diff options
Diffstat (limited to 'src/northbridge/intel/nehalem/northbridge.c')
| -rw-r--r-- | src/northbridge/intel/nehalem/northbridge.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/src/northbridge/intel/nehalem/northbridge.c b/src/northbridge/intel/nehalem/northbridge.c index 7b9283fb90..6ec76e1443 100644 --- a/src/northbridge/intel/nehalem/northbridge.c +++ b/src/northbridge/intel/nehalem/northbridge.c @@ -229,6 +229,28 @@ static void northbridge_init(struct device *dev) northbridge_dmi_init(dev); } +/* Disable unused PEG devices based on devicetree before PCI enumeration */ +static void nehalem_init(void *const chip_info) +{ + u32 deven_mask = UINT32_MAX; + const struct device *dev; + + dev = pcidev_on_root(1, 0); + if (!dev || !dev->enabled) { + printk(BIOS_DEBUG, "Disabling PEG10.\n"); + deven_mask &= ~DEVEN_PEG10; + } + dev = pcidev_on_root(2, 0); + if (!dev || !dev->enabled) { + printk(BIOS_DEBUG, "Disabling IGD.\n"); + deven_mask &= ~DEVEN_IGD; + } + const struct device *const d0f0 = pcidev_on_root(0, 0); + if (d0f0) + pci_update_config32(d0f0, D0F0_DEVEN, deven_mask, 0); + +} + static struct pci_operations intel_pci_ops = { .set_subsystem = pci_dev_set_subsystem, }; @@ -269,5 +291,6 @@ static void enable_dev(struct device *dev) struct chip_operations northbridge_intel_nehalem_ops = { CHIP_NAME("Intel i7 (Nehalem) integrated Northbridge") - .enable_dev = enable_dev, + .enable_dev = enable_dev, + .init = nehalem_init, }; |