Update scratch SPR #s for P8.

Change-Id: Ia063a66b705b3272b7578ece420c84ac9c4c3d26
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/224
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Tested-by: Jenkins Server

1 files changed, 43 insertions, 0 deletions

diff --git a/src/kernel/misc.C b/src/kernel/misc.C
new file mode 100644
index 000000000..56f5f563c
--- /dev/null
+++ b/src/kernel/misc.C
@@ -0,0 +1,43 @@
+#include <kernel/misc.H>
+#include <kernel/cpumgr.H>
+#include <kernel/cpuid.H>
+#include <kernel/console.H>
+
+namespace KernelMisc
+{
+    void shutdown()
+    {
+        // Update scratch SPR for shutdown status.
+        cpu_t* c = CpuManager::getCurrentCPU();
+        if (c->master)
+        {
+            register uint64_t status = CpuManager::getShutdownStatus();
+            printk("Shutdown Requested. Status = 0x%lx\n", status);
+
+            register uint64_t scratch_address = 0; // Values from PervSpec
+            switch(CpuID::getCpuType())
+            {
+                case CORE_POWER8_SALERNO:
+                case CORE_POWER8_VENICE:
+                    scratch_address = 0x40;
+                    break;
+
+                case CORE_POWER7:
+                case CORE_POWER7_PLUS:
+                default:
+                    scratch_address = 0x20;
+                    break;
+            }
+
+            asm volatile("mtspr 276, %0\n"
+                         "isync\n"
+                         "mtspr 277, %1"
+                         :: "r" (scratch_address), "r" (status));
+        }
+
+        while(1)
+        {
+            doze();
+        }
+    }
+};