arch/metag/kernel/head.S

   1         ! Copyright 2005,2006,2007,2009 Imagination Technologies
   2
   3 #include <linux/init.h>
   4 #include <generated/asm-offsets.h>
   5 #undef __exit
   6
   7         __HEAD
   8         ! Setup the stack and get going into _metag_start_kernel
   9         .global __start
  10         .type   __start,function
  11 __start:
  12         ! D1Ar1 contains pTBI (ISTAT)
  13         ! D0Ar2 contains pTBI
  14         ! D1Ar3 contains __pTBISegs
  15         ! D0Ar4 contains kernel arglist pointer
  16
  17         MOVT    D0Re0,#HI(___pTBIs)
  18         ADD     D0Re0,D0Re0,#LO(___pTBIs)
  19         SETL    [D0Re0],D0Ar2,D1Ar1
  20         MOVT    D0Re0,#HI(___pTBISegs)
  21         ADD     D0Re0,D0Re0,#LO(___pTBISegs)
  22         SETD    [D0Re0],D1Ar3
  23         MOV     A0FrP,#0
  24         MOV     D0Re0,#0
  25         MOV     D1Re0,#0
  26         MOV     D1Ar3,#0
  27         MOV     D1Ar1,D0Ar4                     !Store kernel boot params
  28         MOV     D1Ar5,#0
  29         MOV     D0Ar6,#0
  30 #ifdef CONFIG_METAG_DSP
  31         MOV     D0.8,#0
  32 #endif
  33         MOVT    A0StP,#HI(_init_thread_union)
  34         ADD     A0StP,A0StP,#LO(_init_thread_union)
  35         ADD     A0StP,A0StP,#THREAD_INFO_SIZE
  36         MOVT    D1RtP,#HI(_metag_start_kernel)
  37         CALL    D1RtP,#LO(_metag_start_kernel)
  38         .size   __start,.-__start
  39
  40         !! Needed by TBX
  41         .global __exit
  42         .type   __exit,function
  43 __exit:
  44         XOR     TXENABLE,D0Re0,D0Re0
  45         .size   __exit,.-__exit
  46
  47 #ifdef CONFIG_SMP
  48         .global _secondary_startup
  49         .type _secondary_startup,function
  50 _secondary_startup:
  51         MOVT    A0StP,#HI(_secondary_data_stack)
  52         ADD     A0StP,A0StP,#LO(_secondary_data_stack)
  53         GETD    A0StP,[A0StP]
  54         ADD     A0StP,A0StP,#THREAD_INFO_SIZE
  55         B       _secondary_start_kernel
  56         .size   _secondary_startup,.-_secondary_startup
  57 #endif