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[pci] Support systems with multiple PCI root bridges

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Extend the 16-bit PCI bus:dev.fn address to a 32-bit seg:bus:dev.fn
address, assuming a segment value of zero in contexts where multiple
segments are unsupported by the underlying data structures (e.g. in
the iBFT or BOFM tables).

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2016-06-09 09:36:28 +01:00
parent 2c197517f2
commit f76210961c
9 changed files with 160 additions and 42 deletions
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6
src/arch/x86/core/pcidirect.c
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@@ -36,10 +36,12 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
* Prepare for Type 1 PCI configuration space access
*
* @v pci PCI device
* @v where Location within PCI configuration space
* @v where Location within PCI configuration space
*/
void pcidirect_prepare ( struct pci_device *pci, int where ) {
outl ( ( 0x80000000 | ( pci->busdevfn << 8 ) | ( where & ~3 ) ),
uint16_t busdevfn = ( pci->busdevfn & 0xffff );
outl ( ( 0x80000000 | ( busdevfn << 8 ) | ( where & ~3 ) ),
PCIDIRECT_CONFIG_ADDRESS );
}