1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
/* $OpenBSD: mmu.h,v 1.17 2002/03/14 01:26:39 millert Exp $ */
/*
* This file bears almost no resemblance to the original m68k file,
* so the following copyright notice is questionable, but we are
* nice people.
*/
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 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. 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.
*
* from: Utah $Hdr: pte.h 1.13 92/01/20$
*
* @(#)pte.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _MACHINE_MMU_H_
#define _MACHINE_MMU_H_
/*
* Parameters which determine the 'geometry' of the m88K page tables in memory.
*/
#define SDT_BITS 10 /* M88K segment table size bits */
#define PDT_BITS 10 /* M88K page table size bits */
#define PG_BITS PAGE_SHIFT /* M88K hardware page size bits */
/*
* Common fields for APR, SDT and PTE
*/
/* address frame */
#define PG_FRAME 0xfffff000
#define PG_SHIFT PG_BITS
#define PG_PFNUM(x) (((x) & PG_FRAME) >> PG_SHIFT)
/* cache control bits */
#define CACHE_DFL 0x0000000
#define CACHE_INH 0x0000040 /* cache inhibit */
#define CACHE_GLOBAL 0x0000080 /* global scope */
#define CACHE_WT 0x0000200 /* write through */
#define CACHE_MASK (~(CACHE_INH | CACHE_GLOBAL | CACHE_WT))
/*
* Area descriptors
*/
typedef struct cmmu_apr {
unsigned long
st_base:20, /* segment table base address */
rsvA:2, /* reserved */
wt:1, /* writethrough (cache control) */
rsvB:1, /* reserved */
g:1, /* global (cache control) */
ci:1, /* cache inhibit */
rsvC:5, /* reserved */
te:1; /* translation enable */
} cmmu_apr_t;
typedef union apr_template {
cmmu_apr_t field;
unsigned long bits;
} apr_template_t;
/*
* 88200 PATC (TLB)
*/
#define PATC_ENTRIES 56
/*
* BATC entries
*/
typedef struct {
unsigned long
lba:13, /* logical block address */
pba:13, /* physical block address */
sup:1, /* supervisor mode bit */
wt:1, /* writethrough (cache control) */
g:1, /* global (cache control) */
ci:1, /* cache inhibit */
wp:1, /* write protect */
v:1; /* valid */
} batc_entry_t;
typedef union batc_template {
batc_entry_t field;
unsigned long bits;
} batc_template_t;
/*
* Segment table entries
*/
typedef u_int32_t sdt_entry_t;
#define SDT_ENTRY_NULL ((sdt_entry_t *) 0)
#define SG_V 0x00000001
#define SG_NV 0x00000000
#define SG_PROT 0x00000004
#define SG_RO 0x00000004
#define SG_RW 0x00000000
#define SG_SO 0x00000100
#define SDT_VALID(sdt) (*(sdt) & SG_V)
#define SDT_SUP(sdt) (*(sdt) & SG_SO)
#define SDT_WP(sdt) (*(sdt) & SG_PROT)
/*
* Page table entries
*/
typedef u_int32_t pt_entry_t;
#define PT_ENTRY_NULL ((pt_entry_t *) 0)
#define PG_V 0x00000001
#define PG_NV 0x00000000
#define PG_PROT 0x00000004
#define PG_U 0x00000008
#define PG_M 0x00000010
#define PG_RO 0x00000004
#define PG_RW 0x00000000
#define PG_SO 0x00000100
#define PG_W 0x00000400 /* XXX unused but reserved field */
#define PG_U1 0x00000800 /* U1 bit for M88110 */
#define PDT_VALID(pte) (*(pte) & PG_V)
#define PDT_SUP(pte) (*(pte) & PG_SO)
#define PDT_WP(pte) (*(pte) & PG_PROT)
/*
* Indirect descriptors (mc81110)
*/
typedef u_int32_t pt_ind_entry_t;
/* validity bits */
#define IND_V 0x00000001
#define IND_NV 0x00000000
#define IND_MASKED 0x00000002
#define IND_UNMASKED 0x00000003
#define IND_MASK 0x00000003
#define IND_FRAME 0xfffffffc
#define IND_SHIFT 2
#define IND_PDA(x) ((x) & IND_FRAME >> IND_SHIFT)
/*
* Number of entries in a page table.
*/
#define SDT_ENTRIES (1<<(SDT_BITS))
#define PDT_ENTRIES (1<<(PDT_BITS))
/*
* Size in bytes of a single page table.
*/
#define SDT_SIZE (sizeof(sdt_entry_t) * SDT_ENTRIES)
#define PDT_SIZE (sizeof(pt_entry_t) * PDT_ENTRIES)
/*
* Shifts and masks
*/
#define SDT_SHIFT (PDT_BITS + PG_BITS)
#define PDT_SHIFT (PG_BITS)
#define SDT_MASK (((1<<SDT_BITS)-1) << SDT_SHIFT)
#define PDT_MASK (((1<<PDT_BITS)-1) << PDT_SHIFT)
#define SDT_NEXT(va) (((va) + (1<<SDT_SHIFT)) & SDT_MASK)
#define PDT_NEXT(va) (((va) + (1<<PDT_SHIFT)) & (SDT_MASK|PDT_MASK))
#define SDTIDX(va) (((va) & SDT_MASK) >> SDT_SHIFT)
#define PDTIDX(va) (((va) & PDT_MASK) >> PDT_SHIFT)
/* XXX uses knowledge of pmap structure */
#define SDTENT(map, va) ((sdt_entry_t *)((map)->sdt_vaddr + SDTIDX(va)))
/*
* Size of a PDT table group.
*/
#define LOG2_PDT_SIZE (PDT_BITS + 2)
#define LOG2_PDT_TABLE_GROUP_SIZE (PAGE_SHIFT - LOG2_PDT_SIZE)
#define PDT_TABLE_GROUP_SIZE (1 << LOG2_PDT_TABLE_GROUP_SIZE)
#define PT_FREE(tbl) uvm_km_free(kernel_map, (vaddr_t)tbl, PAGE_SIZE)
/*
* Va spaces mapped by tables and PDT table group.
*/
#define PDT_VA_SPACE (PDT_ENTRIES * PAGE_SIZE)
#define PDT_TABLE_GROUP_VA_SPACE (PDT_VA_SPACE * PDT_TABLE_GROUP_SIZE)
/*
* Number of sdt entries used to map user and kernel space.
*/
#define USER_SDT_ENTRIES SDTIDX(VM_MIN_KERNEL_ADDRESS)
#define KERNEL_SDT_ENTRIES (SDT_ENTRIES - USER_SDT_ENTRIES)
/*
* Parameters and macros for BATC
*/
/* number of bits to BATC shift (log2(BATC_BLKBYTES)) */
#define BATC_BLKSHIFT 19
/* 'block' size of a BATC entry mapping */
#define BATC_BLKBYTES (1 << BATC_BLKSHIFT)
/* BATC block mask */
#define BATC_BLKMASK (BATC_BLKBYTES-1)
/* number of BATC entries */
#define BATC_MAX 8
#define BATC_BLK_ALIGNED(x) ((x & BATC_BLKMASK) == 0)
#define M88K_BTOBLK(x) (x >> BATC_BLKSHIFT)
/*
* DMA and caching control
*/
#define DMA_CACHE_SYNC 0x1
#define DMA_CACHE_SYNC_INVAL 0x2
#define DMA_CACHE_INV 0x3
void dma_cachectl(vm_offset_t, int, int);
/*
* Alignment checks for pages (must lie on page boundaries).
*/
#define PAGE_ALIGNED(ad) (((vm_offset_t)(ad) & PAGE_MASK) == 0)
#define CHECK_PAGE_ALIGN(ad,who) \
if (!PAGE_ALIGNED(ad)) \
printf("%s: addr %x not page aligned.\n", who, ad)
unsigned invalidate_pte(pt_entry_t *);
extern vm_offset_t kmapva;
#define kvtopte(va) \
((pt_entry_t *)(PG_PFNUM(*((sdt_entry_t *)kmapva + \
SDTIDX(va) + SDT_ENTRIES)) << PDT_SHIFT) + PDTIDX(va))
u_int kvtop(vm_offset_t);
#endif /* __MACHINE_MMU_H__ */
|
