diff options
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/config.mk | 4 | ||||
| -rw-r--r-- | arch/arc/cpu/arc700/start.S | 18 |
2 files changed, 18 insertions, 4 deletions
diff --git a/arch/arc/config.mk b/arch/arc/config.mk index e408800..5321987 100644 --- a/arch/arc/config.mk +++ b/arch/arc/config.mk @@ -21,6 +21,10 @@ ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(ARC_CROSS_COMPILE) endif +ifdef CONFIG_ARC_MMU_VER +CONFIG_MMU = 1 +endif + PLATFORM_CPPFLAGS += -ffixed-r25 -D__ARC__ -gdwarf-2 # Needed for relocation diff --git a/arch/arc/cpu/arc700/start.S b/arch/arc/cpu/arc700/start.S index 4d505bf..2318282 100644 --- a/arch/arc/cpu/arc700/start.S +++ b/arch/arc/cpu/arc700/start.S @@ -78,6 +78,16 @@ PUSHAX %erbta .endm +.macro SAVE_EXCEPTION_SOURCE +#ifdef CONFIG_MMU + /* If MMU exists exception faulting address is loaded in EFA reg */ + lr %r0, [%efa] +#else + /* Otherwise in ERET (exception return) reg */ + lr %r0, [%eret] +#endif +.endm + .align 4 .globl _start _start: @@ -102,13 +112,13 @@ _start: memory_error: SAVE_ALL_SYS - lr %r0, [%efa] + SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_memory_error instruction_error: SAVE_ALL_SYS - lr %r0, [%efa] + SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_instruction_error @@ -119,7 +129,7 @@ interrupt_handler: EV_MachineCheck: SAVE_ALL_SYS - lr %r0, [%efa] + SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_machine_check_fault @@ -135,7 +145,7 @@ EV_TLBMissD: EV_TLBProtV: SAVE_ALL_SYS - lr %r0, [%efa] + SAVE_EXCEPTION_SOURCE mov %r1, %sp j do_tlb_prot_violation |