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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 <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 0x6000000 (4MB --> 96MB).
27 * The page copy blockops can use 0x6000000 to 0x8000000.
28 * The TSB is mapped in the 0x8000000 to 0xa000000 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(0x0000000006000000,UL)
37#define TSBMAP_BASE _AC(0x0000000008000000,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(0x0000010000000000,UL)
45#define VMEMMAP_BASE _AC(0x0000010000000000,UL)
46
47#define vmemmap ((struct page *)VMEMMAP_BASE)
48
49/* XXX All of this needs to be rethought so we can take advantage
50 * XXX cheetah's full 64-bit virtual address space, ie. no more hole
51 * XXX in the middle like on spitfire. -DaveM
52 */
53/*
54 * Given a virtual address, the lowest PAGE_SHIFT bits determine offset
55 * into the page; the next higher PAGE_SHIFT-3 bits determine the pte#
56 * in the proper pagetable (the -3 is from the 8 byte ptes, and each page
57 * table is a single page long). The next higher PMD_BITS determine pmd#
58 * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2)
59 * since the pmd entries are 4 bytes, and each pmd page is a single page
60 * long). Finally, the higher few bits determine pgde#.
61 */
62
63/* PMD_SHIFT determines the size of the area a second-level page
64 * table can map
65 */
66#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
67#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
68#define PMD_MASK (~(PMD_SIZE-1))
69#define PMD_BITS (PAGE_SHIFT - 2)
70
71/* PGDIR_SHIFT determines what a third-level page table entry can map */
72#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS)
73#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
74#define PGDIR_MASK (~(PGDIR_SIZE-1))
75#define PGDIR_BITS (PAGE_SHIFT - 2)
76
77#ifndef __ASSEMBLY__
78
79#include <linux/sched.h>
80
81/* Entries per page directory level. */
82#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
83#define PTRS_PER_PMD (1UL << PMD_BITS)
84#define PTRS_PER_PGD (1UL << PGDIR_BITS)
85
86/* Kernel has a separate 44bit address space. */
87#define FIRST_USER_ADDRESS 0
88
89#define pte_ERROR(e) __builtin_trap()
90#define pmd_ERROR(e) __builtin_trap()
91#define pgd_ERROR(e) __builtin_trap()
92
93#endif /* !(__ASSEMBLY__) */
94
95/* PTE bits which are the same in SUN4U and SUN4V format. */
96#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
97#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
98#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */
99
100/* Advertise support for _PAGE_SPECIAL */
101#define __HAVE_ARCH_PTE_SPECIAL
102
103/* SUN4U pte bits... */
104#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
105#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
106#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
107#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
108#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
109#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
110#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
111#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */
112#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
113#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
114#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
115#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
116#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
117#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
118#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
119#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
120#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
121#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
122#define _PAGE_FILE_4U _AC(0x0000000000000800,UL) /* Pagecache page */
123#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
124#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
125#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
126#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
127#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
128#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
129#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
130#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
131#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
132#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
133
134/* SUN4V pte bits... */
135#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
136#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
137#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
138#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
139#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
140#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
141#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */
142#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
143#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
144#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
145#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
146#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
147#define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */
148#define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */
149#define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */
150#define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */
151#define _PAGE_FILE_4V _AC(0x0000000000000020,UL) /* Pagecache page */
152#define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */
153#define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */
154#define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */
155#define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */
156#define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */
157#define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */
158#define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */
159#define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */
160#define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */
161#define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */
162#define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */
163
164#if PAGE_SHIFT == 13
165#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
166#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
167#elif PAGE_SHIFT == 16
168#define _PAGE_SZBITS_4U _PAGE_SZ64K_4U
169#define _PAGE_SZBITS_4V _PAGE_SZ64K_4V
170#else
171#error Wrong PAGE_SHIFT specified
172#endif
173
174#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
175#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
176#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
177#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
178#define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U
179#define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V
180#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
181#define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U
182#define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V
183#endif
184
185/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
186#define __P000 __pgprot(0)
187#define __P001 __pgprot(0)
188#define __P010 __pgprot(0)
189#define __P011 __pgprot(0)
190#define __P100 __pgprot(0)
191#define __P101 __pgprot(0)
192#define __P110 __pgprot(0)
193#define __P111 __pgprot(0)
194
195#define __S000 __pgprot(0)
196#define __S001 __pgprot(0)
197#define __S010 __pgprot(0)
198#define __S011 __pgprot(0)
199#define __S100 __pgprot(0)
200#define __S101 __pgprot(0)
201#define __S110 __pgprot(0)
202#define __S111 __pgprot(0)
203
204#ifndef __ASSEMBLY__
205
206extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
207
208extern unsigned long pte_sz_bits(unsigned long size);
209
210extern pgprot_t PAGE_KERNEL;
211extern pgprot_t PAGE_KERNEL_LOCKED;
212extern pgprot_t PAGE_COPY;
213extern pgprot_t PAGE_SHARED;
214
215/* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
216extern unsigned long _PAGE_IE;
217extern unsigned long _PAGE_E;
218extern unsigned long _PAGE_CACHE;
219
220extern unsigned long pg_iobits;
221extern unsigned long _PAGE_ALL_SZ_BITS;
222extern unsigned long _PAGE_SZBITS;
223
224extern struct page *mem_map_zero;
225#define ZERO_PAGE(vaddr) (mem_map_zero)
226
227/* PFNs are real physical page numbers. However, mem_map only begins to record
228 * per-page information starting at pfn_base. This is to handle systems where
229 * the first physical page in the machine is at some huge physical address,
230 * such as 4GB. This is common on a partitioned E10000, for example.
231 */
232static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
233{
234 unsigned long paddr = pfn << PAGE_SHIFT;
235 unsigned long sz_bits;
236
237 sz_bits = 0UL;
238 if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) {
239 __asm__ __volatile__(
240 "\n661: sethi %%uhi(%1), %0\n"
241 " sllx %0, 32, %0\n"
242 " .section .sun4v_2insn_patch, \"ax\"\n"
243 " .word 661b\n"
244 " mov %2, %0\n"
245 " nop\n"
246 " .previous\n"
247 : "=r" (sz_bits)
248 : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V));
249 }
250 return __pte(paddr | sz_bits | pgprot_val(prot));
251}
252#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
253
254/* This one can be done with two shifts. */
255static inline unsigned long pte_pfn(pte_t pte)
256{
257 unsigned long ret;
258
259 __asm__ __volatile__(
260 "\n661: sllx %1, %2, %0\n"
261 " srlx %0, %3, %0\n"
262 " .section .sun4v_2insn_patch, \"ax\"\n"
263 " .word 661b\n"
264 " sllx %1, %4, %0\n"
265 " srlx %0, %5, %0\n"
266 " .previous\n"
267 : "=r" (ret)
268 : "r" (pte_val(pte)),
269 "i" (21), "i" (21 + PAGE_SHIFT),
270 "i" (8), "i" (8 + PAGE_SHIFT));
271
272 return ret;
273}
274#define pte_page(x) pfn_to_page(pte_pfn(x))
275
276static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
277{
278 unsigned long mask, tmp;
279
280 /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347)
281 * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8)
282 *
283 * Even if we use negation tricks the result is still a 6
284 * instruction sequence, so don't try to play fancy and just
285 * do the most straightforward implementation.
286 *
287 * Note: We encode this into 3 sun4v 2-insn patch sequences.
288 */
289
290 __asm__ __volatile__(
291 "\n661: sethi %%uhi(%2), %1\n"
292 " sethi %%hi(%2), %0\n"
293 "\n662: or %1, %%ulo(%2), %1\n"
294 " or %0, %%lo(%2), %0\n"
295 "\n663: sllx %1, 32, %1\n"
296 " or %0, %1, %0\n"
297 " .section .sun4v_2insn_patch, \"ax\"\n"
298 " .word 661b\n"
299 " sethi %%uhi(%3), %1\n"
300 " sethi %%hi(%3), %0\n"
301 " .word 662b\n"
302 " or %1, %%ulo(%3), %1\n"
303 " or %0, %%lo(%3), %0\n"
304 " .word 663b\n"
305 " sllx %1, 32, %1\n"
306 " or %0, %1, %0\n"
307 " .previous\n"
308 : "=r" (mask), "=r" (tmp)
309 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
310 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U |
311 _PAGE_SZBITS_4U | _PAGE_SPECIAL),
312 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
313 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V |
314 _PAGE_SZBITS_4V | _PAGE_SPECIAL));
315
316 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
317}
318
319static inline pte_t pgoff_to_pte(unsigned long off)
320{
321 off <<= PAGE_SHIFT;
322
323 __asm__ __volatile__(
324 "\n661: or %0, %2, %0\n"
325 " .section .sun4v_1insn_patch, \"ax\"\n"
326 " .word 661b\n"
327 " or %0, %3, %0\n"
328 " .previous\n"
329 : "=r" (off)
330 : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
331
332 return __pte(off);
333}
334
335static inline pgprot_t pgprot_noncached(pgprot_t prot)
336{
337 unsigned long val = pgprot_val(prot);
338
339 __asm__ __volatile__(
340 "\n661: andn %0, %2, %0\n"
341 " or %0, %3, %0\n"
342 " .section .sun4v_2insn_patch, \"ax\"\n"
343 " .word 661b\n"
344 " andn %0, %4, %0\n"
345 " or %0, %5, %0\n"
346 " .previous\n"
347 : "=r" (val)
348 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
349 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V));
350
351 return __pgprot(val);
352}
353/* Various pieces of code check for platform support by ifdef testing
354 * on "pgprot_noncached". That's broken and should be fixed, but for
355 * now...
356 */
357#define pgprot_noncached pgprot_noncached
358
359#ifdef CONFIG_HUGETLB_PAGE
360static inline pte_t pte_mkhuge(pte_t pte)
361{
362 unsigned long mask;
363
364 __asm__ __volatile__(
365 "\n661: sethi %%uhi(%1), %0\n"
366 " sllx %0, 32, %0\n"
367 " .section .sun4v_2insn_patch, \"ax\"\n"
368 " .word 661b\n"
369 " mov %2, %0\n"
370 " nop\n"
371 " .previous\n"
372 : "=r" (mask)
373 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
374
375 return __pte(pte_val(pte) | mask);
376}
377#endif
378
379static inline pte_t pte_mkdirty(pte_t pte)
380{
381 unsigned long val = pte_val(pte), tmp;
382
383 __asm__ __volatile__(
384 "\n661: or %0, %3, %0\n"
385 " nop\n"
386 "\n662: nop\n"
387 " nop\n"
388 " .section .sun4v_2insn_patch, \"ax\"\n"
389 " .word 661b\n"
390 " sethi %%uhi(%4), %1\n"
391 " sllx %1, 32, %1\n"
392 " .word 662b\n"
393 " or %1, %%lo(%4), %1\n"
394 " or %0, %1, %0\n"
395 " .previous\n"
396 : "=r" (val), "=r" (tmp)
397 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
398 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
399
400 return __pte(val);
401}
402
403static inline pte_t pte_mkclean(pte_t pte)
404{
405 unsigned long val = pte_val(pte), tmp;
406
407 __asm__ __volatile__(
408 "\n661: andn %0, %3, %0\n"
409 " nop\n"
410 "\n662: nop\n"
411 " nop\n"
412 " .section .sun4v_2insn_patch, \"ax\"\n"
413 " .word 661b\n"
414 " sethi %%uhi(%4), %1\n"
415 " sllx %1, 32, %1\n"
416 " .word 662b\n"
417 " or %1, %%lo(%4), %1\n"
418 " andn %0, %1, %0\n"
419 " .previous\n"
420 : "=r" (val), "=r" (tmp)
421 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
422 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
423
424 return __pte(val);
425}
426
427static inline pte_t pte_mkwrite(pte_t pte)
428{
429 unsigned long val = pte_val(pte), mask;
430
431 __asm__ __volatile__(
432 "\n661: mov %1, %0\n"
433 " nop\n"
434 " .section .sun4v_2insn_patch, \"ax\"\n"
435 " .word 661b\n"
436 " sethi %%uhi(%2), %0\n"
437 " sllx %0, 32, %0\n"
438 " .previous\n"
439 : "=r" (mask)
440 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
441
442 return __pte(val | mask);
443}
444
445static inline pte_t pte_wrprotect(pte_t pte)
446{
447 unsigned long val = pte_val(pte), tmp;
448
449 __asm__ __volatile__(
450 "\n661: andn %0, %3, %0\n"
451 " nop\n"
452 "\n662: nop\n"
453 " nop\n"
454 " .section .sun4v_2insn_patch, \"ax\"\n"
455 " .word 661b\n"
456 " sethi %%uhi(%4), %1\n"
457 " sllx %1, 32, %1\n"
458 " .word 662b\n"
459 " or %1, %%lo(%4), %1\n"
460 " andn %0, %1, %0\n"
461 " .previous\n"
462 : "=r" (val), "=r" (tmp)
463 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
464 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
465
466 return __pte(val);
467}
468
469static inline pte_t pte_mkold(pte_t pte)
470{
471 unsigned long mask;
472
473 __asm__ __volatile__(
474 "\n661: mov %1, %0\n"
475 " nop\n"
476 " .section .sun4v_2insn_patch, \"ax\"\n"
477 " .word 661b\n"
478 " sethi %%uhi(%2), %0\n"
479 " sllx %0, 32, %0\n"
480 " .previous\n"
481 : "=r" (mask)
482 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
483
484 mask |= _PAGE_R;
485
486 return __pte(pte_val(pte) & ~mask);
487}
488
489static inline pte_t pte_mkyoung(pte_t pte)
490{
491 unsigned long mask;
492
493 __asm__ __volatile__(
494 "\n661: mov %1, %0\n"
495 " nop\n"
496 " .section .sun4v_2insn_patch, \"ax\"\n"
497 " .word 661b\n"
498 " sethi %%uhi(%2), %0\n"
499 " sllx %0, 32, %0\n"
500 " .previous\n"
501 : "=r" (mask)
502 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
503
504 mask |= _PAGE_R;
505
506 return __pte(pte_val(pte) | mask);
507}
508
509static inline pte_t pte_mkspecial(pte_t pte)
510{
511 pte_val(pte) |= _PAGE_SPECIAL;
512 return pte;
513}
514
515static inline unsigned long pte_young(pte_t pte)
516{
517 unsigned long mask;
518
519 __asm__ __volatile__(
520 "\n661: mov %1, %0\n"
521 " nop\n"
522 " .section .sun4v_2insn_patch, \"ax\"\n"
523 " .word 661b\n"
524 " sethi %%uhi(%2), %0\n"
525 " sllx %0, 32, %0\n"
526 " .previous\n"
527 : "=r" (mask)
528 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
529
530 return (pte_val(pte) & mask);
531}
532
533static inline unsigned long pte_dirty(pte_t pte)
534{
535 unsigned long mask;
536
537 __asm__ __volatile__(
538 "\n661: mov %1, %0\n"
539 " nop\n"
540 " .section .sun4v_2insn_patch, \"ax\"\n"
541 " .word 661b\n"
542 " sethi %%uhi(%2), %0\n"
543 " sllx %0, 32, %0\n"
544 " .previous\n"
545 : "=r" (mask)
546 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
547
548 return (pte_val(pte) & mask);
549}
550
551static inline unsigned long pte_write(pte_t pte)
552{
553 unsigned long mask;
554
555 __asm__ __volatile__(
556 "\n661: mov %1, %0\n"
557 " nop\n"
558 " .section .sun4v_2insn_patch, \"ax\"\n"
559 " .word 661b\n"
560 " sethi %%uhi(%2), %0\n"
561 " sllx %0, 32, %0\n"
562 " .previous\n"
563 : "=r" (mask)
564 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
565
566 return (pte_val(pte) & mask);
567}
568
569static inline unsigned long pte_exec(pte_t pte)
570{
571 unsigned long mask;
572
573 __asm__ __volatile__(
574 "\n661: sethi %%hi(%1), %0\n"
575 " .section .sun4v_1insn_patch, \"ax\"\n"
576 " .word 661b\n"
577 " mov %2, %0\n"
578 " .previous\n"
579 : "=r" (mask)
580 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
581
582 return (pte_val(pte) & mask);
583}
584
585static inline unsigned long pte_file(pte_t pte)
586{
587 unsigned long val = pte_val(pte);
588
589 __asm__ __volatile__(
590 "\n661: and %0, %2, %0\n"
591 " .section .sun4v_1insn_patch, \"ax\"\n"
592 " .word 661b\n"
593 " and %0, %3, %0\n"
594 " .previous\n"
595 : "=r" (val)
596 : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
597
598 return val;
599}
600
601static inline unsigned long pte_present(pte_t pte)
602{
603 unsigned long val = pte_val(pte);
604
605 __asm__ __volatile__(
606 "\n661: and %0, %2, %0\n"
607 " .section .sun4v_1insn_patch, \"ax\"\n"
608 " .word 661b\n"
609 " and %0, %3, %0\n"
610 " .previous\n"
611 : "=r" (val)
612 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
613
614 return val;
615}
616
617static inline unsigned long pte_special(pte_t pte)
618{
619 return pte_val(pte) & _PAGE_SPECIAL;
620}
621
622#define pmd_set(pmdp, ptep) \
623 (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
624#define pud_set(pudp, pmdp) \
625 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL))
626#define __pmd_page(pmd) \
627 ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL)))
628#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
629#define pud_page_vaddr(pud) \
630 ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
631#define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud))
632#define pmd_none(pmd) (!pmd_val(pmd))
633#define pmd_bad(pmd) (0)
634#define pmd_present(pmd) (pmd_val(pmd) != 0U)
635#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U)
636#define pud_none(pud) (!pud_val(pud))
637#define pud_bad(pud) (0)
638#define pud_present(pud) (pud_val(pud) != 0U)
639#define pud_clear(pudp) (pud_val(*(pudp)) = 0U)
640
641/* Same in both SUN4V and SUN4U. */
642#define pte_none(pte) (!pte_val(pte))
643
644/* to find an entry in a page-table-directory. */
645#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
646#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
647
648/* to find an entry in a kernel page-table-directory */
649#define pgd_offset_k(address) pgd_offset(&init_mm, address)
650
651/* Find an entry in the second-level page table.. */
652#define pmd_offset(pudp, address) \
653 ((pmd_t *) pud_page_vaddr(*(pudp)) + \
654 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
655
656/* Find an entry in the third-level page table.. */
657#define pte_index(dir, address) \
658 ((pte_t *) __pmd_page(*(dir)) + \
659 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
660#define pte_offset_kernel pte_index
661#define pte_offset_map pte_index
662#define pte_unmap(pte) do { } while (0)
663
664/* Actual page table PTE updates. */
665extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
666 pte_t *ptep, pte_t orig, int fullmm);
667
668static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
669 pte_t *ptep, pte_t pte, int fullmm)
670{
671 pte_t orig = *ptep;
672
673 *ptep = pte;
674
675 /* It is more efficient to let flush_tlb_kernel_range()
676 * handle init_mm tlb flushes.
677 *
678 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
679 * and SUN4V pte layout, so this inline test is fine.
680 */
681 if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID))
682 tlb_batch_add(mm, addr, ptep, orig, fullmm);
683}
684
685#define set_pte_at(mm,addr,ptep,pte) \
686 __set_pte_at((mm), (addr), (ptep), (pte), 0)
687
688#define pte_clear(mm,addr,ptep) \
689 set_pte_at((mm), (addr), (ptep), __pte(0UL))
690
691#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
692#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
693 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
694
695#ifdef DCACHE_ALIASING_POSSIBLE
696#define __HAVE_ARCH_MOVE_PTE
697#define move_pte(pte, prot, old_addr, new_addr) \
698({ \
699 pte_t newpte = (pte); \
700 if (tlb_type != hypervisor && pte_present(pte)) { \
701 unsigned long this_pfn = pte_pfn(pte); \
702 \
703 if (pfn_valid(this_pfn) && \
704 (((old_addr) ^ (new_addr)) & (1 << 13))) \
705 flush_dcache_page_all(current->mm, \
706 pfn_to_page(this_pfn)); \
707 } \
708 newpte; \
709})
710#endif
711
712extern pgd_t swapper_pg_dir[2048];
713extern pmd_t swapper_low_pmd_dir[2048];
714
715extern void paging_init(void);
716extern unsigned long find_ecache_flush_span(unsigned long size);
717
718struct seq_file;
719extern void mmu_info(struct seq_file *);
720
721/* These do nothing with the way I have things setup. */
722#define mmu_lockarea(vaddr, len) (vaddr)
723#define mmu_unlockarea(vaddr, len) do { } while(0)
724
725struct vm_area_struct;
726extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
727
728/* Encode and de-code a swap entry */
729#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
730#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
731#define __swp_entry(type, offset) \
732 ( (swp_entry_t) \
733 { \
734 (((long)(type) << PAGE_SHIFT) | \
735 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
736 } )
737#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
738#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
739
740/* File offset in PTE support. */
741extern unsigned long pte_file(pte_t);
742#define pte_to_pgoff(pte) (pte_val(pte) >> PAGE_SHIFT)
743extern pte_t pgoff_to_pte(unsigned long);
744#define PTE_FILE_MAX_BITS (64UL - PAGE_SHIFT - 1UL)
745
746extern unsigned long sparc64_valid_addr_bitmap[];
747
748/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
749static inline bool kern_addr_valid(unsigned long addr)
750{
751 unsigned long paddr = __pa(addr);
752
753 if ((paddr >> 41UL) != 0UL)
754 return false;
755 return test_bit(paddr >> 22, sparc64_valid_addr_bitmap);
756}
757
758extern int page_in_phys_avail(unsigned long paddr);
759
760extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
761 unsigned long pfn,
762 unsigned long size, pgprot_t prot);
763
764/*
765 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
766 * its high 4 bits. These macros/functions put it there or get it from there.
767 */
768#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
769#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
770#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
771
772#include <asm-generic/pgtable.h>
773
774/* We provide our own get_unmapped_area to cope with VA holes and
775 * SHM area cache aliasing for userland.
776 */
777#define HAVE_ARCH_UNMAPPED_AREA
778#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
779
780/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
781 * the largest alignment possible such that larget PTEs can be used.
782 */
783extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
784 unsigned long, unsigned long,
785 unsigned long);
786#define HAVE_ARCH_FB_UNMAPPED_AREA
787
788extern void pgtable_cache_init(void);
789extern void sun4v_register_fault_status(void);
790extern void sun4v_ktsb_register(void);
791extern void __init cheetah_ecache_flush_init(void);
792extern void sun4v_patch_tlb_handlers(void);
793
794extern unsigned long cmdline_memory_size;
795
796extern asmlinkage void do_sparc64_fault(struct pt_regs *regs);
797
798#endif /* !(__ASSEMBLY__) */
799
800#endif /* !(_SPARC64_PGTABLE_H) */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * pgtable.h: SpitFire page table operations.
4 *
5 * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
8
9#ifndef _SPARC64_PGTABLE_H
10#define _SPARC64_PGTABLE_H
11
12/* This file contains the functions and defines necessary to modify and use
13 * the SpitFire page tables.
14 */
15
16#include <asm-generic/pgtable-nop4d.h>
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/adi.h>
23#include <asm/page.h>
24#include <asm/processor.h>
25
26/* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB).
27 * The page copy blockops can use 0x6000000 to 0x8000000.
28 * The 8K TSB is mapped in the 0x8000000 to 0x8400000 range.
29 * The 4M TSB is mapped in the 0x8400000 to 0x8800000 range.
30 * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
31 * The vmalloc area spans 0x100000000 to 0x200000000.
32 * Since modules need to be in the lowest 32-bits of the address space,
33 * we place them right before the OBP area from 0x10000000 to 0xf0000000.
34 * There is a single static kernel PMD which maps from 0x0 to address
35 * 0x400000000.
36 */
37#define TLBTEMP_BASE _AC(0x0000000006000000,UL)
38#define TSBMAP_8K_BASE _AC(0x0000000008000000,UL)
39#define TSBMAP_4M_BASE _AC(0x0000000008400000,UL)
40#define MODULES_VADDR _AC(0x0000000010000000,UL)
41#define MODULES_LEN _AC(0x00000000e0000000,UL)
42#define MODULES_END _AC(0x00000000f0000000,UL)
43#define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL)
44#define HI_OBP_ADDRESS _AC(0x0000000100000000,UL)
45#define VMALLOC_START _AC(0x0000000100000000,UL)
46#define VMEMMAP_BASE VMALLOC_END
47
48/* PMD_SHIFT determines the size of the area a second-level page
49 * table can map
50 */
51#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
52#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
53#define PMD_MASK (~(PMD_SIZE-1))
54#define PMD_BITS (PAGE_SHIFT - 3)
55
56/* PUD_SHIFT determines the size of the area a third-level page
57 * table can map
58 */
59#define PUD_SHIFT (PMD_SHIFT + PMD_BITS)
60#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
61#define PUD_MASK (~(PUD_SIZE-1))
62#define PUD_BITS (PAGE_SHIFT - 3)
63
64/* PGDIR_SHIFT determines what a fourth-level page table entry can map */
65#define PGDIR_SHIFT (PUD_SHIFT + PUD_BITS)
66#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
67#define PGDIR_MASK (~(PGDIR_SIZE-1))
68#define PGDIR_BITS (PAGE_SHIFT - 3)
69
70#if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS)
71#error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support
72#endif
73
74#if (PGDIR_SHIFT + PGDIR_BITS) != 53
75#error Page table parameters do not cover virtual address space properly.
76#endif
77
78#if (PMD_SHIFT != HPAGE_SHIFT)
79#error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages.
80#endif
81
82#ifndef __ASSEMBLY__
83
84extern unsigned long VMALLOC_END;
85
86#define vmemmap ((struct page *)VMEMMAP_BASE)
87
88#include <linux/sched.h>
89#include <asm/tlbflush.h>
90
91bool kern_addr_valid(unsigned long addr);
92
93/* Entries per page directory level. */
94#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
95#define PTRS_PER_PMD (1UL << PMD_BITS)
96#define PTRS_PER_PUD (1UL << PUD_BITS)
97#define PTRS_PER_PGD (1UL << PGDIR_BITS)
98
99#define pmd_ERROR(e) \
100 pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n", \
101 __FILE__, __LINE__, &(e), pmd_val(e), __builtin_return_address(0))
102#define pud_ERROR(e) \
103 pr_err("%s:%d: bad pud %p(%016lx) seen at (%pS)\n", \
104 __FILE__, __LINE__, &(e), pud_val(e), __builtin_return_address(0))
105#define pgd_ERROR(e) \
106 pr_err("%s:%d: bad pgd %p(%016lx) seen at (%pS)\n", \
107 __FILE__, __LINE__, &(e), pgd_val(e), __builtin_return_address(0))
108
109#endif /* !(__ASSEMBLY__) */
110
111/* PTE bits which are the same in SUN4U and SUN4V format. */
112#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
113#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
114#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */
115#define _PAGE_PMD_HUGE _AC(0x0100000000000000,UL) /* Huge page */
116#define _PAGE_PUD_HUGE _PAGE_PMD_HUGE
117
118/* SUN4U pte bits... */
119#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
120#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
121#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
122#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
123#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
124#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
125#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
126#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */
127#define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page */
128#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
129#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
130#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
131#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
132#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
133#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
134#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
135#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
136#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
137#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
138#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
139#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
140#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
141#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
142#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
143#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
144#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
145#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
146#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
147#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
148
149/* SUN4V pte bits... */
150#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
151#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
152#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
153#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
154#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
155#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
156#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */
157#define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page */
158#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
159#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
160#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
161#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
162#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
163/* Bit 9 is used to enable MCD corruption detection instead on M7 */
164#define _PAGE_MCD_4V _AC(0x0000000000000200,UL) /* Memory Corruption */
165#define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */
166#define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */
167#define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */
168#define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */
169#define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */
170#define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */
171#define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */
172#define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */
173#define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */
174#define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */
175#define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */
176#define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */
177#define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */
178#define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */
179#define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */
180
181#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
182#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
183
184#if REAL_HPAGE_SHIFT != 22
185#error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up
186#endif
187
188#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
189#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
190
191/* We borrow bit 20 to store the exclusive marker in swap PTEs. */
192#define _PAGE_SWP_EXCLUSIVE _AC(0x0000000000100000, UL)
193
194#ifndef __ASSEMBLY__
195
196pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
197
198unsigned long pte_sz_bits(unsigned long size);
199
200extern pgprot_t PAGE_KERNEL;
201extern pgprot_t PAGE_KERNEL_LOCKED;
202extern pgprot_t PAGE_COPY;
203extern pgprot_t PAGE_SHARED;
204
205/* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */
206extern unsigned long _PAGE_IE;
207extern unsigned long _PAGE_E;
208extern unsigned long _PAGE_CACHE;
209
210extern unsigned long pg_iobits;
211extern unsigned long _PAGE_ALL_SZ_BITS;
212
213extern struct page *mem_map_zero;
214#define ZERO_PAGE(vaddr) (mem_map_zero)
215
216/* PFNs are real physical page numbers. However, mem_map only begins to record
217 * per-page information starting at pfn_base. This is to handle systems where
218 * the first physical page in the machine is at some huge physical address,
219 * such as 4GB. This is common on a partitioned E10000, for example.
220 */
221static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
222{
223 unsigned long paddr = pfn << PAGE_SHIFT;
224
225 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
226 return __pte(paddr | pgprot_val(prot));
227}
228#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
229
230#ifdef CONFIG_TRANSPARENT_HUGEPAGE
231static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
232{
233 pte_t pte = pfn_pte(page_nr, pgprot);
234
235 return __pmd(pte_val(pte));
236}
237#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
238#endif
239
240/* This one can be done with two shifts. */
241static inline unsigned long pte_pfn(pte_t pte)
242{
243 unsigned long ret;
244
245 __asm__ __volatile__(
246 "\n661: sllx %1, %2, %0\n"
247 " srlx %0, %3, %0\n"
248 " .section .sun4v_2insn_patch, \"ax\"\n"
249 " .word 661b\n"
250 " sllx %1, %4, %0\n"
251 " srlx %0, %5, %0\n"
252 " .previous\n"
253 : "=r" (ret)
254 : "r" (pte_val(pte)),
255 "i" (21), "i" (21 + PAGE_SHIFT),
256 "i" (8), "i" (8 + PAGE_SHIFT));
257
258 return ret;
259}
260#define pte_page(x) pfn_to_page(pte_pfn(x))
261
262static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
263{
264 unsigned long mask, tmp;
265
266 /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7)
267 * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8)
268 *
269 * Even if we use negation tricks the result is still a 6
270 * instruction sequence, so don't try to play fancy and just
271 * do the most straightforward implementation.
272 *
273 * Note: We encode this into 3 sun4v 2-insn patch sequences.
274 */
275
276 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
277 __asm__ __volatile__(
278 "\n661: sethi %%uhi(%2), %1\n"
279 " sethi %%hi(%2), %0\n"
280 "\n662: or %1, %%ulo(%2), %1\n"
281 " or %0, %%lo(%2), %0\n"
282 "\n663: sllx %1, 32, %1\n"
283 " or %0, %1, %0\n"
284 " .section .sun4v_2insn_patch, \"ax\"\n"
285 " .word 661b\n"
286 " sethi %%uhi(%3), %1\n"
287 " sethi %%hi(%3), %0\n"
288 " .word 662b\n"
289 " or %1, %%ulo(%3), %1\n"
290 " or %0, %%lo(%3), %0\n"
291 " .word 663b\n"
292 " sllx %1, 32, %1\n"
293 " or %0, %1, %0\n"
294 " .previous\n"
295 " .section .sun_m7_2insn_patch, \"ax\"\n"
296 " .word 661b\n"
297 " sethi %%uhi(%4), %1\n"
298 " sethi %%hi(%4), %0\n"
299 " .word 662b\n"
300 " or %1, %%ulo(%4), %1\n"
301 " or %0, %%lo(%4), %0\n"
302 " .word 663b\n"
303 " sllx %1, 32, %1\n"
304 " or %0, %1, %0\n"
305 " .previous\n"
306 : "=r" (mask), "=r" (tmp)
307 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
308 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U |
309 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U),
310 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
311 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V |
312 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V),
313 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
314 _PAGE_CP_4V | _PAGE_E_4V |
315 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V));
316
317 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
318}
319
320#ifdef CONFIG_TRANSPARENT_HUGEPAGE
321static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
322{
323 pte_t pte = __pte(pmd_val(pmd));
324
325 pte = pte_modify(pte, newprot);
326
327 return __pmd(pte_val(pte));
328}
329#endif
330
331static inline pgprot_t pgprot_noncached(pgprot_t prot)
332{
333 unsigned long val = pgprot_val(prot);
334
335 __asm__ __volatile__(
336 "\n661: andn %0, %2, %0\n"
337 " or %0, %3, %0\n"
338 " .section .sun4v_2insn_patch, \"ax\"\n"
339 " .word 661b\n"
340 " andn %0, %4, %0\n"
341 " or %0, %5, %0\n"
342 " .previous\n"
343 " .section .sun_m7_2insn_patch, \"ax\"\n"
344 " .word 661b\n"
345 " andn %0, %6, %0\n"
346 " or %0, %5, %0\n"
347 " .previous\n"
348 : "=r" (val)
349 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
350 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V),
351 "i" (_PAGE_CP_4V));
352
353 return __pgprot(val);
354}
355/* Various pieces of code check for platform support by ifdef testing
356 * on "pgprot_noncached". That's broken and should be fixed, but for
357 * now...
358 */
359#define pgprot_noncached pgprot_noncached
360
361static inline unsigned long pte_dirty(pte_t pte)
362{
363 unsigned long mask;
364
365 __asm__ __volatile__(
366 "\n661: mov %1, %0\n"
367 " nop\n"
368 " .section .sun4v_2insn_patch, \"ax\"\n"
369 " .word 661b\n"
370 " sethi %%uhi(%2), %0\n"
371 " sllx %0, 32, %0\n"
372 " .previous\n"
373 : "=r" (mask)
374 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
375
376 return (pte_val(pte) & mask);
377}
378
379static inline unsigned long pte_write(pte_t pte)
380{
381 unsigned long mask;
382
383 __asm__ __volatile__(
384 "\n661: mov %1, %0\n"
385 " nop\n"
386 " .section .sun4v_2insn_patch, \"ax\"\n"
387 " .word 661b\n"
388 " sethi %%uhi(%2), %0\n"
389 " sllx %0, 32, %0\n"
390 " .previous\n"
391 : "=r" (mask)
392 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
393
394 return (pte_val(pte) & mask);
395}
396
397#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
398pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags);
399#define arch_make_huge_pte arch_make_huge_pte
400static inline unsigned long __pte_default_huge_mask(void)
401{
402 unsigned long mask;
403
404 __asm__ __volatile__(
405 "\n661: sethi %%uhi(%1), %0\n"
406 " sllx %0, 32, %0\n"
407 " .section .sun4v_2insn_patch, \"ax\"\n"
408 " .word 661b\n"
409 " mov %2, %0\n"
410 " nop\n"
411 " .previous\n"
412 : "=r" (mask)
413 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
414
415 return mask;
416}
417
418static inline pte_t pte_mkhuge(pte_t pte)
419{
420 return __pte(pte_val(pte) | __pte_default_huge_mask());
421}
422
423static inline bool is_default_hugetlb_pte(pte_t pte)
424{
425 unsigned long mask = __pte_default_huge_mask();
426
427 return (pte_val(pte) & mask) == mask;
428}
429
430static inline bool is_hugetlb_pmd(pmd_t pmd)
431{
432 return !!(pmd_val(pmd) & _PAGE_PMD_HUGE);
433}
434
435static inline bool is_hugetlb_pud(pud_t pud)
436{
437 return !!(pud_val(pud) & _PAGE_PUD_HUGE);
438}
439
440#ifdef CONFIG_TRANSPARENT_HUGEPAGE
441static inline pmd_t pmd_mkhuge(pmd_t pmd)
442{
443 pte_t pte = __pte(pmd_val(pmd));
444
445 pte = pte_mkhuge(pte);
446 pte_val(pte) |= _PAGE_PMD_HUGE;
447
448 return __pmd(pte_val(pte));
449}
450#endif
451#else
452static inline bool is_hugetlb_pte(pte_t pte)
453{
454 return false;
455}
456#endif
457
458static inline pte_t __pte_mkhwwrite(pte_t pte)
459{
460 unsigned long val = pte_val(pte);
461
462 /*
463 * Note: we only want to set the HW writable bit if the SW writable bit
464 * and the SW dirty bit are set.
465 */
466 __asm__ __volatile__(
467 "\n661: or %0, %2, %0\n"
468 " .section .sun4v_1insn_patch, \"ax\"\n"
469 " .word 661b\n"
470 " or %0, %3, %0\n"
471 " .previous\n"
472 : "=r" (val)
473 : "0" (val), "i" (_PAGE_W_4U), "i" (_PAGE_W_4V));
474
475 return __pte(val);
476}
477
478static inline pte_t pte_mkdirty(pte_t pte)
479{
480 unsigned long val = pte_val(pte), mask;
481
482 __asm__ __volatile__(
483 "\n661: mov %1, %0\n"
484 " nop\n"
485 " .section .sun4v_2insn_patch, \"ax\"\n"
486 " .word 661b\n"
487 " sethi %%uhi(%2), %0\n"
488 " sllx %0, 32, %0\n"
489 " .previous\n"
490 : "=r" (mask)
491 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
492
493 pte = __pte(val | mask);
494 return pte_write(pte) ? __pte_mkhwwrite(pte) : pte;
495}
496
497static inline pte_t pte_mkclean(pte_t pte)
498{
499 unsigned long val = pte_val(pte), tmp;
500
501 __asm__ __volatile__(
502 "\n661: andn %0, %3, %0\n"
503 " nop\n"
504 "\n662: nop\n"
505 " nop\n"
506 " .section .sun4v_2insn_patch, \"ax\"\n"
507 " .word 661b\n"
508 " sethi %%uhi(%4), %1\n"
509 " sllx %1, 32, %1\n"
510 " .word 662b\n"
511 " or %1, %%lo(%4), %1\n"
512 " andn %0, %1, %0\n"
513 " .previous\n"
514 : "=r" (val), "=r" (tmp)
515 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
516 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
517
518 return __pte(val);
519}
520
521static inline pte_t pte_mkwrite_novma(pte_t pte)
522{
523 unsigned long val = pte_val(pte), mask;
524
525 __asm__ __volatile__(
526 "\n661: mov %1, %0\n"
527 " nop\n"
528 " .section .sun4v_2insn_patch, \"ax\"\n"
529 " .word 661b\n"
530 " sethi %%uhi(%2), %0\n"
531 " sllx %0, 32, %0\n"
532 " .previous\n"
533 : "=r" (mask)
534 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
535
536 pte = __pte(val | mask);
537 return pte_dirty(pte) ? __pte_mkhwwrite(pte) : pte;
538}
539
540static inline pte_t pte_wrprotect(pte_t pte)
541{
542 unsigned long val = pte_val(pte), tmp;
543
544 __asm__ __volatile__(
545 "\n661: andn %0, %3, %0\n"
546 " nop\n"
547 "\n662: nop\n"
548 " nop\n"
549 " .section .sun4v_2insn_patch, \"ax\"\n"
550 " .word 661b\n"
551 " sethi %%uhi(%4), %1\n"
552 " sllx %1, 32, %1\n"
553 " .word 662b\n"
554 " or %1, %%lo(%4), %1\n"
555 " andn %0, %1, %0\n"
556 " .previous\n"
557 : "=r" (val), "=r" (tmp)
558 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
559 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
560
561 return __pte(val);
562}
563
564static inline pte_t pte_mkold(pte_t pte)
565{
566 unsigned long mask;
567
568 __asm__ __volatile__(
569 "\n661: mov %1, %0\n"
570 " nop\n"
571 " .section .sun4v_2insn_patch, \"ax\"\n"
572 " .word 661b\n"
573 " sethi %%uhi(%2), %0\n"
574 " sllx %0, 32, %0\n"
575 " .previous\n"
576 : "=r" (mask)
577 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
578
579 mask |= _PAGE_R;
580
581 return __pte(pte_val(pte) & ~mask);
582}
583
584static inline pte_t pte_mkyoung(pte_t pte)
585{
586 unsigned long mask;
587
588 __asm__ __volatile__(
589 "\n661: mov %1, %0\n"
590 " nop\n"
591 " .section .sun4v_2insn_patch, \"ax\"\n"
592 " .word 661b\n"
593 " sethi %%uhi(%2), %0\n"
594 " sllx %0, 32, %0\n"
595 " .previous\n"
596 : "=r" (mask)
597 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
598
599 mask |= _PAGE_R;
600
601 return __pte(pte_val(pte) | mask);
602}
603
604static inline pte_t pte_mkspecial(pte_t pte)
605{
606 pte_val(pte) |= _PAGE_SPECIAL;
607 return pte;
608}
609
610static inline pte_t pte_mkmcd(pte_t pte)
611{
612 pte_val(pte) |= _PAGE_MCD_4V;
613 return pte;
614}
615
616static inline pte_t pte_mknotmcd(pte_t pte)
617{
618 pte_val(pte) &= ~_PAGE_MCD_4V;
619 return pte;
620}
621
622static inline unsigned long pte_young(pte_t pte)
623{
624 unsigned long mask;
625
626 __asm__ __volatile__(
627 "\n661: mov %1, %0\n"
628 " nop\n"
629 " .section .sun4v_2insn_patch, \"ax\"\n"
630 " .word 661b\n"
631 " sethi %%uhi(%2), %0\n"
632 " sllx %0, 32, %0\n"
633 " .previous\n"
634 : "=r" (mask)
635 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
636
637 return (pte_val(pte) & mask);
638}
639
640static inline unsigned long pte_exec(pte_t pte)
641{
642 unsigned long mask;
643
644 __asm__ __volatile__(
645 "\n661: sethi %%hi(%1), %0\n"
646 " .section .sun4v_1insn_patch, \"ax\"\n"
647 " .word 661b\n"
648 " mov %2, %0\n"
649 " .previous\n"
650 : "=r" (mask)
651 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
652
653 return (pte_val(pte) & mask);
654}
655
656static inline unsigned long pte_present(pte_t pte)
657{
658 unsigned long val = pte_val(pte);
659
660 __asm__ __volatile__(
661 "\n661: and %0, %2, %0\n"
662 " .section .sun4v_1insn_patch, \"ax\"\n"
663 " .word 661b\n"
664 " and %0, %3, %0\n"
665 " .previous\n"
666 : "=r" (val)
667 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
668
669 return val;
670}
671
672#define pte_accessible pte_accessible
673static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
674{
675 return pte_val(a) & _PAGE_VALID;
676}
677
678static inline unsigned long pte_special(pte_t pte)
679{
680 return pte_val(pte) & _PAGE_SPECIAL;
681}
682
683#define pmd_leaf pmd_leaf
684static inline bool pmd_leaf(pmd_t pmd)
685{
686 pte_t pte = __pte(pmd_val(pmd));
687
688 return pte_val(pte) & _PAGE_PMD_HUGE;
689}
690
691static inline unsigned long pmd_pfn(pmd_t pmd)
692{
693 pte_t pte = __pte(pmd_val(pmd));
694
695 return pte_pfn(pte);
696}
697
698#define pmd_write pmd_write
699static inline unsigned long pmd_write(pmd_t pmd)
700{
701 pte_t pte = __pte(pmd_val(pmd));
702
703 return pte_write(pte);
704}
705
706#define pud_write(pud) pte_write(__pte(pud_val(pud)))
707
708#ifdef CONFIG_TRANSPARENT_HUGEPAGE
709#define pmd_dirty pmd_dirty
710static inline unsigned long pmd_dirty(pmd_t pmd)
711{
712 pte_t pte = __pte(pmd_val(pmd));
713
714 return pte_dirty(pte);
715}
716
717#define pmd_young pmd_young
718static inline unsigned long pmd_young(pmd_t pmd)
719{
720 pte_t pte = __pte(pmd_val(pmd));
721
722 return pte_young(pte);
723}
724
725static inline unsigned long pmd_trans_huge(pmd_t pmd)
726{
727 pte_t pte = __pte(pmd_val(pmd));
728
729 return pte_val(pte) & _PAGE_PMD_HUGE;
730}
731
732static inline pmd_t pmd_mkold(pmd_t pmd)
733{
734 pte_t pte = __pte(pmd_val(pmd));
735
736 pte = pte_mkold(pte);
737
738 return __pmd(pte_val(pte));
739}
740
741static inline pmd_t pmd_wrprotect(pmd_t pmd)
742{
743 pte_t pte = __pte(pmd_val(pmd));
744
745 pte = pte_wrprotect(pte);
746
747 return __pmd(pte_val(pte));
748}
749
750static inline pmd_t pmd_mkdirty(pmd_t pmd)
751{
752 pte_t pte = __pte(pmd_val(pmd));
753
754 pte = pte_mkdirty(pte);
755
756 return __pmd(pte_val(pte));
757}
758
759static inline pmd_t pmd_mkclean(pmd_t pmd)
760{
761 pte_t pte = __pte(pmd_val(pmd));
762
763 pte = pte_mkclean(pte);
764
765 return __pmd(pte_val(pte));
766}
767
768static inline pmd_t pmd_mkyoung(pmd_t pmd)
769{
770 pte_t pte = __pte(pmd_val(pmd));
771
772 pte = pte_mkyoung(pte);
773
774 return __pmd(pte_val(pte));
775}
776
777static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
778{
779 pte_t pte = __pte(pmd_val(pmd));
780
781 pte = pte_mkwrite_novma(pte);
782
783 return __pmd(pte_val(pte));
784}
785
786#define pmd_pgprot pmd_pgprot
787static inline pgprot_t pmd_pgprot(pmd_t entry)
788{
789 unsigned long val = pmd_val(entry);
790
791 return __pgprot(val);
792}
793#endif
794
795static inline int pmd_present(pmd_t pmd)
796{
797 return pmd_val(pmd) != 0UL;
798}
799
800#define pmd_none(pmd) (!pmd_val(pmd))
801
802/* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is
803 * very simple, it's just the physical address. PTE tables are of
804 * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
805 * the top bits outside of the range of any physical address size we
806 * support are clear as well. We also validate the physical itself.
807 */
808#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
809
810#define pud_none(pud) (!pud_val(pud))
811
812#define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK)
813
814#define p4d_none(p4d) (!p4d_val(p4d))
815
816#define p4d_bad(p4d) (p4d_val(p4d) & ~PAGE_MASK)
817
818#ifdef CONFIG_TRANSPARENT_HUGEPAGE
819void set_pmd_at(struct mm_struct *mm, unsigned long addr,
820 pmd_t *pmdp, pmd_t pmd);
821#else
822static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
823 pmd_t *pmdp, pmd_t pmd)
824{
825 *pmdp = pmd;
826}
827#endif
828
829static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
830{
831 unsigned long val = __pa((unsigned long) (ptep));
832
833 pmd_val(*pmdp) = val;
834}
835
836#define pud_set(pudp, pmdp) \
837 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
838static inline unsigned long pmd_page_vaddr(pmd_t pmd)
839{
840 pte_t pte = __pte(pmd_val(pmd));
841 unsigned long pfn;
842
843 pfn = pte_pfn(pte);
844
845 return ((unsigned long) __va(pfn << PAGE_SHIFT));
846}
847
848static inline pmd_t *pud_pgtable(pud_t pud)
849{
850 pte_t pte = __pte(pud_val(pud));
851 unsigned long pfn;
852
853 pfn = pte_pfn(pte);
854
855 return ((pmd_t *) __va(pfn << PAGE_SHIFT));
856}
857
858#define pmd_page(pmd) virt_to_page((void *)pmd_page_vaddr(pmd))
859#define pud_page(pud) virt_to_page((void *)pud_pgtable(pud))
860#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
861#define pud_present(pud) (pud_val(pud) != 0U)
862#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
863#define p4d_pgtable(p4d) \
864 ((pud_t *) __va(p4d_val(p4d)))
865#define p4d_present(p4d) (p4d_val(p4d) != 0U)
866#define p4d_clear(p4dp) (p4d_val(*(p4dp)) = 0UL)
867
868/* only used by the stubbed out hugetlb gup code, should never be called */
869#define p4d_page(p4d) NULL
870
871#define pud_leaf pud_leaf
872static inline bool pud_leaf(pud_t pud)
873{
874 pte_t pte = __pte(pud_val(pud));
875
876 return pte_val(pte) & _PAGE_PMD_HUGE;
877}
878
879#define pud_pfn pud_pfn
880static inline unsigned long pud_pfn(pud_t pud)
881{
882 pte_t pte = __pte(pud_val(pud));
883
884 return pte_pfn(pte);
885}
886
887/* Same in both SUN4V and SUN4U. */
888#define pte_none(pte) (!pte_val(pte))
889
890#define p4d_set(p4dp, pudp) \
891 (p4d_val(*(p4dp)) = (__pa((unsigned long) (pudp))))
892
893/* We cannot include <linux/mm_types.h> at this point yet: */
894extern struct mm_struct init_mm;
895
896/* Actual page table PTE updates. */
897void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
898 pte_t *ptep, pte_t orig, int fullmm,
899 unsigned int hugepage_shift);
900
901static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
902 pte_t *ptep, pte_t orig, int fullmm,
903 unsigned int hugepage_shift)
904{
905 /* It is more efficient to let flush_tlb_kernel_range()
906 * handle init_mm tlb flushes.
907 *
908 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
909 * and SUN4V pte layout, so this inline test is fine.
910 */
911 if (likely(mm != &init_mm) && pte_accessible(mm, orig))
912 tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift);
913}
914
915#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
916static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
917 unsigned long addr,
918 pmd_t *pmdp)
919{
920 pmd_t pmd = *pmdp;
921 set_pmd_at(mm, addr, pmdp, __pmd(0UL));
922 return pmd;
923}
924
925static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
926 pte_t *ptep, pte_t pte, int fullmm)
927{
928 pte_t orig = *ptep;
929
930 *ptep = pte;
931 maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT);
932}
933
934#define PFN_PTE_SHIFT PAGE_SHIFT
935
936static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
937 pte_t *ptep, pte_t pte, unsigned int nr)
938{
939 arch_enter_lazy_mmu_mode();
940 for (;;) {
941 __set_pte_at(mm, addr, ptep, pte, 0);
942 if (--nr == 0)
943 break;
944 ptep++;
945 pte_val(pte) += PAGE_SIZE;
946 addr += PAGE_SIZE;
947 }
948 arch_leave_lazy_mmu_mode();
949}
950#define set_ptes set_ptes
951
952#define pte_clear(mm,addr,ptep) \
953 set_pte_at((mm), (addr), (ptep), __pte(0UL))
954
955#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
956#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
957 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
958
959#ifdef DCACHE_ALIASING_POSSIBLE
960#define __HAVE_ARCH_MOVE_PTE
961#define move_pte(pte, old_addr, new_addr) \
962({ \
963 pte_t newpte = (pte); \
964 if (tlb_type != hypervisor && pte_present(pte)) { \
965 unsigned long this_pfn = pte_pfn(pte); \
966 \
967 if (pfn_valid(this_pfn) && \
968 (((old_addr) ^ (new_addr)) & (1 << 13))) \
969 flush_dcache_folio_all(current->mm, \
970 page_folio(pfn_to_page(this_pfn))); \
971 } \
972 newpte; \
973})
974#endif
975
976extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
977
978void paging_init(void);
979unsigned long find_ecache_flush_span(unsigned long size);
980
981struct seq_file;
982void mmu_info(struct seq_file *);
983
984struct vm_area_struct;
985void update_mmu_cache_range(struct vm_fault *, struct vm_area_struct *,
986 unsigned long addr, pte_t *ptep, unsigned int nr);
987#define update_mmu_cache(vma, addr, ptep) \
988 update_mmu_cache_range(NULL, vma, addr, ptep, 1)
989#ifdef CONFIG_TRANSPARENT_HUGEPAGE
990void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
991 pmd_t *pmd);
992
993#define __HAVE_ARCH_PMDP_INVALIDATE
994extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
995 pmd_t *pmdp);
996
997#define __HAVE_ARCH_PGTABLE_DEPOSIT
998void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
999 pgtable_t pgtable);
1000
1001#define __HAVE_ARCH_PGTABLE_WITHDRAW
1002pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
1003#endif
1004
1005/*
1006 * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
1007 * are !pte_none() && !pte_present().
1008 *
1009 * Format of swap PTEs:
1010 *
1011 * 6 6 6 6 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3
1012 * 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2
1013 * <--------------------------- offset ---------------------------
1014 *
1015 * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
1016 * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
1017 * --------------------> E <-- type ---> <------- zeroes -------->
1018 */
1019#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0x7fUL)
1020#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
1021#define __swp_entry(type, offset) \
1022 ( (swp_entry_t) \
1023 { \
1024 ((((long)(type) & 0x7fUL) << PAGE_SHIFT) | \
1025 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
1026 } )
1027#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
1028#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
1029
1030static inline int pte_swp_exclusive(pte_t pte)
1031{
1032 return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
1033}
1034
1035static inline pte_t pte_swp_mkexclusive(pte_t pte)
1036{
1037 return __pte(pte_val(pte) | _PAGE_SWP_EXCLUSIVE);
1038}
1039
1040static inline pte_t pte_swp_clear_exclusive(pte_t pte)
1041{
1042 return __pte(pte_val(pte) & ~_PAGE_SWP_EXCLUSIVE);
1043}
1044
1045int page_in_phys_avail(unsigned long paddr);
1046
1047/*
1048 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
1049 * its high 4 bits. These macros/functions put it there or get it from there.
1050 */
1051#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
1052#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
1053#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
1054
1055int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
1056 unsigned long, pgprot_t);
1057
1058void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1059 unsigned long addr, pte_t pte);
1060
1061int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1062 unsigned long addr, pte_t oldpte);
1063
1064#define __HAVE_ARCH_DO_SWAP_PAGE
1065static inline void arch_do_swap_page(struct mm_struct *mm,
1066 struct vm_area_struct *vma,
1067 unsigned long addr,
1068 pte_t pte, pte_t oldpte)
1069{
1070 /* If this is a new page being mapped in, there can be no
1071 * ADI tags stored away for this page. Skip looking for
1072 * stored tags
1073 */
1074 if (pte_none(oldpte))
1075 return;
1076
1077 if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V))
1078 adi_restore_tags(mm, vma, addr, pte);
1079}
1080
1081#define __HAVE_ARCH_UNMAP_ONE
1082static inline int arch_unmap_one(struct mm_struct *mm,
1083 struct vm_area_struct *vma,
1084 unsigned long addr, pte_t oldpte)
1085{
1086 if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V))
1087 return adi_save_tags(mm, vma, addr, oldpte);
1088 return 0;
1089}
1090
1091static inline int io_remap_pfn_range(struct vm_area_struct *vma,
1092 unsigned long from, unsigned long pfn,
1093 unsigned long size, pgprot_t prot)
1094{
1095 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
1096 int space = GET_IOSPACE(pfn);
1097 unsigned long phys_base;
1098
1099 phys_base = offset | (((unsigned long) space) << 32UL);
1100
1101 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
1102}
1103#define io_remap_pfn_range io_remap_pfn_range
1104
1105static inline unsigned long __untagged_addr(unsigned long start)
1106{
1107 if (adi_capable()) {
1108 long addr = start;
1109
1110 /* If userspace has passed a versioned address, kernel
1111 * will not find it in the VMAs since it does not store
1112 * the version tags in the list of VMAs. Storing version
1113 * tags in list of VMAs is impractical since they can be
1114 * changed any time from userspace without dropping into
1115 * kernel. Any address search in VMAs will be done with
1116 * non-versioned addresses. Ensure the ADI version bits
1117 * are dropped here by sign extending the last bit before
1118 * ADI bits. IOMMU does not implement version tags.
1119 */
1120 return (addr << (long)adi_nbits()) >> (long)adi_nbits();
1121 }
1122
1123 return start;
1124}
1125#define untagged_addr(addr) \
1126 ((__typeof__(addr))(__untagged_addr((unsigned long)(addr))))
1127
1128static inline bool pte_access_permitted(pte_t pte, bool write)
1129{
1130 u64 prot;
1131
1132 if (tlb_type == hypervisor) {
1133 prot = _PAGE_PRESENT_4V | _PAGE_P_4V;
1134 if (write)
1135 prot |= _PAGE_WRITE_4V;
1136 } else {
1137 prot = _PAGE_PRESENT_4U | _PAGE_P_4U;
1138 if (write)
1139 prot |= _PAGE_WRITE_4U;
1140 }
1141
1142 return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
1143}
1144#define pte_access_permitted pte_access_permitted
1145
1146/* We provide our own get_unmapped_area to cope with VA holes and
1147 * SHM area cache aliasing for userland.
1148 */
1149#define HAVE_ARCH_UNMAPPED_AREA
1150#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
1151
1152/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
1153 * the largest alignment possible such that larget PTEs can be used.
1154 */
1155unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
1156 unsigned long, unsigned long,
1157 unsigned long);
1158#define HAVE_ARCH_FB_UNMAPPED_AREA
1159
1160void sun4v_register_fault_status(void);
1161void sun4v_ktsb_register(void);
1162void __init cheetah_ecache_flush_init(void);
1163void sun4v_patch_tlb_handlers(void);
1164
1165extern unsigned long cmdline_memory_size;
1166
1167asmlinkage void do_sparc64_fault(struct pt_regs *regs);
1168
1169#define pmd_pgtable(PMD) ((pte_t *)pmd_page_vaddr(PMD))
1170
1171#ifdef CONFIG_HUGETLB_PAGE
1172
1173#define pud_leaf_size pud_leaf_size
1174extern unsigned long pud_leaf_size(pud_t pud);
1175
1176#define pmd_leaf_size pmd_leaf_size
1177extern unsigned long pmd_leaf_size(pmd_t pmd);
1178
1179#define pte_leaf_size pte_leaf_size
1180extern unsigned long pte_leaf_size(pte_t pte);
1181
1182#endif /* CONFIG_HUGETLB_PAGE */
1183
1184#endif /* !(__ASSEMBLY__) */
1185
1186#endif /* !(_SPARC64_PGTABLE_H) */