ARCv2 & ARCv3 Emulation (QEMU)
Overview
This board configuration will use QEMU to emulate set of generic ARCv2 and ARCv3 hardware platforms.
The following features of ARC ISA cores are currently supported:
CPU: * ARCv2 EM * ARCv2 HS3x * ARCv3 HS5x * ARCv3 HS6x
Only little-endian configurations
Full 32 register set
ARC core free-running timers/counters Timer0 & Timer1
ARC core interrupt controller with multiple priority levels
DW UART
5 slots for MMIO Virtio devices
Hardware
Supported Features
The following hardware features are supported:
Interface |
Controller |
Driver/Component |
|---|---|---|
ARCv2 INTC |
on-chip |
interrupt controller |
DW UART |
on-chip |
serial port |
ARC TIMER0 |
on-chip |
system clock |
The kernel currently does not support other hardware features on this platform.
Devices
System Clock
This board configuration uses a system clock frequency of 1 MHz.
Serial Port
This board configuration uses a single serial communication channel with the DesignWare UART.
Known Problems or Limitations
The following platform features are unsupported:
Memory-protection unit (MPU)
MMIO Virtio Ethernet
Programming and Debugging
Use this configuration to run basic Zephyr applications and kernel tests in the QEMU
emulated environment, for example, with the Basic Synchronization sample
(note you may use qemu_arc/qemu_em, qemu_arc/qemu_hs, qemu_arc/qemu_hs5x or
qemu_arc/qemu_hs6x depending on target CPU):
# From the root of the zephyr repository
west build -b qemu_arc/qemu_em samples/synchronization
west build -t run
This will build an image with the synchronization sample app, boot it using QEMU, and display the following console output:
*** Booting Zephyr OS build zephyr-v2.2.0-2486-g7dbfcf4bab57 ***
threadA: Hello World from qemu_arc!
threadB: Hello World from qemu_arc!
threadA: Hello World from qemu_arc!
threadB: Hello World from qemu_arc!
Exit QEMU by pressing CTRL+A x.
Debugging
Refer to the detailed overview about Application Debugging.
References
- 1.`Programmer’s Reference Manual for ARC HS