fd6a543d19
This function reads the value of the PCI_CLASS_PROG register for PCI IDE controllers and configures the PCI BARs and/or IDE ioports accordingly. In the case where we switch to legacy mode, the PCI BARs are set to return zero (as suggested in the "PCI IDE Controller" specification), the legacy IDE ioports are enabled, and the PCI interrupt pin cleared to indicate legacy IRQ routing. Conversely when we switch to native mode, the legacy IDE ioports are disabled and the PCI interrupt pin set to indicate native IRQ routing. The contents of the PCI BARs are unspecified, but this is not an issue since if a PCI IDE controller has been switched to native mode then its BARs will need to be programmed. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Message-ID: <20231116103355.588580-3-mark.cave-ayland@ilande.co.uk> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> |
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| .. | ||
| ahci.h | ||
| internal.h | ||
| isa.h | ||
| mmio.h | ||
| pci.h | ||
| piix.h | ||