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1 | /* | |
2 | * Software MMU support | |
3 | * | |
4 | * Generate helpers used by TCG for qemu_ld/st ops and code load | |
5 | * functions. | |
6 | * | |
7 | * Included from target op helpers and exec.c. | |
8 | * | |
9 | * Copyright (c) 2003 Fabrice Bellard | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; either | |
14 | * version 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
23 | */ | |
24 | #include "qemu-timer.h" | |
25 | #include "memory.h" | |
26 | ||
27 | #define DATA_SIZE (1 << SHIFT) | |
28 | ||
29 | #if DATA_SIZE == 8 | |
30 | #define SUFFIX q | |
31 | #define USUFFIX q | |
32 | #define DATA_TYPE uint64_t | |
33 | #elif DATA_SIZE == 4 | |
34 | #define SUFFIX l | |
35 | #define USUFFIX l | |
36 | #define DATA_TYPE uint32_t | |
37 | #elif DATA_SIZE == 2 | |
38 | #define SUFFIX w | |
39 | #define USUFFIX uw | |
40 | #define DATA_TYPE uint16_t | |
41 | #elif DATA_SIZE == 1 | |
42 | #define SUFFIX b | |
43 | #define USUFFIX ub | |
44 | #define DATA_TYPE uint8_t | |
45 | #else | |
46 | #error unsupported data size | |
47 | #endif | |
48 | ||
49 | #ifdef SOFTMMU_CODE_ACCESS | |
50 | #define READ_ACCESS_TYPE 2 | |
51 | #define ADDR_READ addr_code | |
52 | #else | |
53 | #define READ_ACCESS_TYPE 0 | |
54 | #define ADDR_READ addr_read | |
55 | #endif | |
56 | ||
57 | #ifndef CONFIG_TCG_PASS_AREG0 | |
58 | #define ENV_PARAM | |
59 | #define ENV_VAR | |
60 | #define CPU_PREFIX | |
61 | #define HELPER_PREFIX __ | |
62 | #else | |
63 | #define ENV_PARAM CPUArchState *env, | |
64 | #define ENV_VAR env, | |
65 | #define CPU_PREFIX cpu_ | |
66 | #define HELPER_PREFIX helper_ | |
67 | #endif | |
68 | ||
69 | static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(ENV_PARAM | |
70 | target_ulong addr, | |
71 | int mmu_idx, | |
72 | uintptr_t retaddr); | |
73 | static inline DATA_TYPE glue(io_read, SUFFIX)(ENV_PARAM | |
74 | target_phys_addr_t physaddr, | |
75 | target_ulong addr, | |
76 | uintptr_t retaddr) | |
77 | { | |
78 | DATA_TYPE res; | |
79 | MemoryRegion *mr = iotlb_to_region(physaddr); | |
80 | ||
81 | physaddr = (physaddr & TARGET_PAGE_MASK) + addr; | |
82 | env->mem_io_pc = retaddr; | |
83 | if (mr != &io_mem_ram && mr != &io_mem_rom | |
84 | && mr != &io_mem_unassigned | |
85 | && mr != &io_mem_notdirty | |
86 | && !can_do_io(env)) { | |
87 | cpu_io_recompile(env, retaddr); | |
88 | } | |
89 | ||
90 | env->mem_io_vaddr = addr; | |
91 | #if SHIFT <= 2 | |
92 | res = io_mem_read(mr, physaddr, 1 << SHIFT); | |
93 | #else | |
94 | #ifdef TARGET_WORDS_BIGENDIAN | |
95 | res = io_mem_read(mr, physaddr, 4) << 32; | |
96 | res |= io_mem_read(mr, physaddr + 4, 4); | |
97 | #else | |
98 | res = io_mem_read(mr, physaddr, 4); | |
99 | res |= io_mem_read(mr, physaddr + 4, 4) << 32; | |
100 | #endif | |
101 | #endif /* SHIFT > 2 */ | |
102 | return res; | |
103 | } | |
104 | ||
105 | /* handle all cases except unaligned access which span two pages */ | |
106 | DATA_TYPE | |
107 | glue(glue(glue(HELPER_PREFIX, ld), SUFFIX), MMUSUFFIX)(ENV_PARAM | |
108 | target_ulong addr, | |
109 | int mmu_idx) | |
110 | { | |
111 | DATA_TYPE res; | |
112 | int index; | |
113 | target_ulong tlb_addr; | |
114 | target_phys_addr_t ioaddr; | |
115 | uintptr_t retaddr; | |
116 | ||
117 | /* test if there is match for unaligned or IO access */ | |
118 | /* XXX: could done more in memory macro in a non portable way */ | |
119 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
120 | redo: | |
121 | tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ; | |
122 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { | |
123 | if (tlb_addr & ~TARGET_PAGE_MASK) { | |
124 | /* IO access */ | |
125 | if ((addr & (DATA_SIZE - 1)) != 0) | |
126 | goto do_unaligned_access; | |
127 | retaddr = GETPC(); | |
128 | ioaddr = env->iotlb[mmu_idx][index]; | |
129 | res = glue(io_read, SUFFIX)(ENV_VAR ioaddr, addr, retaddr); | |
130 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) { | |
131 | /* slow unaligned access (it spans two pages or IO) */ | |
132 | do_unaligned_access: | |
133 | retaddr = GETPC(); | |
134 | #ifdef ALIGNED_ONLY | |
135 | do_unaligned_access(ENV_VAR addr, READ_ACCESS_TYPE, mmu_idx, retaddr); | |
136 | #endif | |
137 | res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(ENV_VAR addr, | |
138 | mmu_idx, retaddr); | |
139 | } else { | |
140 | /* unaligned/aligned access in the same page */ | |
141 | uintptr_t addend; | |
142 | #ifdef ALIGNED_ONLY | |
143 | if ((addr & (DATA_SIZE - 1)) != 0) { | |
144 | retaddr = GETPC(); | |
145 | do_unaligned_access(ENV_VAR addr, READ_ACCESS_TYPE, mmu_idx, retaddr); | |
146 | } | |
147 | #endif | |
148 | addend = env->tlb_table[mmu_idx][index].addend; | |
149 | res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(intptr_t) | |
150 | (addr + addend)); | |
151 | } | |
152 | } else { | |
153 | /* the page is not in the TLB : fill it */ | |
154 | retaddr = GETPC(); | |
155 | #ifdef ALIGNED_ONLY | |
156 | if ((addr & (DATA_SIZE - 1)) != 0) | |
157 | do_unaligned_access(ENV_VAR addr, READ_ACCESS_TYPE, mmu_idx, retaddr); | |
158 | #endif | |
159 | tlb_fill(env, addr, READ_ACCESS_TYPE, mmu_idx, retaddr); | |
160 | goto redo; | |
161 | } | |
162 | return res; | |
163 | } | |
164 | ||
165 | /* handle all unaligned cases */ | |
166 | static DATA_TYPE | |
167 | glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(ENV_PARAM | |
168 | target_ulong addr, | |
169 | int mmu_idx, | |
170 | uintptr_t retaddr) | |
171 | { | |
172 | DATA_TYPE res, res1, res2; | |
173 | int index, shift; | |
174 | target_phys_addr_t ioaddr; | |
175 | target_ulong tlb_addr, addr1, addr2; | |
176 | ||
177 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
178 | redo: | |
179 | tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ; | |
180 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { | |
181 | if (tlb_addr & ~TARGET_PAGE_MASK) { | |
182 | /* IO access */ | |
183 | if ((addr & (DATA_SIZE - 1)) != 0) | |
184 | goto do_unaligned_access; | |
185 | ioaddr = env->iotlb[mmu_idx][index]; | |
186 | res = glue(io_read, SUFFIX)(ENV_VAR ioaddr, addr, retaddr); | |
187 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) { | |
188 | do_unaligned_access: | |
189 | /* slow unaligned access (it spans two pages) */ | |
190 | addr1 = addr & ~(DATA_SIZE - 1); | |
191 | addr2 = addr1 + DATA_SIZE; | |
192 | res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(ENV_VAR addr1, | |
193 | mmu_idx, retaddr); | |
194 | res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(ENV_VAR addr2, | |
195 | mmu_idx, retaddr); | |
196 | shift = (addr & (DATA_SIZE - 1)) * 8; | |
197 | #ifdef TARGET_WORDS_BIGENDIAN | |
198 | res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift)); | |
199 | #else | |
200 | res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift)); | |
201 | #endif | |
202 | res = (DATA_TYPE)res; | |
203 | } else { | |
204 | /* unaligned/aligned access in the same page */ | |
205 | uintptr_t addend = env->tlb_table[mmu_idx][index].addend; | |
206 | res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(intptr_t) | |
207 | (addr + addend)); | |
208 | } | |
209 | } else { | |
210 | /* the page is not in the TLB : fill it */ | |
211 | tlb_fill(env, addr, READ_ACCESS_TYPE, mmu_idx, retaddr); | |
212 | goto redo; | |
213 | } | |
214 | return res; | |
215 | } | |
216 | ||
217 | #ifndef SOFTMMU_CODE_ACCESS | |
218 | ||
219 | static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(ENV_PARAM | |
220 | target_ulong addr, | |
221 | DATA_TYPE val, | |
222 | int mmu_idx, | |
223 | uintptr_t retaddr); | |
224 | ||
225 | static inline void glue(io_write, SUFFIX)(ENV_PARAM | |
226 | target_phys_addr_t physaddr, | |
227 | DATA_TYPE val, | |
228 | target_ulong addr, | |
229 | uintptr_t retaddr) | |
230 | { | |
231 | MemoryRegion *mr = iotlb_to_region(physaddr); | |
232 | ||
233 | physaddr = (physaddr & TARGET_PAGE_MASK) + addr; | |
234 | if (mr != &io_mem_ram && mr != &io_mem_rom | |
235 | && mr != &io_mem_unassigned | |
236 | && mr != &io_mem_notdirty | |
237 | && !can_do_io(env)) { | |
238 | cpu_io_recompile(env, retaddr); | |
239 | } | |
240 | ||
241 | env->mem_io_vaddr = addr; | |
242 | env->mem_io_pc = retaddr; | |
243 | #if SHIFT <= 2 | |
244 | io_mem_write(mr, physaddr, val, 1 << SHIFT); | |
245 | #else | |
246 | #ifdef TARGET_WORDS_BIGENDIAN | |
247 | io_mem_write(mr, physaddr, (val >> 32), 4); | |
248 | io_mem_write(mr, physaddr + 4, (uint32_t)val, 4); | |
249 | #else | |
250 | io_mem_write(mr, physaddr, (uint32_t)val, 4); | |
251 | io_mem_write(mr, physaddr + 4, val >> 32, 4); | |
252 | #endif | |
253 | #endif /* SHIFT > 2 */ | |
254 | } | |
255 | ||
256 | void glue(glue(glue(HELPER_PREFIX, st), SUFFIX), MMUSUFFIX)(ENV_PARAM | |
257 | target_ulong addr, | |
258 | DATA_TYPE val, | |
259 | int mmu_idx) | |
260 | { | |
261 | target_phys_addr_t ioaddr; | |
262 | target_ulong tlb_addr; | |
263 | uintptr_t retaddr; | |
264 | int index; | |
265 | ||
266 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
267 | redo: | |
268 | tlb_addr = env->tlb_table[mmu_idx][index].addr_write; | |
269 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { | |
270 | if (tlb_addr & ~TARGET_PAGE_MASK) { | |
271 | /* IO access */ | |
272 | if ((addr & (DATA_SIZE - 1)) != 0) | |
273 | goto do_unaligned_access; | |
274 | retaddr = GETPC(); | |
275 | ioaddr = env->iotlb[mmu_idx][index]; | |
276 | glue(io_write, SUFFIX)(ENV_VAR ioaddr, val, addr, retaddr); | |
277 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) { | |
278 | do_unaligned_access: | |
279 | retaddr = GETPC(); | |
280 | #ifdef ALIGNED_ONLY | |
281 | do_unaligned_access(ENV_VAR addr, 1, mmu_idx, retaddr); | |
282 | #endif | |
283 | glue(glue(slow_st, SUFFIX), MMUSUFFIX)(ENV_VAR addr, val, | |
284 | mmu_idx, retaddr); | |
285 | } else { | |
286 | /* aligned/unaligned access in the same page */ | |
287 | uintptr_t addend; | |
288 | #ifdef ALIGNED_ONLY | |
289 | if ((addr & (DATA_SIZE - 1)) != 0) { | |
290 | retaddr = GETPC(); | |
291 | do_unaligned_access(ENV_VAR addr, 1, mmu_idx, retaddr); | |
292 | } | |
293 | #endif | |
294 | addend = env->tlb_table[mmu_idx][index].addend; | |
295 | glue(glue(st, SUFFIX), _raw)((uint8_t *)(intptr_t) | |
296 | (addr + addend), val); | |
297 | } | |
298 | } else { | |
299 | /* the page is not in the TLB : fill it */ | |
300 | retaddr = GETPC(); | |
301 | #ifdef ALIGNED_ONLY | |
302 | if ((addr & (DATA_SIZE - 1)) != 0) | |
303 | do_unaligned_access(ENV_VAR addr, 1, mmu_idx, retaddr); | |
304 | #endif | |
305 | tlb_fill(env, addr, 1, mmu_idx, retaddr); | |
306 | goto redo; | |
307 | } | |
308 | } | |
309 | ||
310 | /* handles all unaligned cases */ | |
311 | static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(ENV_PARAM | |
312 | target_ulong addr, | |
313 | DATA_TYPE val, | |
314 | int mmu_idx, | |
315 | uintptr_t retaddr) | |
316 | { | |
317 | target_phys_addr_t ioaddr; | |
318 | target_ulong tlb_addr; | |
319 | int index, i; | |
320 | ||
321 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
322 | redo: | |
323 | tlb_addr = env->tlb_table[mmu_idx][index].addr_write; | |
324 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { | |
325 | if (tlb_addr & ~TARGET_PAGE_MASK) { | |
326 | /* IO access */ | |
327 | if ((addr & (DATA_SIZE - 1)) != 0) | |
328 | goto do_unaligned_access; | |
329 | ioaddr = env->iotlb[mmu_idx][index]; | |
330 | glue(io_write, SUFFIX)(ENV_VAR ioaddr, val, addr, retaddr); | |
331 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) { | |
332 | do_unaligned_access: | |
333 | /* XXX: not efficient, but simple */ | |
334 | /* Note: relies on the fact that tlb_fill() does not remove the | |
335 | * previous page from the TLB cache. */ | |
336 | for(i = DATA_SIZE - 1; i >= 0; i--) { | |
337 | #ifdef TARGET_WORDS_BIGENDIAN | |
338 | glue(slow_stb, MMUSUFFIX)(ENV_VAR addr + i, | |
339 | val >> (((DATA_SIZE - 1) * 8) - (i * 8)), | |
340 | mmu_idx, retaddr); | |
341 | #else | |
342 | glue(slow_stb, MMUSUFFIX)(ENV_VAR addr + i, | |
343 | val >> (i * 8), | |
344 | mmu_idx, retaddr); | |
345 | #endif | |
346 | } | |
347 | } else { | |
348 | /* aligned/unaligned access in the same page */ | |
349 | uintptr_t addend = env->tlb_table[mmu_idx][index].addend; | |
350 | glue(glue(st, SUFFIX), _raw)((uint8_t *)(intptr_t) | |
351 | (addr + addend), val); | |
352 | } | |
353 | } else { | |
354 | /* the page is not in the TLB : fill it */ | |
355 | tlb_fill(env, addr, 1, mmu_idx, retaddr); | |
356 | goto redo; | |
357 | } | |
358 | } | |
359 | ||
360 | #endif /* !defined(SOFTMMU_CODE_ACCESS) */ | |
361 | ||
362 | #undef READ_ACCESS_TYPE | |
363 | #undef SHIFT | |
364 | #undef DATA_TYPE | |
365 | #undef SUFFIX | |
366 | #undef USUFFIX | |
367 | #undef DATA_SIZE | |
368 | #undef ADDR_READ | |
369 | #undef ENV_PARAM | |
370 | #undef ENV_VAR | |
371 | #undef CPU_PREFIX | |
372 | #undef HELPER_PREFIX |