Was there a way to bind a shared memory object onto a fixed physical memory address?
As the topic, I want to specify a fixed physical memory space to a shared memory object, which can use shm_XXX api to access the memory. Of course I do not want to use mmap api to map /dev/mem device memory into user program. Thanks all.
On Thu, Apr 02, 2020 at 05:38:31PM +0800, kipade wrote:
As the topic, I want to specify a fixed physical memory space to a shared memory object, which can use shm_XXX api to access the memory. Of course I do not want to use mmap api to map /dev/mem device memory into user program.
Step back and tell us exactly what problem you have, that you have come up to this type of solution being necessary? What do you think you can solve by doing this? thanks, greg k-h
Im sorry that my there were something wrong about my notebook for a half of month. Here, I want to use system shared memory API to share data across processes, but I want it use a specified range of memory knowned by a slave core such as DSP, etc. If I can do? thanks. On 2020/4/2 下午8:19, Greg KH wrote:
On Thu, Apr 02, 2020 at 05:38:31PM +0800, kipade wrote:
As the topic, I want to specify a fixed physical memory space to a shared memory object, which can use shm_XXX api to access the memory. Of course I do not want to use mmap api to map /dev/mem device memory into user program. Step back and tell us exactly what problem you have, that you have come up to this type of solution being necessary? What do you think you can solve by doing this?
thanks,
greg k-h
On Mon, Apr 20, 2020, 08:33 kipade <kipade@163.com> wrote:
Im sorry that my there were something wrong about my notebook for a half of month.
Here, I want to use system shared memory API to share data across processes, but I want it use a specified It's simple. As you are mentioning the API, so study that API.
I am also trying to learn kernel development, but through reading kernel documents. I think a kernel developer should not be fed rather he should eat. I will suggest you to just take a jump into kernel documentation directory, you will find yourself wet. Pardon me, if I have hurt you.
range of memory knowned by a slave core such as DSP, etc. If I can do?
thanks.
On 2020/4/2 下午8:19, Greg KH wrote:
On Thu, Apr 02, 2020 at 05:38:31PM +0800, kipade wrote:
As the topic, I want to specify a fixed physical memory space to a shared memory object, which can use shm_XXX api to access the memory. Of course I do not want to use mmap api to map /dev/mem device memory into user program. Step back and tell us exactly what problem you have, that you have come up to this type of solution being necessary? What do you think you can solve by doing this?
thanks,
greg k-h
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kipade