diff options
Diffstat (limited to 'src/northbridge/amd/amdk8')
| -rw-r--r-- | src/northbridge/amd/amdk8/misc_control.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/northbridge/amd/amdk8/misc_control.c b/src/northbridge/amd/amdk8/misc_control.c index 045f5cef06..9d4e968267 100644 --- a/src/northbridge/amd/amdk8/misc_control.c +++ b/src/northbridge/amd/amdk8/misc_control.c @@ -50,7 +50,19 @@ static void misc_control_init(struct device *dev) cmd = 0x04e20707; pci_write_config32(dev, 0xd4, cmd ); } -#if 1 + +/* + * FIXME: This preprocessor check is a mere workaround. + * The right fix is to walk over all links on all nodes + * and set the FIFO read pointer optimization value to + * 0x25 for each link connected to an AMD HT device. + * + * The reason this is only enabled for machines with more + * than one CPU is that Athlon64 machines don't have the + * link at all that is optimized in the code. + */ + +#if CONFIG_MAX_CPUS > 1 cmd = pci_read_config32(dev, 0xdc); if((cmd & 0x0000ff00) != 0x02500) { cmd &= 0xffff00ff; |