system.hh revision 10810:683ab55819fd
1/* 2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by the University of Cambridge Computer 6 * Laboratory as part of the CTSRD Project, with support from the UK Higher 7 * Education Innovation Fund (HEIF). 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are 11 * met: redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer; 13 * redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution; 16 * neither the name of the copyright holders nor the names of its 17 * contributors may be used to endorse or promote products derived from 18 * this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#ifndef __ARCH_ARM_FREEBSD_SYSTEM_HH__ 34#define __ARCH_ARM_FREEBSD_SYSTEM_HH__ 35 36#include <cstdio> 37#include <map> 38#include <string> 39#include <vector> 40 41#include "arch/arm/system.hh" 42#include "base/output.hh" 43#include "kern/freebsd/events.hh" 44#include "params/FreebsdArmSystem.hh" 45#include "sim/core.hh" 46 47class DumpStatsPCEventF; 48 49class FreebsdArmSystem : public GenericArmSystem 50{ 51 protected: 52 DumpStatsPCEventF *dumpStatsPCEventF; 53 54 public: 55 /** Boilerplate params code */ 56 typedef FreebsdArmSystemParams Params; 57 const Params * 58 params() const 59 { 60 return dynamic_cast<const Params *>(_params); 61 } 62 63 /** When enabled, dump stats/task info on context switches for 64 * Streamline and per-thread cache occupancy studies, etc. */ 65 bool enableContextSwitchStatsDump; 66 67 /** This map stores a mapping of OS process IDs to internal Task IDs. The 68 * mapping is done because the stats system doesn't tend to like vectors 69 * that are much greater than 1000 items and the entire process space is 70 * 65K. */ 71 std::map<uint32_t, uint32_t> taskMap; 72 73 /** This is a file that is placed in the run directory that prints out 74 * mappings between taskIds and OS process IDs */ 75 std::ostream* taskFile; 76 77 FreebsdArmSystem(Params *p); 78 ~FreebsdArmSystem(); 79 80 void initState(); 81 82 bool adderBootUncacheable(Addr a); 83 84 void startup(); 85 86 /** This function creates a new task Id for the given pid. 87 * @param tc thread context that is currentyl executing */ 88 void mapPid(ThreadContext* tc, uint32_t pid); 89 90 private: 91 /** Event to halt the simulator if the kernel calls panic() */ 92 PCEvent *kernelPanicEvent; 93 94 /** Event to halt the simulator if the kernel calls oopses */ 95 PCEvent *kernelOopsEvent; 96 97 /** 98 * PC based event to skip udelay(<time>) calls and quiesce the 99 * processor for the appropriate amount of time. This is not functionally 100 * required but does speed up simulation. 101 */ 102 FreeBSD::UDelayEvent *uDelaySkipEvent; 103 104 /** Another PC based skip event for const_udelay(). Similar to the udelay 105 * skip, but this function precomputes the first multiply that is done 106 * in the generic case since the parameter is known at compile time. 107 * Thus we need to do some division to get back to us. 108 */ 109 FreeBSD::UDelayEvent *constUDelaySkipEvent; 110 111 /** These variables store addresses of important data structures 112 * that are normaly kept coherent at boot with cache mainetence operations. 113 * Since these operations aren't supported in gem5, we keep them coherent 114 * by making them uncacheable until all processors in the system boot. 115 */ 116 Addr secDataPtrAddr; 117 Addr secDataAddr; 118 Addr penReleaseAddr; 119 Addr pen64ReleaseAddr; 120 Addr bootReleaseAddr; 121}; 122 123class DumpStatsPCEventF : public PCEvent 124{ 125 public: 126 DumpStatsPCEventF(PCEventQueue *q, const std::string &desc, Addr addr) 127 : PCEvent(q, desc, addr) 128 {} 129 130 virtual void process(ThreadContext* tc); 131}; 132 133 134#endif // __ARCH_ARM_FREEBSD_SYSTEM_HH__ 135 136