bootblock_cpu_init() stub for exynos5250

This adds a stub for bootblock_cpu_init() for exynos5250. It will
eventually contain code to copy ROM content from SPI to SRAM.

Change-Id: I26ee62a1e701013f38f76f200579faa680530860
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2138
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/samsung/exynos5250/Kconfig

@@ -1,3 +1,11 @@
+config BOOTBLOCK_CPU_INIT
+	string
+	default "cpu/samsung/exynos5250/bootblock.c"
+	help
+	  CPU/SoC-specific bootblock code. This is useful if the
+	  bootblock must load microcode or copy data from ROM before
+	  searching for the bootblock.
+
 config EXYNOS_ACE_SHA
 	bool
 	default n

src/cpu/samsung/exynos5250/bootblock.c

@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 The Chromium OS Authors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+void bootblock_cpu_init(void);
+void bootblock_cpu_init(void)
+{
+	/*
+	 * FIXME: this is a stub for now. It should eventually copy
+	 * romstage data (and maybe more) from SPI to SRAM.
+	 */
+#if 0
+	volatile unsigned long *addr = (unsigned long *)0x1004330c;
+	*addr |= 0x100;
+	while (1) ;
+#endif
+}