imgtec/danube: Add support for ImgTec Danube SoC

Add build infrastructure and basic support code for the ImgTec Danube
SoC. This support is sufficient to run on a simulator.

BUG=chrome-os-partner:31438
TEST=none yet

Change-Id: I59e36589765bf06b075fd4850215a0ef71246bb1
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 881278d7fbb8e6803bc8f6f9e84c64640b097401
Original-Change-Id: Ia7ed7288b13085db7ff37b5ad75d978b6137f958
Original-Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/207974
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8762
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/soc/imgtec/danube/cbmem.c b/src/soc/imgtec/danube/cbmem.c
new file mode 100644
index 0000000000..5fb6c0e7bd
--- /dev/null
+++ b/src/soc/imgtec/danube/cbmem.c
@@ -0,0 +1,29 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Imagination Technologies
+ *
+ * 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>
+#include <stdlib.h>
+
+void *cbmem_top(void)
+{
+	uintptr_t top = MIN(CONFIG_DRAM_SIZE_MB, 256) << 20;
+	return (void *)(top + CONFIG_SYS_SDRAM_BASE);
+}