[Xen-changelog] More hyperprivop stuff

[BitKeeper Bot <riel@xxxxxxxxxxx>]

ChangeSet 1.1713.2.7, 2005/06/17 12:28:39-06:00, djm@xxxxxxxxxxxxxxx

        More hyperprivop stuff
        Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxx>



 hyperprivop.S |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+)


diff -Nru a/xen/arch/ia64/hyperprivop.S b/xen/arch/ia64/hyperprivop.S
--- a/xen/arch/ia64/hyperprivop.S       2005-06-23 07:03:24 -04:00
+++ b/xen/arch/ia64/hyperprivop.S       2005-06-23 07:03:24 -04:00
@@ -66,6 +66,10 @@
        cmp.eq p7,p6=XEN_HYPER_RFI,r17
 (p7)   br.sptk.many hyper_rfi;;
 
+       // HYPERPRIVOP_GET_IVR?
+       cmp.eq p7,p6=XEN_HYPER_GET_IVR,r17
+(p7)   br.sptk.many hyper_get_ivr;;
+
        cmp.ne p7,p0=r20,r0
 (p7)   br.spnt.many dispatch_break_fault ;;
 
@@ -589,3 +593,35 @@
        rfi
        ;;
 END(hyper_set_tpr)
+
+ENTRY(hyper_get_ivr)
+       // when we get to here r20=~=interrupts pending
+       cmp.ne p7,p0=r20,r0
+(p7)   br.spnt.many dispatch_break_fault ;;
+#ifdef FAST_HYPERPRIVOP_CNT
+       movl r20=fast_hyperpriv_cnt+(8*XEN_HYPER_GET_IVR);;
+       ld8 r21=[r20];;
+       adds r21=1,r21;;
+       st8 [r20]=r21;;
+#endif
+// if we get to here, there are no interrupts pending so we
+// force pending to zero and return SPURIOUS_VECTOR
+       adds r20=XSI_PEND_OFS-XSI_PSR_IC_OFS,r18 ;;
+       st4 [r20]=r0;;
+       mov r8=15;;
+       mov r24=cr.ipsr
+       mov r25=cr.iip;;
+       extr.u r26=r24,41,2 ;;
+       cmp.eq p6,p7=2,r26 ;;
+(p6)   mov r26=0
+(p6)   adds r25=16,r25
+(p7)   adds r26=1,r26
+       ;;
+       dep r24=r26,r24,41,2
+       ;;
+       mov cr.ipsr=r24
+       mov cr.iip=r25
+       mov pr=r31,-1 ;;
+       rfi
+       ;;
+END(hyper_get_ivr)

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