exosphere: Add support for AMS SMC extensions

exosphere/src/smc_ams.c

@@ -0,0 +1,33 @@
+/*
+ * 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 <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "utils.h"
+#include "smc_api.h"
+#include "smc_ams.h"
+
+uint32_t ams_iram_copy(smc_args_t *args) {
+    /* TODO: Implement a DRAM <-> IRAM copy of up to one page here. */
+    /* This operation is necessary to implement reboot-to-payload. */
+    /* args->X[1] = DRAM address (translated by kernel). */
+    /* args->X[2] = IRAM address. */
+    /* args->X[3] = size (must be <= 0x1000). */
+    /* args->X[4] = 0 for read, 1 for write. */
+    return 2;
+}