powerpc/pmac/smp: Consolidate 32-bit and 64-bit PowerMac cpu_die in one file

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 55 insertions, 3 deletions

diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index eda470913291..50e15b43ffad 100644
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -865,7 +865,7 @@ static void __devinit smp_core99_setup_cpu(int cpu_nr)
 }
 
 
-#if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC32)
+#ifdef CONFIG_HOTPLUG_CPU
 
 static int smp_core99_cpu_disable(void)
 {
@@ -878,7 +878,9 @@ static int smp_core99_cpu_disable(void)
         return 0;
 }
 
-void pmac32_cpu_die(void)
+#ifdef CONFIG_PPC32
+
+static void pmac_cpu_die(void)
 {
         local_irq_disable();
         idle_task_exit();
@@ -889,7 +891,52 @@ void pmac32_cpu_die(void)
         low_cpu_die();
 }
 
-#endif /* CONFIG_HOTPLUG_CPU && CONFIG_PP32 */
+#else /* CONFIG_PPC32 */
+
+static void pmac_cpu_die(void)
+{
+        local_irq_disable();
+        idle_task_exit();
+
+        /*
+         * turn off as much as possible, we'll be
+         * kicked out as this will only be invoked
+         * on core99 platforms for now ...
+         */
+
+        printk(KERN_INFO "CPU#%d offline\n", smp_processor_id());
+        __get_cpu_var(cpu_state) = CPU_DEAD;
+        smp_wmb();
+
+        /*
+         * during the path that leads here preemption is disabled,
+         * reenable it now so that when coming up preempt count is
+         * zero correctly
+         */
+        preempt_enable();
+
+        /*
+         * hard-disable interrupts for the non-NAP case, the NAP code
+         * needs to re-enable interrupts (but soft-disables them)
+         */
+        hard_irq_disable();
+
+        while (1) {
+                /* let's not take timer interrupts too often ... */
+                set_dec(0x7fffffff);
+
+                /* should always be true at this point */
+                if (cpu_has_feature(CPU_FTR_CAN_NAP))
+                        power4_cpu_offline_powersave();
+                else {
+                        HMT_low();
+                        HMT_very_low();
+                }
+        }
+}
+
+#endif /* else CONFIG_PPC32 */
+#endif /* CONFIG_HOTPLUG_CPU */
 
 /* Core99 Macs (dual G4s and G5s) */
 struct smp_ops_t core99_smp_ops = {
@@ -933,5 +980,10 @@ void __init pmac_setup_smp(void)
                 smp_ops = &psurge_smp_ops;
         }
 #endif /* CONFIG_PPC32 */
+
+#ifdef CONFIG_HOTPLUG_CPU
+        ppc_md.cpu_die = pmac_cpu_die;
+#endif
 }
 
+