diff --git a/proxyclient/m1n1/proxy.py b/proxyclient/m1n1/proxy.py
index 892caabb..265c7840 100644
--- a/proxyclient/m1n1/proxy.py
+++ b/proxyclient/m1n1/proxy.py
@@ -516,6 +516,7 @@ class M1N1Proxy(Reloadable):
     P_MMU_INIT = 0x30c
     P_MMU_DISABLE = 0x30d
     P_MMU_RESTORE = 0x30e
+    P_MMU_INIT_SECONDARY = 0x30f
 
     P_XZDEC = 0x400
     P_GZDEC = 0x401
@@ -864,6 +865,8 @@ class M1N1Proxy(Reloadable):
         return self.request(self.P_MMU_DISABLE)
     def mmu_restore(self, flags):
         self.request(self.P_MMU_RESTORE, flags)
+    def mmu_init_secondary(self, cpu):
+        self.request(self.P_MMU_INIT_SECONDARY, cpu)
 
 
     def xzdec(self, inbuf, insize, outbuf=0, outsize=0):
diff --git a/src/proxy.c b/src/proxy.c
index 2ab60a84..3cfa907c 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -289,6 +289,9 @@ int proxy_process(ProxyRequest *request, ProxyReply *reply)
         case P_MMU_RESTORE:
             mmu_restore(request->args[0]);
             break;
+        case P_MMU_INIT_SECONDARY:
+            mmu_init_secondary(request->args[0]);
+            break;
 
         case P_XZDEC: {
             uint32_t destlen, srclen;
diff --git a/src/proxy.h b/src/proxy.h
index 95a24d4b..899f275d 100644
--- a/src/proxy.h
+++ b/src/proxy.h
@@ -73,6 +73,7 @@ typedef enum {
     P_MMU_INIT,
     P_MMU_DISABLE,
     P_MMU_RESTORE,
+    P_MMU_INIT_SECONDARY,
 
     P_XZDEC = 0x400, // Decompression and data processing ops
     P_GZDEC,