[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/arm/mach-tango/platsmp.c b/src/kernel/linux/v4.14/arch/arm/mach-tango/platsmp.c
new file mode 100644
index 0000000..65012af
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/arm/mach-tango/platsmp.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include "smc.h"
+
+static int tango_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ tango_set_aux_boot_addr(__pa_symbol(secondary_startup));
+ tango_start_aux_core(cpu);
+ return 0;
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * cpu_kill() and cpu_die() run concurrently on different cores.
+ * Firmware will only "kill" a core once it has properly "died".
+ * Try a few times to kill a core before giving up, and sleep
+ * between tries to give that core enough time to die.
+ */
+static int tango_cpu_kill(unsigned int cpu)
+{
+ int i, err;
+
+ for (i = 0; i < 10; ++i) {
+ msleep(10);
+ err = tango_aux_core_kill(cpu);
+ if (!err)
+ return true;
+ }
+
+ return false;
+}
+
+static void tango_cpu_die(unsigned int cpu)
+{
+ while (tango_aux_core_die(cpu) < 0)
+ cpu_relax();
+
+ panic("cpu %d failed to die\n", cpu);
+}
+#endif
+
+static const struct smp_operations tango_smp_ops __initconst = {
+ .smp_boot_secondary = tango_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_kill = tango_cpu_kill,
+ .cpu_die = tango_cpu_die,
+#endif
+};
+
+CPU_METHOD_OF_DECLARE(tango4_smp, "sigma,tango4-smp", &tango_smp_ops);