/arch/ppc/syslib/dcr.S

https://bitbucket.org/evzijst/gittest · Assembly · 41 lines · 23 code · 6 blank · 12 comment · 0 complexity · 226b0607329d8a0ab75fee69c04f3d90 MD5 · raw file 

    

  1. /*
    2. 

  2.  * arch/ppc/syslib/dcr.S
    3. 

  3.  *
    4. 

  4.  * "Indirect" DCR access
    5. 

  5.  *
    6. 

  6.  * Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net>
    7. 

  7.  *
    8. 

  8.  * This program is free software; you can redistribute it and/or modify it
    9. 

  9.  * under  the terms of  the GNU General Public License as published by the
    10. 

  10.  * Free Software Foundation;  either version 2 of the License, or (at your
    11. 

  11.  * option) any later version.
    12. 

  12.  */
    13. 

  13. 

  14. #include <asm/ppc_asm.h>
    15. 

  15. #include <asm/processor.h>
    16. 

  16. 

  17. #define DCR_ACCESS_PROLOG(table) \
    18. 

  18. 	rlwinm  r3,r3,4,18,27;   \
    19. 

  19. 	lis     r5,table@h;      \
    20. 

  20. 	ori     r5,r5,table@l;   \
    21. 

  21. 	add     r3,r3,r5;        \
    22. 

  22. 	mtctr   r3;              \
    23. 

  23. 	bctr
    24. 

  24. 

  25. _GLOBAL(__mfdcr)
    26. 

  26. 	DCR_ACCESS_PROLOG(__mfdcr_table)
    27. 

  27. 

  28. _GLOBAL(__mtdcr)
    29. 

  29. 	DCR_ACCESS_PROLOG(__mtdcr_table)
    30. 

  30. 

  31. __mfdcr_table:
    32. 

  32. 	mfdcr  r3,0; blr
    33. 

  33. __mtdcr_table:
    34. 

  34. 	mtdcr  0,r4; blr
    35. 

  35. 

  36. dcr     = 1
    37. 

  37.         .rept   1023
    38. 

  38. 	mfdcr   r3,dcr; blr
    39. 

  39. 	mtdcr   dcr,r4; blr
    40. 

  40. 	dcr     = dcr + 1
    41. 

  41. 	.endr
    42.