/* $NetBSD: pmap.h,v 1.19 1998/01/03 01:13:06 thorpej Exp $ */ /* * Copyright (c) 1987 Carnegie-Mellon University * Copyright (c) 1991 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. */ /*- * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, * Michael L. Finch, Bradley A. Grantham, and * Lawrence A. Kesteloot * All rights reserved. * * 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 Alice Group. * 4. The names of the Alice Group or any of its members may not be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``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 ALICE GROUP 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 7.6 (Berkeley) 5/10/91 */ #ifndef _PMAP_MACHINE_ #define _PMAP_MACHINE_ #include #include #if defined(M68040) #define MAC_SEG_SIZE (mmutype == MMU_68040 ? 0x40000 : NBSEG) #else #define MAC_SEG_SIZE NBSEG #endif #define mac68k_trunc_seg(x) (((unsigned)(x)) & ~(MAC_SEG_SIZE-1)) #define mac68k_round_seg(x) mac68k_trunc_seg((unsigned)(x)+MAC_SEG_SIZE-1) /* * Pmap stuff */ struct pmap { pt_entry_t *pm_ptab; /* KVA of page table */ st_entry_t *pm_stab; /* KVA of segment table */ int pm_stchanged; /* ST changed */ int pm_stfree; /* 040: free lev2 blocks */ st_entry_t *pm_stpa; /* 040: ST phys addr */ 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; /* * On the 040, we keep track of which level 2 blocks are already in use * with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB * (block 31). For convenience, the level 1 table is considered to be * block 0. * * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed * for the kernel and users. 8 implies only the initial "segment table" * page is used. WARNING: don't change MAXUL2SIZE unless you can allocate * physically contiguous pages for the ST in pmap.c! */ #define MAXKL2SIZE 32 #define MAXUL2SIZE 8 #define l2tobm(n) (1 << (n)) #define bmtol2(n) (ffs(n) - 1) /* * Macros for speed */ #define PMAP_ACTIVATE(pmap, pcb, loadhw) \ { \ (pcb)->pcb_ustp = m68k_btop((vm_offset_t)(pmap)->pm_stpa); \ if ((loadhw)) \ loadustp((pcb)->pcb_ustp); \ (pmap)->pm_stchanged = FALSE; \ } /* * 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 */ st_entry_t *pv_ptste; /* non-zero if VA maps a PT page */ struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ int pv_flags; /* flags */ } *pv_entry_t; #define PV_CI 0x01 /* all entries must be cache inhibited */ #define PV_PTPAGE 0x02 /* entry maps a page table page */ struct pv_page; struct pv_page_info { TAILQ_ENTRY(pv_page) pgi_list; struct pv_entry *pgi_freelist; int pgi_nfree; }; /* * This is basically: * ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry)) */ #define NPVPPG 170 struct pv_page { struct pv_page_info pvp_pgi; struct pv_entry pvp_pv[NPVPPG]; }; #ifdef _KERNEL struct pmap kernel_pmap_store; #define pmap_kernel() (&kernel_pmap_store) #define active_pmap(pm) \ ((pm) == pmap_kernel() || (pm) == curproc->p_vmspace->vm_map.pmap) #define active_user_pmap(pm) \ (curproc && \ (pm) != pmap_kernel() && (pm) == curproc->p_vmspace->vm_map.pmap) extern struct pv_entry *pv_table; /* array of entries, one per page */ #define pa_to_pvh(pa) (&pv_table[pmap_page_index(pa)]) #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. */ __BEGIN_DECLS /* pmap.c */ void mac68k_set_pte __P((vm_offset_t va, vm_offset_t pge)); void pmap_remove_mapping __P((pmap_t, vm_offset_t, pt_entry_t *, int)); boolean_t pmap_testbit __P((vm_offset_t, int)); void pmap_changebit __P((vm_offset_t, int, boolean_t)); void pmap_enter_ptpage __P((pmap_t, vm_offset_t)); void pmap_pvdump __P((vm_offset_t)); void pmap_check_wiring __P((char *, vm_offset_t)); void pmap_collect_pv __P((void)); /* pmap_bootstrap.c */ void pmap_bootstrap __P((vm_offset_t, register vm_offset_t)); void bootstrap_mac68k __P((int)); /* locore.s */ void loadustp __P((vm_offset_t)); void TBIA __P((void)); void TBIS __P((vm_offset_t)); void DCFP __P((vm_offset_t)); void ICPP __P((vm_offset_t)); __END_DECLS #endif /* _KERNEL */ #endif /* _PMAP_MACHINE_ */