csky: Cache and TLB routines

This patch adds cache and tlb sync codes for abiv1 & abiv2.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

arch/csky/include/uapi/asm/cachectl.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_CSKY_CACHECTL_H
+#define __ASM_CSKY_CACHECTL_H
+
+/*
+ * See "man cacheflush"
+ */
+#define ICACHE  (1<<0)
+#define DCACHE  (1<<1)
+#define BCACHE  (ICACHE|DCACHE)
+
+#endif /* __ASM_CSKY_CACHECTL_H */