Arm Versatile Express boards (vexpress-a9
, vexpress-a15
)ΒΆ
QEMU models two variants of the Arm Versatile Express development board family:
vexpress-a9
models the combination of the Versatile Express motherboard and the CoreTile Express A9x4 daughterboardvexpress-a15
models the combination of the Versatile Express motherboard and the CoreTile Express A15x2 daughterboard
Note that as this hardware does not have PCI, IDE or SCSI, the only available storage option is emulated SD card.
Implemented devices:
PL041 audio
PL181 SD controller
PL050 keyboard and mouse
PL011 UARTs
SP804 timers
I2C controller
PL031 RTC
PL111 LCD display controller
Flash memory
LAN9118 ethernet
Unimplemented devices:
SP810 system control block
PCI-express
USB controller (Philips ISP1761)
Local DAP ROM
CoreSight interfaces
PL301 AXI interconnect
SCC
System counter
HDLCD controller (
vexpress-a15
)SP805 watchdog
PL341 dynamic memory controller
DMA330 DMA controller
PL354 static memory controller
BP147 TrustZone Protection Controller
TrustZone Address Space Controller
Other differences between the hardware and the QEMU model:
QEMU will default to creating one CPU unless you pass a different
-smp
argumentQEMU allows the amount of RAM provided to be specified with the
-m
argumentQEMU defaults to providing a CPU which does not provide either TrustZone or the Virtualization Extensions: if you want these you must enable them with
-machine secure=on
and-machine virtualization=on
QEMU provides 4 virtio-mmio virtio transports; these start at address
0x10013000
forvexpress-a9
and at0x1c130000
forvexpress-a15
, and have IRQs from 40 upwards. If a dtb is provided on the command line then QEMU will edit it to include suitable entries describing these transports for the guest.