diff options
Diffstat (limited to 'src/northbridge/intel/sandybridge/raminit_iosav.c')
-rw-r--r-- | src/northbridge/intel/sandybridge/raminit_iosav.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit_iosav.c b/src/northbridge/intel/sandybridge/raminit_iosav.c index 25f5ae705d..d83dfd8e9a 100644 --- a/src/northbridge/intel/sandybridge/raminit_iosav.c +++ b/src/northbridge/intel/sandybridge/raminit_iosav.c @@ -199,6 +199,103 @@ void iosav_write_read_mpr_sequence( iosav_write_sequence(channel, sequence, ARRAY_SIZE(sequence)); } +void iosav_write_prea_act_read_sequence(ramctr_timing *ctrl, int channel, int slotrank) +{ + const struct iosav_ssq sequence[] = { + /* DRAM command PREA */ + [0] = { + .sp_cmd_ctrl = { + .command = IOSAV_PRE, + .ranksel_ap = 1, + }, + .subseq_ctrl = { + .cmd_executions = 1, + .cmd_delay_gap = 3, + .post_ssq_wait = ctrl->tRP, + .data_direction = SSQ_NA, + }, + .sp_cmd_addr = { + .address = 1024, + .rowbits = 6, + .bank = 0, + .rank = slotrank, + }, + .addr_update = { + .addr_wrap = 18, + }, + }, + /* DRAM command ACT */ + [1] = { + .sp_cmd_ctrl = { + .command = IOSAV_ACT, + .ranksel_ap = 1, + }, + .subseq_ctrl = { + .cmd_executions = 8, + .cmd_delay_gap = MAX(ctrl->tRRD, (ctrl->tFAW >> 2) + 1), + .post_ssq_wait = ctrl->CAS, + .data_direction = SSQ_NA, + }, + .sp_cmd_addr = { + .address = 0, + .rowbits = 6, + .bank = 0, + .rank = slotrank, + }, + .addr_update = { + .inc_bank = 1, + .addr_wrap = 18, + }, + }, + /* DRAM command RD */ + [2] = { + .sp_cmd_ctrl = { + .command = IOSAV_RD, + .ranksel_ap = 1, + }, + .subseq_ctrl = { + .cmd_executions = 500, + .cmd_delay_gap = 4, + .post_ssq_wait = MAX(ctrl->tRTP, 8), + .data_direction = SSQ_RD, + }, + .sp_cmd_addr = { + .address = 0, + .rowbits = 0, + .bank = 0, + .rank = slotrank, + }, + .addr_update = { + .inc_addr_8 = 1, + .addr_wrap = 18, + }, + }, + /* DRAM command PREA */ + [3] = { + .sp_cmd_ctrl = { + .command = IOSAV_PRE, + .ranksel_ap = 1, + }, + .subseq_ctrl = { + .cmd_executions = 1, + .cmd_delay_gap = 3, + .post_ssq_wait = ctrl->tRP, + .data_direction = SSQ_NA, + }, + .sp_cmd_addr = { + .address = 1024, + .rowbits = 6, + .bank = 0, + .rank = slotrank, + }, + .addr_update = { + .addr_wrap = 18, + }, + }, + }; + iosav_write_sequence(channel, sequence, ARRAY_SIZE(sequence)); +} + void iosav_write_jedec_write_leveling_sequence( ramctr_timing *ctrl, int channel, int slotrank, int bank, u32 mr1reg) { |