aarch64/foundation-armv8: Enable DYNAMIC_CBMEM

Some 64-bit pointer casts errors related to
DYNAMIC_CBMEM were fixed in a separate patch.

BUG=None
BRANCH=none
TEST=Ran image in foundation model

Change-Id: Ia4cce9bef152e9acd9c897de895b7c293f7d2188
Signed-off-by: Marcelo Povoa <marcelogp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/186742
Reviewed-by: David Hendricks <dhendrix@chromium.org>

src/arch/aarch64/Makefile.inc

@@ -153,6 +153,7 @@ romstage-y += cpu.S
 romstage-y += exception.c
 romstage-y += exception_asm.S
 romstage-$(CONFIG_EARLY_CONSOLE) += early_console.c
+romstage-y += cbmem.c
 
 bootblock-y += stages.c
 romstage-y += stages.c
@@ -170,6 +171,7 @@ ramstage-y += cpu.S
 
 ramstage-y += boot.c
 ramstage-y += tables.c
+ramstage-y += cbmem.c
 
 #romstage-y += memset.S
 #ramstage-y += memset.S

src/arch/aarch64/cbmem.c

@@ -0,0 +1,30 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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
+ */
+
+#include <cbmem.h>
+
+unsigned long get_top_of_ram(void);
+
+unsigned long get_top_of_ram(void)
+{
+        return CONFIG_RAMTOP;
+}
+
+void *cbmem_top(void)
+{
+        return (void *)get_top_of_ram();
+}

src/mainboard/emulation/foundation-armv8/Kconfig

@@ -25,6 +25,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select HAVE_UART_MEMORY_MAPPED
 	select HAVE_UART_SPECIAL
 	select BOARD_ROMSIZE_KB_4096
+	select DYNAMIC_CBMEM
 
 config MAINBOARD_DIR
 	string