libpayload: arch/mips: Add basic MIPS architecture support

Add the basic build infrastructure and architectural support
required to build for targets using the MIPS architecture.
This will require the addition of cache maintenance.

BUG=chrome-os-partner:31438
TEST=tested on Pistachio FPGA with Depthcharge as payload;
     successfully executed payload.
BRANCH=none

Change-Id: I75cfd0536860b6d84b53a567940fe6668d9b2cbb
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 758c8cb9a6846e6ca32be409ec5f7a888ac9c888
Original-Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Original-Change-Id: I0b9af983bf5032335a519ce2510a0b3aca082edf
Original-Reviewed-on: https://chromium-review.googlesource.com/219740
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8741
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/payloads/libpayload/arch/mips/main.c b/payloads/libpayload/arch/mips/main.c
new file mode 100644
index 0000000000..d6f980a1f5
--- /dev/null
+++ b/payloads/libpayload/arch/mips/main.c
@@ -0,0 +1,62 @@
+/*
+ * This file is part of the libpayload 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 <exception.h>
+#include <libpayload.h>
+
+/* The argc value to pass to main() */
+unsigned int main_argc;
+/* The argv value to pass to main() */
+char *main_argv[MAX_ARGC_COUNT];
+
+/*
+ * This is our C entry function - set up the system
+ * and jump into the payload entry point.
+ */
+void start_main(void);
+void start_main(void)
+{
+	extern int main(int argc, char **argv);
+
+	/* Gather system information. */
+	lib_get_sysinfo();
+
+	/* Optionally set up the consoles. */
+#ifndef CONFIG_LP_SKIP_CONSOLE_INIT
+	console_init();
+#endif
+
+	exception_init();
+	/*
+	 * Any other system init that has to happen before the
+	 * user gets control goes here
+	 */
+
+	/*
+	 * Go to the entry point.
+	 * In the future we may care about the return value.
+	 */
+
+	(void) main(main_argc, (main_argc != 0) ? main_argv : NULL);
+
+	/*
+	 * Returning here will go to the _leave function to return
+	 * us to the original context.
+	 */
+}