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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 | ||
15 | #include <asm-generic/pgtable-nopud.h> | |
16 | ||
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/system.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 TSB is mapped in the 0x8000000 to 0xa000000 range. | |
29 | * The PROM resides in an area spanning 0xf0000000 to 0x100000000. | |
30 | * The vmalloc area spans 0x100000000 to 0x200000000. | |
31 | * Since modules need to be in the lowest 32-bits of the address space, | |
32 | * we place them right before the OBP area from 0x10000000 to 0xf0000000. | |
33 | * There is a single static kernel PMD which maps from 0x0 to address | |
34 | * 0x400000000. | |
35 | */ | |
36 | #define TLBTEMP_BASE _AC(0x0000000006000000,UL) | |
37 | #define TSBMAP_BASE _AC(0x0000000008000000,UL) | |
38 | #define MODULES_VADDR _AC(0x0000000010000000,UL) | |
39 | #define MODULES_LEN _AC(0x00000000e0000000,UL) | |
40 | #define MODULES_END _AC(0x00000000f0000000,UL) | |
41 | #define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL) | |
42 | #define HI_OBP_ADDRESS _AC(0x0000000100000000,UL) | |
43 | #define VMALLOC_START _AC(0x0000000100000000,UL) | |
44 | #define VMALLOC_END _AC(0x0000000200000000,UL) | |
45 | #define VMEMMAP_BASE _AC(0x0000000200000000,UL) | |
46 | ||
47 | #define vmemmap ((struct page *)VMEMMAP_BASE) | |
48 | ||
49 | /* XXX All of this needs to be rethought so we can take advantage | |
50 | * XXX cheetah's full 64-bit virtual address space, ie. no more hole | |
51 | * XXX in the middle like on spitfire. -DaveM | |
52 | */ | |
53 | /* | |
54 | * Given a virtual address, the lowest PAGE_SHIFT bits determine offset | |
55 | * into the page; the next higher PAGE_SHIFT-3 bits determine the pte# | |
56 | * in the proper pagetable (the -3 is from the 8 byte ptes, and each page | |
57 | * table is a single page long). The next higher PMD_BITS determine pmd# | |
58 | * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2) | |
59 | * since the pmd entries are 4 bytes, and each pmd page is a single page | |
60 | * long). Finally, the higher few bits determine pgde#. | |
61 | */ | |
62 | ||
63 | /* PMD_SHIFT determines the size of the area a second-level page | |
64 | * table can map | |
65 | */ | |
66 | #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) | |
67 | #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) | |
68 | #define PMD_MASK (~(PMD_SIZE-1)) | |
69 | #define PMD_BITS (PAGE_SHIFT - 2) | |
70 | ||
71 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ | |
72 | #define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS) | |
73 | #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) | |
74 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) | |
75 | #define PGDIR_BITS (PAGE_SHIFT - 2) | |
76 | ||
77 | #ifndef __ASSEMBLY__ | |
78 | ||
79 | #include <linux/sched.h> | |
80 | ||
81 | /* Entries per page directory level. */ | |
82 | #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3)) | |
83 | #define PTRS_PER_PMD (1UL << PMD_BITS) | |
84 | #define PTRS_PER_PGD (1UL << PGDIR_BITS) | |
85 | ||
86 | /* Kernel has a separate 44bit address space. */ | |
87 | #define FIRST_USER_ADDRESS 0 | |
88 | ||
89 | #define pte_ERROR(e) __builtin_trap() | |
90 | #define pmd_ERROR(e) __builtin_trap() | |
91 | #define pgd_ERROR(e) __builtin_trap() | |
92 | ||
93 | #endif /* !(__ASSEMBLY__) */ | |
94 | ||
95 | /* PTE bits which are the same in SUN4U and SUN4V format. */ | |
96 | #define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */ | |
97 | #define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/ | |
98 | ||
99 | /* SUN4U pte bits... */ | |
100 | #define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */ | |
101 | #define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */ | |
102 | #define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */ | |
103 | #define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */ | |
104 | #define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */ | |
105 | #define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */ | |
106 | #define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */ | |
107 | #define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */ | |
108 | #define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */ | |
109 | #define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */ | |
110 | #define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */ | |
111 | #define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */ | |
112 | #define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */ | |
113 | #define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */ | |
114 | #define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */ | |
115 | #define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */ | |
116 | #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */ | |
117 | #define _PAGE_FILE_4U _AC(0x0000000000000800,UL) /* Pagecache page */ | |
118 | #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */ | |
119 | #define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */ | |
120 | #define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */ | |
121 | #define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */ | |
122 | #define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */ | |
123 | #define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */ | |
124 | #define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */ | |
125 | #define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */ | |
126 | #define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */ | |
127 | #define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */ | |
128 | ||
129 | /* SUN4V pte bits... */ | |
130 | #define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */ | |
131 | #define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */ | |
132 | #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */ | |
133 | #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */ | |
134 | #define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */ | |
135 | #define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */ | |
136 | #define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */ | |
137 | #define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */ | |
138 | #define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */ | |
139 | #define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */ | |
140 | #define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */ | |
141 | #define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */ | |
142 | #define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */ | |
143 | #define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */ | |
144 | #define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */ | |
145 | #define _PAGE_FILE_4V _AC(0x0000000000000020,UL) /* Pagecache page */ | |
146 | #define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */ | |
147 | #define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */ | |
148 | #define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */ | |
149 | #define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */ | |
150 | #define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */ | |
151 | #define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */ | |
152 | #define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */ | |
153 | #define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */ | |
154 | #define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */ | |
155 | #define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */ | |
156 | #define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */ | |
157 | ||
158 | #if PAGE_SHIFT == 13 | |
159 | #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U | |
160 | #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V | |
161 | #elif PAGE_SHIFT == 16 | |
162 | #define _PAGE_SZBITS_4U _PAGE_SZ64K_4U | |
163 | #define _PAGE_SZBITS_4V _PAGE_SZ64K_4V | |
f5e706ad SR |
164 | #else |
165 | #error Wrong PAGE_SHIFT specified | |
166 | #endif | |
167 | ||
168 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) | |
169 | #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U | |
170 | #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V | |
171 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | |
172 | #define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U | |
173 | #define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V | |
174 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
175 | #define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U | |
176 | #define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V | |
177 | #endif | |
178 | ||
179 | /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */ | |
180 | #define __P000 __pgprot(0) | |
181 | #define __P001 __pgprot(0) | |
182 | #define __P010 __pgprot(0) | |
183 | #define __P011 __pgprot(0) | |
184 | #define __P100 __pgprot(0) | |
185 | #define __P101 __pgprot(0) | |
186 | #define __P110 __pgprot(0) | |
187 | #define __P111 __pgprot(0) | |
188 | ||
189 | #define __S000 __pgprot(0) | |
190 | #define __S001 __pgprot(0) | |
191 | #define __S010 __pgprot(0) | |
192 | #define __S011 __pgprot(0) | |
193 | #define __S100 __pgprot(0) | |
194 | #define __S101 __pgprot(0) | |
195 | #define __S110 __pgprot(0) | |
196 | #define __S111 __pgprot(0) | |
197 | ||
198 | #ifndef __ASSEMBLY__ | |
199 | ||
200 | extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long); | |
201 | ||
202 | extern unsigned long pte_sz_bits(unsigned long size); | |
203 | ||
204 | extern pgprot_t PAGE_KERNEL; | |
205 | extern pgprot_t PAGE_KERNEL_LOCKED; | |
206 | extern pgprot_t PAGE_COPY; | |
207 | extern pgprot_t PAGE_SHARED; | |
208 | ||
209 | /* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */ | |
210 | extern unsigned long _PAGE_IE; | |
211 | extern unsigned long _PAGE_E; | |
212 | extern unsigned long _PAGE_CACHE; | |
213 | ||
214 | extern unsigned long pg_iobits; | |
215 | extern unsigned long _PAGE_ALL_SZ_BITS; | |
216 | extern unsigned long _PAGE_SZBITS; | |
217 | ||
218 | extern struct page *mem_map_zero; | |
219 | #define ZERO_PAGE(vaddr) (mem_map_zero) | |
220 | ||
221 | /* PFNs are real physical page numbers. However, mem_map only begins to record | |
222 | * per-page information starting at pfn_base. This is to handle systems where | |
223 | * the first physical page in the machine is at some huge physical address, | |
224 | * such as 4GB. This is common on a partitioned E10000, for example. | |
225 | */ | |
226 | static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot) | |
227 | { | |
228 | unsigned long paddr = pfn << PAGE_SHIFT; | |
229 | unsigned long sz_bits; | |
230 | ||
231 | sz_bits = 0UL; | |
232 | if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) { | |
233 | __asm__ __volatile__( | |
234 | "\n661: sethi %%uhi(%1), %0\n" | |
235 | " sllx %0, 32, %0\n" | |
236 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
237 | " .word 661b\n" | |
238 | " mov %2, %0\n" | |
239 | " nop\n" | |
240 | " .previous\n" | |
241 | : "=r" (sz_bits) | |
242 | : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V)); | |
243 | } | |
244 | return __pte(paddr | sz_bits | pgprot_val(prot)); | |
245 | } | |
246 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
247 | ||
248 | /* This one can be done with two shifts. */ | |
249 | static inline unsigned long pte_pfn(pte_t pte) | |
250 | { | |
251 | unsigned long ret; | |
252 | ||
253 | __asm__ __volatile__( | |
254 | "\n661: sllx %1, %2, %0\n" | |
255 | " srlx %0, %3, %0\n" | |
256 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
257 | " .word 661b\n" | |
258 | " sllx %1, %4, %0\n" | |
259 | " srlx %0, %5, %0\n" | |
260 | " .previous\n" | |
261 | : "=r" (ret) | |
262 | : "r" (pte_val(pte)), | |
263 | "i" (21), "i" (21 + PAGE_SHIFT), | |
264 | "i" (8), "i" (8 + PAGE_SHIFT)); | |
265 | ||
266 | return ret; | |
267 | } | |
268 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
269 | ||
270 | static inline pte_t pte_modify(pte_t pte, pgprot_t prot) | |
271 | { | |
272 | unsigned long mask, tmp; | |
273 | ||
274 | /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347) | |
275 | * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8) | |
276 | * | |
277 | * Even if we use negation tricks the result is still a 6 | |
278 | * instruction sequence, so don't try to play fancy and just | |
279 | * do the most straightforward implementation. | |
280 | * | |
281 | * Note: We encode this into 3 sun4v 2-insn patch sequences. | |
282 | */ | |
283 | ||
284 | __asm__ __volatile__( | |
285 | "\n661: sethi %%uhi(%2), %1\n" | |
286 | " sethi %%hi(%2), %0\n" | |
287 | "\n662: or %1, %%ulo(%2), %1\n" | |
288 | " or %0, %%lo(%2), %0\n" | |
289 | "\n663: sllx %1, 32, %1\n" | |
290 | " or %0, %1, %0\n" | |
291 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
292 | " .word 661b\n" | |
293 | " sethi %%uhi(%3), %1\n" | |
294 | " sethi %%hi(%3), %0\n" | |
295 | " .word 662b\n" | |
296 | " or %1, %%ulo(%3), %1\n" | |
297 | " or %0, %%lo(%3), %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 | _PAGE_PRESENT_4U | | |
305 | _PAGE_SZBITS_4U), | |
306 | "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | | |
307 | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V | | |
308 | _PAGE_SZBITS_4V)); | |
309 | ||
310 | return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask)); | |
311 | } | |
312 | ||
313 | static inline pte_t pgoff_to_pte(unsigned long off) | |
314 | { | |
315 | off <<= PAGE_SHIFT; | |
316 | ||
317 | __asm__ __volatile__( | |
318 | "\n661: or %0, %2, %0\n" | |
319 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
320 | " .word 661b\n" | |
321 | " or %0, %3, %0\n" | |
322 | " .previous\n" | |
323 | : "=r" (off) | |
324 | : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V)); | |
325 | ||
326 | return __pte(off); | |
327 | } | |
328 | ||
329 | static inline pgprot_t pgprot_noncached(pgprot_t prot) | |
330 | { | |
331 | unsigned long val = pgprot_val(prot); | |
332 | ||
333 | __asm__ __volatile__( | |
334 | "\n661: andn %0, %2, %0\n" | |
335 | " or %0, %3, %0\n" | |
336 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
337 | " .word 661b\n" | |
338 | " andn %0, %4, %0\n" | |
339 | " or %0, %5, %0\n" | |
340 | " .previous\n" | |
341 | : "=r" (val) | |
342 | : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U), | |
343 | "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V)); | |
344 | ||
345 | return __pgprot(val); | |
346 | } | |
347 | /* Various pieces of code check for platform support by ifdef testing | |
348 | * on "pgprot_noncached". That's broken and should be fixed, but for | |
349 | * now... | |
350 | */ | |
351 | #define pgprot_noncached pgprot_noncached | |
352 | ||
353 | #ifdef CONFIG_HUGETLB_PAGE | |
354 | static inline pte_t pte_mkhuge(pte_t pte) | |
355 | { | |
356 | unsigned long mask; | |
357 | ||
358 | __asm__ __volatile__( | |
359 | "\n661: sethi %%uhi(%1), %0\n" | |
360 | " sllx %0, 32, %0\n" | |
361 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
362 | " .word 661b\n" | |
363 | " mov %2, %0\n" | |
364 | " nop\n" | |
365 | " .previous\n" | |
366 | : "=r" (mask) | |
367 | : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V)); | |
368 | ||
369 | return __pte(pte_val(pte) | mask); | |
370 | } | |
371 | #endif | |
372 | ||
373 | static inline pte_t pte_mkdirty(pte_t pte) | |
374 | { | |
375 | unsigned long val = pte_val(pte), tmp; | |
376 | ||
377 | __asm__ __volatile__( | |
378 | "\n661: or %0, %3, %0\n" | |
379 | " nop\n" | |
380 | "\n662: nop\n" | |
381 | " nop\n" | |
382 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
383 | " .word 661b\n" | |
384 | " sethi %%uhi(%4), %1\n" | |
385 | " sllx %1, 32, %1\n" | |
386 | " .word 662b\n" | |
387 | " or %1, %%lo(%4), %1\n" | |
388 | " or %0, %1, %0\n" | |
389 | " .previous\n" | |
390 | : "=r" (val), "=r" (tmp) | |
391 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), | |
392 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
393 | ||
394 | return __pte(val); | |
395 | } | |
396 | ||
397 | static inline pte_t pte_mkclean(pte_t pte) | |
398 | { | |
399 | unsigned long val = pte_val(pte), tmp; | |
400 | ||
401 | __asm__ __volatile__( | |
402 | "\n661: andn %0, %3, %0\n" | |
403 | " nop\n" | |
404 | "\n662: nop\n" | |
405 | " nop\n" | |
406 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
407 | " .word 661b\n" | |
408 | " sethi %%uhi(%4), %1\n" | |
409 | " sllx %1, 32, %1\n" | |
410 | " .word 662b\n" | |
411 | " or %1, %%lo(%4), %1\n" | |
412 | " andn %0, %1, %0\n" | |
413 | " .previous\n" | |
414 | : "=r" (val), "=r" (tmp) | |
415 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), | |
416 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
417 | ||
418 | return __pte(val); | |
419 | } | |
420 | ||
421 | static inline pte_t pte_mkwrite(pte_t pte) | |
422 | { | |
423 | unsigned long val = pte_val(pte), mask; | |
424 | ||
425 | __asm__ __volatile__( | |
426 | "\n661: mov %1, %0\n" | |
427 | " nop\n" | |
428 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
429 | " .word 661b\n" | |
430 | " sethi %%uhi(%2), %0\n" | |
431 | " sllx %0, 32, %0\n" | |
432 | " .previous\n" | |
433 | : "=r" (mask) | |
434 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); | |
435 | ||
436 | return __pte(val | mask); | |
437 | } | |
438 | ||
439 | static inline pte_t pte_wrprotect(pte_t pte) | |
440 | { | |
441 | unsigned long val = pte_val(pte), tmp; | |
442 | ||
443 | __asm__ __volatile__( | |
444 | "\n661: andn %0, %3, %0\n" | |
445 | " nop\n" | |
446 | "\n662: nop\n" | |
447 | " nop\n" | |
448 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
449 | " .word 661b\n" | |
450 | " sethi %%uhi(%4), %1\n" | |
451 | " sllx %1, 32, %1\n" | |
452 | " .word 662b\n" | |
453 | " or %1, %%lo(%4), %1\n" | |
454 | " andn %0, %1, %0\n" | |
455 | " .previous\n" | |
456 | : "=r" (val), "=r" (tmp) | |
457 | : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U), | |
458 | "i" (_PAGE_WRITE_4V | _PAGE_W_4V)); | |
459 | ||
460 | return __pte(val); | |
461 | } | |
462 | ||
463 | static inline pte_t pte_mkold(pte_t pte) | |
464 | { | |
465 | unsigned long mask; | |
466 | ||
467 | __asm__ __volatile__( | |
468 | "\n661: mov %1, %0\n" | |
469 | " nop\n" | |
470 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
471 | " .word 661b\n" | |
472 | " sethi %%uhi(%2), %0\n" | |
473 | " sllx %0, 32, %0\n" | |
474 | " .previous\n" | |
475 | : "=r" (mask) | |
476 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
477 | ||
478 | mask |= _PAGE_R; | |
479 | ||
480 | return __pte(pte_val(pte) & ~mask); | |
481 | } | |
482 | ||
483 | static inline pte_t pte_mkyoung(pte_t pte) | |
484 | { | |
485 | unsigned long mask; | |
486 | ||
487 | __asm__ __volatile__( | |
488 | "\n661: mov %1, %0\n" | |
489 | " nop\n" | |
490 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
491 | " .word 661b\n" | |
492 | " sethi %%uhi(%2), %0\n" | |
493 | " sllx %0, 32, %0\n" | |
494 | " .previous\n" | |
495 | : "=r" (mask) | |
496 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
497 | ||
498 | mask |= _PAGE_R; | |
499 | ||
500 | return __pte(pte_val(pte) | mask); | |
501 | } | |
502 | ||
503 | static inline pte_t pte_mkspecial(pte_t pte) | |
504 | { | |
505 | return pte; | |
506 | } | |
507 | ||
508 | static inline unsigned long pte_young(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 | return (pte_val(pte) & mask); | |
524 | } | |
525 | ||
526 | static inline unsigned long pte_dirty(pte_t pte) | |
527 | { | |
528 | unsigned long mask; | |
529 | ||
530 | __asm__ __volatile__( | |
531 | "\n661: mov %1, %0\n" | |
532 | " nop\n" | |
533 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
534 | " .word 661b\n" | |
535 | " sethi %%uhi(%2), %0\n" | |
536 | " sllx %0, 32, %0\n" | |
537 | " .previous\n" | |
538 | : "=r" (mask) | |
539 | : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V)); | |
540 | ||
541 | return (pte_val(pte) & mask); | |
542 | } | |
543 | ||
544 | static inline unsigned long pte_write(pte_t pte) | |
545 | { | |
546 | unsigned long mask; | |
547 | ||
548 | __asm__ __volatile__( | |
549 | "\n661: mov %1, %0\n" | |
550 | " nop\n" | |
551 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
552 | " .word 661b\n" | |
553 | " sethi %%uhi(%2), %0\n" | |
554 | " sllx %0, 32, %0\n" | |
555 | " .previous\n" | |
556 | : "=r" (mask) | |
557 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); | |
558 | ||
559 | return (pte_val(pte) & mask); | |
560 | } | |
561 | ||
562 | static inline unsigned long pte_exec(pte_t pte) | |
563 | { | |
564 | unsigned long mask; | |
565 | ||
566 | __asm__ __volatile__( | |
567 | "\n661: sethi %%hi(%1), %0\n" | |
568 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
569 | " .word 661b\n" | |
570 | " mov %2, %0\n" | |
571 | " .previous\n" | |
572 | : "=r" (mask) | |
573 | : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V)); | |
574 | ||
575 | return (pte_val(pte) & mask); | |
576 | } | |
577 | ||
578 | static inline unsigned long pte_file(pte_t pte) | |
579 | { | |
580 | unsigned long val = pte_val(pte); | |
581 | ||
582 | __asm__ __volatile__( | |
583 | "\n661: and %0, %2, %0\n" | |
584 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
585 | " .word 661b\n" | |
586 | " and %0, %3, %0\n" | |
587 | " .previous\n" | |
588 | : "=r" (val) | |
589 | : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V)); | |
590 | ||
591 | return val; | |
592 | } | |
593 | ||
594 | static inline unsigned long pte_present(pte_t pte) | |
595 | { | |
596 | unsigned long val = pte_val(pte); | |
597 | ||
598 | __asm__ __volatile__( | |
599 | "\n661: and %0, %2, %0\n" | |
600 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
601 | " .word 661b\n" | |
602 | " and %0, %3, %0\n" | |
603 | " .previous\n" | |
604 | : "=r" (val) | |
605 | : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V)); | |
606 | ||
607 | return val; | |
608 | } | |
609 | ||
610 | static inline int pte_special(pte_t pte) | |
611 | { | |
612 | return 0; | |
613 | } | |
614 | ||
615 | #define pmd_set(pmdp, ptep) \ | |
616 | (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL)) | |
617 | #define pud_set(pudp, pmdp) \ | |
618 | (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL)) | |
619 | #define __pmd_page(pmd) \ | |
620 | ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL))) | |
621 | #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) | |
622 | #define pud_page_vaddr(pud) \ | |
623 | ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL))) | |
624 | #define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud)) | |
625 | #define pmd_none(pmd) (!pmd_val(pmd)) | |
626 | #define pmd_bad(pmd) (0) | |
627 | #define pmd_present(pmd) (pmd_val(pmd) != 0U) | |
628 | #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U) | |
629 | #define pud_none(pud) (!pud_val(pud)) | |
630 | #define pud_bad(pud) (0) | |
631 | #define pud_present(pud) (pud_val(pud) != 0U) | |
632 | #define pud_clear(pudp) (pud_val(*(pudp)) = 0U) | |
633 | ||
634 | /* Same in both SUN4V and SUN4U. */ | |
635 | #define pte_none(pte) (!pte_val(pte)) | |
636 | ||
637 | /* to find an entry in a page-table-directory. */ | |
638 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
639 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | |
640 | ||
641 | /* to find an entry in a kernel page-table-directory */ | |
642 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
643 | ||
644 | /* Find an entry in the second-level page table.. */ | |
645 | #define pmd_offset(pudp, address) \ | |
646 | ((pmd_t *) pud_page_vaddr(*(pudp)) + \ | |
647 | (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))) | |
648 | ||
649 | /* Find an entry in the third-level page table.. */ | |
650 | #define pte_index(dir, address) \ | |
651 | ((pte_t *) __pmd_page(*(dir)) + \ | |
652 | ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) | |
653 | #define pte_offset_kernel pte_index | |
654 | #define pte_offset_map pte_index | |
655 | #define pte_offset_map_nested pte_index | |
656 | #define pte_unmap(pte) do { } while (0) | |
657 | #define pte_unmap_nested(pte) do { } while (0) | |
658 | ||
659 | /* Actual page table PTE updates. */ | |
660 | extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig); | |
661 | ||
662 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) | |
663 | { | |
664 | pte_t orig = *ptep; | |
665 | ||
666 | *ptep = pte; | |
667 | ||
668 | /* It is more efficient to let flush_tlb_kernel_range() | |
669 | * handle init_mm tlb flushes. | |
670 | * | |
671 | * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U | |
672 | * and SUN4V pte layout, so this inline test is fine. | |
673 | */ | |
674 | if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID)) | |
675 | tlb_batch_add(mm, addr, ptep, orig); | |
676 | } | |
677 | ||
678 | #define pte_clear(mm,addr,ptep) \ | |
679 | set_pte_at((mm), (addr), (ptep), __pte(0UL)) | |
680 | ||
681 | #ifdef DCACHE_ALIASING_POSSIBLE | |
682 | #define __HAVE_ARCH_MOVE_PTE | |
683 | #define move_pte(pte, prot, old_addr, new_addr) \ | |
684 | ({ \ | |
685 | pte_t newpte = (pte); \ | |
686 | if (tlb_type != hypervisor && pte_present(pte)) { \ | |
687 | unsigned long this_pfn = pte_pfn(pte); \ | |
688 | \ | |
689 | if (pfn_valid(this_pfn) && \ | |
690 | (((old_addr) ^ (new_addr)) & (1 << 13))) \ | |
691 | flush_dcache_page_all(current->mm, \ | |
692 | pfn_to_page(this_pfn)); \ | |
693 | } \ | |
694 | newpte; \ | |
695 | }) | |
696 | #endif | |
697 | ||
698 | extern pgd_t swapper_pg_dir[2048]; | |
699 | extern pmd_t swapper_low_pmd_dir[2048]; | |
700 | ||
701 | extern void paging_init(void); | |
702 | extern unsigned long find_ecache_flush_span(unsigned long size); | |
703 | ||
704 | /* These do nothing with the way I have things setup. */ | |
705 | #define mmu_lockarea(vaddr, len) (vaddr) | |
706 | #define mmu_unlockarea(vaddr, len) do { } while(0) | |
707 | ||
708 | struct vm_area_struct; | |
709 | extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t); | |
710 | ||
711 | /* Encode and de-code a swap entry */ | |
712 | #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) | |
713 | #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL)) | |
714 | #define __swp_entry(type, offset) \ | |
715 | ( (swp_entry_t) \ | |
716 | { \ | |
717 | (((long)(type) << PAGE_SHIFT) | \ | |
718 | ((long)(offset) << (PAGE_SHIFT + 8UL))) \ | |
719 | } ) | |
720 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
721 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
722 | ||
723 | /* File offset in PTE support. */ | |
724 | extern unsigned long pte_file(pte_t); | |
725 | #define pte_to_pgoff(pte) (pte_val(pte) >> PAGE_SHIFT) | |
726 | extern pte_t pgoff_to_pte(unsigned long); | |
727 | #define PTE_FILE_MAX_BITS (64UL - PAGE_SHIFT - 1UL) | |
728 | ||
729 | extern unsigned long *sparc64_valid_addr_bitmap; | |
730 | ||
731 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | |
732 | #define kern_addr_valid(addr) \ | |
733 | (test_bit(__pa((unsigned long)(addr))>>22, sparc64_valid_addr_bitmap)) | |
734 | ||
735 | extern int page_in_phys_avail(unsigned long paddr); | |
736 | ||
737 | extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, | |
738 | unsigned long pfn, | |
739 | unsigned long size, pgprot_t prot); | |
740 | ||
741 | /* | |
742 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | |
743 | * its high 4 bits. These macros/functions put it there or get it from there. | |
744 | */ | |
745 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | |
746 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | |
747 | #define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL) | |
748 | ||
749 | #include <asm-generic/pgtable.h> | |
750 | ||
751 | /* We provide our own get_unmapped_area to cope with VA holes and | |
752 | * SHM area cache aliasing for userland. | |
753 | */ | |
754 | #define HAVE_ARCH_UNMAPPED_AREA | |
755 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN | |
756 | ||
757 | /* We provide a special get_unmapped_area for framebuffer mmaps to try and use | |
758 | * the largest alignment possible such that larget PTEs can be used. | |
759 | */ | |
760 | extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long, | |
761 | unsigned long, unsigned long, | |
762 | unsigned long); | |
763 | #define HAVE_ARCH_FB_UNMAPPED_AREA | |
764 | ||
765 | extern void pgtable_cache_init(void); | |
766 | extern void sun4v_register_fault_status(void); | |
767 | extern void sun4v_ktsb_register(void); | |
768 | extern void __init cheetah_ecache_flush_init(void); | |
769 | extern void sun4v_patch_tlb_handlers(void); | |
770 | ||
771 | extern unsigned long cmdline_memory_size; | |
772 | ||
773 | #endif /* !(__ASSEMBLY__) */ | |
774 | ||
775 | #endif /* !(_SPARC64_PGTABLE_H) */ |