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Annotation of sys/arch/m88k/include/vmparam.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: vmparam.h,v 1.8 2006/06/04 17:20:39 miod Exp $ */
        !             2: /*
        !             3:  * Mach Operating System
        !             4:  * Copyright (c) 1992 Carnegie Mellon University
        !             5:  * All Rights Reserved.
        !             6:  *
        !             7:  * Permission to use, copy, modify and distribute this software and its
        !             8:  * documentation is hereby granted, provided that both the copyright
        !             9:  * notice and this permission notice appear in all copies of the
        !            10:  * software, derivative works or modified versions, and any portions
        !            11:  * thereof, and that both notices appear in supporting documentation.
        !            12:  *
        !            13:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            14:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            15:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            16:  *
        !            17:  * Carnegie Mellon requests users of this software to return to
        !            18:  *
        !            19:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
        !            20:  *  School of Computer Science
        !            21:  *  Carnegie Mellon University
        !            22:  *  Pittsburgh PA 15213-3890
        !            23:  *
        !            24:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            25:  * the rights to redistribute these changes.
        !            26:  */
        !            27:
        !            28: /*
        !            29:  *     machine dependent virtual memory parameters.
        !            30:  */
        !            31:
        !            32:
        !            33: #ifndef        _MACHINE_VM_PARAM_
        !            34: #define _MACHINE_VM_PARAM_
        !            35:
        !            36: /*
        !            37:  * USRTEXT is the start of the user text/data space, while USRSTACK
        !            38:  * is the top (end) of the user stack.
        !            39:  */
        !            40: #define        USRTEXT         0x1000                  /* Start of user text */
        !            41: #define        USRSTACK        VM_MAXUSER_ADDRESS      /* Start of user stack */
        !            42:
        !            43: /*
        !            44:  * Virtual memory related constants, all in bytes
        !            45:  */
        !            46: #ifndef MAXTSIZ
        !            47: #define        MAXTSIZ         (8*1024*1024)           /* max text size */
        !            48: #endif
        !            49: #ifndef DFLDSIZ
        !            50: #define        DFLDSIZ         (32*1024*1024)          /* initial data size limit */
        !            51: #endif
        !            52: #ifndef MAXDSIZ
        !            53: #define        MAXDSIZ         (64*1024*1024)          /* max data size */
        !            54: #endif
        !            55: #ifndef        DFLSSIZ
        !            56: #define        DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
        !            57: #endif
        !            58: #ifndef        MAXSSIZ
        !            59: #define        MAXSSIZ         MAXDSIZ                 /* max stack size */
        !            60: #endif
        !            61:
        !            62: #define STACKGAP_RANDOM        256*1024
        !            63:
        !            64: /*
        !            65:  * Size of shared memory map
        !            66:  */
        !            67: #ifndef SHMMAXPGS
        !            68: #define SHMMAXPGS      1024
        !            69: #endif
        !            70:
        !            71: #define        VM_MIN_ADDRESS          ((vaddr_t)0)
        !            72: #define        VM_MAX_ADDRESS          ((vaddr_t)0xfffff000)
        !            73: #define VM_MAXUSER_ADDRESS     VM_MAX_ADDRESS
        !            74:
        !            75: /*
        !            76:  * Although user and supervisor address spaces are separate, we limit
        !            77:  * ourselves to 512KB KVM because the kernel page table is statically
        !            78:  * allocated.
        !            79:  */
        !            80: #define VM_MIN_KERNEL_ADDRESS  ((vaddr_t)0)
        !            81: #define VM_MAX_KERNEL_ADDRESS  ((vaddr_t)0x20000000)
        !            82:
        !            83: /* virtual sizes (bytes) for various kernel submaps */
        !            84: #define VM_PHYS_SIZE           (1 * NPTEPG * PAGE_SIZE)
        !            85:
        !            86: /*
        !            87:  * Constants which control the way the VM system deals with memory segments.
        !            88:  * The mvme88k only has one physical memory segment.
        !            89:  */
        !            90: #define        VM_PHYSSEG_MAX          1
        !            91: #define        VM_PHYSSEG_STRAT        VM_PSTRAT_RANDOM
        !            92: #define        VM_PHYSSEG_NOADD
        !            93:
        !            94: #define VM_NFREELIST           1
        !            95: #define VM_FREELIST_DEFAULT    0
        !            96:
        !            97: #ifndef _LOCORE
        !            98: /*
        !            99:  * pmap-specific data stored in the vm_physmem[] array.
        !           100:  */
        !           101:
        !           102: /* XXX - belongs in pmap.h, but put here because of ordering issues */
        !           103: struct pv_entry {
        !           104:        struct pv_entry *pv_next;       /* next pv_entry */
        !           105:        struct pmap     *pv_pmap;       /* pmap where mapping lies */
        !           106:        vaddr_t         pv_va;          /* virtual address for mapping */
        !           107:        int             pv_flags;
        !           108: };
        !           109:
        !           110: #define        __HAVE_VM_PAGE_MD
        !           111: struct vm_page_md {
        !           112:        struct pv_entry pvent;
        !           113: };
        !           114:
        !           115: #define        VM_MDPAGE_INIT(pg) do {                 \
        !           116:        (pg)->mdpage.pvent.pv_next = NULL;      \
        !           117:        (pg)->mdpage.pvent.pv_pmap = NULL;      \
        !           118:        (pg)->mdpage.pvent.pv_va = 0;           \
        !           119:        (pg)->mdpage.pvent.pv_flags = 0;        \
        !           120: } while (0)
        !           121:
        !           122: #endif /* _LOCORE */
        !           123:
        !           124: #endif /* _MACHINE_VM_PARAM_ */