aboutsummaryrefslogtreecommitdiff
path: root/include/asm-ppc/mmu.h
blob: 8915c4c3ecb319b68580523e1bd43a2648854d7a (plain)
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
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
/*
 * PowerPC memory management structures
 */

#ifdef __KERNEL__
#ifndef _PPC_MMU_H_
#define _PPC_MMU_H_

#include <linux/config.h>

#ifndef __ASSEMBLY__

/*
 * Define physical address type.  Machines using split size
 * virtual/physical addressing like 32-bit virtual / 36-bit
 * physical need a larger than native word size type. -Matt
 */
#ifndef CONFIG_PHYS_64BIT
typedef unsigned long phys_addr_t;
#define PHYS_FMT	"%.8lx"
#else
typedef unsigned long long phys_addr_t;
extern phys_addr_t fixup_bigphys_addr(phys_addr_t, phys_addr_t);
#define PHYS_FMT	"%16Lx"
#endif

typedef struct {
	unsigned long id;
	unsigned long vdso_base;
} mm_context_t;

/* Hardware Page Table Entry */
typedef struct _PTE {
	unsigned long v:1;	/* Entry is valid */
	unsigned long vsid:24;	/* Virtual segment identifier */
	unsigned long h:1;	/* Hash algorithm indicator */
	unsigned long api:6;	/* Abbreviated page index */
	unsigned long rpn:20;	/* Real (physical) page number */
	unsigned long    :3;	/* Unused */
	unsigned long r:1;	/* Referenced */
	unsigned long c:1;	/* Changed */
	unsigned long w:1;	/* Write-thru cache mode */
	unsigned long i:1;	/* Cache inhibited */
	unsigned long m:1;	/* Memory coherence */
	unsigned long g:1;	/* Guarded */
	unsigned long  :1;	/* Unused */
	unsigned long pp:2;	/* Page protection */
} PTE;

/* Values for PP (assumes Ks=0, Kp=1) */
#define PP_RWXX	0	/* Supervisor read/write, User none */
#define PP_RWRX 1	/* Supervisor read/write, User read */
#define PP_RWRW 2	/* Supervisor read/write, User read/write */
#define PP_RXRX 3	/* Supervisor read,       User read */

/* Segment Register */
typedef struct _SEGREG {
	unsigned long t:1;	/* Normal or I/O  type */
	unsigned long ks:1;	/* Supervisor 'key' (normally 0) */
	unsigned long kp:1;	/* User 'key' (normally 1) */
	unsigned long n:1;	/* No-execute */
	unsigned long :4;	/* Unused */
	unsigned long vsid:24;	/* Virtual Segment Identifier */
} SEGREG;

/* Block Address Translation (BAT) Registers */
typedef struct _P601_BATU {	/* Upper part of BAT for 601 processor */
	unsigned long bepi:15;	/* Effective page index (virtual address) */
	unsigned long :8;	/* unused */
	unsigned long w:1;
	unsigned long i:1;	/* Cache inhibit */
	unsigned long m:1;	/* Memory coherence */
	unsigned long ks:1;	/* Supervisor key (normally 0) */
	unsigned long kp:1;	/* User key (normally 1) */
	unsigned long pp:2;	/* Page access protections */
} P601_BATU;

typedef struct _BATU {		/* Upper part of BAT (all except 601) */
	unsigned long bepi:15;	/* Effective page index (virtual address) */
	unsigned long :4;	/* Unused */
	unsigned long bl:11;	/* Block size mask */
	unsigned long vs:1;	/* Supervisor valid */
	unsigned long vp:1;	/* User valid */
} BATU;

typedef struct _P601_BATL {	/* Lower part of BAT for 601 processor */
	unsigned long brpn:15;	/* Real page index (physical address) */
	unsigned long :10;	/* Unused */
	unsigned long v:1;	/* Valid bit */
	unsigned long bl:6;	/* Block size mask */
} P601_BATL;

typedef struct _BATL {		/* Lower part of BAT (all except 601) */
	unsigned long brpn:15;	/* Real page index (physical address) */
	unsigned long :10;	/* Unused */
	unsigned long w:1;	/* Write-thru cache */
	unsigned long i:1;	/* Cache inhibit */
	unsigned long m:1;	/* Memory coherence */
	unsigned long g:1;	/* Guarded (MBZ in IBAT) */
	unsigned long :1;	/* Unused */
	unsigned long pp:2;	/* Page access protections */
} BATL;

typedef struct _BAT {
	BATU batu;		/* Upper register */
	BATL batl;		/* Lower register */
} BAT;

typedef struct _P601_BAT {
	P601_BATU batu;		/* Upper register */
	P601_BATL batl;		/* Lower register */
} P601_BAT;

#endif /* __ASSEMBLY__ */

/* Block size masks */
#define BL_128K	0x000
#define BL_256K 0x001
#define BL_512K 0x003
#define BL_1M   0x007
#define BL_2M   0x00F
#define BL_4M   0x01F
#define BL_8M   0x03F
#define BL_16M  0x07F
#define BL_32M  0x0FF
#define BL_64M  0x1FF
#define BL_128M 0x3FF
#define BL_256M 0x7FF

/* BAT Access Protection */
#define BPP_XX	0x00		/* No access */
#define BPP_RX	0x01		/* Read only */
#define BPP_RW	0x02		/* Read/write */

/* Control/status registers for the MPC8xx.
 * A write operation to these registers causes serialized access.
 * During software tablewalk, the registers used perform mask/shift-add
 * operations when written/read.  A TLB entry is created when the Mx_RPN
 * is written, and the contents of several registers are used to
 * create the entry.
 */
#define SPRN_MI_CTR	784	/* Instruction TLB control register */
#define MI_GPM		0x80000000	/* Set domain manager mode */
#define MI_PPM		0x40000000	/* Set subpage protection */
#define MI_CIDEF	0x20000000	/* Set cache inhibit when MMU dis */
#define MI_RSV4I	0x08000000	/* Reserve 4 TLB entries */
#define MI_PPCS		0x02000000	/* Use MI_RPN prob/priv state */
#define MI_IDXMASK	0x00001f00	/* TLB index to be loaded */
#define MI_RESETVAL	0x00000000	/* Value of register at reset */

/* These are the Ks and Kp from the PowerPC books.  For proper operation,
 * Ks = 0, Kp = 1.
 */
#define SPRN_MI_AP	786
#define MI_Ks		0x80000000	/* Should not be set */
#define MI_Kp		0x40000000	/* Should always be set */

/* The effective page number register.  When read, contains the information
 * about the last instruction TLB miss.  When MI_RPN is written, bits in
 * this register are used to create the TLB entry.
 */
#define SPRN_MI_EPN	787
#define MI_EPNMASK	0xfffff000	/* Effective page number for entry */
#define MI_EVALID	0x00000200	/* Entry is valid */
#define MI_ASIDMASK	0x0000000f	/* ASID match value */
					/* Reset value is undefined */

/* A "level 1" or "segment" or whatever you want to call it register.
 * For the instruction TLB, it contains bits that get loaded into the
 * TLB entry when the MI_RPN is written.
 */
#define SPRN_MI_TWC	789
#define MI_APG		0x000001e0	/* Access protection group (0) */
#define MI_GUARDED	0x00000010	/* Guarded storage */
#define MI_PSMASK	0x0000000c	/* Mask of page size bits */
#define MI_PS8MEG	0x0000000c	/* 8M page size */
#define MI_PS512K	0x00000004	/* 512K page size */
#define MI_PS4K_16K	0x00000000	/* 4K or 16K page size */
#define MI_SVALID	0x00000001	/* Segment entry is valid */
					/* Reset value is undefined */

/* Real page number.  Defined by the pte.  Writing this register
 * causes a TLB entry to be created for the instruction TLB, using
 * additional information from the MI_EPN, and MI_TWC registers.
 */
#define SPRN_MI_RPN	790

/* Define an RPN value for mapping kernel memory to large virtual
 * pages for boot initialization.  This has real page number of 0,
 * large page size, shared page, cache enabled, and valid.
 * Also mark all subpages valid and write access.
 */
#define MI_BOOTINIT	0x000001fd

#define SPRN_MD_CTR	792	/* Data TLB control register */
#define MD_GPM		0x80000000	/* Set domain manager mode */
#define MD_PPM		0x40000000	/* Set subpage protection */
#define MD_CIDEF	0x20000000	/* Set cache inhibit when MMU dis */
#define MD_WTDEF	0x10000000	/* Set writethrough when MMU dis */
#define MD_RSV4I	0x08000000	/* Reserve 4 TLB entries */
#define MD_TWAM		0x04000000	/* Use 4K page hardware assist */
#define MD_PPCS		0x02000000	/* Use MI_RPN prob/priv state */
#define MD_IDXMASK	0x00001f00	/* TLB index to be loaded */
#define MD_RESETVAL	0x04000000	/* Value of register at reset */

#define SPRN_M_CASID	793	/* Address space ID (context) to match */
#define MC_ASIDMASK	0x0000000f	/* Bits used for ASID value */


/* These are the Ks and Kp from the PowerPC books.  For proper operation,
 * Ks = 0, Kp = 1.
 */
#define SPRN_MD_AP	794
#define MD_Ks		0x80000000	/* Should not be set */
#define MD_Kp		0x40000000	/* Should always be set */

/* The effective page number register.  When read, contains the information
 * about the last instruction TLB miss.  When MD_RPN is written, bits in
 * this register are used to create the TLB entry.
 */
#define SPRN_MD_EPN	795
#define MD_EPNMASK	0xfffff000	/* Effective page number for entry */
#define MD_EVALID	0x00000200	/* Entry is valid */
#define MD_ASIDMASK	0x0000000f	/* ASID match value */
					/* Reset value is undefined */

/* The pointer to the base address of the first level page table.
 * During a software tablewalk, reading this register provides the address
 * of the entry associated with MD_EPN.
 */
#define SPRN_M_TWB	796
#define	M_L1TB		0xfffff000	/* Level 1 table base address */
#define M_L1INDX	0x00000ffc	/* Level 1 index, when read */
					/* Reset value is undefined */

/* A "level 1" or "segment" or whatever you want to call it register.
 * For the data TLB, it contains bits that get loaded into the TLB entry
 * when the MD_RPN is written.  It is also provides the hardware assist
 * for finding the PTE address during software tablewalk.
 */
#define SPRN_MD_TWC	797
#define MD_L2TB		0xfffff000	/* Level 2 table base address */
#define MD_L2INDX	0xfffffe00	/* Level 2 index (*pte), when read */
#define MD_APG		0x000001e0	/* Access protection group (0) */
#define MD_GUARDED	0x00000010	/* Guarded storage */
#define MD_PSMASK	0x0000000c	/* Mask of page size bits */
#define MD_PS8MEG	0x0000000c	/* 8M page size */
#define MD_PS512K	0x00000004	/* 512K page size */
#define MD_PS4K_16K	0x00000000	/* 4K or 16K page size */
#define MD_WT		0x00000002	/* Use writethrough page attribute */
#define MD_SVALID	0x00000001	/* Segment entry is valid */
					/* Reset value is undefined */


/* Real page number.  Defined by the pte.  Writing this register
 * causes a TLB entry to be created for the data TLB, using
 * additional information from the MD_EPN, and MD_TWC registers.
 */
#define SPRN_MD_RPN	798

/* This is a temporary storage register that could be used to save
 * a processor working register during a tablewalk.
 */
#define SPRN_M_TW	799

/*
 * At present, all PowerPC 400-class processors share a similar TLB
 * architecture. The instruction and data sides share a unified,
 * 64-entry, fully-associative TLB which is maintained totally under
 * software control. In addition, the instruction side has a
 * hardware-managed, 4-entry, fully- associative TLB which serves as a
 * first level to the shared TLB. These two TLBs are known as the UTLB
 * and ITLB, respectively.
 */

#define        PPC4XX_TLB_SIZE 64

/*
 * TLB entries are defined by a "high" tag portion and a "low" data
 * portion.  On all architectures, the data portion is 32-bits.
 *
 * TLB entries are managed entirely under software control by reading,
 * writing, and searchoing using the 4xx-specific tlbre, tlbwr, and tlbsx
 * instructions.
 */

#define	TLB_LO          1
#define	TLB_HI          0

#define	TLB_DATA        TLB_LO
#define	TLB_TAG         TLB_HI

/* Tag portion */

#define TLB_EPN_MASK    0xFFFFFC00      /* Effective Page Number */
#define TLB_PAGESZ_MASK 0x00000380
#define TLB_PAGESZ(x)   (((x) & 0x7) << 7)
#define   PAGESZ_1K		0
#define   PAGESZ_4K             1
#define   PAGESZ_16K            2
#define   PAGESZ_64K            3
#define   PAGESZ_256K           4
#define   PAGESZ_1M             5
#define   PAGESZ_4M             6
#define   PAGESZ_16M            7
#define TLB_VALID       0x00000040      /* Entry is valid */

/* Data portion */

#define TLB_RPN_MASK    0xFFFFFC00      /* Real Page Number */
#define TLB_PERM_MASK   0x00000300
#define TLB_EX          0x00000200      /* Instruction execution allowed */
#define TLB_WR          0x00000100      /* Writes permitted */
#define TLB_ZSEL_MASK   0x000000F0
#define TLB_ZSEL(x)     (((x) & 0xF) << 4)
#define TLB_ATTR_MASK   0x0000000F
#define TLB_W           0x00000008      /* Caching is write-through */
#define TLB_I           0x00000004      /* Caching is inhibited */
#define TLB_M           0x00000002      /* Memory is coherent */
#define TLB_G           0x00000001      /* Memory is guarded from prefetch */

/*
 * PPC440 support
 */
#define PPC44x_MMUCR_TID	0x000000ff
#define PPC44x_MMUCR_STS	0x00010000

#define	PPC44x_TLB_PAGEID	0
#define	PPC44x_TLB_XLAT		1
#define	PPC44x_TLB_ATTRIB	2

/* Page identification fields */
#define PPC44x_TLB_EPN_MASK	0xfffffc00      /* Effective Page Number */
#define	PPC44x_TLB_VALID	0x00000200      /* Valid flag */
#define PPC44x_TLB_TS		0x00000100	/* Translation address space */
#define PPC44x_TLB_1K		0x00000000	/* Page sizes */
#define PPC44x_TLB_4K		0x00000010
#define PPC44x_TLB_16K		0x00000020
#define PPC44x_TLB_64K		0x00000030
#define PPC44x_TLB_256K		0x00000040
#define PPC44x_TLB_1M		0x00000050
#define PPC44x_TLB_16M		0x00000070
#define	PPC44x_TLB_256M		0x00000090

/* Translation fields */
#define PPC44x_TLB_RPN_MASK	0xfffffc00      /* Real Page Number */
#define	PPC44x_TLB_ERPN_MASK	0x0000000f

/* Storage attribute and access control fields */
#define PPC44x_TLB_ATTR_MASK	0x0000ff80
#define PPC44x_TLB_U0		0x00008000      /* User 0 */
#define PPC44x_TLB_U1		0x00004000      /* User 1 */
#define PPC44x_TLB_U2		0x00002000      /* User 2 */
#define PPC44x_TLB_U3		0x00001000      /* User 3 */
#define PPC44x_TLB_W		0x00000800      /* Caching is write-through */
#define PPC44x_TLB_I		0x00000400      /* Caching is inhibited */
#define PPC44x_TLB_M		0x00000200      /* Memory is coherent */
#define PPC44x_TLB_G		0x00000100      /* Memory is guarded */
#define PPC44x_TLB_E		0x00000080      /* Memory is guarded */

#define PPC44x_TLB_PERM_MASK	0x0000003f
#define PPC44x_TLB_UX		0x00000020      /* User execution */
#define PPC44x_TLB_UW		0x00000010      /* User write */
#define PPC44x_TLB_UR		0x00000008      /* User read */
#define PPC44x_TLB_SX		0x00000004      /* Super execution */
#define PPC44x_TLB_SW		0x00000002      /* Super write */
#define PPC44x_TLB_SR		0x00000001      /* Super read */

/* Book-E defined page sizes */
#define BOOKE_PAGESZ_1K		0
#define BOOKE_PAGESZ_4K		1
#define BOOKE_PAGESZ_16K	2
#define BOOKE_PAGESZ_64K	3
#define BOOKE_PAGESZ_256K	4
#define BOOKE_PAGESZ_1M		5
#define BOOKE_PAGESZ_4M		6
#define BOOKE_PAGESZ_16M	7
#define BOOKE_PAGESZ_64M	8
#define BOOKE_PAGESZ_256M	9
#define BOOKE_PAGESZ_1GB	10
#define BOOKE_PAGESZ_4GB	11
#define BOOKE_PAGESZ_16GB	12
#define BOOKE_PAGESZ_64GB	13
#define BOOKE_PAGESZ_256GB	14
#define BOOKE_PAGESZ_1TB	15

/*
 * Freescale Book-E MMU support
 */

#define MAS0_TLBSEL(x)	((x << 28) & 0x30000000)
#define MAS0_ESEL(x)	((x << 16) & 0x0FFF0000)
#define MAS0_NV(x)	((x) & 0x00000FFF)

#define MAS1_VALID 	0x80000000
#define MAS1_IPROT	0x40000000
#define MAS1_TID(x)	((x << 16) & 0x3FFF0000)
#define MAS1_TS		0x00001000
#define MAS1_TSIZE(x)	((x << 8) & 0x00000F00)

#define MAS2_EPN	0xFFFFF000
#define MAS2_X0		0x00000040
#define MAS2_X1		0x00000020
#define MAS2_W		0x00000010
#define MAS2_I		0x00000008
#define MAS2_M		0x00000004
#define MAS2_G		0x00000002
#define MAS2_E		0x00000001

#define MAS3_RPN	0xFFFFF000
#define MAS3_U0		0x00000200
#define MAS3_U1		0x00000100
#define MAS3_U2		0x00000080
#define MAS3_U3		0x00000040
#define MAS3_UX		0x00000020
#define MAS3_SX		0x00000010
#define MAS3_UW		0x00000008
#define MAS3_SW		0x00000004
#define MAS3_UR		0x00000002
#define MAS3_SR		0x00000001

#define MAS4_TLBSELD(x) MAS0_TLBSEL(x)
#define MAS4_TIDDSEL	0x000F0000
#define MAS4_TSIZED(x)	MAS1_TSIZE(x)
#define MAS4_X0D	0x00000040
#define MAS4_X1D	0x00000020
#define MAS4_WD		0x00000010
#define MAS4_ID		0x00000008
#define MAS4_MD		0x00000004
#define MAS4_GD		0x00000002
#define MAS4_ED		0x00000001

#define MAS6_SPID0	0x3FFF0000
#define MAS6_SPID1	0x00007FFE
#define MAS6_SAS	0x00000001
#define MAS6_SPID	MAS6_SPID0

#define MAS7_RPN	0xFFFFFFFF

#endif /* _PPC_MMU_H_ */
#endif /* __KERNEL__ */