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LynxOS 3.1.0 - Accessing a PCI device registers in PCI-IO memory
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gta...@gmail.com
Apr 5, 2013, 7:19:31 AM4/5/13
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Hi there,
I am programming a block driver on LynxOS 3.1.0 for a PCI component (Silicon Image siI680a) and i am having issues on accessing the Internal Registers.
For project-specific reasons, I cannot use the DRM nor the PCI support facilities.
In my install entry point, I can succesfully :
- retrieve the device structure : PCIGetDevice()
- configure the different Configuration Registers : PCIWriteConf()
- map the Internal Registers : PCIMapDevice(), which gives me the virtual memory adress of these registers.
But when I try to read or write in these registers (to initialize the device for example), it does not work.
I have a Bus Error which seems to mean that the memory is not mapped properly.
Does anyone has any idea of what is wrong ?
Thanks a lot for any help !
Guillaume
I am programming a block driver on LynxOS 3.1.0 for a PCI component (Silicon Image siI680a) and i am having issues on accessing the Internal Registers.
For project-specific reasons, I cannot use the DRM nor the PCI support facilities.
In my install entry point, I can succesfully :
- retrieve the device structure : PCIGetDevice()
- configure the different Configuration Registers : PCIWriteConf()
- map the Internal Registers : PCIMapDevice(), which gives me the virtual memory adress of these registers.
But when I try to read or write in these registers (to initialize the device for example), it does not work.
I have a Bus Error which seems to mean that the memory is not mapped properly.
Does anyone has any idea of what is wrong ?
Thanks a lot for any help !
Guillaume
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