Blackfin: SMP: add PM/CPU hotplug support
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/mach-bf561/hotplug.c b/arch/blackfin/mach-bf561/hotplug.c
new file mode 100644
index 0000000..c95169b
--- /dev/null
+++ b/arch/blackfin/mach-bf561/hotplug.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2007-2009 Analog Devices Inc.
+ * Graff Yang <graf.yang@analog.com>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <asm/blackfin.h>
+#include <asm/smp.h>
+#define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1))
+
+int hotplug_coreb;
+
+void platform_cpu_die(void)
+{
+ unsigned long iwr[2] = {0, 0};
+ unsigned long bank = SIC_SYSIRQ(IRQ_SUPPLE_0) / 32;
+ unsigned long bit = 1 << (SIC_SYSIRQ(IRQ_SUPPLE_0) % 32);
+
+ hotplug_coreb = 1;
+
+ iwr[bank] = bit;
+
+ /* disable core timer */
+ bfin_write_TCNTL(0);
+
+ /* clear ipi interrupt IRQ_SUPPLE_0 */
+ bfin_write_SICB_SYSCR(bfin_read_SICB_SYSCR() | (1 << (10 + 1)));
+ SSYNC();
+
+ coreb_sleep(iwr[0], iwr[1], 0);
+}