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-rw-r--r--arch/arc/kernel/entry-arcv2.S19
-rw-r--r--arch/arc/kernel/entry-compact.S29
-rw-r--r--arch/arc/kernel/entry.S17
3 files changed, 44 insertions, 21 deletions
diff --git a/arch/arc/kernel/entry-arcv2.S b/arch/arc/kernel/entry-arcv2.S
index 445e63a10754..cbfec79137bf 100644
--- a/arch/arc/kernel/entry-arcv2.S
+++ b/arch/arc/kernel/entry-arcv2.S
@@ -91,6 +91,25 @@ ENTRY(EV_DCError)
flag 1
END(EV_DCError)
+; ---------------------------------------------
+; Memory Error Exception Handler
+; - Unlike ARCompact, handles Bus errors for both User/Kernel mode,
+; Instruction fetch or Data access, under a single Exception Vector
+; ---------------------------------------------
+
+ENTRY(mem_service)
+
+ EXCEPTION_PROLOGUE
+
+ lr r0, [efa]
+ mov r1, sp
+
+ FAKE_RET_FROM_EXCPN
+
+ bl do_memory_error
+ b ret_from_exception
+END(mem_service)
+
ENTRY(EV_Misaligned)
EXCEPTION_PROLOGUE
diff --git a/arch/arc/kernel/entry-compact.S b/arch/arc/kernel/entry-compact.S
index 59f52035b4ea..431433929189 100644
--- a/arch/arc/kernel/entry-compact.S
+++ b/arch/arc/kernel/entry-compact.S
@@ -142,16 +142,12 @@ int1_saved_reg:
.zero 4
/* Each Interrupt level needs its own scratch */
-#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
-
ARCFP_DATA int2_saved_reg
.type int2_saved_reg, @object
.size int2_saved_reg, 4
int2_saved_reg:
.zero 4
-#endif
-
; ---------------------------------------------
.section .text, "ax",@progbits
@@ -216,6 +212,31 @@ END(handle_interrupt_level2)
#endif
; ---------------------------------------------
+; User Mode Memory Bus Error Interrupt Handler
+; (Kernel mode memory errors handled via seperate exception vectors)
+; ---------------------------------------------
+ENTRY(mem_service)
+
+ INTERRUPT_PROLOGUE 2
+
+ mov r0, ilink2
+ mov r1, sp
+
+ ; User process needs to be killed with SIGBUS, but first need to get
+ ; out of the L2 interrupt context (drop to pure kernel mode) and jump
+ ; off to "C" code where SIGBUS in enqueued
+ lr r3, [status32]
+ bclr r3, r3, STATUS_A2_BIT
+ or r3, r3, (STATUS_E1_MASK|STATUS_E2_MASK)
+ sr r3, [status32_l2]
+ mov ilink2, 1f
+ rtie
+1:
+ bl do_memory_error
+ b ret_from_exception
+END(mem_service)
+
+; ---------------------------------------------
; Level 1 ISR
; ---------------------------------------------
ENTRY(handle_interrupt_level1)
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 589abf5172d6..2efb0625331d 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -93,23 +93,6 @@ ENTRY(instr_service)
END(instr_service)
; ---------------------------------------------
-; Memory Error Exception Handler
-; ---------------------------------------------
-
-ENTRY(mem_service)
-
- EXCEPTION_PROLOGUE
-
- lr r0, [efa]
- mov r1, sp
-
- FAKE_RET_FROM_EXCPN
-
- bl do_memory_error
- b ret_from_exception
-END(mem_service)
-
-; ---------------------------------------------
; Machine Check Exception Handler
; ---------------------------------------------