[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/blackfin/mach-bf561/hotplug.c b/src/kernel/linux/v4.14/arch/blackfin/mach-bf561/hotplug.c
new file mode 100644
index 0000000..0123117
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/blackfin/mach-bf561/hotplug.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2007-2009 Analog Devices Inc.
+ * Graff Yang <graf.yang@analog.com>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/smp.h>
+#include <asm/blackfin.h>
+#include <asm/cacheflush.h>
+#include <mach/pll.h>
+
+int hotplug_coreb;
+
+void platform_cpu_die(void)
+{
+ unsigned long iwr;
+
+ hotplug_coreb = 1;
+
+ /*
+ * When CoreB wakes up, the code in _coreb_trampoline_start cannot
+ * turn off the data cache. This causes the CoreB failed to boot.
+ * As a workaround, we invalidate all the data cache before sleep.
+ */
+ blackfin_invalidate_entire_dcache();
+
+ /* disable core timer */
+ bfin_write_TCNTL(0);
+
+ /* clear ipi interrupt IRQ_SUPPLE_0 of CoreB */
+ bfin_write_SICB_SYSCR(bfin_read_SICB_SYSCR() | (1 << (10 + 1)));
+ SSYNC();
+
+ /* set CoreB wakeup by ipi0, iwr will be discarded */
+ bfin_iwr_set_sup0(&iwr, &iwr, &iwr);
+ SSYNC();
+
+ coreb_die();
+}