dmar_root_entry_t
dmar_root_entry_t *re;
void dmar_flush_root_to_ram(struct dmar_unit *unit, dmar_root_entry_t *dst);
#define DMAR_CTX_CNT (IOMMU_PAGE_SIZE / sizeof(dmar_root_entry_t))
dmar_flush_root_to_ram(struct dmar_unit *unit, dmar_root_entry_t *dst)