exo: add stub warmboot.bin

exosphere/lp0fw/src/lp0.c

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+ 
+#include "utils.h"
+#include "lp0.h"
+#include "pmc.h"
+#include "timer.h"
+
+void reboot(void) {
+    /* Write MAIN_RST */
+    APBDEV_PMC_CNTRL_0 = 0x10;
+    while (true) {
+        /* Wait for reboot. */
+    }
+}
+
+void lp0_entry_main(warmboot_metadata_t *meta) {
+    /* Before doing anything else, ensure some sanity. */
+    if (meta->magic != WARMBOOT_MAGIC || meta->tz_relative_offset > 0x2000) {
+        reboot();
+    }
+    
+    /* TODO: stuff */
+
+    while (true) { /* TODO: Halt BPMP */ }
+}
+
+