powerpc/booke64: Remove ints from EXCEPTION_COMMON

The ints parameter was used to optionally insert RECONCILE_IRQ_STATE
into EXCEPTION_COMMON.  However, since it came at the end of
EXCEPTION_COMMON, there was no real benefit for it to be there as
opposed to being called separately by the caller of EXCEPTION_COMMON.

The ints parameter was causing some hassle when trying to add an extra
macro layer.  Besides avoiding that, moving "ints" to the caller makes
the code simpler by:
 - avoiding the asymmetry where INTS_RESTORE_HARD is called separately
by the individual exception, but INTS_DISABLE was not
 - removing the no-op INTS_KEEP
 - not having an unnecessary macro parameter

It also turned out to be necessary to delay the INTS_DISABLE
in the case of special level exceptions until after we saved the
old value of PACAIRQHAPPENED.

Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 46 insertions, 36 deletions

diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 89e1133b0185..0204c39f438e 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -151,7 +151,7 @@
 /* Core exception code for all exceptions except TLB misses.
  * XXX: Needs to make SPRN_SPRG_GEN depend on exception type
  */
-#define EXCEPTION_COMMON(n, excf, ints)                                     \
+#define EXCEPTION_COMMON(n, excf)                                           \
 exc_##n##_common:                                                           \
         std     r0,GPR0(r1);            /* save r0 in stackframe */         \
         std     r2,GPR2(r1);            /* save r2 in stackframe */         \
@@ -188,24 +188,20 @@ exc_##n##_common:							    \
         std     r11,SOFTE(r1);          /* and save it to stackframe */     \
         std     r12,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */       \
         std     r3,_TRAP(r1);           /* set trap number              */  \
-        std     r0,RESULT(r1);          /* clear regs->result */            \
-        ints;
+        std     r0,RESULT(r1);          /* clear regs->result */
 
-/* Variants for the "ints" argument. This one does nothing when we want
- * to keep interrupts in their original state
- */
-#define INTS_KEEP
-
-/* This second version is meant for exceptions that don't immediately
- * hard-enable. We set a bit in paca->irq_happened to ensure that
- * a subsequent call to arch_local_irq_restore() will properly
- * hard-enable and avoid the fast-path, and then reconcile irq state.
+/*
+ * This is meant for exceptions that don't immediately hard-enable.  We
+ * set a bit in paca->irq_happened to ensure that a subsequent call to
+ * arch_local_irq_restore() will properly hard-enable and avoid the
+ * fast-path, and then reconcile irq state.
  */
 #define INTS_DISABLE    RECONCILE_IRQ_STATE(r3,r4)
 
-/* This is called by exceptions that used INTS_KEEP (that did not touch
- * irq indicators in the PACA). This will restore MSR:EE to it's previous
- * value
+/*
+ * This is called by exceptions that don't use INTS_DISABLE (that did not
+ * touch irq indicators in the PACA).  This will restore MSR:EE to it's
+ * previous value
  *
  * XXX In the long run, we may want to open-code it in order to separate the
  *     load from the wrtee, thus limiting the latency caused by the dependency
@@ -263,7 +259,8 @@ exc_##n##_bad_stack:							    \
 #define MASKABLE_EXCEPTION(trapnum, intnum, label, hdlr, ack)           \
         START_EXCEPTION(label);                                         \
         NORMAL_EXCEPTION_PROLOG(trapnum, intnum, PROLOG_ADDITION_MASKABLE)\
-        EXCEPTION_COMMON(trapnum, PACA_EXGEN, INTS_DISABLE)             \
+        EXCEPTION_COMMON(trapnum, PACA_EXGEN)                           \
+        INTS_DISABLE;                                                   \
         ack(r8);                                                        \
         CHECK_NAPPING();                                                \
         addi    r3,r1,STACK_FRAME_OVERHEAD;                             \
@@ -318,7 +315,8 @@ interrupt_end_book3e:
         START_EXCEPTION(critical_input);
         CRIT_EXCEPTION_PROLOG(0x100, BOOKE_INTERRUPT_CRITICAL,
                               PROLOG_ADDITION_NONE)
-//      EXCEPTION_COMMON(0x100, PACA_EXCRIT, INTS_DISABLE)
+//      EXCEPTION_COMMON(0x100, PACA_EXCRIT)
+//      INTS_DISABLE
 //      bl      special_reg_save_crit
 //      CHECK_NAPPING();
 //      addi    r3,r1,STACK_FRAME_OVERHEAD
@@ -330,7 +328,8 @@ interrupt_end_book3e:
         START_EXCEPTION(machine_check);
         MC_EXCEPTION_PROLOG(0x000, BOOKE_INTERRUPT_MACHINE_CHECK,
                             PROLOG_ADDITION_NONE)
-//      EXCEPTION_COMMON(0x000, PACA_EXMC, INTS_DISABLE)
+//      EXCEPTION_COMMON(0x000, PACA_EXMC)
+//      INTS_DISABLE
 //      bl      special_reg_save_mc
 //      addi    r3,r1,STACK_FRAME_OVERHEAD
 //      CHECK_NAPPING();
@@ -344,7 +343,8 @@ interrupt_end_book3e:
                                 PROLOG_ADDITION_2REGS)
         mfspr   r14,SPRN_DEAR
         mfspr   r15,SPRN_ESR
-        EXCEPTION_COMMON(0x300, PACA_EXGEN, INTS_DISABLE)
+        EXCEPTION_COMMON(0x300, PACA_EXGEN)
+        INTS_DISABLE
         b       storage_fault_common
 
 /* Instruction Storage Interrupt */
@@ -353,7 +353,8 @@ interrupt_end_book3e:
                                 PROLOG_ADDITION_2REGS)
         li      r15,0
         mr      r14,r10
-        EXCEPTION_COMMON(0x400, PACA_EXGEN, INTS_DISABLE)
+        EXCEPTION_COMMON(0x400, PACA_EXGEN)
+        INTS_DISABLE
         b       storage_fault_common
 
 /* External Input Interrupt */
@@ -366,7 +367,7 @@ interrupt_end_book3e:
                                 PROLOG_ADDITION_2REGS)
         mfspr   r14,SPRN_DEAR
         mfspr   r15,SPRN_ESR
-        EXCEPTION_COMMON(0x600, PACA_EXGEN, INTS_KEEP)
+        EXCEPTION_COMMON(0x600, PACA_EXGEN)
         b       alignment_more  /* no room, go out of line */
 
 /* Program Interrupt */
@@ -374,7 +375,8 @@ interrupt_end_book3e:
         NORMAL_EXCEPTION_PROLOG(0x700, BOOKE_INTERRUPT_PROGRAM,
                                 PROLOG_ADDITION_1REG)
         mfspr   r14,SPRN_ESR
-        EXCEPTION_COMMON(0x700, PACA_EXGEN, INTS_DISABLE)
+        EXCEPTION_COMMON(0x700, PACA_EXGEN)
+        INTS_DISABLE
         std     r14,_DSISR(r1)
         addi    r3,r1,STACK_FRAME_OVERHEAD
         ld      r14,PACA_EXGEN+EX_R14(r13)
@@ -387,7 +389,7 @@ interrupt_end_book3e:
         NORMAL_EXCEPTION_PROLOG(0x800, BOOKE_INTERRUPT_FP_UNAVAIL,
                                 PROLOG_ADDITION_NONE)
         /* we can probably do a shorter exception entry for that one... */
-        EXCEPTION_COMMON(0x800, PACA_EXGEN, INTS_KEEP)
+        EXCEPTION_COMMON(0x800, PACA_EXGEN)
         ld      r12,_MSR(r1)
         andi.   r0,r12,MSR_PR;
         beq-    1f
@@ -404,7 +406,7 @@ interrupt_end_book3e:
         NORMAL_EXCEPTION_PROLOG(0x200, BOOKE_INTERRUPT_SPE_ALTIVEC_UNAVAIL,
                                 PROLOG_ADDITION_NONE)
         /* we can probably do a shorter exception entry for that one... */
-        EXCEPTION_COMMON(0x200, PACA_EXGEN, INTS_KEEP)
+        EXCEPTION_COMMON(0x200, PACA_EXGEN)
 #ifdef CONFIG_ALTIVEC
 BEGIN_FTR_SECTION
         ld      r12,_MSR(r1)
@@ -426,7 +428,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
         NORMAL_EXCEPTION_PROLOG(0x220,
                                 BOOKE_INTERRUPT_SPE_FP_DATA_ALTIVEC_ASSIST,
                                 PROLOG_ADDITION_NONE)
-        EXCEPTION_COMMON(0x220, PACA_EXGEN, INTS_DISABLE)
+        EXCEPTION_COMMON(0x220, PACA_EXGEN)
+        INTS_DISABLE
         bl      .save_nvgprs
         addi    r3,r1,STACK_FRAME_OVERHEAD
 #ifdef CONFIG_ALTIVEC
@@ -451,7 +454,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
         START_EXCEPTION(watchdog);
         CRIT_EXCEPTION_PROLOG(0x9f0, BOOKE_INTERRUPT_WATCHDOG,
                               PROLOG_ADDITION_NONE)
-//      EXCEPTION_COMMON(0x9f0, PACA_EXCRIT, INTS_DISABLE)
+//      EXCEPTION_COMMON(0x9f0, PACA_EXCRIT)
+//      INTS_DISABLE
 //      bl      special_reg_save_crit
 //      CHECK_NAPPING();
 //      addi    r3,r1,STACK_FRAME_OVERHEAD
@@ -471,7 +475,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
         START_EXCEPTION(ap_unavailable);
         NORMAL_EXCEPTION_PROLOG(0xf20, BOOKE_INTERRUPT_AP_UNAVAIL,
                                 PROLOG_ADDITION_NONE)
-        EXCEPTION_COMMON(0xf20, PACA_EXGEN, INTS_DISABLE)
+        EXCEPTION_COMMON(0xf20, PACA_EXGEN)
+        INTS_DISABLE
         bl      .save_nvgprs
         addi    r3,r1,STACK_FRAME_OVERHEAD
         bl      .unknown_exception
@@ -530,7 +535,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
         mfspr   r15,SPRN_SPRG_CRIT_SCRATCH
         mtspr   SPRN_SPRG_GEN_SCRATCH,r15
         mfspr   r14,SPRN_DBSR
-        EXCEPTION_COMMON(0xd00, PACA_EXCRIT, INTS_DISABLE)
+        EXCEPTION_COMMON(0xd00, PACA_EXCRIT)
+        INTS_DISABLE
         std     r14,_DSISR(r1)
         addi    r3,r1,STACK_FRAME_OVERHEAD
         mr      r4,r14
@@ -596,7 +602,8 @@ kernel_dbg_exc:
         mfspr   r15,SPRN_SPRG_DBG_SCRATCH
         mtspr   SPRN_SPRG_GEN_SCRATCH,r15
         mfspr   r14,SPRN_DBSR
-        EXCEPTION_COMMON(0xd08, PACA_EXDBG, INTS_DISABLE)
+        EXCEPTION_COMMON(0xd08, PACA_EXDBG)
+        INTS_DISABLE
         std     r14,_DSISR(r1)
         addi    r3,r1,STACK_FRAME_OVERHEAD
         mr      r4,r14
@@ -609,7 +616,8 @@ kernel_dbg_exc:
         START_EXCEPTION(perfmon);
         NORMAL_EXCEPTION_PROLOG(0x260, BOOKE_INTERRUPT_PERFORMANCE_MONITOR,
                                 PROLOG_ADDITION_NONE)
-        EXCEPTION_COMMON(0x260, PACA_EXGEN, INTS_DISABLE)
+        EXCEPTION_COMMON(0x260, PACA_EXGEN)
+        INTS_DISABLE
         CHECK_NAPPING()
         addi    r3,r1,STACK_FRAME_OVERHEAD
         bl      .performance_monitor_exception
@@ -623,7 +631,8 @@ kernel_dbg_exc:
         START_EXCEPTION(doorbell_crit);
         CRIT_EXCEPTION_PROLOG(0x2a0, BOOKE_INTERRUPT_DOORBELL_CRITICAL,
                               PROLOG_ADDITION_NONE)
-//      EXCEPTION_COMMON(0x2a0, PACA_EXCRIT, INTS_DISABLE)
+//      EXCEPTION_COMMON(0x2a0, PACA_EXCRIT)
+//      INTS_DISABLE
 //      bl      special_reg_save_crit
 //      CHECK_NAPPING();
 //      addi    r3,r1,STACK_FRAME_OVERHEAD
@@ -638,7 +647,7 @@ kernel_dbg_exc:
         START_EXCEPTION(guest_doorbell);
         GDBELL_EXCEPTION_PROLOG(0x2c0, BOOKE_INTERRUPT_GUEST_DBELL,
                                 PROLOG_ADDITION_NONE)
-        EXCEPTION_COMMON(0x2c0, PACA_EXGEN, INTS_KEEP)
+        EXCEPTION_COMMON(0x2c0, PACA_EXGEN)
         addi    r3,r1,STACK_FRAME_OVERHEAD
         bl      .save_nvgprs
         INTS_RESTORE_HARD
@@ -649,7 +658,8 @@ kernel_dbg_exc:
         START_EXCEPTION(guest_doorbell_crit);
         CRIT_EXCEPTION_PROLOG(0x2e0, BOOKE_INTERRUPT_GUEST_DBELL_CRIT,
                               PROLOG_ADDITION_NONE)
-//      EXCEPTION_COMMON(0x2e0, PACA_EXCRIT, INTS_DISABLE)
+//      EXCEPTION_COMMON(0x2e0, PACA_EXCRIT)
+//      INTS_DISABLE
 //      bl      special_reg_save_crit
 //      CHECK_NAPPING();
 //      addi    r3,r1,STACK_FRAME_OVERHEAD
@@ -661,7 +671,7 @@ kernel_dbg_exc:
         START_EXCEPTION(hypercall);
         NORMAL_EXCEPTION_PROLOG(0x310, BOOKE_INTERRUPT_HV_SYSCALL,
                                 PROLOG_ADDITION_NONE)
-        EXCEPTION_COMMON(0x310, PACA_EXGEN, INTS_KEEP)
+        EXCEPTION_COMMON(0x310, PACA_EXGEN)
         addi    r3,r1,STACK_FRAME_OVERHEAD
         bl      .save_nvgprs
         INTS_RESTORE_HARD
@@ -672,7 +682,7 @@ kernel_dbg_exc:
         START_EXCEPTION(ehpriv);
         NORMAL_EXCEPTION_PROLOG(0x320, BOOKE_INTERRUPT_HV_PRIV,
                                 PROLOG_ADDITION_NONE)
-        EXCEPTION_COMMON(0x320, PACA_EXGEN, INTS_KEEP)
+        EXCEPTION_COMMON(0x320, PACA_EXGEN)
         addi    r3,r1,STACK_FRAME_OVERHEAD
         bl      .save_nvgprs
         INTS_RESTORE_HARD
@@ -683,7 +693,7 @@ kernel_dbg_exc:
         START_EXCEPTION(lrat_error);
         NORMAL_EXCEPTION_PROLOG(0x340, BOOKE_INTERRUPT_LRAT_ERROR,
                                 PROLOG_ADDITION_NONE)
-        EXCEPTION_COMMON(0x340, PACA_EXGEN, INTS_KEEP)
+        EXCEPTION_COMMON(0x340, PACA_EXGEN)
         addi    r3,r1,STACK_FRAME_OVERHEAD
         bl      .save_nvgprs
         INTS_RESTORE_HARD