1 /* $NetBSD: pmap3.h,v 1.51 2020/03/14 14:05:44 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass and Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifdef _KERNEL 33 /* 34 * Physical map structures exported to the VM code. 35 */ 36 37 struct pmap { 38 unsigned char *pm_segmap; /* soft copy of segmap */ 39 int pm_ctxnum; /* MMU context number */ 40 u_int pm_refcount; /* reference count */ 41 int pm_version; 42 }; 43 44 /* 45 * We give the pmap code a chance to resolve faults by 46 * reloading translations that it was forced to unload. 47 * This function does that, and calls vm_fault if it 48 * could not resolve the fault by reloading the MMU. 49 */ 50 int _pmap_fault(struct vm_map *, vaddr_t, vm_prot_t); 51 52 /* This lets us have some say in choosing VA locations. */ 53 extern void pmap_prefer(vaddr_t, vaddr_t *, int); 54 #define PMAP_PREFER(fo, ap, sz, td) pmap_prefer((fo), (ap), (td)) 55 56 /* This needs to be a macro for kern_sysctl.c */ 57 extern segsz_t pmap_resident_pages(pmap_t); 58 #define pmap_resident_count(pmap) (pmap_resident_pages(pmap)) 59 60 /* This needs to be a macro for vm_mmap.c */ 61 extern segsz_t pmap_wired_pages(pmap_t); 62 #define pmap_wired_count(pmap) (pmap_wired_pages(pmap)) 63 64 /* We use the PA plus some low bits for device mmap. */ 65 #define pmap_phys_address(addr) (addr) 66 67 /* Map a given physical region to a virtual region */ 68 extern vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int); 69 70 static __inline bool 71 pmap_remove_all(struct pmap *pmap) 72 { 73 /* Nothing. */ 74 return false; 75 } 76 77 /* 78 * Since PTEs also contain type bits, we have to have some way 79 * to tell pmap_enter `this is an IO page' or `this is not to 80 * be cached'. Since physical addresses are always aligned, we 81 * can do this with the low order bits. 82 * 83 * The values below must agree with pte.h such that: 84 * (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO 85 */ 86 #define PMAP_OBMEM 0x00 /* unused */ 87 #define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */ 88 #define PMAP_VME16 0x08 /* etc */ 89 #define PMAP_VME32 0x0C /* etc */ 90 #define PMAP_NC 0x10 /* tells pmap_enter to set PG_NC */ 91 #define PMAP_SPEC 0x1C /* mask to get all above. */ 92 93 #endif /* _KERNEL */ 94 95 /* MMU specific segment size */ 96 #define SEGSHIFT 17 /* LOG2(NBSG) */ 97 #define NBSG (1 << SEGSHIFT) /* bytes/segment */ 98 #define SEGOFSET (NBSG - 1) /* byte offset into segment */ 99 100 #define sun3_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET) 101 #define sun3_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) 102 #define sun3_seg_offset(x) ((vaddr_t)(x) & SEGOFSET) 103