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1/*
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 <linux/compiler.h>
16#include <linux/const.h>
17#include <asm/types.h>
18#include <asm/spitfire.h>
19#include <asm/asi.h>
20#include <asm/page.h>
21#include <asm/processor.h>
22
23#include <asm-generic/pgtable-nopud.h>
24
25/* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB).
26 * The page copy blockops can use 0x6000000 to 0x8000000.
27 * The TSB is mapped in the 0x8000000 to 0xa000000 range.
28 * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
29 * The vmalloc area spans 0x100000000 to 0x200000000.
30 * Since modules need to be in the lowest 32-bits of the address space,
31 * we place them right before the OBP area from 0x10000000 to 0xf0000000.
32 * There is a single static kernel PMD which maps from 0x0 to address
33 * 0x400000000.
34 */
35#define TLBTEMP_BASE _AC(0x0000000006000000,UL)
36#define TSBMAP_BASE _AC(0x0000000008000000,UL)
37#define MODULES_VADDR _AC(0x0000000010000000,UL)
38#define MODULES_LEN _AC(0x00000000e0000000,UL)
39#define MODULES_END _AC(0x00000000f0000000,UL)
40#define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL)
41#define HI_OBP_ADDRESS _AC(0x0000000100000000,UL)
42#define VMALLOC_START _AC(0x0000000100000000,UL)
43#define VMALLOC_END _AC(0x0000010000000000,UL)
44#define VMEMMAP_BASE _AC(0x0000010000000000,UL)
45
46#define vmemmap ((struct page *)VMEMMAP_BASE)
47
48/* XXX All of this needs to be rethought so we can take advantage
49 * XXX cheetah's full 64-bit virtual address space, ie. no more hole
50 * XXX in the middle like on spitfire. -DaveM
51 */
52/*
53 * Given a virtual address, the lowest PAGE_SHIFT bits determine offset
54 * into the page; the next higher PAGE_SHIFT-3 bits determine the pte#
55 * in the proper pagetable (the -3 is from the 8 byte ptes, and each page
56 * table is a single page long). The next higher PMD_BITS determine pmd#
57 * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2)
58 * since the pmd entries are 4 bytes, and each pmd page is a single page
59 * long). Finally, the higher few bits determine pgde#.
60 */
61
62/* PMD_SHIFT determines the size of the area a second-level page
63 * table can map
64 */
65#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
66#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
67#define PMD_MASK (~(PMD_SIZE-1))
68#define PMD_BITS (PAGE_SHIFT - 2)
69
70/* PGDIR_SHIFT determines what a third-level page table entry can map */
71#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS)
72#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
73#define PGDIR_MASK (~(PGDIR_SIZE-1))
74#define PGDIR_BITS (PAGE_SHIFT - 2)
75
76#ifndef __ASSEMBLY__
77
78#include <linux/sched.h>
79
80/* Entries per page directory level. */
81#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
82#define PTRS_PER_PMD (1UL << PMD_BITS)
83#define PTRS_PER_PGD (1UL << PGDIR_BITS)
84
85/* Kernel has a separate 44bit address space. */
86#define FIRST_USER_ADDRESS 0
87
88#define pte_ERROR(e) __builtin_trap()
89#define pmd_ERROR(e) __builtin_trap()
90#define pgd_ERROR(e) __builtin_trap()
91
92#endif /* !(__ASSEMBLY__) */
93
94/* PTE bits which are the same in SUN4U and SUN4V format. */
95#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
96#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
97#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */
98
99/* Advertise support for _PAGE_SPECIAL */
100#define __HAVE_ARCH_PTE_SPECIAL
101
102/* SUN4U pte bits... */
103#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
104#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
105#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
106#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
107#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
108#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
109#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
110#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */
111#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
112#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
113#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
114#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
115#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
116#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
117#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
118#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
119#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
120#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
121#define _PAGE_FILE_4U _AC(0x0000000000000800,UL) /* Pagecache page */
122#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
123#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
124#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
125#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
126#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
127#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
128#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
129#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
130#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
131#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
132
133/* SUN4V pte bits... */
134#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
135#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
136#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
137#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
138#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
139#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
140#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */
141#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
142#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
143#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
144#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
145#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
146#define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */
147#define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */
148#define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */
149#define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */
150#define _PAGE_FILE_4V _AC(0x0000000000000020,UL) /* Pagecache page */
151#define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */
152#define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */
153#define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */
154#define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */
155#define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */
156#define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */
157#define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */
158#define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */
159#define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */
160#define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */
161#define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */
162
163#if PAGE_SHIFT == 13
164#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
165#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
166#elif PAGE_SHIFT == 16
167#define _PAGE_SZBITS_4U _PAGE_SZ64K_4U
168#define _PAGE_SZBITS_4V _PAGE_SZ64K_4V
169#else
170#error Wrong PAGE_SHIFT specified
171#endif
172
173#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
174#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
175#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
176#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
177#define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U
178#define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V
179#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
180#define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U
181#define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V
182#endif
183
184/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
185#define __P000 __pgprot(0)
186#define __P001 __pgprot(0)
187#define __P010 __pgprot(0)
188#define __P011 __pgprot(0)
189#define __P100 __pgprot(0)
190#define __P101 __pgprot(0)
191#define __P110 __pgprot(0)
192#define __P111 __pgprot(0)
193
194#define __S000 __pgprot(0)
195#define __S001 __pgprot(0)
196#define __S010 __pgprot(0)
197#define __S011 __pgprot(0)
198#define __S100 __pgprot(0)
199#define __S101 __pgprot(0)
200#define __S110 __pgprot(0)
201#define __S111 __pgprot(0)
202
203#ifndef __ASSEMBLY__
204
205extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
206
207extern unsigned long pte_sz_bits(unsigned long size);
208
209extern pgprot_t PAGE_KERNEL;
210extern pgprot_t PAGE_KERNEL_LOCKED;
211extern pgprot_t PAGE_COPY;
212extern pgprot_t PAGE_SHARED;
213
214/* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
215extern unsigned long _PAGE_IE;
216extern unsigned long _PAGE_E;
217extern unsigned long _PAGE_CACHE;
218
219extern unsigned long pg_iobits;
220extern unsigned long _PAGE_ALL_SZ_BITS;
221extern unsigned long _PAGE_SZBITS;
222
223extern struct page *mem_map_zero;
224#define ZERO_PAGE(vaddr) (mem_map_zero)
225
226/* PFNs are real physical page numbers. However, mem_map only begins to record
227 * per-page information starting at pfn_base. This is to handle systems where
228 * the first physical page in the machine is at some huge physical address,
229 * such as 4GB. This is common on a partitioned E10000, for example.
230 */
231static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
232{
233 unsigned long paddr = pfn << PAGE_SHIFT;
234 unsigned long sz_bits;
235
236 sz_bits = 0UL;
237 if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) {
238 __asm__ __volatile__(
239 "\n661: sethi %%uhi(%1), %0\n"
240 " sllx %0, 32, %0\n"
241 " .section .sun4v_2insn_patch, \"ax\"\n"
242 " .word 661b\n"
243 " mov %2, %0\n"
244 " nop\n"
245 " .previous\n"
246 : "=r" (sz_bits)
247 : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V));
248 }
249 return __pte(paddr | sz_bits | pgprot_val(prot));
250}
251#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
252
253/* This one can be done with two shifts. */
254static inline unsigned long pte_pfn(pte_t pte)
255{
256 unsigned long ret;
257
258 __asm__ __volatile__(
259 "\n661: sllx %1, %2, %0\n"
260 " srlx %0, %3, %0\n"
261 " .section .sun4v_2insn_patch, \"ax\"\n"
262 " .word 661b\n"
263 " sllx %1, %4, %0\n"
264 " srlx %0, %5, %0\n"
265 " .previous\n"
266 : "=r" (ret)
267 : "r" (pte_val(pte)),
268 "i" (21), "i" (21 + PAGE_SHIFT),
269 "i" (8), "i" (8 + PAGE_SHIFT));
270
271 return ret;
272}
273#define pte_page(x) pfn_to_page(pte_pfn(x))
274
275static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
276{
277 unsigned long mask, tmp;
278
279 /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347)
280 * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8)
281 *
282 * Even if we use negation tricks the result is still a 6
283 * instruction sequence, so don't try to play fancy and just
284 * do the most straightforward implementation.
285 *
286 * Note: We encode this into 3 sun4v 2-insn patch sequences.
287 */
288
289 __asm__ __volatile__(
290 "\n661: sethi %%uhi(%2), %1\n"
291 " sethi %%hi(%2), %0\n"
292 "\n662: or %1, %%ulo(%2), %1\n"
293 " or %0, %%lo(%2), %0\n"
294 "\n663: sllx %1, 32, %1\n"
295 " or %0, %1, %0\n"
296 " .section .sun4v_2insn_patch, \"ax\"\n"
297 " .word 661b\n"
298 " sethi %%uhi(%3), %1\n"
299 " sethi %%hi(%3), %0\n"
300 " .word 662b\n"
301 " or %1, %%ulo(%3), %1\n"
302 " or %0, %%lo(%3), %0\n"
303 " .word 663b\n"
304 " sllx %1, 32, %1\n"
305 " or %0, %1, %0\n"
306 " .previous\n"
307 : "=r" (mask), "=r" (tmp)
308 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
309 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U |
310 _PAGE_SZBITS_4U | _PAGE_SPECIAL),
311 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
312 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V |
313 _PAGE_SZBITS_4V | _PAGE_SPECIAL));
314
315 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
316}
317
318static inline pte_t pgoff_to_pte(unsigned long off)
319{
320 off <<= PAGE_SHIFT;
321
322 __asm__ __volatile__(
323 "\n661: or %0, %2, %0\n"
324 " .section .sun4v_1insn_patch, \"ax\"\n"
325 " .word 661b\n"
326 " or %0, %3, %0\n"
327 " .previous\n"
328 : "=r" (off)
329 : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
330
331 return __pte(off);
332}
333
334static inline pgprot_t pgprot_noncached(pgprot_t prot)
335{
336 unsigned long val = pgprot_val(prot);
337
338 __asm__ __volatile__(
339 "\n661: andn %0, %2, %0\n"
340 " or %0, %3, %0\n"
341 " .section .sun4v_2insn_patch, \"ax\"\n"
342 " .word 661b\n"
343 " andn %0, %4, %0\n"
344 " or %0, %5, %0\n"
345 " .previous\n"
346 : "=r" (val)
347 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
348 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V));
349
350 return __pgprot(val);
351}
352/* Various pieces of code check for platform support by ifdef testing
353 * on "pgprot_noncached". That's broken and should be fixed, but for
354 * now...
355 */
356#define pgprot_noncached pgprot_noncached
357
358#ifdef CONFIG_HUGETLB_PAGE
359static inline pte_t pte_mkhuge(pte_t pte)
360{
361 unsigned long mask;
362
363 __asm__ __volatile__(
364 "\n661: sethi %%uhi(%1), %0\n"
365 " sllx %0, 32, %0\n"
366 " .section .sun4v_2insn_patch, \"ax\"\n"
367 " .word 661b\n"
368 " mov %2, %0\n"
369 " nop\n"
370 " .previous\n"
371 : "=r" (mask)
372 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
373
374 return __pte(pte_val(pte) | mask);
375}
376#endif
377
378static inline pte_t pte_mkdirty(pte_t pte)
379{
380 unsigned long val = pte_val(pte), tmp;
381
382 __asm__ __volatile__(
383 "\n661: or %0, %3, %0\n"
384 " nop\n"
385 "\n662: nop\n"
386 " nop\n"
387 " .section .sun4v_2insn_patch, \"ax\"\n"
388 " .word 661b\n"
389 " sethi %%uhi(%4), %1\n"
390 " sllx %1, 32, %1\n"
391 " .word 662b\n"
392 " or %1, %%lo(%4), %1\n"
393 " or %0, %1, %0\n"
394 " .previous\n"
395 : "=r" (val), "=r" (tmp)
396 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
397 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
398
399 return __pte(val);
400}
401
402static inline pte_t pte_mkclean(pte_t pte)
403{
404 unsigned long val = pte_val(pte), tmp;
405
406 __asm__ __volatile__(
407 "\n661: andn %0, %3, %0\n"
408 " nop\n"
409 "\n662: nop\n"
410 " nop\n"
411 " .section .sun4v_2insn_patch, \"ax\"\n"
412 " .word 661b\n"
413 " sethi %%uhi(%4), %1\n"
414 " sllx %1, 32, %1\n"
415 " .word 662b\n"
416 " or %1, %%lo(%4), %1\n"
417 " andn %0, %1, %0\n"
418 " .previous\n"
419 : "=r" (val), "=r" (tmp)
420 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
421 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
422
423 return __pte(val);
424}
425
426static inline pte_t pte_mkwrite(pte_t pte)
427{
428 unsigned long val = pte_val(pte), mask;
429
430 __asm__ __volatile__(
431 "\n661: mov %1, %0\n"
432 " nop\n"
433 " .section .sun4v_2insn_patch, \"ax\"\n"
434 " .word 661b\n"
435 " sethi %%uhi(%2), %0\n"
436 " sllx %0, 32, %0\n"
437 " .previous\n"
438 : "=r" (mask)
439 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
440
441 return __pte(val | mask);
442}
443
444static inline pte_t pte_wrprotect(pte_t pte)
445{
446 unsigned long val = pte_val(pte), tmp;
447
448 __asm__ __volatile__(
449 "\n661: andn %0, %3, %0\n"
450 " nop\n"
451 "\n662: nop\n"
452 " nop\n"
453 " .section .sun4v_2insn_patch, \"ax\"\n"
454 " .word 661b\n"
455 " sethi %%uhi(%4), %1\n"
456 " sllx %1, 32, %1\n"
457 " .word 662b\n"
458 " or %1, %%lo(%4), %1\n"
459 " andn %0, %1, %0\n"
460 " .previous\n"
461 : "=r" (val), "=r" (tmp)
462 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
463 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
464
465 return __pte(val);
466}
467
468static inline pte_t pte_mkold(pte_t pte)
469{
470 unsigned long mask;
471
472 __asm__ __volatile__(
473 "\n661: mov %1, %0\n"
474 " nop\n"
475 " .section .sun4v_2insn_patch, \"ax\"\n"
476 " .word 661b\n"
477 " sethi %%uhi(%2), %0\n"
478 " sllx %0, 32, %0\n"
479 " .previous\n"
480 : "=r" (mask)
481 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
482
483 mask |= _PAGE_R;
484
485 return __pte(pte_val(pte) & ~mask);
486}
487
488static inline pte_t pte_mkyoung(pte_t pte)
489{
490 unsigned long mask;
491
492 __asm__ __volatile__(
493 "\n661: mov %1, %0\n"
494 " nop\n"
495 " .section .sun4v_2insn_patch, \"ax\"\n"
496 " .word 661b\n"
497 " sethi %%uhi(%2), %0\n"
498 " sllx %0, 32, %0\n"
499 " .previous\n"
500 : "=r" (mask)
501 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
502
503 mask |= _PAGE_R;
504
505 return __pte(pte_val(pte) | mask);
506}
507
508static inline pte_t pte_mkspecial(pte_t pte)
509{
510 pte_val(pte) |= _PAGE_SPECIAL;
511 return pte;
512}
513
514static inline unsigned long pte_young(pte_t pte)
515{
516 unsigned long mask;
517
518 __asm__ __volatile__(
519 "\n661: mov %1, %0\n"
520 " nop\n"
521 " .section .sun4v_2insn_patch, \"ax\"\n"
522 " .word 661b\n"
523 " sethi %%uhi(%2), %0\n"
524 " sllx %0, 32, %0\n"
525 " .previous\n"
526 : "=r" (mask)
527 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
528
529 return (pte_val(pte) & mask);
530}
531
532static inline unsigned long pte_dirty(pte_t pte)
533{
534 unsigned long mask;
535
536 __asm__ __volatile__(
537 "\n661: mov %1, %0\n"
538 " nop\n"
539 " .section .sun4v_2insn_patch, \"ax\"\n"
540 " .word 661b\n"
541 " sethi %%uhi(%2), %0\n"
542 " sllx %0, 32, %0\n"
543 " .previous\n"
544 : "=r" (mask)
545 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
546
547 return (pte_val(pte) & mask);
548}
549
550static inline unsigned long pte_write(pte_t pte)
551{
552 unsigned long mask;
553
554 __asm__ __volatile__(
555 "\n661: mov %1, %0\n"
556 " nop\n"
557 " .section .sun4v_2insn_patch, \"ax\"\n"
558 " .word 661b\n"
559 " sethi %%uhi(%2), %0\n"
560 " sllx %0, 32, %0\n"
561 " .previous\n"
562 : "=r" (mask)
563 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
564
565 return (pte_val(pte) & mask);
566}
567
568static inline unsigned long pte_exec(pte_t pte)
569{
570 unsigned long mask;
571
572 __asm__ __volatile__(
573 "\n661: sethi %%hi(%1), %0\n"
574 " .section .sun4v_1insn_patch, \"ax\"\n"
575 " .word 661b\n"
576 " mov %2, %0\n"
577 " .previous\n"
578 : "=r" (mask)
579 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
580
581 return (pte_val(pte) & mask);
582}
583
584static inline unsigned long pte_file(pte_t pte)
585{
586 unsigned long val = pte_val(pte);
587
588 __asm__ __volatile__(
589 "\n661: and %0, %2, %0\n"
590 " .section .sun4v_1insn_patch, \"ax\"\n"
591 " .word 661b\n"
592 " and %0, %3, %0\n"
593 " .previous\n"
594 : "=r" (val)
595 : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
596
597 return val;
598}
599
600static inline unsigned long pte_present(pte_t pte)
601{
602 unsigned long val = pte_val(pte);
603
604 __asm__ __volatile__(
605 "\n661: and %0, %2, %0\n"
606 " .section .sun4v_1insn_patch, \"ax\"\n"
607 " .word 661b\n"
608 " and %0, %3, %0\n"
609 " .previous\n"
610 : "=r" (val)
611 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
612
613 return val;
614}
615
616static inline unsigned long pte_special(pte_t pte)
617{
618 return pte_val(pte) & _PAGE_SPECIAL;
619}
620
621#define pmd_set(pmdp, ptep) \
622 (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
623#define pud_set(pudp, pmdp) \
624 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL))
625#define __pmd_page(pmd) \
626 ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL)))
627#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
628#define pud_page_vaddr(pud) \
629 ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
630#define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud))
631#define pmd_none(pmd) (!pmd_val(pmd))
632#define pmd_bad(pmd) (0)
633#define pmd_present(pmd) (pmd_val(pmd) != 0U)
634#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U)
635#define pud_none(pud) (!pud_val(pud))
636#define pud_bad(pud) (0)
637#define pud_present(pud) (pud_val(pud) != 0U)
638#define pud_clear(pudp) (pud_val(*(pudp)) = 0U)
639
640/* Same in both SUN4V and SUN4U. */
641#define pte_none(pte) (!pte_val(pte))
642
643/* to find an entry in a page-table-directory. */
644#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
645#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
646
647/* to find an entry in a kernel page-table-directory */
648#define pgd_offset_k(address) pgd_offset(&init_mm, address)
649
650/* Find an entry in the second-level page table.. */
651#define pmd_offset(pudp, address) \
652 ((pmd_t *) pud_page_vaddr(*(pudp)) + \
653 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
654
655/* Find an entry in the third-level page table.. */
656#define pte_index(dir, address) \
657 ((pte_t *) __pmd_page(*(dir)) + \
658 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
659#define pte_offset_kernel pte_index
660#define pte_offset_map pte_index
661#define pte_unmap(pte) do { } while (0)
662
663/* Actual page table PTE updates. */
664extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
665 pte_t *ptep, pte_t orig, int fullmm);
666
667static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
668 pte_t *ptep, pte_t pte, int fullmm)
669{
670 pte_t orig = *ptep;
671
672 *ptep = pte;
673
674 /* It is more efficient to let flush_tlb_kernel_range()
675 * handle init_mm tlb flushes.
676 *
677 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
678 * and SUN4V pte layout, so this inline test is fine.
679 */
680 if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID))
681 tlb_batch_add(mm, addr, ptep, orig, fullmm);
682}
683
684#define set_pte_at(mm,addr,ptep,pte) \
685 __set_pte_at((mm), (addr), (ptep), (pte), 0)
686
687#define pte_clear(mm,addr,ptep) \
688 set_pte_at((mm), (addr), (ptep), __pte(0UL))
689
690#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
691#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
692 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
693
694#ifdef DCACHE_ALIASING_POSSIBLE
695#define __HAVE_ARCH_MOVE_PTE
696#define move_pte(pte, prot, old_addr, new_addr) \
697({ \
698 pte_t newpte = (pte); \
699 if (tlb_type != hypervisor && pte_present(pte)) { \
700 unsigned long this_pfn = pte_pfn(pte); \
701 \
702 if (pfn_valid(this_pfn) && \
703 (((old_addr) ^ (new_addr)) & (1 << 13))) \
704 flush_dcache_page_all(current->mm, \
705 pfn_to_page(this_pfn)); \
706 } \
707 newpte; \
708})
709#endif
710
711extern pgd_t swapper_pg_dir[2048];
712extern pmd_t swapper_low_pmd_dir[2048];
713
714extern void paging_init(void);
715extern unsigned long find_ecache_flush_span(unsigned long size);
716
717struct seq_file;
718extern void mmu_info(struct seq_file *);
719
720struct vm_area_struct;
721extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
722
723/* Encode and de-code a swap entry */
724#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
725#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
726#define __swp_entry(type, offset) \
727 ( (swp_entry_t) \
728 { \
729 (((long)(type) << PAGE_SHIFT) | \
730 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
731 } )
732#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
733#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
734
735/* File offset in PTE support. */
736extern unsigned long pte_file(pte_t);
737#define pte_to_pgoff(pte) (pte_val(pte) >> PAGE_SHIFT)
738extern pte_t pgoff_to_pte(unsigned long);
739#define PTE_FILE_MAX_BITS (64UL - PAGE_SHIFT - 1UL)
740
741extern unsigned long sparc64_valid_addr_bitmap[];
742
743/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
744static inline bool kern_addr_valid(unsigned long addr)
745{
746 unsigned long paddr = __pa(addr);
747
748 if ((paddr >> 41UL) != 0UL)
749 return false;
750 return test_bit(paddr >> 22, sparc64_valid_addr_bitmap);
751}
752
753extern int page_in_phys_avail(unsigned long paddr);
754
755/*
756 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
757 * its high 4 bits. These macros/functions put it there or get it from there.
758 */
759#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
760#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
761#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
762
763extern int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
764 unsigned long, pgprot_t);
765
766static inline int io_remap_pfn_range(struct vm_area_struct *vma,
767 unsigned long from, unsigned long pfn,
768 unsigned long size, pgprot_t prot)
769{
770 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
771 int space = GET_IOSPACE(pfn);
772 unsigned long phys_base;
773
774 phys_base = offset | (((unsigned long) space) << 32UL);
775
776 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
777}
778
779#include <asm-generic/pgtable.h>
780
781/* We provide our own get_unmapped_area to cope with VA holes and
782 * SHM area cache aliasing for userland.
783 */
784#define HAVE_ARCH_UNMAPPED_AREA
785#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
786
787/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
788 * the largest alignment possible such that larget PTEs can be used.
789 */
790extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
791 unsigned long, unsigned long,
792 unsigned long);
793#define HAVE_ARCH_FB_UNMAPPED_AREA
794
795extern void pgtable_cache_init(void);
796extern void sun4v_register_fault_status(void);
797extern void sun4v_ktsb_register(void);
798extern void __init cheetah_ecache_flush_init(void);
799extern void sun4v_patch_tlb_handlers(void);
800
801extern unsigned long cmdline_memory_size;
802
803extern asmlinkage void do_sparc64_fault(struct pt_regs *regs);
804
805#endif /* !(__ASSEMBLY__) */
806
807#endif /* !(_SPARC64_PGTABLE_H) */