Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f5e706ad SR |
2 | /* |
3 | * pgtable.h: SpitFire page table operations. | |
4 | * | |
5 | * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu) | |
6 | * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
7 | */ | |
8 | ||
9 | #ifndef _SPARC64_PGTABLE_H | |
10 | #define _SPARC64_PGTABLE_H | |
11 | ||
12 | /* This file contains the functions and defines necessary to modify and use | |
13 | * the SpitFire page tables. | |
14 | */ | |
15 | ||
9849a569 | 16 | #include <asm-generic/5level-fixup.h> |
f5e706ad SR |
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> | |
74a04967 | 22 | #include <asm/adi.h> |
f5e706ad SR |
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. | |
b18eb2d7 DM |
28 | * The 8K TSB is mapped in the 0x8000000 to 0x8400000 range. |
29 | * The 4M TSB is mapped in the 0x8400000 to 0x8800000 range. | |
f5e706ad SR |
30 | * The PROM resides in an area spanning 0xf0000000 to 0x100000000. |
31 | * The vmalloc area spans 0x100000000 to 0x200000000. | |
32 | * Since modules need to be in the lowest 32-bits of the address space, | |
33 | * we place them right before the OBP area from 0x10000000 to 0xf0000000. | |
34 | * There is a single static kernel PMD which maps from 0x0 to address | |
35 | * 0x400000000. | |
36 | */ | |
37 | #define TLBTEMP_BASE _AC(0x0000000006000000,UL) | |
b18eb2d7 DM |
38 | #define TSBMAP_8K_BASE _AC(0x0000000008000000,UL) |
39 | #define TSBMAP_4M_BASE _AC(0x0000000008400000,UL) | |
f5e706ad SR |
40 | #define MODULES_VADDR _AC(0x0000000010000000,UL) |
41 | #define MODULES_LEN _AC(0x00000000e0000000,UL) | |
42 | #define MODULES_END _AC(0x00000000f0000000,UL) | |
43 | #define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL) | |
44 | #define HI_OBP_ADDRESS _AC(0x0000000100000000,UL) | |
45 | #define VMALLOC_START _AC(0x0000000100000000,UL) | |
bb4e6e85 | 46 | #define VMEMMAP_BASE VMALLOC_END |
f5e706ad | 47 | |
f5e706ad SR |
48 | /* PMD_SHIFT determines the size of the area a second-level page |
49 | * table can map | |
50 | */ | |
37b3a8ff | 51 | #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) |
f5e706ad SR |
52 | #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) |
53 | #define PMD_MASK (~(PMD_SIZE-1)) | |
2b77933c | 54 | #define PMD_BITS (PAGE_SHIFT - 3) |
f5e706ad | 55 | |
ac55c768 DM |
56 | /* PUD_SHIFT determines the size of the area a third-level page |
57 | * table can map | |
58 | */ | |
59 | #define PUD_SHIFT (PMD_SHIFT + PMD_BITS) | |
60 | #define PUD_SIZE (_AC(1,UL) << PUD_SHIFT) | |
61 | #define PUD_MASK (~(PUD_SIZE-1)) | |
62 | #define PUD_BITS (PAGE_SHIFT - 3) | |
63 | ||
64 | /* PGDIR_SHIFT determines what a fourth-level page table entry can map */ | |
65 | #define PGDIR_SHIFT (PUD_SHIFT + PUD_BITS) | |
f5e706ad SR |
66 | #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) |
67 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) | |
2b77933c | 68 | #define PGDIR_BITS (PAGE_SHIFT - 3) |
f5e706ad | 69 | |
7c0fa0f2 DM |
70 | #if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS) |
71 | #error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support | |
72 | #endif | |
73 | ||
ac55c768 | 74 | #if (PGDIR_SHIFT + PGDIR_BITS) != 53 |
56a70b8c DM |
75 | #error Page table parameters do not cover virtual address space properly. |
76 | #endif | |
77 | ||
9e695d2e DM |
78 | #if (PMD_SHIFT != HPAGE_SHIFT) |
79 | #error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages. | |
80 | #endif | |
81 | ||
f5e706ad SR |
82 | #ifndef __ASSEMBLY__ |
83 | ||
bb4e6e85 DM |
84 | extern unsigned long VMALLOC_END; |
85 | ||
86 | #define vmemmap ((struct page *)VMEMMAP_BASE) | |
87 | ||
f5e706ad SR |
88 | #include <linux/sched.h> |
89 | ||
0dd5b7b0 | 90 | bool kern_addr_valid(unsigned long addr); |
26cf4325 | 91 | |
f5e706ad | 92 | /* Entries per page directory level. */ |
37b3a8ff | 93 | #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3)) |
f5e706ad | 94 | #define PTRS_PER_PMD (1UL << PMD_BITS) |
ac55c768 | 95 | #define PTRS_PER_PUD (1UL << PUD_BITS) |
f5e706ad SR |
96 | #define PTRS_PER_PGD (1UL << PGDIR_BITS) |
97 | ||
98 | /* Kernel has a separate 44bit address space. */ | |
d016bf7e | 99 | #define FIRST_USER_ADDRESS 0UL |
f5e706ad | 100 | |
fe866433 DM |
101 | #define pmd_ERROR(e) \ |
102 | pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n", \ | |
103 | __FILE__, __LINE__, &(e), pmd_val(e), __builtin_return_address(0)) | |
ac55c768 DM |
104 | #define pud_ERROR(e) \ |
105 | pr_err("%s:%d: bad pud %p(%016lx) seen at (%pS)\n", \ | |
106 | __FILE__, __LINE__, &(e), pud_val(e), __builtin_return_address(0)) | |
fe866433 DM |
107 | #define pgd_ERROR(e) \ |
108 | pr_err("%s:%d: bad pgd %p(%016lx) seen at (%pS)\n", \ | |
109 | __FILE__, __LINE__, &(e), pgd_val(e), __builtin_return_address(0)) | |
f5e706ad SR |
110 | |
111 | #endif /* !(__ASSEMBLY__) */ | |
112 | ||
113 | /* PTE bits which are the same in SUN4U and SUN4V format. */ | |
114 | #define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */ | |
115 | #define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/ | |
683d2fa6 | 116 | #define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */ |
a7b9403f | 117 | #define _PAGE_PMD_HUGE _AC(0x0100000000000000,UL) /* Huge page */ |
0dd5b7b0 | 118 | #define _PAGE_PUD_HUGE _PAGE_PMD_HUGE |
683d2fa6 | 119 | |
f5e706ad SR |
120 | /* SUN4U pte bits... */ |
121 | #define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */ | |
122 | #define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */ | |
123 | #define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */ | |
124 | #define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */ | |
125 | #define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */ | |
126 | #define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */ | |
127 | #define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */ | |
683d2fa6 | 128 | #define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */ |
a7b9403f | 129 | #define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page */ |
f5e706ad SR |
130 | #define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */ |
131 | #define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */ | |
132 | #define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */ | |
133 | #define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */ | |
134 | #define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */ | |
135 | #define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */ | |
136 | #define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */ | |
137 | #define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */ | |
138 | #define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */ | |
139 | #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */ | |
f5e706ad SR |
140 | #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */ |
141 | #define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */ | |
142 | #define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */ | |
143 | #define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */ | |
144 | #define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */ | |
145 | #define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */ | |
146 | #define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */ | |
147 | #define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */ | |
148 | #define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */ | |
149 | #define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */ | |
150 | ||
151 | /* SUN4V pte bits... */ | |
152 | #define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */ | |
153 | #define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */ | |
154 | #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */ | |
155 | #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */ | |
156 | #define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */ | |
157 | #define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */ | |
683d2fa6 | 158 | #define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */ |
a7b9403f | 159 | #define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page */ |
f5e706ad SR |
160 | #define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */ |
161 | #define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */ | |
162 | #define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */ | |
163 | #define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */ | |
164 | #define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */ | |
75037500 KA |
165 | /* Bit 9 is used to enable MCD corruption detection instead on M7 */ |
166 | #define _PAGE_MCD_4V _AC(0x0000000000000200,UL) /* Memory Corruption */ | |
f5e706ad SR |
167 | #define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */ |
168 | #define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */ | |
169 | #define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */ | |
170 | #define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */ | |
f5e706ad SR |
171 | #define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */ |
172 | #define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */ | |
173 | #define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */ | |
174 | #define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */ | |
175 | #define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */ | |
176 | #define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */ | |
177 | #define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */ | |
178 | #define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */ | |
179 | #define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */ | |
180 | #define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */ | |
181 | #define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */ | |
182 | ||
f5e706ad SR |
183 | #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U |
184 | #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V | |
15b9350a | 185 | |
37b3a8ff DM |
186 | #if REAL_HPAGE_SHIFT != 22 |
187 | #error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up | |
188 | #endif | |
189 | ||
f5e706ad SR |
190 | #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U |
191 | #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V | |
f5e706ad SR |
192 | |
193 | /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */ | |
194 | #define __P000 __pgprot(0) | |
195 | #define __P001 __pgprot(0) | |
196 | #define __P010 __pgprot(0) | |
197 | #define __P011 __pgprot(0) | |
198 | #define __P100 __pgprot(0) | |
199 | #define __P101 __pgprot(0) | |
200 | #define __P110 __pgprot(0) | |
201 | #define __P111 __pgprot(0) | |
202 | ||
203 | #define __S000 __pgprot(0) | |
204 | #define __S001 __pgprot(0) | |
205 | #define __S010 __pgprot(0) | |
206 | #define __S011 __pgprot(0) | |
207 | #define __S100 __pgprot(0) | |
208 | #define __S101 __pgprot(0) | |
209 | #define __S110 __pgprot(0) | |
210 | #define __S111 __pgprot(0) | |
211 | ||
212 | #ifndef __ASSEMBLY__ | |
213 | ||
f05a6865 | 214 | pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long); |
f5e706ad | 215 | |
f05a6865 | 216 | unsigned long pte_sz_bits(unsigned long size); |
f5e706ad SR |
217 | |
218 | extern pgprot_t PAGE_KERNEL; | |
219 | extern pgprot_t PAGE_KERNEL_LOCKED; | |
220 | extern pgprot_t PAGE_COPY; | |
221 | extern pgprot_t PAGE_SHARED; | |
222 | ||
08f80073 | 223 | /* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */ |
f5e706ad SR |
224 | extern unsigned long _PAGE_IE; |
225 | extern unsigned long _PAGE_E; | |
226 | extern unsigned long _PAGE_CACHE; | |
227 | ||
228 | extern unsigned long pg_iobits; | |
229 | extern unsigned long _PAGE_ALL_SZ_BITS; | |
f5e706ad SR |
230 | |
231 | extern struct page *mem_map_zero; | |
232 | #define ZERO_PAGE(vaddr) (mem_map_zero) | |
233 | ||
234 | /* PFNs are real physical page numbers. However, mem_map only begins to record | |
235 | * per-page information starting at pfn_base. This is to handle systems where | |
236 | * the first physical page in the machine is at some huge physical address, | |
237 | * such as 4GB. This is common on a partitioned E10000, for example. | |
238 | */ | |
239 | static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot) | |
240 | { | |
241 | unsigned long paddr = pfn << PAGE_SHIFT; | |
15b9350a DM |
242 | |
243 | BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL); | |
244 | return __pte(paddr | pgprot_val(prot)); | |
f5e706ad SR |
245 | } |
246 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
247 | ||
9e695d2e | 248 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
a7b9403f | 249 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
9e695d2e | 250 | { |
a7b9403f DM |
251 | pte_t pte = pfn_pte(page_nr, pgprot); |
252 | ||
253 | return __pmd(pte_val(pte)); | |
9e695d2e | 254 | } |
a7b9403f | 255 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
9e695d2e DM |
256 | #endif |
257 | ||
f5e706ad SR |
258 | /* This one can be done with two shifts. */ |
259 | static inline unsigned long pte_pfn(pte_t pte) | |
260 | { | |
261 | unsigned long ret; | |
262 | ||
263 | __asm__ __volatile__( | |
264 | "\n661: sllx %1, %2, %0\n" | |
265 | " srlx %0, %3, %0\n" | |
266 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
267 | " .word 661b\n" | |
268 | " sllx %1, %4, %0\n" | |
269 | " srlx %0, %5, %0\n" | |
270 | " .previous\n" | |
271 | : "=r" (ret) | |
272 | : "r" (pte_val(pte)), | |
273 | "i" (21), "i" (21 + PAGE_SHIFT), | |
274 | "i" (8), "i" (8 + PAGE_SHIFT)); | |
275 | ||
276 | return ret; | |
277 | } | |
278 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
279 | ||
280 | static inline pte_t pte_modify(pte_t pte, pgprot_t prot) | |
281 | { | |
282 | unsigned long mask, tmp; | |
283 | ||
eaf85da8 DM |
284 | /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7) |
285 | * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8) | |
f5e706ad SR |
286 | * |
287 | * Even if we use negation tricks the result is still a 6 | |
288 | * instruction sequence, so don't try to play fancy and just | |
289 | * do the most straightforward implementation. | |
290 | * | |
291 | * Note: We encode this into 3 sun4v 2-insn patch sequences. | |
292 | */ | |
293 | ||
15b9350a | 294 | BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL); |
f5e706ad SR |
295 | __asm__ __volatile__( |
296 | "\n661: sethi %%uhi(%2), %1\n" | |
297 | " sethi %%hi(%2), %0\n" | |
298 | "\n662: or %1, %%ulo(%2), %1\n" | |
299 | " or %0, %%lo(%2), %0\n" | |
300 | "\n663: sllx %1, 32, %1\n" | |
301 | " or %0, %1, %0\n" | |
302 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
303 | " .word 661b\n" | |
304 | " sethi %%uhi(%3), %1\n" | |
305 | " sethi %%hi(%3), %0\n" | |
306 | " .word 662b\n" | |
307 | " or %1, %%ulo(%3), %1\n" | |
308 | " or %0, %%lo(%3), %0\n" | |
309 | " .word 663b\n" | |
310 | " sllx %1, 32, %1\n" | |
311 | " or %0, %1, %0\n" | |
312 | " .previous\n" | |
494e5b6f KA |
313 | " .section .sun_m7_2insn_patch, \"ax\"\n" |
314 | " .word 661b\n" | |
315 | " sethi %%uhi(%4), %1\n" | |
316 | " sethi %%hi(%4), %0\n" | |
317 | " .word 662b\n" | |
318 | " or %1, %%ulo(%4), %1\n" | |
319 | " or %0, %%lo(%4), %0\n" | |
320 | " .word 663b\n" | |
321 | " sllx %1, 32, %1\n" | |
322 | " or %0, %1, %0\n" | |
323 | " .previous\n" | |
f5e706ad SR |
324 | : "=r" (mask), "=r" (tmp) |
325 | : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U | | |
eaf85da8 | 326 | _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | |
a7b9403f | 327 | _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U), |
f5e706ad | 328 | "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | |
eaf85da8 | 329 | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | |
494e5b6f KA |
330 | _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V), |
331 | "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | | |
332 | _PAGE_CP_4V | _PAGE_E_4V | | |
a7b9403f | 333 | _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V)); |
f5e706ad SR |
334 | |
335 | return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask)); | |
336 | } | |
337 | ||
a7b9403f DM |
338 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
339 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) | |
340 | { | |
341 | pte_t pte = __pte(pmd_val(pmd)); | |
342 | ||
343 | pte = pte_modify(pte, newprot); | |
344 | ||
345 | return __pmd(pte_val(pte)); | |
346 | } | |
347 | #endif | |
348 | ||
f5e706ad SR |
349 | static inline pgprot_t pgprot_noncached(pgprot_t prot) |
350 | { | |
351 | unsigned long val = pgprot_val(prot); | |
352 | ||
353 | __asm__ __volatile__( | |
354 | "\n661: andn %0, %2, %0\n" | |
355 | " or %0, %3, %0\n" | |
356 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
357 | " .word 661b\n" | |
358 | " andn %0, %4, %0\n" | |
359 | " or %0, %5, %0\n" | |
360 | " .previous\n" | |
494e5b6f KA |
361 | " .section .sun_m7_2insn_patch, \"ax\"\n" |
362 | " .word 661b\n" | |
363 | " andn %0, %6, %0\n" | |
364 | " or %0, %5, %0\n" | |
365 | " .previous\n" | |
f5e706ad SR |
366 | : "=r" (val) |
367 | : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U), | |
494e5b6f KA |
368 | "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V), |
369 | "i" (_PAGE_CP_4V)); | |
f5e706ad SR |
370 | |
371 | return __pgprot(val); | |
372 | } | |
373 | /* Various pieces of code check for platform support by ifdef testing | |
374 | * on "pgprot_noncached". That's broken and should be fixed, but for | |
375 | * now... | |
376 | */ | |
377 | #define pgprot_noncached pgprot_noncached | |
378 | ||
a7b9403f | 379 | #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) |
c7d9f77d NG |
380 | extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, |
381 | struct page *page, int writable); | |
382 | #define arch_make_huge_pte arch_make_huge_pte | |
383 | static inline unsigned long __pte_default_huge_mask(void) | |
f5e706ad SR |
384 | { |
385 | unsigned long mask; | |
386 | ||
387 | __asm__ __volatile__( | |
388 | "\n661: sethi %%uhi(%1), %0\n" | |
389 | " sllx %0, 32, %0\n" | |
390 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
391 | " .word 661b\n" | |
392 | " mov %2, %0\n" | |
393 | " nop\n" | |
394 | " .previous\n" | |
395 | : "=r" (mask) | |
396 | : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V)); | |
397 | ||
24e49ee3 NG |
398 | return mask; |
399 | } | |
400 | ||
401 | static inline pte_t pte_mkhuge(pte_t pte) | |
402 | { | |
c7d9f77d | 403 | return __pte(pte_val(pte) | __pte_default_huge_mask()); |
24e49ee3 NG |
404 | } |
405 | ||
c7d9f77d | 406 | static inline bool is_default_hugetlb_pte(pte_t pte) |
24e49ee3 | 407 | { |
c7d9f77d NG |
408 | unsigned long mask = __pte_default_huge_mask(); |
409 | ||
410 | return (pte_val(pte) & mask) == mask; | |
f5e706ad | 411 | } |
24e49ee3 | 412 | |
7bc3777c NG |
413 | static inline bool is_hugetlb_pmd(pmd_t pmd) |
414 | { | |
415 | return !!(pmd_val(pmd) & _PAGE_PMD_HUGE); | |
416 | } | |
417 | ||
df7b2155 NG |
418 | static inline bool is_hugetlb_pud(pud_t pud) |
419 | { | |
420 | return !!(pud_val(pud) & _PAGE_PUD_HUGE); | |
421 | } | |
422 | ||
a7b9403f DM |
423 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
424 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
425 | { | |
426 | pte_t pte = __pte(pmd_val(pmd)); | |
427 | ||
428 | pte = pte_mkhuge(pte); | |
429 | pte_val(pte) |= _PAGE_PMD_HUGE; | |
430 | ||
431 | return __pmd(pte_val(pte)); | |
432 | } | |
433 | #endif | |
24e49ee3 NG |
434 | #else |
435 | static inline bool is_hugetlb_pte(pte_t pte) | |
436 | { | |
437 | return false; | |
438 | } | |
f5e706ad SR |
439 | #endif |
440 | ||
441 | static inline pte_t pte_mkdirty(pte_t pte) | |
442 | { | |
443 | unsigned long val = pte_val(pte), tmp; | |
444 | ||
445 | __asm__ __volatile__( | |
446 | "\n661: or %0, %3, %0\n" | |
447 | " nop\n" | |
448 | "\n662: nop\n" | |
449 | " nop\n" | |
450 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
451 | " .word 661b\n" | |
452 | " sethi %%uhi(%4), %1\n" | |
453 | " sllx %1, 32, %1\n" | |
454 | " .word 662b\n" | |
455 | " or %1, %%lo(%4), %1\n" | |
456 | " or %0, %1, %0\n" | |
457 | " .previous\n" | |
458 | : "=r" (val), "=r" (tmp) | |
459 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), | |
460 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
461 | ||
462 | return __pte(val); | |
463 | } | |
464 | ||
465 | static inline pte_t pte_mkclean(pte_t pte) | |
466 | { | |
467 | unsigned long val = pte_val(pte), tmp; | |
468 | ||
469 | __asm__ __volatile__( | |
470 | "\n661: andn %0, %3, %0\n" | |
471 | " nop\n" | |
472 | "\n662: nop\n" | |
473 | " nop\n" | |
474 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
475 | " .word 661b\n" | |
476 | " sethi %%uhi(%4), %1\n" | |
477 | " sllx %1, 32, %1\n" | |
478 | " .word 662b\n" | |
479 | " or %1, %%lo(%4), %1\n" | |
480 | " andn %0, %1, %0\n" | |
481 | " .previous\n" | |
482 | : "=r" (val), "=r" (tmp) | |
483 | : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), | |
484 | "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); | |
485 | ||
486 | return __pte(val); | |
487 | } | |
488 | ||
489 | static inline pte_t pte_mkwrite(pte_t pte) | |
490 | { | |
491 | unsigned long val = pte_val(pte), mask; | |
492 | ||
493 | __asm__ __volatile__( | |
494 | "\n661: mov %1, %0\n" | |
495 | " nop\n" | |
496 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
497 | " .word 661b\n" | |
498 | " sethi %%uhi(%2), %0\n" | |
499 | " sllx %0, 32, %0\n" | |
500 | " .previous\n" | |
501 | : "=r" (mask) | |
502 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); | |
503 | ||
504 | return __pte(val | mask); | |
505 | } | |
506 | ||
507 | static inline pte_t pte_wrprotect(pte_t pte) | |
508 | { | |
509 | unsigned long val = pte_val(pte), tmp; | |
510 | ||
511 | __asm__ __volatile__( | |
512 | "\n661: andn %0, %3, %0\n" | |
513 | " nop\n" | |
514 | "\n662: nop\n" | |
515 | " nop\n" | |
516 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
517 | " .word 661b\n" | |
518 | " sethi %%uhi(%4), %1\n" | |
519 | " sllx %1, 32, %1\n" | |
520 | " .word 662b\n" | |
521 | " or %1, %%lo(%4), %1\n" | |
522 | " andn %0, %1, %0\n" | |
523 | " .previous\n" | |
524 | : "=r" (val), "=r" (tmp) | |
525 | : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U), | |
526 | "i" (_PAGE_WRITE_4V | _PAGE_W_4V)); | |
527 | ||
528 | return __pte(val); | |
529 | } | |
530 | ||
531 | static inline pte_t pte_mkold(pte_t pte) | |
532 | { | |
533 | unsigned long mask; | |
534 | ||
535 | __asm__ __volatile__( | |
536 | "\n661: mov %1, %0\n" | |
537 | " nop\n" | |
538 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
539 | " .word 661b\n" | |
540 | " sethi %%uhi(%2), %0\n" | |
541 | " sllx %0, 32, %0\n" | |
542 | " .previous\n" | |
543 | : "=r" (mask) | |
544 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
545 | ||
546 | mask |= _PAGE_R; | |
547 | ||
548 | return __pte(pte_val(pte) & ~mask); | |
549 | } | |
550 | ||
551 | static inline pte_t pte_mkyoung(pte_t pte) | |
552 | { | |
553 | unsigned long mask; | |
554 | ||
555 | __asm__ __volatile__( | |
556 | "\n661: mov %1, %0\n" | |
557 | " nop\n" | |
558 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
559 | " .word 661b\n" | |
560 | " sethi %%uhi(%2), %0\n" | |
561 | " sllx %0, 32, %0\n" | |
562 | " .previous\n" | |
563 | : "=r" (mask) | |
564 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
565 | ||
566 | mask |= _PAGE_R; | |
567 | ||
568 | return __pte(pte_val(pte) | mask); | |
569 | } | |
570 | ||
571 | static inline pte_t pte_mkspecial(pte_t pte) | |
572 | { | |
683d2fa6 | 573 | pte_val(pte) |= _PAGE_SPECIAL; |
f5e706ad SR |
574 | return pte; |
575 | } | |
576 | ||
74a04967 KA |
577 | static inline pte_t pte_mkmcd(pte_t pte) |
578 | { | |
579 | pte_val(pte) |= _PAGE_MCD_4V; | |
580 | return pte; | |
581 | } | |
582 | ||
583 | static inline pte_t pte_mknotmcd(pte_t pte) | |
584 | { | |
585 | pte_val(pte) &= ~_PAGE_MCD_4V; | |
586 | return pte; | |
587 | } | |
588 | ||
f5e706ad SR |
589 | static inline unsigned long pte_young(pte_t pte) |
590 | { | |
591 | unsigned long mask; | |
592 | ||
593 | __asm__ __volatile__( | |
594 | "\n661: mov %1, %0\n" | |
595 | " nop\n" | |
596 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
597 | " .word 661b\n" | |
598 | " sethi %%uhi(%2), %0\n" | |
599 | " sllx %0, 32, %0\n" | |
600 | " .previous\n" | |
601 | : "=r" (mask) | |
602 | : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); | |
603 | ||
604 | return (pte_val(pte) & mask); | |
605 | } | |
606 | ||
607 | static inline unsigned long pte_dirty(pte_t pte) | |
608 | { | |
609 | unsigned long mask; | |
610 | ||
611 | __asm__ __volatile__( | |
612 | "\n661: mov %1, %0\n" | |
613 | " nop\n" | |
614 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
615 | " .word 661b\n" | |
616 | " sethi %%uhi(%2), %0\n" | |
617 | " sllx %0, 32, %0\n" | |
618 | " .previous\n" | |
619 | : "=r" (mask) | |
620 | : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V)); | |
621 | ||
622 | return (pte_val(pte) & mask); | |
623 | } | |
624 | ||
625 | static inline unsigned long pte_write(pte_t pte) | |
626 | { | |
627 | unsigned long mask; | |
628 | ||
629 | __asm__ __volatile__( | |
630 | "\n661: mov %1, %0\n" | |
631 | " nop\n" | |
632 | " .section .sun4v_2insn_patch, \"ax\"\n" | |
633 | " .word 661b\n" | |
634 | " sethi %%uhi(%2), %0\n" | |
635 | " sllx %0, 32, %0\n" | |
636 | " .previous\n" | |
637 | : "=r" (mask) | |
638 | : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); | |
639 | ||
640 | return (pte_val(pte) & mask); | |
641 | } | |
642 | ||
643 | static inline unsigned long pte_exec(pte_t pte) | |
644 | { | |
645 | unsigned long mask; | |
646 | ||
647 | __asm__ __volatile__( | |
648 | "\n661: sethi %%hi(%1), %0\n" | |
649 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
650 | " .word 661b\n" | |
651 | " mov %2, %0\n" | |
652 | " .previous\n" | |
653 | : "=r" (mask) | |
654 | : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V)); | |
655 | ||
656 | return (pte_val(pte) & mask); | |
657 | } | |
658 | ||
f5e706ad SR |
659 | static inline unsigned long pte_present(pte_t pte) |
660 | { | |
661 | unsigned long val = pte_val(pte); | |
662 | ||
663 | __asm__ __volatile__( | |
664 | "\n661: and %0, %2, %0\n" | |
665 | " .section .sun4v_1insn_patch, \"ax\"\n" | |
666 | " .word 661b\n" | |
667 | " and %0, %3, %0\n" | |
668 | " .previous\n" | |
669 | : "=r" (val) | |
670 | : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V)); | |
671 | ||
672 | return val; | |
673 | } | |
674 | ||
4a9d1946 | 675 | #define pte_accessible pte_accessible |
20841405 | 676 | static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a) |
4a9d1946 DM |
677 | { |
678 | return pte_val(a) & _PAGE_VALID; | |
679 | } | |
680 | ||
683d2fa6 | 681 | static inline unsigned long pte_special(pte_t pte) |
f5e706ad | 682 | { |
683d2fa6 | 683 | return pte_val(pte) & _PAGE_SPECIAL; |
f5e706ad SR |
684 | } |
685 | ||
a7b9403f | 686 | static inline unsigned long pmd_large(pmd_t pmd) |
89a77915 | 687 | { |
a7b9403f DM |
688 | pte_t pte = __pte(pmd_val(pmd)); |
689 | ||
04df419d | 690 | return pte_val(pte) & _PAGE_PMD_HUGE; |
89a77915 DM |
691 | } |
692 | ||
0dd5b7b0 | 693 | static inline unsigned long pmd_pfn(pmd_t pmd) |
9e695d2e | 694 | { |
a7b9403f DM |
695 | pte_t pte = __pte(pmd_val(pmd)); |
696 | ||
0dd5b7b0 | 697 | return pte_pfn(pte); |
9e695d2e DM |
698 | } |
699 | ||
e4e40e02 | 700 | #define pmd_write pmd_write |
9ae34dbd | 701 | static inline unsigned long pmd_write(pmd_t pmd) |
c164e038 KS |
702 | { |
703 | pte_t pte = __pte(pmd_val(pmd)); | |
704 | ||
9ae34dbd | 705 | return pte_write(pte); |
c164e038 KS |
706 | } |
707 | ||
44382b01 NG |
708 | #define pud_write(pud) pte_write(__pte(pud_val(pud))) |
709 | ||
9ae34dbd TH |
710 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
711 | static inline unsigned long pmd_dirty(pmd_t pmd) | |
9e695d2e | 712 | { |
a7b9403f DM |
713 | pte_t pte = __pte(pmd_val(pmd)); |
714 | ||
9ae34dbd | 715 | return pte_dirty(pte); |
9e695d2e DM |
716 | } |
717 | ||
9ae34dbd | 718 | static inline unsigned long pmd_young(pmd_t pmd) |
9e695d2e | 719 | { |
a7b9403f | 720 | pte_t pte = __pte(pmd_val(pmd)); |
9e695d2e | 721 | |
9ae34dbd | 722 | return pte_young(pte); |
9e695d2e DM |
723 | } |
724 | ||
a7b9403f | 725 | static inline unsigned long pmd_trans_huge(pmd_t pmd) |
9e695d2e | 726 | { |
a7b9403f DM |
727 | pte_t pte = __pte(pmd_val(pmd)); |
728 | ||
729 | return pte_val(pte) & _PAGE_PMD_HUGE; | |
9e695d2e DM |
730 | } |
731 | ||
9e695d2e DM |
732 | static inline pmd_t pmd_mkold(pmd_t pmd) |
733 | { | |
a7b9403f DM |
734 | pte_t pte = __pte(pmd_val(pmd)); |
735 | ||
736 | pte = pte_mkold(pte); | |
737 | ||
738 | return __pmd(pte_val(pte)); | |
9e695d2e DM |
739 | } |
740 | ||
741 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
742 | { | |
a7b9403f DM |
743 | pte_t pte = __pte(pmd_val(pmd)); |
744 | ||
745 | pte = pte_wrprotect(pte); | |
746 | ||
747 | return __pmd(pte_val(pte)); | |
9e695d2e DM |
748 | } |
749 | ||
750 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
751 | { | |
a7b9403f DM |
752 | pte_t pte = __pte(pmd_val(pmd)); |
753 | ||
754 | pte = pte_mkdirty(pte); | |
755 | ||
756 | return __pmd(pte_val(pte)); | |
9e695d2e DM |
757 | } |
758 | ||
79cedb8f MK |
759 | static inline pmd_t pmd_mkclean(pmd_t pmd) |
760 | { | |
761 | pte_t pte = __pte(pmd_val(pmd)); | |
762 | ||
763 | pte = pte_mkclean(pte); | |
764 | ||
765 | return __pmd(pte_val(pte)); | |
766 | } | |
767 | ||
9e695d2e DM |
768 | static inline pmd_t pmd_mkyoung(pmd_t pmd) |
769 | { | |
a7b9403f DM |
770 | pte_t pte = __pte(pmd_val(pmd)); |
771 | ||
772 | pte = pte_mkyoung(pte); | |
773 | ||
774 | return __pmd(pte_val(pte)); | |
9e695d2e DM |
775 | } |
776 | ||
777 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
778 | { | |
a7b9403f DM |
779 | pte_t pte = __pte(pmd_val(pmd)); |
780 | ||
781 | pte = pte_mkwrite(pte); | |
782 | ||
a7b9403f | 783 | return __pmd(pte_val(pte)); |
9e695d2e DM |
784 | } |
785 | ||
a7b9403f DM |
786 | static inline pgprot_t pmd_pgprot(pmd_t entry) |
787 | { | |
788 | unsigned long val = pmd_val(entry); | |
789 | ||
790 | return __pgprot(val); | |
791 | } | |
9e695d2e DM |
792 | #endif |
793 | ||
794 | static inline int pmd_present(pmd_t pmd) | |
795 | { | |
2b77933c | 796 | return pmd_val(pmd) != 0UL; |
9e695d2e DM |
797 | } |
798 | ||
799 | #define pmd_none(pmd) (!pmd_val(pmd)) | |
800 | ||
26cf4325 DM |
801 | /* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is |
802 | * very simple, it's just the physical address. PTE tables are of | |
803 | * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and | |
804 | * the top bits outside of the range of any physical address size we | |
805 | * support are clear as well. We also validate the physical itself. | |
806 | */ | |
0dd5b7b0 | 807 | #define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK) |
26cf4325 DM |
808 | |
809 | #define pud_none(pud) (!pud_val(pud)) | |
810 | ||
0dd5b7b0 | 811 | #define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK) |
26cf4325 | 812 | |
ac55c768 DM |
813 | #define pgd_none(pgd) (!pgd_val(pgd)) |
814 | ||
0dd5b7b0 | 815 | #define pgd_bad(pgd) (pgd_val(pgd) & ~PAGE_MASK) |
ac55c768 | 816 | |
9e695d2e | 817 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
f05a6865 SR |
818 | void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
819 | pmd_t *pmdp, pmd_t pmd); | |
9e695d2e DM |
820 | #else |
821 | static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, | |
822 | pmd_t *pmdp, pmd_t pmd) | |
823 | { | |
824 | *pmdp = pmd; | |
825 | } | |
826 | #endif | |
827 | ||
828 | static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) | |
829 | { | |
a7b9403f | 830 | unsigned long val = __pa((unsigned long) (ptep)); |
9e695d2e DM |
831 | |
832 | pmd_val(*pmdp) = val; | |
833 | } | |
834 | ||
f5e706ad | 835 | #define pud_set(pudp, pmdp) \ |
a7b9403f | 836 | (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)))) |
9e695d2e DM |
837 | static inline unsigned long __pmd_page(pmd_t pmd) |
838 | { | |
a7b9403f DM |
839 | pte_t pte = __pte(pmd_val(pmd)); |
840 | unsigned long pfn; | |
841 | ||
842 | pfn = pte_pfn(pte); | |
843 | ||
844 | return ((unsigned long) __va(pfn << PAGE_SHIFT)); | |
9e695d2e | 845 | } |
44382b01 NG |
846 | |
847 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
848 | { | |
849 | pte_t pte = __pte(pud_val(pud)); | |
850 | unsigned long pfn; | |
851 | ||
852 | pfn = pte_pfn(pte); | |
853 | ||
854 | return ((unsigned long) __va(pfn << PAGE_SHIFT)); | |
855 | } | |
856 | ||
f5e706ad | 857 | #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) |
f5e706ad | 858 | #define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud)) |
2b77933c | 859 | #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL) |
f5e706ad | 860 | #define pud_present(pud) (pud_val(pud) != 0U) |
2b77933c | 861 | #define pud_clear(pudp) (pud_val(*(pudp)) = 0UL) |
ac55c768 DM |
862 | #define pgd_page_vaddr(pgd) \ |
863 | ((unsigned long) __va(pgd_val(pgd))) | |
864 | #define pgd_present(pgd) (pgd_val(pgd) != 0U) | |
acff7fdb | 865 | #define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL) |
f5e706ad | 866 | |
d8550790 CH |
867 | /* only used by the stubbed out hugetlb gup code, should never be called */ |
868 | #define pgd_page(pgd) NULL | |
869 | ||
0dd5b7b0 DM |
870 | static inline unsigned long pud_large(pud_t pud) |
871 | { | |
872 | pte_t pte = __pte(pud_val(pud)); | |
873 | ||
874 | return pte_val(pte) & _PAGE_PMD_HUGE; | |
875 | } | |
876 | ||
877 | static inline unsigned long pud_pfn(pud_t pud) | |
878 | { | |
879 | pte_t pte = __pte(pud_val(pud)); | |
880 | ||
881 | return pte_pfn(pte); | |
882 | } | |
883 | ||
f5e706ad SR |
884 | /* Same in both SUN4V and SUN4U. */ |
885 | #define pte_none(pte) (!pte_val(pte)) | |
886 | ||
ac55c768 DM |
887 | #define pgd_set(pgdp, pudp) \ |
888 | (pgd_val(*(pgdp)) = (__pa((unsigned long) (pudp)))) | |
889 | ||
f5e706ad SR |
890 | /* to find an entry in a page-table-directory. */ |
891 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
892 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | |
893 | ||
894 | /* to find an entry in a kernel page-table-directory */ | |
895 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
896 | ||
ac55c768 DM |
897 | /* Find an entry in the third-level page table.. */ |
898 | #define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)) | |
899 | #define pud_offset(pgdp, address) \ | |
900 | ((pud_t *) pgd_page_vaddr(*(pgdp)) + pud_index(address)) | |
901 | ||
f5e706ad SR |
902 | /* Find an entry in the second-level page table.. */ |
903 | #define pmd_offset(pudp, address) \ | |
904 | ((pmd_t *) pud_page_vaddr(*(pudp)) + \ | |
905 | (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))) | |
906 | ||
907 | /* Find an entry in the third-level page table.. */ | |
908 | #define pte_index(dir, address) \ | |
909 | ((pte_t *) __pmd_page(*(dir)) + \ | |
910 | ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) | |
911 | #define pte_offset_kernel pte_index | |
912 | #define pte_offset_map pte_index | |
f5e706ad | 913 | #define pte_unmap(pte) do { } while (0) |
f5e706ad | 914 | |
589ee628 IM |
915 | /* We cannot include <linux/mm_types.h> at this point yet: */ |
916 | extern struct mm_struct init_mm; | |
917 | ||
f5e706ad | 918 | /* Actual page table PTE updates. */ |
f05a6865 | 919 | void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, |
c7d9f77d NG |
920 | pte_t *ptep, pte_t orig, int fullmm, |
921 | unsigned int hugepage_shift); | |
f5e706ad | 922 | |
24e49ee3 | 923 | static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, |
c7d9f77d NG |
924 | pte_t *ptep, pte_t orig, int fullmm, |
925 | unsigned int hugepage_shift) | |
24e49ee3 NG |
926 | { |
927 | /* It is more efficient to let flush_tlb_kernel_range() | |
928 | * handle init_mm tlb flushes. | |
929 | * | |
930 | * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U | |
931 | * and SUN4V pte layout, so this inline test is fine. | |
932 | */ | |
933 | if (likely(mm != &init_mm) && pte_accessible(mm, orig)) | |
c7d9f77d | 934 | tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift); |
24e49ee3 NG |
935 | } |
936 | ||
8809aa2d AK |
937 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
938 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, | |
939 | unsigned long addr, | |
940 | pmd_t *pmdp) | |
9e695d2e DM |
941 | { |
942 | pmd_t pmd = *pmdp; | |
2b77933c | 943 | set_pmd_at(mm, addr, pmdp, __pmd(0UL)); |
9e695d2e DM |
944 | return pmd; |
945 | } | |
946 | ||
90f08e39 PZ |
947 | static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, |
948 | pte_t *ptep, pte_t pte, int fullmm) | |
f5e706ad SR |
949 | { |
950 | pte_t orig = *ptep; | |
951 | ||
952 | *ptep = pte; | |
c7d9f77d | 953 | maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT); |
f5e706ad SR |
954 | } |
955 | ||
90f08e39 PZ |
956 | #define set_pte_at(mm,addr,ptep,pte) \ |
957 | __set_pte_at((mm), (addr), (ptep), (pte), 0) | |
958 | ||
f5e706ad SR |
959 | #define pte_clear(mm,addr,ptep) \ |
960 | set_pte_at((mm), (addr), (ptep), __pte(0UL)) | |
961 | ||
90f08e39 PZ |
962 | #define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL |
963 | #define pte_clear_not_present_full(mm,addr,ptep,fullmm) \ | |
964 | __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm)) | |
965 | ||
f5e706ad SR |
966 | #ifdef DCACHE_ALIASING_POSSIBLE |
967 | #define __HAVE_ARCH_MOVE_PTE | |
968 | #define move_pte(pte, prot, old_addr, new_addr) \ | |
969 | ({ \ | |
970 | pte_t newpte = (pte); \ | |
971 | if (tlb_type != hypervisor && pte_present(pte)) { \ | |
972 | unsigned long this_pfn = pte_pfn(pte); \ | |
973 | \ | |
974 | if (pfn_valid(this_pfn) && \ | |
975 | (((old_addr) ^ (new_addr)) & (1 << 13))) \ | |
976 | flush_dcache_page_all(current->mm, \ | |
977 | pfn_to_page(this_pfn)); \ | |
978 | } \ | |
979 | newpte; \ | |
980 | }) | |
981 | #endif | |
982 | ||
2b77933c | 983 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
f5e706ad | 984 | |
f05a6865 SR |
985 | void paging_init(void); |
986 | unsigned long find_ecache_flush_span(unsigned long size); | |
f5e706ad | 987 | |
cb1b8209 | 988 | struct seq_file; |
f05a6865 | 989 | void mmu_info(struct seq_file *); |
cb1b8209 | 990 | |
f5e706ad | 991 | struct vm_area_struct; |
f05a6865 | 992 | void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); |
9e695d2e | 993 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
f05a6865 SR |
994 | void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, |
995 | pmd_t *pmd); | |
9e695d2e | 996 | |
51e5ef1b | 997 | #define __HAVE_ARCH_PMDP_INVALIDATE |
a8e654f0 | 998 | extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, |
51e5ef1b DM |
999 | pmd_t *pmdp); |
1000 | ||
9e695d2e | 1001 | #define __HAVE_ARCH_PGTABLE_DEPOSIT |
f05a6865 SR |
1002 | void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, |
1003 | pgtable_t pgtable); | |
9e695d2e DM |
1004 | |
1005 | #define __HAVE_ARCH_PGTABLE_WITHDRAW | |
f05a6865 | 1006 | pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); |
9e695d2e | 1007 | #endif |
f5e706ad SR |
1008 | |
1009 | /* Encode and de-code a swap entry */ | |
1010 | #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) | |
1011 | #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL)) | |
1012 | #define __swp_entry(type, offset) \ | |
1013 | ( (swp_entry_t) \ | |
1014 | { \ | |
1015 | (((long)(type) << PAGE_SHIFT) | \ | |
1016 | ((long)(offset) << (PAGE_SHIFT + 8UL))) \ | |
1017 | } ) | |
1018 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
1019 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
1020 | ||
f05a6865 | 1021 | int page_in_phys_avail(unsigned long paddr); |
f5e706ad | 1022 | |
f5e706ad SR |
1023 | /* |
1024 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | |
1025 | * its high 4 bits. These macros/functions put it there or get it from there. | |
1026 | */ | |
1027 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | |
1028 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | |
1029 | #define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL) | |
1030 | ||
f05a6865 SR |
1031 | int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long, |
1032 | unsigned long, pgprot_t); | |
3e37fd31 | 1033 | |
74a04967 KA |
1034 | void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma, |
1035 | unsigned long addr, pte_t pte); | |
1036 | ||
1037 | int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma, | |
1038 | unsigned long addr, pte_t oldpte); | |
1039 | ||
1040 | #define __HAVE_ARCH_DO_SWAP_PAGE | |
1041 | static inline void arch_do_swap_page(struct mm_struct *mm, | |
1042 | struct vm_area_struct *vma, | |
1043 | unsigned long addr, | |
1044 | pte_t pte, pte_t oldpte) | |
1045 | { | |
1046 | /* If this is a new page being mapped in, there can be no | |
1047 | * ADI tags stored away for this page. Skip looking for | |
1048 | * stored tags | |
1049 | */ | |
1050 | if (pte_none(oldpte)) | |
1051 | return; | |
1052 | ||
1053 | if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V)) | |
1054 | adi_restore_tags(mm, vma, addr, pte); | |
1055 | } | |
1056 | ||
1057 | #define __HAVE_ARCH_UNMAP_ONE | |
1058 | static inline int arch_unmap_one(struct mm_struct *mm, | |
1059 | struct vm_area_struct *vma, | |
1060 | unsigned long addr, pte_t oldpte) | |
1061 | { | |
1062 | if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V)) | |
1063 | return adi_save_tags(mm, vma, addr, oldpte); | |
1064 | return 0; | |
1065 | } | |
1066 | ||
3e37fd31 DM |
1067 | static inline int io_remap_pfn_range(struct vm_area_struct *vma, |
1068 | unsigned long from, unsigned long pfn, | |
1069 | unsigned long size, pgprot_t prot) | |
1070 | { | |
1071 | unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; | |
1072 | int space = GET_IOSPACE(pfn); | |
1073 | unsigned long phys_base; | |
1074 | ||
1075 | phys_base = offset | (((unsigned long) space) << 32UL); | |
1076 | ||
1077 | return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot); | |
1078 | } | |
40d158e6 | 1079 | #define io_remap_pfn_range io_remap_pfn_range |
3e37fd31 | 1080 | |
5875509d CH |
1081 | static inline unsigned long untagged_addr(unsigned long start) |
1082 | { | |
1083 | if (adi_capable()) { | |
1084 | long addr = start; | |
1085 | ||
1086 | /* If userspace has passed a versioned address, kernel | |
1087 | * will not find it in the VMAs since it does not store | |
1088 | * the version tags in the list of VMAs. Storing version | |
1089 | * tags in list of VMAs is impractical since they can be | |
1090 | * changed any time from userspace without dropping into | |
1091 | * kernel. Any address search in VMAs will be done with | |
1092 | * non-versioned addresses. Ensure the ADI version bits | |
1093 | * are dropped here by sign extending the last bit before | |
1094 | * ADI bits. IOMMU does not implement version tags. | |
1095 | */ | |
1096 | return (addr << (long)adi_nbits()) >> (long)adi_nbits(); | |
1097 | } | |
1098 | ||
1099 | return start; | |
1100 | } | |
1101 | #define untagged_addr untagged_addr | |
1102 | ||
7b9afb86 CH |
1103 | static inline bool pte_access_permitted(pte_t pte, bool write) |
1104 | { | |
1105 | u64 prot; | |
1106 | ||
1107 | if (tlb_type == hypervisor) { | |
1108 | prot = _PAGE_PRESENT_4V | _PAGE_P_4V; | |
1109 | if (write) | |
1110 | prot |= _PAGE_WRITE_4V; | |
1111 | } else { | |
1112 | prot = _PAGE_PRESENT_4U | _PAGE_P_4U; | |
1113 | if (write) | |
1114 | prot |= _PAGE_WRITE_4U; | |
1115 | } | |
1116 | ||
1117 | return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot; | |
1118 | } | |
1119 | #define pte_access_permitted pte_access_permitted | |
1120 | ||
f36391d2 | 1121 | #include <asm/tlbflush.h> |
f5e706ad SR |
1122 | #include <asm-generic/pgtable.h> |
1123 | ||
1124 | /* We provide our own get_unmapped_area to cope with VA holes and | |
1125 | * SHM area cache aliasing for userland. | |
1126 | */ | |
1127 | #define HAVE_ARCH_UNMAPPED_AREA | |
1128 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN | |
1129 | ||
1130 | /* We provide a special get_unmapped_area for framebuffer mmaps to try and use | |
1131 | * the largest alignment possible such that larget PTEs can be used. | |
1132 | */ | |
f05a6865 SR |
1133 | unsigned long get_fb_unmapped_area(struct file *filp, unsigned long, |
1134 | unsigned long, unsigned long, | |
1135 | unsigned long); | |
f5e706ad SR |
1136 | #define HAVE_ARCH_FB_UNMAPPED_AREA |
1137 | ||
f05a6865 SR |
1138 | void sun4v_register_fault_status(void); |
1139 | void sun4v_ktsb_register(void); | |
1140 | void __init cheetah_ecache_flush_init(void); | |
1141 | void sun4v_patch_tlb_handlers(void); | |
f5e706ad SR |
1142 | |
1143 | extern unsigned long cmdline_memory_size; | |
1144 | ||
f05a6865 | 1145 | asmlinkage void do_sparc64_fault(struct pt_regs *regs); |
b539c467 | 1146 | |
f5e706ad SR |
1147 | #endif /* !(__ASSEMBLY__) */ |
1148 | ||
1149 | #endif /* !(_SPARC64_PGTABLE_H) */ |