/* $OpenBSD: vmparam.h,v 1.6 1999/09/27 20:46:19 smurph Exp $ */ /* * Mach Operating System * Copyright (c) 1992 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* * HISTORY */ /* * File: vm_param.h * * machine dependent virtual memory parameters. * Most of the declarations are preceeded by M88K_ (or m88k_) * which is OK because only M88K specific code will be using * them. */ #ifndef _MACHINE_VM_PARAM_ #define _MACHINE_VM_PARAM_ /* * USRTEXT is the start of the user text/data space, while USRSTACK * is the top (end) of the user stack. */ #define USRTEXT 0x1000 /* Start of user text */ #define USRSTACK 0x80000000 /* Start of user stack */ /* * Virtual memory related constants, all in bytes */ #ifndef MAXTSIZ #define MAXTSIZ (8*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (16*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (64*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (512*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ MAXDSIZ /* max stack size */ #endif /* * External IO space map size. */ #ifndef EIOMAPSIZE #define EIOMAPSIZE 1024 /* in pages */ #endif /* * Default sizes of swap allocation chunks (see dmap.h). * The actual values may be changed in vminit() based on MAXDSIZ. * With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024. * DMMIN should be at least ctod(1) so that vtod() works. * vminit() insures this. */ #define DMMIN 32 /* smallest swap allocation */ #define DMMAX 4096 /* largest potential swap allocation */ #define DMTEXT 1024 /* swap allocation for text */ /* * Size of shared memory map */ #ifndef SHMMAXPGS #define SHMMAXPGS 1024 #endif /* * The time for a process to be blocked before being very swappable. * This is a number of seconds which the system takes as being a non-trivial * amount of real time. You probably shouldn't change this; * it is used in subtle ways (fractions and multiples of it are, that is, like * half of a ``long time'', almost a long time, etc.) * It is related to human patience and other factors which don't really * change over time. */ #define MAXSLP 20 /* * A swapped in process is given a small amount of core without being bothered * by the page replacement algorithm. Basically this says that if you are * swapped in you deserve some resources. We protect the last SAFERSS * pages against paging and will just swap you out rather than paging you. * Note that each process has at least UPAGES+CLSIZE pages which are not * paged anyways (this is currently 8+2=10 pages or 5k bytes), so this * number just means a swapped in process is given around 25k bytes. * Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81), * so we loan each swapped in process memory worth 100$, or just admit * that we don't consider it worthwhile and swap it out to disk which costs * $30/mb or about $0.75. */ #define SAFERSS 4 /* nominal ``small'' resident set size protected against replacement */ #define VM_MINUSER_ADDRESS ((vm_offset_t) 0) #define VM_MAXUSER_ADDRESS ((vm_offset_t) 0xffc00000U) #define VM_MINKERNEL_ADDRESS ((vm_offset_t) 0) #define VM_MAXKERNEL_ADDRESS ((vm_offset_t) 0x1fffffff) /* * Mach derived constants */ #define BYTE_SIZE 8 /* byte size in bits */ #define M88K_PGBYTES (1<<12) /* bytes per m88k page */ #define M88K_PGSHIFT 12 /* number of bits to shift for pages */ /* * Convert bytes to pages and convert pages to bytes. * No rounding is used. */ #define m88k_btop(x) (((unsigned)(x)) >> M88K_PGSHIFT) #define m88k_ptob(x) (((unsigned)(x)) << M88K_PGSHIFT) /* * Round off or truncate to the nearest page. These will work * for either addresses or counts. (i.e. 1 byte rounds to 1 page * bytes. */ #define m88k_round_page(x) ((((unsigned)(x)) + M88K_PGBYTES - 1) & \ ~(M88K_PGBYTES-1)) #define m88k_trunc_page(x) (((unsigned)(x)) & ~(M88K_PGBYTES-1)) #define VM_MIN_ADDRESS ((vm_offset_t) 0) #define VM_MAX_ADDRESS ((vm_offset_t) 0xffc00000U) #define VM_MIN_USER_ADDRESS ((vm_offset_t) 0) #define VM_MAX_USER_ADDRESS ((vm_offset_t) 0xffc00000U) /* on vme188, max = 0xf0000000 */ #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0) #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0x1fffffff) #define KERNEL_STACK_SIZE (3*4096) /* kernel stack size */ #define INTSTACK_SIZE (3*4096) /* interrupt stack size */ /* virtual sizes (bytes) for various kernel submaps */ #define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES) #define VM_KMEM_SIZE (NKMEMCLUSTERS*CLBYTES) /* * Conversion between MACHINE pages and VM pages */ #define trunc_m88k_to_vm(p) (atop(trunc_page(m88k_ptob(p)))) #define round_m88k_to_vm(p) (atop(round_page(m88k_ptob(p)))) #define vm_to_m88k(p) (m88k_btop(ptoa(p))) #if 1 /*Do we really need all this stuff*/ #if 1 /*Do we really need all this stuff*/ #if 1 /*Do we really need all this stuff*/ #define M88K_SGPAGES (1<<10) /* pages per m88k segment */ #define M88K_SGPGSHIFT 10 /* number of bits to shift for segment-page */ #define M88K_ALSEGMS (1<<10) /* segments per m88k all space */ #define M88K_ALSGSHIFT 10 /* number of bits to shift for all-segment */ #define M88K_SGBYTES (1<<22) /* bytes per m88k segments */ #define M88K_SGSHIFT 22 /* number of bits to shift for segment */ #define M88K_ALPAGES (1<<20) /* pages per m88k all space */ #define M88K_ALPGSHIFT 20 /* number of bits to shift for all-page */ /* * Convert bytes to pages and convert pages to bytes. * No rounding is used. */ #define m88k_btopr(x) (((unsigned)(x) + (M88K_PGBYTES - 1)) >> M88K_PGSHIFT) #define m88k_btosr(x) (((unsigned)(x) + (M88K_SGBYTES - 1)) >> M88K_SGSHIFT) #define m88k_btos(x) (((unsigned)(x)) >> M88K_SGSHIFT) #define m88k_stob(x) (((unsigned)(x)) << M88K_SGSHIFT) #define m88k_ptosr(x) (((unsigned)(x) + (M88K_SGPAGES - 1)) >> M88K_SGPGSHIFT) #define m88k_ptos(x) (((unsigned)(x)) >> M88K_SGPGSHIFT) #define m88k_stop(x) (((unsigned)(x)) << M88K_SGPGSHIFT) /* * Round off or truncate to the nearest page. These will work * for either addresses or counts. (i.e. 1 byte rounds to 1 page * bytes. */ #define m88k_round_segm(x) ((((unsigned)(x)) + M88K_SGBYTES - 1) & \ ~(M88K_SGBYTES-1)) #define m88k_next_segm(x) ((((unsigned)(x)) & ~(M88K_SGBYTES-1)) + \ M88K_SGBYTES) #define m88k_trunc_segm(x) (((unsigned)(x)) & ~(M88K_SGBYTES-1)) #define m88k_round_seg(x) ((((unsigned)(x)) + M88K_SGBYTES - 1) & \ ~(M88K_SGBYTES-1)) #define m88k_trunc_seg(x) (((unsigned)(x)) & ~(M88K_SGBYTES-1)) #define VEQR_ADDR 0x20000000 /* kernel virtual eq phy mapping */ #endif /* Do we really need all this stuff */ #endif /* Do we really need all this stuf */ #endif /* Do we really need all this stuff */ #endif _MACHINE_VM_PARAM_