Pstate: VDM Enablement

Christopher M. Riedl · op-jenkins · commit 212a68631c93 · 2018-08-22T17:55:05.000-05:00
- SGPE stop exit and entry changes to set-up the QPPM VDM registers - CME stop exit and entry changes to enable/disable VDMs during Stop operations - CME code to change VDM VID compare and thresholds during Pstate operations - Compile-time flags to optionally remove Resclk/VDM code (due to size constraints) Change-Id: I44ce0d58788d9ff4eb6337ba739c6a717485342f Original-Change-Id: I1fe8b2231c554b4f181472efab1f5cc45cc087d6 Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40676 Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com> Reviewed-by: Michael S. Floyd <mfloyd@us.ibm.com> Reviewed-by: BRIAN D. VICTOR <brian.d.victor1@ibm.com> Reviewed-by: Gregory S. Still <stillgs@us.ibm.com>
diff --git a/import/chips/p9/procedures/ppe_closed/sgpe/stop_gpe/p9_sgpe_stop_entry.c b/import/chips/p9/procedures/ppe_closed/sgpe/stop_gpe/p9_sgpe_stop_entry.c
@@ -66,6 +66,7 @@ p9_sgpe_stop_entry()
 #if !SKIP_IPC
     uint32_t      rc               = 0;
 #endif
+    sgpeHeader_t* pSgpeImgHdr     = (sgpeHeader_t*)(OCC_SRAM_SGPE_HEADER_ADDR);
 
     //--------------------------------------------------------------------------
     PK_TRACE("+++++ +++++ BEGIN OF STOP ENTRY +++++ +++++");
@@ -925,6 +926,18 @@ p9_sgpe_stop_entry()
         PK_TRACE("Checking status of Local Checkstop");
         GPE_GETSCOM(GPE_SCOM_ADDR_QUAD(EQ_LOCAL_XSTOP_ERR, qloop), local_xstop);
 
+        if(pSgpeImgHdr->g_sgpe_reserve_flags & SGPE_VDM_ENABLE_BIT_POS)
+        {
+            PK_TRACE("Clear Jump Protect Enable (no need to poll DPLL_STAT");
+            GPE_PUTSCOM(GPE_SCOM_ADDR_QUAD(EQ_QPPM_DPLL_CTRL_CLEAR, qloop), BIT64(1));
+
+            PK_TRACE("Write QPPM VDMCR to set Disable and clear Poweron");
+            GPE_PUTSCOM(GPE_SCOM_ADDR_QUAD(PPM_VDMCR, qloop), BIT64(1));
+
+            PK_TRACE("Clear QPPM VDMCFGR");
+            GPE_PUTSCOM(GPE_SCOM_ADDR_QUAD(QPPM_VDMCFGR, qloop), 0);
+        }
+
         //===========================
         MARK_TRAP(SE_STOP_CACHE_CLKS)
         //===========================
