[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/sparc/prom/mp.c b/src/kernel/linux/v4.14/arch/sparc/prom/mp.c
new file mode 100644
index 0000000..67cf0e9
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/sparc/prom/mp.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mp.c: OpenBoot Prom Multiprocessor support routines. Don't call
+ * these on a UP or else you will halt and catch fire. ;)
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+extern void restore_current(void);
+
+/* Start cpu with prom-tree node 'cpunode' using context described
+ * by 'ctable_reg' in context 'ctx' at program counter 'pc'.
+ *
+ * XXX Have to look into what the return values mean. XXX
+ */
+int
+prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc)
+{
+ int ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&prom_lock, flags);
+ switch(prom_vers) {
+ case PROM_V0:
+ case PROM_V2:
+ default:
+ ret = -1;
+ break;
+ case PROM_V3:
+ ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc);
+ break;
+ }
+ restore_current();
+ spin_unlock_irqrestore(&prom_lock, flags);
+
+ return ret;
+}