/* $NetBSD: pmap3.h,v 1.49.42.1 2020/01/21 15:41:43 martin Exp $ */ /*- * Copyright (c) 1996 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Adam Glass and Gordon W. Ross. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #ifdef _KERNEL /* * Physical map structures exported to the VM code. */ struct pmap { unsigned char *pm_segmap; /* soft copy of segmap */ int pm_ctxnum; /* MMU context number */ u_int pm_refcount; /* reference count */ int pm_version; }; /* * We give the pmap code a chance to resolve faults by * reloading translations that it was forced to unload. * This function does that, and calls vm_fault if it * could not resolve the fault by reloading the MMU. */ int _pmap_fault(struct vm_map *, vaddr_t, vm_prot_t); /* This lets us have some say in choosing VA locations. */ extern void pmap_prefer(vaddr_t, vaddr_t *, int); #define PMAP_PREFER(fo, ap, sz, td) pmap_prefer((fo), (ap), (td)) /* This needs to be a macro for kern_sysctl.c */ extern segsz_t pmap_resident_pages(pmap_t); #define pmap_resident_count(pmap) (pmap_resident_pages(pmap)) /* This needs to be a macro for vm_mmap.c */ extern segsz_t pmap_wired_pages(pmap_t); #define pmap_wired_count(pmap) (pmap_wired_pages(pmap)) /* We use the PA plus some low bits for device mmap. */ #define pmap_phys_address(addr) (addr) /* Map a given physical region to a virtual region */ extern vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int); static __inline void pmap_remove_all(struct pmap *pmap) { /* Nothing. */ } /* * Since PTEs also contain type bits, we have to have some way * to tell pmap_enter `this is an IO page' or `this is not to * be cached'. Since physical addresses are always aligned, we * can do this with the low order bits. * * The values below must agree with pte.h such that: * (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO */ #define PMAP_OBMEM 0x00 /* unused */ #define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */ #define PMAP_VME16 0x08 /* etc */ #define PMAP_VME32 0x0C /* etc */ #define PMAP_NC 0x10 /* tells pmap_enter to set PG_NC */ #define PMAP_SPEC 0x1C /* mask to get all above. */ #endif /* _KERNEL */ /* MMU specific segment size */ #define SEGSHIFT 17 /* LOG2(NBSG) */ #define NBSG (1 << SEGSHIFT) /* bytes/segment */ #define SEGOFSET (NBSG - 1) /* byte offset into segment */ #define sun3_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET) #define sun3_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) #define sun3_seg_offset(x) ((vaddr_t)(x) & SEGOFSET)