1
2#ifndef _ASM_X86_PGTABLE_DEFS_H
3#define _ASM_X86_PGTABLE_DEFS_H
4
5#include <linux/const.h>
6#include <linux/mem_encrypt.h>
7
8#include <asm/page_types.h>
9
10#define FIRST_USER_ADDRESS 0UL
11
12#define _PAGE_BIT_PRESENT 0
13#define _PAGE_BIT_RW 1
14#define _PAGE_BIT_USER 2
15#define _PAGE_BIT_PWT 3
16#define _PAGE_BIT_PCD 4
17#define _PAGE_BIT_ACCESSED 5
18#define _PAGE_BIT_DIRTY 6
19#define _PAGE_BIT_PSE 7
20#define _PAGE_BIT_PAT 7
21#define _PAGE_BIT_GLOBAL 8
22#define _PAGE_BIT_SOFTW1 9
23#define _PAGE_BIT_SOFTW2 10
24#define _PAGE_BIT_SOFTW3 11
25#define _PAGE_BIT_PAT_LARGE 12
26#define _PAGE_BIT_SOFTW4 58
27#define _PAGE_BIT_PKEY_BIT0 59
28#define _PAGE_BIT_PKEY_BIT1 60
29#define _PAGE_BIT_PKEY_BIT2 61
30#define _PAGE_BIT_PKEY_BIT3 62
31#define _PAGE_BIT_NX 63
32
33#define _PAGE_BIT_SPECIAL _PAGE_BIT_SOFTW1
34#define _PAGE_BIT_CPA_TEST _PAGE_BIT_SOFTW1
35#define _PAGE_BIT_UFFD_WP _PAGE_BIT_SOFTW2
36#define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_SOFTW3
37#define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4
38
39
40
41#define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
42
43#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
44#define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
45#define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
46#define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
47#define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
48#define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
49#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
50#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
51#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
52#define _PAGE_SOFTW1 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1)
53#define _PAGE_SOFTW2 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2)
54#define _PAGE_SOFTW3 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW3)
55#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
56#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
57#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
58#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
59#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
60#define _PAGE_PKEY_BIT0 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0)
61#define _PAGE_PKEY_BIT1 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1)
62#define _PAGE_PKEY_BIT2 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2)
63#define _PAGE_PKEY_BIT3 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3)
64#else
65#define _PAGE_PKEY_BIT0 (_AT(pteval_t, 0))
66#define _PAGE_PKEY_BIT1 (_AT(pteval_t, 0))
67#define _PAGE_PKEY_BIT2 (_AT(pteval_t, 0))
68#define _PAGE_PKEY_BIT3 (_AT(pteval_t, 0))
69#endif
70
71#define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \
72 _PAGE_PKEY_BIT1 | \
73 _PAGE_PKEY_BIT2 | \
74 _PAGE_PKEY_BIT3)
75
76#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
77#define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
78#else
79#define _PAGE_KNL_ERRATUM_MASK 0
80#endif
81
82#ifdef CONFIG_MEM_SOFT_DIRTY
83#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
84#else
85#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0))
86#endif
87
88
89
90
91
92
93
94
95
96
97
98#ifdef CONFIG_MEM_SOFT_DIRTY
99#define _PAGE_SWP_SOFT_DIRTY _PAGE_RW
100#else
101#define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0))
102#endif
103
104#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP
105#define _PAGE_UFFD_WP (_AT(pteval_t, 1) << _PAGE_BIT_UFFD_WP)
106#define _PAGE_SWP_UFFD_WP _PAGE_USER
107#else
108#define _PAGE_UFFD_WP (_AT(pteval_t, 0))
109#define _PAGE_SWP_UFFD_WP (_AT(pteval_t, 0))
110#endif
111
112#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
113#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
114#define _PAGE_DEVMAP (_AT(u64, 1) << _PAGE_BIT_DEVMAP)
115#else
116#define _PAGE_NX (_AT(pteval_t, 0))
117#define _PAGE_DEVMAP (_AT(pteval_t, 0))
118#endif
119
120#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
121
122
123
124
125
126
127
128#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
129 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
130 _PAGE_SOFT_DIRTY | _PAGE_DEVMAP | _PAGE_ENC | \
131 _PAGE_UFFD_WP)
132#define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
133
134
135
136
137
138
139
140
141
142#ifndef __ASSEMBLY__
143enum page_cache_mode {
144 _PAGE_CACHE_MODE_WB = 0,
145 _PAGE_CACHE_MODE_WC = 1,
146 _PAGE_CACHE_MODE_UC_MINUS = 2,
147 _PAGE_CACHE_MODE_UC = 3,
148 _PAGE_CACHE_MODE_WT = 4,
149 _PAGE_CACHE_MODE_WP = 5,
150
151 _PAGE_CACHE_MODE_NUM = 8
152};
153#endif
154
155#define _PAGE_ENC (_AT(pteval_t, sme_me_mask))
156
157#define _PAGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT)
158#define _PAGE_LARGE_CACHE_MASK (_PAGE_PWT | _PAGE_PCD | _PAGE_PAT_LARGE)
159
160#define _PAGE_NOCACHE (cachemode2protval(_PAGE_CACHE_MODE_UC))
161#define _PAGE_CACHE_WP (cachemode2protval(_PAGE_CACHE_MODE_WP))
162
163#define __PP _PAGE_PRESENT
164#define __RW _PAGE_RW
165#define _USR _PAGE_USER
166#define ___A _PAGE_ACCESSED
167#define ___D _PAGE_DIRTY
168#define ___G _PAGE_GLOBAL
169#define __NX _PAGE_NX
170
171#define _ENC _PAGE_ENC
172#define __WP _PAGE_CACHE_WP
173#define __NC _PAGE_NOCACHE
174#define _PSE _PAGE_PSE
175
176#define pgprot_val(x) ((x).pgprot)
177#define __pgprot(x) ((pgprot_t) { (x) } )
178#define __pg(x) __pgprot(x)
179
180#define PAGE_NONE __pg( 0| 0| 0|___A| 0| 0| 0|___G)
181#define PAGE_SHARED __pg(__PP|__RW|_USR|___A|__NX| 0| 0| 0)
182#define PAGE_SHARED_EXEC __pg(__PP|__RW|_USR|___A| 0| 0| 0| 0)
183#define PAGE_COPY_NOEXEC __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
184#define PAGE_COPY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0)
185#define PAGE_COPY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
186#define PAGE_READONLY __pg(__PP| 0|_USR|___A|__NX| 0| 0| 0)
187#define PAGE_READONLY_EXEC __pg(__PP| 0|_USR|___A| 0| 0| 0| 0)
188
189#define __PAGE_KERNEL (__PP|__RW| 0|___A|__NX|___D| 0|___G)
190#define __PAGE_KERNEL_EXEC (__PP|__RW| 0|___A| 0|___D| 0|___G)
191#define _KERNPG_TABLE_NOENC (__PP|__RW| 0|___A| 0|___D| 0| 0)
192#define _KERNPG_TABLE (__PP|__RW| 0|___A| 0|___D| 0| 0| _ENC)
193#define _PAGE_TABLE_NOENC (__PP|__RW|_USR|___A| 0|___D| 0| 0)
194#define _PAGE_TABLE (__PP|__RW|_USR|___A| 0|___D| 0| 0| _ENC)
195#define __PAGE_KERNEL_RO (__PP| 0| 0|___A|__NX|___D| 0|___G)
196#define __PAGE_KERNEL_ROX (__PP| 0| 0|___A| 0|___D| 0|___G)
197#define __PAGE_KERNEL_NOCACHE (__PP|__RW| 0|___A|__NX|___D| 0|___G| __NC)
198#define __PAGE_KERNEL_VVAR (__PP| 0|_USR|___A|__NX|___D| 0|___G)
199#define __PAGE_KERNEL_LARGE (__PP|__RW| 0|___A|__NX|___D|_PSE|___G)
200#define __PAGE_KERNEL_LARGE_EXEC (__PP|__RW| 0|___A| 0|___D|_PSE|___G)
201#define __PAGE_KERNEL_WP (__PP|__RW| 0|___A|__NX|___D| 0|___G| __WP)
202
203
204#define __PAGE_KERNEL_IO __PAGE_KERNEL
205#define __PAGE_KERNEL_IO_NOCACHE __PAGE_KERNEL_NOCACHE
206
207
208#ifndef __ASSEMBLY__
209
210#define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _ENC)
211#define __PAGE_KERNEL_ENC_WP (__PAGE_KERNEL_WP | _ENC)
212#define __PAGE_KERNEL_NOENC (__PAGE_KERNEL | 0)
213#define __PAGE_KERNEL_NOENC_WP (__PAGE_KERNEL_WP | 0)
214
215#define __pgprot_mask(x) __pgprot((x) & __default_kernel_pte_mask)
216
217#define PAGE_KERNEL __pgprot_mask(__PAGE_KERNEL | _ENC)
218#define PAGE_KERNEL_NOENC __pgprot_mask(__PAGE_KERNEL | 0)
219#define PAGE_KERNEL_RO __pgprot_mask(__PAGE_KERNEL_RO | _ENC)
220#define PAGE_KERNEL_EXEC __pgprot_mask(__PAGE_KERNEL_EXEC | _ENC)
221#define PAGE_KERNEL_EXEC_NOENC __pgprot_mask(__PAGE_KERNEL_EXEC | 0)
222#define PAGE_KERNEL_ROX __pgprot_mask(__PAGE_KERNEL_ROX | _ENC)
223#define PAGE_KERNEL_NOCACHE __pgprot_mask(__PAGE_KERNEL_NOCACHE | _ENC)
224#define PAGE_KERNEL_LARGE __pgprot_mask(__PAGE_KERNEL_LARGE | _ENC)
225#define PAGE_KERNEL_LARGE_EXEC __pgprot_mask(__PAGE_KERNEL_LARGE_EXEC | _ENC)
226#define PAGE_KERNEL_VVAR __pgprot_mask(__PAGE_KERNEL_VVAR | _ENC)
227
228#define PAGE_KERNEL_IO __pgprot_mask(__PAGE_KERNEL_IO)
229#define PAGE_KERNEL_IO_NOCACHE __pgprot_mask(__PAGE_KERNEL_IO_NOCACHE)
230
231#endif
232
233
234#define __P000 PAGE_NONE
235#define __P001 PAGE_READONLY
236#define __P010 PAGE_COPY
237#define __P011 PAGE_COPY
238#define __P100 PAGE_READONLY_EXEC
239#define __P101 PAGE_READONLY_EXEC
240#define __P110 PAGE_COPY_EXEC
241#define __P111 PAGE_COPY_EXEC
242
243#define __S000 PAGE_NONE
244#define __S001 PAGE_READONLY
245#define __S010 PAGE_SHARED
246#define __S011 PAGE_SHARED
247#define __S100 PAGE_READONLY_EXEC
248#define __S101 PAGE_READONLY_EXEC
249#define __S110 PAGE_SHARED_EXEC
250#define __S111 PAGE_SHARED_EXEC
251
252
253
254
255#ifdef CONFIG_X86_64
256#define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
257#else
258#define PTE_IDENT_ATTR 0x003
259#define PDE_IDENT_ATTR 0x063
260#define PGD_IDENT_ATTR 0x001
261#endif
262
263#ifdef CONFIG_X86_32
264# include <asm/pgtable_32_types.h>
265#else
266# include <asm/pgtable_64_types.h>
267#endif
268
269#ifndef __ASSEMBLY__
270
271#include <linux/types.h>
272
273
274#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
275
276
277
278
279
280#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
281
282typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
283
284typedef struct { pgdval_t pgd; } pgd_t;
285
286static inline pgprot_t pgprot_nx(pgprot_t prot)
287{
288 return __pgprot(pgprot_val(prot) | _PAGE_NX);
289}
290#define pgprot_nx pgprot_nx
291
292#ifdef CONFIG_X86_PAE
293
294
295
296
297
298
299#define PGD_PAE_PAGE_MASK ((signed long)PAGE_MASK)
300#define PGD_PAE_PHYS_MASK (((1ULL << __PHYSICAL_MASK_SHIFT)-1) & PGD_PAE_PAGE_MASK)
301
302
303
304
305
306#define PGD_ALLOWED_BITS (PGD_PAE_PHYS_MASK | _PAGE_PRESENT | \
307 _PAGE_PWT | _PAGE_PCD | \
308 _PAGE_SOFTW1 | _PAGE_SOFTW2 | _PAGE_SOFTW3)
309
310#else
311
312#define PGD_ALLOWED_BITS (~0ULL)
313#endif
314
315static inline pgd_t native_make_pgd(pgdval_t val)
316{
317 return (pgd_t) { val & PGD_ALLOWED_BITS };
318}
319
320static inline pgdval_t native_pgd_val(pgd_t pgd)
321{
322 return pgd.pgd & PGD_ALLOWED_BITS;
323}
324
325static inline pgdval_t pgd_flags(pgd_t pgd)
326{
327 return native_pgd_val(pgd) & PTE_FLAGS_MASK;
328}
329
330#if CONFIG_PGTABLE_LEVELS > 4
331typedef struct { p4dval_t p4d; } p4d_t;
332
333static inline p4d_t native_make_p4d(pudval_t val)
334{
335 return (p4d_t) { val };
336}
337
338static inline p4dval_t native_p4d_val(p4d_t p4d)
339{
340 return p4d.p4d;
341}
342#else
343#include <asm-generic/pgtable-nop4d.h>
344
345static inline p4d_t native_make_p4d(pudval_t val)
346{
347 return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
348}
349
350static inline p4dval_t native_p4d_val(p4d_t p4d)
351{
352 return native_pgd_val(p4d.pgd);
353}
354#endif
355
356#if CONFIG_PGTABLE_LEVELS > 3
357typedef struct { pudval_t pud; } pud_t;
358
359static inline pud_t native_make_pud(pmdval_t val)
360{
361 return (pud_t) { val };
362}
363
364static inline pudval_t native_pud_val(pud_t pud)
365{
366 return pud.pud;
367}
368#else
369#include <asm-generic/pgtable-nopud.h>
370
371static inline pud_t native_make_pud(pudval_t val)
372{
373 return (pud_t) { .p4d.pgd = native_make_pgd(val) };
374}
375
376static inline pudval_t native_pud_val(pud_t pud)
377{
378 return native_pgd_val(pud.p4d.pgd);
379}
380#endif
381
382#if CONFIG_PGTABLE_LEVELS > 2
383typedef struct { pmdval_t pmd; } pmd_t;
384
385static inline pmd_t native_make_pmd(pmdval_t val)
386{
387 return (pmd_t) { val };
388}
389
390static inline pmdval_t native_pmd_val(pmd_t pmd)
391{
392 return pmd.pmd;
393}
394#else
395#include <asm-generic/pgtable-nopmd.h>
396
397static inline pmd_t native_make_pmd(pmdval_t val)
398{
399 return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) };
400}
401
402static inline pmdval_t native_pmd_val(pmd_t pmd)
403{
404 return native_pgd_val(pmd.pud.p4d.pgd);
405}
406#endif
407
408static inline p4dval_t p4d_pfn_mask(p4d_t p4d)
409{
410
411 return PTE_PFN_MASK;
412}
413
414static inline p4dval_t p4d_flags_mask(p4d_t p4d)
415{
416 return ~p4d_pfn_mask(p4d);
417}
418
419static inline p4dval_t p4d_flags(p4d_t p4d)
420{
421 return native_p4d_val(p4d) & p4d_flags_mask(p4d);
422}
423
424static inline pudval_t pud_pfn_mask(pud_t pud)
425{
426 if (native_pud_val(pud) & _PAGE_PSE)
427 return PHYSICAL_PUD_PAGE_MASK;
428 else
429 return PTE_PFN_MASK;
430}
431
432static inline pudval_t pud_flags_mask(pud_t pud)
433{
434 return ~pud_pfn_mask(pud);
435}
436
437static inline pudval_t pud_flags(pud_t pud)
438{
439 return native_pud_val(pud) & pud_flags_mask(pud);
440}
441
442static inline pmdval_t pmd_pfn_mask(pmd_t pmd)
443{
444 if (native_pmd_val(pmd) & _PAGE_PSE)
445 return PHYSICAL_PMD_PAGE_MASK;
446 else
447 return PTE_PFN_MASK;
448}
449
450static inline pmdval_t pmd_flags_mask(pmd_t pmd)
451{
452 return ~pmd_pfn_mask(pmd);
453}
454
455static inline pmdval_t pmd_flags(pmd_t pmd)
456{
457 return native_pmd_val(pmd) & pmd_flags_mask(pmd);
458}
459
460static inline pte_t native_make_pte(pteval_t val)
461{
462 return (pte_t) { .pte = val };
463}
464
465static inline pteval_t native_pte_val(pte_t pte)
466{
467 return pte.pte;
468}
469
470static inline pteval_t pte_flags(pte_t pte)
471{
472 return native_pte_val(pte) & PTE_FLAGS_MASK;
473}
474
475#define __pte2cm_idx(cb) \
476 ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) | \
477 (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) | \
478 (((cb) >> _PAGE_BIT_PWT) & 1))
479#define __cm_idx2pte(i) \
480 ((((i) & 4) << (_PAGE_BIT_PAT - 2)) | \
481 (((i) & 2) << (_PAGE_BIT_PCD - 1)) | \
482 (((i) & 1) << _PAGE_BIT_PWT))
483
484unsigned long cachemode2protval(enum page_cache_mode pcm);
485
486static inline pgprotval_t protval_4k_2_large(pgprotval_t val)
487{
488 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
489 ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
490}
491static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot)
492{
493 return __pgprot(protval_4k_2_large(pgprot_val(pgprot)));
494}
495static inline pgprotval_t protval_large_2_4k(pgprotval_t val)
496{
497 return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
498 ((val & _PAGE_PAT_LARGE) >>
499 (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
500}
501static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot)
502{
503 return __pgprot(protval_large_2_4k(pgprot_val(pgprot)));
504}
505
506
507typedef struct page *pgtable_t;
508
509extern pteval_t __supported_pte_mask;
510extern pteval_t __default_kernel_pte_mask;
511extern void set_nx(void);
512extern int nx_enabled;
513
514#define pgprot_writecombine pgprot_writecombine
515extern pgprot_t pgprot_writecombine(pgprot_t prot);
516
517#define pgprot_writethrough pgprot_writethrough
518extern pgprot_t pgprot_writethrough(pgprot_t prot);
519
520
521#define __HAVE_PFNMAP_TRACKING
522
523#define __HAVE_PHYS_MEM_ACCESS_PROT
524struct file;
525pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
526 unsigned long size, pgprot_t vma_prot);
527
528
529void set_pte_vaddr(unsigned long vaddr, pte_t pte);
530
531#ifdef CONFIG_X86_32
532extern void native_pagetable_init(void);
533#else
534#define native_pagetable_init paging_init
535#endif
536
537struct seq_file;
538extern void arch_report_meminfo(struct seq_file *m);
539
540enum pg_level {
541 PG_LEVEL_NONE,
542 PG_LEVEL_4K,
543 PG_LEVEL_2M,
544 PG_LEVEL_1G,
545 PG_LEVEL_512G,
546 PG_LEVEL_NUM
547};
548
549#ifdef CONFIG_PROC_FS
550extern void update_page_count(int level, unsigned long pages);
551#else
552static inline void update_page_count(int level, unsigned long pages) { }
553#endif
554
555
556
557
558
559
560
561extern pte_t *lookup_address(unsigned long address, unsigned int *level);
562extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
563 unsigned int *level);
564
565struct mm_struct;
566extern pte_t *lookup_address_in_mm(struct mm_struct *mm, unsigned long address,
567 unsigned int *level);
568extern pmd_t *lookup_pmd_address(unsigned long address);
569extern phys_addr_t slow_virt_to_phys(void *__address);
570extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn,
571 unsigned long address,
572 unsigned numpages,
573 unsigned long page_flags);
574extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
575 unsigned long numpages);
576#endif
577
578#endif
579