diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-02-11 17:31:25 +0200 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-02-23 18:36:24 +0100 |
| commit | 57d4c30e22b5f35f9103240aa731798a21fe5a24 (patch) | |
| tree | 862bf21c9ff1fa975fa7ad0d6db14339266de11a /src/southbridge | |
| parent | a5c029f235d07707f2d6d9600c0ea3af55c88b81 (diff) | |
lynxpoint bd82x6x: Enable PCI-to-PCI bridge
Once the PCI command register is written the bridge forwards
future IO and memory regions, as programmed in the respective base
and limit registers, to the secondary PCI bus.
It was previously argumented this is copy-paste and never known
to be required for these more recent platforms:
https://review.coreboot.org/#/c/2706/
Change-Id: Ic8911500a30bc83587af8d4b393b66783fa52e18
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/18330
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/intel/bd82x6x/pci.c | 9 | ||||
| -rw-r--r-- | src/southbridge/intel/lynxpoint/pci.c | 5 |
2 files changed, 0 insertions, 14 deletions
diff --git a/src/southbridge/intel/bd82x6x/pci.c b/src/southbridge/intel/bd82x6x/pci.c index 68c4bb24d9..85e431e619 100644 --- a/src/southbridge/intel/bd82x6x/pci.c +++ b/src/southbridge/intel/bd82x6x/pci.c @@ -59,7 +59,6 @@ static void pci_init(struct device *dev) pci_write_config16(dev, SECSTS, reg16); } -#undef PCI_BRIDGE_UPDATE_COMMAND static void ich_pci_dev_enable_resources(struct device *dev) { const struct pci_operations *ops; @@ -79,16 +78,8 @@ static void ich_pci_dev_enable_resources(struct device *dev) command = pci_read_config16(dev, PCI_COMMAND); command |= dev->command; -#ifdef PCI_BRIDGE_UPDATE_COMMAND - /* If we write to PCI_COMMAND, on some systems - * this will cause the ROM and APICs not being visible - * anymore. - */ printk(BIOS_DEBUG, "%s cmd <- %02x\n", dev_path(dev), command); pci_write_config16(dev, PCI_COMMAND, command); -#else - printk(BIOS_DEBUG, "%s cmd <- %02x (NOT WRITTEN!)\n", dev_path(dev), command); -#endif } static void ich_pci_bus_enable_resources(struct device *dev) diff --git a/src/southbridge/intel/lynxpoint/pci.c b/src/southbridge/intel/lynxpoint/pci.c index 68c4bb24d9..e2e052b270 100644 --- a/src/southbridge/intel/lynxpoint/pci.c +++ b/src/southbridge/intel/lynxpoint/pci.c @@ -59,7 +59,6 @@ static void pci_init(struct device *dev) pci_write_config16(dev, SECSTS, reg16); } -#undef PCI_BRIDGE_UPDATE_COMMAND static void ich_pci_dev_enable_resources(struct device *dev) { const struct pci_operations *ops; @@ -79,16 +78,12 @@ static void ich_pci_dev_enable_resources(struct device *dev) command = pci_read_config16(dev, PCI_COMMAND); command |= dev->command; -#ifdef PCI_BRIDGE_UPDATE_COMMAND /* If we write to PCI_COMMAND, on some systems * this will cause the ROM and APICs not being visible * anymore. */ printk(BIOS_DEBUG, "%s cmd <- %02x\n", dev_path(dev), command); pci_write_config16(dev, PCI_COMMAND, command); -#else - printk(BIOS_DEBUG, "%s cmd <- %02x (NOT WRITTEN!)\n", dev_path(dev), command); -#endif } static void ich_pci_bus_enable_resources(struct device *dev) |