1 files changed, 129 insertions, 0 deletions
diff --git a/arch/nios2/lib/cache.c b/arch/nios2/lib/cache.c
new file mode 100644
index 0000000000..7c74e1adfe
--- /dev/null
+++ b/arch/nios2/lib/cache.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
+ * Copyright (C) 2009, Wind River Systems Inc
+ * Implemented by fredrik.markstrom@gmail.com and ivarholmqvist@gmail.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/cache.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void __flush_dcache(unsigned long start, unsigned long end)
+{
+	unsigned long addr;
+
+	start &= ~(gd->arch.dcache_line_size - 1);
+	end += (gd->arch.dcache_line_size - 1);
+	end &= ~(gd->arch.dcache_line_size - 1);
+
+	for (addr = start; addr < end; addr += gd->arch.dcache_line_size) {
+		__asm__ __volatile__ ("   flushda 0(%0)\n"
+					: /* Outputs */
+					: /* Inputs  */ "r"(addr)
+					/* : No clobber */);
+	}
+}
+
+static void __flush_dcache_all(unsigned long start, unsigned long end)
+{
+	unsigned long addr;
+
+	start &= ~(gd->arch.dcache_line_size - 1);
+	end += (gd->arch.dcache_line_size - 1);
+	end &= ~(gd->arch.dcache_line_size - 1);
+
+	if (end > start + gd->arch.dcache_size)
+		end = start + gd->arch.dcache_size;
+
+	for (addr = start; addr < end; addr += gd->arch.dcache_line_size) {
+		__asm__ __volatile__ ("   flushd 0(%0)\n"
+					: /* Outputs */
+					: /* Inputs  */ "r"(addr)
+					/* : No clobber */);
+	}
+}
+
+static void __invalidate_dcache(unsigned long start, unsigned long end)
+{
+	unsigned long addr;
+
+	start &= ~(gd->arch.dcache_line_size - 1);
+	end += (gd->arch.dcache_line_size - 1);
+	end &= ~(gd->arch.dcache_line_size - 1);
+
+	for (addr = start; addr < end; addr += gd->arch.dcache_line_size) {
+		__asm__ __volatile__ ("   initda 0(%0)\n"
+					: /* Outputs */
+					: /* Inputs  */ "r"(addr)
+					/* : No clobber */);
+	}
+}
+
+static void __flush_icache(unsigned long start, unsigned long end)
+{
+	unsigned long addr;
+
+	start &= ~(gd->arch.icache_line_size - 1);
+	end += (gd->arch.icache_line_size - 1);
+	end &= ~(gd->arch.icache_line_size - 1);
+
+	if (end > start + gd->arch.icache_size)
+		end = start + gd->arch.icache_size;
+
+	for (addr = start; addr < end; addr += gd->arch.icache_line_size) {
+		__asm__ __volatile__ ("   flushi %0\n"
+					: /* Outputs */
+					: /* Inputs  */ "r"(addr)
+					/* : No clobber */);
+	}
+	__asm__ __volatile(" flushp\n");
+}
+
+void flush_dcache_all(void)
+{
+	__flush_dcache_all(0, gd->arch.dcache_size);
+	__flush_icache(0, gd->arch.icache_size);
+}
+
+void flush_dcache_range(unsigned long start, unsigned long end)
+{
+	if (gd->arch.has_initda)
+		__flush_dcache(start, end);
+	else
+		__flush_dcache_all(start, end);
+}
+
+void flush_cache(unsigned long start, unsigned long size)
+{
+	if (gd->arch.has_initda)
+		__flush_dcache(start, start + size);
+	else
+		__flush_dcache_all(start, start + size);
+	__flush_icache(start, start + size);
+}
+
+void invalidate_dcache_range(unsigned long start, unsigned long end)
+{
+	if (gd->arch.has_initda)
+		__invalidate_dcache(start, end);
+	else
+		__flush_dcache_all(start, end);
+}
+
+int dcache_status(void)
+{
+	return 1;
+}
+
+void dcache_enable(void)
+{
+	flush_dcache_all();
+}
+
+void dcache_disable(void)
+{
+	flush_dcache_all();
+}