arch/sparc/prom/cif.S

   1 /* cif.S: PROM entry/exit assembler trampolines.
   2  *
   3  * Copyright (C) 1996, 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   4  * Copyright (C) 2005, 2006 David S. Miller <davem@davemloft.net>
   5  */
   6
   7 #include <asm/pstate.h>
   8 #include <asm/cpudata.h>
   9 #include <asm/thread_info.h>
  10
  11         .text
  12         .globl  prom_cif_direct
  13 prom_cif_direct:
  14         save    %sp, -192, %sp
  15         sethi   %hi(p1275buf), %o1
  16         or      %o1, %lo(p1275buf), %o1
  17         ldx     [%o1 + 0x0008], %l2     ! prom_cif_handler
  18         mov     %g4, %l0
  19         mov     %g5, %l1
  20         mov     %g6, %l3
  21         call    %l2
  22          mov    %i0, %o0                ! prom_args
  23         mov     %l0, %g4
  24         mov     %l1, %g5
  25         mov     %l3, %g6
  26         ret
  27          restore
  28
  29         .globl  prom_cif_callback
  30 prom_cif_callback:
  31         sethi   %hi(p1275buf), %o1
  32         or      %o1, %lo(p1275buf), %o1
  33         save    %sp, -192, %sp
  34         TRAP_LOAD_THREAD_REG(%g6, %g1)
  35         LOAD_PER_CPU_BASE(%g5, %g6, %g4, %g3, %o0)
  36         ldx     [%g6 + TI_TASK], %g4
  37         call    prom_world
  38          mov    0, %o0
  39         ldx     [%i1 + 0x000], %l2
  40         call    %l2
  41          mov    %i0, %o0
  42         mov     %o0, %l1
  43         call    prom_world
  44          mov    1, %o0
  45         ret
  46          restore %l1, 0, %o0
  47