reactos/boot/freeldr/bootsect/ofwboot.s

   1         .section .text
   2
   3 _start:
   4         .long   0xe00000 + 12
   5         .long   0
   6         .long   0
   7
   8         .globl _begin
   9 _begin:
  10         sync
  11         isync
  12
  13         lis     %r1,stack@ha
  14         addi    %r1,%r1,stack@l
  15         addi    %r1,%r1,16384 - 0x10
  16
  17         /* Store ofw call addr */
  18         mr      %r21,%r5
  19         lis     %r10,0xe00000@ha
  20         stw     %r5,ofw_call_addr - _start@l(%r10)
  21
  22         lis     %r3,0xe00000@ha
  23         addi    %r3,%r3,freeldr_banner - _start
  24
  25         bl      ofw_print_string
  26         bl      ofw_print_eol
  27         bl      zero_registers
  28
  29         /* Zero CTR */
  30         mtcr    %r31
  31
  32         lis     %r3,0xe17000@ha
  33         addi    %r3,%r3,0xe17000@l
  34
  35         mtlr    %r3
  36
  37         lis     %r3,call_ofw@ha
  38         addi    %r3,%r3,call_ofw - _start
  39
  40         b       call_freeldr
  41
  42 zero_registers:
  43         xor     %r2,%r2,%r2
  44         mr      %r0,%r2
  45         mr      %r3,%r2
  46
  47         mr      %r4,%r2
  48         mr      %r5,%r2
  49         mr      %r6,%r2
  50         mr      %r7,%r2
  51
  52         mr      %r8,%r2
  53         mr      %r9,%r2
  54         mr      %r10,%r2
  55         mr      %r11,%r2
  56
  57         mr      %r12,%r2
  58         mr      %r13,%r2
  59         mr      %r14,%r2
  60         mr      %r15,%r2
  61
  62         mr      %r12,%r2
  63         mr      %r13,%r2
  64         mr      %r14,%r2
  65         mr      %r15,%r2
  66
  67         mr      %r16,%r2
  68         mr      %r17,%r2
  69         mr      %r18,%r2
  70         mr      %r19,%r2
  71
  72         mr      %r20,%r2
  73         mr      %r21,%r2
  74         mr      %r22,%r2
  75         mr      %r23,%r2
  76
  77         mr      %r24,%r2
  78         mr      %r25,%r2
  79         mr      %r26,%r2
  80         mr      %r27,%r2
  81
  82         mr      %r28,%r2
  83         mr      %r29,%r2
  84         mr      %r30,%r2
  85         mr      %r31,%r2
  86
  87         blr
  88
  89 freeldr_banner:
  90         .ascii  "ReactOS OpenFirmware Boot Program\r\n\0"
  91
  92 freeldr_halt:
  93         .ascii  "ReactOS OpenFirmware Boot Program Halting\r\n\0"
  94
  95 ofw_memory_size:
  96         .long   0
  97         .long   0
  98         .long   0
  99         .long   0
 100
 101         .org    0x1000
 102 stack:
 103         .space  0x4000
 104