arch/ia64/kernel/mca_drv_asm.S

   1 /*
   2  * File:        mca_drv_asm.S
   3  * Purpose:     Assembly portion of Generic MCA handling
   4  *
   5  * Copyright (C) 2004 FUJITSU LIMITED
   6  * Copyright (C) Hidetoshi Seto (seto.hidetoshi@jp.fujitsu.com)
   7  */
   8 #include <linux/config.h>
   9 #include <linux/threads.h>
  10
  11 #include <asm/asmmacro.h>
  12 #include <asm/processor.h>
  13
  14 GLOBAL_ENTRY(mca_handler_bhhook)
  15         invala                                          // clear RSE ?
  16         ;;                                              //
  17         cover                                           //
  18         ;;                                              //
  19         clrrrb                                          //
  20         ;;
  21         alloc           r16=ar.pfs,0,2,1,0              // make a new frame
  22         ;;
  23         mov             r13=IA64_KR(CURRENT)            // current task pointer
  24         ;;
  25         adds            r12=IA64_TASK_THREAD_KSP_OFFSET,r13
  26         ;;
  27         ld8             r12=[r12]                       // stack pointer
  28         ;;
  29         mov             loc0=r16
  30         movl            loc1=mca_handler_bh             // recovery C function
  31         ;;
  32         mov             out0=r8                         // poisoned address
  33         mov             b6=loc1
  34         ;;
  35         mov             loc1=rp
  36         ;;
  37         br.call.sptk.many    rp=b6                      // not return ...
  38         ;;
  39         mov             ar.pfs=loc0
  40         mov             rp=loc1
  41         ;;
  42         mov             r8=r0
  43         br.ret.sptk.many rp
  44         ;;
  45 END(mca_handler_bhhook)