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1da177e4 LT |
1 | /* $Id: pgtable.h,v 1.156 2002/02/09 19:49:31 davem Exp $ |
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/config.h> | |
18 | #include <linux/compiler.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 | #include <asm/const.h> | |
26 | ||
729b4f7d | 27 | /* The kernel image occupies 0x4000000 to 0x1000000 (4MB --> 32MB). |
74bf4312 DM |
28 | * The page copy blockops can use 0x2000000 to 0x4000000. |
29 | * The TSB is mapped in the 0x4000000 to 0x6000000 range. | |
1da177e4 | 30 | * The PROM resides in an area spanning 0xf0000000 to 0x100000000. |
729b4f7d DM |
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. | |
1da177e4 LT |
34 | * There is a single static kernel PMD which maps from 0x0 to address |
35 | * 0x400000000. | |
36 | */ | |
729b4f7d | 37 | #define TLBTEMP_BASE _AC(0x0000000002000000,UL) |
74bf4312 | 38 | #define TSBMAP_BASE _AC(0x0000000004000000,UL) |
729b4f7d DM |
39 | #define MODULES_VADDR _AC(0x0000000010000000,UL) |
40 | #define MODULES_LEN _AC(0x00000000e0000000,UL) | |
41 | #define MODULES_END _AC(0x00000000f0000000,UL) | |
1da177e4 LT |
42 | #define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL) |
43 | #define HI_OBP_ADDRESS _AC(0x0000000100000000,UL) | |
729b4f7d DM |
44 | #define VMALLOC_START _AC(0x0000000100000000,UL) |
45 | #define VMALLOC_END _AC(0x0000000200000000,UL) | |
1da177e4 LT |
46 | |
47 | /* XXX All of this needs to be rethought so we can take advantage | |
48 | * XXX cheetah's full 64-bit virtual address space, ie. no more hole | |
49 | * XXX in the middle like on spitfire. -DaveM | |
50 | */ | |
51 | /* | |
52 | * Given a virtual address, the lowest PAGE_SHIFT bits determine offset | |
53 | * into the page; the next higher PAGE_SHIFT-3 bits determine the pte# | |
54 | * in the proper pagetable (the -3 is from the 8 byte ptes, and each page | |
55 | * table is a single page long). The next higher PMD_BITS determine pmd# | |
56 | * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2) | |
57 | * since the pmd entries are 4 bytes, and each pmd page is a single page | |
58 | * long). Finally, the higher few bits determine pgde#. | |
59 | */ | |
60 | ||
61 | /* PMD_SHIFT determines the size of the area a second-level page | |
62 | * table can map | |
63 | */ | |
64 | #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) | |
56425306 | 65 | #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) |
1da177e4 LT |
66 | #define PMD_MASK (~(PMD_SIZE-1)) |
67 | #define PMD_BITS (PAGE_SHIFT - 2) | |
68 | ||
69 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ | |
70 | #define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS) | |
56425306 | 71 | #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) |
1da177e4 LT |
72 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
73 | #define PGDIR_BITS (PAGE_SHIFT - 2) | |
74 | ||
75 | #ifndef __ASSEMBLY__ | |
76 | ||
77 | #include <linux/sched.h> | |
78 | ||
79 | /* Entries per page directory level. */ | |
80 | #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3)) | |
81 | #define PTRS_PER_PMD (1UL << PMD_BITS) | |
82 | #define PTRS_PER_PGD (1UL << PGDIR_BITS) | |
83 | ||
84 | /* Kernel has a separate 44bit address space. */ | |
d455a369 | 85 | #define FIRST_USER_ADDRESS 0 |
1da177e4 LT |
86 | |
87 | #define pte_ERROR(e) __builtin_trap() | |
88 | #define pmd_ERROR(e) __builtin_trap() | |
89 | #define pgd_ERROR(e) __builtin_trap() | |
90 | ||
91 | #endif /* !(__ASSEMBLY__) */ | |
92 | ||
c4bce90e | 93 | /* PTE bits which are the same in SUN4U and SUN4V format. */ |
ff02e0d2 DM |
94 | #define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */ |
95 | #define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/ | |
96 | ||
97 | /* SUN4U pte bits... */ | |
98 | #define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */ | |
99 | #define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */ | |
100 | #define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */ | |
101 | #define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */ | |
102 | #define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */ | |
103 | #define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */ | |
104 | #define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */ | |
105 | #define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */ | |
106 | #define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */ | |
107 | #define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */ | |
dcc1e8dd | 108 | #define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */ |
ff02e0d2 DM |
109 | #define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */ |
110 | #define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */ | |
111 | #define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */ | |
112 | #define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */ | |
113 | #define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */ | |
114 | #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */ | |
115 | #define _PAGE_FILE_4U _AC(0x0000000000000800,UL) /* Pagecache page */ | |
116 | #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */ | |
117 | #define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */ | |
118 | #define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */ | |
119 | #define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */ | |
120 | #define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */ | |
121 | #define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */ | |
122 | #define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */ | |
123 | #define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */ | |
124 | #define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */ | |
125 | #define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */ | |
126 | ||
127 | /* SUN4V pte bits... */ | |
128 | #define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */ | |
129 | #define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */ | |
130 | #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */ | |
131 | #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */ | |
132 | #define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */ | |
133 | #define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */ | |
134 | #define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */ | |
135 | #define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */ | |
136 | #define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */ | |
137 | #define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */ | |
138 | #define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */ | |
139 | #define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */ | |
140 | #define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */ | |
141 | #define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */ | |
142 | #define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */ | |
143 | #define _PAGE_FILE_4V _AC(0x0000000000000020,UL) /* Pagecache page */ | |
144 | #define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */ | |
145 | #define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */ | |
146 | #define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */ | |
147 | #define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */ | |
148 | #define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */ | |
149 | #define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */ | |
150 | #define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */ | |
151 | #define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */ | |
152 | #define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */ | |
153 | #define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */ | |
dcc1e8dd | 154 | #define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */ |
ff02e0d2 DM |
155 | |
156 | #if PAGE_SHIFT == 13 | |
157 | #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U | |
158 | #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V | |
159 | #elif PAGE_SHIFT == 16 | |
160 | #define _PAGE_SZBITS_4U _PAGE_SZ64K_4U | |
161 | #define _PAGE_SZBITS_4V _PAGE_SZ64K_4V | |
162 | #elif PAGE_SHIFT == 19 | |
163 | #define _PAGE_SZBITS_4U _PAGE_SZ512K_4U | |
164 | #define _PAGE_SZBITS_4V _PAGE_SZ512K_4V | |
165 | #elif PAGE_SHIFT == 22 | |
166 | #define _PAGE_SZBITS_4U _PAGE_SZ4MB_4U | |
167 | #define _PAGE_SZBITS_4V _PAGE_SZ4MB_4V | |
168 | #else | |
169 | #error Wrong PAGE_SHIFT specified | |
170 | #endif | |
171 | ||
172 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) | |
173 | #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U | |
174 | #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V | |
175 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | |
176 | #define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U | |
177 | #define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V | |
178 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
179 | #define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U | |
180 | #define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V | |
181 | #endif | |
c4bce90e DM |
182 | |
183 | /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */ | |
184 | #define __P000 __pgprot(0) | |
185 | #define __P001 __pgprot(0) | |
186 | #define __P010 __pgprot(0) | |
187 | #define __P011 __pgprot(0) | |
188 | #define __P100 __pgprot(0) | |
189 | #define __P101 __pgprot(0) | |
190 | #define __P110 __pgprot(0) | |
191 | #define __P111 __pgprot(0) | |
192 | ||
193 | #define __S000 __pgprot(0) | |
194 | #define __S001 __pgprot(0) | |
195 | #define __S010 __pgprot(0) | |
196 | #define __S011 __pgprot(0) | |
197 | #define __S100 __pgprot(0) | |
198 | #define __S101 __pgprot(0) | |
199 | #define __S110 __pgprot(0) | |
200 | #define __S111 __pgprot(0) | |
1da177e4 LT |
201 | |
202 | #ifndef __ASSEMBLY__ | |
203 | ||
c4bce90e DM |
204 | extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long); |
205 | ||
206 | extern unsigned long pte_sz_bits(unsigned long size); | |
207 | ||
208 | extern pgprot_t PAGE_KERNEL; | |
209 | extern pgprot_t PAGE_KERNEL_LOCKED; | |
210 | extern pgprot_t PAGE_COPY; | |
0f15952a | 211 | extern pgprot_t PAGE_SHARED; |
c4bce90e DM |
212 | |
213 | /* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */ | |
214 | extern unsigned long _PAGE_IE; | |
215 | extern unsigned long _PAGE_E; | |
216 | extern unsigned long _PAGE_CACHE; | |
217 | ||
218 | extern unsigned long pg_iobits; | |
219 | extern unsigned long _PAGE_ALL_SZ_BITS; | |
220 | extern unsigned long _PAGE_SZBITS; | |
221 | ||
1da177e4 LT |
222 | extern struct page *mem_map_zero; |
223 | #define ZERO_PAGE(vaddr) (mem_map_zero) | |
224 | ||
225 | /* PFNs are real physical page numbers. However, mem_map only begins to record | |
226 | * per-page information starting at pfn_base. This is to handle systems where | |
227 | * the first physical page in the machine is at some huge physical address, | |
228 | * such as 4GB. This is common on a partitioned E10000, for example. | |
229 | */ | |
cf627156 DM |
230 | static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot) |
231 | { | |
232 | unsigned long paddr = pfn << PAGE_SHIFT; | |
233 | unsigned long sz_bits; | |
234 | ||
cf627156 DM |
235 | sz_bits = 0UL; |
236 | if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) { | |
cf627156 DM |
237 | __asm__ __volatile__( |
238 | "\n661: sethi %uhi(%1), %0\n" | |
239 | " sllx %0, 32, %0\n" | |
240 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
241 | " .word 661b\n" | |
242 | " mov %2, %0\n" | |
243 | " nop\n" | |
244 | " .previous\n" | |
245 | : "=r" (sz_bits) | |
246 | : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V)); | |
247 | } | |
248 | return __pte(paddr | sz_bits | pgprot_val(prot)); | |
249 | } | |
1da177e4 | 250 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
cf627156 DM |
251 | |
252 | /* This one can be done with two shifts. */ | |
253 | static inline unsigned long pte_pfn(pte_t pte) | |
254 | { | |
cf627156 DM |
255 | unsigned long ret; |
256 | ||
257 | __asm__ __volatile__( | |
258 | "\n661: sllx %1, %2, %0\n" | |
259 | " srlx %0, %3, %0\n" | |
260 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
261 | " .word 661b\n" | |
262 | " sllx %1, %4, %0\n" | |
263 | " srlx %0, %5, %0\n" | |
264 | " .previous\n" | |
265 | : "=r" (ret) | |
266 | : "r" (pte_val(pte)), | |
50f4f23c DM |
267 | "i" (21), "i" (21 + PAGE_SHIFT), |
268 | "i" (8), "i" (8 + PAGE_SHIFT)); | |
cf627156 DM |
269 | |
270 | return ret; | |
271 | } | |
c4bce90e | 272 | #define pte_page(x) pfn_to_page(pte_pfn(x)) |
cf627156 DM |
273 | |
274 | static inline pte_t pte_modify(pte_t pte, pgprot_t prot) | |
275 | { | |
cf627156 DM |
276 | unsigned long mask, tmp; |
277 | ||
278 | /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347) | |
279 | * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8) | |
280 | * | |
281 | * Even if we use negation tricks the result is still a 6 | |
282 | * instruction sequence, so don't try to play fancy and just | |
283 | * do the most straightforward implementation. | |
284 | * | |
285 | * Note: We encode this into 3 sun4v 2-insn patch sequences. | |
286 | */ | |
287 | ||
288 | __asm__ __volatile__( | |
289 | "\n661: sethi %%uhi(%2), %1\n" | |
290 | " sethi %%hi(%2), %0\n" | |
291 | "\n662: or %1, %%ulo(%2), %1\n" | |
292 | " or %0, %%lo(%2), %0\n" | |
293 | "\n663: sllx %1, 32, %1\n" | |
294 | " or %0, %1, %0\n" | |
295 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
296 | " .word 661b\n" | |
297 | " sethi %%uhi(%3), %1\n" | |
298 | " sethi %%hi(%3), %0\n" | |
299 | " .word 662b\n" | |
300 | " or %1, %%ulo(%3), %1\n" | |
301 | " or %0, %%lo(%3), %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) | |
50f4f23c DM |
307 | : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U | |
308 | _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U | | |
309 | _PAGE_SZBITS_4U), | |
310 | "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | | |
311 | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V | | |
312 | _PAGE_SZBITS_4V)); | |
cf627156 DM |
313 | |
314 | return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask)); | |
315 | } | |
316 | ||
317 | static inline pte_t pgoff_to_pte(unsigned long off) | |
318 | { | |
319 | off <<= PAGE_SHIFT; | |
320 | ||
cf627156 DM |
321 | __asm__ __volatile__( |
322 | "\n661: or %0, %2, %0\n" | |
323 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
324 | " .word 661b\n" | |
325 | " or %0, %3, %0\n" | |
326 | " .previous\n" | |
327 | : "=r" (off) | |
328 | : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V)); | |
329 | ||
330 | return __pte(off); | |
331 | } | |
332 | ||
333 | static inline pgprot_t pgprot_noncached(pgprot_t prot) | |
334 | { | |
335 | unsigned long val = pgprot_val(prot); | |
336 | ||
cf627156 DM |
337 | __asm__ __volatile__( |
338 | "\n661: andn %0, %2, %0\n" | |
339 | " or %0, %3, %0\n" | |
340 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
341 | " .word 661b\n" | |
342 | " andn %0, %4, %0\n" | |
343 | " or %0, %3, %0\n" | |
344 | " .previous\n" | |
345 | : "=r" (val) | |
346 | : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U), | |
347 | "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_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 | ||
f6c1fe52 | 357 | #ifdef CONFIG_HUGETLB_PAGE |
cf627156 DM |
358 | static inline pte_t pte_mkhuge(pte_t pte) |
359 | { | |
cf627156 DM |
360 | unsigned long mask; |
361 | ||
cf627156 DM |
362 | __asm__ __volatile__( |
363 | "\n661: sethi %%uhi(%1), %0\n" | |
364 | " sllx %0, 32, %0\n" | |
365 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
366 | " .word 661b\n" | |
367 | " mov %2, %0\n" | |
368 | " nop\n" | |
369 | " .previous\n" | |
370 | : "=r" (mask) | |
50f4f23c | 371 | : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V)); |
cf627156 DM |
372 | |
373 | return __pte(pte_val(pte) | mask); | |
374 | } | |
f6c1fe52 | 375 | #endif |
cf627156 DM |
376 | |
377 | static inline pte_t pte_mkdirty(pte_t pte) | |
378 | { | |
cf627156 DM |
379 | unsigned long val = pte_val(pte), tmp; |
380 | ||
cf627156 DM |
381 | __asm__ __volatile__( |
382 | "\n661: or %0, %3, %0\n" | |
383 | " nop\n" | |
384 | "\n662: nop\n" | |
385 | " nop\n" | |
386 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
387 | " .word 661b\n" | |
388 | " sethi %%uhi(%4), %1\n" | |
389 | " sllx %1, 32, %1\n" | |
390 | " .word 662b\n" | |
391 | " or %1, %%lo(%4), %1\n" | |
392 | " or %0, %1, %0\n" | |
393 | " .previous\n" | |
394 | : "=r" (val), "=r" (tmp) | |
50f4f23c DM |
395 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), |
396 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
cf627156 DM |
397 | |
398 | return __pte(val); | |
399 | } | |
400 | ||
401 | static inline pte_t pte_mkclean(pte_t pte) | |
402 | { | |
cf627156 DM |
403 | unsigned long val = pte_val(pte), tmp; |
404 | ||
cf627156 DM |
405 | __asm__ __volatile__( |
406 | "\n661: andn %0, %3, %0\n" | |
407 | " nop\n" | |
408 | "\n662: nop\n" | |
409 | " nop\n" | |
410 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
411 | " .word 661b\n" | |
412 | " sethi %%uhi(%4), %1\n" | |
413 | " sllx %1, 32, %1\n" | |
414 | " .word 662b\n" | |
415 | " or %1, %%lo(%4), %1\n" | |
416 | " andn %0, %1, %0\n" | |
417 | " .previous\n" | |
418 | : "=r" (val), "=r" (tmp) | |
50f4f23c DM |
419 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), |
420 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
cf627156 DM |
421 | |
422 | return __pte(val); | |
423 | } | |
424 | ||
425 | static inline pte_t pte_mkwrite(pte_t pte) | |
426 | { | |
cf627156 DM |
427 | unsigned long val = pte_val(pte), mask; |
428 | ||
cf627156 DM |
429 | __asm__ __volatile__( |
430 | "\n661: mov %1, %0\n" | |
431 | " nop\n" | |
432 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
433 | " .word 661b\n" | |
434 | " sethi %%uhi(%2), %0\n" | |
435 | " sllx %0, 32, %0\n" | |
436 | " .previous\n" | |
437 | : "=r" (mask) | |
50f4f23c | 438 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); |
cf627156 DM |
439 | |
440 | return __pte(val | mask); | |
441 | } | |
442 | ||
443 | static inline pte_t pte_wrprotect(pte_t pte) | |
444 | { | |
cf627156 DM |
445 | unsigned long val = pte_val(pte), tmp; |
446 | ||
cf627156 DM |
447 | __asm__ __volatile__( |
448 | "\n661: andn %0, %3, %0\n" | |
449 | " nop\n" | |
450 | "\n662: nop\n" | |
451 | " nop\n" | |
452 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
453 | " .word 661b\n" | |
454 | " sethi %%uhi(%4), %1\n" | |
455 | " sllx %1, 32, %1\n" | |
456 | " .word 662b\n" | |
457 | " or %1, %%lo(%4), %1\n" | |
458 | " andn %0, %1, %0\n" | |
459 | " .previous\n" | |
460 | : "=r" (val), "=r" (tmp) | |
50f4f23c DM |
461 | : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U), |
462 | "i" (_PAGE_WRITE_4V | _PAGE_W_4V)); | |
cf627156 DM |
463 | |
464 | return __pte(val); | |
465 | } | |
466 | ||
467 | static inline pte_t pte_mkold(pte_t pte) | |
468 | { | |
cf627156 DM |
469 | unsigned long mask; |
470 | ||
cf627156 DM |
471 | __asm__ __volatile__( |
472 | "\n661: mov %1, %0\n" | |
473 | " nop\n" | |
474 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
475 | " .word 661b\n" | |
476 | " sethi %%uhi(%2), %0\n" | |
477 | " sllx %0, 32, %0\n" | |
478 | " .previous\n" | |
479 | : "=r" (mask) | |
50f4f23c | 480 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); |
cf627156 DM |
481 | |
482 | mask |= _PAGE_R; | |
483 | ||
484 | return __pte(pte_val(pte) & ~mask); | |
485 | } | |
486 | ||
487 | static inline pte_t pte_mkyoung(pte_t pte) | |
488 | { | |
cf627156 DM |
489 | unsigned long mask; |
490 | ||
cf627156 DM |
491 | __asm__ __volatile__( |
492 | "\n661: mov %1, %0\n" | |
493 | " nop\n" | |
494 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
495 | " .word 661b\n" | |
496 | " sethi %%uhi(%2), %0\n" | |
497 | " sllx %0, 32, %0\n" | |
498 | " .previous\n" | |
499 | : "=r" (mask) | |
50f4f23c | 500 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); |
cf627156 DM |
501 | |
502 | mask |= _PAGE_R; | |
503 | ||
504 | return __pte(pte_val(pte) | mask); | |
505 | } | |
506 | ||
507 | static inline unsigned long pte_young(pte_t pte) | |
508 | { | |
cf627156 DM |
509 | unsigned long mask; |
510 | ||
cf627156 DM |
511 | __asm__ __volatile__( |
512 | "\n661: mov %1, %0\n" | |
513 | " nop\n" | |
514 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
515 | " .word 661b\n" | |
516 | " sethi %%uhi(%2), %0\n" | |
517 | " sllx %0, 32, %0\n" | |
518 | " .previous\n" | |
519 | : "=r" (mask) | |
50f4f23c | 520 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); |
cf627156 DM |
521 | |
522 | return (pte_val(pte) & mask); | |
523 | } | |
524 | ||
525 | static inline unsigned long pte_dirty(pte_t pte) | |
526 | { | |
cf627156 DM |
527 | unsigned long mask; |
528 | ||
cf627156 DM |
529 | __asm__ __volatile__( |
530 | "\n661: mov %1, %0\n" | |
531 | " nop\n" | |
532 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
533 | " .word 661b\n" | |
534 | " sethi %%uhi(%2), %0\n" | |
535 | " sllx %0, 32, %0\n" | |
536 | " .previous\n" | |
537 | : "=r" (mask) | |
50f4f23c | 538 | : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V)); |
cf627156 DM |
539 | |
540 | return (pte_val(pte) & mask); | |
541 | } | |
542 | ||
543 | static inline unsigned long pte_write(pte_t pte) | |
544 | { | |
cf627156 DM |
545 | unsigned long mask; |
546 | ||
cf627156 DM |
547 | __asm__ __volatile__( |
548 | "\n661: mov %1, %0\n" | |
549 | " nop\n" | |
550 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
551 | " .word 661b\n" | |
552 | " sethi %%uhi(%2), %0\n" | |
553 | " sllx %0, 32, %0\n" | |
554 | " .previous\n" | |
555 | : "=r" (mask) | |
50f4f23c | 556 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); |
cf627156 DM |
557 | |
558 | return (pte_val(pte) & mask); | |
559 | } | |
560 | ||
561 | static inline unsigned long pte_exec(pte_t pte) | |
562 | { | |
cf627156 DM |
563 | unsigned long mask; |
564 | ||
cf627156 DM |
565 | __asm__ __volatile__( |
566 | "\n661: sethi %%hi(%1), %0\n" | |
567 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
568 | " .word 661b\n" | |
569 | " mov %2, %0\n" | |
570 | " .previous\n" | |
571 | : "=r" (mask) | |
50f4f23c | 572 | : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V)); |
cf627156 DM |
573 | |
574 | return (pte_val(pte) & mask); | |
575 | } | |
576 | ||
577 | static inline unsigned long pte_read(pte_t pte) | |
578 | { | |
cf627156 DM |
579 | unsigned long mask; |
580 | ||
cf627156 DM |
581 | __asm__ __volatile__( |
582 | "\n661: mov %1, %0\n" | |
583 | " nop\n" | |
584 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
585 | " .word 661b\n" | |
586 | " sethi %%uhi(%2), %0\n" | |
587 | " sllx %0, 32, %0\n" | |
588 | " .previous\n" | |
589 | : "=r" (mask) | |
50f4f23c | 590 | : "i" (_PAGE_READ_4U), "i" (_PAGE_READ_4V)); |
cf627156 DM |
591 | |
592 | return (pte_val(pte) & mask); | |
593 | } | |
594 | ||
595 | static inline unsigned long pte_file(pte_t pte) | |
596 | { | |
cf627156 DM |
597 | unsigned long val = pte_val(pte); |
598 | ||
cf627156 DM |
599 | __asm__ __volatile__( |
600 | "\n661: and %0, %2, %0\n" | |
601 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
602 | " .word 661b\n" | |
603 | " and %0, %3, %0\n" | |
604 | " .previous\n" | |
605 | : "=r" (val) | |
50f4f23c | 606 | : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V)); |
cf627156 DM |
607 | |
608 | return val; | |
609 | } | |
610 | ||
611 | static inline unsigned long pte_present(pte_t pte) | |
612 | { | |
cf627156 DM |
613 | unsigned long val = pte_val(pte); |
614 | ||
cf627156 DM |
615 | __asm__ __volatile__( |
616 | "\n661: and %0, %2, %0\n" | |
617 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
618 | " .word 661b\n" | |
619 | " and %0, %3, %0\n" | |
620 | " .previous\n" | |
621 | : "=r" (val) | |
50f4f23c | 622 | : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V)); |
cf627156 DM |
623 | |
624 | return val; | |
625 | } | |
1da177e4 | 626 | |
1da177e4 LT |
627 | #define pmd_set(pmdp, ptep) \ |
628 | (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL)) | |
629 | #define pud_set(pudp, pmdp) \ | |
630 | (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL)) | |
631 | #define __pmd_page(pmd) \ | |
632 | ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL))) | |
633 | #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) | |
634 | #define pud_page(pud) \ | |
635 | ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL))) | |
1da177e4 LT |
636 | #define pmd_none(pmd) (!pmd_val(pmd)) |
637 | #define pmd_bad(pmd) (0) | |
638 | #define pmd_present(pmd) (pmd_val(pmd) != 0U) | |
639 | #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U) | |
640 | #define pud_none(pud) (!pud_val(pud)) | |
641 | #define pud_bad(pud) (0) | |
642 | #define pud_present(pud) (pud_val(pud) != 0U) | |
643 | #define pud_clear(pudp) (pud_val(*(pudp)) = 0U) | |
644 | ||
c4bce90e DM |
645 | /* Same in both SUN4V and SUN4U. */ |
646 | #define pte_none(pte) (!pte_val(pte)) | |
647 | ||
1da177e4 LT |
648 | /* to find an entry in a page-table-directory. */ |
649 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
650 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | |
651 | ||
652 | /* to find an entry in a kernel page-table-directory */ | |
653 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
654 | ||
1da177e4 LT |
655 | /* Find an entry in the second-level page table.. */ |
656 | #define pmd_offset(pudp, address) \ | |
657 | ((pmd_t *) pud_page(*(pudp)) + \ | |
658 | (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))) | |
659 | ||
660 | /* Find an entry in the third-level page table.. */ | |
661 | #define pte_index(dir, address) \ | |
662 | ((pte_t *) __pmd_page(*(dir)) + \ | |
663 | ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) | |
664 | #define pte_offset_kernel pte_index | |
665 | #define pte_offset_map pte_index | |
666 | #define pte_offset_map_nested pte_index | |
667 | #define pte_unmap(pte) do { } while (0) | |
668 | #define pte_unmap_nested(pte) do { } while (0) | |
669 | ||
670 | /* Actual page table PTE updates. */ | |
671 | extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig); | |
672 | ||
673 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) | |
674 | { | |
675 | pte_t orig = *ptep; | |
676 | ||
677 | *ptep = pte; | |
678 | ||
679 | /* It is more efficient to let flush_tlb_kernel_range() | |
680 | * handle init_mm tlb flushes. | |
c4bce90e DM |
681 | * |
682 | * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U | |
683 | * and SUN4V pte layout, so this inline test is fine. | |
1da177e4 LT |
684 | */ |
685 | if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID)) | |
686 | tlb_batch_add(mm, addr, ptep, orig); | |
687 | } | |
688 | ||
689 | #define pte_clear(mm,addr,ptep) \ | |
690 | set_pte_at((mm), (addr), (ptep), __pte(0UL)) | |
691 | ||
56425306 DM |
692 | extern pgd_t swapper_pg_dir[2048]; |
693 | extern pmd_t swapper_low_pmd_dir[2048]; | |
1da177e4 | 694 | |
801ab3c7 | 695 | extern void paging_init(void); |
10147570 | 696 | extern unsigned long find_ecache_flush_span(unsigned long size); |
801ab3c7 | 697 | |
1da177e4 LT |
698 | /* These do nothing with the way I have things setup. */ |
699 | #define mmu_lockarea(vaddr, len) (vaddr) | |
700 | #define mmu_unlockarea(vaddr, len) do { } while(0) | |
701 | ||
702 | struct vm_area_struct; | |
703 | extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t); | |
704 | ||
1da177e4 LT |
705 | /* Encode and de-code a swap entry */ |
706 | #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) | |
707 | #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL)) | |
708 | #define __swp_entry(type, offset) \ | |
709 | ( (swp_entry_t) \ | |
710 | { \ | |
711 | (((long)(type) << PAGE_SHIFT) | \ | |
712 | ((long)(offset) << (PAGE_SHIFT + 8UL))) \ | |
713 | } ) | |
714 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
715 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
716 | ||
717 | /* File offset in PTE support. */ | |
c4bce90e | 718 | extern unsigned long pte_file(pte_t); |
1da177e4 | 719 | #define pte_to_pgoff(pte) (pte_val(pte) >> PAGE_SHIFT) |
c4bce90e | 720 | extern pte_t pgoff_to_pte(unsigned long); |
1da177e4 LT |
721 | #define PTE_FILE_MAX_BITS (64UL - PAGE_SHIFT - 1UL) |
722 | ||
723 | extern unsigned long prom_virt_to_phys(unsigned long, int *); | |
724 | ||
c4bce90e | 725 | extern unsigned long sun4u_get_pte(unsigned long); |
1da177e4 | 726 | |
c4bce90e | 727 | static inline unsigned long __get_phys(unsigned long addr) |
1da177e4 | 728 | { |
c4bce90e | 729 | return sun4u_get_pte(addr); |
1da177e4 LT |
730 | } |
731 | ||
c4bce90e | 732 | static inline int __get_iospace(unsigned long addr) |
1da177e4 | 733 | { |
c4bce90e | 734 | return ((sun4u_get_pte(addr) & 0xf0000000) >> 28); |
1da177e4 LT |
735 | } |
736 | ||
737 | extern unsigned long *sparc64_valid_addr_bitmap; | |
738 | ||
739 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | |
740 | #define kern_addr_valid(addr) \ | |
741 | (test_bit(__pa((unsigned long)(addr))>>22, sparc64_valid_addr_bitmap)) | |
742 | ||
1da177e4 LT |
743 | extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, |
744 | unsigned long pfn, | |
745 | unsigned long size, pgprot_t prot); | |
746 | ||
747 | /* | |
748 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | |
749 | * its high 4 bits. These macros/functions put it there or get it from there. | |
750 | */ | |
751 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | |
752 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | |
753 | #define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL) | |
754 | ||
1da177e4 LT |
755 | #include <asm-generic/pgtable.h> |
756 | ||
a91690dd DM |
757 | /* We provide our own get_unmapped_area to cope with VA holes and |
758 | * SHM area cache aliasing for userland. | |
759 | */ | |
1da177e4 | 760 | #define HAVE_ARCH_UNMAPPED_AREA |
a91690dd | 761 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
1da177e4 LT |
762 | |
763 | /* We provide a special get_unmapped_area for framebuffer mmaps to try and use | |
764 | * the largest alignment possible such that larget PTEs can be used. | |
765 | */ | |
766 | extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long, | |
767 | unsigned long, unsigned long, | |
768 | unsigned long); | |
769 | #define HAVE_ARCH_FB_UNMAPPED_AREA | |
770 | ||
3c936465 | 771 | extern void pgtable_cache_init(void); |
481295f9 | 772 | extern void sun4v_register_fault_status(void); |
490384e7 | 773 | extern void sun4v_ktsb_register(void); |
1da177e4 LT |
774 | |
775 | #endif /* !(__ASSEMBLY__) */ | |
776 | ||
777 | #endif /* !(_SPARC64_PGTABLE_H) */ |