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>

2 files changed, 51 insertions, 1 deletions

diff --git a/src/kernel/cpumgr.C b/src/kernel/cpumgr.C
index 27417ef0d..7be1cf2dc 100644
--- a/src/kernel/cpumgr.C
+++ b/src/kernel/cpumgr.C
@@ -11,6 +11,8 @@
 #include <sys/sync.h>
 
 cpu_t* CpuManager::cv_cpus[CpuManager::MAXCPUS] = { NULL };
+bool CpuManager::cv_shutdown_requested = false;
+uint64_t CpuManager::cv_shutdown_status = 0;
 
 CpuManager::CpuManager()
 {
@@ -34,6 +36,12 @@ void CpuManager::init_slave_smp(cpu_t* cpu)
     Singleton<CpuManager>::instance().startSlaveCPU(cpu);
 }
 
+void CpuManager::requestShutdown(uint64_t i_status)
+{
+    cv_shutdown_requested = true;
+    cv_shutdown_status = i_status;
+}
+
 void CpuManager::startCPU(ssize_t i)
 {
     bool currentCPU = false;
@@ -55,6 +63,14 @@ void CpuManager::startCPU(ssize_t i)
 	
 	// Initialize CPU.
 	cpu->cpu = i;
+    if (currentCPU)
+    {
+        cpu->master = true;
+    }
+    else
+    {
+        cpu->master = false;
+    }
 	cpu->scheduler = &Singleton<Scheduler>::instance();
         cpu->scheduler_extra = NULL;
 	cpu->kernel_stack = 
diff --git a/src/kernel/syscall.C b/src/kernel/syscall.C
index 85252a408..bccccac03 100644
--- a/src/kernel/syscall.C
+++ b/src/kernel/syscall.C
@@ -13,9 +13,29 @@
 extern "C"
 void kernel_execute_decrementer()
 {
-    Scheduler* s = CpuManager::getCurrentCPU()->scheduler;
+    cpu_t* c = CpuManager::getCurrentCPU();
+    Scheduler* s = c->scheduler;
     TimeManager::checkReleaseTasks(s);        
     s->returnRunnable();
+
+    if (CpuManager::isShutdownRequested())
+    {
+        // Shutdown was requested
+        if (c->master)
+        {
+            // Write the shutdown status to Scratch SPR 0
+            uint64_t status = CpuManager::getShutdownStatus();
+            printk("Shutdown Requested. Status = 0x%lx\n", status);
+            setScratch0Spr(status);
+        }
+
+        // Make the thread doze
+        while(1)
+        {
+            doze();
+        }
+    }
+
     s->setNextRunnable();
 }
 
@@ -39,6 +59,7 @@ namespace Systemcalls
     void TimeNanosleep(task_t*);
     void FutexWait(task_t *t);
     void FutexWake(task_t *t);
+    void Shutdown(task_t *t);
 
     syscall syscalls[] =
 	{
@@ -63,6 +84,8 @@ namespace Systemcalls
 
             &FutexWait,
             &FutexWake,
+
+            &Shutdown,
 	};
 };
 
@@ -322,4 +345,15 @@ namespace Systemcalls
         TASK_SETRTN(t,started);
     }
 
+    /**
+     * Shutdown all CPUs
+     * @param[in] t:  The current task
+     */
+    void Shutdown(task_t * t)
+    {
+        uint64_t status = static_cast<uint64_t>(TASK_GETARG0(t));
+        CpuManager::requestShutdown(status);
+        TASK_SETRTN(t, 0);
+    }
+
 };