Hi Serhii,
mapping the registers would be typically done in the driver's dev_add entry
point.
* get the parent session using ddf_dev_parent_sess_get()
* get list of HW resources (hw_res_list_parsed_init() / hw_res_get_list_
parsed()
- memory ranges, I/O ranges, interrupts
* map registers using pio_enable()
* access registers using pio_read_x() / pio_write_x()
Handling interrupts:
* prepare IRQ pseudocode and handler function
* register_interrupt_handler()
* hw_res_enable_interrupt()
Handling DMA
* dmamem_map_anonymous() / dmamem_unmap_anonymous()
If you'd like to see an example how this is done, you can check, for
example:
* uspace/drv/audio/hdaudio/hdaudio.c : hda_dev_add()
* uspace/drv/nic/e1k/e1k.c : e1000_dev_add()
Hope this helps,
Jiri
---------- Původní e-mail ----------
Od: Serhii Sakhno <[email protected]>
Komu: [email protected]
Datum: 9. 5. 2022 10:38:21
Předmět: [HelenOS-devel] Work with PCI registers
"I read an article on Wiki about writing drivers and checked existing
drivers, but I did not understand some things with PCI/PCIe buses. How
to map needed registers?
Regards,
Serhii
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