diff options
Diffstat (limited to 'src/southbridge/amd/sb700/early_setup.c')
| -rw-r--r-- | src/southbridge/amd/sb700/early_setup.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/southbridge/amd/sb700/early_setup.c b/src/southbridge/amd/sb700/early_setup.c index d25599ea2e..2828bbed51 100644 --- a/src/southbridge/amd/sb700/early_setup.c +++ b/src/southbridge/amd/sb700/early_setup.c @@ -439,6 +439,14 @@ static void sb700_devices_por_init(void) /*pci_write_config8(dev, 0x79, 0x4F); */ pci_write_config8(dev, 0x78, 0xFF); + if (IS_ENABLED(CONFIG_SOUTHBRIDGE_AMD_SB700_DISABLE_ISA_DMA)) { + printk(BIOS_DEBUG, "%s: Disabling ISA DMA support\n", __func__); + /* Disable LPC ISA DMA Capability */ + byte = pci_read_config8(dev, 0x78); + byte &= ~(1 << 0); + pci_write_config8(dev, 0x78, byte); + } + /* Set smbus iospace enable, I don't know why write 0x04 into reg5 that is reserved */ pci_write_config16(dev, 0x4, 0x0407); |