1/*
2 * Copyright (c) 2010 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

--- 41 unchanged lines hidden (view full) ---

50#include "mem/fs_translating_port_proxy.hh"
51
52using namespace std;
53using namespace Linux;
54
55ArmSystem::ArmSystem(Params *p)
56 : System(p), bootldr(NULL)
57{
58}
59
60void
61ArmSystem::initState()
62{
63 // Moved from the constructor to here since it relies on the
64 // address map being resolved in the interconnect
65
66 // Call the initialisation of the super class
67 System::initState();
68
69 const Params* p = params();
70
71 if ((p->boot_loader == "") != (p->boot_loader_mem == NULL))
72 fatal("If boot_loader is specifed, memory to load it must be also.\n");
73
74 if (p->boot_loader != "") {
75 bootldr = createObjectFile(p->boot_loader);
76
77 if (!bootldr)
78 fatal("Could not read bootloader: %s\n", p->boot_loader);
79
80 bootldr->loadSections(physProxy);
81 bootldr->loadGlobalSymbols(debugSymbolTable);
82
83 uint8_t jump_to_bl[] =
84 {
85 0x07, 0xf0, 0xa0, 0xe1 // branch to r7
86 };
87 physProxy.writeBlob(0x0, jump_to_bl, sizeof(jump_to_bl));
88
89 inform("Using bootloader at address %#x\n", bootldr->entryPoint());
90 }
91
92 if (bootldr) {
93 // Put the address of the boot loader into r7 so we know
94 // where to branch to after the reset fault
95 // All other values needed by the boot loader to know what to do
96 for (int i = 0; i < threadContexts.size(); i++) {
97 threadContexts[i]->setIntReg(3, kernelEntry & loadAddrMask);
98 threadContexts[i]->setIntReg(4, params()->gic_cpu_addr);
99 threadContexts[i]->setIntReg(5, params()->flags_addr);
100 threadContexts[i]->setIntReg(7, bootldr->entryPoint());
101 }
102 if (!p->gic_cpu_addr || !p->flags_addr)
103 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
104 } else {
105 // Set the initial PC to be at start of the kernel code
106 threadContexts[0]->pcState(kernelEntry & loadAddrMask);
107 }
108 for (int i = 0; i < threadContexts.size(); i++) {
109 if (p->midr_regval) {
110 threadContexts[i]->setMiscReg(ArmISA::MISCREG_MIDR,
111 p->midr_regval);
112 }
113 }
114
115 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
116}
117
118ArmSystem::~ArmSystem()
119{
120 if (debugPrintkEvent)
121 delete debugPrintkEvent;
122}
123
124
125ArmSystem *
126ArmSystemParams::create()
127{
128 return new ArmSystem(this);
129}