From 8274accde894af7fb2e44ee70662eb632beebaf9 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Tue, 24 Nov 2015 14:11:56 -0600 Subject: southbridge/amd/sb700: Add missing DMA setup step from AMD RRG Change-Id: I412a0e5f2e0686b10a295dd7c0e9b537dc1a0940 Signed-off-by: Timothy Pearson Reviewed-on: https://review.coreboot.org/13154 Tested-by: build bot (Jenkins) Reviewed-by: Felix Held Tested-by: Raptor Engineering Automated Test Stand --- src/southbridge/amd/sb700/early_setup.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/southbridge/amd/sb700') diff --git a/src/southbridge/amd/sb700/early_setup.c b/src/southbridge/amd/sb700/early_setup.c index 3733314f07..76855fba34 100644 --- a/src/southbridge/amd/sb700/early_setup.c +++ b/src/southbridge/amd/sb700/early_setup.c @@ -420,6 +420,11 @@ static void sb700_devices_por_init(void) /* Legacy DMA Prefetch Enhancement, CIM masked it. */ /* pci_write_config8(dev, 0x43, 0x1); */ + /* Enable DMA verify bugfix */ + byte = pci_read_config8(dev, 0x67); + byte |= 0x1 << 1; + pci_write_config8(dev, 0x67, byte); + /* Disabling Legacy USB Fast SMI# */ byte = pci_read_config8(dev, 0x62); byte |= 0x24; -- cgit v1.2.3