diff options
Diffstat (limited to 'src/northbridge/intel/sandybridge')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit.c | 46 |
1 files changed, 32 insertions, 14 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c index 8a287c184c..aae963e239 100644 --- a/src/northbridge/intel/sandybridge/raminit.c +++ b/src/northbridge/intel/sandybridge/raminit.c @@ -498,6 +498,28 @@ static u32 get_COMP2(u32 tCK) return frq_comp2_map[get_FRQ(tCK) - 3]; } +static u32 get_XOVER_CLK(u8 rankmap) +{ + return rankmap << 24; +} + +static u32 get_XOVER_CMD(u8 rankmap) +{ + u32 reg; + + // enable xover cmd + reg = 0x4000; + + // enable xover ctl + if (rankmap & 0x3) + reg |= 0x20000; + + if (rankmap & 0xc) + reg |= 0x4000000; + + return reg; +} + static void dram_timing(ramctr_timing * ctrl) { u8 val; @@ -699,20 +721,13 @@ static void dram_xover(ramctr_timing * ctrl) FOR_ALL_CHANNELS { // enable xover clk + reg = get_XOVER_CLK(ctrl->rankmap[channel]); printk(BIOS_DEBUG, "[%x] = %x\n", channel * 0x100 + 0xc14, - (ctrl->rankmap[channel] << 24)); - MCHBAR32(channel * 0x100 + 0xc14) = (ctrl->rankmap[channel] << 24); + reg); + MCHBAR32(channel * 0x100 + 0xc14) = reg; - // enable xover ctl - reg = 0; - if (ctrl->rankmap[channel] & 0x5) { - reg |= 0x20000; - } - if (ctrl->rankmap[channel] & 0xa) { - reg |= 0x4000000; - } - // enable xover cmd - reg |= 0x4000; + // enable xover ctl & xover cmd + reg = get_XOVER_CMD(ctrl->rankmap[channel]); printk(BIOS_DEBUG, "[%x] = %x\n", 0x100 * channel + 0x320c, reg); MCHBAR32(0x100 * channel + 0x320c) = reg; @@ -1493,14 +1508,16 @@ static void program_timings(ramctr_timing * ctrl, int channel) break; } - reg32 = (1 << 17) | (1 << 14); + /* enable CMD XOVER */ + reg32 = get_XOVER_CMD(ctrl->rankmap[channel]); reg32 |= ((slot320c[0] & 0x3f) << 6) | ((slot320c[0] & 0x40) << 9); reg32 |= (slot320c[1] & 0x7f) << 18; reg32 |= (full_shift & 0x3f) | ((full_shift & 0x40) << 6); MCHBAR32(0x320c + 0x100 * channel) = reg32; - reg_c14 = ctrl->rankmap[channel] << 24; + /* enable CLK XOVER */ + reg_c14 = get_XOVER_CLK(ctrl->rankmap[channel]); reg_c18 = 0; FOR_ALL_POPULATED_RANKS { @@ -1510,6 +1527,7 @@ static void program_timings(ramctr_timing * ctrl, int channel) if (shift < 0) shift = 0; offset_val_c14 = ctrl->reg_c14_offset + shift; + /* set CLK phase shift */ reg_c14 |= (offset_val_c14 & 0x3f) << (6 * slotrank); reg_c18 |= ((offset_val_c14 >> 6) & 1) << slotrank; } |