arc: clean-up init procedure

Intention behind this work was elimination of as much assembly-written
code as it is possible.

In case of ARC we already have relocation fix-up implemented in C so why
don't we use C for U-Boot copying, .bss zeroing etc.

It turned out x86 uses pretty similar approach so we re-used parts of
code in "board_f.c" initially implemented for x86.

Now assembly usage during init is limited to stack- and frame-pointer
setup before and after relocation.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Simon Glass <sjg@chromium.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/arch/arc/lib/init_helpers.c b/arch/arc/lib/init_helpers.c
new file mode 100644
index 0000000..25690ee
--- /dev/null
+++ b/arch/arc/lib/init_helpers.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int init_cache_f_r(void)
+{
+#ifndef CONFIG_SYS_ICACHE_OFF
+	icache_enable();
+	/* Make sure no stale entries persist from before we disabled cache */
+	invalidate_icache_all();
+#endif
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+	dcache_enable();
+	/* Make sure no stale entries persist from before we disabled cache */
+	invalidate_dcache_all();
+#endif
+	return 0;
+}