2 * PowerPC memory management structures
8 #include <linux/config.h>
11 /* Hardware Page Table Entry */
13 #ifdef CONFIG_PPC64BRIDGE
14 unsigned long long vsid:52;
19 unsigned long long rpn:52;
20 #else /* CONFIG_PPC64BRIDGE */
21 unsigned long v:1; /* Entry is valid */
22 unsigned long vsid:24; /* Virtual segment identifier */
23 unsigned long h:1; /* Hash algorithm indicator */
24 unsigned long api:6; /* Abbreviated page index */
25 unsigned long rpn:20; /* Real (physical) page number */
26 #endif /* CONFIG_PPC64BRIDGE */
27 unsigned long :3; /* Unused */
28 unsigned long r:1; /* Referenced */
29 unsigned long c:1; /* Changed */
30 unsigned long w:1; /* Write-thru cache mode */
31 unsigned long i:1; /* Cache inhibited */
32 unsigned long m:1; /* Memory coherence */
33 unsigned long g:1; /* Guarded */
34 unsigned long :1; /* Unused */
35 unsigned long pp:2; /* Page protection */
38 /* Values for PP (assumes Ks=0, Kp=1) */
39 #define PP_RWXX 0 /* Supervisor read/write, User none */
40 #define PP_RWRX 1 /* Supervisor read/write, User read */
41 #define PP_RWRW 2 /* Supervisor read/write, User read/write */
42 #define PP_RXRX 3 /* Supervisor read, User read */
44 /* Segment Register */
45 typedef struct _SEGREG {
46 unsigned long t:1; /* Normal or I/O type */
47 unsigned long ks:1; /* Supervisor 'key' (normally 0) */
48 unsigned long kp:1; /* User 'key' (normally 1) */
49 unsigned long n:1; /* No-execute */
50 unsigned long :4; /* Unused */
51 unsigned long vsid:24; /* Virtual Segment Identifier */
54 /* Block Address Translation (BAT) Registers */
55 typedef struct _P601_BATU { /* Upper part of BAT for 601 processor */
56 unsigned long bepi:15; /* Effective page index (virtual address) */
57 unsigned long :8; /* unused */
59 unsigned long i:1; /* Cache inhibit */
60 unsigned long m:1; /* Memory coherence */
61 unsigned long ks:1; /* Supervisor key (normally 0) */
62 unsigned long kp:1; /* User key (normally 1) */
63 unsigned long pp:2; /* Page access protections */
66 typedef struct _BATU { /* Upper part of BAT (all except 601) */
67 #ifdef CONFIG_PPC64BRIDGE
68 unsigned long long bepi:47;
69 #else /* CONFIG_PPC64BRIDGE */
70 unsigned long bepi:15; /* Effective page index (virtual address) */
71 #endif /* CONFIG_PPC64BRIDGE */
72 unsigned long :4; /* Unused */
73 unsigned long bl:11; /* Block size mask */
74 unsigned long vs:1; /* Supervisor valid */
75 unsigned long vp:1; /* User valid */
78 typedef struct _P601_BATL { /* Lower part of BAT for 601 processor */
79 unsigned long brpn:15; /* Real page index (physical address) */
80 unsigned long :10; /* Unused */
81 unsigned long v:1; /* Valid bit */
82 unsigned long bl:6; /* Block size mask */
85 typedef struct _BATL { /* Lower part of BAT (all except 601) */
86 #ifdef CONFIG_PPC64BRIDGE
87 unsigned long long brpn:47;
88 #else /* CONFIG_PPC64BRIDGE */
89 unsigned long brpn:15; /* Real page index (physical address) */
90 #endif /* CONFIG_PPC64BRIDGE */
91 unsigned long :10; /* Unused */
92 unsigned long w:1; /* Write-thru cache */
93 unsigned long i:1; /* Cache inhibit */
94 unsigned long m:1; /* Memory coherence */
95 unsigned long g:1; /* Guarded (MBZ in IBAT) */
96 unsigned long :1; /* Unused */
97 unsigned long pp:2; /* Page access protections */
100 typedef struct _BAT {
101 BATU batu; /* Upper register */
102 BATL batl; /* Lower register */
105 typedef struct _P601_BAT {
106 P601_BATU batu; /* Upper register */
107 P601_BATL batl; /* Lower register */
111 * Simulated two-level MMU. This structure is used by the kernel
112 * to keep track of MMU mappings and is used to update/maintain
113 * the hardware HASH table which is really a cache of mappings.
115 * The simulated structures mimic the hardware available on other
116 * platforms, notably the 80x86 and 680x0.
119 typedef struct _pte {
120 unsigned long page_num:20;
121 unsigned long flags:12; /* Page flags (some unused bits) */
124 #define PD_SHIFT (10+12) /* Page directory */
125 #define PD_MASK 0x02FF
126 #define PT_SHIFT (12) /* Page Table */
127 #define PT_MASK 0x02FF
128 #define PG_SHIFT (12) /* Page Entry */
133 typedef struct _MMU_context {
134 SEGREG segs[16]; /* Segment registers */
135 pte **pmap; /* Two-level page-map structure */
138 extern void _tlbie(unsigned long va); /* invalidate a TLB entry */
139 extern void _tlbia(void); /* invalidate all TLB entries */
142 IBAT0 = 0, IBAT1, IBAT2, IBAT3,
143 DBAT0, DBAT1, DBAT2, DBAT3
146 extern int read_bat(ppc_bat_t bat, unsigned long *upper, unsigned long *lower);
147 extern int write_bat(ppc_bat_t bat, unsigned long upper, unsigned long lower);
149 #endif /* __ASSEMBLY__ */
151 /* Block size masks */
152 #define BL_128K 0x000
153 #define BL_256K 0x001
154 #define BL_512K 0x003
162 #define BL_128M 0x3FF
163 #define BL_256M 0x7FF
165 /* BAT Access Protection */
166 #define BPP_XX 0x00 /* No access */
167 #define BPP_RX 0x01 /* Read only */
168 #define BPP_RW 0x02 /* Read/write */
170 /* Used to set up SDR1 register */
171 #define HASH_TABLE_SIZE_64K 0x00010000
172 #define HASH_TABLE_SIZE_128K 0x00020000
173 #define HASH_TABLE_SIZE_256K 0x00040000
174 #define HASH_TABLE_SIZE_512K 0x00080000
175 #define HASH_TABLE_SIZE_1M 0x00100000
176 #define HASH_TABLE_SIZE_2M 0x00200000
177 #define HASH_TABLE_SIZE_4M 0x00400000
178 #define HASH_TABLE_MASK_64K 0x000
179 #define HASH_TABLE_MASK_128K 0x001
180 #define HASH_TABLE_MASK_256K 0x003
181 #define HASH_TABLE_MASK_512K 0x007
182 #define HASH_TABLE_MASK_1M 0x00F
183 #define HASH_TABLE_MASK_2M 0x01F
184 #define HASH_TABLE_MASK_4M 0x03F
186 /* Control/status registers for the MPC8xx.
187 * A write operation to these registers causes serialized access.
188 * During software tablewalk, the registers used perform mask/shift-add
189 * operations when written/read. A TLB entry is created when the Mx_RPN
190 * is written, and the contents of several registers are used to
193 #define MI_CTR 784 /* Instruction TLB control register */
194 #define MI_GPM 0x80000000 /* Set domain manager mode */
195 #define MI_PPM 0x40000000 /* Set subpage protection */
196 #define MI_CIDEF 0x20000000 /* Set cache inhibit when MMU dis */
197 #define MI_RSV4I 0x08000000 /* Reserve 4 TLB entries */
198 #define MI_PPCS 0x02000000 /* Use MI_RPN prob/priv state */
199 #define MI_IDXMASK 0x00001f00 /* TLB index to be loaded */
200 #define MI_RESETVAL 0x00000000 /* Value of register at reset */
202 /* These are the Ks and Kp from the PowerPC books. For proper operation,
206 #define MI_Ks 0x80000000 /* Should not be set */
207 #define MI_Kp 0x40000000 /* Should always be set */
209 /* The effective page number register. When read, contains the information
210 * about the last instruction TLB miss. When MI_RPN is written, bits in
211 * this register are used to create the TLB entry.
214 #define MI_EPNMASK 0xfffff000 /* Effective page number for entry */
215 #define MI_EVALID 0x00000200 /* Entry is valid */
216 #define MI_ASIDMASK 0x0000000f /* ASID match value */
217 /* Reset value is undefined */
219 /* A "level 1" or "segment" or whatever you want to call it register.
220 * For the instruction TLB, it contains bits that get loaded into the
221 * TLB entry when the MI_RPN is written.
224 #define MI_APG 0x000001e0 /* Access protection group (0) */
225 #define MI_GUARDED 0x00000010 /* Guarded storage */
226 #define MI_PSMASK 0x0000000c /* Mask of page size bits */
227 #define MI_PS8MEG 0x0000000c /* 8M page size */
228 #define MI_PS512K 0x00000004 /* 512K page size */
229 #define MI_PS4K_16K 0x00000000 /* 4K or 16K page size */
230 #define MI_SVALID 0x00000001 /* Segment entry is valid */
231 /* Reset value is undefined */
233 /* Real page number. Defined by the pte. Writing this register
234 * causes a TLB entry to be created for the instruction TLB, using
235 * additional information from the MI_EPN, and MI_TWC registers.
239 /* Define an RPN value for mapping kernel memory to large virtual
240 * pages for boot initialization. This has real page number of 0,
241 * large page size, shared page, cache enabled, and valid.
242 * Also mark all subpages valid and write access.
244 #define MI_BOOTINIT 0x000001fd
246 #define MD_CTR 792 /* Data TLB control register */
247 #define MD_GPM 0x80000000 /* Set domain manager mode */
248 #define MD_PPM 0x40000000 /* Set subpage protection */
249 #define MD_CIDEF 0x20000000 /* Set cache inhibit when MMU dis */
250 #define MD_WTDEF 0x10000000 /* Set writethrough when MMU dis */
251 #define MD_RSV4I 0x08000000 /* Reserve 4 TLB entries */
252 #define MD_TWAM 0x04000000 /* Use 4K page hardware assist */
253 #define MD_PPCS 0x02000000 /* Use MI_RPN prob/priv state */
254 #define MD_IDXMASK 0x00001f00 /* TLB index to be loaded */
255 #define MD_RESETVAL 0x04000000 /* Value of register at reset */
257 #define M_CASID 793 /* Address space ID (context) to match */
258 #define MC_ASIDMASK 0x0000000f /* Bits used for ASID value */
261 /* These are the Ks and Kp from the PowerPC books. For proper operation,
265 #define MD_Ks 0x80000000 /* Should not be set */
266 #define MD_Kp 0x40000000 /* Should always be set */
268 /* The effective page number register. When read, contains the information
269 * about the last instruction TLB miss. When MD_RPN is written, bits in
270 * this register are used to create the TLB entry.
273 #define MD_EPNMASK 0xfffff000 /* Effective page number for entry */
274 #define MD_EVALID 0x00000200 /* Entry is valid */
275 #define MD_ASIDMASK 0x0000000f /* ASID match value */
276 /* Reset value is undefined */
278 /* The pointer to the base address of the first level page table.
279 * During a software tablewalk, reading this register provides the address
280 * of the entry associated with MD_EPN.
283 #define M_L1TB 0xfffff000 /* Level 1 table base address */
284 #define M_L1INDX 0x00000ffc /* Level 1 index, when read */
285 /* Reset value is undefined */
287 /* A "level 1" or "segment" or whatever you want to call it register.
288 * For the data TLB, it contains bits that get loaded into the TLB entry
289 * when the MD_RPN is written. It is also provides the hardware assist
290 * for finding the PTE address during software tablewalk.
293 #define MD_L2TB 0xfffff000 /* Level 2 table base address */
294 #define MD_L2INDX 0xfffffe00 /* Level 2 index (*pte), when read */
295 #define MD_APG 0x000001e0 /* Access protection group (0) */
296 #define MD_GUARDED 0x00000010 /* Guarded storage */
297 #define MD_PSMASK 0x0000000c /* Mask of page size bits */
298 #define MD_PS8MEG 0x0000000c /* 8M page size */
299 #define MD_PS512K 0x00000004 /* 512K page size */
300 #define MD_PS4K_16K 0x00000000 /* 4K or 16K page size */
301 #define MD_WT 0x00000002 /* Use writethrough page attribute */
302 #define MD_SVALID 0x00000001 /* Segment entry is valid */
303 /* Reset value is undefined */
306 /* Real page number. Defined by the pte. Writing this register
307 * causes a TLB entry to be created for the data TLB, using
308 * additional information from the MD_EPN, and MD_TWC registers.
312 /* This is a temporary storage register that could be used to save
313 * a processor working register during a tablewalk.
318 * At present, all PowerPC 400-class processors share a similar TLB
319 * architecture. The instruction and data sides share a unified,
320 * 64-entry, fully-associative TLB which is maintained totally under
321 * software control. In addition, the instruction side has a
322 * hardware-managed, 4-entry, fully- associative TLB which serves as a
323 * first level to the shared TLB. These two TLBs are known as the UTLB
324 * and ITLB, respectively.
327 #define PPC4XX_TLB_SIZE 64
330 * TLB entries are defined by a "high" tag portion and a "low" data
331 * portion. On all architectures, the data portion is 32-bits.
333 * TLB entries are managed entirely under software control by reading,
334 * writing, and searchoing using the 4xx-specific tlbre, tlbwr, and tlbsx
341 #define TLB_DATA TLB_LO
342 #define TLB_TAG TLB_HI
346 #define TLB_EPN_MASK 0xFFFFFC00 /* Effective Page Number */
347 #define TLB_PAGESZ_MASK 0x00000380
348 #define TLB_PAGESZ(x) (((x) & 0x7) << 7)
353 #define PAGESZ_256K 4
357 #define TLB_VALID 0x00000040 /* Entry is valid */
361 #define TLB_RPN_MASK 0xFFFFFC00 /* Real Page Number */
362 #define TLB_PERM_MASK 0x00000300
363 #define TLB_EX 0x00000200 /* Instruction execution allowed */
364 #define TLB_WR 0x00000100 /* Writes permitted */
365 #define TLB_ZSEL_MASK 0x000000F0
366 #define TLB_ZSEL(x) (((x) & 0xF) << 4)
367 #define TLB_ATTR_MASK 0x0000000F
368 #define TLB_W 0x00000008 /* Caching is write-through */
369 #define TLB_I 0x00000004 /* Caching is inhibited */
370 #define TLB_M 0x00000002 /* Memory is coherent */
371 #define TLB_G 0x00000001 /* Memory is guarded from prefetch */
377 #define MAS0_TLBSEL 0x10000000
378 #define MAS0_ESEL 0x000F0000
379 #define MAS0_NV 0x00000001
381 #define MAS1_VALID 0x80000000
382 #define MAS1_IPROT 0x40000000
383 #define MAS1_TID 0x00FF0000
384 #define MAS1_TS 0x00001000
385 #define MAS1_TSIZE 0x00000F00
387 #define MAS2_EPN 0xFFFFF000
388 #define MAS2_SHAREN 0x00000200
389 #define MAS2_X0 0x00000040
390 #define MAS2_X1 0x00000020
391 #define MAS2_W 0x00000010
392 #define MAS2_I 0x00000008
393 #define MAS2_M 0x00000004
394 #define MAS2_G 0x00000002
395 #define MAS2_E 0x00000001
397 #define MAS3_RPN 0xFFFFF000
398 #define MAS3_U0 0x00000200
399 #define MAS3_U1 0x00000100
400 #define MAS3_U2 0x00000080
401 #define MAS3_U3 0x00000040
402 #define MAS3_UX 0x00000020
403 #define MAS3_SX 0x00000010
404 #define MAS3_UW 0x00000008
405 #define MAS3_SW 0x00000004
406 #define MAS3_UR 0x00000002
407 #define MAS3_SR 0x00000001
409 #define MAS4_TLBSELD 0x10000000
410 #define MAS4_TIDDSEL 0x00030000
411 #define MAS4_DSHAREN 0x00001000
412 #define MAS4_TSIZED(x) (x << 8)
413 #define MAS4_X0D 0x00000040
414 #define MAS4_X1D 0x00000020
415 #define MAS4_WD 0x00000010
416 #define MAS4_ID 0x00000008
417 #define MAS4_MD 0x00000004
418 #define MAS4_GD 0x00000002
419 #define MAS4_ED 0x00000001
421 #define MAS6_SPID 0x00FF0000
422 #define MAS6_SAS 0x00000001
424 #define BOOKE_PAGESZ_1K 0
425 #define BOOKE_PAGESZ_4K 1
426 #define BOOKE_PAGESZ_16K 2
427 #define BOOKE_PAGESZ_64K 3
428 #define BOOKE_PAGESZ_256K 4
429 #define BOOKE_PAGESZ_1M 5
430 #define BOOKE_PAGESZ_4M 6
431 #define BOOKE_PAGESZ_16M 7
432 #define BOOKE_PAGESZ_64M 8
433 #define BOOKE_PAGESZ_256M 9
434 #define BOOKE_PAGESZ_1GB 10
435 #define BOOKE_PAGESZ_4GB 11
437 #if defined(CONFIG_MPC86xx)
438 #define LAWBAR_BASE_ADDR 0x00FFFFFF
439 #define LAWAR_TRGT_IF 0x01F00000
441 #define LAWBAR_BASE_ADDR 0x000FFFFF
442 #define LAWAR_TRGT_IF 0x00F00000
444 #define LAWAR_EN 0x80000000
445 #define LAWAR_SIZE 0x0000003F
447 #define LAWAR_TRGT_IF_PCI 0x00000000
448 #define LAWAR_TRGT_IF_PCI1 0x00000000
449 #define LAWAR_TRGT_IF_PCIX 0x00000000
450 #define LAWAR_TRGT_IF_PCI2 0x00100000
451 #define LAWAR_TRGT_IF_HT 0x00200000
452 #define LAWAR_TRGT_IF_LBC 0x00400000
453 #define LAWAR_TRGT_IF_CCSR 0x00800000
454 #define LAWAR_TRGT_IF_DDR_INTERLEAVED 0x00B00000
455 #define LAWAR_TRGT_IF_RIO 0x00c00000
456 #define LAWAR_TRGT_IF_DDR 0x00f00000
457 #define LAWAR_TRGT_IF_DDR1 0x00f00000
458 #define LAWAR_TRGT_IF_DDR2 0x01600000
460 #define LAWAR_SIZE_BASE 0xa
461 #define LAWAR_SIZE_4K (LAWAR_SIZE_BASE+1)
462 #define LAWAR_SIZE_8K (LAWAR_SIZE_BASE+2)
463 #define LAWAR_SIZE_16K (LAWAR_SIZE_BASE+3)
464 #define LAWAR_SIZE_32K (LAWAR_SIZE_BASE+4)
465 #define LAWAR_SIZE_64K (LAWAR_SIZE_BASE+5)
466 #define LAWAR_SIZE_128K (LAWAR_SIZE_BASE+6)
467 #define LAWAR_SIZE_256K (LAWAR_SIZE_BASE+7)
468 #define LAWAR_SIZE_512K (LAWAR_SIZE_BASE+8)
469 #define LAWAR_SIZE_1M (LAWAR_SIZE_BASE+9)
470 #define LAWAR_SIZE_2M (LAWAR_SIZE_BASE+10)
471 #define LAWAR_SIZE_4M (LAWAR_SIZE_BASE+11)
472 #define LAWAR_SIZE_8M (LAWAR_SIZE_BASE+12)
473 #define LAWAR_SIZE_16M (LAWAR_SIZE_BASE+13)
474 #define LAWAR_SIZE_32M (LAWAR_SIZE_BASE+14)
475 #define LAWAR_SIZE_64M (LAWAR_SIZE_BASE+15)
476 #define LAWAR_SIZE_128M (LAWAR_SIZE_BASE+16)
477 #define LAWAR_SIZE_256M (LAWAR_SIZE_BASE+17)
478 #define LAWAR_SIZE_512M (LAWAR_SIZE_BASE+18)
479 #define LAWAR_SIZE_1G (LAWAR_SIZE_BASE+19)
480 #define LAWAR_SIZE_2G (LAWAR_SIZE_BASE+20)
481 #define LAWAR_SIZE_4G (LAWAR_SIZE_BASE+21)
482 #define LAWAR_SIZE_8G (LAWAR_SIZE_BASE+22)
483 #define LAWAR_SIZE_16G (LAWAR_SIZE_BASE+23)
484 #define LAWAR_SIZE_32G (LAWAR_SIZE_BASE+24)
486 #endif /* _PPC_MMU_H_ */