/arch/powerpc/include/asm/tce.h

http://github.com/mirrors/linux · C Header · 38 lines · 18 code · 8 blank · 12 comment · 0 complexity · 5ac33181097b41db4ead92fa998d6e22 MD5 · raw file 

    

  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
    2. 

  2. /*
    3. 

  3.  * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
    4. 

  4.  * Rewrite, cleanup:
    5. 

  5.  * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation
    6. 

  6.  */
    7. 

  7. 

  8. #ifndef _ASM_POWERPC_TCE_H
    9. 

  9. #define _ASM_POWERPC_TCE_H
    10. 

  10. #ifdef __KERNEL__
    11. 

  11. 

  12. #include <asm/iommu.h>
    13. 

  13. 

  14. /*
    15. 

  15.  * Tces come in two formats, one for the virtual bus and a different
    16. 

  16.  * format for PCI.  PCI TCEs can have hardware or software maintianed
    17. 

  17.  * coherency.
    18. 

  18.  */
    19. 

  19. #define TCE_VB			0
    20. 

  20. #define TCE_PCI			1
    21. 

  21. 

  22. /* TCE page size is 4096 bytes (1 << 12) */
    23. 

  23. 

  24. #define TCE_SHIFT	12
    25. 

  25. #define TCE_PAGE_SIZE	(1 << TCE_SHIFT)
    26. 

  26. 

  27. #define TCE_ENTRY_SIZE		8		/* each TCE is 64 bits */
    28. 

  28. 

  29. #define TCE_RPN_MASK		0xfffffffffful  /* 40-bit RPN (4K pages) */
    30. 

  30. #define TCE_RPN_SHIFT		12
    31. 

  31. #define TCE_VALID		0x800		/* TCE valid */
    32. 

  32. #define TCE_ALLIO		0x400		/* TCE valid for all lpars */
    33. 

  33. #define TCE_PCI_WRITE		0x2		/* write from PCI allowed */
    34. 

  34. #define TCE_PCI_READ		0x1		/* read from PCI allowed */
    35. 

  35. #define TCE_VB_WRITE		0x1		/* write from VB allowed */
    36. 

  36. 

  37. #endif /* __KERNEL__ */
    38. 

  38. #endif /* _ASM_POWERPC_TCE_H */
    39.