SR_PRKEY
ofw_pmap.pm_sr[0] = KERNELN_SEGMENT(0)|SR_PRKEY;
ofw_pmap.pm_sr[KERNEL_SR] = KERNEL_SEGMENT|SR_SUKEY|SR_PRKEY;
ofw_pmap.pm_sr[KERNEL2_SR] = KERNEL2_SEGMENT|SR_SUKEY|SR_PRKEY;
pm->pm_sr[i] = VSID_MAKE(i, hash) | SR_PRKEY |
pmap_kernel()->pm_sr[i] = KERNELN_SEGMENT(i)|SR_PRKEY;
pmap_kernel()->pm_sr[KERNEL_SR] = KERNEL_SEGMENT|SR_SUKEY|SR_PRKEY;
pmap_kernel()->pm_sr[KERNEL2_SR] = KERNEL2_SEGMENT|SR_SUKEY|SR_PRKEY;
sr = PHYSMAPN_SEGMENT(0) | SR_SUKEY|SR_PRKEY;