CONFIG_PMB is not available for thedefaultarchitecture x86.
Result is shown for architecture sh
Support 32-bit physical addressing through PMB
configname: CONFIG_PMB
Linux Kernel Configuration
└─>Memory management options
└─>Support 32-bit physical addressing through PMB
In linux kernel since version 2.6.25 (release Date: 2008-04-16)
If you say Y here, physical addressing will be extended to
32-bits through the SH-4A PMB. If this is not set, legacy
29-bit physical addressing will be used.
32-bits through the SH-4A PMB. If this is not set, legacy
29-bit physical addressing will be used.