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southbridge/amd/sb700: Add missing DMA setup step from AMD RRG 

Change-Id: I412a0e5f2e0686b10a295dd7c0e9b537dc1a0940
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/13154
Tested-by: build bot (Jenkins)
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
This commit is contained in:
Timothy Pearson 2015-11-24 14:11:56 -06:00 committed by Martin Roth
parent 2ba84cd7de
commit 8274accde8
1 changed files with 5 additions and 0 deletions
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5
src/southbridge/amd/sb700/early_setup.c
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@ -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;