diff options
Diffstat (limited to 'src/include/ipxe/pci_io.h')
| -rw-r--r-- | src/include/ipxe/pci_io.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/src/include/ipxe/pci_io.h b/src/include/ipxe/pci_io.h index 2dcdd9b28..91359cec8 100644 --- a/src/include/ipxe/pci_io.h +++ b/src/include/ipxe/pci_io.h @@ -14,6 +14,20 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include <ipxe/iomap.h> #include <config/ioapi.h> +struct pci_device; + +/** A PCI bus:dev.fn address range */ +struct pci_range { + /** Starting bus:dev.fn address */ + uint32_t start; + /** Number of bus:dev.fn addresses within this range */ + unsigned int count; +}; + +#define PCI_BUSDEVFN( segment, bus, slot, func ) \ + ( ( (segment) << 16 ) | ( (bus) << 8 ) | \ + ( (slot) << 3 ) | ( (func) << 0 ) ) + /** * Calculate static inline PCI I/O API function name * @@ -51,11 +65,12 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include <bits/pci_io.h> /** - * Determine number of PCI buses within system + * Find next PCI bus:dev.fn address range in system * - * @ret num_bus Number of buses + * @v busdevfn Starting PCI bus:dev.fn address + * @v range PCI bus:dev.fn address range to fill in */ -int pci_num_bus ( void ); +void pci_discover ( uint32_t busdevfn, struct pci_range *range ); /** * Read byte from PCI configuration space |