* Was there a way to bind a shared memory object onto a fixed physical memory address? @ 2020-04-02 9:38 kipade 2020-04-02 12:19 ` Greg KH 0 siblings, 1 reply; 4+ messages in thread From: kipade @ 2020-04-02 9:38 UTC (permalink / raw) To: kernelnewbies [-- Attachment #1.1: Type: text/plain, Size: 238 bytes --] 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. [-- Attachment #1.2: Type: text/html, Size: 492 bytes --] [-- Attachment #2: Type: text/plain, Size: 170 bytes --] _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Was there a way to bind a shared memory object onto a fixed physical memory address? 2020-04-02 9:38 Was there a way to bind a shared memory object onto a fixed physical memory address? kipade @ 2020-04-02 12:19 ` Greg KH 2020-04-20 3:02 ` kipade 0 siblings, 1 reply; 4+ messages in thread From: Greg KH @ 2020-04-02 12:19 UTC (permalink / raw) To: kipade; +Cc: kernelnewbies 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 _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Was there a way to bind a shared memory object onto a fixed physical memory address? 2020-04-02 12:19 ` Greg KH @ 2020-04-20 3:02 ` kipade 2020-04-20 12:34 ` Amit Kumar 0 siblings, 1 reply; 4+ messages in thread From: kipade @ 2020-04-20 3:02 UTC (permalink / raw) To: Greg KH; +Cc: kernelnewbies 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 _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Was there a way to bind a shared memory object onto a fixed physical memory address? 2020-04-20 3:02 ` kipade @ 2020-04-20 12:34 ` Amit Kumar 0 siblings, 0 replies; 4+ messages in thread From: Amit Kumar @ 2020-04-20 12:34 UTC (permalink / raw) To: kipade; +Cc: Greg KH, Kernel Newbies [-- Attachment #1.1: Type: text/plain, Size: 1488 bytes --] 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 > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > [-- Attachment #1.2: Type: text/html, Size: 2393 bytes --] [-- Attachment #2: Type: text/plain, Size: 170 bytes --] _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-04-20 12:37 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-04-02 9:38 Was there a way to bind a shared memory object onto a fixed physical memory address? kipade 2020-04-02 12:19 ` Greg KH 2020-04-20 3:02 ` kipade 2020-04-20 12:34 ` Amit Kumar
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