1 files changed, 60 insertions, 20 deletions

diff --git a/arch/blackfin/mach-common/interrupt.S b/arch/blackfin/mach-common/interrupt.S
index 4a2ec7a9675a..473df0f7fa78 100644
--- a/arch/blackfin/mach-common/interrupt.S
+++ b/arch/blackfin/mach-common/interrupt.S
@@ -129,8 +129,15 @@ __common_int_entry:
 #endif
         r1 =  sp;
         SP += -12;
+#ifdef CONFIG_IPIPE
+        call ___ipipe_grab_irq
+        SP += 12;
+        cc = r0 == 0;
+        if cc jump .Lcommon_restore_context;
+#else /* CONFIG_IPIPE */
         call _do_irq;
         SP += 12;
+#endif /* CONFIG_IPIPE */
         call _return_from_int;
 .Lcommon_restore_context:
         RESTORE_CONTEXT
@@ -152,15 +159,6 @@ ENTRY(_evt_ivhw)
 1:
 #endif
 
-#ifdef CONFIG_HARDWARE_PM
-        r7 = [sp + PT_SEQSTAT];
-        r7 = r7 >>> 0xe;
-        r6 = 0x1F;
-        r7 = r7 & r6;
-        r5 = 0x12;
-        cc = r7 == r5;
-        if cc jump .Lcall_do_ovf; /* deal with performance counter overflow */
-#endif
         # We are going to dump something out, so make sure we print IPEND properly
         p2.l = lo(IPEND);
         p2.h = hi(IPEND);
@@ -192,17 +190,6 @@ ENTRY(_evt_ivhw)
 .Lcommon_restore_all_sys:
         RESTORE_ALL_SYS
         rti;
-
-#ifdef CONFIG_HARDWARE_PM
-.Lcall_do_ovf:
-
-        SP += -12;
-        call _pm_overflow;
-        SP += 12;
-
-        jump .Lcommon_restore_all_sys;
-#endif
-
 ENDPROC(_evt_ivhw)
 
 /* Interrupt routine for evt2 (NMI).
@@ -245,3 +232,56 @@ ENTRY(_evt_system_call)
         call _system_call;
         jump .Lcommon_restore_context;
 ENDPROC(_evt_system_call)
+
+#ifdef CONFIG_IPIPE
+ENTRY(___ipipe_call_irqtail)
+        r0.l = 1f;
+        r0.h = 1f;
+        reti = r0;
+        rti;
+1:
+        [--sp] = rets;
+        [--sp] = ( r7:4, p5:3 );
+        p0.l = ___ipipe_irq_tail_hook;
+        p0.h = ___ipipe_irq_tail_hook;
+        p0 = [p0];
+        sp += -12;
+        call (p0);
+        sp += 12;
+        ( r7:4, p5:3 ) = [sp++];
+        rets = [sp++];
+
+        [--sp] = reti;
+        reti = [sp++];          /* IRQs are off. */
+        r0.h = 3f;
+        r0.l = 3f;
+        p0.l = lo(EVT14);
+        p0.h = hi(EVT14);
+        [p0] = r0;
+        csync;
+        r0 = 0x401f;
+        sti r0;
+        raise 14;
+        [--sp] = reti;          /* IRQs on. */
+2:
+        jump 2b;                /* Likely paranoid. */
+3:
+        sp += 4;                /* Discard saved RETI */
+        r0.h = _evt14_softirq;
+        r0.l = _evt14_softirq;
+        p0.l = lo(EVT14);
+        p0.h = hi(EVT14);
+        [p0] = r0;
+        csync;
+        p0.l = _bfin_irq_flags;
+        p0.h = _bfin_irq_flags;
+        r0 = [p0];
+        sti r0;
+#if 0 /* FIXME: this actually raises scheduling latencies */
+        /* Reenable interrupts */
+        [--sp] = reti;
+        r0 = [sp++];
+#endif
+        rts;
+ENDPROC(___ipipe_call_irqtail)
+#endif /* CONFIG_IPIPE */