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Allocate physical memory in low virtual address space
[qemu.git] / softmmu_template.h
CommitLineData
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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
8167ee88 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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18 */
19#define DATA_SIZE (1 << SHIFT)
20
21#if DATA_SIZE == 8
22#define SUFFIX q
61382a50 23#define USUFFIX q
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24#define DATA_TYPE uint64_t
25#elif DATA_SIZE == 4
26#define SUFFIX l
61382a50 27#define USUFFIX l
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28#define DATA_TYPE uint32_t
29#elif DATA_SIZE == 2
30#define SUFFIX w
61382a50 31#define USUFFIX uw
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32#define DATA_TYPE uint16_t
33#elif DATA_SIZE == 1
34#define SUFFIX b
61382a50 35#define USUFFIX ub
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36#define DATA_TYPE uint8_t
37#else
38#error unsupported data size
39#endif
40
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41#ifdef SOFTMMU_CODE_ACCESS
42#define READ_ACCESS_TYPE 2
84b7b8e7 43#define ADDR_READ addr_code
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44#else
45#define READ_ACCESS_TYPE 0
84b7b8e7 46#define ADDR_READ addr_read
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47#endif
48
5fafdf24 49static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
6ebbf390 50 int mmu_idx,
61382a50 51 void *retaddr);
c227f099 52static inline DATA_TYPE glue(io_read, SUFFIX)(target_phys_addr_t physaddr,
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53 target_ulong addr,
54 void *retaddr)
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55{
56 DATA_TYPE res;
57 int index;
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58 index = (physaddr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
59 physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
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60 env->mem_io_pc = (unsigned long)retaddr;
61 if (index > (IO_MEM_NOTDIRTY >> IO_MEM_SHIFT)
62 && !can_do_io(env)) {
63 cpu_io_recompile(env, retaddr);
64 }
b92e5a22 65
db8886d3 66 env->mem_io_vaddr = addr;
b92e5a22 67#if SHIFT <= 2
a4193c8a 68 res = io_mem_read[index][SHIFT](io_mem_opaque[index], physaddr);
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69#else
70#ifdef TARGET_WORDS_BIGENDIAN
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71 res = (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr) << 32;
72 res |= io_mem_read[index][2](io_mem_opaque[index], physaddr + 4);
b92e5a22 73#else
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74 res = io_mem_read[index][2](io_mem_opaque[index], physaddr);
75 res |= (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr + 4) << 32;
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76#endif
77#endif /* SHIFT > 2 */
78 return res;
79}
80
b92e5a22 81/* handle all cases except unaligned access which span two pages */
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82DATA_TYPE REGPARM glue(glue(__ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
83 int mmu_idx)
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84{
85 DATA_TYPE res;
61382a50 86 int index;
c27004ec 87 target_ulong tlb_addr;
c227f099 88 target_phys_addr_t addend;
b92e5a22 89 void *retaddr;
3b46e624 90
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91 /* test if there is match for unaligned or IO access */
92 /* XXX: could done more in memory macro in a non portable way */
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93 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
94 redo:
6ebbf390 95 tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
b92e5a22 96 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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97 if (tlb_addr & ~TARGET_PAGE_MASK) {
98 /* IO access */
99 if ((addr & (DATA_SIZE - 1)) != 0)
100 goto do_unaligned_access;
2e70f6ef 101 retaddr = GETPC();
0f459d16 102 addend = env->iotlb[mmu_idx][index];
2e70f6ef 103 res = glue(io_read, SUFFIX)(addend, addr, retaddr);
98699967 104 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
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105 /* slow unaligned access (it spans two pages or IO) */
106 do_unaligned_access:
61382a50 107 retaddr = GETPC();
a64d4718 108#ifdef ALIGNED_ONLY
6ebbf390 109 do_unaligned_access(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
a64d4718 110#endif
5fafdf24 111 res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr,
6ebbf390 112 mmu_idx, retaddr);
b92e5a22 113 } else {
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114 /* unaligned/aligned access in the same page */
115#ifdef ALIGNED_ONLY
116 if ((addr & (DATA_SIZE - 1)) != 0) {
117 retaddr = GETPC();
6ebbf390 118 do_unaligned_access(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
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119 }
120#endif
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121 addend = env->tlb_table[mmu_idx][index].addend;
122 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)(addr+addend));
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123 }
124 } else {
125 /* the page is not in the TLB : fill it */
61382a50 126 retaddr = GETPC();
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127#ifdef ALIGNED_ONLY
128 if ((addr & (DATA_SIZE - 1)) != 0)
6ebbf390 129 do_unaligned_access(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
a64d4718 130#endif
6ebbf390 131 tlb_fill(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
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132 goto redo;
133 }
134 return res;
135}
136
137/* handle all unaligned cases */
5fafdf24 138static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
6ebbf390 139 int mmu_idx,
61382a50 140 void *retaddr)
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141{
142 DATA_TYPE res, res1, res2;
61382a50 143 int index, shift;
c227f099 144 target_phys_addr_t addend;
c27004ec 145 target_ulong tlb_addr, addr1, addr2;
b92e5a22 146
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147 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
148 redo:
6ebbf390 149 tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
b92e5a22 150 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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151 if (tlb_addr & ~TARGET_PAGE_MASK) {
152 /* IO access */
153 if ((addr & (DATA_SIZE - 1)) != 0)
154 goto do_unaligned_access;
2e70f6ef 155 retaddr = GETPC();
0f459d16 156 addend = env->iotlb[mmu_idx][index];
2e70f6ef 157 res = glue(io_read, SUFFIX)(addend, addr, retaddr);
98699967 158 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
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159 do_unaligned_access:
160 /* slow unaligned access (it spans two pages) */
161 addr1 = addr & ~(DATA_SIZE - 1);
162 addr2 = addr1 + DATA_SIZE;
5fafdf24 163 res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1,
6ebbf390 164 mmu_idx, retaddr);
5fafdf24 165 res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2,
6ebbf390 166 mmu_idx, retaddr);
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167 shift = (addr & (DATA_SIZE - 1)) * 8;
168#ifdef TARGET_WORDS_BIGENDIAN
169 res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
170#else
171 res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
172#endif
6986f88c 173 res = (DATA_TYPE)res;
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174 } else {
175 /* unaligned/aligned access in the same page */
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176 addend = env->tlb_table[mmu_idx][index].addend;
177 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)(addr+addend));
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178 }
179 } else {
180 /* the page is not in the TLB : fill it */
6ebbf390 181 tlb_fill(addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
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182 goto redo;
183 }
184 return res;
185}
186
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187#ifndef SOFTMMU_CODE_ACCESS
188
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189static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
190 DATA_TYPE val,
6ebbf390 191 int mmu_idx,
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192 void *retaddr);
193
c227f099 194static inline void glue(io_write, SUFFIX)(target_phys_addr_t physaddr,
b769d8fe 195 DATA_TYPE val,
0f459d16 196 target_ulong addr,
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197 void *retaddr)
198{
199 int index;
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200 index = (physaddr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
201 physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
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202 if (index > (IO_MEM_NOTDIRTY >> IO_MEM_SHIFT)
203 && !can_do_io(env)) {
204 cpu_io_recompile(env, retaddr);
205 }
b769d8fe 206
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PB
207 env->mem_io_vaddr = addr;
208 env->mem_io_pc = (unsigned long)retaddr;
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209#if SHIFT <= 2
210 io_mem_write[index][SHIFT](io_mem_opaque[index], physaddr, val);
211#else
212#ifdef TARGET_WORDS_BIGENDIAN
213 io_mem_write[index][2](io_mem_opaque[index], physaddr, val >> 32);
214 io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val);
215#else
216 io_mem_write[index][2](io_mem_opaque[index], physaddr, val);
217 io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val >> 32);
218#endif
219#endif /* SHIFT > 2 */
220}
b92e5a22 221
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222void REGPARM glue(glue(__st, SUFFIX), MMUSUFFIX)(target_ulong addr,
223 DATA_TYPE val,
224 int mmu_idx)
b92e5a22 225{
c227f099 226 target_phys_addr_t addend;
c27004ec 227 target_ulong tlb_addr;
b92e5a22 228 void *retaddr;
61382a50 229 int index;
3b46e624 230
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231 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
232 redo:
6ebbf390 233 tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
b92e5a22 234 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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235 if (tlb_addr & ~TARGET_PAGE_MASK) {
236 /* IO access */
237 if ((addr & (DATA_SIZE - 1)) != 0)
238 goto do_unaligned_access;
d720b93d 239 retaddr = GETPC();
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240 addend = env->iotlb[mmu_idx][index];
241 glue(io_write, SUFFIX)(addend, val, addr, retaddr);
98699967 242 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
b92e5a22 243 do_unaligned_access:
61382a50 244 retaddr = GETPC();
a64d4718 245#ifdef ALIGNED_ONLY
6ebbf390 246 do_unaligned_access(addr, 1, mmu_idx, retaddr);
a64d4718 247#endif
5fafdf24 248 glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val,
6ebbf390 249 mmu_idx, retaddr);
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250 } else {
251 /* aligned/unaligned access in the same page */
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252#ifdef ALIGNED_ONLY
253 if ((addr & (DATA_SIZE - 1)) != 0) {
254 retaddr = GETPC();
6ebbf390 255 do_unaligned_access(addr, 1, mmu_idx, retaddr);
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256 }
257#endif
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258 addend = env->tlb_table[mmu_idx][index].addend;
259 glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)(addr+addend), val);
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260 }
261 } else {
262 /* the page is not in the TLB : fill it */
61382a50 263 retaddr = GETPC();
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264#ifdef ALIGNED_ONLY
265 if ((addr & (DATA_SIZE - 1)) != 0)
6ebbf390 266 do_unaligned_access(addr, 1, mmu_idx, retaddr);
a64d4718 267#endif
6ebbf390 268 tlb_fill(addr, 1, mmu_idx, retaddr);
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269 goto redo;
270 }
271}
272
273/* handles all unaligned cases */
5fafdf24 274static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
61382a50 275 DATA_TYPE val,
6ebbf390 276 int mmu_idx,
61382a50 277 void *retaddr)
b92e5a22 278{
c227f099 279 target_phys_addr_t addend;
c27004ec 280 target_ulong tlb_addr;
61382a50 281 int index, i;
b92e5a22 282
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283 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
284 redo:
6ebbf390 285 tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
b92e5a22 286 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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FB
287 if (tlb_addr & ~TARGET_PAGE_MASK) {
288 /* IO access */
289 if ((addr & (DATA_SIZE - 1)) != 0)
290 goto do_unaligned_access;
0f459d16
PB
291 addend = env->iotlb[mmu_idx][index];
292 glue(io_write, SUFFIX)(addend, val, addr, retaddr);
98699967 293 } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
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294 do_unaligned_access:
295 /* XXX: not efficient, but simple */
6c41b272
AZ
296 /* Note: relies on the fact that tlb_fill() does not remove the
297 * previous page from the TLB cache. */
7221fa98 298 for(i = DATA_SIZE - 1; i >= 0; i--) {
b92e5a22 299#ifdef TARGET_WORDS_BIGENDIAN
5fafdf24 300 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
6ebbf390 301 mmu_idx, retaddr);
b92e5a22 302#else
5fafdf24 303 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8),
6ebbf390 304 mmu_idx, retaddr);
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305#endif
306 }
307 } else {
308 /* aligned/unaligned access in the same page */
0f459d16
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309 addend = env->tlb_table[mmu_idx][index].addend;
310 glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)(addr+addend), val);
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311 }
312 } else {
313 /* the page is not in the TLB : fill it */
6ebbf390 314 tlb_fill(addr, 1, mmu_idx, retaddr);
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315 goto redo;
316 }
317}
318
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319#endif /* !defined(SOFTMMU_CODE_ACCESS) */
320
321#undef READ_ACCESS_TYPE
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322#undef SHIFT
323#undef DATA_TYPE
324#undef SUFFIX
61382a50 325#undef USUFFIX
b92e5a22 326#undef DATA_SIZE
84b7b8e7 327#undef ADDR_READ