ARM_SMMU_CB_ACTLR
reg = arm_smmu_cb_read(smmu, i, ARM_SMMU_CB_ACTLR);
arm_smmu_cb_write(smmu, i, ARM_SMMU_CB_ACTLR, reg);
reg = arm_smmu_cb_read(smmu, i, ARM_SMMU_CB_ACTLR);
reg = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_ACTLR);
arm_smmu_cb_write(smmu, cfg->cbndx, ARM_SMMU_CB_ACTLR, reg);
arm_smmu_cb_write(smmu, cbndx, ARM_SMMU_CB_ACTLR, (unsigned long)match->data);