ACP port under Linux

Hello again,

Thanks for the references, I took a look at the pages and I ended up on using the zynq reference, I have the driver already developed for my FPGA module, a lot of thing I learned coding and configuring the environment. :)

Just one more question, you said that you are using the ioctl calls to sync the buffer when the FPGA is going to handle the data, but according to the driver the buffer is not being cached, am I wrong on that?

I see in the driver code the call to pgprot_noncached and in the user application the MAP_SHARED flag when mapping the buffer.

I noticed that in your code (d->my_buf[arg]) you are using an array of buffers, is that correct? then how are you managing the map requests from multiple map calls?

Also, I have a requested the linux system to only take 850M of my DDR3 SRAM (1G total), so I need in the kernel driver to allocate the last 150M of mem to be used as the buffer, how can I allocate that memory so I can then remap this area later to the user application? And still have the physical address reference there to be used by the FPGA transactions.

Thanks in advance for all your support!