--- zzzz-none-000/linux-4.9.276/arch/mips/include/asm/processor.h	2021-07-20 14:21:16.000000000 +0000
+++ falcon-5530-750/linux-4.9.276/arch/mips/include/asm/processor.h	2023-04-05 08:19:00.000000000 +0000
@@ -22,6 +22,10 @@
 #include <asm/mipsregs.h>
 #include <asm/prefetch.h>
 
+#ifdef CONFIG_SOC_GRX500
+#define ARCH_LOW_ADDRESS_LIMIT MAX_DMA_ADDRESS
+#endif
+
 /*
  * Return current * instruction pointer ("program counter").
  */