system.cc revision 5254
15222Sksewell@umich.edu/* 25254Sksewell@umich.edu * Copyright (c) 2007 MIPS Technologies, Inc. 35254Sksewell@umich.edu * All rights reserved. 45222Sksewell@umich.edu * 55254Sksewell@umich.edu * Redistribution and use in source and binary forms, with or without 65254Sksewell@umich.edu * modification, are permitted provided that the following conditions are 75254Sksewell@umich.edu * met: redistributions of source code must retain the above copyright 85254Sksewell@umich.edu * notice, this list of conditions and the following disclaimer; 95254Sksewell@umich.edu * redistributions in binary form must reproduce the above copyright 105254Sksewell@umich.edu * notice, this list of conditions and the following disclaimer in the 115254Sksewell@umich.edu * documentation and/or other materials provided with the distribution; 125254Sksewell@umich.edu * neither the name of the copyright holders nor the names of its 135254Sksewell@umich.edu * contributors may be used to endorse or promote products derived from 145254Sksewell@umich.edu * this software without specific prior written permission. 155222Sksewell@umich.edu * 165254Sksewell@umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175254Sksewell@umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185254Sksewell@umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195254Sksewell@umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205254Sksewell@umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215254Sksewell@umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225254Sksewell@umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235254Sksewell@umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245254Sksewell@umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255254Sksewell@umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265254Sksewell@umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275222Sksewell@umich.edu * 285254Sksewell@umich.edu * Authors: Ali Saidi 295254Sksewell@umich.edu * Nathan Binkert 305222Sksewell@umich.edu * Jaidev Patwardhan 315222Sksewell@umich.edu */ 325222Sksewell@umich.edu 335222Sksewell@umich.edu#include "arch/mips/system.hh" 345222Sksewell@umich.edu#include "arch/vtophys.hh" 355222Sksewell@umich.edu#include "base/remote_gdb.hh" 365222Sksewell@umich.edu#include "base/loader/object_file.hh" 375222Sksewell@umich.edu#include "base/loader/hex_file.hh" 385222Sksewell@umich.edu#include "base/loader/symtab.hh" 395222Sksewell@umich.edu#include "base/trace.hh" 405222Sksewell@umich.edu#include "mem/physical.hh" 415222Sksewell@umich.edu#include "params/MipsSystem.hh" 425222Sksewell@umich.edu#include "sim/byteswap.hh" 435222Sksewell@umich.edu 445222Sksewell@umich.edu 455222Sksewell@umich.eduusing namespace LittleEndianGuest; 465222Sksewell@umich.edu 475222Sksewell@umich.eduMipsSystem::MipsSystem(Params *p) 485222Sksewell@umich.edu : System(p) 495222Sksewell@umich.edu{ 505222Sksewell@umich.edu 515222Sksewell@umich.edu#if FULL_SYSTEM 525222Sksewell@umich.edu if (p->bare_iron == true) { 535222Sksewell@umich.edu hexFile = new HexFile(params()->hex_file_name); 545222Sksewell@umich.edu if(!hexFile->loadSections(&functionalPort,MipsISA::LoadAddrMask)) 555222Sksewell@umich.edu panic("Could not load hex file\n"); 565222Sksewell@umich.edu } 575222Sksewell@umich.edu 585222Sksewell@umich.edu Addr addr = 0; 595222Sksewell@umich.edu /* Comment out old Alpha Based Code 605222Sksewell@umich.edu 615222Sksewell@umich.edu Don't need the console before we start looking at booting linux */ 625222Sksewell@umich.edu 635222Sksewell@umich.edu 645222Sksewell@umich.edu consoleSymtab = new SymbolTable; 655222Sksewell@umich.edu 665222Sksewell@umich.edu 675222Sksewell@umich.edu /** 685222Sksewell@umich.edu * Load the console code into memory 695222Sksewell@umich.edu */ 705222Sksewell@umich.edu // Load Console Code 715222Sksewell@umich.edu console = createObjectFile(params()->console); 725222Sksewell@umich.edu 735222Sksewell@umich.edu warn("console code is located at: %s\n", params()->console); 745222Sksewell@umich.edu 755222Sksewell@umich.edu if (console == NULL) 765222Sksewell@umich.edu fatal("Could not load console file %s", params()->console); 775222Sksewell@umich.edu //Load program sections into memory 785222Sksewell@umich.edu console->loadSections(&functionalPort, MipsISA::LoadAddrMask); 795222Sksewell@umich.edu 805222Sksewell@umich.edu //load symbols 815222Sksewell@umich.edu if (!console->loadGlobalSymbols(consoleSymtab)) 825222Sksewell@umich.edu panic("could not load console symbols\n"); 835222Sksewell@umich.edu 845222Sksewell@umich.edu if (!console->loadGlobalSymbols(debugSymbolTable)) 855222Sksewell@umich.edu panic("could not load console symbols\n"); 865222Sksewell@umich.edu 875222Sksewell@umich.edu 885222Sksewell@umich.edu#ifndef NDEBUG 895222Sksewell@umich.edu consolePanicEvent = addConsoleFuncEvent<BreakPCEvent>("panic"); 905222Sksewell@umich.edu#endif 915222Sksewell@umich.edu 925222Sksewell@umich.edu /** 935222Sksewell@umich.edu * Copy the osflags (kernel arguments) into the consoles 945222Sksewell@umich.edu * memory. (Presently Linux does not use the console service 955222Sksewell@umich.edu * routine to get these command line arguments, but Tru64 and 965222Sksewell@umich.edu * others do.) 975222Sksewell@umich.edu */ 985222Sksewell@umich.edu if (consoleSymtab->findAddress("env_booted_osflags", addr)) { 995222Sksewell@umich.edu warn("writing addr starting from %#x", addr); 1005222Sksewell@umich.edu cout << "-" << endl; 1015222Sksewell@umich.edu virtPort.writeBlob(addr, (uint8_t*)params()->boot_osflags.c_str(), 1025222Sksewell@umich.edu strlen(params()->boot_osflags.c_str())); 1035222Sksewell@umich.edu } 1045222Sksewell@umich.edu 1055222Sksewell@umich.edu /** 1065222Sksewell@umich.edu * Set the hardware reset parameter block system type and revision 1075222Sksewell@umich.edu * information to Tsunami. 1085222Sksewell@umich.edu */ 1095222Sksewell@umich.edu if (consoleSymtab->findAddress("m5_rpb", addr)) { 1105222Sksewell@umich.edu uint64_t data; 1115222Sksewell@umich.edu data = htog(params()->system_type); 1125222Sksewell@umich.edu virtPort.write(addr+0x50, data); 1135222Sksewell@umich.edu data = htog(params()->system_rev); 1145222Sksewell@umich.edu virtPort.write(addr+0x58, data); 1155222Sksewell@umich.edu } else 1165222Sksewell@umich.edu panic("could not find hwrpb\n"); 1175222Sksewell@umich.edu#endif 1185222Sksewell@umich.edu} 1195222Sksewell@umich.edu 1205222Sksewell@umich.eduMipsSystem::~MipsSystem() 1215222Sksewell@umich.edu{ 1225222Sksewell@umich.edu} 1235222Sksewell@umich.edu#if FULL_SYSTEM 1245222Sksewell@umich.edu/** 1255222Sksewell@umich.edu * This function fixes up addresses that are used to match PCs for 1265222Sksewell@umich.edu * hooking simulator events on to target function executions. 1275222Sksewell@umich.edu * 1285222Sksewell@umich.edu * Mips binaries may have multiple global offset table (GOT) 1295222Sksewell@umich.edu * sections. A function that uses the GOT starts with a 1305222Sksewell@umich.edu * two-instruction prolog which sets the global pointer (gp == r29) to 1315222Sksewell@umich.edu * the appropriate GOT section. The proper gp value is calculated 1325222Sksewell@umich.edu * based on the function address, which must be passed by the caller 1335222Sksewell@umich.edu * in the procedure value register (pv aka t12 == r27). This sequence 1345222Sksewell@umich.edu * looks like the following: 1355222Sksewell@umich.edu * 1365222Sksewell@umich.edu * opcode Ra Rb offset 1375222Sksewell@umich.edu * ldah gp,X(pv) 09 29 27 X 1385222Sksewell@umich.edu * lda gp,Y(gp) 08 29 29 Y 1395222Sksewell@umich.edu * 1405222Sksewell@umich.edu * for some constant offsets X and Y. The catch is that the linker 1415222Sksewell@umich.edu * (or maybe even the compiler, I'm not sure) may recognize that the 1425222Sksewell@umich.edu * caller and callee are using the same GOT section, making this 1435222Sksewell@umich.edu * prolog redundant, and modify the call target to skip these 1445222Sksewell@umich.edu * instructions. If we check for execution of the first instruction 1455222Sksewell@umich.edu * of a function (the one the symbol points to) to detect when to skip 1465222Sksewell@umich.edu * it, we'll miss all these modified calls. It might work to 1475222Sksewell@umich.edu * unconditionally check for the third instruction, but not all 1485222Sksewell@umich.edu * functions have this prolog, and there's some chance that those 1495222Sksewell@umich.edu * first two instructions could have undesired consequences. So we do 1505222Sksewell@umich.edu * the Right Thing and pattern-match the first two instructions of the 1515222Sksewell@umich.edu * function to decide where to patch. 1525222Sksewell@umich.edu * 1535222Sksewell@umich.edu * Eventually this code should be moved into an ISA-specific file. 1545222Sksewell@umich.edu */ 1555222Sksewell@umich.edu 1565222Sksewell@umich.eduAddr 1575222Sksewell@umich.eduMipsSystem::fixFuncEventAddr(Addr addr) 1585222Sksewell@umich.edu{ 1595222Sksewell@umich.edu /* 1605222Sksewell@umich.edu // mask for just the opcode, Ra, and Rb fields (not the offset) 1615222Sksewell@umich.edu const uint32_t inst_mask = 0xffff0000; 1625222Sksewell@umich.edu // ldah gp,X(pv): opcode 9, Ra = 29, Rb = 27 1635222Sksewell@umich.edu const uint32_t gp_ldah_pattern = (9 << 26) | (29 << 21) | (27 << 16); 1645222Sksewell@umich.edu // lda gp,Y(gp): opcode 8, Ra = 29, rb = 29 1655222Sksewell@umich.edu const uint32_t gp_lda_pattern = (8 << 26) | (29 << 21) | (29 << 16); 1665222Sksewell@umich.edu 1675222Sksewell@umich.edu uint32_t i1 = virtPort.read<uint32_t>(addr); 1685222Sksewell@umich.edu uint32_t i2 = virtPort.read<uint32_t>(addr + sizeof(MipsISA::MachInst)); 1695222Sksewell@umich.edu 1705222Sksewell@umich.edu if ((i1 & inst_mask) == gp_ldah_pattern && 1715222Sksewell@umich.edu (i2 & inst_mask) == gp_lda_pattern) { 1725222Sksewell@umich.edu Addr new_addr = addr + 2* sizeof(MipsISA::MachInst); 1735222Sksewell@umich.edu DPRINTF(Loader, "fixFuncEventAddr: %p -> %p", addr, new_addr); 1745222Sksewell@umich.edu return new_addr; 1755222Sksewell@umich.edu } else { 1765222Sksewell@umich.edu return addr; 1775222Sksewell@umich.edu }*/ 1785222Sksewell@umich.edu return addr; 1795222Sksewell@umich.edu} 1805222Sksewell@umich.edu 1815222Sksewell@umich.edu 1825222Sksewell@umich.eduvoid 1835222Sksewell@umich.eduMipsSystem::setMipsAccess(Addr access) 1845222Sksewell@umich.edu{ 1855222Sksewell@umich.edu Addr addr = 0; 1865222Sksewell@umich.edu if (consoleSymtab->findAddress("m5MipsAccess", addr)) { 1875222Sksewell@umich.edu // virtPort.write(addr, htog(EV5::Phys2K0Seg(access))); 1885222Sksewell@umich.edu } else 1895222Sksewell@umich.edu panic("could not find m5MipsAccess\n"); 1905222Sksewell@umich.edu } 1915222Sksewell@umich.edu 1925222Sksewell@umich.edu#endif 1935222Sksewell@umich.edu 1945222Sksewell@umich.edubool 1955222Sksewell@umich.eduMipsSystem::breakpoint() 1965222Sksewell@umich.edu{ 1975222Sksewell@umich.edu return 0; 1985222Sksewell@umich.edu // return remoteGDB[0]->trap(MIPS_KENTRY_INT); 1995222Sksewell@umich.edu} 2005222Sksewell@umich.edu 2015222Sksewell@umich.eduvoid 2025222Sksewell@umich.eduMipsSystem::serialize(std::ostream &os) 2035222Sksewell@umich.edu{ 2045222Sksewell@umich.edu System::serialize(os); 2055222Sksewell@umich.edu // consoleSymtab->serialize("console_symtab", os); 2065222Sksewell@umich.edu} 2075222Sksewell@umich.edu 2085222Sksewell@umich.edu 2095222Sksewell@umich.eduvoid 2105222Sksewell@umich.eduMipsSystem::unserialize(Checkpoint *cp, const std::string §ion) 2115222Sksewell@umich.edu{ 2125222Sksewell@umich.edu System::unserialize(cp,section); 2135222Sksewell@umich.edu // consoleSymtab->unserialize("console_symtab", cp, section); 2145222Sksewell@umich.edu} 2155222Sksewell@umich.edu 2165222Sksewell@umich.eduMipsSystem * 2175222Sksewell@umich.eduMipsSystemParams::create() 2185222Sksewell@umich.edu{ 2195222Sksewell@umich.edu return new MipsSystem(this); 2205222Sksewell@umich.edu} 2215222Sksewell@umich.edu 222