| Copyright: | 2018-2021,2023 NXP |
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Linux IPCF Shared Memory User-space Driver enables communication over shared memory with an RTOS running on different cores of the same processor.
The driver is accompanied by a sample application which demonstrates a ping-pong message communication with an RTOS application (for more details see the readme from sample directory).
The driver is integrated as out-of-tree kernel modules in NXP Auto Linux BSP.
The source code of this Linux driver is published on github.com.
The supported processors are listed in the sample application documentation.
For hardware configuration, please see Configuration Notes from "IPCF Shared Memory Kernel Driver for Linux".
The user-space static library (libipc-shm) will automatically insert the IPC UIO kernel module at initialization time. The path to the kernel module in the target board rootfs can be overwritten at compile time by setting IPC_UIO_MODULE_DIR variable from the caller.
The driver provides direct access to physical memory that is mapped non-cachable in user-space. Therefore, applications should make only aligned accesses in the shared memory buffers. Caution should be used when working with libc functions that may do unaligned accesses (e.g., string processing functions).
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