gem5  v21.1.0.2
fs_workload.cc
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37 
39 
40 #include "arch/x86/regs/int.hh"
41 #include "base/trace.hh"
42 #include "cpu/thread_context.hh"
43 #include "mem/port_proxy.hh"
44 #include "params/X86FsLinux.hh"
45 #include "sim/byteswap.hh"
46 #include "sim/system.hh"
47 
48 namespace gem5
49 {
50 
51 namespace X86ISA
52 {
53 
55  X86ISA::FsWorkload(p), e820Table(p.e820_table)
56 {}
57 
58 void
60 {
62 
63  auto phys_proxy = system->physProxy;
64 
65  // The location of the real mode data structure.
66  const Addr realModeData = 0x90200;
67 
68  /*
69  * Deal with the command line stuff.
70  */
71 
72  // A buffer to store the command line.
73  const Addr commandLineBuff = 0x90000;
74  // A pointer to the commandLineBuff stored in the real mode data.
75  const Addr commandLinePointer = realModeData + 0x228;
76 
77  panic_if(commandLine.length() + 1 > realModeData - commandLineBuff,
78  "Command line \"%s\" is longer than %d characters.",
79  commandLine, realModeData - commandLineBuff - 1);
80  phys_proxy.writeString(commandLineBuff, commandLine.c_str());
81 
82  // Generate a pointer of the right size and endianness to put into
83  // commandLinePointer.
84  uint32_t guestCommandLineBuff = htole((uint32_t)commandLineBuff);
85  phys_proxy.writeBlob(commandLinePointer, &guestCommandLineBuff,
86  sizeof(guestCommandLineBuff));
87 
88  /*
89  * Screen Info.
90  */
91 
92  // We'll skip on this for now because it's only needed for framebuffers,
93  // something we don't support at the moment.
94 
95  /*
96  * EDID info
97  */
98 
99  // Skipping for now.
100 
101  /*
102  * Saved video mode
103  */
104 
105  // Skipping for now.
106 
107  /*
108  * Loader type.
109  */
110 
111  // Skipping for now.
112 
113  /*
114  * E820 memory map
115  */
116 
117  // A pointer to the number of E820 entries there are.
118  const Addr e820MapNrPointer = realModeData + 0x1e8;
119 
120  // A pointer to the buffer for E820 entries.
121  const Addr e820MapPointer = realModeData + 0x2d0;
122 
123  e820Table->writeTo(phys_proxy, e820MapNrPointer, e820MapPointer);
124 
125  /*
126  * Pass the location of the real mode data structure to the kernel
127  * using register %esi. We'll use %rsi which should be equivalent.
128  */
129  system->threads[0]->setIntReg(INTREG_RSI, realModeData);
130 }
131 
132 } // namespace X86ISA
133 } // namespace gem5
system.hh
fs_workload.hh
gem5::System::physProxy
PortProxy physProxy
Port to physical memory used for writing object files into ram at boot.
Definition: system.hh:332
gem5::KernelWorkload::commandLine
const std::string commandLine
Definition: kernel_workload.hh:74
gem5::X86ISA::FsLinux::e820Table
E820Table * e820Table
Definition: fs_workload.hh:54
gem5::X86ISA::FsWorkload::initState
void initState() override
initState() is called on each SimObject when not restoring from a checkpoint.
Definition: fs_workload.cc:109
gem5::X86ISA::FsWorkload
Definition: fs_workload.hh:78
int.hh
port_proxy.hh
gem5::X86ISA::FsLinux::initState
void initState() override
initState() is called on each SimObject when not restoring from a checkpoint.
Definition: fs_workload.cc:59
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147
gem5::X86ISA::E820Table::writeTo
void writeTo(PortProxy &proxy, Addr countAddr, Addr addr)
Definition: e820.cc:56
panic_if
#define panic_if(cond,...)
Conditional panic macro that checks the supplied condition and only panics if the condition is true a...
Definition: logging.hh:203
gem5::System::threads
Threads threads
Definition: system.hh:316
gem5::htole
T htole(T value)
Definition: byteswap.hh:172
gem5::X86ISA::p
Bitfield< 0 > p
Definition: pagetable.hh:151
gem5::Workload::system
System * system
Definition: workload.hh:78
gem5::X86ISA::FsWorkload::Params
X86FsWorkloadParams Params
Definition: fs_workload.hh:81
trace.hh
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
thread_context.hh
gem5::X86ISA::FsLinux::FsLinux
FsLinux(const Params &p)
Definition: fs_workload.cc:54
byteswap.hh

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