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| /freebsd-10.0-release/sys/powerpc/aim/ | ||
| H A D | mmu_oea.c | diff 125442 Wed Feb 04 11:16:21 MST 2004 grehan Remove pmap_pvo_allocf zone alloc function. It was a way of using the direct-mapping of physmem to force PTE data structures to be physically addressable so the interrupt-time real-mode DSI trap handler could perform PTE spills. However, the memory may have been > 256Mb, which would have caused a BAT spill and double-interrupt. The new trap code no longer handles PTE spills, so the requirement that these pages be direct-mapped no longer applies. The irony is UMA_MD_SMALL_ALLOC will return direct mappings for these structs :-) |
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