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>

1 files changed, 17 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 24dcc0ecf24..a42637c3a72 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -246,11 +246,9 @@ interrupt_base_book3e:					/* fake trap */
         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 @@ interrupt_end_book3e:
 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(0xd00)
 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: