1 files changed, 60 insertions, 0 deletions

diff --git a/arch/blackfin/mach-common/interrupt.S b/arch/blackfin/mach-common/interrupt.S
index 2604b532897c..c1bdd1edc8eb 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
@@ -247,3 +254,56 @@ 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 */