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
pmap_remove_all(struct pmap * pmap)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