1 /* $NetBSD: pmap3x.h,v 1.32 2024/12/20 23:50:00 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jeremy Cooper. 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 struct a_tmgr_struct *pm_a_tmgr; /* Level-A table manager */ 39 paddr_t pm_a_phys; /* MMU level-A phys addr */ 40 u_int pm_refcount; /* reference count */ 41 int pm_version; 42 }; 43 44 /* Common function for pmap_resident_count(), pmap_wired_count() */ 45 segsz_t pmap_count(pmap_t, int); 46 47 /* This needs to be a macro for kern_sysctl.c */ 48 #define pmap_resident_count(pmap) (pmap_count((pmap), 0)) 49 50 /* This needs to be a macro for vm_mmap.c */ 51 #define pmap_wired_count(pmap) (pmap_count((pmap), 1)) 52 53 /* We use the PA plus some low bits for device mmap. */ 54 #define pmap_phys_address(addr) (addr) 55 56 /* Map a given physical region to a virtual region */ 57 vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int); 58 59 static __inline bool 60 pmap_remove_all(struct pmap *pmap) 61 { 62 /* Nothing. */ 63 return false; 64 } 65 66 /* 67 * Flags to tell pmap_enter `this is not to be cached', etc. 68 * Since physical addresses are always aligned, we can use 69 * the low order bits for this. 70 */ 71 #define PMAP_OBMEM 0x00 /* unused */ 72 #define PMAP_OBIO 0x00 /* unused */ 73 #define PMAP_VME16 0x10 /* pmap will add the necessary offset */ 74 #define PMAP_VME32 0x20 /* etc. */ 75 #define PMAP_NC 0x40 /* tells pmap_enter to set PTE_CI */ 76 #define PMAP_SPEC 0xFF /* mask to get all above. */ 77 78 #endif /* _KERNEL */ 79 80 /* MMU specific segment size */ 81 #define SEGSHIFT 19 /* LOG2(NBSG) */ 82 #define NBSG (1 << SEGSHIFT) /* bytes/segment */ 83 #define SEGOFSET (NBSG - 1) /* byte offset into segment */ 84 85 #define sun3x_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET) 86 #define sun3x_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) 87 #define sun3x_seg_offset(x) ((vaddr_t)(x) & SEGOFSET) 88