system.cc revision 12531:3141027bd11a
1/* 2 * Copyright (c) 2010, 2012-2013, 2015,2017-2018 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 "arch/arm/semihosting.hh" 48#include "base/loader/object_file.hh" 49#include "base/loader/symtab.hh" 50#include "cpu/thread_context.hh" 51#include "mem/fs_translating_port_proxy.hh" 52#include "mem/physical.hh" 53#include "sim/full_system.hh" 54 55using namespace std; 56using namespace Linux; 57 58ArmSystem::ArmSystem(Params *p) 59 : System(p), 60 bootLoaders(), bootldr(nullptr), 61 _haveSecurity(p->have_security), 62 _haveLPAE(p->have_lpae), 63 _haveVirtualization(p->have_virtualization), 64 _genericTimer(nullptr), 65 _highestELIs64(p->highest_el_is_64), 66 _resetAddr64(p->auto_reset_addr_64 ? 67 (kernelEntry & loadAddrMask) + loadAddrOffset : 68 p->reset_addr_64), 69 _physAddrRange64(p->phys_addr_range_64), 70 _haveLargeAsid64(p->have_large_asid_64), 71 _m5opRange(p->m5ops_base ? 72 RangeSize(p->m5ops_base, 0x10000) : 73 AddrRange(1, 0)), // Create an empty range if disabled 74 semihosting(p->semihosting), 75 multiProc(p->multi_proc) 76{ 77 // Check if the physical address range is valid 78 if (_highestELIs64 && ( 79 _physAddrRange64 < 32 || 80 _physAddrRange64 > 48 || 81 (_physAddrRange64 % 4 != 0 && _physAddrRange64 != 42))) { 82 fatal("Invalid physical address range (%d)\n", _physAddrRange64); 83 } 84 85 bootLoaders.reserve(p->boot_loader.size()); 86 for (const auto &bl : p->boot_loader) { 87 std::unique_ptr<ObjectFile> obj; 88 obj.reset(createObjectFile(bl)); 89 90 fatal_if(!obj, "Could not read bootloader: %s\n", bl); 91 bootLoaders.emplace_back(std::move(obj)); 92 } 93 94 if (kernel) { 95 bootldr = getBootLoader(kernel); 96 } else if (!bootLoaders.empty()) { 97 // No kernel specified, default to the first boot loader 98 bootldr = bootLoaders[0].get(); 99 } 100 101 if (!bootLoaders.empty() && !bootldr) 102 fatal("Can't find a matching boot loader / kernel combination!"); 103 104 if (bootldr) { 105 bootldr->loadGlobalSymbols(debugSymbolTable); 106 if ((bootldr->getArch() == ObjectFile::Arm64) && !_highestELIs64) { 107 warn("Highest ARM exception-level set to AArch32 but bootloader " 108 "is for AArch64. Assuming you wanted these to match.\n"); 109 _highestELIs64 = true; 110 } else if ((bootldr->getArch() == ObjectFile::Arm) && _highestELIs64) { 111 warn("Highest ARM exception-level set to AArch64 but bootloader " 112 "is for AArch32. Assuming you wanted these to match.\n"); 113 _highestELIs64 = false; 114 } 115 } 116 117 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); 118} 119 120void 121ArmSystem::initState() 122{ 123 // Moved from the constructor to here since it relies on the 124 // address map being resolved in the interconnect 125 126 // Call the initialisation of the super class 127 System::initState(); 128 129 const Params* p = params(); 130 131 if (bootldr) { 132 bootldr->loadSections(physProxy); 133 134 uint8_t jump_to_bl_32[] = 135 { 136 0x07, 0xf0, 0xa0, 0xe1 // branch to r7 in aarch32 137 }; 138 139 uint8_t jump_to_bl_64[] = 140 { 141 0xe0, 0x00, 0x1f, 0xd6 // instruction "br x7" in aarch64 142 }; 143 144 // write the jump to branch table into address 0 145 if (!_highestELIs64) 146 physProxy.writeBlob(0x0, jump_to_bl_32, sizeof(jump_to_bl_32)); 147 else 148 physProxy.writeBlob(0x0, jump_to_bl_64, sizeof(jump_to_bl_64)); 149 150 inform("Using bootloader at address %#x\n", bootldr->entryPoint()); 151 152 // Put the address of the boot loader into r7 so we know 153 // where to branch to after the reset fault 154 // All other values needed by the boot loader to know what to do 155 if (!p->gic_cpu_addr || !p->flags_addr) 156 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n"); 157 158 for (int i = 0; i < threadContexts.size(); i++) { 159 if (!_highestELIs64) 160 threadContexts[i]->setIntReg(3, (kernelEntry & loadAddrMask) + 161 loadAddrOffset); 162 threadContexts[i]->setIntReg(4, params()->gic_cpu_addr); 163 threadContexts[i]->setIntReg(5, params()->flags_addr); 164 threadContexts[i]->setIntReg(7, bootldr->entryPoint()); 165 } 166 inform("Using kernel entry physical address at %#x\n", 167 (kernelEntry & loadAddrMask) + loadAddrOffset); 168 } else { 169 // Set the initial PC to be at start of the kernel code 170 if (!_highestELIs64) 171 threadContexts[0]->pcState((kernelEntry & loadAddrMask) + 172 loadAddrOffset); 173 } 174} 175 176ArmSystem* 177ArmSystem::getArmSystem(ThreadContext *tc) 178{ 179 ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr()); 180 assert(a_sys); 181 return a_sys; 182} 183 184bool 185ArmSystem::haveSecurity(ThreadContext *tc) 186{ 187 return FullSystem? getArmSystem(tc)->haveSecurity() : false; 188} 189 190 191ArmSystem::~ArmSystem() 192{ 193 if (debugPrintkEvent) 194 delete debugPrintkEvent; 195} 196 197ObjectFile * 198ArmSystem::getBootLoader(ObjectFile *const obj) 199{ 200 for (auto &bl : bootLoaders) { 201 if (bl->getArch() == obj->getArch()) 202 return bl.get(); 203 } 204 205 return nullptr; 206} 207 208bool 209ArmSystem::haveLPAE(ThreadContext *tc) 210{ 211 return FullSystem? getArmSystem(tc)->haveLPAE() : false; 212} 213 214bool 215ArmSystem::haveVirtualization(ThreadContext *tc) 216{ 217 return FullSystem? getArmSystem(tc)->haveVirtualization() : false; 218} 219 220bool 221ArmSystem::highestELIs64(ThreadContext *tc) 222{ 223 return FullSystem? getArmSystem(tc)->highestELIs64() : true; 224} 225 226ExceptionLevel 227ArmSystem::highestEL(ThreadContext *tc) 228{ 229 return FullSystem? getArmSystem(tc)->highestEL() : EL1; 230} 231 232bool 233ArmSystem::haveEL(ThreadContext *tc, ExceptionLevel el) 234{ 235 switch (el) { 236 case EL0: 237 case EL1: 238 return true; 239 case EL2: 240 return haveVirtualization(tc); 241 case EL3: 242 return haveSecurity(tc); 243 default: 244 warn("Unimplemented Exception Level\n"); 245 return false; 246 } 247} 248 249Addr 250ArmSystem::resetAddr64(ThreadContext *tc) 251{ 252 return getArmSystem(tc)->resetAddr64(); 253} 254 255uint8_t 256ArmSystem::physAddrRange(ThreadContext *tc) 257{ 258 return getArmSystem(tc)->physAddrRange(); 259} 260 261Addr 262ArmSystem::physAddrMask(ThreadContext *tc) 263{ 264 return getArmSystem(tc)->physAddrMask(); 265} 266 267bool 268ArmSystem::haveLargeAsid64(ThreadContext *tc) 269{ 270 return getArmSystem(tc)->haveLargeAsid64(); 271} 272 273bool 274ArmSystem::haveSemihosting(ThreadContext *tc) 275{ 276 return getArmSystem(tc)->haveSemihosting(); 277} 278 279uint64_t 280ArmSystem::callSemihosting64(ThreadContext *tc, 281 uint32_t op, uint64_t param) 282{ 283 ArmSystem *sys = getArmSystem(tc); 284 return sys->semihosting->call64(tc, op, param); 285} 286 287uint32_t 288ArmSystem::callSemihosting32(ThreadContext *tc, 289 uint32_t op, uint32_t param) 290{ 291 ArmSystem *sys = getArmSystem(tc); 292 return sys->semihosting->call32(tc, op, param); 293} 294 295ArmSystem * 296ArmSystemParams::create() 297{ 298 return new ArmSystem(this); 299} 300 301void 302GenericArmSystem::initState() 303{ 304 // Moved from the constructor to here since it relies on the 305 // address map being resolved in the interconnect 306 307 // Call the initialisation of the super class 308 ArmSystem::initState(); 309} 310 311GenericArmSystem * 312GenericArmSystemParams::create() 313{ 314 315 return new GenericArmSystem(this); 316} 317