Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
arch/ia64/xen/xenivt.S | 59 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 59 insertions(+), 0 deletions(-)
create mode 100644 arch/ia64/xen/xenivt.S
diff --git a/arch/ia64/xen/xenivt.S b/arch/ia64/xen/xenivt.S
new file mode 100644
index 0000000..99bb37a
--- /dev/null
+++ b/arch/ia64/xen/xenivt.S
@@ -0,0 +1,59 @@
+/*
+ * arch/ia64/xen/ivt.S
+ *
+ * Copyright (C) 2005 Hewlett-Packard Co
+ * Dan Magenheimer <dan.magenheimer@xxxxxx>
+ *
+ * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
+ * VA Linux Systems Japan K.K.
+ * pv_ops.
+ */
+
+#include <asm/asmmacro.h>
+#include <asm/kregs.h>
+#include <asm/pgtable.h>
+
+#define __IA64_ASM_PARAVIRTUALIZED_XEN
+#include "inst_xen.h"
+#include "xenminstate.h"
+#include "../kernel/minstate.h"
+
+ .section .text,"ax"
+GLOBAL_ENTRY(xen_event_callback)
+ mov r31=pr // prepare to save predicates
+ ;;
+ SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3
+ ;;
+ movl r3=XSI_PSR_IC
+ mov r14=1
+ ;;
+ st4 [r3]=r14
+ ;;
+ adds r3=8,r2 // set up second base pointer for SAVE_REST
+ srlz.i // ensure everybody knows psr.ic is back on
+ ;;
+ SAVE_REST
+ ;;
+1:
+ alloc r14=ar.pfs,0,0,1,0 // must be first in an insn group
+ add out0=16,sp // pass pointer to pt_regs as first arg
+ ;;
+ br.call.sptk.many b0=xen_evtchn_do_upcall
+ ;;
+ movl r20=XSI_PSR_I_ADDR
+ ;;
+ ld8 r20=[r20]
+ ;;
+ adds r20=-1,r20 // vcpu_info->evtchn_upcall_pending
+ ;;
+ ld1 r20=[r20]
+ ;;
+ cmp.ne p6,p0=r20,r0 // if there are pending events,
+ (p6) br.spnt.few 1b // call evtchn_do_upcall again.
+ br.sptk.many ia64_leave_kernel
+END(xen_event_callback)
+
+GLOBAL_ENTRY(xen_bsw1)
+ XEN_BSW_1(r14)
+ br.ret.sptk.many b0
+END(xen_bsw1)
--
1.5.3
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