a180cee23b
deal with shortages of the VM maps where the backing pages are mapped (usually kmem_map). Try to deal with this: * Group all information about the backend allocator for a pool in a separate structure. The pool references this structure, rather than the individual fields. * Change the pool_init() API accordingly, and adjust all callers. * Link all pools using the same backend allocator on a list. * The backend allocator is responsible for waiting for physical memory to become available, but will still fail if it cannot callocate KVA space for the pages. If this happens, carefully drain all pools using the same backend allocator, so that some KVA space can be freed. * Change pool_reclaim() to indicate if it actually succeeded in freeing some pages, and use that information to make draining easier and more efficient. * Get rid of PR_URGENT. There was only one use of it, and it could be dealt with by the caller. From art@openbsd.org. |
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| README | ||
README
$NetBSD: README,v 1.1 2001/05/14 18:22:58 drochner Exp $ This is a port of NetBSD to the FIC8234 VME processor board, made by the swiss company CES (Geneve). These boards are (or have been) popular in high energy physics data acquisition (think of CERN!). See http://www.ces.ch/Products/CPUs/FIC8234/FIC8234.html for some technical data. The highlights: - MC68040 processor at 25 MHz (optional dual-processor) - 8 or 32 MByte RAM - 2 serial ports on Z85c30 - 79c900 (ILACC) ethernet - 53c710 SCSI The port is quite rudimentary at the moment. The kernel is started out of a running OS-9 system. SCSI support is not present yet, so it only works diskless with NFS (or ramdisk - not tested) root. It is good enough for multiuser, self-hosting etc. however. To start it: - make OS image by "objcopy --output-target=binary netbsd <imagename>" - load image to physical address 0x20100000 (RAM start + 1M) - jump to 0x20100400 For questions and contributions, contact Matthias Drochner (drochner@netbsd.org).