nb/intel/sandybridge: Relocate PREA-ACT-RD sequence
Tested on Asus P8H61-M PRO, still boots.
Change-Id: Ie5e243380d940ca89857b230e15091ac01fde928
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47622
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/northbridge/intel/sandybridge/raminit_iosav.c b/src/northbridge/intel/sandybridge/raminit_iosav.c
index 25f5ae7..d83dfd8 100644
--- a/src/northbridge/intel/sandybridge/raminit_iosav.c
+++ b/src/northbridge/intel/sandybridge/raminit_iosav.c
@@ -199,6 +199,103 @@
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)
{