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Diffstat (limited to 'sys/arch/mvme88k/include/vmparam.h')
| -rw-r--r-- | sys/arch/mvme88k/include/vmparam.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/sys/arch/mvme88k/include/vmparam.h b/sys/arch/mvme88k/include/vmparam.h new file mode 100644 index 00000000000..586fb83fe38 --- /dev/null +++ b/sys/arch/mvme88k/include/vmparam.h @@ -0,0 +1,219 @@ +/* + * 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 + +/* + * 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_ |