Annotation of sys/arch/vax/include/pmap.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pmap.h,v 1.28 2007/04/22 10:05:51 miod Exp $ */
! 2: /* $NetBSD: pmap.h,v 1.37 1999/08/01 13:48:07 ragge Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1987 Carnegie-Mellon University
! 6: * Copyright (c) 1991 Regents of the University of California.
! 7: * All rights reserved.
! 8: *
! 9: * Changed for the VAX port. /IC
! 10: *
! 11: * This code is derived from software contributed to Berkeley by
! 12: * the Systems Programming Group of the University of Utah Computer
! 13: * Science Department.
! 14: *
! 15: * Redistribution and use in source and binary forms, with or without
! 16: * modification, are permitted provided that the following conditions
! 17: * are met:
! 18: * 1. Redistributions of source code must retain the above copyright
! 19: * notice, this list of conditions and the following disclaimer.
! 20: * 2. Redistributions in binary form must reproduce the above copyright
! 21: * notice, this list of conditions and the following disclaimer in the
! 22: * documentation and/or other materials provided with the distribution.
! 23: * 3. Neither the name of the University nor the names of its contributors
! 24: * may be used to endorse or promote products derived from this software
! 25: * without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 37: * SUCH DAMAGE.
! 38: *
! 39: * @(#)pmap.h 7.6 (Berkeley) 5/10/91
! 40: */
! 41:
! 42:
! 43: #ifndef PMAP_H
! 44: #define PMAP_H
! 45:
! 46: #include <machine/pte.h>
! 47: #include <machine/mtpr.h>
! 48: #include <machine/pcb.h>
! 49:
! 50: /*
! 51: * Some constants to make life easier.
! 52: */
! 53: #define LTOHPS (PGSHIFT - VAX_PGSHIFT)
! 54: #define LTOHPN (1 << LTOHPS)
! 55: #define USRPTSIZE ((MAXTSIZ + 40*1024*1024 + MAXSSIZ) / VAX_NBPG)
! 56: #define NPTEPGS (USRPTSIZE / (sizeof(pt_entry_t) * LTOHPN))
! 57:
! 58: /*
! 59: * Pmap structure
! 60: * pm_stack holds lowest allocated memory for the process stack.
! 61: */
! 62:
! 63: typedef struct pmap {
! 64: vaddr_t pm_stack; /* Base of alloced p1 pte space */
! 65: int ref_count; /* reference count */
! 66: pt_entry_t *pm_p0br; /* page 0 base register */
! 67: long pm_p0lr; /* page 0 length register */
! 68: pt_entry_t *pm_p1br; /* page 1 base register */
! 69: long pm_p1lr; /* page 1 length register */
! 70: int pm_lock; /* Lock entry in MP environment */
! 71: struct pmap_statistics pm_stats; /* Some statistics */
! 72: u_char pm_refcnt[NPTEPGS]; /* Refcount per pte page */
! 73: } *pmap_t;
! 74:
! 75: /*
! 76: * For each vm_page_t, there is a list of all currently valid virtual
! 77: * mappings of that page. An entry is a pv_entry_t.
! 78: */
! 79:
! 80: struct pv_entry {
! 81: struct pv_entry *pv_next; /* next pv_entry */
! 82: pt_entry_t *pv_pte; /* pte for this physical page */
! 83: struct pmap *pv_pmap; /* pmap this entry belongs to */
! 84: };
! 85:
! 86: /* ROUND_PAGE used before vm system is initialized */
! 87: #define ROUND_PAGE(x) (((uint)(x) + PGOFSET) & ~PGOFSET)
! 88: #define TRUNC_PAGE(x) ((uint)(x) & ~PGOFSET)
! 89:
! 90: /* Mapping macros used when allocating SPT */
! 91: #define MAPVIRT(ptr, count) \
! 92: (vaddr_t)ptr = virtual_avail; \
! 93: virtual_avail += (count) * VAX_NBPG;
! 94:
! 95: #define MAPPHYS(ptr, count, perm) \
! 96: (paddr_t)ptr = avail_start + KERNBASE; \
! 97: avail_start += (count) * VAX_NBPG;
! 98:
! 99: #ifdef _KERNEL
! 100:
! 101: extern struct pmap kernel_pmap_store;
! 102:
! 103: #define pmap_kernel() (&kernel_pmap_store)
! 104:
! 105: /*
! 106: * Real nice (fast) routines to get the virtual address of a physical page
! 107: * (and vice versa).
! 108: */
! 109: #define pmap_map_direct(pg) (VM_PAGE_TO_PHYS(pg) | KERNBASE)
! 110: #define pmap_unmap_direct(va) PHYS_TO_VM_PAGE((va) & ~KERNBASE)
! 111: #define __HAVE_PMAP_DIRECT
! 112:
! 113: #define PMAP_STEAL_MEMORY
! 114:
! 115: /*
! 116: * This is the by far most used pmap routine. Make it inline.
! 117: */
! 118:
! 119: /* Routines that are best to define as macros */
! 120: #define pmap_phys_address(phys) ((u_int)(phys) << PGSHIFT)
! 121: #define pmap_copy(a,b,c,d,e) /* Dont do anything */
! 122: #define pmap_update(pm) /* nothing */
! 123: #define pmap_collect(pmap) /* No need so far */
! 124: #define pmap_remove(pmap, start, slut) pmap_protect(pmap, start, slut, 0)
! 125: #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
! 126: #define pmap_deactivate(p) /* Dont do anything */
! 127: #define pmap_reference(pmap) (pmap)->ref_count++
! 128:
! 129: /* These can be done as efficient inline macros */
! 130: #define pmap_copy_page(srcpg, dstpg) do { \
! 131: paddr_t __src = VM_PAGE_TO_PHYS(srcpg); \
! 132: paddr_t __dst = VM_PAGE_TO_PHYS(dstpg); \
! 133: __asm__("addl3 $0x80000000,%0,r0;addl3 $0x80000000,%1,r1; \
! 134: movc3 $4096,(r0),(r1)" \
! 135: :: "r"(__src),"r"(__dst):"r0","r1","r2","r3","r4","r5"); \
! 136: } while (0)
! 137:
! 138: #define pmap_zero_page(pg) do { \
! 139: paddr_t __pa = VM_PAGE_TO_PHYS(pg); \
! 140: __asm__("addl3 $0x80000000,%0,r0;movc5 $0,(r0),$0,$4096,(r0)" \
! 141: :: "r"(__pa): "r0","r1","r2","r3","r4","r5"); \
! 142: } while (0)
! 143:
! 144: #define pmap_proc_iflush(p,va,len) /* nothing */
! 145: #define pmap_unuse_final(p) /* nothing */
! 146:
! 147: /* Prototypes */
! 148: void pmap_bootstrap(void);
! 149: vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
! 150: void pmap_pinit(pmap_t);
! 151:
! 152: #endif /* _KERNEL */
! 153:
! 154: #endif /* PMAP_H */
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