Hi,everyone:
I would like to make the devices in arm architecture work in FS mode like the
hdlcd.I found
the python code related to the hdlcd in src/dev/arm/RealView.py:
hdlcd=HDLcd(pio_addr=0x2b000000,int_num=117)
I think the address 0x2b000000 is the start address the device responds to, to
drive a device,we should configure its registers,so I wrote the C
application hdlcd.c to enable the hdlcd:
int
main(){
volatile unsigned int *p=(volatile unsigned int*)0x2b000230;(the address of the
enable register
of hdlcd) *p=0x00000001; Return 0;
}
Then I
compiled the code above and created the script hdlcd.rcS in gem5/configs/boot:
#!/bin/sh#wait
for system to calm downSleep
10#take a
checkpoint in 100000nsm5
checkpoint 100000#Reset
the statsm5
reset stats#Run
hdlcd/hdlcd#Exit
the simulation
m5 exit
Then I
run the application in gem5 in FS mode.
Command
line:~/gem5$
sudo mount –o,loop,offset=32256 dist/disks/linux-arm-ael.img /mnt~/gem5$
sudo cp hdlcd /mnt~/gem5$
sudo umount /mnt
~/gem5$
export LINUX_IMAGE=dist/disks/linux-arm-ael.img~/gem5$
./build/ARM/gem5.opt configs/example/fs.py
--kernel=vmlinux-3.3-arm-vexpress-emm-pcie
--disk=linux-arm-ael.img --mem-size=512MB --machine-type=VExpress_EMM
--script=./configs/boot/hdlcd.rcSgem5 Simulator System.
http://gem5.org…Info:kernel
located at:/dist/binaries/vmlinux-3.3-arm-vexpress-emm-pcieListening
for system connection on port 5900Listening
for system connection on port 34560:system.cpu.isa:ISA
system set to:0xd63b780 0xd63b780
0:system.remote_gdb.listener.Listening
for remote gdb #0 on port 7000Info:Using
bootloader at address 0x10
Info:Using
kernel entry physical address at 0x80008000****REAL
SIMULATION****Info:Entering
event [email protected] simulation……Writing
checkpointInfo：Entering event queue @12607424867000.starting
simulation…
Exiting@tick
12608849941000 because m5_exit instruction encountered
Terminal~/gem5$
./util/term/m5term 127.0.0.1 3456====m5
slave terminal:Terminal 0====…Starting
Pid 576,tty “:’/etc/rc.d/rc.local’Warning:can’t
open /etc/matlab:No such file or directoryThu Jan
1 00:00:02 UTC 2009S:devptsThu Jan
1 00:00:02 UTC 2009Segmentation
fault
It
showed me a segmentation fault.
I used
gdb to debug it.I set the debug flag “HDLcd”.Command
line:~/gem5$
gdb --args ./build/ARM/gem5.opt configs/example/fs.py
--kernel=vmlinux-3.3-arm-vexpress-emm-pcie
--disk=linux-arm-ael.img --mem-size=512MB --machine-type=VExpress_EMM
--script=./configs/boot/hdlcd.rcS...(gdb)call setDebugFlag(“HDLcd”)(gdb)
continuecontinuinggem5
Simulator System. http://gem5.org...Writing
checkpoint
12607424274000:system.realview.hdlcd:Serializing
ARM HDLCDInfo：Entering event queue @12607424274000.starting
simulation…
Exiting@tick
12608849456000 because m5_exit instruction encountered
The “Serializing ARM HDLCD”
is in HDLcd::serialize(std::ostream &os),it shows the serialize()
function is called,but I think if a device is enabled,its read() or write()
function should be called.So does
anyone know how to call the read() or write() function of a device and to make
it work.I would appreciate any advice how should I drive a device.Thanks
Ran Luo_______________________________________________
gem5-users mailing list
[email protected]
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
