--- zzzz-none-000/linux-4.1.38/arch/mips/include/asm/pgtable-32.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/arch/mips/include/asm/pgtable-32.h	2020-11-25 10:06:48.000000000 +0000
@@ -61,7 +61,11 @@
 
 #define VMALLOC_START	  MAP_BASE
 
+#if defined(CONFIG_BCM_KF_512MB_DDR) && defined(CONFIG_BCM_512MB_DDR)
+#define PKMAP_BASE		(0xfc000000UL)
+#else
 #define PKMAP_BASE		(0xfe000000UL)
+#endif
 
 #ifdef CONFIG_HIGHMEM
 # define VMALLOC_END	(PKMAP_BASE-2*PAGE_SIZE)