diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/x4x/raminit_ddr23.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/northbridge/intel/x4x/raminit_ddr23.c b/src/northbridge/intel/x4x/raminit_ddr23.c index 119eccd473..9fb05b0145 100644 --- a/src/northbridge/intel/x4x/raminit_ddr23.c +++ b/src/northbridge/intel/x4x/raminit_ddr23.c @@ -289,7 +289,12 @@ static void ctrlset1(u8 ch, const struct dll_setting *setting) static void ctrlset2(u8 ch, const struct dll_setting *setting) { - MCHBAR32_AND_OR(0x400*ch + 0x598, ~0x18c00000, + /* + * MRC uses an incorrect mask when programming this register, but + * the reset default value is zero and it is only programmed once. + * As it makes no difference, we can safely use the correct mask. + */ + MCHBAR32_AND_OR(0x400*ch + 0x598, ~0xf000, (setting->clk_delay << 14) | (setting->db_sel << 12) | (setting->db_en << 13)); @@ -299,7 +304,12 @@ static void ctrlset2(u8 ch, const struct dll_setting *setting) static void ctrlset3(u8 ch, const struct dll_setting *setting) { - MCHBAR32_AND_OR(0x400*ch + 0x598, ~0x18c00000, + /* + * MRC uses an incorrect mask when programming this register, but + * the reset default value is zero and it is only programmed once. + * As it makes no difference, we can safely use the correct mask. + */ + MCHBAR32_AND_OR(0x400*ch + 0x598, ~0xf00, (setting->clk_delay << 10) | (setting->db_sel << 8) | (setting->db_en << 9)); |