root/arch/sparc/prom/cif.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* cif.S: PROM entry/exit assembler trampolines.
   3  *
   4  * Copyright (C) 1996, 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 2005, 2006 David S. Miller <davem@davemloft.net>
   6  */
   7 
   8 #include <asm/pstate.h>
   9 #include <asm/cpudata.h>
  10 #include <asm/thread_info.h>
  11 
  12         .text
  13         .globl  prom_cif_direct
  14 prom_cif_direct:
  15         save    %sp, -192, %sp
  16         sethi   %hi(p1275buf), %o1
  17         or      %o1, %lo(p1275buf), %o1
  18         ldx     [%o1 + 0x0008], %l2     ! prom_cif_handler
  19         mov     %g4, %l0
  20         mov     %g5, %l1
  21         mov     %g6, %l3
  22         call    %l2
  23          mov    %i0, %o0                ! prom_args
  24         mov     %l0, %g4
  25         mov     %l1, %g5
  26         mov     %l3, %g6
  27         ret
  28          restore
  29 
  30         .globl  prom_cif_callback
  31 prom_cif_callback:
  32         sethi   %hi(p1275buf), %o1
  33         or      %o1, %lo(p1275buf), %o1
  34         save    %sp, -192, %sp
  35         TRAP_LOAD_THREAD_REG(%g6, %g1)
  36         LOAD_PER_CPU_BASE(%g5, %g6, %g4, %g3, %o0)
  37         ldx     [%g6 + TI_TASK], %g4
  38         call    prom_world
  39          mov    0, %o0
  40         ldx     [%i1 + 0x000], %l2
  41         call    %l2
  42          mov    %i0, %o0
  43         mov     %o0, %l1
  44         call    prom_world
  45          mov    1, %o0
  46         ret
  47          restore %l1, 0, %o0
  48