request_mem_region()解决方案: I'm a bit surprised that this works for you at all. The is passed a value of which is within the physical address range of system RAM, :. I'd guess that the (initial) error return is an indicator that the kernel has already installed this physical memor...
if (!request_mem_region(sgdma_rx_base, sgdma_rx_size, "altera_tse")) { printk(KERN_ERR "ERROR: %s:%d: request_mem_region() failed\n", __FILE__, __LINE__); ret = -EBUSY; goto out_sgdma_rx; } by if (!request_mem_region(sgdma_rx_base, sgdma_rx_size, "altera_tse"...
驱动就一个，其它想用GPIOB的模块（不要做成驱动）调用这个驱动就行了。就是其他模块直接使用这个映射过...
PCI-X采用64位PCI总线(PCI為32bit)，可以支持66,100,133MHz这些频率。而在未来，可能将提供更多的频率...
request_mem_region仅仅是linux对IO内存的管理,意思指这块内存我已经占用了,别人就不要动了,也不能被swap出去。使用这些寄存器时,可以不调用request_mem_region,但这样的话就不能阻止别人对他的访问了。 几乎每一种外设都是通过读写设备上的寄存器来进行的,通常包括控制寄存器、状态寄存器和数据寄存器三大类,外设的寄...
request_mem_region //将指定的地址范围注册到系统中//第一个参数 是地址//第二个参数 是size//第三个参数 是名称#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)structresource*__request_region(structresource*parent,resource_size_tstart,...
When I run the script "./load_ocl_kos.sh" encounter an error. [ 45.116180] CMEMK module: reference Linux version 4.19.73 [ 45.123187] CMEMK Error: Failed to request_mem_region(0xa9000000, 0x4000000) insmod: ERROR: could not insert module /opt/...
root@dra7xx-evm:/opt/vision_sdk# ./load_ocl_kos.sh Opened log file: lad.txt numProcessors = 5 id = 0 baseId = 0 Spawned daemon: /usr/bin/lad_dra7xx [ 45.116180] CMEMK module: reference Linux version 4.19.73 [ 45.123187] CMEMK Error: Failed to r...
0root@imx8mqevk:~# jailhouse enable /usr/share/jailhouse/cells/imx8mq.cell [ 1372.528225] jailhouse: request_mem_region failed for hypervisor memory.[ 1372.534954] jailhouse: Did you reserve the memory with "memmap=" or "mem="?JAILHOUSE_ENABLE: Invalid argumentroot@imx8mqevk:~#...