gem5 with ARM

Mon May 22 23:43:23 UTC 2017

On Mon, May 22, 2017 at 5:32 PM, Tanu Hari Dixit <tokencolour at gmail.com> wrote:
> Hello all,
> Thank you for creating
> https://devel.rtems.org/wiki/Developer/Simulators/gem5 just in time. I
> installed gem5 and scons build/ARM/gem5.opt ran to give the following
> output at the end:
> scons: done building targets.
>
This is work-in-progress. I had to write the timer hardware support in
gem5 and fix some other small issues. You would need to apply patches
currently under review by the gem5 developers, there are four patches
available and you can get them by using the "Download" button on their
Gerrit instance: https://gem5-review.googlesource.com/c/3264/

But I found out that the basic support even for hello world is broken
for RTEMS as of rtems.git/cd3d74793a4e2ec93cefdddb855d4536d44c7e64

If you roll back your rtems to before that commit you should be able
to successfully run hello world with gem5 after applying those 4
patches.

> I ran the following, after this:
> build/ARM/gem5.opt configs/example/fs.py
> --kernel=${HOME}/development/rtems/src/builds/realview_pbx_a9_qemu/arm-rtems4.12/c/realview_pbx_a9_qemu/testsuites/samples/hello/hello.exe
> --mem-size=256MB --bare-metal --machine-type=RealView_PBX
> --dtb-filename=None --enable-security-extensions
> as instructed in the link.
>
> But it gave the following output:
> Usage: fs.py [options]
> fs.py: error: no such option: --enable-security-extensions
>
> I tried it without the option, and still found no luck;
>
> thd at thd-Inspiron-5537:~/gem5$ build/ARM/gem5.opt configs/example/fs.py
> --kernel=${HOME}/development/rtems/src/builds/realview_pbx_a9_qemu/arm-rtems4.12/c/realview_pbx_a9_qemu/testsuites/samples/hello/hello.exe
> --mem-size=256MB --bare-metal --machine-type=RealView_PBX
> --dtb-filename=None
> gem5 Simulator System.  http://gem5.org
> gem5 is copyrighted software; use the --copyright option for details.
>
> gem5 compiled Mar 16 2017 02:46:18
> gem5 started May 23 2017 02:59:01
> gem5 executing on thd-Inspiron-5537, pid 7719
> command line: build/ARM/gem5.opt configs/example/fs.py
> --kernel=/home/thd/development/rtems/src/builds/realview_pbx_a9_qemu/arm-rtems4.12/c/realview_pbx_a9_qemu/testsuites/samples/hello/hello.exe
> --mem-size=256MB --bare-metal --machine-type=RealView_PBX
> --dtb-filename=None
>
> Global frequency set at 1000000000000 ticks per second
> warn: DRAM device capacity (8192 Mbytes) does not match the address
> range assigned (256 Mbytes)
> info: kernel located at:
> /home/thd/development/rtems/src/builds/realview_pbx_a9_qemu/arm-rtems4.12/c/realview_pbx_a9_qemu/testsuites/samples/hello/hello.exe
> Listening for system connection on port 5900
> Listening for system connection on port 3456
> 0: system.remote_gdb.listener: listening for remote gdb #0 on port 7000
> warn: ClockedObject: More than one power state change request
> encountered within the same simulation tick
> **** REAL SIMULATION ****
> warn: Existing EnergyCtrl, but no enabled DVFSHandler found.
> info: Entering event queue @ 0.  Starting simulation...
> warn:     instruction 'mcr bpiall' unimplemented
> panic: Tried to write SCU at offset 0
> Memory Usage: 660292 KBytes
> Program aborted at tick 56000
> --- BEGIN LIBC BACKTRACE ---
> build/ARM/gem5.opt(_Z15print_backtracev+0x15)[0xc45c55]
> build/ARM/gem5.opt(_Z12abortHandleri+0x36)[0xc55786]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7f3b92e6c330]
> /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x37)[0x7f3b916bdc37]
> /lib/x86_64-linux-gnu/libc.so.6(abort+0x148)[0x7f3b916c1028]
> build/ARM/gem5.opt(_ZN5A9SCU5writeEP6Packet+0x4e)[0xb39e8e]
> build/ARM/gem5.opt(_ZN7PioPort10recvAtomicEP6Packet+0x66)[0xafd666]
> build/ARM/gem5.opt(_ZN12CoherentXBar10recvAtomicEP6Packets+0x3cf)[0x9c98ef]
> build/ARM/gem5.opt(_ZN15AtomicSimpleCPU8writeMemEPhjm5FlagsIjEPm+0x337)[0xe102c7]
> build/ARM/gem5.opt(_ZN17SimpleExecContext8writeMemEPhjm5FlagsIjEPm+0x21)[0xe1b181]
> build/ARM/gem5.opt(_Z14writeMemAtomicI11ExecContextjESt10shared_ptrI9FaultBaseEPT_PN5Trace10InstRecordERKT0_m5FlagsIjEPm+0x4b)[0x156653b]
> build/ARM/gem5.opt(_ZNK10ArmISAInst28STORE_IMM_AY_PN_SN_UN_WN_SZ47executeEP11ExecContextPN5Trace10InstRecordE+0x171)[0x1525461]
> build/ARM/gem5.opt(_ZN15AtomicSimpleCPU4tickEv+0x277)[0xe0ed27]
> build/ARM/gem5.opt(_ZN10EventQueue10serviceOneEv+0xb1)[0xc4dcc1]
> build/ARM/gem5.opt(_Z9doSimLoopP10EventQueue+0x38)[0xc6fc38]
> build/ARM/gem5.opt(_Z8simulatem+0x35b)[0xc7031b]
> build/ARM/gem5.opt[0x965e7c]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x45f7)[0x7f3b92a375b7]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3b92a39c3d]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x48d8)[0x7f3b92a37898]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4b59)[0x7f3b92a37b19]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4b59)[0x7f3b92a37b19]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3b92a39c3d]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7f3b92a39f22]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x563e)[0x7f3b92a385fe]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3b92a39c3d]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x48d8)[0x7f3b92a37898]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3b92a39c3d]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7f3b92a39f22]
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyRun_StringFlags+0x79)[0x7f3b9294c529]
> build/ARM/gem5.opt(_Z6m5MainiPPc+0x5f)[0xc54d1f]
> build/ARM/gem5.opt(main+0x33)[0x8e3b53]
> --- END LIBC BACKTRACE ---
> Aborted (core dumped)
>
> Can you please help me with this? I can't figure out what is wrong.
> I need to run the simulator for sparc64/usiii and
> arm/realview_pbx_a9_qemu BSPs and eventually automate it with
> rtems-tester (as part of GSoC, '17).
>
> Thank you,
> Tanu Hari Dixit.