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mm: clarify that the function operates on hugepage pte
[mirror_ubuntu-artful-kernel.git] / arch / sparc / include / asm / pgtable_64.h
CommitLineData
f5e706ad
SR		 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
f5e706ad
SR		 15#include <linux/compiler.h>
16#include <linux/const.h>
17#include <asm/types.h>
18#include <asm/spitfire.h>
19#include <asm/asi.h>
f5e706ad
SR		 20#include <asm/page.h>
21#include <asm/processor.h>
22
23/* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB).
24 * The page copy blockops can use 0x6000000 to 0x8000000.
b18eb2d7
DM		 25 * The 8K TSB is mapped in the 0x8000000 to 0x8400000 range.
26 * The 4M TSB is mapped in the 0x8400000 to 0x8800000 range.
f5e706ad
SR		 27 * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
28 * The vmalloc area spans 0x100000000 to 0x200000000.
29 * Since modules need to be in the lowest 32-bits of the address space,
30 * we place them right before the OBP area from 0x10000000 to 0xf0000000.
31 * There is a single static kernel PMD which maps from 0x0 to address
32 * 0x400000000.
33 */
34#define TLBTEMP_BASE _AC(0x0000000006000000,UL)
b18eb2d7
DM		 35#define TSBMAP_8K_BASE _AC(0x0000000008000000,UL)
36#define TSBMAP_4M_BASE _AC(0x0000000008400000,UL)
f5e706ad
SR		 37#define MODULES_VADDR _AC(0x0000000010000000,UL)
38#define MODULES_LEN _AC(0x00000000e0000000,UL)
39#define MODULES_END _AC(0x00000000f0000000,UL)
40#define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL)
41#define HI_OBP_ADDRESS _AC(0x0000000100000000,UL)
42#define VMALLOC_START _AC(0x0000000100000000,UL)
bb4e6e85 43#define VMEMMAP_BASE VMALLOC_END
f5e706ad 44
f5e706ad
SR		 45/* PMD_SHIFT determines the size of the area a second-level page
46 * table can map
47 */
37b3a8ff 48#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
f5e706ad
SR		 49#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
50#define PMD_MASK (~(PMD_SIZE-1))
2b77933c 51#define PMD_BITS (PAGE_SHIFT - 3)
f5e706ad 52
ac55c768
DM		 53/* PUD_SHIFT determines the size of the area a third-level page
54 * table can map
55 */
56#define PUD_SHIFT (PMD_SHIFT + PMD_BITS)
57#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
58#define PUD_MASK (~(PUD_SIZE-1))
59#define PUD_BITS (PAGE_SHIFT - 3)
60
61/* PGDIR_SHIFT determines what a fourth-level page table entry can map */
62#define PGDIR_SHIFT (PUD_SHIFT + PUD_BITS)
f5e706ad
SR		 63#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
64#define PGDIR_MASK (~(PGDIR_SIZE-1))
2b77933c 65#define PGDIR_BITS (PAGE_SHIFT - 3)
f5e706ad 66
7c0fa0f2
DM		 67#if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS)
68#error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support
69#endif
70
ac55c768 71#if (PGDIR_SHIFT + PGDIR_BITS) != 53
56a70b8c
DM		 72#error Page table parameters do not cover virtual address space properly.
73#endif
74
9e695d2e
DM		 75#if (PMD_SHIFT != HPAGE_SHIFT)
76#error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages.
77#endif
78
f5e706ad
SR		 79#ifndef __ASSEMBLY__
80
bb4e6e85
DM		 81extern unsigned long VMALLOC_END;
82
83#define vmemmap ((struct page *)VMEMMAP_BASE)
84
f5e706ad
SR		 85#include <linux/sched.h>
86
0dd5b7b0 87bool kern_addr_valid(unsigned long addr);
26cf4325 88
f5e706ad 89/* Entries per page directory level. */
37b3a8ff 90#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
f5e706ad 91#define PTRS_PER_PMD (1UL << PMD_BITS)
ac55c768 92#define PTRS_PER_PUD (1UL << PUD_BITS)
f5e706ad
SR		 93#define PTRS_PER_PGD (1UL << PGDIR_BITS)
94
95/* Kernel has a separate 44bit address space. */
d016bf7e 96#define FIRST_USER_ADDRESS 0UL
f5e706ad 97
fe866433
DM		 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))
ac55c768
DM		 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))
fe866433
DM		 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))
f5e706ad
SR		 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*/
683d2fa6 113#define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */
a7b9403f 114#define _PAGE_PMD_HUGE _AC(0x0100000000000000,UL) /* Huge page */
0dd5b7b0 115#define _PAGE_PUD_HUGE _PAGE_PMD_HUGE
683d2fa6
DM		 116
117/* Advertise support for _PAGE_SPECIAL */
118#define __HAVE_ARCH_PTE_SPECIAL
f5e706ad
SR		 119
120/* SUN4U pte bits... */
121#define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */
122#define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */
123#define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */
124#define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */
125#define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */
126#define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */
127#define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
683d2fa6 128#define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */
a7b9403f 129#define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page */
f5e706ad
SR		 130#define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */
131#define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */
132#define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
133#define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */
134#define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
135#define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */
136#define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */
137#define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */
138#define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */
139#define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */
f5e706ad
SR		 140#define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
141#define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */
142#define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */
143#define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */
144#define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */
145#define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
146#define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
147#define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */
148#define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */
149#define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */
150
151/* SUN4V pte bits... */
152#define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */
153#define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
154#define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */
155#define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */
156#define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */
157#define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */
683d2fa6 158#define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */
a7b9403f 159#define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page */
f5e706ad
SR		 160#define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */
161#define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */
162#define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */
163#define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
164#define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
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 */
f5e706ad
SR		 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
f5e706ad
SR		 181#define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
182#define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
15b9350a 183
37b3a8ff
DM		 184#if REAL_HPAGE_SHIFT != 22
185#error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up
186#endif
187
f5e706ad
SR		 188#define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
189#define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
f5e706ad
SR		 190
191/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
192#define __P000 __pgprot(0)
193#define __P001 __pgprot(0)
194#define __P010 __pgprot(0)
195#define __P011 __pgprot(0)
196#define __P100 __pgprot(0)
197#define __P101 __pgprot(0)
198#define __P110 __pgprot(0)
199#define __P111 __pgprot(0)
200
201#define __S000 __pgprot(0)
202#define __S001 __pgprot(0)
203#define __S010 __pgprot(0)
204#define __S011 __pgprot(0)
205#define __S100 __pgprot(0)
206#define __S101 __pgprot(0)
207#define __S110 __pgprot(0)
208#define __S111 __pgprot(0)
209
210#ifndef __ASSEMBLY__
211
f05a6865 212pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
f5e706ad 213
f05a6865 214unsigned long pte_sz_bits(unsigned long size);
f5e706ad
SR		 215
216extern pgprot_t PAGE_KERNEL;
217extern pgprot_t PAGE_KERNEL_LOCKED;
218extern pgprot_t PAGE_COPY;
219extern pgprot_t PAGE_SHARED;
220
221/* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
222extern unsigned long _PAGE_IE;
223extern unsigned long _PAGE_E;
224extern unsigned long _PAGE_CACHE;
225
226extern unsigned long pg_iobits;
227extern unsigned long _PAGE_ALL_SZ_BITS;
f5e706ad
SR		 228
229extern struct page *mem_map_zero;
230#define ZERO_PAGE(vaddr) (mem_map_zero)
231
232/* PFNs are real physical page numbers. However, mem_map only begins to record
233 * per-page information starting at pfn_base. This is to handle systems where
234 * the first physical page in the machine is at some huge physical address,
235 * such as 4GB. This is common on a partitioned E10000, for example.
236 */
237static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
238{
239 unsigned long paddr = pfn << PAGE_SHIFT;
15b9350a
DM		 240
241 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
242 return __pte(paddr | pgprot_val(prot));
f5e706ad
SR		 243}
244#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
245
9e695d2e 246#ifdef CONFIG_TRANSPARENT_HUGEPAGE
a7b9403f 247static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
9e695d2e 248{
a7b9403f
DM		 249 pte_t pte = pfn_pte(page_nr, pgprot);
250
251 return __pmd(pte_val(pte));
9e695d2e 252}
a7b9403f 253#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
9e695d2e
DM		 254#endif
255
f5e706ad
SR		 256/* This one can be done with two shifts. */
257static inline unsigned long pte_pfn(pte_t pte)
258{
259 unsigned long ret;
260
261 __asm__ __volatile__(
262 "\n661: sllx %1, %2, %0\n"
263 " srlx %0, %3, %0\n"
264 " .section .sun4v_2insn_patch, \"ax\"\n"
265 " .word 661b\n"
266 " sllx %1, %4, %0\n"
267 " srlx %0, %5, %0\n"
268 " .previous\n"
269 : "=r" (ret)
270 : "r" (pte_val(pte)),
271 "i" (21), "i" (21 + PAGE_SHIFT),
272 "i" (8), "i" (8 + PAGE_SHIFT));
273
274 return ret;
275}
276#define pte_page(x) pfn_to_page(pte_pfn(x))
277
278static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
279{
280 unsigned long mask, tmp;
281
eaf85da8
DM		 282 /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7)
283 * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8)
f5e706ad
SR		 284 *
285 * Even if we use negation tricks the result is still a 6
286 * instruction sequence, so don't try to play fancy and just
287 * do the most straightforward implementation.
288 *
289 * Note: We encode this into 3 sun4v 2-insn patch sequences.
290 */
291
15b9350a 292 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
f5e706ad
SR		 293 __asm__ __volatile__(
294 "\n661: sethi %%uhi(%2), %1\n"
295 " sethi %%hi(%2), %0\n"
296 "\n662: or %1, %%ulo(%2), %1\n"
297 " or %0, %%lo(%2), %0\n"
298 "\n663: sllx %1, 32, %1\n"
299 " or %0, %1, %0\n"
300 " .section .sun4v_2insn_patch, \"ax\"\n"
301 " .word 661b\n"
302 " sethi %%uhi(%3), %1\n"
303 " sethi %%hi(%3), %0\n"
304 " .word 662b\n"
305 " or %1, %%ulo(%3), %1\n"
306 " or %0, %%lo(%3), %0\n"
307 " .word 663b\n"
308 " sllx %1, 32, %1\n"
309 " or %0, %1, %0\n"
310 " .previous\n"
494e5b6f
KA		 311 " .section .sun_m7_2insn_patch, \"ax\"\n"
312 " .word 661b\n"
313 " sethi %%uhi(%4), %1\n"
314 " sethi %%hi(%4), %0\n"
315 " .word 662b\n"
316 " or %1, %%ulo(%4), %1\n"
317 " or %0, %%lo(%4), %0\n"
318 " .word 663b\n"
319 " sllx %1, 32, %1\n"
320 " or %0, %1, %0\n"
321 " .previous\n"
f5e706ad
SR		 322 : "=r" (mask), "=r" (tmp)
323 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
eaf85da8 324 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U |
a7b9403f 325 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U),
f5e706ad 326 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
eaf85da8 327 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V |
494e5b6f
KA		 328 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V),
329 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
330 _PAGE_CP_4V | _PAGE_E_4V |
a7b9403f 331 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V));
f5e706ad
SR		 332
333 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
334}
335
a7b9403f
DM		 336#ifdef CONFIG_TRANSPARENT_HUGEPAGE
337static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
338{
339 pte_t pte = __pte(pmd_val(pmd));
340
341 pte = pte_modify(pte, newprot);
342
343 return __pmd(pte_val(pte));
344}
345#endif
346
f5e706ad
SR		 347static inline pgprot_t pgprot_noncached(pgprot_t prot)
348{
349 unsigned long val = pgprot_val(prot);
350
351 __asm__ __volatile__(
352 "\n661: andn %0, %2, %0\n"
353 " or %0, %3, %0\n"
354 " .section .sun4v_2insn_patch, \"ax\"\n"
355 " .word 661b\n"
356 " andn %0, %4, %0\n"
357 " or %0, %5, %0\n"
358 " .previous\n"
494e5b6f
KA		 359 " .section .sun_m7_2insn_patch, \"ax\"\n"
360 " .word 661b\n"
361 " andn %0, %6, %0\n"
362 " or %0, %5, %0\n"
363 " .previous\n"
f5e706ad
SR		 364 : "=r" (val)
365 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
494e5b6f
KA		 366 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V),
367 "i" (_PAGE_CP_4V));
f5e706ad
SR		 368
369 return __pgprot(val);
370}
371/* Various pieces of code check for platform support by ifdef testing
372 * on "pgprot_noncached". That's broken and should be fixed, but for
373 * now...
374 */
375#define pgprot_noncached pgprot_noncached
376
a7b9403f 377#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
f5e706ad
SR		 378static inline pte_t pte_mkhuge(pte_t pte)
379{
380 unsigned long mask;
381
382 __asm__ __volatile__(
383 "\n661: sethi %%uhi(%1), %0\n"
384 " sllx %0, 32, %0\n"
385 " .section .sun4v_2insn_patch, \"ax\"\n"
386 " .word 661b\n"
387 " mov %2, %0\n"
388 " nop\n"
389 " .previous\n"
390 : "=r" (mask)
391 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
392
393 return __pte(pte_val(pte) | mask);
394}
a7b9403f
DM		 395#ifdef CONFIG_TRANSPARENT_HUGEPAGE
396static inline pmd_t pmd_mkhuge(pmd_t pmd)
397{
398 pte_t pte = __pte(pmd_val(pmd));
399
400 pte = pte_mkhuge(pte);
401 pte_val(pte) |= _PAGE_PMD_HUGE;
402
403 return __pmd(pte_val(pte));
404}
405#endif
f5e706ad
SR		 406#endif
407
408static inline pte_t pte_mkdirty(pte_t pte)
409{
410 unsigned long val = pte_val(pte), tmp;
411
412 __asm__ __volatile__(
413 "\n661: or %0, %3, %0\n"
414 " nop\n"
415 "\n662: nop\n"
416 " nop\n"
417 " .section .sun4v_2insn_patch, \"ax\"\n"
418 " .word 661b\n"
419 " sethi %%uhi(%4), %1\n"
420 " sllx %1, 32, %1\n"
421 " .word 662b\n"
422 " or %1, %%lo(%4), %1\n"
423 " or %0, %1, %0\n"
424 " .previous\n"
425 : "=r" (val), "=r" (tmp)
426 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
427 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
428
429 return __pte(val);
430}
431
432static inline pte_t pte_mkclean(pte_t pte)
433{
434 unsigned long val = pte_val(pte), tmp;
435
436 __asm__ __volatile__(
437 "\n661: andn %0, %3, %0\n"
438 " nop\n"
439 "\n662: nop\n"
440 " nop\n"
441 " .section .sun4v_2insn_patch, \"ax\"\n"
442 " .word 661b\n"
443 " sethi %%uhi(%4), %1\n"
444 " sllx %1, 32, %1\n"
445 " .word 662b\n"
446 " or %1, %%lo(%4), %1\n"
447 " andn %0, %1, %0\n"
448 " .previous\n"
449 : "=r" (val), "=r" (tmp)
450 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
451 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
452
453 return __pte(val);
454}
455
456static inline pte_t pte_mkwrite(pte_t pte)
457{
458 unsigned long val = pte_val(pte), mask;
459
460 __asm__ __volatile__(
461 "\n661: mov %1, %0\n"
462 " nop\n"
463 " .section .sun4v_2insn_patch, \"ax\"\n"
464 " .word 661b\n"
465 " sethi %%uhi(%2), %0\n"
466 " sllx %0, 32, %0\n"
467 " .previous\n"
468 : "=r" (mask)
469 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
470
471 return __pte(val | mask);
472}
473
474static inline pte_t pte_wrprotect(pte_t pte)
475{
476 unsigned long val = pte_val(pte), tmp;
477
478 __asm__ __volatile__(
479 "\n661: andn %0, %3, %0\n"
480 " nop\n"
481 "\n662: nop\n"
482 " nop\n"
483 " .section .sun4v_2insn_patch, \"ax\"\n"
484 " .word 661b\n"
485 " sethi %%uhi(%4), %1\n"
486 " sllx %1, 32, %1\n"
487 " .word 662b\n"
488 " or %1, %%lo(%4), %1\n"
489 " andn %0, %1, %0\n"
490 " .previous\n"
491 : "=r" (val), "=r" (tmp)
492 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
493 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
494
495 return __pte(val);
496}
497
498static inline pte_t pte_mkold(pte_t pte)
499{
500 unsigned long mask;
501
502 __asm__ __volatile__(
503 "\n661: mov %1, %0\n"
504 " nop\n"
505 " .section .sun4v_2insn_patch, \"ax\"\n"
506 " .word 661b\n"
507 " sethi %%uhi(%2), %0\n"
508 " sllx %0, 32, %0\n"
509 " .previous\n"
510 : "=r" (mask)
511 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
512
513 mask |= _PAGE_R;
514
515 return __pte(pte_val(pte) & ~mask);
516}
517
518static inline pte_t pte_mkyoung(pte_t pte)
519{
520 unsigned long mask;
521
522 __asm__ __volatile__(
523 "\n661: mov %1, %0\n"
524 " nop\n"
525 " .section .sun4v_2insn_patch, \"ax\"\n"
526 " .word 661b\n"
527 " sethi %%uhi(%2), %0\n"
528 " sllx %0, 32, %0\n"
529 " .previous\n"
530 : "=r" (mask)
531 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
532
533 mask |= _PAGE_R;
534
535 return __pte(pte_val(pte) | mask);
536}
537
538static inline pte_t pte_mkspecial(pte_t pte)
539{
683d2fa6 540 pte_val(pte) |= _PAGE_SPECIAL;
f5e706ad
SR		 541 return pte;
542}
543
544static inline unsigned long pte_young(pte_t pte)
545{
546 unsigned long mask;
547
548 __asm__ __volatile__(
549 "\n661: mov %1, %0\n"
550 " nop\n"
551 " .section .sun4v_2insn_patch, \"ax\"\n"
552 " .word 661b\n"
553 " sethi %%uhi(%2), %0\n"
554 " sllx %0, 32, %0\n"
555 " .previous\n"
556 : "=r" (mask)
557 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
558
559 return (pte_val(pte) & mask);
560}
561
562static inline unsigned long pte_dirty(pte_t pte)
563{
564 unsigned long mask;
565
566 __asm__ __volatile__(
567 "\n661: mov %1, %0\n"
568 " nop\n"
569 " .section .sun4v_2insn_patch, \"ax\"\n"
570 " .word 661b\n"
571 " sethi %%uhi(%2), %0\n"
572 " sllx %0, 32, %0\n"
573 " .previous\n"
574 : "=r" (mask)
575 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
576
577 return (pte_val(pte) & mask);
578}
579
580static inline unsigned long pte_write(pte_t pte)
581{
582 unsigned long mask;
583
584 __asm__ __volatile__(
585 "\n661: mov %1, %0\n"
586 " nop\n"
587 " .section .sun4v_2insn_patch, \"ax\"\n"
588 " .word 661b\n"
589 " sethi %%uhi(%2), %0\n"
590 " sllx %0, 32, %0\n"
591 " .previous\n"
592 : "=r" (mask)
593 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
594
595 return (pte_val(pte) & mask);
596}
597
598static inline unsigned long pte_exec(pte_t pte)
599{
600 unsigned long mask;
601
602 __asm__ __volatile__(
603 "\n661: sethi %%hi(%1), %0\n"
604 " .section .sun4v_1insn_patch, \"ax\"\n"
605 " .word 661b\n"
606 " mov %2, %0\n"
607 " .previous\n"
608 : "=r" (mask)
609 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
610
611 return (pte_val(pte) & mask);
612}
613
f5e706ad
SR		 614static inline unsigned long pte_present(pte_t pte)
615{
616 unsigned long val = pte_val(pte);
617
618 __asm__ __volatile__(
619 "\n661: and %0, %2, %0\n"
620 " .section .sun4v_1insn_patch, \"ax\"\n"
621 " .word 661b\n"
622 " and %0, %3, %0\n"
623 " .previous\n"
624 : "=r" (val)
625 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
626
627 return val;
628}
629
4a9d1946 630#define pte_accessible pte_accessible
20841405 631static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
4a9d1946
DM		 632{
633 return pte_val(a) & _PAGE_VALID;
634}
635
683d2fa6 636static inline unsigned long pte_special(pte_t pte)
f5e706ad 637{
683d2fa6 638 return pte_val(pte) & _PAGE_SPECIAL;
f5e706ad
SR		 639}
640
a7b9403f 641static inline unsigned long pmd_large(pmd_t pmd)
89a77915 642{
a7b9403f
DM		 643 pte_t pte = __pte(pmd_val(pmd));
644
04df419d 645 return pte_val(pte) & _PAGE_PMD_HUGE;
89a77915
DM		 646}
647
0dd5b7b0 648static inline unsigned long pmd_pfn(pmd_t pmd)
9e695d2e 649{
a7b9403f
DM		 650 pte_t pte = __pte(pmd_val(pmd));
651
0dd5b7b0 652 return pte_pfn(pte);
9e695d2e
DM		 653}
654
0dd5b7b0 655#ifdef CONFIG_TRANSPARENT_HUGEPAGE
c164e038
KS		 656static inline unsigned long pmd_dirty(pmd_t pmd)
657{
658 pte_t pte = __pte(pmd_val(pmd));
659
660 return pte_dirty(pte);
661}
662
0dd5b7b0 663static inline unsigned long pmd_young(pmd_t pmd)
9e695d2e 664{
a7b9403f
DM		 665 pte_t pte = __pte(pmd_val(pmd));
666
0dd5b7b0 667 return pte_young(pte);
9e695d2e
DM		 668}
669
0dd5b7b0 670static inline unsigned long pmd_write(pmd_t pmd)
9e695d2e 671{
a7b9403f 672 pte_t pte = __pte(pmd_val(pmd));
9e695d2e 673
0dd5b7b0 674 return pte_write(pte);
9e695d2e
DM		 675}
676
a7b9403f 677static inline unsigned long pmd_trans_huge(pmd_t pmd)
9e695d2e 678{
a7b9403f
DM		 679 pte_t pte = __pte(pmd_val(pmd));
680
681 return pte_val(pte) & _PAGE_PMD_HUGE;
9e695d2e
DM		 682}
683
a7b9403f 684static inline unsigned long pmd_trans_splitting(pmd_t pmd)
9e695d2e 685{
a7b9403f
DM		 686 pte_t pte = __pte(pmd_val(pmd));
687
688 return pmd_trans_huge(pmd) && pte_special(pte);
9e695d2e
DM		 689}
690
691#define has_transparent_hugepage() 1
692
693static inline pmd_t pmd_mkold(pmd_t pmd)
694{
a7b9403f
DM		 695 pte_t pte = __pte(pmd_val(pmd));
696
697 pte = pte_mkold(pte);
698
699 return __pmd(pte_val(pte));
9e695d2e
DM		 700}
701
702static inline pmd_t pmd_wrprotect(pmd_t pmd)
703{
a7b9403f
DM		 704 pte_t pte = __pte(pmd_val(pmd));
705
706 pte = pte_wrprotect(pte);
707
708 return __pmd(pte_val(pte));
9e695d2e
DM		 709}
710
711static inline pmd_t pmd_mkdirty(pmd_t pmd)
712{
a7b9403f
DM		 713 pte_t pte = __pte(pmd_val(pmd));
714
715 pte = pte_mkdirty(pte);
716
717 return __pmd(pte_val(pte));
9e695d2e
DM		 718}
719
720static inline pmd_t pmd_mkyoung(pmd_t pmd)
721{
a7b9403f
DM		 722 pte_t pte = __pte(pmd_val(pmd));
723
724 pte = pte_mkyoung(pte);
725
726 return __pmd(pte_val(pte));
9e695d2e
DM		 727}
728
729static inline pmd_t pmd_mkwrite(pmd_t pmd)
730{
a7b9403f
DM		 731 pte_t pte = __pte(pmd_val(pmd));
732
733 pte = pte_mkwrite(pte);
734
735 return __pmd(pte_val(pte));
9e695d2e
DM		 736}
737
9e695d2e
DM		 738static inline pmd_t pmd_mksplitting(pmd_t pmd)
739{
a7b9403f
DM		 740 pte_t pte = __pte(pmd_val(pmd));
741
742 pte = pte_mkspecial(pte);
743
744 return __pmd(pte_val(pte));
9e695d2e
DM		 745}
746
a7b9403f
DM		 747static inline pgprot_t pmd_pgprot(pmd_t entry)
748{
749 unsigned long val = pmd_val(entry);
750
751 return __pgprot(val);
752}
9e695d2e
DM		 753#endif
754
755static inline int pmd_present(pmd_t pmd)
756{
2b77933c 757 return pmd_val(pmd) != 0UL;
9e695d2e
DM		 758}
759
760#define pmd_none(pmd) (!pmd_val(pmd))
761
26cf4325
DM		 762/* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is
763 * very simple, it's just the physical address. PTE tables are of
764 * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
765 * the top bits outside of the range of any physical address size we
766 * support are clear as well. We also validate the physical itself.
767 */
0dd5b7b0 768#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
26cf4325
DM		 769
770#define pud_none(pud) (!pud_val(pud))
771
0dd5b7b0 772#define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK)
26cf4325 773
ac55c768
DM		 774#define pgd_none(pgd) (!pgd_val(pgd))
775
0dd5b7b0 776#define pgd_bad(pgd) (pgd_val(pgd) & ~PAGE_MASK)
ac55c768 777
9e695d2e 778#ifdef CONFIG_TRANSPARENT_HUGEPAGE
f05a6865
SR		 779void set_pmd_at(struct mm_struct *mm, unsigned long addr,
780 pmd_t *pmdp, pmd_t pmd);
9e695d2e
DM		 781#else
782static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
783 pmd_t *pmdp, pmd_t pmd)
784{
785 *pmdp = pmd;
786}
787#endif
788
789static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
790{
a7b9403f 791 unsigned long val = __pa((unsigned long) (ptep));
9e695d2e
DM		 792
793 pmd_val(*pmdp) = val;
794}
795
f5e706ad 796#define pud_set(pudp, pmdp) \
a7b9403f 797 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
9e695d2e
DM		 798static inline unsigned long __pmd_page(pmd_t pmd)
799{
a7b9403f
DM		 800 pte_t pte = __pte(pmd_val(pmd));
801 unsigned long pfn;
802
803 pfn = pte_pfn(pte);
804
805 return ((unsigned long) __va(pfn << PAGE_SHIFT));
9e695d2e 806}
f5e706ad
SR		 807#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
808#define pud_page_vaddr(pud) \
a7b9403f 809 ((unsigned long) __va(pud_val(pud)))
f5e706ad 810#define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud))
2b77933c 811#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
f5e706ad 812#define pud_present(pud) (pud_val(pud) != 0U)
2b77933c 813#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
ac55c768
DM		 814#define pgd_page_vaddr(pgd) \
815 ((unsigned long) __va(pgd_val(pgd)))
816#define pgd_present(pgd) (pgd_val(pgd) != 0U)
817#define pgd_clear(pgdp) (pgd_val(*(pgd)) = 0UL)
f5e706ad 818
0dd5b7b0
DM		 819static inline unsigned long pud_large(pud_t pud)
820{
821 pte_t pte = __pte(pud_val(pud));
822
823 return pte_val(pte) & _PAGE_PMD_HUGE;
824}
825
826static inline unsigned long pud_pfn(pud_t pud)
827{
828 pte_t pte = __pte(pud_val(pud));
829
830 return pte_pfn(pte);
831}
832
f5e706ad
SR		 833/* Same in both SUN4V and SUN4U. */
834#define pte_none(pte) (!pte_val(pte))
835
ac55c768
DM		 836#define pgd_set(pgdp, pudp) \
837 (pgd_val(*(pgdp)) = (__pa((unsigned long) (pudp))))
838
f5e706ad
SR		 839/* to find an entry in a page-table-directory. */
840#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
841#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
842
843/* to find an entry in a kernel page-table-directory */
844#define pgd_offset_k(address) pgd_offset(&init_mm, address)
845
ac55c768
DM		 846/* Find an entry in the third-level page table.. */
847#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
848#define pud_offset(pgdp, address) \
849 ((pud_t *) pgd_page_vaddr(*(pgdp)) + pud_index(address))
850
f5e706ad
SR		 851/* Find an entry in the second-level page table.. */
852#define pmd_offset(pudp, address) \
853 ((pmd_t *) pud_page_vaddr(*(pudp)) + \
854 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
855
856/* Find an entry in the third-level page table.. */
857#define pte_index(dir, address) \
858 ((pte_t *) __pmd_page(*(dir)) + \
859 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
860#define pte_offset_kernel pte_index
861#define pte_offset_map pte_index
f5e706ad 862#define pte_unmap(pte) do { } while (0)
f5e706ad
SR		 863
864/* Actual page table PTE updates. */
f05a6865
SR		 865void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
866 pte_t *ptep, pte_t orig, int fullmm);
f5e706ad 867
8809aa2d
AK		 868#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
869static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
870 unsigned long addr,
871 pmd_t *pmdp)
9e695d2e
DM		 872{
873 pmd_t pmd = *pmdp;
2b77933c 874 set_pmd_at(mm, addr, pmdp, __pmd(0UL));
9e695d2e
DM		 875 return pmd;
876}
877
90f08e39
PZ		 878static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
879 pte_t *ptep, pte_t pte, int fullmm)
f5e706ad
SR		 880{
881 pte_t orig = *ptep;
882
883 *ptep = pte;
884
885 /* It is more efficient to let flush_tlb_kernel_range()
886 * handle init_mm tlb flushes.
887 *
888 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
889 * and SUN4V pte layout, so this inline test is fine.
890 */
20841405 891 if (likely(mm != &init_mm) && pte_accessible(mm, orig))
90f08e39 892 tlb_batch_add(mm, addr, ptep, orig, fullmm);
f5e706ad
SR		 893}
894
90f08e39
PZ		 895#define set_pte_at(mm,addr,ptep,pte) \
896 __set_pte_at((mm), (addr), (ptep), (pte), 0)
897
f5e706ad
SR		 898#define pte_clear(mm,addr,ptep) \
899 set_pte_at((mm), (addr), (ptep), __pte(0UL))
900
90f08e39
PZ		 901#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
902#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
903 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
904
f5e706ad
SR		 905#ifdef DCACHE_ALIASING_POSSIBLE
906#define __HAVE_ARCH_MOVE_PTE
907#define move_pte(pte, prot, old_addr, new_addr) \
908({ \
909 pte_t newpte = (pte); \
910 if (tlb_type != hypervisor && pte_present(pte)) { \
911 unsigned long this_pfn = pte_pfn(pte); \
912 \
913 if (pfn_valid(this_pfn) && \
914 (((old_addr) ^ (new_addr)) & (1 << 13))) \
915 flush_dcache_page_all(current->mm, \
916 pfn_to_page(this_pfn)); \
917 } \
918 newpte; \
919})
920#endif
921
2b77933c 922extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
f5e706ad 923
f05a6865
SR		 924void paging_init(void);
925unsigned long find_ecache_flush_span(unsigned long size);
f5e706ad 926
cb1b8209 927struct seq_file;
f05a6865 928void mmu_info(struct seq_file *);
cb1b8209 929
f5e706ad 930struct vm_area_struct;
f05a6865 931void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
9e695d2e 932#ifdef CONFIG_TRANSPARENT_HUGEPAGE
f05a6865
SR		 933void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
934 pmd_t *pmd);
9e695d2e 935
51e5ef1b
DM		 936#define __HAVE_ARCH_PMDP_INVALIDATE
937extern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
938 pmd_t *pmdp);
939
9e695d2e 940#define __HAVE_ARCH_PGTABLE_DEPOSIT
f05a6865
SR		 941void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
942 pgtable_t pgtable);
9e695d2e
DM		 943
944#define __HAVE_ARCH_PGTABLE_WITHDRAW
f05a6865 945pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
9e695d2e 946#endif
f5e706ad
SR		 947
948/* Encode and de-code a swap entry */
949#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
950#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
951#define __swp_entry(type, offset) \
952 ( (swp_entry_t) \
953 { \
954 (((long)(type) << PAGE_SHIFT) | \
955 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
956 } )
957#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
958#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
959
f05a6865 960int page_in_phys_avail(unsigned long paddr);
f5e706ad 961
f5e706ad
SR		 962/*
963 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
964 * its high 4 bits. These macros/functions put it there or get it from there.
965 */
966#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
967#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
968#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
969
f05a6865
SR		 970int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
971 unsigned long, pgprot_t);
3e37fd31
DM		 972
973static inline int io_remap_pfn_range(struct vm_area_struct *vma,
974 unsigned long from, unsigned long pfn,
975 unsigned long size, pgprot_t prot)
976{
977 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
978 int space = GET_IOSPACE(pfn);
979 unsigned long phys_base;
980
981 phys_base = offset | (((unsigned long) space) << 32UL);
982
983 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
984}
40d158e6 985#define io_remap_pfn_range io_remap_pfn_range
3e37fd31 986
f36391d2 987#include <asm/tlbflush.h>
f5e706ad
SR		 988#include <asm-generic/pgtable.h>
989
990/* We provide our own get_unmapped_area to cope with VA holes and
991 * SHM area cache aliasing for userland.
992 */
993#define HAVE_ARCH_UNMAPPED_AREA
994#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
995
996/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
997 * the largest alignment possible such that larget PTEs can be used.
998 */
f05a6865
SR		 999unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
1000 unsigned long, unsigned long,
1001 unsigned long);
f5e706ad
SR		 1002#define HAVE_ARCH_FB_UNMAPPED_AREA
1003
f05a6865
SR		 1004void pgtable_cache_init(void);
1005void sun4v_register_fault_status(void);
1006void sun4v_ktsb_register(void);
1007void __init cheetah_ecache_flush_init(void);
1008void sun4v_patch_tlb_handlers(void);
f5e706ad
SR		 1009
1010extern unsigned long cmdline_memory_size;
1011
f05a6865 1012asmlinkage void do_sparc64_fault(struct pt_regs *regs);
b539c467 1013
f5e706ad
SR		 1014#endif /* !(__ASSEMBLY__) */
1015
1016#endif /* !(_SPARC64_PGTABLE_H) */
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