drivers/char/hw_random/n2-asm.S

   1 /* n2-asm.S: Niagara2 RNG hypervisor call assembler.
   2  *
   3  * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
   4  */
   5 #include <linux/linkage.h>
   6 #include <asm/hypervisor.h>
   7 #include "n2rng.h"
   8
   9         .text
  10
  11 ENTRY(sun4v_rng_get_diag_ctl)
  12         mov     HV_FAST_RNG_GET_DIAG_CTL, %o5
  13         ta      HV_FAST_TRAP
  14         retl
  15          nop
  16 ENDPROC(sun4v_rng_get_diag_ctl)
  17
  18 ENTRY(sun4v_rng_ctl_read_v1)
  19         mov     %o1, %o3
  20         mov     %o2, %o4
  21         mov     HV_FAST_RNG_CTL_READ, %o5
  22         ta      HV_FAST_TRAP
  23         stx     %o1, [%o3]
  24         retl
  25          stx    %o2, [%o4]
  26 ENDPROC(sun4v_rng_ctl_read_v1)
  27
  28 ENTRY(sun4v_rng_ctl_read_v2)
  29         save    %sp, -192, %sp
  30         mov     %i0, %o0
  31         mov     %i1, %o1
  32         mov     HV_FAST_RNG_CTL_READ, %o5
  33         ta      HV_FAST_TRAP
  34         stx     %o1, [%i2]
  35         stx     %o2, [%i3]
  36         stx     %o3, [%i4]
  37         stx     %o4, [%i5]
  38         ret
  39         restore %g0, %o0, %o0
  40 ENDPROC(sun4v_rng_ctl_read_v2)
  41
  42 ENTRY(sun4v_rng_ctl_write_v1)
  43         mov     %o3, %o4
  44         mov     HV_FAST_RNG_CTL_WRITE, %o5
  45         ta      HV_FAST_TRAP
  46         retl
  47          stx    %o1, [%o4]
  48 ENDPROC(sun4v_rng_ctl_write_v1)
  49
  50 ENTRY(sun4v_rng_ctl_write_v2)
  51         mov     HV_FAST_RNG_CTL_WRITE, %o5
  52         ta      HV_FAST_TRAP
  53         retl
  54          nop
  55 ENDPROC(sun4v_rng_ctl_write_v2)
  56
  57 ENTRY(sun4v_rng_data_read_diag_v1)
  58         mov     %o2, %o4
  59         mov     HV_FAST_RNG_DATA_READ_DIAG, %o5
  60         ta      HV_FAST_TRAP
  61         retl
  62          stx    %o1, [%o4]
  63 ENDPROC(sun4v_rng_data_read_diag_v1)
  64
  65 ENTRY(sun4v_rng_data_read_diag_v2)
  66         mov     %o3, %o4
  67         mov     HV_FAST_RNG_DATA_READ_DIAG, %o5
  68         ta      HV_FAST_TRAP
  69         retl
  70          stx    %o1, [%o4]
  71 ENDPROC(sun4v_rng_data_read_diag_v2)
  72
  73 ENTRY(sun4v_rng_data_read)
  74         mov     %o1, %o4
  75         mov     HV_FAST_RNG_DATA_READ, %o5
  76         ta      HV_FAST_TRAP
  77         retl
  78          stx    %o1, [%o4]
  79 ENDPROC(sun4v_rng_data_read)