Shutdown and post status on HostBoot completion

Change-Id: If2ab46af85065b29695a1186ed331fd835944eb4
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/204
Tested-by: Jenkins Server
Reviewed-by: Mark W. Wenning <wenning@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

3 files changed, 41 insertions, 11 deletions

diff --git a/src/include/kernel/cpu.H b/src/include/kernel/cpu.H
index 8f6fedb69..2e2a4b8e4 100644
--- a/src/include/kernel/cpu.H
+++ b/src/include/kernel/cpu.H
@@ -21,21 +21,27 @@ class Scheduler;
  */
 struct cpu_t
 {
-        /** Stack to use while in kernel mode. */
+    /** Stack to use while in kernel mode. */
     void* kernel_stack;
-        /** ID of the CPU (PIR value) */
+
+    /** ID of the CPU (PIR value) */
     cpuid_t cpu;
-        
-        /** Pointer to the scheduler for this CPU (may not be unique) */
+
+    /** If the CPU is the master */
+    bool master;
+
+    /** Pointer to the scheduler for this CPU (may not be unique) */
     Scheduler* scheduler;
-        /** Location for scheduler to store per-CPU data, currently used
-         *  for the local run-queue for processor affinity.
-         */
+
+    /** Location for scheduler to store per-CPU data, currently used
+     *  for the local run-queue for processor affinity.
+     */
     void* scheduler_extra;
-        /** Pointer to the idle task for this CPU */
+
+    /** Pointer to the idle task for this CPU */
     task_t* idle_task;
 
-        /** XSCOM mutex to serialize access per CPU */
+    /** XSCOM mutex to serialize access per CPU */
     mutex_t xscom_mutex;
 };
 
diff --git a/src/include/kernel/cpumgr.H b/src/include/kernel/cpumgr.H
index 6ba4bfee1..4416e5815 100644
--- a/src/include/kernel/cpumgr.H
+++ b/src/include/kernel/cpumgr.H
@@ -14,14 +14,29 @@ class CpuManager
 	 *  task structure in SPRG3.
 	 */
 	static cpu_t* getCurrentCPU();
-	static cpu_t* getCpu(size_t i) { return cv_cpus[i]; };
+	static cpu_t* getCpu(size_t i) { return cv_cpus[i]; }
 
 	static void init();
 	static void init_slave_smp(cpu_t*);
 
+    /** @fn requestShutdown
+     *  Requests that all CPUs shutdown
+     */
+    static void requestShutdown(uint64_t i_status);
+
+    /** @fn isShutdownRequested
+     *  Returns if a shutdown of all CPUs was requested
+     */
+    static bool isShutdownRequested() { return cv_shutdown_requested; }
+
+    /** @fn getShutdownStatus
+     *  Returns the status code that needs to be posted during shutdown
+     */
+    static uint32_t getShutdownStatus() { return cv_shutdown_status; }
+
     protected:
 	CpuManager();
-	~CpuManager() {};
+	~CpuManager() {}
 
 	/** @fn startCPU
 	 *  Starts the requested CPU. Default of -1 implies current CPU.
@@ -33,6 +48,12 @@ class CpuManager
 	static cpu_t* cv_cpus[MAXCPUS]; // Need to be able to access this
 					// from start.S to get initial stacks
 					// of secondary cpus / threads.
+
+    // If a shutdown of all CPUs is requested
+    static bool cv_shutdown_requested;
+
+    // The status code that needs to be posted during shutdown
+    static uint64_t cv_shutdown_status;
 };
 
 #endif
diff --git a/src/include/kernel/syscalls.H b/src/include/kernel/syscalls.H
index 26e2bdf75..6473f12b6 100644
--- a/src/include/kernel/syscalls.H
+++ b/src/include/kernel/syscalls.H
@@ -56,6 +56,9 @@ namespace Systemcalls
             /** futex_wake() */
         FUTEX_WAKE,
 
+            /** shutdown() */
+        MISC_SHUTDOWN,
+
 	SYSCALL_MAX
     };