arch/metag/kernel/tbiunexp.S

   1 /* Pass a breakpoint through to Codescape */
   2
   3 #include <asm/tbx.h>
   4
   5         .text
   6         .global ___TBIUnExpXXX
   7         .type   ___TBIUnExpXXX,function
   8 ___TBIUnExpXXX:
   9         TSTT    D0Ar2,#TBICTX_CRIT_BIT  ! Result of nestable int call?
  10         BZ      $LTBINormCase           ! UnExpXXX at background level
  11         MOV     D0Re0,TXMASKI           ! Read TXMASKI
  12         XOR     TXMASKI,D1Re0,D1Re0     ! Turn off BGNDHALT handling!
  13         OR      D0Ar2,D0Ar2,D0Re0       ! Preserve bits cleared
  14 $LTBINormCase:
  15         MSETL   [A0StP],D0Ar6,D0Ar4,D0Ar2       ! Save args on stack
  16         SETL    [A0StP++],D0Ar2,D1Ar1   ! Init area for returned values
  17         SWITCH  #0xC20208               ! Total stack frame size 8 Dwords
  18                                         !            write back size 2 Dwords
  19         GETL    D0Re0,D1Re0,[--A0StP]   ! Get result
  20         SUB     A0StP,A0StP,#(8*3)      ! Recover stack frame
  21         MOV     PC,D1RtP
  22         .size           ___TBIUnExpXXX,.-___TBIUnExpXXX