PR_SBIER
mtpr(0, PR_SBIER);
((mcr)->mc_reg[2] = (M780_HIER|M780_ERLOG)); mtpr(3<<14, PR_SBIER);
mtpr(0, PR_SBIER);
((mcr)->mc_reg[2] = (M780_HIER|M780_ERLOG)); mtpr(3<<14, PR_SBIER);
mtpr(0, PR_SBIER);
((mcr)->mc_reg[3] = (M780_HIER|M780_ERLOG)); mtpr(3<<14, PR_SBIER);
mtpr(mfpr(PR_SBIER) | 0x70c0, PR_SBIER);