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intel raminit: rename register

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Found while doing code review.

Rename reg_4004_b30 to cmd_stretch.
Found in 4th-gen-core-family-desktop-vol-2-datasheet.pdf chapter 4.2.1.

Change-Id: Ib07059625ed458332708562e836803f2b587d5d8
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: http://review.coreboot.org/10789
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
This commit is contained in:
Patrick Rudolph 2015-07-03 21:11:25 +02:00 committed by Stefan Reinauer
parent ddb8f80894
commit 8c2f39714f
1 changed files with 9 additions and 8 deletions
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17
src/northbridge/intel/sandybridge/raminit_native.c
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@ -136,7 +136,7 @@ typedef struct ramctr_timing_st {
int ref_card_offset[NUM_CHANNELS];
u32 mad_dimm[NUM_CHANNELS];
int channel_size_mb[NUM_CHANNELS];
u32 reg_4004_b30[NUM_CHANNELS];
u32 cmd_stretch[NUM_CHANNELS];
int reg_c14_offset;
int reg_320c_range_threshold;
@ -2683,7 +2683,7 @@ static void reprogram_320c(ramctr_timing * ctrl)
#define MIN_C320C_LEN 13
static int try_reg_4004_b30(ramctr_timing * ctrl, int r4004b30)
static int try_cmd_stretch(ramctr_timing * ctrl, int cmd_stretch)
{
struct ram_rank_timings saved_timings[NUM_CHANNELS][NUM_SLOTRANKS];
int channel, slotrank;
@ -2695,7 +2695,7 @@ static int try_reg_4004_b30(ramctr_timing * ctrl, int r4004b30)
}
FOR_ALL_POPULATED_CHANNELS {
ctrl->reg_4004_b30[channel] = r4004b30;
ctrl->cmd_stretch[channel] = cmd_stretch;
}
FOR_ALL_POPULATED_CHANNELS
@ -2706,14 +2706,14 @@ static int try_reg_4004_b30(ramctr_timing * ctrl, int r4004b30)
| (ctrl->tWTR << 12)
| (ctrl->tFAW << 16)
| (ctrl->tWR << 24)
| (ctrl->reg_4004_b30[channel] << 30);
| (ctrl->cmd_stretch[channel] << 30);
FOR_ALL_CHANNELS {
int delta = 0;
if (ctrl->reg_4004_b30[channel] == 2)
if (ctrl->cmd_stretch[channel] == 2)
delta = 2;
else if (ctrl->reg_4004_b30[channel] == 0)
else if (ctrl->cmd_stretch[channel] == 0)
delta = 4;
FOR_ALL_POPULATED_RANKS {
@ -2764,7 +2764,8 @@ static void command_training(ramctr_timing * ctrl)
write32(DEFAULT_MCHBAR + 0x4288 + 0x400 * channel, 0x1f);
}
if (!try_reg_4004_b30(ctrl, 0) && !try_reg_4004_b30(ctrl, 2))
/* try command rate 1T and 2T */
if (!try_cmd_stretch(ctrl, 0) && !try_cmd_stretch(ctrl, 2))
die("c320c discovery failed");
FOR_ALL_POPULATED_CHANNELS {
@ -3621,7 +3622,7 @@ static void restore_timings(ramctr_timing * ctrl)
| (ctrl->tWTR << 12)
| (ctrl->tFAW << 16)
| (ctrl->tWR << 24)
| (ctrl->reg_4004_b30[channel] << 30);
| (ctrl->cmd_stretch[channel] << 30);
udelay(1);