1 files changed, 89 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/iseries/smp.c b/arch/powerpc/platforms/iseries/smp.c
new file mode 100644
index 00000000000..8bda9be06fa
--- /dev/null
+++ b/arch/powerpc/platforms/iseries/smp.c
@@ -0,0 +1,89 @@
+/*
+ * SMP support for iSeries machines.
+ *
+ * Dave Engebretsen, Peter Bergner, and
+ * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
+ *
+ * Plus various changes from other IBM teams...
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/cache.h>
+#include <linux/err.h>
+#include <linux/sysdev.h>
+#include <linux/cpu.h>
+
+#include <asm/ptrace.h>
+#include <linux/atomic.h>
+#include <asm/irq.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/paca.h>
+#include <asm/iseries/hv_call.h>
+#include <asm/time.h>
+#include <asm/machdep.h>
+#include <asm/cputable.h>
+#include <asm/system.h>
+
+static void smp_iSeries_cause_ipi(int cpu, unsigned long data)
+{
+        HvCall_sendIPI(&(paca[cpu]));
+}
+
+static int smp_iSeries_probe(void)
+{
+        return cpumask_weight(cpu_possible_mask);
+}
+
+static int smp_iSeries_kick_cpu(int nr)
+{
+        BUG_ON((nr < 0) || (nr >= NR_CPUS));
+
+        /* Verify that our partition has a processor nr */
+        if (lppaca_of(nr).dyn_proc_status >= 2)
+                return -ENOENT;
+
+        /* The processor is currently spinning, waiting
+         * for the cpu_start field to become non-zero
+         * After we set cpu_start, the processor will
+         * continue on to secondary_start in iSeries_head.S
+         */
+        paca[nr].cpu_start = 1;
+
+        return 0;
+}
+
+static void __devinit smp_iSeries_setup_cpu(int nr)
+{
+}
+
+static struct smp_ops_t iSeries_smp_ops = {
+        .message_pass = NULL,   /* Use smp_muxed_ipi_message_pass */
+        .cause_ipi    = smp_iSeries_cause_ipi,
+        .probe        = smp_iSeries_probe,
+        .kick_cpu     = smp_iSeries_kick_cpu,
+        .setup_cpu    = smp_iSeries_setup_cpu,
+};
+
+/* This is called very early. */
+void __init smp_init_iSeries(void)
+{
+        smp_ops = &iSeries_smp_ops;
+}