Memory Power Control when entering and exiting IPS (Idle Power Save)

memory power control settings for IPS/default modes - as defined by
memory config data packet version 0x21 - are applied to memory
power control registers of all configured ports whenever the OCC
enters/exits IPS, respectively.

Change-Id: I56514bb8cbab80c6d4877edc74db96f3b011e523
RTC: 165546
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/38294
Reviewed-by: Martha Broyles <mbroyles@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christopher J. Cain <cjcain@us.ibm.com>
Reviewed-by: Wael El-Essawy <welessa@us.ibm.com>

4 files changed, 11 insertions, 1 deletions

diff --git a/src/occ_405/amec/amec_init.c b/src/occ_405/amec/amec_init.c
index eb08409..7343c2f 100644
--- a/src/occ_405/amec/amec_init.c
+++ b/src/occ_405/amec/amec_init.c
@@ -348,6 +348,9 @@ void amec_init_gamec_struct(void)
 //  g_amec->ptr_probe250us[6] = g_amec->ptr_probe250us[6]+2; // Point to low 16 bits of testscom1
 //  g_amec->ptr_probe250us[7] = &g_amec->task_centaur_data_count;
 
+  // Initialize the current_mem_pwr_ctl to indicate that memory power control is not supported
+  // update memory control registers only if new ips/default memory power control is different
+  g_amec->sys.current_mem_pwr_ctl = MEM_PWR_CTL_NO_SUPPORT;
 }
 
 // Function Specification
diff --git a/src/occ_405/amec/amec_master_smh.c b/src/occ_405/amec/amec_master_smh.c
index f00498f..0b024ec 100755
--- a/src/occ_405/amec/amec_master_smh.c
+++ b/src/occ_405/amec/amec_master_smh.c
@@ -561,7 +561,7 @@ void amec_mst_ips_main(void)
             // Reset the following parameters
             g_amec->mst_ips_parms.active = 0;
             G_ips_entry_count = 0;
-            g_amec->mst_ips_parms.freq_request = g_amec->sys.fmax;
+            g_amec->mst_ips_parms.freq_request = 0; // No IPS Frequency request when IPS is disabled
 
             break;
         }
diff --git a/src/occ_405/amec/amec_slave_smh.c b/src/occ_405/amec/amec_slave_smh.c
index b2e37d7..abdede7 100755
--- a/src/occ_405/amec/amec_slave_smh.c
+++ b/src/occ_405/amec/amec_slave_smh.c
@@ -58,6 +58,7 @@
 #include <occhw_async.h>
 #include <wof.h>
 #include <pgpe_interface.h>
+#include <memory_power_control.h>
 
 //*************************************************************************/
 // Externs
@@ -347,6 +348,9 @@ void amec_slv_common_tasks_post(void)
         // Call amec_power_control
         amec_power_control();
 
+        // Apply memory power control, if needed.
+        amec_mem_power_control();
+
         // Call the OCC slave's processor voting box
         amec_slv_proc_voting_box();
 
diff --git a/src/occ_405/amec/amec_sys.h b/src/occ_405/amec/amec_sys.h
index 5759f11..66d1b84 100755
--- a/src/occ_405/amec/amec_sys.h
+++ b/src/occ_405/amec/amec_sys.h
@@ -389,6 +389,9 @@ typedef struct
 
   // Memory Throttle Sent Last time to DIMM Throttle Register
   dimm_n_value_t current_dimm_n_values[NUM_NIMBUS_MC_PAIRS][MAX_NUM_MCU_PORTS];
+
+  // Current Memory Power Control values (applied last through GPE1)
+  uint8_t current_mem_pwr_ctl;
 } amec_systemwide_t;