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, 19 insertions, 0 deletions

diff --git a/arch/arc/lib/relocate.c b/arch/arc/lib/relocate.c
index 7797782563..5c2c2d1930 100644
--- a/arch/arc/lib/relocate.c
+++ b/arch/arc/lib/relocate.c
@@ -10,6 +10,25 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+int copy_uboot_to_ram(void)
+{
+	size_t len = (size_t)&__image_copy_end - (size_t)&__image_copy_start;
+
+	memcpy((void *)gd->relocaddr, (void *)&__image_copy_start, len);
+
+	return 0;
+}
+
+int clear_bss(void)
+{
+	ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
+	size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
+
+	memset((void *)dst_addr, 0x00, len);
+
+	return 0;
+}
+
 /*
  * Base functionality is taken from x86 version with added ARC-specifics
  */