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1/* $Id: pgtable.h,v 1.156 2002/02/09 19:49:31 davem Exp $
2 * pgtable.h: SpitFire page table operations.
3 *
4 * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 */
7
8#ifndef _SPARC64_PGTABLE_H
9#define _SPARC64_PGTABLE_H
10
11/* This file contains the functions and defines necessary to modify and use
12 * the SpitFire page tables.
13 */
14
15#include <asm-generic/pgtable-nopud.h>
16
17#include <linux/compiler.h>
18#include <linux/const.h>
19#include <asm/types.h>
20#include <asm/spitfire.h>
21#include <asm/asi.h>
22#include <asm/system.h>
23#include <asm/page.h>
24#include <asm/processor.h>
25
26/* The kernel image occupies 0x4000000 to 0x1000000 (4MB --> 32MB).
27 * The page copy blockops can use 0x2000000 to 0x4000000.
28 * The TSB is mapped in the 0x4000000 to 0x6000000 range.
29 * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
30 * The vmalloc area spans 0x100000000 to 0x200000000.
31 * Since modules need to be in the lowest 32-bits of the address space,
32 * we place them right before the OBP area from 0x10000000 to 0xf0000000.
33 * There is a single static kernel PMD which maps from 0x0 to address
34 * 0x400000000.
35 */
36#define TLBTEMP_BASE _AC(0x0000000002000000,UL)
37#define TSBMAP_BASE _AC(0x0000000004000000,UL)
38#define MODULES_VADDR _AC(0x0000000010000000,UL)
39#define MODULES_LEN _AC(0x00000000e0000000,UL)
40#define MODULES_END _AC(0x00000000f0000000,UL)
41#define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL)
42#define HI_OBP_ADDRESS _AC(0x0000000100000000,UL)
43#define VMALLOC_START _AC(0x0000000100000000,UL)
44#define VMALLOC_END _AC(0x0000000200000000,UL)
45
46/* XXX All of this needs to be rethought so we can take advantage
47 * XXX cheetah's full 64-bit virtual address space, ie. no more hole
48 * XXX in the middle like on spitfire. -DaveM
49 */
50/*
51 * Given a virtual address, the lowest PAGE_SHIFT bits determine offset
52 * into the page; the next higher PAGE_SHIFT-3 bits determine the pte#
53 * in the proper pagetable (the -3 is from the 8 byte ptes, and each page
54 * table is a single page long). The next higher PMD_BITS determine pmd#
55 * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2)
56 * since the pmd entries are 4 bytes, and each pmd page is a single page
57 * long). Finally, the higher few bits determine pgde#.
58 */
59
60/* PMD_SHIFT determines the size of the area a second-level page
61 * table can map
62 */
63#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
64#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
65#define PMD_MASK (~(PMD_SIZE-1))
66#define PMD_BITS (PAGE_SHIFT - 2)
67
68/* PGDIR_SHIFT determines what a third-level page table entry can map */
69#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS)
70#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
71#define PGDIR_MASK (~(PGDIR_SIZE-1))
72#define PGDIR_BITS (PAGE_SHIFT - 2)
73
74#ifndef __ASSEMBLY__
75
76#include <linux/sched.h>
77
78/* Entries per page directory level. */
79#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
80#define PTRS_PER_PMD (1UL << PMD_BITS)
81#define PTRS_PER_PGD (1UL << PGDIR_BITS)
82
83/* Kernel has a separate 44bit address space. */
84#define FIRST_USER_ADDRESS 0
85
86#define pte_ERROR(e) __builtin_trap()
87#define pmd_ERROR(e) __builtin_trap()
88#define pgd_ERROR(e) __builtin_trap()
89
90#endif /* !(__ASSEMBLY__) */
91
92/* PTE bits which are the same in SUN4U and SUN4V format. */
93#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
94#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
95
96/* SUN4U pte bits... */
97#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
98#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
99#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
100#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
101#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
102#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
103#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
104#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
105#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
106#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
107#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
108#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
109#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
110#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
111#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
112#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
113#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
114#define _PAGE_FILE_4U _AC(0x0000000000000800,UL) /* Pagecache page */
115#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
116#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
117#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
118#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
119#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
120#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
121#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
122#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
123#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
124#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
125
126/* SUN4V pte bits... */
127#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
128#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
129#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
130#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
131#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
132#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
133#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
134#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
135#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
136#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
137#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
138#define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */
139#define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */
140#define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */
141#define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */
142#define _PAGE_FILE_4V _AC(0x0000000000000020,UL) /* Pagecache page */
143#define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */
144#define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */
145#define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */
146#define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */
147#define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */
148#define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */
149#define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */
150#define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */
151#define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */
152#define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */
153#define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */
154
155#if PAGE_SHIFT == 13
156#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
157#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
158#elif PAGE_SHIFT == 16
159#define _PAGE_SZBITS_4U _PAGE_SZ64K_4U
160#define _PAGE_SZBITS_4V _PAGE_SZ64K_4V
161#elif PAGE_SHIFT == 19
162#define _PAGE_SZBITS_4U _PAGE_SZ512K_4U
163#define _PAGE_SZBITS_4V _PAGE_SZ512K_4V
164#elif PAGE_SHIFT == 22
165#define _PAGE_SZBITS_4U _PAGE_SZ4MB_4U
166#define _PAGE_SZBITS_4V _PAGE_SZ4MB_4V
167#else
168#error Wrong PAGE_SHIFT specified
169#endif
170
171#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
172#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
173#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
174#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
175#define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U
176#define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V
177#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
178#define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U
179#define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V
180#endif
181
182/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
183#define __P000 __pgprot(0)
184#define __P001 __pgprot(0)
185#define __P010 __pgprot(0)
186#define __P011 __pgprot(0)
187#define __P100 __pgprot(0)
188#define __P101 __pgprot(0)
189#define __P110 __pgprot(0)
190#define __P111 __pgprot(0)
191
192#define __S000 __pgprot(0)
193#define __S001 __pgprot(0)
194#define __S010 __pgprot(0)
195#define __S011 __pgprot(0)
196#define __S100 __pgprot(0)
197#define __S101 __pgprot(0)
198#define __S110 __pgprot(0)
199#define __S111 __pgprot(0)
200
201#ifndef __ASSEMBLY__
202
203extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
204
205extern unsigned long pte_sz_bits(unsigned long size);
206
207extern pgprot_t PAGE_KERNEL;
208extern pgprot_t PAGE_KERNEL_LOCKED;
209extern pgprot_t PAGE_COPY;
210extern pgprot_t PAGE_SHARED;
211
212/* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
213extern unsigned long _PAGE_IE;
214extern unsigned long _PAGE_E;
215extern unsigned long _PAGE_CACHE;
216
217extern unsigned long pg_iobits;
218extern unsigned long _PAGE_ALL_SZ_BITS;
219extern unsigned long _PAGE_SZBITS;
220
221extern struct page *mem_map_zero;
222#define ZERO_PAGE(vaddr) (mem_map_zero)
223
224/* PFNs are real physical page numbers. However, mem_map only begins to record
225 * per-page information starting at pfn_base. This is to handle systems where
226 * the first physical page in the machine is at some huge physical address,
227 * such as 4GB. This is common on a partitioned E10000, for example.
228 */
229static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
230{
231 unsigned long paddr = pfn << PAGE_SHIFT;
232 unsigned long sz_bits;
233
234 sz_bits = 0UL;
235 if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) {
236 __asm__ __volatile__(
237 "\n661: sethi %%uhi(%1), %0\n"
238 " sllx %0, 32, %0\n"
239 " .section .sun4v_2insn_patch, \"ax\"\n"
240 " .word 661b\n"
241 " mov %2, %0\n"
242 " nop\n"
243 " .previous\n"
244 : "=r" (sz_bits)
245 : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V));
246 }
247 return __pte(paddr | sz_bits | pgprot_val(prot));
248}
249#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
250
251/* This one can be done with two shifts. */
252static inline unsigned long pte_pfn(pte_t pte)
253{
254 unsigned long ret;
255
256 __asm__ __volatile__(
257 "\n661: sllx %1, %2, %0\n"
258 " srlx %0, %3, %0\n"
259 " .section .sun4v_2insn_patch, \"ax\"\n"
260 " .word 661b\n"
261 " sllx %1, %4, %0\n"
262 " srlx %0, %5, %0\n"
263 " .previous\n"
264 : "=r" (ret)
265 : "r" (pte_val(pte)),
266 "i" (21), "i" (21 + PAGE_SHIFT),
267 "i" (8), "i" (8 + PAGE_SHIFT));
268
269 return ret;
270}
271#define pte_page(x) pfn_to_page(pte_pfn(x))
272
273static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
274{
275 unsigned long mask, tmp;
276
277 /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347)
278 * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8)
279 *
280 * Even if we use negation tricks the result is still a 6
281 * instruction sequence, so don't try to play fancy and just
282 * do the most straightforward implementation.
283 *
284 * Note: We encode this into 3 sun4v 2-insn patch sequences.
285 */
286
287 __asm__ __volatile__(
288 "\n661: sethi %%uhi(%2), %1\n"
289 " sethi %%hi(%2), %0\n"
290 "\n662: or %1, %%ulo(%2), %1\n"
291 " or %0, %%lo(%2), %0\n"
292 "\n663: sllx %1, 32, %1\n"
293 " or %0, %1, %0\n"
294 " .section .sun4v_2insn_patch, \"ax\"\n"
295 " .word 661b\n"
296 " sethi %%uhi(%3), %1\n"
297 " sethi %%hi(%3), %0\n"
298 " .word 662b\n"
299 " or %1, %%ulo(%3), %1\n"
300 " or %0, %%lo(%3), %0\n"
301 " .word 663b\n"
302 " sllx %1, 32, %1\n"
303 " or %0, %1, %0\n"
304 " .previous\n"
305 : "=r" (mask), "=r" (tmp)
306 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
307 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U |
308 _PAGE_SZBITS_4U),
309 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
310 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V |
311 _PAGE_SZBITS_4V));
312
313 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
314}
315
316static inline pte_t pgoff_to_pte(unsigned long off)
317{
318 off <<= PAGE_SHIFT;
319
320 __asm__ __volatile__(
321 "\n661: or %0, %2, %0\n"
322 " .section .sun4v_1insn_patch, \"ax\"\n"
323 " .word 661b\n"
324 " or %0, %3, %0\n"
325 " .previous\n"
326 : "=r" (off)
327 : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
328
329 return __pte(off);
330}
331
332static inline pgprot_t pgprot_noncached(pgprot_t prot)
333{
334 unsigned long val = pgprot_val(prot);
335
336 __asm__ __volatile__(
337 "\n661: andn %0, %2, %0\n"
338 " or %0, %3, %0\n"
339 " .section .sun4v_2insn_patch, \"ax\"\n"
340 " .word 661b\n"
341 " andn %0, %4, %0\n"
342 " or %0, %5, %0\n"
343 " .previous\n"
344 : "=r" (val)
345 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
346 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V));
347
348 return __pgprot(val);
349}
350/* Various pieces of code check for platform support by ifdef testing
351 * on "pgprot_noncached". That's broken and should be fixed, but for
352 * now...
353 */
354#define pgprot_noncached pgprot_noncached
355
356#ifdef CONFIG_HUGETLB_PAGE
357static inline pte_t pte_mkhuge(pte_t pte)
358{
359 unsigned long mask;
360
361 __asm__ __volatile__(
362 "\n661: sethi %%uhi(%1), %0\n"
363 " sllx %0, 32, %0\n"
364 " .section .sun4v_2insn_patch, \"ax\"\n"
365 " .word 661b\n"
366 " mov %2, %0\n"
367 " nop\n"
368 " .previous\n"
369 : "=r" (mask)
370 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
371
372 return __pte(pte_val(pte) | mask);
373}
374#endif
375
376static inline pte_t pte_mkdirty(pte_t pte)
377{
378 unsigned long val = pte_val(pte), tmp;
379
380 __asm__ __volatile__(
381 "\n661: or %0, %3, %0\n"
382 " nop\n"
383 "\n662: nop\n"
384 " nop\n"
385 " .section .sun4v_2insn_patch, \"ax\"\n"
386 " .word 661b\n"
387 " sethi %%uhi(%4), %1\n"
388 " sllx %1, 32, %1\n"
389 " .word 662b\n"
390 " or %1, %%lo(%4), %1\n"
391 " or %0, %1, %0\n"
392 " .previous\n"
393 : "=r" (val), "=r" (tmp)
394 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
395 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
396
397 return __pte(val);
398}
399
400static inline pte_t pte_mkclean(pte_t pte)
401{
402 unsigned long val = pte_val(pte), tmp;
403
404 __asm__ __volatile__(
405 "\n661: andn %0, %3, %0\n"
406 " nop\n"
407 "\n662: nop\n"
408 " nop\n"
409 " .section .sun4v_2insn_patch, \"ax\"\n"
410 " .word 661b\n"
411 " sethi %%uhi(%4), %1\n"
412 " sllx %1, 32, %1\n"
413 " .word 662b\n"
414 " or %1, %%lo(%4), %1\n"
415 " andn %0, %1, %0\n"
416 " .previous\n"
417 : "=r" (val), "=r" (tmp)
418 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
419 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
420
421 return __pte(val);
422}
423
424static inline pte_t pte_mkwrite(pte_t pte)
425{
426 unsigned long val = pte_val(pte), mask;
427
428 __asm__ __volatile__(
429 "\n661: mov %1, %0\n"
430 " nop\n"
431 " .section .sun4v_2insn_patch, \"ax\"\n"
432 " .word 661b\n"
433 " sethi %%uhi(%2), %0\n"
434 " sllx %0, 32, %0\n"
435 " .previous\n"
436 : "=r" (mask)
437 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
438
439 return __pte(val | mask);
440}
441
442static inline pte_t pte_wrprotect(pte_t pte)
443{
444 unsigned long val = pte_val(pte), tmp;
445
446 __asm__ __volatile__(
447 "\n661: andn %0, %3, %0\n"
448 " nop\n"
449 "\n662: nop\n"
450 " nop\n"
451 " .section .sun4v_2insn_patch, \"ax\"\n"
452 " .word 661b\n"
453 " sethi %%uhi(%4), %1\n"
454 " sllx %1, 32, %1\n"
455 " .word 662b\n"
456 " or %1, %%lo(%4), %1\n"
457 " andn %0, %1, %0\n"
458 " .previous\n"
459 : "=r" (val), "=r" (tmp)
460 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
461 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
462
463 return __pte(val);
464}
465
466static inline pte_t pte_mkold(pte_t pte)
467{
468 unsigned long mask;
469
470 __asm__ __volatile__(
471 "\n661: mov %1, %0\n"
472 " nop\n"
473 " .section .sun4v_2insn_patch, \"ax\"\n"
474 " .word 661b\n"
475 " sethi %%uhi(%2), %0\n"
476 " sllx %0, 32, %0\n"
477 " .previous\n"
478 : "=r" (mask)
479 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
480
481 mask |= _PAGE_R;
482
483 return __pte(pte_val(pte) & ~mask);
484}
485
486static inline pte_t pte_mkyoung(pte_t pte)
487{
488 unsigned long mask;
489
490 __asm__ __volatile__(
491 "\n661: mov %1, %0\n"
492 " nop\n"
493 " .section .sun4v_2insn_patch, \"ax\"\n"
494 " .word 661b\n"
495 " sethi %%uhi(%2), %0\n"
496 " sllx %0, 32, %0\n"
497 " .previous\n"
498 : "=r" (mask)
499 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
500
501 mask |= _PAGE_R;
502
503 return __pte(pte_val(pte) | mask);
504}
505
506static inline unsigned long pte_young(pte_t pte)
507{
508 unsigned long mask;
509
510 __asm__ __volatile__(
511 "\n661: mov %1, %0\n"
512 " nop\n"
513 " .section .sun4v_2insn_patch, \"ax\"\n"
514 " .word 661b\n"
515 " sethi %%uhi(%2), %0\n"
516 " sllx %0, 32, %0\n"
517 " .previous\n"
518 : "=r" (mask)
519 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
520
521 return (pte_val(pte) & mask);
522}
523
524static inline unsigned long pte_dirty(pte_t pte)
525{
526 unsigned long mask;
527
528 __asm__ __volatile__(
529 "\n661: mov %1, %0\n"
530 " nop\n"
531 " .section .sun4v_2insn_patch, \"ax\"\n"
532 " .word 661b\n"
533 " sethi %%uhi(%2), %0\n"
534 " sllx %0, 32, %0\n"
535 " .previous\n"
536 : "=r" (mask)
537 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
538
539 return (pte_val(pte) & mask);
540}
541
542static inline unsigned long pte_write(pte_t pte)
543{
544 unsigned long mask;
545
546 __asm__ __volatile__(
547 "\n661: mov %1, %0\n"
548 " nop\n"
549 " .section .sun4v_2insn_patch, \"ax\"\n"
550 " .word 661b\n"
551 " sethi %%uhi(%2), %0\n"
552 " sllx %0, 32, %0\n"
553 " .previous\n"
554 : "=r" (mask)
555 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
556
557 return (pte_val(pte) & mask);
558}
559
560static inline unsigned long pte_exec(pte_t pte)
561{
562 unsigned long mask;
563
564 __asm__ __volatile__(
565 "\n661: sethi %%hi(%1), %0\n"
566 " .section .sun4v_1insn_patch, \"ax\"\n"
567 " .word 661b\n"
568 " mov %2, %0\n"
569 " .previous\n"
570 : "=r" (mask)
571 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
572
573 return (pte_val(pte) & mask);
574}
575
576static inline unsigned long pte_read(pte_t pte)
577{
578 unsigned long mask;
579
580 __asm__ __volatile__(
581 "\n661: mov %1, %0\n"
582 " nop\n"
583 " .section .sun4v_2insn_patch, \"ax\"\n"
584 " .word 661b\n"
585 " sethi %%uhi(%2), %0\n"
586 " sllx %0, 32, %0\n"
587 " .previous\n"
588 : "=r" (mask)
589 : "i" (_PAGE_READ_4U), "i" (_PAGE_READ_4V));
590
591 return (pte_val(pte) & mask);
592}
593
594static inline unsigned long pte_file(pte_t pte)
595{
596 unsigned long val = pte_val(pte);
597
598 __asm__ __volatile__(
599 "\n661: and %0, %2, %0\n"
600 " .section .sun4v_1insn_patch, \"ax\"\n"
601 " .word 661b\n"
602 " and %0, %3, %0\n"
603 " .previous\n"
604 : "=r" (val)
605 : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
606
607 return val;
608}
609
610static inline unsigned long pte_present(pte_t pte)
611{
612 unsigned long val = pte_val(pte);
613
614 __asm__ __volatile__(
615 "\n661: and %0, %2, %0\n"
616 " .section .sun4v_1insn_patch, \"ax\"\n"
617 " .word 661b\n"
618 " and %0, %3, %0\n"
619 " .previous\n"
620 : "=r" (val)
621 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
622
623 return val;
624}
625
626#define pmd_set(pmdp, ptep) \
627 (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
628#define pud_set(pudp, pmdp) \
629 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL))
630#define __pmd_page(pmd) \
631 ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL)))
632#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
633#define pud_page_vaddr(pud) \
634 ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
635#define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud))
636#define pmd_none(pmd) (!pmd_val(pmd))
637#define pmd_bad(pmd) (0)
638#define pmd_present(pmd) (pmd_val(pmd) != 0U)
639#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U)
640#define pud_none(pud) (!pud_val(pud))
641#define pud_bad(pud) (0)
642#define pud_present(pud) (pud_val(pud) != 0U)
643#define pud_clear(pudp) (pud_val(*(pudp)) = 0U)
644
645/* Same in both SUN4V and SUN4U. */
646#define pte_none(pte) (!pte_val(pte))
647
648/* to find an entry in a page-table-directory. */
649#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
650#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
651
652/* to find an entry in a kernel page-table-directory */
653#define pgd_offset_k(address) pgd_offset(&init_mm, address)
654
655/* Find an entry in the second-level page table.. */
656#define pmd_offset(pudp, address) \
657 ((pmd_t *) pud_page_vaddr(*(pudp)) + \
658 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
659
660/* Find an entry in the third-level page table.. */
661#define pte_index(dir, address) \
662 ((pte_t *) __pmd_page(*(dir)) + \
663 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
664#define pte_offset_kernel pte_index
665#define pte_offset_map pte_index
666#define pte_offset_map_nested pte_index
667#define pte_unmap(pte) do { } while (0)
668#define pte_unmap_nested(pte) do { } while (0)
669
670/* Actual page table PTE updates. */
671extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig);
672
673static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
674{
675 pte_t orig = *ptep;
676
677 *ptep = pte;
678
679 /* It is more efficient to let flush_tlb_kernel_range()
680 * handle init_mm tlb flushes.
681 *
682 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
683 * and SUN4V pte layout, so this inline test is fine.
684 */
685 if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID))
686 tlb_batch_add(mm, addr, ptep, orig);
687}
688
689#define pte_clear(mm,addr,ptep) \
690 set_pte_at((mm), (addr), (ptep), __pte(0UL))
691
692#ifdef DCACHE_ALIASING_POSSIBLE
693#define __HAVE_ARCH_MOVE_PTE
694#define move_pte(pte, prot, old_addr, new_addr) \
695({ \
696 pte_t newpte = (pte); \
697 if (tlb_type != hypervisor && pte_present(pte)) { \
698 unsigned long this_pfn = pte_pfn(pte); \
699 \
700 if (pfn_valid(this_pfn) && \
701 (((old_addr) ^ (new_addr)) & (1 << 13))) \
702 flush_dcache_page_all(current->mm, \
703 pfn_to_page(this_pfn)); \
704 } \
705 newpte; \
706})
707#endif
708
709extern pgd_t swapper_pg_dir[2048];
710extern pmd_t swapper_low_pmd_dir[2048];
711
712extern void paging_init(void);
713extern unsigned long find_ecache_flush_span(unsigned long size);
714
715/* These do nothing with the way I have things setup. */
716#define mmu_lockarea(vaddr, len) (vaddr)
717#define mmu_unlockarea(vaddr, len) do { } while(0)
718
719struct vm_area_struct;
720extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
721
722/* Encode and de-code a swap entry */
723#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
724#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
725#define __swp_entry(type, offset) \
726 ( (swp_entry_t) \
727 { \
728 (((long)(type) << PAGE_SHIFT) | \
729 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
730 } )
731#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
732#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
733
734/* File offset in PTE support. */
735extern unsigned long pte_file(pte_t);
736#define pte_to_pgoff(pte) (pte_val(pte) >> PAGE_SHIFT)
737extern pte_t pgoff_to_pte(unsigned long);
738#define PTE_FILE_MAX_BITS (64UL - PAGE_SHIFT - 1UL)
739
740extern unsigned long *sparc64_valid_addr_bitmap;
741
742/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
743#define kern_addr_valid(addr) \
744 (test_bit(__pa((unsigned long)(addr))>>22, sparc64_valid_addr_bitmap))
745
746extern int page_in_phys_avail(unsigned long paddr);
747
748extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
749 unsigned long pfn,
750 unsigned long size, pgprot_t prot);
751
752/*
753 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
754 * its high 4 bits. These macros/functions put it there or get it from there.
755 */
756#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
757#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
758#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
759
760#include <asm-generic/pgtable.h>
761
762/* We provide our own get_unmapped_area to cope with VA holes and
763 * SHM area cache aliasing for userland.
764 */
765#define HAVE_ARCH_UNMAPPED_AREA
766#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
767
768/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
769 * the largest alignment possible such that larget PTEs can be used.
770 */
771extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
772 unsigned long, unsigned long,
773 unsigned long);
774#define HAVE_ARCH_FB_UNMAPPED_AREA
775
776extern void pgtable_cache_init(void);
777extern void sun4v_register_fault_status(void);
778extern void sun4v_ktsb_register(void);
779
780extern unsigned long cmdline_memory_size;
781
782#endif /* !(__ASSEMBLY__) */
783
784#endif /* !(_SPARC64_PGTABLE_H) */