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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
90bool 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#ifndef __ASSEMBLY__
191
192pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
193
194unsigned long pte_sz_bits(unsigned long size);
195
196extern pgprot_t PAGE_KERNEL;
197extern pgprot_t PAGE_KERNEL_LOCKED;
198extern pgprot_t PAGE_COPY;
199extern pgprot_t PAGE_SHARED;
200
201/* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */
202extern unsigned long _PAGE_IE;
203extern unsigned long _PAGE_E;
204extern unsigned long _PAGE_CACHE;
205
206extern unsigned long pg_iobits;
207extern unsigned long _PAGE_ALL_SZ_BITS;
208
209extern struct page *mem_map_zero;
210#define ZERO_PAGE(vaddr) (mem_map_zero)
211
212/* PFNs are real physical page numbers. However, mem_map only begins to record
213 * per-page information starting at pfn_base. This is to handle systems where
214 * the first physical page in the machine is at some huge physical address,
215 * such as 4GB. This is common on a partitioned E10000, for example.
216 */
217static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
218{
219 unsigned long paddr = pfn << PAGE_SHIFT;
220
221 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
222 return __pte(paddr | pgprot_val(prot));
223}
224#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
225
226#ifdef CONFIG_TRANSPARENT_HUGEPAGE
227static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
228{
229 pte_t pte = pfn_pte(page_nr, pgprot);
230
231 return __pmd(pte_val(pte));
232}
233#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
234#endif
235
236/* This one can be done with two shifts. */
237static inline unsigned long pte_pfn(pte_t pte)
238{
239 unsigned long ret;
240
241 __asm__ __volatile__(
242 "\n661: sllx %1, %2, %0\n"
243 " srlx %0, %3, %0\n"
244 " .section .sun4v_2insn_patch, \"ax\"\n"
245 " .word 661b\n"
246 " sllx %1, %4, %0\n"
247 " srlx %0, %5, %0\n"
248 " .previous\n"
249 : "=r" (ret)
250 : "r" (pte_val(pte)),
251 "i" (21), "i" (21 + PAGE_SHIFT),
252 "i" (8), "i" (8 + PAGE_SHIFT));
253
254 return ret;
255}
256#define pte_page(x) pfn_to_page(pte_pfn(x))
257
258static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
259{
260 unsigned long mask, tmp;
261
262 /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7)
263 * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8)
264 *
265 * Even if we use negation tricks the result is still a 6
266 * instruction sequence, so don't try to play fancy and just
267 * do the most straightforward implementation.
268 *
269 * Note: We encode this into 3 sun4v 2-insn patch sequences.
270 */
271
272 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
273 __asm__ __volatile__(
274 "\n661: sethi %%uhi(%2), %1\n"
275 " sethi %%hi(%2), %0\n"
276 "\n662: or %1, %%ulo(%2), %1\n"
277 " or %0, %%lo(%2), %0\n"
278 "\n663: sllx %1, 32, %1\n"
279 " or %0, %1, %0\n"
280 " .section .sun4v_2insn_patch, \"ax\"\n"
281 " .word 661b\n"
282 " sethi %%uhi(%3), %1\n"
283 " sethi %%hi(%3), %0\n"
284 " .word 662b\n"
285 " or %1, %%ulo(%3), %1\n"
286 " or %0, %%lo(%3), %0\n"
287 " .word 663b\n"
288 " sllx %1, 32, %1\n"
289 " or %0, %1, %0\n"
290 " .previous\n"
291 " .section .sun_m7_2insn_patch, \"ax\"\n"
292 " .word 661b\n"
293 " sethi %%uhi(%4), %1\n"
294 " sethi %%hi(%4), %0\n"
295 " .word 662b\n"
296 " or %1, %%ulo(%4), %1\n"
297 " or %0, %%lo(%4), %0\n"
298 " .word 663b\n"
299 " sllx %1, 32, %1\n"
300 " or %0, %1, %0\n"
301 " .previous\n"
302 : "=r" (mask), "=r" (tmp)
303 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
304 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U |
305 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U),
306 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
307 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V |
308 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V),
309 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
310 _PAGE_CP_4V | _PAGE_E_4V |
311 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V));
312
313 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
314}
315
316#ifdef CONFIG_TRANSPARENT_HUGEPAGE
317static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
318{
319 pte_t pte = __pte(pmd_val(pmd));
320
321 pte = pte_modify(pte, newprot);
322
323 return __pmd(pte_val(pte));
324}
325#endif
326
327static inline pgprot_t pgprot_noncached(pgprot_t prot)
328{
329 unsigned long val = pgprot_val(prot);
330
331 __asm__ __volatile__(
332 "\n661: andn %0, %2, %0\n"
333 " or %0, %3, %0\n"
334 " .section .sun4v_2insn_patch, \"ax\"\n"
335 " .word 661b\n"
336 " andn %0, %4, %0\n"
337 " or %0, %5, %0\n"
338 " .previous\n"
339 " .section .sun_m7_2insn_patch, \"ax\"\n"
340 " .word 661b\n"
341 " andn %0, %6, %0\n"
342 " or %0, %5, %0\n"
343 " .previous\n"
344 : "=r" (val)
345 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
346 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V),
347 "i" (_PAGE_CP_4V));
348
349 return __pgprot(val);
350}
351/* Various pieces of code check for platform support by ifdef testing
352 * on "pgprot_noncached". That's broken and should be fixed, but for
353 * now...
354 */
355#define pgprot_noncached pgprot_noncached
356
357#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
358pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags);
359#define arch_make_huge_pte arch_make_huge_pte
360static inline unsigned long __pte_default_huge_mask(void)
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 mask;
376}
377
378static inline pte_t pte_mkhuge(pte_t pte)
379{
380 return __pte(pte_val(pte) | __pte_default_huge_mask());
381}
382
383static inline bool is_default_hugetlb_pte(pte_t pte)
384{
385 unsigned long mask = __pte_default_huge_mask();
386
387 return (pte_val(pte) & mask) == mask;
388}
389
390static inline bool is_hugetlb_pmd(pmd_t pmd)
391{
392 return !!(pmd_val(pmd) & _PAGE_PMD_HUGE);
393}
394
395static inline bool is_hugetlb_pud(pud_t pud)
396{
397 return !!(pud_val(pud) & _PAGE_PUD_HUGE);
398}
399
400#ifdef CONFIG_TRANSPARENT_HUGEPAGE
401static inline pmd_t pmd_mkhuge(pmd_t pmd)
402{
403 pte_t pte = __pte(pmd_val(pmd));
404
405 pte = pte_mkhuge(pte);
406 pte_val(pte) |= _PAGE_PMD_HUGE;
407
408 return __pmd(pte_val(pte));
409}
410#endif
411#else
412static inline bool is_hugetlb_pte(pte_t pte)
413{
414 return false;
415}
416#endif
417
418static inline pte_t pte_mkdirty(pte_t pte)
419{
420 unsigned long val = pte_val(pte), tmp;
421
422 __asm__ __volatile__(
423 "\n661: or %0, %3, %0\n"
424 " nop\n"
425 "\n662: nop\n"
426 " nop\n"
427 " .section .sun4v_2insn_patch, \"ax\"\n"
428 " .word 661b\n"
429 " sethi %%uhi(%4), %1\n"
430 " sllx %1, 32, %1\n"
431 " .word 662b\n"
432 " or %1, %%lo(%4), %1\n"
433 " or %0, %1, %0\n"
434 " .previous\n"
435 : "=r" (val), "=r" (tmp)
436 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
437 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
438
439 return __pte(val);
440}
441
442static inline pte_t pte_mkclean(pte_t pte)
443{
444 unsigned long val = pte_val(pte), tmp;
445
446 __asm__ __volatile__(
447 "\n661: andn %0, %3, %0\n"
448 " nop\n"
449 "\n662: nop\n"
450 " nop\n"
451 " .section .sun4v_2insn_patch, \"ax\"\n"
452 " .word 661b\n"
453 " sethi %%uhi(%4), %1\n"
454 " sllx %1, 32, %1\n"
455 " .word 662b\n"
456 " or %1, %%lo(%4), %1\n"
457 " andn %0, %1, %0\n"
458 " .previous\n"
459 : "=r" (val), "=r" (tmp)
460 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
461 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
462
463 return __pte(val);
464}
465
466static inline pte_t pte_mkwrite(pte_t pte)
467{
468 unsigned long val = pte_val(pte), mask;
469
470 __asm__ __volatile__(
471 "\n661: mov %1, %0\n"
472 " nop\n"
473 " .section .sun4v_2insn_patch, \"ax\"\n"
474 " .word 661b\n"
475 " sethi %%uhi(%2), %0\n"
476 " sllx %0, 32, %0\n"
477 " .previous\n"
478 : "=r" (mask)
479 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
480
481 return __pte(val | mask);
482}
483
484static inline pte_t pte_wrprotect(pte_t pte)
485{
486 unsigned long val = pte_val(pte), tmp;
487
488 __asm__ __volatile__(
489 "\n661: andn %0, %3, %0\n"
490 " nop\n"
491 "\n662: nop\n"
492 " nop\n"
493 " .section .sun4v_2insn_patch, \"ax\"\n"
494 " .word 661b\n"
495 " sethi %%uhi(%4), %1\n"
496 " sllx %1, 32, %1\n"
497 " .word 662b\n"
498 " or %1, %%lo(%4), %1\n"
499 " andn %0, %1, %0\n"
500 " .previous\n"
501 : "=r" (val), "=r" (tmp)
502 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
503 "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
504
505 return __pte(val);
506}
507
508static inline pte_t pte_mkold(pte_t pte)
509{
510 unsigned long mask;
511
512 __asm__ __volatile__(
513 "\n661: mov %1, %0\n"
514 " nop\n"
515 " .section .sun4v_2insn_patch, \"ax\"\n"
516 " .word 661b\n"
517 " sethi %%uhi(%2), %0\n"
518 " sllx %0, 32, %0\n"
519 " .previous\n"
520 : "=r" (mask)
521 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
522
523 mask |= _PAGE_R;
524
525 return __pte(pte_val(pte) & ~mask);
526}
527
528static inline pte_t pte_mkyoung(pte_t pte)
529{
530 unsigned long mask;
531
532 __asm__ __volatile__(
533 "\n661: mov %1, %0\n"
534 " nop\n"
535 " .section .sun4v_2insn_patch, \"ax\"\n"
536 " .word 661b\n"
537 " sethi %%uhi(%2), %0\n"
538 " sllx %0, 32, %0\n"
539 " .previous\n"
540 : "=r" (mask)
541 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
542
543 mask |= _PAGE_R;
544
545 return __pte(pte_val(pte) | mask);
546}
547
548static inline pte_t pte_mkspecial(pte_t pte)
549{
550 pte_val(pte) |= _PAGE_SPECIAL;
551 return pte;
552}
553
554static inline pte_t pte_mkmcd(pte_t pte)
555{
556 pte_val(pte) |= _PAGE_MCD_4V;
557 return pte;
558}
559
560static inline pte_t pte_mknotmcd(pte_t pte)
561{
562 pte_val(pte) &= ~_PAGE_MCD_4V;
563 return pte;
564}
565
566static inline unsigned long pte_young(pte_t pte)
567{
568 unsigned long mask;
569
570 __asm__ __volatile__(
571 "\n661: mov %1, %0\n"
572 " nop\n"
573 " .section .sun4v_2insn_patch, \"ax\"\n"
574 " .word 661b\n"
575 " sethi %%uhi(%2), %0\n"
576 " sllx %0, 32, %0\n"
577 " .previous\n"
578 : "=r" (mask)
579 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
580
581 return (pte_val(pte) & mask);
582}
583
584static inline unsigned long pte_dirty(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_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
598
599 return (pte_val(pte) & mask);
600}
601
602static inline unsigned long pte_write(pte_t pte)
603{
604 unsigned long mask;
605
606 __asm__ __volatile__(
607 "\n661: mov %1, %0\n"
608 " nop\n"
609 " .section .sun4v_2insn_patch, \"ax\"\n"
610 " .word 661b\n"
611 " sethi %%uhi(%2), %0\n"
612 " sllx %0, 32, %0\n"
613 " .previous\n"
614 : "=r" (mask)
615 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
616
617 return (pte_val(pte) & mask);
618}
619
620static inline unsigned long pte_exec(pte_t pte)
621{
622 unsigned long mask;
623
624 __asm__ __volatile__(
625 "\n661: sethi %%hi(%1), %0\n"
626 " .section .sun4v_1insn_patch, \"ax\"\n"
627 " .word 661b\n"
628 " mov %2, %0\n"
629 " .previous\n"
630 : "=r" (mask)
631 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
632
633 return (pte_val(pte) & mask);
634}
635
636static inline unsigned long pte_present(pte_t pte)
637{
638 unsigned long val = pte_val(pte);
639
640 __asm__ __volatile__(
641 "\n661: and %0, %2, %0\n"
642 " .section .sun4v_1insn_patch, \"ax\"\n"
643 " .word 661b\n"
644 " and %0, %3, %0\n"
645 " .previous\n"
646 : "=r" (val)
647 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
648
649 return val;
650}
651
652#define pte_accessible pte_accessible
653static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
654{
655 return pte_val(a) & _PAGE_VALID;
656}
657
658static inline unsigned long pte_special(pte_t pte)
659{
660 return pte_val(pte) & _PAGE_SPECIAL;
661}
662
663#define pmd_leaf pmd_large
664static inline unsigned long pmd_large(pmd_t pmd)
665{
666 pte_t pte = __pte(pmd_val(pmd));
667
668 return pte_val(pte) & _PAGE_PMD_HUGE;
669}
670
671static inline unsigned long pmd_pfn(pmd_t pmd)
672{
673 pte_t pte = __pte(pmd_val(pmd));
674
675 return pte_pfn(pte);
676}
677
678#define pmd_write pmd_write
679static inline unsigned long pmd_write(pmd_t pmd)
680{
681 pte_t pte = __pte(pmd_val(pmd));
682
683 return pte_write(pte);
684}
685
686#define pud_write(pud) pte_write(__pte(pud_val(pud)))
687
688#ifdef CONFIG_TRANSPARENT_HUGEPAGE
689static inline unsigned long pmd_dirty(pmd_t pmd)
690{
691 pte_t pte = __pte(pmd_val(pmd));
692
693 return pte_dirty(pte);
694}
695
696#define pmd_young pmd_young
697static inline unsigned long pmd_young(pmd_t pmd)
698{
699 pte_t pte = __pte(pmd_val(pmd));
700
701 return pte_young(pte);
702}
703
704static inline unsigned long pmd_trans_huge(pmd_t pmd)
705{
706 pte_t pte = __pte(pmd_val(pmd));
707
708 return pte_val(pte) & _PAGE_PMD_HUGE;
709}
710
711static inline pmd_t pmd_mkold(pmd_t pmd)
712{
713 pte_t pte = __pte(pmd_val(pmd));
714
715 pte = pte_mkold(pte);
716
717 return __pmd(pte_val(pte));
718}
719
720static inline pmd_t pmd_wrprotect(pmd_t pmd)
721{
722 pte_t pte = __pte(pmd_val(pmd));
723
724 pte = pte_wrprotect(pte);
725
726 return __pmd(pte_val(pte));
727}
728
729static inline pmd_t pmd_mkdirty(pmd_t pmd)
730{
731 pte_t pte = __pte(pmd_val(pmd));
732
733 pte = pte_mkdirty(pte);
734
735 return __pmd(pte_val(pte));
736}
737
738static inline pmd_t pmd_mkclean(pmd_t pmd)
739{
740 pte_t pte = __pte(pmd_val(pmd));
741
742 pte = pte_mkclean(pte);
743
744 return __pmd(pte_val(pte));
745}
746
747static inline pmd_t pmd_mkyoung(pmd_t pmd)
748{
749 pte_t pte = __pte(pmd_val(pmd));
750
751 pte = pte_mkyoung(pte);
752
753 return __pmd(pte_val(pte));
754}
755
756static inline pmd_t pmd_mkwrite(pmd_t pmd)
757{
758 pte_t pte = __pte(pmd_val(pmd));
759
760 pte = pte_mkwrite(pte);
761
762 return __pmd(pte_val(pte));
763}
764
765static inline pgprot_t pmd_pgprot(pmd_t entry)
766{
767 unsigned long val = pmd_val(entry);
768
769 return __pgprot(val);
770}
771#endif
772
773static inline int pmd_present(pmd_t pmd)
774{
775 return pmd_val(pmd) != 0UL;
776}
777
778#define pmd_none(pmd) (!pmd_val(pmd))
779
780/* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is
781 * very simple, it's just the physical address. PTE tables are of
782 * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
783 * the top bits outside of the range of any physical address size we
784 * support are clear as well. We also validate the physical itself.
785 */
786#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
787
788#define pud_none(pud) (!pud_val(pud))
789
790#define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK)
791
792#define p4d_none(p4d) (!p4d_val(p4d))
793
794#define p4d_bad(p4d) (p4d_val(p4d) & ~PAGE_MASK)
795
796#ifdef CONFIG_TRANSPARENT_HUGEPAGE
797void set_pmd_at(struct mm_struct *mm, unsigned long addr,
798 pmd_t *pmdp, pmd_t pmd);
799#else
800static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
801 pmd_t *pmdp, pmd_t pmd)
802{
803 *pmdp = pmd;
804}
805#endif
806
807static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
808{
809 unsigned long val = __pa((unsigned long) (ptep));
810
811 pmd_val(*pmdp) = val;
812}
813
814#define pud_set(pudp, pmdp) \
815 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
816static inline unsigned long pmd_page_vaddr(pmd_t pmd)
817{
818 pte_t pte = __pte(pmd_val(pmd));
819 unsigned long pfn;
820
821 pfn = pte_pfn(pte);
822
823 return ((unsigned long) __va(pfn << PAGE_SHIFT));
824}
825
826static inline pmd_t *pud_pgtable(pud_t pud)
827{
828 pte_t pte = __pte(pud_val(pud));
829 unsigned long pfn;
830
831 pfn = pte_pfn(pte);
832
833 return ((pmd_t *) __va(pfn << PAGE_SHIFT));
834}
835
836#define pmd_page(pmd) virt_to_page((void *)pmd_page_vaddr(pmd))
837#define pud_page(pud) virt_to_page((void *)pud_pgtable(pud))
838#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
839#define pud_present(pud) (pud_val(pud) != 0U)
840#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
841#define p4d_pgtable(p4d) \
842 ((pud_t *) __va(p4d_val(p4d)))
843#define p4d_present(p4d) (p4d_val(p4d) != 0U)
844#define p4d_clear(p4dp) (p4d_val(*(p4dp)) = 0UL)
845
846/* only used by the stubbed out hugetlb gup code, should never be called */
847#define p4d_page(p4d) NULL
848
849#define pud_leaf pud_large
850static inline unsigned long pud_large(pud_t pud)
851{
852 pte_t pte = __pte(pud_val(pud));
853
854 return pte_val(pte) & _PAGE_PMD_HUGE;
855}
856
857static inline unsigned long pud_pfn(pud_t pud)
858{
859 pte_t pte = __pte(pud_val(pud));
860
861 return pte_pfn(pte);
862}
863
864/* Same in both SUN4V and SUN4U. */
865#define pte_none(pte) (!pte_val(pte))
866
867#define p4d_set(p4dp, pudp) \
868 (p4d_val(*(p4dp)) = (__pa((unsigned long) (pudp))))
869
870/* We cannot include <linux/mm_types.h> at this point yet: */
871extern struct mm_struct init_mm;
872
873/* Actual page table PTE updates. */
874void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
875 pte_t *ptep, pte_t orig, int fullmm,
876 unsigned int hugepage_shift);
877
878static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
879 pte_t *ptep, pte_t orig, int fullmm,
880 unsigned int hugepage_shift)
881{
882 /* It is more efficient to let flush_tlb_kernel_range()
883 * handle init_mm tlb flushes.
884 *
885 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
886 * and SUN4V pte layout, so this inline test is fine.
887 */
888 if (likely(mm != &init_mm) && pte_accessible(mm, orig))
889 tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift);
890}
891
892#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
893static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
894 unsigned long addr,
895 pmd_t *pmdp)
896{
897 pmd_t pmd = *pmdp;
898 set_pmd_at(mm, addr, pmdp, __pmd(0UL));
899 return pmd;
900}
901
902static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
903 pte_t *ptep, pte_t pte, int fullmm)
904{
905 pte_t orig = *ptep;
906
907 *ptep = pte;
908 maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT);
909}
910
911#define set_pte_at(mm,addr,ptep,pte) \
912 __set_pte_at((mm), (addr), (ptep), (pte), 0)
913
914#define pte_clear(mm,addr,ptep) \
915 set_pte_at((mm), (addr), (ptep), __pte(0UL))
916
917#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
918#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
919 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
920
921#ifdef DCACHE_ALIASING_POSSIBLE
922#define __HAVE_ARCH_MOVE_PTE
923#define move_pte(pte, prot, old_addr, new_addr) \
924({ \
925 pte_t newpte = (pte); \
926 if (tlb_type != hypervisor && pte_present(pte)) { \
927 unsigned long this_pfn = pte_pfn(pte); \
928 \
929 if (pfn_valid(this_pfn) && \
930 (((old_addr) ^ (new_addr)) & (1 << 13))) \
931 flush_dcache_page_all(current->mm, \
932 pfn_to_page(this_pfn)); \
933 } \
934 newpte; \
935})
936#endif
937
938extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
939
940void paging_init(void);
941unsigned long find_ecache_flush_span(unsigned long size);
942
943struct seq_file;
944void mmu_info(struct seq_file *);
945
946struct vm_area_struct;
947void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
948#ifdef CONFIG_TRANSPARENT_HUGEPAGE
949void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
950 pmd_t *pmd);
951
952#define __HAVE_ARCH_PMDP_INVALIDATE
953extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
954 pmd_t *pmdp);
955
956#define __HAVE_ARCH_PGTABLE_DEPOSIT
957void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
958 pgtable_t pgtable);
959
960#define __HAVE_ARCH_PGTABLE_WITHDRAW
961pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
962#endif
963
964/* Encode and de-code a swap entry */
965#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL)
966#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
967#define __swp_entry(type, offset) \
968 ( (swp_entry_t) \
969 { \
970 (((long)(type) << PAGE_SHIFT) | \
971 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
972 } )
973#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
974#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
975
976int page_in_phys_avail(unsigned long paddr);
977
978/*
979 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
980 * its high 4 bits. These macros/functions put it there or get it from there.
981 */
982#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
983#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
984#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
985
986int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
987 unsigned long, pgprot_t);
988
989void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma,
990 unsigned long addr, pte_t pte);
991
992int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma,
993 unsigned long addr, pte_t oldpte);
994
995#define __HAVE_ARCH_DO_SWAP_PAGE
996static inline void arch_do_swap_page(struct mm_struct *mm,
997 struct vm_area_struct *vma,
998 unsigned long addr,
999 pte_t pte, pte_t oldpte)
1000{
1001 /* If this is a new page being mapped in, there can be no
1002 * ADI tags stored away for this page. Skip looking for
1003 * stored tags
1004 */
1005 if (pte_none(oldpte))
1006 return;
1007
1008 if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V))
1009 adi_restore_tags(mm, vma, addr, pte);
1010}
1011
1012#define __HAVE_ARCH_UNMAP_ONE
1013static inline int arch_unmap_one(struct mm_struct *mm,
1014 struct vm_area_struct *vma,
1015 unsigned long addr, pte_t oldpte)
1016{
1017 if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V))
1018 return adi_save_tags(mm, vma, addr, oldpte);
1019 return 0;
1020}
1021
1022static inline int io_remap_pfn_range(struct vm_area_struct *vma,
1023 unsigned long from, unsigned long pfn,
1024 unsigned long size, pgprot_t prot)
1025{
1026 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
1027 int space = GET_IOSPACE(pfn);
1028 unsigned long phys_base;
1029
1030 phys_base = offset | (((unsigned long) space) << 32UL);
1031
1032 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
1033}
1034#define io_remap_pfn_range io_remap_pfn_range
1035
1036static inline unsigned long __untagged_addr(unsigned long start)
1037{
1038 if (adi_capable()) {
1039 long addr = start;
1040
1041 /* If userspace has passed a versioned address, kernel
1042 * will not find it in the VMAs since it does not store
1043 * the version tags in the list of VMAs. Storing version
1044 * tags in list of VMAs is impractical since they can be
1045 * changed any time from userspace without dropping into
1046 * kernel. Any address search in VMAs will be done with
1047 * non-versioned addresses. Ensure the ADI version bits
1048 * are dropped here by sign extending the last bit before
1049 * ADI bits. IOMMU does not implement version tags.
1050 */
1051 return (addr << (long)adi_nbits()) >> (long)adi_nbits();
1052 }
1053
1054 return start;
1055}
1056#define untagged_addr(addr) \
1057 ((__typeof__(addr))(__untagged_addr((unsigned long)(addr))))
1058
1059static inline bool pte_access_permitted(pte_t pte, bool write)
1060{
1061 u64 prot;
1062
1063 if (tlb_type == hypervisor) {
1064 prot = _PAGE_PRESENT_4V | _PAGE_P_4V;
1065 if (write)
1066 prot |= _PAGE_WRITE_4V;
1067 } else {
1068 prot = _PAGE_PRESENT_4U | _PAGE_P_4U;
1069 if (write)
1070 prot |= _PAGE_WRITE_4U;
1071 }
1072
1073 return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
1074}
1075#define pte_access_permitted pte_access_permitted
1076
1077#include <asm/tlbflush.h>
1078
1079/* We provide our own get_unmapped_area to cope with VA holes and
1080 * SHM area cache aliasing for userland.
1081 */
1082#define HAVE_ARCH_UNMAPPED_AREA
1083#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
1084
1085/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
1086 * the largest alignment possible such that larget PTEs can be used.
1087 */
1088unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
1089 unsigned long, unsigned long,
1090 unsigned long);
1091#define HAVE_ARCH_FB_UNMAPPED_AREA
1092
1093void sun4v_register_fault_status(void);
1094void sun4v_ktsb_register(void);
1095void __init cheetah_ecache_flush_init(void);
1096void sun4v_patch_tlb_handlers(void);
1097
1098extern unsigned long cmdline_memory_size;
1099
1100asmlinkage void do_sparc64_fault(struct pt_regs *regs);
1101
1102#define pmd_pgtable(PMD) ((pte_t *)pmd_page_vaddr(PMD))
1103
1104#ifdef CONFIG_HUGETLB_PAGE
1105
1106#define pud_leaf_size pud_leaf_size
1107extern unsigned long pud_leaf_size(pud_t pud);
1108
1109#define pmd_leaf_size pmd_leaf_size
1110extern unsigned long pmd_leaf_size(pmd_t pmd);
1111
1112#define pte_leaf_size pte_leaf_size
1113extern unsigned long pte_leaf_size(pte_t pte);
1114
1115#endif /* CONFIG_HUGETLB_PAGE */
1116
1117#endif /* !(__ASSEMBLY__) */
1118
1119#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_large
684static inline unsigned long pmd_large(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
786static inline pgprot_t pmd_pgprot(pmd_t entry)
787{
788 unsigned long val = pmd_val(entry);
789
790 return __pgprot(val);
791}
792#endif
793
794static inline int pmd_present(pmd_t pmd)
795{
796 return pmd_val(pmd) != 0UL;
797}
798
799#define pmd_none(pmd) (!pmd_val(pmd))
800
801/* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is
802 * very simple, it's just the physical address. PTE tables are of
803 * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
804 * the top bits outside of the range of any physical address size we
805 * support are clear as well. We also validate the physical itself.
806 */
807#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
808
809#define pud_none(pud) (!pud_val(pud))
810
811#define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK)
812
813#define p4d_none(p4d) (!p4d_val(p4d))
814
815#define p4d_bad(p4d) (p4d_val(p4d) & ~PAGE_MASK)
816
817#ifdef CONFIG_TRANSPARENT_HUGEPAGE
818void set_pmd_at(struct mm_struct *mm, unsigned long addr,
819 pmd_t *pmdp, pmd_t pmd);
820#else
821static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
822 pmd_t *pmdp, pmd_t pmd)
823{
824 *pmdp = pmd;
825}
826#endif
827
828static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
829{
830 unsigned long val = __pa((unsigned long) (ptep));
831
832 pmd_val(*pmdp) = val;
833}
834
835#define pud_set(pudp, pmdp) \
836 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
837static inline unsigned long pmd_page_vaddr(pmd_t pmd)
838{
839 pte_t pte = __pte(pmd_val(pmd));
840 unsigned long pfn;
841
842 pfn = pte_pfn(pte);
843
844 return ((unsigned long) __va(pfn << PAGE_SHIFT));
845}
846
847static inline pmd_t *pud_pgtable(pud_t pud)
848{
849 pte_t pte = __pte(pud_val(pud));
850 unsigned long pfn;
851
852 pfn = pte_pfn(pte);
853
854 return ((pmd_t *) __va(pfn << PAGE_SHIFT));
855}
856
857#define pmd_page(pmd) virt_to_page((void *)pmd_page_vaddr(pmd))
858#define pud_page(pud) virt_to_page((void *)pud_pgtable(pud))
859#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
860#define pud_present(pud) (pud_val(pud) != 0U)
861#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
862#define p4d_pgtable(p4d) \
863 ((pud_t *) __va(p4d_val(p4d)))
864#define p4d_present(p4d) (p4d_val(p4d) != 0U)
865#define p4d_clear(p4dp) (p4d_val(*(p4dp)) = 0UL)
866
867/* only used by the stubbed out hugetlb gup code, should never be called */
868#define p4d_page(p4d) NULL
869
870#define pud_leaf pud_large
871static inline unsigned long pud_large(pud_t pud)
872{
873 pte_t pte = __pte(pud_val(pud));
874
875 return pte_val(pte) & _PAGE_PMD_HUGE;
876}
877
878static inline unsigned long pud_pfn(pud_t pud)
879{
880 pte_t pte = __pte(pud_val(pud));
881
882 return pte_pfn(pte);
883}
884
885/* Same in both SUN4V and SUN4U. */
886#define pte_none(pte) (!pte_val(pte))
887
888#define p4d_set(p4dp, pudp) \
889 (p4d_val(*(p4dp)) = (__pa((unsigned long) (pudp))))
890
891/* We cannot include <linux/mm_types.h> at this point yet: */
892extern struct mm_struct init_mm;
893
894/* Actual page table PTE updates. */
895void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
896 pte_t *ptep, pte_t orig, int fullmm,
897 unsigned int hugepage_shift);
898
899static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
900 pte_t *ptep, pte_t orig, int fullmm,
901 unsigned int hugepage_shift)
902{
903 /* It is more efficient to let flush_tlb_kernel_range()
904 * handle init_mm tlb flushes.
905 *
906 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
907 * and SUN4V pte layout, so this inline test is fine.
908 */
909 if (likely(mm != &init_mm) && pte_accessible(mm, orig))
910 tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift);
911}
912
913#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
914static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
915 unsigned long addr,
916 pmd_t *pmdp)
917{
918 pmd_t pmd = *pmdp;
919 set_pmd_at(mm, addr, pmdp, __pmd(0UL));
920 return pmd;
921}
922
923static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
924 pte_t *ptep, pte_t pte, int fullmm)
925{
926 pte_t orig = *ptep;
927
928 *ptep = pte;
929 maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT);
930}
931
932static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
933 pte_t *ptep, pte_t pte, unsigned int nr)
934{
935 arch_enter_lazy_mmu_mode();
936 for (;;) {
937 __set_pte_at(mm, addr, ptep, pte, 0);
938 if (--nr == 0)
939 break;
940 ptep++;
941 pte_val(pte) += PAGE_SIZE;
942 addr += PAGE_SIZE;
943 }
944 arch_leave_lazy_mmu_mode();
945}
946#define set_ptes set_ptes
947
948#define pte_clear(mm,addr,ptep) \
949 set_pte_at((mm), (addr), (ptep), __pte(0UL))
950
951#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
952#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
953 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
954
955#ifdef DCACHE_ALIASING_POSSIBLE
956#define __HAVE_ARCH_MOVE_PTE
957#define move_pte(pte, prot, old_addr, new_addr) \
958({ \
959 pte_t newpte = (pte); \
960 if (tlb_type != hypervisor && pte_present(pte)) { \
961 unsigned long this_pfn = pte_pfn(pte); \
962 \
963 if (pfn_valid(this_pfn) && \
964 (((old_addr) ^ (new_addr)) & (1 << 13))) \
965 flush_dcache_folio_all(current->mm, \
966 page_folio(pfn_to_page(this_pfn))); \
967 } \
968 newpte; \
969})
970#endif
971
972extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
973
974void paging_init(void);
975unsigned long find_ecache_flush_span(unsigned long size);
976
977struct seq_file;
978void mmu_info(struct seq_file *);
979
980struct vm_area_struct;
981void update_mmu_cache_range(struct vm_fault *, struct vm_area_struct *,
982 unsigned long addr, pte_t *ptep, unsigned int nr);
983#define update_mmu_cache(vma, addr, ptep) \
984 update_mmu_cache_range(NULL, vma, addr, ptep, 1)
985#ifdef CONFIG_TRANSPARENT_HUGEPAGE
986void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
987 pmd_t *pmd);
988
989#define __HAVE_ARCH_PMDP_INVALIDATE
990extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
991 pmd_t *pmdp);
992
993#define __HAVE_ARCH_PGTABLE_DEPOSIT
994void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
995 pgtable_t pgtable);
996
997#define __HAVE_ARCH_PGTABLE_WITHDRAW
998pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
999#endif
1000
1001/*
1002 * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
1003 * are !pte_none() && !pte_present().
1004 *
1005 * Format of swap PTEs:
1006 *
1007 * 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
1008 * 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
1009 * <--------------------------- offset ---------------------------
1010 *
1011 * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
1012 * 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
1013 * --------------------> E <-- type ---> <------- zeroes -------->
1014 */
1015#define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0x7fUL)
1016#define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL))
1017#define __swp_entry(type, offset) \
1018 ( (swp_entry_t) \
1019 { \
1020 ((((long)(type) & 0x7fUL) << PAGE_SHIFT) | \
1021 ((long)(offset) << (PAGE_SHIFT + 8UL))) \
1022 } )
1023#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
1024#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
1025
1026static inline int pte_swp_exclusive(pte_t pte)
1027{
1028 return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
1029}
1030
1031static inline pte_t pte_swp_mkexclusive(pte_t pte)
1032{
1033 return __pte(pte_val(pte) | _PAGE_SWP_EXCLUSIVE);
1034}
1035
1036static inline pte_t pte_swp_clear_exclusive(pte_t pte)
1037{
1038 return __pte(pte_val(pte) & ~_PAGE_SWP_EXCLUSIVE);
1039}
1040
1041int page_in_phys_avail(unsigned long paddr);
1042
1043/*
1044 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
1045 * its high 4 bits. These macros/functions put it there or get it from there.
1046 */
1047#define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4)))
1048#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
1049#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
1050
1051int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
1052 unsigned long, pgprot_t);
1053
1054void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1055 unsigned long addr, pte_t pte);
1056
1057int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma,
1058 unsigned long addr, pte_t oldpte);
1059
1060#define __HAVE_ARCH_DO_SWAP_PAGE
1061static inline void arch_do_swap_page(struct mm_struct *mm,
1062 struct vm_area_struct *vma,
1063 unsigned long addr,
1064 pte_t pte, pte_t oldpte)
1065{
1066 /* If this is a new page being mapped in, there can be no
1067 * ADI tags stored away for this page. Skip looking for
1068 * stored tags
1069 */
1070 if (pte_none(oldpte))
1071 return;
1072
1073 if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V))
1074 adi_restore_tags(mm, vma, addr, pte);
1075}
1076
1077#define __HAVE_ARCH_UNMAP_ONE
1078static inline int arch_unmap_one(struct mm_struct *mm,
1079 struct vm_area_struct *vma,
1080 unsigned long addr, pte_t oldpte)
1081{
1082 if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V))
1083 return adi_save_tags(mm, vma, addr, oldpte);
1084 return 0;
1085}
1086
1087static inline int io_remap_pfn_range(struct vm_area_struct *vma,
1088 unsigned long from, unsigned long pfn,
1089 unsigned long size, pgprot_t prot)
1090{
1091 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
1092 int space = GET_IOSPACE(pfn);
1093 unsigned long phys_base;
1094
1095 phys_base = offset | (((unsigned long) space) << 32UL);
1096
1097 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
1098}
1099#define io_remap_pfn_range io_remap_pfn_range
1100
1101static inline unsigned long __untagged_addr(unsigned long start)
1102{
1103 if (adi_capable()) {
1104 long addr = start;
1105
1106 /* If userspace has passed a versioned address, kernel
1107 * will not find it in the VMAs since it does not store
1108 * the version tags in the list of VMAs. Storing version
1109 * tags in list of VMAs is impractical since they can be
1110 * changed any time from userspace without dropping into
1111 * kernel. Any address search in VMAs will be done with
1112 * non-versioned addresses. Ensure the ADI version bits
1113 * are dropped here by sign extending the last bit before
1114 * ADI bits. IOMMU does not implement version tags.
1115 */
1116 return (addr << (long)adi_nbits()) >> (long)adi_nbits();
1117 }
1118
1119 return start;
1120}
1121#define untagged_addr(addr) \
1122 ((__typeof__(addr))(__untagged_addr((unsigned long)(addr))))
1123
1124static inline bool pte_access_permitted(pte_t pte, bool write)
1125{
1126 u64 prot;
1127
1128 if (tlb_type == hypervisor) {
1129 prot = _PAGE_PRESENT_4V | _PAGE_P_4V;
1130 if (write)
1131 prot |= _PAGE_WRITE_4V;
1132 } else {
1133 prot = _PAGE_PRESENT_4U | _PAGE_P_4U;
1134 if (write)
1135 prot |= _PAGE_WRITE_4U;
1136 }
1137
1138 return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
1139}
1140#define pte_access_permitted pte_access_permitted
1141
1142/* We provide our own get_unmapped_area to cope with VA holes and
1143 * SHM area cache aliasing for userland.
1144 */
1145#define HAVE_ARCH_UNMAPPED_AREA
1146#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
1147
1148/* We provide a special get_unmapped_area for framebuffer mmaps to try and use
1149 * the largest alignment possible such that larget PTEs can be used.
1150 */
1151unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
1152 unsigned long, unsigned long,
1153 unsigned long);
1154#define HAVE_ARCH_FB_UNMAPPED_AREA
1155
1156void sun4v_register_fault_status(void);
1157void sun4v_ktsb_register(void);
1158void __init cheetah_ecache_flush_init(void);
1159void sun4v_patch_tlb_handlers(void);
1160
1161extern unsigned long cmdline_memory_size;
1162
1163asmlinkage void do_sparc64_fault(struct pt_regs *regs);
1164
1165#define pmd_pgtable(PMD) ((pte_t *)pmd_page_vaddr(PMD))
1166
1167#ifdef CONFIG_HUGETLB_PAGE
1168
1169#define pud_leaf_size pud_leaf_size
1170extern unsigned long pud_leaf_size(pud_t pud);
1171
1172#define pmd_leaf_size pmd_leaf_size
1173extern unsigned long pmd_leaf_size(pmd_t pmd);
1174
1175#define pte_leaf_size pte_leaf_size
1176extern unsigned long pte_leaf_size(pte_t pte);
1177
1178#endif /* CONFIG_HUGETLB_PAGE */
1179
1180#endif /* !(__ASSEMBLY__) */
1181
1182#endif /* !(_SPARC64_PGTABLE_H) */