blackfin: scb: Add system crossbar init code.

If SCB exists in select blackfin cpu, developer can change the SCB
priority in kernel configuration.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Steven Miao <realmz6@gmail.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/scb.h b/arch/blackfin/include/asm/scb.h
new file mode 100644
index 000000000000..a294cc0d1a4a
--- /dev/null
+++ b/arch/blackfin/include/asm/scb.h
@@ -0,0 +1,21 @@
+/*
+ * arch/blackfin/mach-common/scb-init.c - reprogram system cross bar priority
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#define SCB_SLOT_OFFSET 24
+#define SCB_MI_MAX_SLOT 32
+
+struct scb_mi_prio {
+        unsigned long scb_mi_arbr;
+        unsigned long scb_mi_arbw;
+        unsigned char scb_mi_slots;
+        unsigned char scb_mi_prio[SCB_MI_MAX_SLOT];
+};
+
+extern struct scb_mi_prio scb_data[];
+
+extern void init_scb(void);