1/* |
2 * Copyright (c) 2010, 2012-2013 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 --- 32 unchanged lines hidden (view full) --- 43#include <iostream> 44 45#include "arch/arm/system.hh" 46#include "base/loader/object_file.hh" 47#include "base/loader/symtab.hh" 48#include "cpu/thread_context.hh" 49#include "mem/physical.hh" 50#include "mem/fs_translating_port_proxy.hh" |
51#include "sim/full_system.hh" |
52 53using namespace std; 54using namespace Linux; 55 56ArmSystem::ArmSystem(Params *p) |
57 : System(p), bootldr(NULL), _haveSecurity(p->have_security), 58 _haveLPAE(p->have_lpae), 59 _haveVirtualization(p->have_virtualization), 60 _haveGenericTimer(p->have_generic_timer), 61 _highestELIs64(p->highest_el_is_64), 62 _resetAddr64(p->reset_addr_64), 63 _physAddrRange64(p->phys_addr_range_64), 64 _haveLargeAsid64(p->have_large_asid_64), 65 multiProc(p->multi_proc) |
66{ |
67 // Check if the physical address range is valid 68 if (_highestELIs64 && ( 69 _physAddrRange64 < 32 || 70 _physAddrRange64 > 48 || 71 (_physAddrRange64 % 4 != 0 && _physAddrRange64 != 42))) { 72 fatal("Invalid physical address range (%d)\n", _physAddrRange64); 73 } 74 |
75 if (p->boot_loader != "") { 76 bootldr = createObjectFile(p->boot_loader); 77 78 if (!bootldr) 79 fatal("Could not read bootloader: %s\n", p->boot_loader); 80 |
81 if ((bootldr->getArch() == ObjectFile::Arm64) && !_highestELIs64) { 82 warn("Highest ARM exception-level set to AArch32 but bootloader " 83 "is for AArch64. Assuming you wanted these to match.\n"); 84 _highestELIs64 = true; 85 } else if ((bootldr->getArch() == ObjectFile::Arm) && _highestELIs64) { 86 warn("Highest ARM exception-level set to AArch64 but bootloader " 87 "is for AArch32. Assuming you wanted these to match.\n"); 88 _highestELIs64 = false; 89 } 90 |
91 bootldr->loadGlobalSymbols(debugSymbolTable); 92 93 } 94 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); 95} 96 97void 98ArmSystem::initState() --- 4 unchanged lines hidden (view full) --- 103 // Call the initialisation of the super class 104 System::initState(); 105 106 const Params* p = params(); 107 108 if (bootldr) { 109 bootldr->loadSections(physProxy); 110 |
111 uint8_t jump_to_bl_32[] = |
112 { |
113 0x07, 0xf0, 0xa0, 0xe1 // branch to r7 in aarch32 |
114 }; |
115 |
116 uint8_t jump_to_bl_64[] = 117 { 118 0xe0, 0x00, 0x1f, 0xd6 // instruction "br x7" in aarch64 119 }; 120 121 // write the jump to branch table into address 0 122 if (!_highestELIs64) 123 physProxy.writeBlob(0x0, jump_to_bl_32, sizeof(jump_to_bl_32)); 124 else 125 physProxy.writeBlob(0x0, jump_to_bl_64, sizeof(jump_to_bl_64)); 126 |
127 inform("Using bootloader at address %#x\n", bootldr->entryPoint()); 128 129 // Put the address of the boot loader into r7 so we know 130 // where to branch to after the reset fault 131 // All other values needed by the boot loader to know what to do 132 if (!p->gic_cpu_addr || !p->flags_addr) 133 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n"); 134 135 for (int i = 0; i < threadContexts.size(); i++) { |
136 if (!_highestELIs64) 137 threadContexts[i]->setIntReg(3, (kernelEntry & loadAddrMask) + 138 loadAddrOffset); |
139 threadContexts[i]->setIntReg(4, params()->gic_cpu_addr); 140 threadContexts[i]->setIntReg(5, params()->flags_addr); 141 threadContexts[i]->setIntReg(7, bootldr->entryPoint()); 142 } |
143 inform("Using kernel entry physical address at %#x\n", 144 (kernelEntry & loadAddrMask) + loadAddrOffset); |
145 } else { 146 // Set the initial PC to be at start of the kernel code |
147 if (!_highestELIs64) 148 threadContexts[0]->pcState((kernelEntry & loadAddrMask) + 149 loadAddrOffset); |
150 } 151} 152 |
153GenericTimer::ArchTimer * 154ArmSystem::getArchTimer(int cpu_id) const 155{ 156 if (_genericTimer) { 157 return _genericTimer->getArchTimer(cpu_id); 158 } 159 return NULL; 160} 161 162GenericTimer::SystemCounter * 163ArmSystem::getSystemCounter() const 164{ 165 if (_genericTimer) { 166 return _genericTimer->getSystemCounter(); 167 } 168 return NULL; 169} 170 171bool 172ArmSystem::haveSecurity(ThreadContext *tc) 173{ 174 if (!FullSystem) 175 return false; 176 177 ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr()); 178 assert(a_sys); 179 return a_sys->haveSecurity(); 180} 181 182 |
183ArmSystem::~ArmSystem() 184{ 185 if (debugPrintkEvent) 186 delete debugPrintkEvent; 187} 188 |
189bool 190ArmSystem::haveLPAE(ThreadContext *tc) 191{ 192 if (!FullSystem) 193 return false; |
194 |
195 ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr()); 196 assert(a_sys); 197 return a_sys->haveLPAE(); 198} 199 200bool 201ArmSystem::haveVirtualization(ThreadContext *tc) 202{ 203 if (!FullSystem) 204 return false; 205 206 ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr()); 207 assert(a_sys); 208 return a_sys->haveVirtualization(); 209} 210 211bool 212ArmSystem::highestELIs64(ThreadContext *tc) 213{ 214 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->highestELIs64(); 215} 216 217ExceptionLevel 218ArmSystem::highestEL(ThreadContext *tc) 219{ 220 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->highestEL(); 221} 222 223Addr 224ArmSystem::resetAddr64(ThreadContext *tc) 225{ 226 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->resetAddr64(); 227} 228 229uint8_t 230ArmSystem::physAddrRange(ThreadContext *tc) 231{ 232 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->physAddrRange(); 233} 234 235Addr 236ArmSystem::physAddrMask(ThreadContext *tc) 237{ 238 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->physAddrMask(); 239} 240 241bool 242ArmSystem::haveLargeAsid64(ThreadContext *tc) 243{ 244 return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->haveLargeAsid64(); 245} |
246ArmSystem * 247ArmSystemParams::create() 248{ 249 return new ArmSystem(this); 250} |