mmSTM_STMHEBSR_OFFSET
WREG32(base_reg + mmSTM_STMHEBSR_OFFSET, 0);
WREG32(base_reg + mmSTM_STMHEBSR_OFFSET, 1);
WREG32(base_reg + mmSTM_STMHEBSR_OFFSET, 1);
WREG32(base_reg + mmSTM_STMHEBSR_OFFSET, 0);