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   1 #ifndef BPA_IOMMU_H
   2 #define BPA_IOMMU_H
   3
   4 /* some constants */
   5 enum {
   6         /* segment table entries */
   7         IOST_VALID_MASK   = 0x8000000000000000ul,
   8         IOST_TAG_MASK     = 0x3000000000000000ul,
   9         IOST_PT_BASE_MASK = 0x000003fffffff000ul,
  10         IOST_NNPT_MASK    = 0x0000000000000fe0ul,
  11         IOST_PS_MASK      = 0x000000000000000ful,
  12
  13         IOST_PS_4K        = 0x1,
  14         IOST_PS_64K       = 0x3,
  15         IOST_PS_1M        = 0x5,
  16         IOST_PS_16M       = 0x7,
  17
  18         /* iopt tag register */
  19         IOPT_VALID_MASK   = 0x0000000200000000ul,
  20         IOPT_TAG_MASK     = 0x00000001fffffffful,
  21
  22         /* iopt cache register */
  23         IOPT_PROT_MASK    = 0xc000000000000000ul,
  24         IOPT_PROT_NONE    = 0x0000000000000000ul,
  25         IOPT_PROT_READ    = 0x4000000000000000ul,
  26         IOPT_PROT_WRITE   = 0x8000000000000000ul,
  27         IOPT_PROT_RW      = 0xc000000000000000ul,
  28         IOPT_COHERENT     = 0x2000000000000000ul,
  29
  30         IOPT_ORDER_MASK   = 0x1800000000000000ul,
  31         /* order access to same IOID/VC on same address */
  32         IOPT_ORDER_ADDR   = 0x0800000000000000ul,
  33         /* similar, but only after a write access */
  34         IOPT_ORDER_WRITES = 0x1000000000000000ul,
  35         /* Order all accesses to same IOID/VC */
  36         IOPT_ORDER_VC     = 0x1800000000000000ul,
  37
  38         IOPT_RPN_MASK     = 0x000003fffffff000ul,
  39         IOPT_HINT_MASK    = 0x0000000000000800ul,
  40         IOPT_IOID_MASK    = 0x00000000000007fful,
  41
  42         IOSTO_ENABLE      = 0x8000000000000000ul,
  43         IOSTO_ORIGIN      = 0x000003fffffff000ul,
  44         IOSTO_HW          = 0x0000000000000800ul,
  45         IOSTO_SW          = 0x0000000000000400ul,
  46
  47         IOCMD_CONF_TE     = 0x0000800000000000ul,
  48
  49         /* memory mapped registers */
  50         IOC_PT_CACHE_DIR  = 0x000,
  51         IOC_ST_CACHE_DIR  = 0x800,
  52         IOC_PT_CACHE_REG  = 0x910,
  53         IOC_ST_ORIGIN     = 0x918,
  54         IOC_CONF          = 0x930,
  55
  56         /* The high bit needs to be set on every DMA address,
  57            only 2GB are addressable */
  58         BPA_DMA_VALID     = 0x80000000,
  59         BPA_DMA_MASK      = 0x7fffffff,
  60 };
  61
  62
  63 void bpa_init_iommu(void);
  64
  65 #endif