mainboard/opencellular/elgon: Add mainboard support

Tested on Elgon EVT board and boots into GNU/Linux.

TODO:
* Add hard reset function for VBOOT.
* Add EC code
* Add SPI flash write protection

Change-Id: I9b809306cc48facbade5dc63846c4532b397e0b5
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/28024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/src/mainboard/opencellular/elgon/romstage.c b/src/mainboard/opencellular/elgon/romstage.c
new file mode 100644
index 0000000000..1b64765029
--- /dev/null
+++ b/src/mainboard/opencellular/elgon/romstage.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017-present Facebook, Inc.
+ *
+ * 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.
+ *
+ */
+
+#include <arch/exception.h>
+#include <cbmem.h>
+#include <romstage_handoff.h>
+#include <soc/sdram.h>
+#include <soc/timer.h>
+#include <soc/mmu.h>
+#include <stdlib.h>
+#include <console/console.h>
+#include <program_loading.h>
+#include <libbdk-hal/bdk-config.h>
+#include <string.h>
+#include <arch/stages.h>
+
+extern const struct bdk_devicetree_key_value devtree[];
+
+void platform_romstage_main(void)
+{
+	watchdog_poke(0);
+
+	console_init();
+	exception_init();
+
+	bdk_config_set_fdt(devtree);
+
+	sdram_init();
+	soc_mmu_init();
+
+	watchdog_poke(0);
+
+	cbmem_initialize_empty();
+	run_ramstage();
+}