Execute 'doze' in idle loop.

Change-Id: Ifd611129c2d7173b5e0dec36c870e06a4d851009
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/1384
Tested-by: Jenkins Server
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

4 files changed, 40 insertions, 34 deletions

diff --git a/src/include/kernel/cpumgr.H b/src/include/kernel/cpumgr.H
index bbd16fcd8..8cf6d0fc3 100644
--- a/src/include/kernel/cpumgr.H
+++ b/src/include/kernel/cpumgr.H
@@ -111,10 +111,11 @@ class CpuManager
         /** Desired value for LPCR after wakeup.
          *
          *  bit 49 - Wake-up from external interrupt.
+         *  bit 50 - Wake-up from decrementer.
          *  bit 51 - Wake-up from machine check.
          *  bit 60, 61 - LPES(0,1) = 1 (see ISA).
          */
-        static const uint64_t WAKEUP_LPCR_VALUE =   0x000000000000500C;
+        static const uint64_t WAKEUP_LPCR_VALUE =   0x000000000000700C;
 
     protected:
         CpuManager();
diff --git a/src/include/kernel/ppcconsts.S b/src/include/kernel/ppcconsts.S
index 89a52a008..1568bb911 100644
--- a/src/include/kernel/ppcconsts.S
+++ b/src/include/kernel/ppcconsts.S
@@ -1,25 +1,25 @@
 #   IBM_PROLOG_BEGIN_TAG
 #   This is an automatically generated prolog.
-#
+# 
 #   $Source: src/include/kernel/ppcconsts.S $
-#
+# 
 #   IBM CONFIDENTIAL
-#
-#   COPYRIGHT International Business Machines Corp. 2010 - 2011
-#
+# 
+#   COPYRIGHT International Business Machines Corp. 2010-2012
+# 
 #   p1
-#
+# 
 #   Object Code Only (OCO) source materials
 #   Licensed Internal Code Source Materials
 #   IBM HostBoot Licensed Internal Code
-#
+# 
 #   The source code for this program is not published or other-
 #   wise divested of its trade secrets, irrespective of what has
 #   been deposited with the U.S. Copyright Office.
-#
+# 
 #   Origin: 30
-#
-#   IBM_PROLOG_END
+# 
+#   IBM_PROLOG_END_TAG
 #*--------------------------------------------------------------------*#
 #*  Register Constants                                                *#
 #*--------------------------------------------------------------------*#
@@ -206,8 +206,9 @@
 .set TASK_CR, TASK_LR+8
 .set TASK_CTR, TASK_CR+8
 .set TASK_XER, TASK_CTR+8
+.set TASK_MSR_MASK, TASK_XER+8
 
-.set TASK_FP_CONTEXT, TASK_XER+8
+.set TASK_FP_CONTEXT, TASK_MSR_MASK+8
 .set TASK_FPR_0, 0
 .set TASK_FPR_1, TASK_FPR_0+8
 .set TASK_FPR_2, TASK_FPR_1+8
diff --git a/src/include/kernel/syscalls.H b/src/include/kernel/syscalls.H
index 28e13628c..5523fc158 100644
--- a/src/include/kernel/syscalls.H
+++ b/src/include/kernel/syscalls.H
@@ -92,6 +92,8 @@ namespace Systemcalls
         MISC_CPUSTARTCORE,
             /** cpu_spr_value() */
         MISC_CPUSPRVALUE,
+            /** cpu_doze() - Hidden syscall */
+        MISC_CPUDOZE,
 
             /** mm_alloc_block() */
         MM_ALLOC_BLOCK,
diff --git a/src/include/kernel/task.H b/src/include/kernel/task.H
index 9ff0401ba..f9ceab994 100644
--- a/src/include/kernel/task.H
+++ b/src/include/kernel/task.H
@@ -1,25 +1,26 @@
-//  IBM_PROLOG_BEGIN_TAG
-//  This is an automatically generated prolog.
-//
-//  $Source: src/include/kernel/task.H $
-//
-//  IBM CONFIDENTIAL
-//
-//  COPYRIGHT International Business Machines Corp. 2010 - 2011
-//
-//  p1
-//
-//  Object Code Only (OCO) source materials
-//  Licensed Internal Code Source Materials
-//  IBM HostBoot Licensed Internal Code
-//
-//  The source code for this program is not published or other-
-//  wise divested of its trade secrets, irrespective of what has
-//  been deposited with the U.S. Copyright Office.
-//
-//  Origin: 30
-//
-//  IBM_PROLOG_END
+/*  IBM_PROLOG_BEGIN_TAG
+ *  This is an automatically generated prolog.
+ *
+ *  $Source: src/include/kernel/task.H $
+ *
+ *  IBM CONFIDENTIAL
+ *
+ *  COPYRIGHT International Business Machines Corp. 2010-2012
+ *
+ *  p1
+ *
+ *  Object Code Only (OCO) source materials
+ *  Licensed Internal Code Source Materials
+ *  IBM HostBoot Licensed Internal Code
+ *
+ *  The source code for this program is not published or other-
+ *  wise divested of its trade secrets, irrespective of what has
+ *  been deposited with the U.S. Copyright Office.
+ *
+ *  Origin: 30
+ *
+ *  IBM_PROLOG_END_TAG
+ */
 /** @file task.H
  *  @brief Defines kernel information about tasks.
  */
@@ -42,6 +43,7 @@ struct context_t
     uint64_t cr;
     uint64_t ctr;
     uint64_t xer;
+    uint64_t msr_mask; // XOR mask applied to MSR.
 };
 
 /** @struct context_fp_t