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Adds a CONFIG_MAX_PCI_BUSES to pci_locate_device()

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Default is 255.

This allows mainboard configs for working across various groups
of boards that differ a device that may not loaded.

If you search for a device that is not loaded and max buses is 255
then there can be up to a 8 second delay to search the entire PCI space.
Board configs that know thier max bus can limit this search space.


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2273 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Richard Smith
2006-04-23 23:12:21 +00:00
parent 2f19800268
commit 2a7352cb9d
3 changed files with 16 additions and 1 deletions
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2
src/arch/i386/include/arch/romcc_io.h
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@@ -168,7 +168,7 @@ static inline __attribute__((always_inline)) void pci_write_config32(device_t de
#define PCI_DEV_INVALID (0xffffffffU)
static device_t pci_locate_device(unsigned pci_id, device_t dev)
{
for(; dev <= PCI_DEV(255, 31, 7); dev += PCI_DEV(0,0,1)) {
for(; dev <= PCI_DEV(CONFIG_MAX_PCI_BUSES, 31, 7); dev += PCI_DEV(0,0,1)) {
unsigned int id;
id = pci_read_config32(dev, 0);
if (id == pci_id) {