diff options
| author | Michael Brown | 2006-05-17 03:12:11 +0200 |
|---|---|---|
| committer | Michael Brown | 2006-05-17 03:12:11 +0200 |
| commit | 6b6096d28ba0ac47af9070df7ebaf1fdda099a4f (patch) | |
| tree | a2cb39a02b85a9df08f3beb9db52a9045b57804f /src/drivers | |
| parent | Restructured PCI subsystem to fit the new device model. (diff) | |
| download | ipxe-6b6096d28ba0ac47af9070df7ebaf1fdda099a4f.tar.gz ipxe-6b6096d28ba0ac47af9070df7ebaf1fdda099a4f.tar.xz ipxe-6b6096d28ba0ac47af9070df7ebaf1fdda099a4f.zip | |
Strip down i386 PCI configuration space I/O to the bare minimum. A
typical build will now include 880 bytes of PCI support code, compared to
2327 bytes in Etherboot 5.4.
(There is a slight cost of around 5 extra bytes per access to a
non-constant config space address; this should be an overall win.
Driver-specific accesses will usually be to constant addresses, for
which there is no additional cost.)
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/bus/pci.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/src/drivers/bus/pci.c b/src/drivers/bus/pci.c index 853dda64e..222f3eeab 100644 --- a/src/drivers/bus/pci.c +++ b/src/drivers/bus/pci.c @@ -39,15 +39,6 @@ static struct pci_driver pci_drivers_end[0] __table_end ( pci_drivers ); static void pcibus_remove ( struct root_device *rootdev ); /** - * Maximum PCI bus number - * - * Architecture-specific code may know how many buses we have, in - * which case it can overwrite this value. - * - */ -unsigned int pci_max_bus = 0xff; - -/** * Read PCI BAR * * @v pci PCI device @@ -242,13 +233,15 @@ static void unregister_pcidev ( struct pci_device *pci ) { */ static int pcibus_probe ( struct root_device *rootdev ) { struct pci_device *pci = NULL; + unsigned int max_bus; unsigned int bus; unsigned int devfn; - uint8_t hdrtype; + uint8_t hdrtype = 0; uint32_t tmp; int rc; - for ( bus = 0 ; bus <= pci_max_bus ; bus++ ) { + max_bus = pci_max_bus(); + for ( bus = 0 ; bus <= max_bus ; bus++ ) { for ( devfn = 0 ; devfn <= 0xff ; devfn++ ) { /* Allocate struct pci_device */ |