77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
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#define USRTEXT NBPG
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#define USRSTACK (0-NBPG)
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (6*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (8*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (16*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (512*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ MAXDSIZ /* max stack size */
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#endif
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/*
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* Default sizes of swap allocation chunks (see dmap.h).
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* The actual values may be changed in vminit() based on MAXDSIZ.
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* With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024.
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* DMMIN should be at least ctod(1) so that vtod() works.
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* vminit() insures this.
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*/
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#define DMMIN 32 /* smallest swap allocation */
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#define DMMAX 4096 /* largest potential swap allocation */
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/*
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* The time for a process to be blocked before being very swappable.
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* This is a number of seconds which the system takes as being a non-trivial
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* amount of real time. You probably shouldn't change this;
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* it is used in subtle ways (fractions and multiples of it are, that is, like
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* half of a ``long time'', almost a long time, etc.)
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* It is related to human patience and other factors which don't really
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* change over time.
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*/
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#define MAXSLP 20
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/*
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* A swapped in process is given a small amount of core without being bothered
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* by the page replacement algorithm. Basically this says that if you are
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* swapped in you deserve some resources. We protect the last SAFERSS
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* pages against paging and will just swap you out rather than paging you.
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* Note that each process has at least UPAGES+CLSIZE pages which are not
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* paged anyways (this is currently 8+2=10 pages or 5k bytes), so this
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* number just means a swapped in process is given around 25k bytes.
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* Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81),
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* so we loan each swapped in process memory worth 100$, or just admit
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* that we don't consider it worthwhile and swap it out to disk which costs
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* $30/mb or about $0.75.
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*/
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#define SAFERSS 4 /* nominal ``small'' resident set size
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protected against replacement */
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/*
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* Mach derived constants
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*/
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/* user/kernel map constants */
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#define VM_MIN_ADDRESS ((vm_offset_t)0)
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#define VM_MAXUSER_ADDRESS ((vm_offset_t)0xFFF00000)
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#define VM_MAX_ADDRESS ((vm_offset_t)0xFFF00000)
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#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0x0E004000)
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#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFF000)
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES)
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#define VM_KMEM_SIZE (NKMEMCLUSTERS*CLBYTES)
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#define VM_PHYS_SIZE (USRIOSIZE*CLBYTES)
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