Prerequisites

Before building and compiling the AMP system, make sure you prepare for the items listed in this topic.

Connect RT-Thread Serial Port

RT-Thread uses UART2 as its system console. In this application, pin11 and pin13 on the 40-pin GPIO header of VisionFive 2 or VisionFive 2 Lite are used as RX/TX pins.

Table 1. RT-Thread Serial Port Connection
Pin Function
Pin 9 GND
Pin 11 (GPIO42) UART2 RX
Pin 13 (GPIO43) UART2TX
Figure 1. 40-Pin Out

Software Requirements

All AMP code has been merged into StarFive Linux 6.6 SDK.

Download it from: https://github.com/starfive-tech/VisionFive2/tree/JH7110_VisionFive2_6.6.y_devel

APM Source Code

Linux-side code (in the kernel tree)

Component Description
RPMsg code

RPMsg (Remote Processor Messaging) defines the standard binary interface used for communication between cores in the AMP system.

Locate the RPMsg code at:
driver/rpmsg/virtio_rpmsg_bus.c
drivers/rpmsg/starfive_rpmsg.c
Mailbox code Locate the mailbox code at:
drivers/mailbox/starfive_ipi_mailbox.c
AMP DTS file Locate the device tree file at: 
arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2-amp.dts

RT-Thread code (in the SDK)

Component Description
JH7110 BSP (Clock, Pinctrl, GPIO, apps)
Contains driver code of JH-7110 Clock, Pinctrl and GPIO, and other simple applications.
rtthread/bsp/starfive/jh7110/
RPMsg-Lite (virtio-based IPC) Locate the mailbox code at:
rtthread/bsp/starfive/libraries/component/rpmsg-lite
Drivers (UART, GMAC, PCIe, CAN, etc.) Open-source rpmsg-lite code, which is also the open-source virtio-base code of RPMsgSend, which sends and receives data with Linux according to the protocol. 
rtthread/bsp/starfive/libraries/driver
Test applications Locate the test applications at:
rtthread/bsp/starfive/libraries/applications