powerpc/book3e: Hookup doorbells exceptions on 64-bit Book3E
Note that critical doorbells are an unimplemented stub just like
other critical or machine check handlers, since we haven't done
support for "levelled" exceptions yet.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 24dcc0e..a42637c 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -246,11 +246,9 @@
EXCEPTION_STUB(0x1a0, watchdog) /* 0x09f0 */
EXCEPTION_STUB(0x1c0, data_tlb_miss)
EXCEPTION_STUB(0x1e0, instruction_tlb_miss)
+ EXCEPTION_STUB(0x280, doorbell)
+ EXCEPTION_STUB(0x2a0, doorbell_crit)
-#if 0
- EXCEPTION_STUB(0x280, processor_doorbell)
- EXCEPTION_STUB(0x220, processor_doorbell_crit)
-#endif
.globl interrupt_end_book3e
interrupt_end_book3e:
@@ -428,6 +426,19 @@
kernel_dbg_exc:
b . /* NYI */
+/* Doorbell interrupt */
+ MASKABLE_EXCEPTION(0x2070, doorbell, .doorbell_exception, ACK_NONE)
+
+/* Doorbell critical Interrupt */
+ START_EXCEPTION(doorbell_crit);
+ CRIT_EXCEPTION_PROLOG(0x2080, PROLOG_ADDITION_NONE)
+// EXCEPTION_COMMON(0x2080, PACA_EXCRIT, INTS_DISABLE_ALL)
+// bl special_reg_save_crit
+// addi r3,r1,STACK_FRAME_OVERHEAD
+// bl .doorbell_critical_exception
+// b ret_from_crit_except
+ b .
+
/*
* An interrupt came in while soft-disabled; clear EE in SRR1,
@@ -563,6 +574,8 @@
BAD_STACK_TRAMPOLINE(0xe00)
BAD_STACK_TRAMPOLINE(0xf00)
BAD_STACK_TRAMPOLINE(0xf20)
+BAD_STACK_TRAMPOLINE(0x2070)
+BAD_STACK_TRAMPOLINE(0x2080)
.globl bad_stack_book3e
bad_stack_book3e: