1 | /* |
2 | * Software MMU support |
3 | * |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2 of the License, or (at your option) any later version. |
8 | * |
9 | * This library is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
16 | * |
17 | */ |
18 | |
19 | /* |
20 | * Generate inline load/store functions for all MMU modes (typically |
21 | * at least _user and _kernel) as well as _data versions, for all data |
22 | * sizes. |
23 | * |
24 | * Used by target op helpers. |
25 | * |
26 | * The syntax for the accessors is: |
27 | * |
28 | * load: cpu_ld{sign}{size}_{mmusuffix}(env, ptr) |
29 | * |
30 | * store: cpu_st{sign}{size}_{mmusuffix}(env, ptr, val) |
31 | * |
32 | * sign is: |
33 | * (empty): for 32 and 64 bit sizes |
34 | * u : unsigned |
35 | * s : signed |
36 | * |
37 | * size is: |
38 | * b: 8 bits |
39 | * w: 16 bits |
40 | * l: 32 bits |
41 | * q: 64 bits |
42 | * |
43 | * mmusuffix is one of the generic suffixes "data" or "code", or |
44 | * (for softmmu configs) a target-specific MMU mode suffix as defined |
45 | * in target cpu.h. |
46 | */ |
47 | #ifndef CPU_LDST_H |
48 | #define CPU_LDST_H |
49 | |
50 | #if defined(CONFIG_USER_ONLY) |
51 | /* sparc32plus has 64bit long but 32bit space address |
52 | * this can make bad result with g2h() and h2g() |
53 | */ |
54 | #if TARGET_VIRT_ADDR_SPACE_BITS <= 32 |
55 | typedef uint32_t abi_ptr; |
56 | #define TARGET_ABI_FMT_ptr "%x" |
57 | #else |
58 | typedef uint64_t abi_ptr; |
59 | #define TARGET_ABI_FMT_ptr "%"PRIx64 |
60 | #endif |
61 | |
62 | /* All direct uses of g2h and h2g need to go away for usermode softmmu. */ |
63 | #define g2h(x) ((void *)((unsigned long)(abi_ptr)(x) + guest_base)) |
64 | |
65 | #if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS |
66 | #define guest_addr_valid(x) (1) |
67 | #else |
68 | #define guest_addr_valid(x) ((x) <= GUEST_ADDR_MAX) |
69 | #endif |
70 | #define h2g_valid(x) guest_addr_valid((unsigned long)(x) - guest_base) |
71 | |
72 | static inline int guest_range_valid(unsigned long start, unsigned long len) |
73 | { |
74 | return len - 1 <= GUEST_ADDR_MAX && start <= GUEST_ADDR_MAX - len + 1; |
75 | } |
76 | |
77 | #define h2g_nocheck(x) ({ \ |
78 | unsigned long __ret = (unsigned long)(x) - guest_base; \ |
79 | (abi_ptr)__ret; \ |
80 | }) |
81 | |
82 | #define h2g(x) ({ \ |
83 | /* Check if given address fits target address space */ \ |
84 | assert(h2g_valid(x)); \ |
85 | h2g_nocheck(x); \ |
86 | }) |
87 | #else |
88 | typedef target_ulong abi_ptr; |
89 | #define TARGET_ABI_FMT_ptr TARGET_ABI_FMT_lx |
90 | #endif |
91 | |
92 | #if defined(CONFIG_USER_ONLY) |
93 | |
94 | extern __thread uintptr_t helper_retaddr; |
95 | |
96 | static inline void set_helper_retaddr(uintptr_t ra) |
97 | { |
98 | helper_retaddr = ra; |
99 | /* |
100 | * Ensure that this write is visible to the SIGSEGV handler that |
101 | * may be invoked due to a subsequent invalid memory operation. |
102 | */ |
103 | signal_barrier(); |
104 | } |
105 | |
106 | static inline void clear_helper_retaddr(void) |
107 | { |
108 | /* |
109 | * Ensure that previous memory operations have succeeded before |
110 | * removing the data visible to the signal handler. |
111 | */ |
112 | signal_barrier(); |
113 | helper_retaddr = 0; |
114 | } |
115 | |
116 | /* In user-only mode we provide only the _code and _data accessors. */ |
117 | |
118 | #define MEMSUFFIX _data |
119 | #define DATA_SIZE 1 |
120 | #include "exec/cpu_ldst_useronly_template.h" |
121 | |
122 | #define DATA_SIZE 2 |
123 | #include "exec/cpu_ldst_useronly_template.h" |
124 | |
125 | #define DATA_SIZE 4 |
126 | #include "exec/cpu_ldst_useronly_template.h" |
127 | |
128 | #define DATA_SIZE 8 |
129 | #include "exec/cpu_ldst_useronly_template.h" |
130 | #undef MEMSUFFIX |
131 | |
132 | #define MEMSUFFIX _code |
133 | #define CODE_ACCESS |
134 | #define DATA_SIZE 1 |
135 | #include "exec/cpu_ldst_useronly_template.h" |
136 | |
137 | #define DATA_SIZE 2 |
138 | #include "exec/cpu_ldst_useronly_template.h" |
139 | |
140 | #define DATA_SIZE 4 |
141 | #include "exec/cpu_ldst_useronly_template.h" |
142 | |
143 | #define DATA_SIZE 8 |
144 | #include "exec/cpu_ldst_useronly_template.h" |
145 | #undef MEMSUFFIX |
146 | #undef CODE_ACCESS |
147 | |
148 | #else |
149 | |
150 | /* The memory helpers for tcg-generated code need tcg_target_long etc. */ |
151 | #include "tcg.h" |
152 | |
153 | static inline target_ulong tlb_addr_write(const CPUTLBEntry *entry) |
154 | { |
155 | #if TCG_OVERSIZED_GUEST |
156 | return entry->addr_write; |
157 | #else |
158 | return atomic_read(&entry->addr_write); |
159 | #endif |
160 | } |
161 | |
162 | /* Find the TLB index corresponding to the mmu_idx + address pair. */ |
163 | static inline uintptr_t tlb_index(CPUArchState *env, uintptr_t mmu_idx, |
164 | target_ulong addr) |
165 | { |
166 | uintptr_t size_mask = env_tlb(env)->f[mmu_idx].mask >> CPU_TLB_ENTRY_BITS; |
167 | |
168 | return (addr >> TARGET_PAGE_BITS) & size_mask; |
169 | } |
170 | |
171 | static inline size_t tlb_n_entries(CPUArchState *env, uintptr_t mmu_idx) |
172 | { |
173 | return (env_tlb(env)->f[mmu_idx].mask >> CPU_TLB_ENTRY_BITS) + 1; |
174 | } |
175 | |
176 | /* Find the TLB entry corresponding to the mmu_idx + address pair. */ |
177 | static inline CPUTLBEntry *tlb_entry(CPUArchState *env, uintptr_t mmu_idx, |
178 | target_ulong addr) |
179 | { |
180 | return &env_tlb(env)->f[mmu_idx].table[tlb_index(env, mmu_idx, addr)]; |
181 | } |
182 | |
183 | #ifdef MMU_MODE0_SUFFIX |
184 | #define CPU_MMU_INDEX 0 |
185 | #define MEMSUFFIX MMU_MODE0_SUFFIX |
186 | #define DATA_SIZE 1 |
187 | #include "exec/cpu_ldst_template.h" |
188 | |
189 | #define DATA_SIZE 2 |
190 | #include "exec/cpu_ldst_template.h" |
191 | |
192 | #define DATA_SIZE 4 |
193 | #include "exec/cpu_ldst_template.h" |
194 | |
195 | #define DATA_SIZE 8 |
196 | #include "exec/cpu_ldst_template.h" |
197 | #undef CPU_MMU_INDEX |
198 | #undef MEMSUFFIX |
199 | #endif |
200 | |
201 | #if (NB_MMU_MODES >= 2) && defined(MMU_MODE1_SUFFIX) |
202 | #define CPU_MMU_INDEX 1 |
203 | #define MEMSUFFIX MMU_MODE1_SUFFIX |
204 | #define DATA_SIZE 1 |
205 | #include "exec/cpu_ldst_template.h" |
206 | |
207 | #define DATA_SIZE 2 |
208 | #include "exec/cpu_ldst_template.h" |
209 | |
210 | #define DATA_SIZE 4 |
211 | #include "exec/cpu_ldst_template.h" |
212 | |
213 | #define DATA_SIZE 8 |
214 | #include "exec/cpu_ldst_template.h" |
215 | #undef CPU_MMU_INDEX |
216 | #undef MEMSUFFIX |
217 | #endif |
218 | |
219 | #if (NB_MMU_MODES >= 3) && defined(MMU_MODE2_SUFFIX) |
220 | |
221 | #define CPU_MMU_INDEX 2 |
222 | #define MEMSUFFIX MMU_MODE2_SUFFIX |
223 | #define DATA_SIZE 1 |
224 | #include "exec/cpu_ldst_template.h" |
225 | |
226 | #define DATA_SIZE 2 |
227 | #include "exec/cpu_ldst_template.h" |
228 | |
229 | #define DATA_SIZE 4 |
230 | #include "exec/cpu_ldst_template.h" |
231 | |
232 | #define DATA_SIZE 8 |
233 | #include "exec/cpu_ldst_template.h" |
234 | #undef CPU_MMU_INDEX |
235 | #undef MEMSUFFIX |
236 | #endif /* (NB_MMU_MODES >= 3) */ |
237 | |
238 | #if (NB_MMU_MODES >= 4) && defined(MMU_MODE3_SUFFIX) |
239 | |
240 | #define CPU_MMU_INDEX 3 |
241 | #define MEMSUFFIX MMU_MODE3_SUFFIX |
242 | #define DATA_SIZE 1 |
243 | #include "exec/cpu_ldst_template.h" |
244 | |
245 | #define DATA_SIZE 2 |
246 | #include "exec/cpu_ldst_template.h" |
247 | |
248 | #define DATA_SIZE 4 |
249 | #include "exec/cpu_ldst_template.h" |
250 | |
251 | #define DATA_SIZE 8 |
252 | #include "exec/cpu_ldst_template.h" |
253 | #undef CPU_MMU_INDEX |
254 | #undef MEMSUFFIX |
255 | #endif /* (NB_MMU_MODES >= 4) */ |
256 | |
257 | #if (NB_MMU_MODES >= 5) && defined(MMU_MODE4_SUFFIX) |
258 | |
259 | #define CPU_MMU_INDEX 4 |
260 | #define MEMSUFFIX MMU_MODE4_SUFFIX |
261 | #define DATA_SIZE 1 |
262 | #include "exec/cpu_ldst_template.h" |
263 | |
264 | #define DATA_SIZE 2 |
265 | #include "exec/cpu_ldst_template.h" |
266 | |
267 | #define DATA_SIZE 4 |
268 | #include "exec/cpu_ldst_template.h" |
269 | |
270 | #define DATA_SIZE 8 |
271 | #include "exec/cpu_ldst_template.h" |
272 | #undef CPU_MMU_INDEX |
273 | #undef MEMSUFFIX |
274 | #endif /* (NB_MMU_MODES >= 5) */ |
275 | |
276 | #if (NB_MMU_MODES >= 6) && defined(MMU_MODE5_SUFFIX) |
277 | |
278 | #define CPU_MMU_INDEX 5 |
279 | #define MEMSUFFIX MMU_MODE5_SUFFIX |
280 | #define DATA_SIZE 1 |
281 | #include "exec/cpu_ldst_template.h" |
282 | |
283 | #define DATA_SIZE 2 |
284 | #include "exec/cpu_ldst_template.h" |
285 | |
286 | #define DATA_SIZE 4 |
287 | #include "exec/cpu_ldst_template.h" |
288 | |
289 | #define DATA_SIZE 8 |
290 | #include "exec/cpu_ldst_template.h" |
291 | #undef CPU_MMU_INDEX |
292 | #undef MEMSUFFIX |
293 | #endif /* (NB_MMU_MODES >= 6) */ |
294 | |
295 | #if (NB_MMU_MODES >= 7) && defined(MMU_MODE6_SUFFIX) |
296 | |
297 | #define CPU_MMU_INDEX 6 |
298 | #define MEMSUFFIX MMU_MODE6_SUFFIX |
299 | #define DATA_SIZE 1 |
300 | #include "exec/cpu_ldst_template.h" |
301 | |
302 | #define DATA_SIZE 2 |
303 | #include "exec/cpu_ldst_template.h" |
304 | |
305 | #define DATA_SIZE 4 |
306 | #include "exec/cpu_ldst_template.h" |
307 | |
308 | #define DATA_SIZE 8 |
309 | #include "exec/cpu_ldst_template.h" |
310 | #undef CPU_MMU_INDEX |
311 | #undef MEMSUFFIX |
312 | #endif /* (NB_MMU_MODES >= 7) */ |
313 | |
314 | #if (NB_MMU_MODES >= 8) && defined(MMU_MODE7_SUFFIX) |
315 | |
316 | #define CPU_MMU_INDEX 7 |
317 | #define MEMSUFFIX MMU_MODE7_SUFFIX |
318 | #define DATA_SIZE 1 |
319 | #include "exec/cpu_ldst_template.h" |
320 | |
321 | #define DATA_SIZE 2 |
322 | #include "exec/cpu_ldst_template.h" |
323 | |
324 | #define DATA_SIZE 4 |
325 | #include "exec/cpu_ldst_template.h" |
326 | |
327 | #define DATA_SIZE 8 |
328 | #include "exec/cpu_ldst_template.h" |
329 | #undef CPU_MMU_INDEX |
330 | #undef MEMSUFFIX |
331 | #endif /* (NB_MMU_MODES >= 8) */ |
332 | |
333 | #if (NB_MMU_MODES >= 9) && defined(MMU_MODE8_SUFFIX) |
334 | |
335 | #define CPU_MMU_INDEX 8 |
336 | #define MEMSUFFIX MMU_MODE8_SUFFIX |
337 | #define DATA_SIZE 1 |
338 | #include "exec/cpu_ldst_template.h" |
339 | |
340 | #define DATA_SIZE 2 |
341 | #include "exec/cpu_ldst_template.h" |
342 | |
343 | #define DATA_SIZE 4 |
344 | #include "exec/cpu_ldst_template.h" |
345 | |
346 | #define DATA_SIZE 8 |
347 | #include "exec/cpu_ldst_template.h" |
348 | #undef CPU_MMU_INDEX |
349 | #undef MEMSUFFIX |
350 | #endif /* (NB_MMU_MODES >= 9) */ |
351 | |
352 | #if (NB_MMU_MODES >= 10) && defined(MMU_MODE9_SUFFIX) |
353 | |
354 | #define CPU_MMU_INDEX 9 |
355 | #define MEMSUFFIX MMU_MODE9_SUFFIX |
356 | #define DATA_SIZE 1 |
357 | #include "exec/cpu_ldst_template.h" |
358 | |
359 | #define DATA_SIZE 2 |
360 | #include "exec/cpu_ldst_template.h" |
361 | |
362 | #define DATA_SIZE 4 |
363 | #include "exec/cpu_ldst_template.h" |
364 | |
365 | #define DATA_SIZE 8 |
366 | #include "exec/cpu_ldst_template.h" |
367 | #undef CPU_MMU_INDEX |
368 | #undef MEMSUFFIX |
369 | #endif /* (NB_MMU_MODES >= 10) */ |
370 | |
371 | #if (NB_MMU_MODES >= 11) && defined(MMU_MODE10_SUFFIX) |
372 | |
373 | #define CPU_MMU_INDEX 10 |
374 | #define MEMSUFFIX MMU_MODE10_SUFFIX |
375 | #define DATA_SIZE 1 |
376 | #include "exec/cpu_ldst_template.h" |
377 | |
378 | #define DATA_SIZE 2 |
379 | #include "exec/cpu_ldst_template.h" |
380 | |
381 | #define DATA_SIZE 4 |
382 | #include "exec/cpu_ldst_template.h" |
383 | |
384 | #define DATA_SIZE 8 |
385 | #include "exec/cpu_ldst_template.h" |
386 | #undef CPU_MMU_INDEX |
387 | #undef MEMSUFFIX |
388 | #endif /* (NB_MMU_MODES >= 11) */ |
389 | |
390 | #if (NB_MMU_MODES >= 12) && defined(MMU_MODE11_SUFFIX) |
391 | |
392 | #define CPU_MMU_INDEX 11 |
393 | #define MEMSUFFIX MMU_MODE11_SUFFIX |
394 | #define DATA_SIZE 1 |
395 | #include "exec/cpu_ldst_template.h" |
396 | |
397 | #define DATA_SIZE 2 |
398 | #include "exec/cpu_ldst_template.h" |
399 | |
400 | #define DATA_SIZE 4 |
401 | #include "exec/cpu_ldst_template.h" |
402 | |
403 | #define DATA_SIZE 8 |
404 | #include "exec/cpu_ldst_template.h" |
405 | #undef CPU_MMU_INDEX |
406 | #undef MEMSUFFIX |
407 | #endif /* (NB_MMU_MODES >= 12) */ |
408 | |
409 | #if (NB_MMU_MODES > 12) |
410 | #error "NB_MMU_MODES > 12 is not supported for now" |
411 | #endif /* (NB_MMU_MODES > 12) */ |
412 | |
413 | /* these access are slower, they must be as rare as possible */ |
414 | #define CPU_MMU_INDEX (cpu_mmu_index(env, false)) |
415 | #define MEMSUFFIX _data |
416 | #define DATA_SIZE 1 |
417 | #include "exec/cpu_ldst_template.h" |
418 | |
419 | #define DATA_SIZE 2 |
420 | #include "exec/cpu_ldst_template.h" |
421 | |
422 | #define DATA_SIZE 4 |
423 | #include "exec/cpu_ldst_template.h" |
424 | |
425 | #define DATA_SIZE 8 |
426 | #include "exec/cpu_ldst_template.h" |
427 | #undef CPU_MMU_INDEX |
428 | #undef MEMSUFFIX |
429 | |
430 | #define CPU_MMU_INDEX (cpu_mmu_index(env, true)) |
431 | #define MEMSUFFIX _code |
432 | #define SOFTMMU_CODE_ACCESS |
433 | |
434 | #define DATA_SIZE 1 |
435 | #include "exec/cpu_ldst_template.h" |
436 | |
437 | #define DATA_SIZE 2 |
438 | #include "exec/cpu_ldst_template.h" |
439 | |
440 | #define DATA_SIZE 4 |
441 | #include "exec/cpu_ldst_template.h" |
442 | |
443 | #define DATA_SIZE 8 |
444 | #include "exec/cpu_ldst_template.h" |
445 | |
446 | #undef CPU_MMU_INDEX |
447 | #undef MEMSUFFIX |
448 | #undef SOFTMMU_CODE_ACCESS |
449 | |
450 | #endif /* defined(CONFIG_USER_ONLY) */ |
451 | |
452 | /** |
453 | * tlb_vaddr_to_host: |
454 | * @env: CPUArchState |
455 | * @addr: guest virtual address to look up |
456 | * @access_type: 0 for read, 1 for write, 2 for execute |
457 | * @mmu_idx: MMU index to use for lookup |
458 | * |
459 | * Look up the specified guest virtual index in the TCG softmmu TLB. |
460 | * If we can translate a host virtual address suitable for direct RAM |
461 | * access, without causing a guest exception, then return it. |
462 | * Otherwise (TLB entry is for an I/O access, guest software |
463 | * TLB fill required, etc) return NULL. |
464 | */ |
465 | #ifdef CONFIG_USER_ONLY |
466 | static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr, |
467 | MMUAccessType access_type, int mmu_idx) |
468 | { |
469 | return g2h(addr); |
470 | } |
471 | #else |
472 | void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr, |
473 | MMUAccessType access_type, int mmu_idx); |
474 | #endif |
475 | |
476 | #endif /* CPU_LDST_H */ |
477 | |