system.cc revision 11793:ef606668d247
1/* 2 * Copyright (c) 2010, 2012-2013, 2015 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2002-2006 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ali Saidi 41 */ 42 43#include "arch/arm/system.hh" 44 45#include <iostream> 46 47#include "base/loader/object_file.hh" 48#include "base/loader/symtab.hh" 49#include "cpu/thread_context.hh" 50#include "mem/fs_translating_port_proxy.hh" 51#include "mem/physical.hh" 52#include "sim/full_system.hh" 53 54using namespace std; 55using namespace Linux; 56 57ArmSystem::ArmSystem(Params *p) 58 : System(p), 59 bootLoaders(), bootldr(nullptr), 60 _haveSecurity(p->have_security), 61 _haveLPAE(p->have_lpae), 62 _haveVirtualization(p->have_virtualization), 63 _genericTimer(nullptr), 64 _highestELIs64(p->highest_el_is_64), 65 _resetAddr64(p->reset_addr_64), 66 _physAddrRange64(p->phys_addr_range_64), 67 _haveLargeAsid64(p->have_large_asid_64), 68 multiProc(p->multi_proc) 69{ 70 // Check if the physical address range is valid 71 if (_highestELIs64 && ( 72 _physAddrRange64 < 32 || 73 _physAddrRange64 > 48 || 74 (_physAddrRange64 % 4 != 0 && _physAddrRange64 != 42))) { 75 fatal("Invalid physical address range (%d)\n", _physAddrRange64); 76 } 77 78 bootLoaders.reserve(p->boot_loader.size()); 79 for (const auto &bl : p->boot_loader) { 80 std::unique_ptr<ObjectFile> obj; 81 obj.reset(createObjectFile(bl)); 82 83 fatal_if(!obj, "Could not read bootloader: %s\n", bl); 84 bootLoaders.emplace_back(std::move(obj)); 85 } 86 87 if (kernel) { 88 bootldr = getBootLoader(kernel); 89 } else if (!bootLoaders.empty()) { 90 // No kernel specified, default to the first boot loader 91 bootldr = bootLoaders[0].get(); 92 } 93 94 if (!bootLoaders.empty() && !bootldr) 95 fatal("Can't find a matching boot loader / kernel combination!"); 96 97 if (bootldr) { 98 bootldr->loadGlobalSymbols(debugSymbolTable); 99 if ((bootldr->getArch() == ObjectFile::Arm64) && !_highestELIs64) { 100 warn("Highest ARM exception-level set to AArch32 but bootloader " 101 "is for AArch64. Assuming you wanted these to match.\n"); 102 _highestELIs64 = true; 103 } else if ((bootldr->getArch() == ObjectFile::Arm) && _highestELIs64) { 104 warn("Highest ARM exception-level set to AArch64 but bootloader " 105 "is for AArch32. Assuming you wanted these to match.\n"); 106 _highestELIs64 = false; 107 } 108 } 109 110 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); 111} 112 113void 114ArmSystem::initState() 115{ 116 // Moved from the constructor to here since it relies on the 117 // address map being resolved in the interconnect 118 119 // Call the initialisation of the super class 120 System::initState(); 121 122 const Params* p = params(); 123 124 if (bootldr) { 125 bootldr->loadSections(physProxy); 126 127 uint8_t jump_to_bl_32[] = 128 { 129 0x07, 0xf0, 0xa0, 0xe1 // branch to r7 in aarch32 130 }; 131 132 uint8_t jump_to_bl_64[] = 133 { 134 0xe0, 0x00, 0x1f, 0xd6 // instruction "br x7" in aarch64 135 }; 136 137 // write the jump to branch table into address 0 138 if (!_highestELIs64) 139 physProxy.writeBlob(0x0, jump_to_bl_32, sizeof(jump_to_bl_32)); 140 else 141 physProxy.writeBlob(0x0, jump_to_bl_64, sizeof(jump_to_bl_64)); 142 143 inform("Using bootloader at address %#x\n", bootldr->entryPoint()); 144 145 // Put the address of the boot loader into r7 so we know 146 // where to branch to after the reset fault 147 // All other values needed by the boot loader to know what to do 148 if (!p->gic_cpu_addr || !p->flags_addr) 149 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n"); 150 151 for (int i = 0; i < threadContexts.size(); i++) { 152 if (!_highestELIs64) 153 threadContexts[i]->setIntReg(3, (kernelEntry & loadAddrMask) + 154 loadAddrOffset); 155 threadContexts[i]->setIntReg(4, params()->gic_cpu_addr); 156 threadContexts[i]->setIntReg(5, params()->flags_addr); 157 threadContexts[i]->setIntReg(7, bootldr->entryPoint()); 158 } 159 inform("Using kernel entry physical address at %#x\n", 160 (kernelEntry & loadAddrMask) + loadAddrOffset); 161 } else { 162 // Set the initial PC to be at start of the kernel code 163 if (!_highestELIs64) 164 threadContexts[0]->pcState((kernelEntry & loadAddrMask) + 165 loadAddrOffset); 166 } 167} 168 169bool 170ArmSystem::haveSecurity(ThreadContext *tc) 171{ 172 if (!FullSystem) 173 return false; 174 175 ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr()); 176 assert(a_sys); 177 return a_sys->haveSecurity(); 178} 179 180 181ArmSystem::~ArmSystem() 182{ 183 if (debugPrintkEvent) 184 delete debugPrintkEvent; 185} 186 187ObjectFile * 188ArmSystem::getBootLoader(ObjectFile *const obj) 189{ 190 for (auto &bl : bootLoaders) { 191 if (bl->getArch() == obj->getArch()) 192 return bl.get(); 193 } 194 195 return nullptr; 196} 197 198bool 199ArmSystem::haveLPAE(ThreadContext *tc) 200{ 201 if (!FullSystem) 202 return false; 203 204 ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr()); 205 assert(a_sys); 206 return a_sys->haveLPAE(); 207} 208 209bool 210ArmSystem::haveVirtualization(ThreadContext *tc) 211{ 212 if (!FullSystem) 213 return false; 214 215 ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr()); 216 assert(a_sys); 217 return a_sys->haveVirtualization(); 218} 219 220bool 221ArmSystem::highestELIs64(ThreadContext *tc) 222{ 223 return FullSystem ? 224 dynamic_cast<ArmSystem *>(tc->getSystemPtr())->highestELIs64() : 225 true; 226} 227 228ExceptionLevel 229ArmSystem::highestEL(ThreadContext *tc) 230{ 231 return FullSystem ? 232 dynamic_cast<ArmSystem *>(tc->getSystemPtr())->highestEL() : 233 EL1; 234} 235 236Addr 237ArmSystem::resetAddr64(ThreadContext *tc) 238{ 239 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->resetAddr64(); 240} 241 242uint8_t 243ArmSystem::physAddrRange(ThreadContext *tc) 244{ 245 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->physAddrRange(); 246} 247 248Addr 249ArmSystem::physAddrMask(ThreadContext *tc) 250{ 251 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->physAddrMask(); 252} 253 254bool 255ArmSystem::haveLargeAsid64(ThreadContext *tc) 256{ 257 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->haveLargeAsid64(); 258} 259 260ArmSystem * 261ArmSystemParams::create() 262{ 263 return new ArmSystem(this); 264} 265 266void 267GenericArmSystem::initState() 268{ 269 // Moved from the constructor to here since it relies on the 270 // address map being resolved in the interconnect 271 272 // Call the initialisation of the super class 273 ArmSystem::initState(); 274} 275 276GenericArmSystem * 277GenericArmSystemParams::create() 278{ 279 280 return new GenericArmSystem(this); 281} 282