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Pci memory for Tundra Universe II

PostPosted: Wed Oct 12, 2016 6:58 am
by oleg.gopov
Good day, dear friends.

I am happy user of the qnx 6.4.0 operation system. Please, help me out.

I think all people here know about VME-to-PCI bridge that name Tundra Universe II.

My question is:

When we need to setup tundra window we must put into tundra service register address ( for example , LSI0_BS) of the pci
memory that is aligned to 0x1000. In our project we define this address statically. For example,

#define VMEA16_WIN_BASE 0xA0000000

Of course this address must be free. Recently we ran into the situation when this address was allocated to other device
and our system didn't work. Question is .............

How Can I get such address dynamically ??? Does qnx have mechanisms to send me this address ??? How Can I ask qnx os
about next free address ( that have resolution of 4K ) in the pci memory???

Muchas gracias , amigos.

Re: Pci memory for Tundra Universe II

PostPosted: Tue Nov 01, 2016 10:13 am
by Thunderblade

I don't think statically defined addresses are allowed in this context. You should use the PCI server functions like pci_read_config*() functions to get the address that has been assigned to your hardware by the PCI controller.


- Malte

Re: Pci memory for Tundra Universe II

PostPosted: Thu Nov 03, 2016 5:25 am
by oleg.gopov
Thanks for reply.

You don't understand me correctly.

Such addresses as BASE_ADDR of tundra configuration registers I read via pci server functions because this addr is assigned by the BIOS. But such addresses (they are special registers) as addr of tundra's image I have to configure myself. This addr is not assigned by BIOS.........Therefore I have to ask qnx about free window in the pci memory aligned by 1K ( alignment is requirement of Tundra's specification ).

Thanks in advance.