or unmodified, in source code or in binary form. 132SN/A * 142SN/A * Redistribution and use in source and binary forms, with or without 152SN/A * modification, are permitted provided that the following conditions are 162SN/A * met: redistributions of source code must retain the above copyright 172SN/A * notice, this list of conditions and the following disclaimer; 182SN/A * redistributions in binary form must reproduce the above copyright 192SN/A * notice, this list of conditions and the following disclaimer in the 202SN/A * documentation and/or other materials provided with the distribution; 212SN/A * neither the name of the copyright holders nor the names of its 222SN/A * contributors may be used to endorse or promote products derived from 232SN/A * this software without specific prior written permission. 242SN/A * 252SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 262SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 272665SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 282665SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 292665SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 302665SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 312665SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 322SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 332SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 341722SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 355480Snate@binkert.org * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 362SN/A * 372SN/A * Authors: Stan Czerniawski 38146SN/A */ 392SN/A 402SN/A#include "dev/arm/smmu_v3_cmdexec.hh" 412158SN/A 42146SN/A#include "base/bitfield.hh" 431805SN/A#include "dev/arm/smmu_v3.hh" 44146SN/A 451717SN/Avoid 462680SN/ASMMUCommandExecProcess::main(Yield &yield) 478232Snate@binkert.org{ 485480Snate@binkert.org SMMUAction a; 498741Sgblack@eecs.umich.edu a.type = ACTION_INITIAL_NOP; 508741Sgblack@eecs.umich.edu a.pkt = NULL; 518741Sgblack@eecs.umich.edu a.ifc = nullptr; 522521SN/A a.delay = 0; 5356SN/A yield(a); 545478SN/A 553348SN/A while (true) { 563348SN/A busy = true; 572521SN/A 585480Snate@binkert.org while (true) { 591805SN/A int sizeMask = 602SN/A mask(smmu.regs.cmdq_base & Q_BASE_SIZE_MASK) & Q_CONS_PROD_MASK; 612SN/A 622107SN/A if ((smmu.regs.cmdq_cons & sizeMask) == 632SN/A (smmu.regs.cmdq_prod & sizeMask)) 645480Snate@binkert.org break; // command queue empty 655478SN/A 668806Sgblack@eecs.umich.edu Addr cmdAddr = 672SN/A (smmu.regs.cmdq_base & Q_BASE_ADDR_MASK) + 68545SN/A (smmu.regs.cmdq_cons & sizeMask) * sizeof(SMMUCommand); 692521SN/A 702521SN/A // This deliberately resets the error field in cmdq_cons! 712521SN/A smmu.regs.cmdq_cons = (smmu.regs.cmdq_cons + 1) & sizeMask; 722521SN/A 732SN/A doRead(yield, cmdAddr, &cmd, sizeof(SMMUCommand)); 742SN/A smmu.processCommand(cmd); 752SN/A } 76926SN/A 77926SN/A busy = false; 78926SN/A 79926SN/A doSleep(yield); 80926SN/A } 81926SN/A} 82926SN/A