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1/*
2 * Software MMU support
5fafdf24 3 *
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4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
fad6cb1a 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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19 */
20#define DATA_SIZE (1 << SHIFT)
21
22#if DATA_SIZE == 8
23#define SUFFIX q
61382a50 24#define USUFFIX q
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25#define DATA_TYPE uint64_t
26#elif DATA_SIZE == 4
27#define SUFFIX l
61382a50 28#define USUFFIX l
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29#define DATA_TYPE uint32_t
30#elif DATA_SIZE == 2
31#define SUFFIX w
61382a50 32#define USUFFIX uw
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33#define DATA_TYPE uint16_t
34#elif DATA_SIZE == 1
35#define SUFFIX b
61382a50 36#define USUFFIX ub
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37#define DATA_TYPE uint8_t
38#else
39#error unsupported data size
40#endif
41
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42#ifdef SOFTMMU_CODE_ACCESS
43#define READ_ACCESS_TYPE 2
84b7b8e7 44#define ADDR_READ addr_code
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45#else
46#define READ_ACCESS_TYPE 0
84b7b8e7 47#define ADDR_READ addr_read
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48#endif
49
5fafdf24 50static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
6ebbf390 51 int mmu_idx,
61382a50 52 void *retaddr);
5fafdf24 53static inline DATA_TYPE glue(io_read, SUFFIX)(target_phys_addr_t physaddr,
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54 target_ulong addr,
55 void *retaddr)
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56{
57 DATA_TYPE res;
58 int index;
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PB
59 index = (physaddr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
60 physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
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61 env->mem_io_pc = (unsigned long)retaddr;
62 if (index > (IO_MEM_NOTDIRTY >> IO_MEM_SHIFT)
63 && !can_do_io(env)) {
64 cpu_io_recompile(env, retaddr);
65 }
b92e5a22 66
db8886d3 67 env->mem_io_vaddr = addr;
b92e5a22 68#if SHIFT <= 2
a4193c8a 69 res = io_mem_read[index][SHIFT](io_mem_opaque[index], physaddr);
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70#else
71#ifdef TARGET_WORDS_BIGENDIAN
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72 res = (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr) << 32;
73 res |= io_mem_read[index][2](io_mem_opaque[index], physaddr + 4);
b92e5a22 74#else
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75 res = io_mem_read[index][2](io_mem_opaque[index], physaddr);
76 res |= (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr + 4) << 32;
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77#endif
78#endif /* SHIFT > 2 */
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79#ifdef USE_KQEMU
80 env->last_io_time = cpu_get_time_fast();
81#endif
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82 return res;
83}
84
b92e5a22 85/* handle all cases except unaligned access which span two pages */
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86DATA_TYPE REGPARM glue(glue(__ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
87 int mmu_idx)
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88{
89 DATA_TYPE res;
61382a50 90 int index;
c27004ec 91 target_ulong tlb_addr;
0f459d16 92 target_phys_addr_t addend;
b92e5a22 93 void *retaddr;
3b46e624 94
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95 /* test if there is match for unaligned or IO access */
96 /* XXX: could done more in memory macro in a non portable way */
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97 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
98 redo:
6ebbf390 99 tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
b92e5a22 100 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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101 if (tlb_addr & ~TARGET_PAGE_MASK) {
102 /* IO access */
103 if ((addr & (DATA_SIZE - 1)) != 0)
104 goto do_unaligned_access;
2e70f6ef 105 retaddr = GETPC();
0f459d16 106 addend = env->iotlb[mmu_idx][index];
2e70f6ef 107 res = glue(io_read, SUFFIX)(addend, addr, retaddr);
98699967 108 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
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109 /* slow unaligned access (it spans two pages or IO) */
110 do_unaligned_access:
61382a50 111 retaddr = GETPC();
a64d4718 112#ifdef ALIGNED_ONLY
6ebbf390 113 do_unaligned_access(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
a64d4718 114#endif
5fafdf24 115 res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr,
6ebbf390 116 mmu_idx, retaddr);
b92e5a22 117 } else {
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118 /* unaligned/aligned access in the same page */
119#ifdef ALIGNED_ONLY
120 if ((addr & (DATA_SIZE - 1)) != 0) {
121 retaddr = GETPC();
6ebbf390 122 do_unaligned_access(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
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123 }
124#endif
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PB
125 addend = env->tlb_table[mmu_idx][index].addend;
126 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)(addr+addend));
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127 }
128 } else {
129 /* the page is not in the TLB : fill it */
61382a50 130 retaddr = GETPC();
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131#ifdef ALIGNED_ONLY
132 if ((addr & (DATA_SIZE - 1)) != 0)
6ebbf390 133 do_unaligned_access(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
a64d4718 134#endif
6ebbf390 135 tlb_fill(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
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136 goto redo;
137 }
138 return res;
139}
140
141/* handle all unaligned cases */
5fafdf24 142static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
6ebbf390 143 int mmu_idx,
61382a50 144 void *retaddr)
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145{
146 DATA_TYPE res, res1, res2;
61382a50 147 int index, shift;
0f459d16 148 target_phys_addr_t addend;
c27004ec 149 target_ulong tlb_addr, addr1, addr2;
b92e5a22 150
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151 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
152 redo:
6ebbf390 153 tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
b92e5a22 154 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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155 if (tlb_addr & ~TARGET_PAGE_MASK) {
156 /* IO access */
157 if ((addr & (DATA_SIZE - 1)) != 0)
158 goto do_unaligned_access;
2e70f6ef 159 retaddr = GETPC();
0f459d16 160 addend = env->iotlb[mmu_idx][index];
2e70f6ef 161 res = glue(io_read, SUFFIX)(addend, addr, retaddr);
98699967 162 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
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163 do_unaligned_access:
164 /* slow unaligned access (it spans two pages) */
165 addr1 = addr & ~(DATA_SIZE - 1);
166 addr2 = addr1 + DATA_SIZE;
5fafdf24 167 res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1,
6ebbf390 168 mmu_idx, retaddr);
5fafdf24 169 res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2,
6ebbf390 170 mmu_idx, retaddr);
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171 shift = (addr & (DATA_SIZE - 1)) * 8;
172#ifdef TARGET_WORDS_BIGENDIAN
173 res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
174#else
175 res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
176#endif
6986f88c 177 res = (DATA_TYPE)res;
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178 } else {
179 /* unaligned/aligned access in the same page */
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180 addend = env->tlb_table[mmu_idx][index].addend;
181 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)(addr+addend));
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182 }
183 } else {
184 /* the page is not in the TLB : fill it */
6ebbf390 185 tlb_fill(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
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186 goto redo;
187 }
188 return res;
189}
190
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191#ifndef SOFTMMU_CODE_ACCESS
192
5fafdf24
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193static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
194 DATA_TYPE val,
6ebbf390 195 int mmu_idx,
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196 void *retaddr);
197
5fafdf24 198static inline void glue(io_write, SUFFIX)(target_phys_addr_t physaddr,
b769d8fe 199 DATA_TYPE val,
0f459d16 200 target_ulong addr,
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201 void *retaddr)
202{
203 int index;
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PB
204 index = (physaddr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
205 physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
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206 if (index > (IO_MEM_NOTDIRTY >> IO_MEM_SHIFT)
207 && !can_do_io(env)) {
208 cpu_io_recompile(env, retaddr);
209 }
b769d8fe 210
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211 env->mem_io_vaddr = addr;
212 env->mem_io_pc = (unsigned long)retaddr;
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213#if SHIFT <= 2
214 io_mem_write[index][SHIFT](io_mem_opaque[index], physaddr, val);
215#else
216#ifdef TARGET_WORDS_BIGENDIAN
217 io_mem_write[index][2](io_mem_opaque[index], physaddr, val >> 32);
218 io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val);
219#else
220 io_mem_write[index][2](io_mem_opaque[index], physaddr, val);
221 io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val >> 32);
222#endif
223#endif /* SHIFT > 2 */
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224#ifdef USE_KQEMU
225 env->last_io_time = cpu_get_time_fast();
226#endif
b769d8fe 227}
b92e5a22 228
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229void REGPARM glue(glue(__st, SUFFIX), MMUSUFFIX)(target_ulong addr,
230 DATA_TYPE val,
231 int mmu_idx)
b92e5a22 232{
0f459d16 233 target_phys_addr_t addend;
c27004ec 234 target_ulong tlb_addr;
b92e5a22 235 void *retaddr;
61382a50 236 int index;
3b46e624 237
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238 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
239 redo:
6ebbf390 240 tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
b92e5a22 241 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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242 if (tlb_addr & ~TARGET_PAGE_MASK) {
243 /* IO access */
244 if ((addr & (DATA_SIZE - 1)) != 0)
245 goto do_unaligned_access;
d720b93d 246 retaddr = GETPC();
0f459d16
PB
247 addend = env->iotlb[mmu_idx][index];
248 glue(io_write, SUFFIX)(addend, val, addr, retaddr);
98699967 249 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
b92e5a22 250 do_unaligned_access:
61382a50 251 retaddr = GETPC();
a64d4718 252#ifdef ALIGNED_ONLY
6ebbf390 253 do_unaligned_access(addr, 1, mmu_idx, retaddr);
a64d4718 254#endif
5fafdf24 255 glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val,
6ebbf390 256 mmu_idx, retaddr);
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257 } else {
258 /* aligned/unaligned access in the same page */
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259#ifdef ALIGNED_ONLY
260 if ((addr & (DATA_SIZE - 1)) != 0) {
261 retaddr = GETPC();
6ebbf390 262 do_unaligned_access(addr, 1, mmu_idx, retaddr);
a64d4718
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263 }
264#endif
0f459d16
PB
265 addend = env->tlb_table[mmu_idx][index].addend;
266 glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)(addr+addend), val);
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267 }
268 } else {
269 /* the page is not in the TLB : fill it */
61382a50 270 retaddr = GETPC();
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271#ifdef ALIGNED_ONLY
272 if ((addr & (DATA_SIZE - 1)) != 0)
6ebbf390 273 do_unaligned_access(addr, 1, mmu_idx, retaddr);
a64d4718 274#endif
6ebbf390 275 tlb_fill(addr, 1, mmu_idx, retaddr);
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276 goto redo;
277 }
278}
279
280/* handles all unaligned cases */
5fafdf24 281static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
61382a50 282 DATA_TYPE val,
6ebbf390 283 int mmu_idx,
61382a50 284 void *retaddr)
b92e5a22 285{
0f459d16 286 target_phys_addr_t addend;
c27004ec 287 target_ulong tlb_addr;
61382a50 288 int index, i;
b92e5a22 289
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FB
290 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
291 redo:
6ebbf390 292 tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
b92e5a22 293 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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FB
294 if (tlb_addr & ~TARGET_PAGE_MASK) {
295 /* IO access */
296 if ((addr & (DATA_SIZE - 1)) != 0)
297 goto do_unaligned_access;
0f459d16
PB
298 addend = env->iotlb[mmu_idx][index];
299 glue(io_write, SUFFIX)(addend, val, addr, retaddr);
98699967 300 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
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301 do_unaligned_access:
302 /* XXX: not efficient, but simple */
6c41b272
AZ
303 /* Note: relies on the fact that tlb_fill() does not remove the
304 * previous page from the TLB cache. */
7221fa98 305 for(i = DATA_SIZE - 1; i >= 0; i--) {
b92e5a22 306#ifdef TARGET_WORDS_BIGENDIAN
5fafdf24 307 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
6ebbf390 308 mmu_idx, retaddr);
b92e5a22 309#else
5fafdf24 310 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8),
6ebbf390 311 mmu_idx, retaddr);
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312#endif
313 }
314 } else {
315 /* aligned/unaligned access in the same page */
0f459d16
PB
316 addend = env->tlb_table[mmu_idx][index].addend;
317 glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)(addr+addend), val);
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318 }
319 } else {
320 /* the page is not in the TLB : fill it */
6ebbf390 321 tlb_fill(addr, 1, mmu_idx, retaddr);
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322 goto redo;
323 }
324}
325
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326#endif /* !defined(SOFTMMU_CODE_ACCESS) */
327
328#undef READ_ACCESS_TYPE
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329#undef SHIFT
330#undef DATA_TYPE
331#undef SUFFIX
61382a50 332#undef USUFFIX
b92e5a22 333#undef DATA_SIZE
84b7b8e7 334#undef ADDR_READ