diff options
Diffstat (limited to 'src/southbridge/nvidia/ck804/early_setup_car.c')
| -rw-r--r-- | src/southbridge/nvidia/ck804/early_setup_car.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/southbridge/nvidia/ck804/early_setup_car.c b/src/southbridge/nvidia/ck804/early_setup_car.c index 8065d20fdb..87fdbdd4d6 100644 --- a/src/southbridge/nvidia/ck804/early_setup_car.c +++ b/src/southbridge/nvidia/ck804/early_setup_car.c @@ -142,7 +142,15 @@ static void ck804_early_setup(unsigned ck804_num, unsigned *busn, CK804_MB_SETUP #endif -#ifndef CK804_SKIP_PCI_REG_78_INIT +#if IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AMDFAM10) + /* + * Avoid crash (complete with severe memory corruption!) during initial CAR boot + * in ck804_early_setup_x() on Fam10h systems by not touching 0x78. + * Interestingly once the system is fully booted into Linux this can be set, but + * not before! Apparently something isn't initialized but the amount of effort + * required to fix this is non-negligible and of unknown real-world benefit + */ +#else RES_PCI_IO, PCI_ADDR(0, 1, 0, 0x78), 0xc0ffffff, 0x19000000, #endif RES_PCI_IO, PCI_ADDR(0, 1, 0, 0xe0), 0xfffffeff, 0x00000100, @@ -239,6 +247,10 @@ static void ck804_early_setup(unsigned ck804_num, unsigned *busn, RES_PCI_IO, PCI_ADDR(0, 9, 0, 0x4c), 0xfe00ffff, 0x00440000, RES_PCI_IO, PCI_ADDR(0, 9, 0, 0x74), 0xffffffc0, 0x00000000, + /* + * Avoid touching 0x78 for CONFIG_NORTHBRIDGE_AMD_AMDFAM10 for + * non-primary chains too??? + */ RES_PCI_IO, PCI_ADDR(0, 1, 0, 0x78), 0xc0ffffff, 0x20000000, RES_PCI_IO, PCI_ADDR(0, 1, 0, 0xe0), 0xfffffeff, 0x00000000, RES_PCI_IO, PCI_ADDR(0, 1, 0, 0xe8), 0xffffff00, 0x000000ff, |