diff --git a/repos/base-nova/include/nova/syscall-generic.h b/repos/base-nova/include/nova/syscall-generic.h
index 13240f663d..7739047b0f 100644
--- a/repos/base-nova/include/nova/syscall-generic.h
+++ b/repos/base-nova/include/nova/syscall-generic.h
@@ -66,9 +66,11 @@ namespace Nova {
 		NOVA_ASSIGN_GSI = 0xe,
 		NOVA_PD_CTRL    = 0xf,
 		NOVA_YIELD		= 0x10,
-		NOVA_CREATE_CELL= 0x11,
+		NOVA_MXINIT     = 0x11,
 		NOVA_ALLOC_CORES= 0x12,
 		NOVA_CORE_ALLOC = 0x13,
+		NOVA_CREATE_CELL= 0x14,
+		NOVA_CELL_CTRL  = 0x15,
 	};
 
 	/**
@@ -281,6 +283,15 @@ namespace Nova {
 		HPC_READ = 10U,
 	};
 
+	/**
+	 * Cell operations
+	*/
+	enum Cell_op
+	{
+		SHRINK = 0,
+		GROW = 1,
+	};
+
 	/**
 	 * Pd operations
 	 */
diff --git a/repos/base-nova/include/spec/64bit/nova/syscalls.h b/repos/base-nova/include/spec/64bit/nova/syscalls.h
index bd17a4d308..9626fbab3f 100644
--- a/repos/base-nova/include/spec/64bit/nova/syscalls.h
+++ b/repos/base-nova/include/spec/64bit/nova/syscalls.h
@@ -449,7 +449,7 @@ namespace Nova {
 	ALWAYS_INLINE
 	inline uint8_t mxinit(mword_t rip, mword_t id, mword_t channel)
 	{
-		return syscall_2(NOVA_CREATE_CELL, 0, id, rip, channel);
+		return syscall_2(NOVA_MXINIT, 0, id, rip, channel);
 	}
 
 	ALWAYS_INLINE
@@ -463,5 +463,23 @@ namespace Nova {
 	{
 		return syscall_5(NOVA_CORE_ALLOC, 0, 0, allocation, allocation);
 	}
+
+	ALWAYS_INLINE
+	inline uint8_t create_cell(mword_t pd, mword_t prio, mword_t start, mword_t end)
+	{
+		return syscall_2(NOVA_CREATE_CELL, static_cast<Nova::uint8_t>(prio), pd, start, end);
+	}
+
+	ALWAYS_INLINE
+	inline uint8_t grow_cell(mword_t pd, mword_t start, mword_t end)
+	{
+		return syscall_2(NOVA_CELL_CTRL, Cell_op::GROW, pd, start, end);
+	}
+
+	ALWAYS_INLINE
+	inline uint8_t shrink_cell(mword_t pd, mword_t start, mword_t end)
+	{
+		return syscall_2(NOVA_CELL_CTRL, Cell_op::SHRINK, pd, start, end);
+	}
 }
 #endif /* _INCLUDE__SPEC__64BIT__NOVA__SYSCALLS_H_ */