On SGI IP28 systems, fix an early crash at boot by setting IO_BASE to a
correct value so that ioremap works properly.
Exception: <vector=normal>
Status register: 0x34004882<CU1,CU0,FR,IM7,IM4,IPL=???,KX,MODE=KERNEL>
Cause register: 0x10<CE=0,EXC=RADE>
Exception PC: 0xa800000020654004, Exception RA: 0xa800000020654c9c
Read address error exception, bad address: 0xdfbdd600
Signed-off-by: Joshua Kinard <kumba@xxxxxxxxxx>
Reported-by: Joshua Kinard <kumba@xxxxxxxxxx>
Suggested-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Tested-by: Joshua Kinard <kumba@xxxxxxxxxx>
Fixes: ed3ce16c3d2b ("Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for
PHYS_OFFSET"")
---
arch/mips/include/asm/mach-ip28/spaces.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/include/asm/mach-ip28/spaces.h
b/arch/mips/include/asm/mach-ip28/spaces.h
index 5d6a764..8c60fb0 100644
--- a/arch/mips/include/asm/mach-ip28/spaces.h
+++ b/arch/mips/include/asm/mach-ip28/spaces.h
@@ -18,7 +18,7 @@
#define PHYS_OFFSET _AC(0x20000000, UL)
#define UNCAC_BASE _AC(0xc0000000, UL) /* 0xa0000000 + PHYS_OFFSET */
-#define IO_BASE UNCAC_BASE
+#define IO_BASE _AC(0x9000000000000000, UL)
#include <asm/mach-generic/spaces.h>
