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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 | ||
2533e824 AK |
23 | #include <asm-generic/pgtable-nopud.h> |
24 | ||
f5e706ad SR |
25 | /* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB). |
26 | * The page copy blockops can use 0x6000000 to 0x8000000. | |
27 | * The TSB is mapped in the 0x8000000 to 0xa000000 range. | |
28 | * The PROM resides in an area spanning 0xf0000000 to 0x100000000. | |
29 | * The vmalloc area spans 0x100000000 to 0x200000000. | |
30 | * Since modules need to be in the lowest 32-bits of the address space, | |
31 | * we place them right before the OBP area from 0x10000000 to 0xf0000000. | |
32 | * There is a single static kernel PMD which maps from 0x0 to address | |
33 | * 0x400000000. | |
34 | */ | |
35 | #define TLBTEMP_BASE _AC(0x0000000006000000,UL) | |
36 | #define TSBMAP_BASE _AC(0x0000000008000000,UL) | |
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) | |
1b6b9d62 DM |
43 | #define VMALLOC_END _AC(0x0000010000000000,UL) |
44 | #define VMEMMAP_BASE _AC(0x0000010000000000,UL) | |
f5e706ad SR |
45 | |
46 | #define vmemmap ((struct page *)VMEMMAP_BASE) | |
47 | ||
48 | /* XXX All of this needs to be rethought so we can take advantage | |
49 | * XXX cheetah's full 64-bit virtual address space, ie. no more hole | |
50 | * XXX in the middle like on spitfire. -DaveM | |
51 | */ | |
52 | /* | |
53 | * Given a virtual address, the lowest PAGE_SHIFT bits determine offset | |
54 | * into the page; the next higher PAGE_SHIFT-3 bits determine the pte# | |
55 | * in the proper pagetable (the -3 is from the 8 byte ptes, and each page | |
56 | * table is a single page long). The next higher PMD_BITS determine pmd# | |
57 | * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2) | |
58 | * since the pmd entries are 4 bytes, and each pmd page is a single page | |
59 | * long). Finally, the higher few bits determine pgde#. | |
60 | */ | |
61 | ||
62 | /* PMD_SHIFT determines the size of the area a second-level page | |
63 | * table can map | |
64 | */ | |
65 | #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) | |
66 | #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) | |
67 | #define PMD_MASK (~(PMD_SIZE-1)) | |
68 | #define PMD_BITS (PAGE_SHIFT - 2) | |
69 | ||
70 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ | |
71 | #define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS) | |
72 | #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) | |
73 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) | |
74 | #define PGDIR_BITS (PAGE_SHIFT - 2) | |
75 | ||
76 | #ifndef __ASSEMBLY__ | |
77 | ||
78 | #include <linux/sched.h> | |
79 | ||
80 | /* Entries per page directory level. */ | |
81 | #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3)) | |
82 | #define PTRS_PER_PMD (1UL << PMD_BITS) | |
83 | #define PTRS_PER_PGD (1UL << PGDIR_BITS) | |
84 | ||
85 | /* Kernel has a separate 44bit address space. */ | |
86 | #define FIRST_USER_ADDRESS 0 | |
87 | ||
88 | #define pte_ERROR(e) __builtin_trap() | |
89 | #define pmd_ERROR(e) __builtin_trap() | |
90 | #define pgd_ERROR(e) __builtin_trap() | |
91 | ||
92 | #endif /* !(__ASSEMBLY__) */ | |
93 | ||
94 | /* PTE bits which are the same in SUN4U and SUN4V format. */ | |
95 | #define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */ | |
96 | #define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/ | |
683d2fa6 DM |
97 | #define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */ |
98 | ||
99 | /* Advertise support for _PAGE_SPECIAL */ | |
100 | #define __HAVE_ARCH_PTE_SPECIAL | |
f5e706ad SR |
101 | |
102 | /* SUN4U pte bits... */ | |
103 | #define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */ | |
104 | #define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */ | |
105 | #define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */ | |
106 | #define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */ | |
107 | #define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */ | |
108 | #define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */ | |
109 | #define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */ | |
683d2fa6 | 110 | #define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */ |
f5e706ad SR |
111 | #define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */ |
112 | #define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */ | |
113 | #define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */ | |
114 | #define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */ | |
115 | #define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */ | |
116 | #define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */ | |
117 | #define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */ | |
118 | #define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */ | |
119 | #define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */ | |
120 | #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */ | |
121 | #define _PAGE_FILE_4U _AC(0x0000000000000800,UL) /* Pagecache page */ | |
122 | #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */ | |
123 | #define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */ | |
124 | #define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */ | |
125 | #define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */ | |
126 | #define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */ | |
127 | #define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */ | |
128 | #define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */ | |
129 | #define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */ | |
130 | #define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */ | |
131 | #define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */ | |
132 | ||
133 | /* SUN4V pte bits... */ | |
134 | #define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */ | |
135 | #define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */ | |
136 | #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */ | |
137 | #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */ | |
138 | #define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */ | |
139 | #define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */ | |
683d2fa6 | 140 | #define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */ |
f5e706ad SR |
141 | #define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */ |
142 | #define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */ | |
143 | #define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */ | |
144 | #define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */ | |
145 | #define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */ | |
146 | #define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */ | |
147 | #define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */ | |
148 | #define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */ | |
149 | #define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */ | |
150 | #define _PAGE_FILE_4V _AC(0x0000000000000020,UL) /* Pagecache page */ | |
151 | #define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */ | |
152 | #define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */ | |
153 | #define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */ | |
154 | #define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */ | |
155 | #define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */ | |
156 | #define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */ | |
157 | #define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */ | |
158 | #define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */ | |
159 | #define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */ | |
160 | #define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */ | |
161 | #define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */ | |
162 | ||
163 | #if PAGE_SHIFT == 13 | |
164 | #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U | |
165 | #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V | |
166 | #elif PAGE_SHIFT == 16 | |
167 | #define _PAGE_SZBITS_4U _PAGE_SZ64K_4U | |
168 | #define _PAGE_SZBITS_4V _PAGE_SZ64K_4V | |
f5e706ad SR |
169 | #else |
170 | #error Wrong PAGE_SHIFT specified | |
171 | #endif | |
172 | ||
173 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) | |
174 | #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U | |
175 | #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V | |
176 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | |
177 | #define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U | |
178 | #define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V | |
179 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
180 | #define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U | |
181 | #define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V | |
182 | #endif | |
183 | ||
184 | /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */ | |
185 | #define __P000 __pgprot(0) | |
186 | #define __P001 __pgprot(0) | |
187 | #define __P010 __pgprot(0) | |
188 | #define __P011 __pgprot(0) | |
189 | #define __P100 __pgprot(0) | |
190 | #define __P101 __pgprot(0) | |
191 | #define __P110 __pgprot(0) | |
192 | #define __P111 __pgprot(0) | |
193 | ||
194 | #define __S000 __pgprot(0) | |
195 | #define __S001 __pgprot(0) | |
196 | #define __S010 __pgprot(0) | |
197 | #define __S011 __pgprot(0) | |
198 | #define __S100 __pgprot(0) | |
199 | #define __S101 __pgprot(0) | |
200 | #define __S110 __pgprot(0) | |
201 | #define __S111 __pgprot(0) | |
202 | ||
203 | #ifndef __ASSEMBLY__ | |
204 | ||
205 | extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long); | |
206 | ||
207 | extern unsigned long pte_sz_bits(unsigned long size); | |
208 | ||
209 | extern pgprot_t PAGE_KERNEL; | |
210 | extern pgprot_t PAGE_KERNEL_LOCKED; | |
211 | extern pgprot_t PAGE_COPY; | |
212 | extern pgprot_t PAGE_SHARED; | |
213 | ||
214 | /* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */ | |
215 | extern unsigned long _PAGE_IE; | |
216 | extern unsigned long _PAGE_E; | |
217 | extern unsigned long _PAGE_CACHE; | |
218 | ||
219 | extern unsigned long pg_iobits; | |
220 | extern unsigned long _PAGE_ALL_SZ_BITS; | |
221 | extern unsigned long _PAGE_SZBITS; | |
222 | ||
223 | extern struct page *mem_map_zero; | |
224 | #define ZERO_PAGE(vaddr) (mem_map_zero) | |
225 | ||
226 | /* PFNs are real physical page numbers. However, mem_map only begins to record | |
227 | * per-page information starting at pfn_base. This is to handle systems where | |
228 | * the first physical page in the machine is at some huge physical address, | |
229 | * such as 4GB. This is common on a partitioned E10000, for example. | |
230 | */ | |
231 | static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot) | |
232 | { | |
233 | unsigned long paddr = pfn << PAGE_SHIFT; | |
234 | unsigned long sz_bits; | |
235 | ||
236 | sz_bits = 0UL; | |
237 | if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) { | |
238 | __asm__ __volatile__( | |
239 | "\n661: sethi %%uhi(%1), %0\n" | |
240 | " sllx %0, 32, %0\n" | |
241 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
242 | " .word 661b\n" | |
243 | " mov %2, %0\n" | |
244 | " nop\n" | |
245 | " .previous\n" | |
246 | : "=r" (sz_bits) | |
247 | : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V)); | |
248 | } | |
249 | return __pte(paddr | sz_bits | pgprot_val(prot)); | |
250 | } | |
251 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
252 | ||
253 | /* This one can be done with two shifts. */ | |
254 | static inline unsigned long pte_pfn(pte_t pte) | |
255 | { | |
256 | unsigned long ret; | |
257 | ||
258 | __asm__ __volatile__( | |
259 | "\n661: sllx %1, %2, %0\n" | |
260 | " srlx %0, %3, %0\n" | |
261 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
262 | " .word 661b\n" | |
263 | " sllx %1, %4, %0\n" | |
264 | " srlx %0, %5, %0\n" | |
265 | " .previous\n" | |
266 | : "=r" (ret) | |
267 | : "r" (pte_val(pte)), | |
268 | "i" (21), "i" (21 + PAGE_SHIFT), | |
269 | "i" (8), "i" (8 + PAGE_SHIFT)); | |
270 | ||
271 | return ret; | |
272 | } | |
273 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
274 | ||
275 | static inline pte_t pte_modify(pte_t pte, pgprot_t prot) | |
276 | { | |
277 | unsigned long mask, tmp; | |
278 | ||
279 | /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347) | |
280 | * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8) | |
281 | * | |
282 | * Even if we use negation tricks the result is still a 6 | |
283 | * instruction sequence, so don't try to play fancy and just | |
284 | * do the most straightforward implementation. | |
285 | * | |
286 | * Note: We encode this into 3 sun4v 2-insn patch sequences. | |
287 | */ | |
288 | ||
289 | __asm__ __volatile__( | |
290 | "\n661: sethi %%uhi(%2), %1\n" | |
291 | " sethi %%hi(%2), %0\n" | |
292 | "\n662: or %1, %%ulo(%2), %1\n" | |
293 | " or %0, %%lo(%2), %0\n" | |
294 | "\n663: sllx %1, 32, %1\n" | |
295 | " or %0, %1, %0\n" | |
296 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
297 | " .word 661b\n" | |
298 | " sethi %%uhi(%3), %1\n" | |
299 | " sethi %%hi(%3), %0\n" | |
300 | " .word 662b\n" | |
301 | " or %1, %%ulo(%3), %1\n" | |
302 | " or %0, %%lo(%3), %0\n" | |
303 | " .word 663b\n" | |
304 | " sllx %1, 32, %1\n" | |
305 | " or %0, %1, %0\n" | |
306 | " .previous\n" | |
307 | : "=r" (mask), "=r" (tmp) | |
308 | : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U | | |
309 | _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U | | |
683d2fa6 | 310 | _PAGE_SZBITS_4U | _PAGE_SPECIAL), |
f5e706ad SR |
311 | "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | |
312 | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V | | |
683d2fa6 | 313 | _PAGE_SZBITS_4V | _PAGE_SPECIAL)); |
f5e706ad SR |
314 | |
315 | return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask)); | |
316 | } | |
317 | ||
318 | static inline pte_t pgoff_to_pte(unsigned long off) | |
319 | { | |
320 | off <<= PAGE_SHIFT; | |
321 | ||
322 | __asm__ __volatile__( | |
323 | "\n661: or %0, %2, %0\n" | |
324 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
325 | " .word 661b\n" | |
326 | " or %0, %3, %0\n" | |
327 | " .previous\n" | |
328 | : "=r" (off) | |
329 | : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V)); | |
330 | ||
331 | return __pte(off); | |
332 | } | |
333 | ||
334 | static inline pgprot_t pgprot_noncached(pgprot_t prot) | |
335 | { | |
336 | unsigned long val = pgprot_val(prot); | |
337 | ||
338 | __asm__ __volatile__( | |
339 | "\n661: andn %0, %2, %0\n" | |
340 | " or %0, %3, %0\n" | |
341 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
342 | " .word 661b\n" | |
343 | " andn %0, %4, %0\n" | |
344 | " or %0, %5, %0\n" | |
345 | " .previous\n" | |
346 | : "=r" (val) | |
347 | : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U), | |
348 | "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V)); | |
349 | ||
350 | return __pgprot(val); | |
351 | } | |
352 | /* Various pieces of code check for platform support by ifdef testing | |
353 | * on "pgprot_noncached". That's broken and should be fixed, but for | |
354 | * now... | |
355 | */ | |
356 | #define pgprot_noncached pgprot_noncached | |
357 | ||
358 | #ifdef CONFIG_HUGETLB_PAGE | |
359 | static inline pte_t pte_mkhuge(pte_t pte) | |
360 | { | |
361 | unsigned long mask; | |
362 | ||
363 | __asm__ __volatile__( | |
364 | "\n661: sethi %%uhi(%1), %0\n" | |
365 | " sllx %0, 32, %0\n" | |
366 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
367 | " .word 661b\n" | |
368 | " mov %2, %0\n" | |
369 | " nop\n" | |
370 | " .previous\n" | |
371 | : "=r" (mask) | |
372 | : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V)); | |
373 | ||
374 | return __pte(pte_val(pte) | mask); | |
375 | } | |
376 | #endif | |
377 | ||
378 | static inline pte_t pte_mkdirty(pte_t pte) | |
379 | { | |
380 | unsigned long val = pte_val(pte), tmp; | |
381 | ||
382 | __asm__ __volatile__( | |
383 | "\n661: or %0, %3, %0\n" | |
384 | " nop\n" | |
385 | "\n662: nop\n" | |
386 | " nop\n" | |
387 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
388 | " .word 661b\n" | |
389 | " sethi %%uhi(%4), %1\n" | |
390 | " sllx %1, 32, %1\n" | |
391 | " .word 662b\n" | |
392 | " or %1, %%lo(%4), %1\n" | |
393 | " or %0, %1, %0\n" | |
394 | " .previous\n" | |
395 | : "=r" (val), "=r" (tmp) | |
396 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), | |
397 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
398 | ||
399 | return __pte(val); | |
400 | } | |
401 | ||
402 | static inline pte_t pte_mkclean(pte_t pte) | |
403 | { | |
404 | unsigned long val = pte_val(pte), tmp; | |
405 | ||
406 | __asm__ __volatile__( | |
407 | "\n661: andn %0, %3, %0\n" | |
408 | " nop\n" | |
409 | "\n662: nop\n" | |
410 | " nop\n" | |
411 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
412 | " .word 661b\n" | |
413 | " sethi %%uhi(%4), %1\n" | |
414 | " sllx %1, 32, %1\n" | |
415 | " .word 662b\n" | |
416 | " or %1, %%lo(%4), %1\n" | |
417 | " andn %0, %1, %0\n" | |
418 | " .previous\n" | |
419 | : "=r" (val), "=r" (tmp) | |
420 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), | |
421 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
422 | ||
423 | return __pte(val); | |
424 | } | |
425 | ||
426 | static inline pte_t pte_mkwrite(pte_t pte) | |
427 | { | |
428 | unsigned long val = pte_val(pte), mask; | |
429 | ||
430 | __asm__ __volatile__( | |
431 | "\n661: mov %1, %0\n" | |
432 | " nop\n" | |
433 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
434 | " .word 661b\n" | |
435 | " sethi %%uhi(%2), %0\n" | |
436 | " sllx %0, 32, %0\n" | |
437 | " .previous\n" | |
438 | : "=r" (mask) | |
439 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); | |
440 | ||
441 | return __pte(val | mask); | |
442 | } | |
443 | ||
444 | static inline pte_t pte_wrprotect(pte_t pte) | |
445 | { | |
446 | unsigned long val = pte_val(pte), tmp; | |
447 | ||
448 | __asm__ __volatile__( | |
449 | "\n661: andn %0, %3, %0\n" | |
450 | " nop\n" | |
451 | "\n662: nop\n" | |
452 | " nop\n" | |
453 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
454 | " .word 661b\n" | |
455 | " sethi %%uhi(%4), %1\n" | |
456 | " sllx %1, 32, %1\n" | |
457 | " .word 662b\n" | |
458 | " or %1, %%lo(%4), %1\n" | |
459 | " andn %0, %1, %0\n" | |
460 | " .previous\n" | |
461 | : "=r" (val), "=r" (tmp) | |
462 | : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U), | |
463 | "i" (_PAGE_WRITE_4V | _PAGE_W_4V)); | |
464 | ||
465 | return __pte(val); | |
466 | } | |
467 | ||
468 | static inline pte_t pte_mkold(pte_t pte) | |
469 | { | |
470 | unsigned long mask; | |
471 | ||
472 | __asm__ __volatile__( | |
473 | "\n661: mov %1, %0\n" | |
474 | " nop\n" | |
475 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
476 | " .word 661b\n" | |
477 | " sethi %%uhi(%2), %0\n" | |
478 | " sllx %0, 32, %0\n" | |
479 | " .previous\n" | |
480 | : "=r" (mask) | |
481 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
482 | ||
483 | mask |= _PAGE_R; | |
484 | ||
485 | return __pte(pte_val(pte) & ~mask); | |
486 | } | |
487 | ||
488 | static inline pte_t pte_mkyoung(pte_t pte) | |
489 | { | |
490 | unsigned long mask; | |
491 | ||
492 | __asm__ __volatile__( | |
493 | "\n661: mov %1, %0\n" | |
494 | " nop\n" | |
495 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
496 | " .word 661b\n" | |
497 | " sethi %%uhi(%2), %0\n" | |
498 | " sllx %0, 32, %0\n" | |
499 | " .previous\n" | |
500 | : "=r" (mask) | |
501 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
502 | ||
503 | mask |= _PAGE_R; | |
504 | ||
505 | return __pte(pte_val(pte) | mask); | |
506 | } | |
507 | ||
508 | static inline pte_t pte_mkspecial(pte_t pte) | |
509 | { | |
683d2fa6 | 510 | pte_val(pte) |= _PAGE_SPECIAL; |
f5e706ad SR |
511 | return pte; |
512 | } | |
513 | ||
514 | static inline unsigned long pte_young(pte_t pte) | |
515 | { | |
516 | unsigned long mask; | |
517 | ||
518 | __asm__ __volatile__( | |
519 | "\n661: mov %1, %0\n" | |
520 | " nop\n" | |
521 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
522 | " .word 661b\n" | |
523 | " sethi %%uhi(%2), %0\n" | |
524 | " sllx %0, 32, %0\n" | |
525 | " .previous\n" | |
526 | : "=r" (mask) | |
527 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
528 | ||
529 | return (pte_val(pte) & mask); | |
530 | } | |
531 | ||
532 | static inline unsigned long pte_dirty(pte_t pte) | |
533 | { | |
534 | unsigned long mask; | |
535 | ||
536 | __asm__ __volatile__( | |
537 | "\n661: mov %1, %0\n" | |
538 | " nop\n" | |
539 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
540 | " .word 661b\n" | |
541 | " sethi %%uhi(%2), %0\n" | |
542 | " sllx %0, 32, %0\n" | |
543 | " .previous\n" | |
544 | : "=r" (mask) | |
545 | : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V)); | |
546 | ||
547 | return (pte_val(pte) & mask); | |
548 | } | |
549 | ||
550 | static inline unsigned long pte_write(pte_t pte) | |
551 | { | |
552 | unsigned long mask; | |
553 | ||
554 | __asm__ __volatile__( | |
555 | "\n661: mov %1, %0\n" | |
556 | " nop\n" | |
557 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
558 | " .word 661b\n" | |
559 | " sethi %%uhi(%2), %0\n" | |
560 | " sllx %0, 32, %0\n" | |
561 | " .previous\n" | |
562 | : "=r" (mask) | |
563 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); | |
564 | ||
565 | return (pte_val(pte) & mask); | |
566 | } | |
567 | ||
568 | static inline unsigned long pte_exec(pte_t pte) | |
569 | { | |
570 | unsigned long mask; | |
571 | ||
572 | __asm__ __volatile__( | |
573 | "\n661: sethi %%hi(%1), %0\n" | |
574 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
575 | " .word 661b\n" | |
576 | " mov %2, %0\n" | |
577 | " .previous\n" | |
578 | : "=r" (mask) | |
579 | : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V)); | |
580 | ||
581 | return (pte_val(pte) & mask); | |
582 | } | |
583 | ||
584 | static inline unsigned long pte_file(pte_t pte) | |
585 | { | |
586 | unsigned long val = pte_val(pte); | |
587 | ||
588 | __asm__ __volatile__( | |
589 | "\n661: and %0, %2, %0\n" | |
590 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
591 | " .word 661b\n" | |
592 | " and %0, %3, %0\n" | |
593 | " .previous\n" | |
594 | : "=r" (val) | |
595 | : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V)); | |
596 | ||
597 | return val; | |
598 | } | |
599 | ||
600 | static inline unsigned long pte_present(pte_t pte) | |
601 | { | |
602 | unsigned long val = pte_val(pte); | |
603 | ||
604 | __asm__ __volatile__( | |
605 | "\n661: and %0, %2, %0\n" | |
606 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
607 | " .word 661b\n" | |
608 | " and %0, %3, %0\n" | |
609 | " .previous\n" | |
610 | : "=r" (val) | |
611 | : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V)); | |
612 | ||
613 | return val; | |
614 | } | |
615 | ||
683d2fa6 | 616 | static inline unsigned long pte_special(pte_t pte) |
f5e706ad | 617 | { |
683d2fa6 | 618 | return pte_val(pte) & _PAGE_SPECIAL; |
f5e706ad SR |
619 | } |
620 | ||
621 | #define pmd_set(pmdp, ptep) \ | |
622 | (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL)) | |
623 | #define pud_set(pudp, pmdp) \ | |
624 | (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL)) | |
625 | #define __pmd_page(pmd) \ | |
626 | ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL))) | |
627 | #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) | |
628 | #define pud_page_vaddr(pud) \ | |
629 | ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL))) | |
630 | #define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud)) | |
631 | #define pmd_none(pmd) (!pmd_val(pmd)) | |
632 | #define pmd_bad(pmd) (0) | |
633 | #define pmd_present(pmd) (pmd_val(pmd) != 0U) | |
634 | #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U) | |
635 | #define pud_none(pud) (!pud_val(pud)) | |
636 | #define pud_bad(pud) (0) | |
637 | #define pud_present(pud) (pud_val(pud) != 0U) | |
638 | #define pud_clear(pudp) (pud_val(*(pudp)) = 0U) | |
639 | ||
640 | /* Same in both SUN4V and SUN4U. */ | |
641 | #define pte_none(pte) (!pte_val(pte)) | |
642 | ||
643 | /* to find an entry in a page-table-directory. */ | |
644 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
645 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | |
646 | ||
647 | /* to find an entry in a kernel page-table-directory */ | |
648 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
649 | ||
650 | /* Find an entry in the second-level page table.. */ | |
651 | #define pmd_offset(pudp, address) \ | |
652 | ((pmd_t *) pud_page_vaddr(*(pudp)) + \ | |
653 | (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))) | |
654 | ||
655 | /* Find an entry in the third-level page table.. */ | |
656 | #define pte_index(dir, address) \ | |
657 | ((pte_t *) __pmd_page(*(dir)) + \ | |
658 | ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) | |
659 | #define pte_offset_kernel pte_index | |
660 | #define pte_offset_map pte_index | |
f5e706ad | 661 | #define pte_unmap(pte) do { } while (0) |
f5e706ad SR |
662 | |
663 | /* Actual page table PTE updates. */ | |
90f08e39 PZ |
664 | extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, |
665 | pte_t *ptep, pte_t orig, int fullmm); | |
f5e706ad | 666 | |
90f08e39 PZ |
667 | static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, |
668 | pte_t *ptep, pte_t pte, int fullmm) | |
f5e706ad SR |
669 | { |
670 | pte_t orig = *ptep; | |
671 | ||
672 | *ptep = pte; | |
673 | ||
674 | /* It is more efficient to let flush_tlb_kernel_range() | |
675 | * handle init_mm tlb flushes. | |
676 | * | |
677 | * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U | |
678 | * and SUN4V pte layout, so this inline test is fine. | |
679 | */ | |
680 | if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID)) | |
90f08e39 | 681 | tlb_batch_add(mm, addr, ptep, orig, fullmm); |
f5e706ad SR |
682 | } |
683 | ||
90f08e39 PZ |
684 | #define set_pte_at(mm,addr,ptep,pte) \ |
685 | __set_pte_at((mm), (addr), (ptep), (pte), 0) | |
686 | ||
f5e706ad SR |
687 | #define pte_clear(mm,addr,ptep) \ |
688 | set_pte_at((mm), (addr), (ptep), __pte(0UL)) | |
689 | ||
90f08e39 PZ |
690 | #define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL |
691 | #define pte_clear_not_present_full(mm,addr,ptep,fullmm) \ | |
692 | __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm)) | |
693 | ||
f5e706ad SR |
694 | #ifdef DCACHE_ALIASING_POSSIBLE |
695 | #define __HAVE_ARCH_MOVE_PTE | |
696 | #define move_pte(pte, prot, old_addr, new_addr) \ | |
697 | ({ \ | |
698 | pte_t newpte = (pte); \ | |
699 | if (tlb_type != hypervisor && pte_present(pte)) { \ | |
700 | unsigned long this_pfn = pte_pfn(pte); \ | |
701 | \ | |
702 | if (pfn_valid(this_pfn) && \ | |
703 | (((old_addr) ^ (new_addr)) & (1 << 13))) \ | |
704 | flush_dcache_page_all(current->mm, \ | |
705 | pfn_to_page(this_pfn)); \ | |
706 | } \ | |
707 | newpte; \ | |
708 | }) | |
709 | #endif | |
710 | ||
711 | extern pgd_t swapper_pg_dir[2048]; | |
712 | extern pmd_t swapper_low_pmd_dir[2048]; | |
713 | ||
714 | extern void paging_init(void); | |
715 | extern unsigned long find_ecache_flush_span(unsigned long size); | |
716 | ||
cb1b8209 SR |
717 | struct seq_file; |
718 | extern void mmu_info(struct seq_file *); | |
719 | ||
f5e706ad | 720 | struct vm_area_struct; |
4b3073e1 | 721 | extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); |
f5e706ad SR |
722 | |
723 | /* Encode and de-code a swap entry */ | |
724 | #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) | |
725 | #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL)) | |
726 | #define __swp_entry(type, offset) \ | |
727 | ( (swp_entry_t) \ | |
728 | { \ | |
729 | (((long)(type) << PAGE_SHIFT) | \ | |
730 | ((long)(offset) << (PAGE_SHIFT + 8UL))) \ | |
731 | } ) | |
732 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
733 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
734 | ||
735 | /* File offset in PTE support. */ | |
736 | extern unsigned long pte_file(pte_t); | |
737 | #define pte_to_pgoff(pte) (pte_val(pte) >> PAGE_SHIFT) | |
738 | extern pte_t pgoff_to_pte(unsigned long); | |
739 | #define PTE_FILE_MAX_BITS (64UL - PAGE_SHIFT - 1UL) | |
740 | ||
d8ed1d43 | 741 | extern unsigned long sparc64_valid_addr_bitmap[]; |
f5e706ad SR |
742 | |
743 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | |
d8ed1d43 DM |
744 | static inline bool kern_addr_valid(unsigned long addr) |
745 | { | |
746 | unsigned long paddr = __pa(addr); | |
747 | ||
748 | if ((paddr >> 41UL) != 0UL) | |
749 | return false; | |
750 | return test_bit(paddr >> 22, sparc64_valid_addr_bitmap); | |
751 | } | |
f5e706ad SR |
752 | |
753 | extern int page_in_phys_avail(unsigned long paddr); | |
754 | ||
f5e706ad SR |
755 | /* |
756 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | |
757 | * its high 4 bits. These macros/functions put it there or get it from there. | |
758 | */ | |
759 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | |
760 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | |
761 | #define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL) | |
762 | ||
3e37fd31 DM |
763 | extern int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long, |
764 | unsigned long, pgprot_t); | |
765 | ||
766 | static inline int io_remap_pfn_range(struct vm_area_struct *vma, | |
767 | unsigned long from, unsigned long pfn, | |
768 | unsigned long size, pgprot_t prot) | |
769 | { | |
770 | unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; | |
771 | int space = GET_IOSPACE(pfn); | |
772 | unsigned long phys_base; | |
773 | ||
774 | phys_base = offset | (((unsigned long) space) << 32UL); | |
775 | ||
776 | return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot); | |
777 | } | |
778 | ||
f5e706ad SR |
779 | #include <asm-generic/pgtable.h> |
780 | ||
781 | /* We provide our own get_unmapped_area to cope with VA holes and | |
782 | * SHM area cache aliasing for userland. | |
783 | */ | |
784 | #define HAVE_ARCH_UNMAPPED_AREA | |
785 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN | |
786 | ||
787 | /* We provide a special get_unmapped_area for framebuffer mmaps to try and use | |
788 | * the largest alignment possible such that larget PTEs can be used. | |
789 | */ | |
790 | extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long, | |
791 | unsigned long, unsigned long, | |
792 | unsigned long); | |
793 | #define HAVE_ARCH_FB_UNMAPPED_AREA | |
794 | ||
795 | extern void pgtable_cache_init(void); | |
796 | extern void sun4v_register_fault_status(void); | |
797 | extern void sun4v_ktsb_register(void); | |
798 | extern void __init cheetah_ecache_flush_init(void); | |
799 | extern void sun4v_patch_tlb_handlers(void); | |
800 | ||
801 | extern unsigned long cmdline_memory_size; | |
802 | ||
b539c467 DM |
803 | extern asmlinkage void do_sparc64_fault(struct pt_regs *regs); |
804 | ||
f5e706ad SR |
805 | #endif /* !(__ASSEMBLY__) */ |
806 | ||
807 | #endif /* !(_SPARC64_PGTABLE_H) */ |