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
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated

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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
52using namespace std;
53using namespace Linux;
54
55ArmSystem::ArmSystem(Params *p)
56 : System(p), bootldr(NULL), multiProc(p->multi_proc)
57{
58 if (p->boot_loader != "") {
59 bootldr = createObjectFile(p->boot_loader);
60
61 if (!bootldr)
62 fatal("Could not read bootloader: %s\n", p->boot_loader);
63
64 bootldr->loadGlobalSymbols(debugSymbolTable);
65
66 }
67 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
68}
69
70void
71ArmSystem::initState()

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76 // Call the initialisation of the super class
77 System::initState();
78
79 const Params* p = params();
80
81 if (bootldr) {
82 bootldr->loadSections(physProxy);
83
84 uint8_t jump_to_bl[] =
85 {
86 0x07, 0xf0, 0xa0, 0xe1 // branch to r7
87 };
88 physProxy.writeBlob(0x0, jump_to_bl, sizeof(jump_to_bl));
89
90 inform("Using bootloader at address %#x\n", bootldr->entryPoint());
91
92 // Put the address of the boot loader into r7 so we know
93 // where to branch to after the reset fault
94 // All other values needed by the boot loader to know what to do
95 if (!p->gic_cpu_addr || !p->flags_addr)
96 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
97
98 for (int i = 0; i < threadContexts.size(); i++) {
99 threadContexts[i]->setIntReg(3, kernelEntry & loadAddrMask);
100 threadContexts[i]->setIntReg(4, params()->gic_cpu_addr);
101 threadContexts[i]->setIntReg(5, params()->flags_addr);
102 threadContexts[i]->setIntReg(7, bootldr->entryPoint());
103 }
104 } else {
105 // Set the initial PC to be at start of the kernel code
106 threadContexts[0]->pcState(kernelEntry & loadAddrMask);
107 }
108}
109
110ArmSystem::~ArmSystem()
111{
112 if (debugPrintkEvent)
113 delete debugPrintkEvent;
114}
115
116
117ArmSystem *
118ArmSystemParams::create()
119{
120 return new ArmSystem(this);
121}