From 57d4c30e22b5f35f9103240aa731798a21fe5a24 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= Date: Sat, 11 Feb 2017 17:31:25 +0200 Subject: lynxpoint bd82x6x: Enable PCI-to-PCI bridge MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-on: https://review.coreboot.org/18330 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/southbridge/intel/bd82x6x/pci.c | 9 --------- src/southbridge/intel/lynxpoint/pci.c | 5 ----- 2 files changed, 14 deletions(-) (limited to 'src/southbridge') 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) -- cgit v1.2.3