Add UCB RISCV support for architecture, soc, and emulation mainboard..

Works in the RISCV version of QEMU.

Note that the lzmadecode is so unclean that it needs a lot of work.
A cleanup is in progress.

We decided in Prague to do this as one thing, because it forms a nice case study
of the bare minimum you need to add to get a new architecture going in qemu.

Change-Id: If5af15c3a70733d219973e0d032746f8ab027e4d
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/7584
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)

1 files changed, 45 insertions, 0 deletions

diff --git a/src/mainboard/emulation/qemu-riscv/bootblock.c b/src/mainboard/emulation/qemu-riscv/bootblock.c
new file mode 100644
index 0000000000..831b193a6e
--- /dev/null
+++ b/src/mainboard/emulation/qemu-riscv/bootblock.c
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2013 Google 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.
+ *
+ * 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 <arch/exception.h>
+#include <arch/hlt.h>
+#include <bootblock_common.h>
+#include <cbfs.h>
+#include <console/console.h>
+#include <arch/stages.h>
+
+// the qemu part of all this is very, very non-hardware like.
+// so it gets its own bootblock.
+void main(void)
+{
+	void *entry;
+
+	if (IS_ENABLED(CONFIG_BOOTBLOCK_CONSOLE)) {
+		console_init();
+		exception_init();
+	}
+
+	entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, CONFIG_CBFS_PREFIX"/romstage");
+	if (! entry) {
+		printk(BIOS_EMERG, "AAAAAAAAAAAAAA no romstage!\n");
+		while (1);
+	}
+
+	stage_exit(entry);
+}