--- a/arch/sparc/kernel/head_32.S
+++ b/arch/sparc/kernel/head_32.S
@@ -716,7 +716,7 @@ sun4_normal_loop:
 sun4c_remap:
                mov     0, %g3                  ! source base
                set     KERNBASE, %g4           ! destination base
-               set     0x300000, %g5           ! upper bound 3MB
+               set     0x800000, %g5           ! upper bound 8MB
                mov     1, %l6
                sll     %l6, 18, %l6            ! sun4c mmu segmap size