/* $NetBSD: pmap_motorola.h,v 1.34 2011/10/29 18:26:19 tsutsui Exp $ */ /* * 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. 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 */ /* * Copyright (c) 1987 Carnegie-Mellon University * * 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 _M68K_PMAP_MOTOROLA_H_ #define _M68K_PMAP_MOTOROLA_H_ #ifdef _KERNEL_OPT #include "opt_m68k_arch.h" #endif #include #include /* * Pmap stuff */ struct pmap { pt_entry_t *pm_ptab; /* KVA of page table */ st_entry_t *pm_stab; /* KVA of segment table */ u_int pm_stfree; /* 040: free lev2 blocks */ st_entry_t *pm_stpa; /* 040: ST phys addr */ uint16_t pm_sref; /* segment table ref count */ u_int pm_count; /* pmap reference count */ struct pmap_statistics pm_stats; /* pmap statistics */ int pm_ptpages; /* more stats: PT pages */ }; /* * MMU specific segment values * * We are using following segment layout in m68k pmap_motorola.c: * 68020/030 4KB/page: l1,l2,page == 10,10,12 (%tc = 0x82c0aa00) * 68020/030 8KB/page: l1,l2,page == 8,11,13 (%tc = 0x82d08b00) * 68040/060 4KB/page: l1,l2,l3,page == 7,7,6,12 (%tc = 0x8000) * 68040/060 8KB/page: l1,l2,l3,page == 7,7,5,13 (%tc = 0xc000) * * 68020/030 l2 size is chosen per NPTEPG, a number of page table entries * per page, to use one whole page for PTEs per one segment table entry, * and maybe also because 68020 HP MMU machines use simlar structures. * * 68040/060 layout is defined by hardware design and not configurable, * as defined in . * * Even on 68040/060, we still appropriate 2-level ste-pte pmap structures * for 68020/030 (derived from 4.4BSD/hp300) to handle 040's 3-level MMU. * TIA_SIZE and TIB_SIZE are used to represent such pmap structures and * they are also refered on 040/060. * * NBSEG and SEGOFSET are used to check l2 STE of the specified VA, * so they have different values between 020/030 and 040/060. */ /* 8KB / 4KB */ #define TIB_SHIFT (PG_SHIFT - 2) /* 11 / 10 */ #define TIB_SIZE (1U << TIB_SHIFT) /* 2048 / 1024 */ #define TIA_SHIFT (32 - TIB_SHIFT - PG_SHIFT) /* 8 / 10 */ #define TIA_SIZE (1U << TIA_SHIFT) /* 256 / 1024 */ #define SEGSHIFT (TIB_SHIFT + PG_SHIFT) /* 24 / 22 */ #define NBSEG30 (1U << SEGSHIFT) #define NBSEG40 (1U << SG4_SHIFT2) #if ( defined(M68020) || defined(M68030)) && \ (!defined(M68040) && !defined(M68060)) #define NBSEG NBSEG30 #elif ( defined(M68040) || defined(M68060)) && \ (!defined(M68020) && !defined(M68030)) #define NBSEG NBSEG40 #else #define NBSEG ((mmutype == MMU_68040) ? NBSEG40 : NBSEG30) #endif #define SEGOFSET (NBSEG - 1) /* byte offset into segment */ #define m68k_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET) #define m68k_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) #define m68k_seg_offset(x) ((vaddr_t)(x) & SEGOFSET) /* * 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. * 16 or 8 implies only the initial "segment table" page is used, * i.e. it means PAGE_SIZE / (SG4_LEV1SIZE * sizeof(st_entry_t)). * WARNING: don't change MAXUL2SIZE unless you can allocate * physically contiguous pages for the ST in pmap_motorola.c! */ #define MAXKL2SIZE 32 #if PAGE_SIZE == 8192 /* NBPG / (SG4_LEV1SIZE * sizeof(st_entry_t)) */ #define MAXUL2SIZE 16 #else #define MAXUL2SIZE 8 #endif #define l2tobm(n) (1U << (n)) #define bmtol2(n) (ffs(n) - 1) /* * Macros for speed */ #define PMAP_ACTIVATE(pmap, loadhw) \ { \ if ((loadhw)) \ loadustp(m68k_btop((paddr_t)(pmap)->pm_stpa)); \ } /* * For each struct vm_page, there is a list of all currently valid virtual * mappings of that page. An entry is a pv_entry, the list is pv_table. */ struct pv_entry { struct pv_entry *pv_next; /* next pv_entry */ struct pmap *pv_pmap; /* pmap where mapping lies */ vaddr_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 */ }; #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_header *pv_table; /* array of entries, one per page */ #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) #define pmap_update(pmap) /* nothing (yet) */ static __inline void pmap_remove_all(struct pmap *pmap) { /* Nothing. */ } extern paddr_t Sysseg_pa; extern st_entry_t *Sysseg; extern pt_entry_t *Sysmap, *Sysptmap; #define SYSMAP_VA VM_MAX_KERNEL_ADDRESS extern vsize_t Sysptsize; extern vsize_t mem_size; extern vaddr_t virtual_avail, virtual_end; extern u_int protection_codes[]; #if defined(M68040) || defined(M68060) extern u_int protostfree; #endif #ifdef CACHE_HAVE_VAC extern u_int pmap_aliasmask; #endif extern char *vmmap; /* map for mem, dumps, etc. */ extern void *CADDR1, *CADDR2; extern void *msgbufaddr; /* for lwp0 uarea initialization after MMU enabled */ extern vaddr_t lwp0uarea; void pmap_bootstrap_finalize(void); vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int); void pmap_procwr(struct proc *, vaddr_t, size_t); #define PMAP_NEED_PROCWR #ifdef CACHE_HAVE_VAC void pmap_prefer(vaddr_t, vaddr_t *); #define PMAP_PREFER(foff, vap, sz, td) pmap_prefer((foff), (vap)) #endif void _pmap_set_page_cacheable(struct pmap *, vaddr_t); void _pmap_set_page_cacheinhibit(struct pmap *, vaddr_t); int _pmap_page_is_cacheable(struct pmap *, vaddr_t); #endif /* !_M68K_PMAP_MOTOROLA_H_ */