RPMsg，全称为Remote Processor Messaging，是核间通信的一种标准。它由三个组件构成：RPmsg Bus、Rpmsg Device和Rpmsg Driver，主要代码位于drivers/rpmsg/目录下。当主从核心需要进行通信时，它们通过IPC（Inter Processor Communication）方式完成交互，RPMsg正是其中的一种实现。主从核心间使用共享内存通信，内...
T113-i由两颗ARM A7 、一颗C906（RISC-V）和一颗DSP（HIFI 4）组成。C906（RISC-V核）特性：主频最高1008MHz32KB I-cache+32 KB D-cache操作系统支持裸跑和FreeRTOS实时操作系统支持少量数据核间通讯（RPMsg）和大量核间数据（RPBuf）DSP（HIFI 4）特性：最高主频600MHz32KB L1 I-cache+32 KB L1 D-cac...
Here's my device tree configuration for reference: / { reserved-memory { #address-cells = <2>; #size-cells = <2>; ranges; gpu_reserved: gpu_reserved@B0000000 { no-map; reg = <0 0xB0000000 0 0x08000000>; }; vdev0vring0: vdev0vring0@90000000 { re...
之前基于nvme的队列对机制分析了设备与cpu如何进行通信,现在分析如果进行核与核进行通信。先打个底,慢慢补充。 RPMsg RPMsg 全称为Remote Processor Messaging ,这个技术定义了一种核间通信标准。整体框架有RPmsg Bus、Rpmsg Device和Rpmsg Driver所构成。代码主要在drivers/rpmsg/下。 如果是主从核心通信进行交互,那么通...
structrpmsg_driver {structdevice_driver drv;conststructrpmsg_device_id *id_table;int(*probe)(structrpmsg_device *dev);--当一个channel匹配后,调用probe函数。void(*remove)(structrpmsg_device *dev);int(*callback)(structrpmsg_device *,void*,int,void*, u32); ...
structrpmsg_endpoint *rpmsg_create_ept(structrpmsg_device *rpdev,rpmsg_rx_cb_tcb,void*priv,structrpmsg_channel_info chinfo); 系统中的每个rpmsg地址都绑定到一个rx回调函数(因此当传入消息到达时,它们通过rpmsg总线使用适当的回调处理程序进行分派),通过rpmsg_endpoint结构实现。
the RPMsg device is created when the VirtIO RPMsg driver is probed when a remote service is announced, it is kept in the virtio proc remote services list when a relevant RPMsg driver is registered, it is immediately probed by the RPMsg bus ...
static DEVICE_ATTR_RO(field);#define rpmsg_string_attr(field, member) \ static ssize_t \ field##_store(struct device *dev, struct device_attribute *attr, \ const char *buf, size_t sz) \ { \ struct rpmsg_device *rpdev = to_rpmsg_device(dev); \ ...
struct rpmsg_device *rpdev = to_rpmsg_device(dev); struct qcom_smd_device *qsdev = to_smd_device(rpdev);kfree(qsdev); }/* * Create a smd client device for channel that is being opened. */ @@ -998,6 +1006,7 @@ static int qcom_smd_create_device(struct qcom_smd_channel *chan...
struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *rpdev, rpmsg_rx_cb_t cb, void *priv, struct rpmsg_channel_info chinfo); 系统中的每个rpmsg地址都绑定到一个rx回调函数(因此当传入消息到达时,它们通过rpmsg总线使用适当的回调处理程序进行分派),通过rpmsg_endpoint结构实现。