From 8d3b8354c30480625862da5f24a4c10d9bd19673 Mon Sep 17 00:00:00 2001
From: Michael Scire <SciresM@gmail.com>
Date: Fri, 30 Nov 2018 04:57:17 -0800
Subject: [PATCH] Exosphere: Add extension to perform a reboot to rcm.

---
 exosphere/src/configitem.c | 21 ++++++++++++++++++---
 exosphere/src/configitem.h |  3 ++-
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/exosphere/src/configitem.c b/exosphere/src/configitem.c
index f03fee2bf..1f70343bb 100644
--- a/exosphere/src/configitem.c
+++ b/exosphere/src/configitem.c
@@ -31,11 +31,22 @@ static bool g_battery_profile = false;
 static bool g_debugmode_override_user = false, g_debugmode_override_priv = false;
 
 uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
-    if (item != CONFIGITEM_BATTERYPROFILE) {
-        return 2;
+    switch (item) {
+        case CONFIGITEM_BATTERYPROFILE:
+            g_battery_profile = (value != 0);
+            break;
+        case CONFIGITEM_NEEDS_REBOOT_TO_RCM:
+            /* Force a reboot to RCM. */
+            {
+                MAKE_REG32(0x7000E450) = 0x2;
+                MAKE_REG32(0x7000E400) = 0x10;
+                while (1) { }
+            }
+            break;
+        default:
+            return 2;
     }
     
-    g_battery_profile = (value != 0);
     return 0;
 }
 
@@ -167,6 +178,10 @@ uint32_t configitem_get(bool privileged, ConfigItem item, uint64_t *p_outvalue)
                           ((uint64_t)(exosphere_get_target_firmware() & 0xFF) << 8ull) |
                           ((uint64_t)(mkey_get_revision() & 0xFF) << 0ull);
             break;
+        case CONFIGITEM_NEEDS_REBOOT_TO_RCM:
+            /* UNOFFICIAL: The fact that we are executing means we aren't in the process of rebooting to rcm. */
+            *p_outvalue = 0;
+            break;
         default:
             result = 2;
             break;
diff --git a/exosphere/src/configitem.h b/exosphere/src/configitem.h
index f73c5469b..8aef4e975 100644
--- a/exosphere/src/configitem.h
+++ b/exosphere/src/configitem.h
@@ -40,7 +40,8 @@ typedef enum {
     CONFIGITEM_PACKAGE2HASH_5X = 17,
     
     /* These are unofficial, for usage by Exosphere. */
-    CONFIGITEM_EXOSPHERE_VERSION = 65000
+    CONFIGITEM_EXOSPHERE_VERSION = 65000,
+    CONFIGITEM_NEEDS_REBOOT_TO_RCM = 65001,
 } ConfigItem;
 
 uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value);