/[grub]/grub2/boot/powerpc/ieee1275/crt0.S
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revision 1.2 by okuji, Sun Apr 4 13:45:59 2004 UTC revision 1.3 by hollisb, Tue Oct 12 03:56:10 2004 UTC
# Line 32  Line 32 
32          .long   0xffffffff      /* virt-base */          .long   0xffffffff      /* virt-base */
33          .long   0xffffffff      /* virt-size */          .long   0xffffffff      /* virt-size */
34          .long   0x00030000      /* load-base */          .long   0x00030000      /* load-base */
35            
36    .extern __bss_start
37    .extern _end
38    
39          .text          .text
40          .align  2          .align  2
41          .globl  _start          .globl  _start
# Line 43  _start: Line 46  _start:
46    
47          li      2, 0          li      2, 0
48          li      13, 0          li      13, 0
           
49    
50          mr      3, 5              /* Stage1 won't zero BSS for us. In other cases, why not do it again?  */
51            lis     6, (__bss_start - 4)@h
52            ori     6, 6, (__bss_start - 4)@l
53            lis     7, (_end - 4)@h
54            ori     7, 7, (_end - 4)@l
55            subf    7, 6, 7
56            srwi    7, 7, 2 /* We store 4 bytes at a time.  */
57            mtctr   7
58    2:      stwu    2, 4(6) /* We know r2 is already 0 from above.  */
59            bdnz    2b
60    
61          bl      cmain          bl      cmain
62  1:      b       1b  1:      b       1b
63    

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