arch/ia64/xen/xensetup.S

   1 /*
   2  * Support routines for Xen
   3  *
   4  * Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@hp.com>
   5  */
   6
   7 #include <asm/processor.h>
   8 #include <asm/asmmacro.h>
   9
  10 #define isBP    p3      // are we the Bootstrap Processor?
  11
  12         .text
  13 GLOBAL_ENTRY(early_xen_setup)
  14         mov r8=ar.rsc           // Initialized in head.S
  15 (isBP)  movl r9=running_on_xen;;
  16         extr.u r8=r8,2,2;;      // Extract pl fields
  17         cmp.eq p7,p0=r8,r0      // p7: !running on xen
  18         mov r8=1                // booleanize.
  19 (p7)    br.ret.sptk.many rp;;
  20 (isBP)  st4 [r9]=r8
  21         movl r10=xen_ivt;;
  22
  23         mov cr.iva=r10
  24
  25 #if XSI_BASE != 0xf100000000000000UL
  26         /* Backward compatibility.  */
  27 (isBP)  mov r2=0x600
  28 (isBP)  movl r28=XSI_BASE;;
  29 (isBP)  break 0x1000;;
  30 #endif
  31
  32         br.ret.sptk.many rp
  33         ;;
  34 END(early_xen_setup)
  35
  36 #include <xen/interface/xen.h>
  37
  38 /* Stub for suspend.
  39    Just force the stacked registers to be written in memory.  */
  40 GLOBAL_ENTRY(HYPERVISOR_suspend)
  41         alloc r20=ar.pfs,0,0,0,0
  42         mov r14=2
  43         mov r15=r12
  44         ;;
  45         /* We don't want to deal with RSE.  */
  46         flushrs
  47         mov r2=__HYPERVISOR_sched_op
  48         st4 [r12]=r14
  49         ;;
  50         break 0x1000
  51         ;;
  52         mov ar.pfs=r20
  53         br.ret.sptk.many b0
  54 END(HYPERVISOR_suspend)