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