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QEMU

QEMU is a generic and open source machine emulator and virtualizer.

Information

Targets Supported:

  • lm3s6963-ek

NOTE: TizenRT supports three memory options for lm3s6963-ek board.

Environment Set-up

This section covers board-specific environment set-up.
Please set TizenRT common environment, quick start, first before doing below.

QEMU installation

Qemu version used 2.12.0-rc1

wget https://download.qemu.org/qemu-2.12.0-rc1.tar.xz

tar xvJf qemu-2.12.0-rc1.tar.xz

cd qemu-2.12.0-rc1

To Run QEMU with 1MB RAM, copy qemu-2.12.0-rc1_1m_ram_size.patch from TizenRT/build/configs/qemu to PWD

patch -p1 < qemu-2.12.0-rc1_1m_ram_size.patch

To Run QEMU with 16MB RAM, copy qemu-2.12.0-rc1_16m_ram_size.patch from TizenRT/build/configs/qemu to PWD

patch -p1 < qemu-2.12.0-rc1_16m_ram_size.patch

./configure --target-list=arm-softmmu

make -j 4

cd arm-softmmu/

sudo ln qemu-system-arm /usr/local/bin/qemu-system-arm

How to program a binary

There are two methods,

  • Using qemu command

  • Using make command.

After building TizenRT, follow below steps at $TIZENRT_BASEDIR/os folder.

See [Getting the sources] for how to set TIZENRT_BASEDIR.

Using QEMU command

qemu-system-arm -M lm3s6965evb -kernel ../build/output/bin/tinyara -nographic -gdb tcp::3333

Using make command

./dbuild.sh download

How to debug

To debug TizenRT on QEMU, GDB should be connected through below commands.

arm-none-eabi-gdb
(gdb) file ../build/output/bin/tinyara
(gdb) target remote:3333

Configuration Sets

tc_64k

for running tc under 256KB flash and 64KB sram

tc_1m

for running tc under 32MB flash and 1MB sram

tc_16m

for running tc under 128MB flash and 16MB sram

APPENDIX

How to change memory size

If you want to set your sram to 64KB or 16MB, follow these steps.
make menuconfig

Enter Board Selection -> Build for qemu hardware
Select NONE(64KB) or Build for SRAM increased QEMU Hardware(16MB)

Enter Chip Selection -> Boot Memory Configuration
Set Primary RAM size to 65536(64KB) or 16777216(16MB)

How to run network stack on QEMU

To run the network stack on QEMU please refer How to run network stack on Qemu.

Trouble Shooting

Issues on ./configure --target-list=arm-softmmu

If you encouter below log after ./configure --target-list=arm-softmmu,

ERROR: pixman >= 0.21.8 not present.
       Please install the pixman devel package.

install pixman to reslove issue.

sudo apt-get install libpixman-1-dev