1 files changed, 45 insertions, 0 deletions

diff --git a/arch/ia64/kernel/mca_drv_asm.S b/arch/ia64/kernel/mca_drv_asm.S
new file mode 100644
index 000000000000..bcfa05acc561
--- /dev/null
+++ b/arch/ia64/kernel/mca_drv_asm.S
@@ -0,0 +1,45 @@
+/*
+ * File:        mca_drv_asm.S
+ * Purpose:     Assembly portion of Generic MCA handling
+ *
+ * Copyright (C) 2004 FUJITSU LIMITED
+ * Copyright (C) Hidetoshi Seto (seto.hidetoshi@jp.fujitsu.com)
+ */
+#include <linux/config.h>
+#include <linux/threads.h>
+
+#include <asm/asmmacro.h>
+#include <asm/processor.h>
+
+GLOBAL_ENTRY(mca_handler_bhhook)
+        invala                                          // clear RSE ?
+        ;;                                              //
+        cover                                           // 
+        ;;                                              //
+        clrrrb                                          //
+        ;;                                              
+        alloc           r16=ar.pfs,0,2,1,0              // make a new frame
+        ;;
+        mov             r13=IA64_KR(CURRENT)            // current task pointer
+        ;;
+        adds            r12=IA64_TASK_THREAD_KSP_OFFSET,r13
+        ;;
+        ld8             r12=[r12]                       // stack pointer
+        ;;
+        mov             loc0=r16
+        movl            loc1=mca_handler_bh             // recovery C function
+        ;;
+        mov             out0=r8                         // poisoned address
+        mov             b6=loc1
+        ;;
+        mov             loc1=rp
+        ;;
+        br.call.sptk.many    rp=b6                      // not return ...
+        ;;
+        mov             ar.pfs=loc0
+        mov             rp=loc1
+        ;;
+        mov             r8=r0
+        br.ret.sptk.many rp
+        ;;
+END(mca_handler_bhhook)