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Diffstat (limited to 'sys/alpha/include/pmap.h')
| -rw-r--r-- | sys/alpha/include/pmap.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/sys/alpha/include/pmap.h b/sys/alpha/include/pmap.h new file mode 100644 index 0000000..9f013ac --- /dev/null +++ b/sys/alpha/include/pmap.h @@ -0,0 +1,140 @@ +/* $Id$ */ +/* From: NetBSD: pmap.old.h,v 1.16 1998/01/09 19:13:09 thorpej Exp */ + +/* + * Copyright (c) 1987 Carnegie-Mellon University + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * the Systems Programming Group of the University of Utah Computer + * Science Department. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)pmap.h 8.1 (Berkeley) 6/10/93 + */ + +#ifndef _PMAP_MACHINE_ +#define _PMAP_MACHINE_ + +#include <machine/pte.h> +#include <machine/lock.h> + +extern vm_offset_t vtophys(vm_offset_t); + +#define ALPHA_PAGE_SIZE NBPG +#define ALPHA_SEG_SIZE NBSEG + +#define alpha_trunc_seg(x) (((u_long)(x)) & ~(ALPHA_SEG_SIZE-1)) +#define alpha_round_seg(x) alpha_trunc_seg((u_long)(x) + ALPHA_SEG_SIZE-1) + +typedef struct simplelock simple_lock_data_t; + +/* + * Pmap stuff + */ +struct pmap { + pt_entry_t *pm_ptab; /* KVA of page table */ + pt_entry_t *pm_stab; /* KVA of segment table */ + pt_entry_t pm_stpte; /* PTE mapping STE */ + short pm_sref; /* segment table ref count */ + short pm_count; /* pmap reference count */ + simple_lock_data_t pm_lock; /* lock on pmap */ + struct pmap_statistics pm_stats; /* pmap statistics */ + long pm_ptpages; /* more stats: PT pages */ +}; + +typedef struct pmap *pmap_t; + +extern struct pmap kernel_pmap_store; + +#define pmap_kernel() (&kernel_pmap_store) +#define active_pmap(pm) \ + ((pm) == pmap_kernel() \ + || curproc == NULL \ + || (pm) == curproc->p_vmspace->vm_map.pmap) +#define active_user_pmap(pm) \ + (curproc && \ + (pm) != pmap_kernel() && (pm) == curproc->p_vmspace->vm_map.pmap) + +/* + * For each vm_page_t, there is a list of all currently valid virtual + * mappings of that page. An entry is a pv_entry_t, the list is pv_table. + */ +typedef struct pv_entry { + struct pv_entry *pv_next; /* next pv_entry */ + struct pmap *pv_pmap; /* pmap where mapping lies */ + vm_offset_t pv_va; /* virtual address for mapping */ + pt_entry_t *pv_ptpte; /* non-zero if VA maps a PT page */ + struct pmap *pv_ptpmap; /* if pv_ptpte, pmap for PT page */ + int pv_flags; /* flags */ +} *pv_entry_t; + +#define PV_PTPAGE 0x01 /* header: entry maps a page table page */ + +struct pv_page_info { + TAILQ_ENTRY(pv_page) pgi_list; + struct pv_entry *pgi_freelist; + int pgi_nfree; +}; + +#define NPVPPG ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry)) + +struct pv_page { + struct pv_page_info pvp_pgi; + struct pv_entry pvp_pv[NPVPPG]; +}; + +/* + * Physical page attributes. + */ +typedef int pmap_attr_t; +#define PMAP_ATTR_MOD 0x01 /* modified */ +#define PMAP_ATTR_REF 0x02 /* referenced */ + +#ifdef _KERNEL +#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) +#define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) + +extern pt_entry_t *Sysmap; +extern char *vmmap; /* map for mem, dumps, etc. */ + +#if defined(MACHINE_NEW_NONCONTIG) +#define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */ +#endif + +/* Machine-specific functions. */ +void pmap_bootstrap __P((vm_offset_t firstaddr, vm_offset_t ptaddr)); +void pmap_emulate_reference __P((struct proc *p, vm_offset_t v, + int user, int write)); +void pmap_unmap_prom __P((void)); +#endif /* _KERNEL */ + +#endif /* _PMAP_MACHINE_ */ |
