Модуль управления памятью ввода-вывода IOMMU: список регистров

  TTB

Level1 page table starting address, aligned to 16 KB.
When operating the register, IOMMU address mapping function must be closed, namely IOMMU_ENABLE_REG is 0;
Or Bypass function of all main equipment is set to 1, or no the state of transfer bus commands (such as setting).

  Unused

Команда U-Boot для чтения регистра

Bit fields structure

typedef union  iommu_ttb_reg
{
  struct
  {
   unsigned unused0 : 14;
   unsigned ttb : 18;
  } b;
   unsigned long w;
} IOMMU_TTB_REG