Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / ia64 / sn / kernel / sn2 / ptc_deadlock.S

diff --git a/arch/ia64/sn/kernel/sn2/ptc_deadlock.S b/arch/ia64/sn/kernel/sn2/ptc_deadlock.S
index 7947312..bebbcc4 100644 (file)
--- a/arch/ia64/sn/kernel/sn2/ptc_deadlock.S
+++ b/arch/ia64/sn/kernel/sn2/ptc_deadlock.S
@@ -3,14 +3,15 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
+#include <asm/types.h>
 #include <asm/sn/shub_mmr.h>
 
 #define DEADLOCKBIT    SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_SHFT
 #define WRITECOUNTMASK SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK
-#define ALIAS_OFFSET   (SH1_PIO_WRITE_STATUS_0_ALIAS-SH1_PIO_WRITE_STATUS_0)
+#define ALIAS_OFFSET   8
 
 
        .global sn2_ptc_deadlock_recovery_core
@@ -35,13 +36,19 @@ sn2_ptc_deadlock_recovery_core:
        extr.u  piowcphy=piowc,0,61;;   // Convert piowc to uncached physical address
        dep     piowcphy=-1,piowcphy,63,1
        movl    mask=WRITECOUNTMASK
+       mov     r8=r0
 
 1:
+       cmp.ne  p8,p9=r0,ptc1           // Test for shub type (ptc1 non-null on shub1)
+                                       // p8 = 1 if shub1, p9 = 1 if shub2
+
        add     scr2=ALIAS_OFFSET,piowc // Address of WRITE_STATUS alias register 
        mov     scr1=7;;                // Clear DEADLOCK, WRITE_ERROR, MULTI_WRITE_ERROR
-       st8.rel [scr2]=scr1;;
+(p8)   st8.rel [scr2]=scr1;;
+(p9)   ld8.acq scr1=[scr2];;
 
 5:     ld8.acq scr1=[piowc];;          // Wait for PIOs to complete.
+       hint    @pause
        and     scr2=scr1,mask;;        // mask of writecount bits
        cmp.ne  p6,p0=zeroval,scr2
 (p6)   br.cond.sptk 5b
@@ -56,6 +63,7 @@ sn2_ptc_deadlock_recovery_core:
        st8.rel [ptc0]=data0            // Write PTC0 & wait for completion.
 
 5:     ld8.acq scr1=[piowcphy];;       // Wait for PIOs to complete.
+       hint    @pause
        and     scr2=scr1,mask;;        // mask of writecount bits
        cmp.ne  p6,p0=zeroval,scr2
 (p6)   br.cond.sptk 5b;;
@@ -66,6 +74,7 @@ sn2_ptc_deadlock_recovery_core:
 (p7)   st8.rel [ptc1]=data1;;          // Now write PTC1.
 
 5:     ld8.acq scr1=[piowcphy];;       // Wait for PIOs to complete.
+       hint    @pause
        and     scr2=scr1,mask;;        // mask of writecount bits
        cmp.ne  p6,p0=zeroval,scr2
 (p6)   br.cond.sptk 5b
@@ -76,6 +85,7 @@ sn2_ptc_deadlock_recovery_core:
        srlz.i;;
        ////////////// END   PHYSICAL MODE ////////////////////
 
+(p8)   add     r8=1,r8
 (p8)   br.cond.spnt 1b;;               // Repeat if DEADLOCK occurred.
 
        br.ret.sptk     rp