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-rw-r--r--arch/csky/mm/syscache.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/csky/mm/syscache.c b/arch/csky/mm/syscache.c
new file mode 100644
index 000000000..cd847ad62
--- /dev/null
+++ b/arch/csky/mm/syscache.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#include <linux/syscalls.h>
+#include <asm/page.h>
+#include <asm/cacheflush.h>
+#include <asm/cachectl.h>
+
+SYSCALL_DEFINE3(cacheflush,
+ void __user *, addr,
+ unsigned long, bytes,
+ int, cache)
+{
+ switch (cache) {
+ case BCACHE:
+ case DCACHE:
+ dcache_wb_range((unsigned long)addr,
+ (unsigned long)addr + bytes);
+ if (cache != BCACHE)
+ break;
+ fallthrough;
+ case ICACHE:
+ flush_icache_mm_range(current->mm,
+ (unsigned long)addr,
+ (unsigned long)addr + bytes);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}