ae27edc757
- Map in all physical memory first in system space. This reduces pmap_copy_page() and pmap_zero_page to 3 resp. 2 instructions. - Have fized position user page tables. Makes the pv_table smaller and all reverse references faster (and simpler). - Remove the wiring code. Nobody doesn't even know what a DR32 is anymore. - Simulate page reference bit by setting page invalid, as suggested by Rich Draves in a paper for 1991 Mach Usenix Symposium. This reduced the time spent in the pmap module to between 70-75% of the previous; and made process startup _much_ faster.