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root/trunk/src/recompiler/softmmu_template.h

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All: license header changes for 2.0 (OSE headers, add Sun GPL/LGPL disclaimer)

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1 /*
2  *  Software MMU support
3  *
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
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20
21 /*
22  * Sun LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
23  * other than GPL or LGPL is available it will apply instead, Sun elects to use only
24  * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
25  * a choice of LGPL license versions is made available with the language indicating
26  * that LGPLv2 or any later version may be used, or where a choice of which version
27  * of the LGPL is applied is otherwise unspecified.
28  */
29 #define DATA_SIZE (1 << SHIFT)
30
31 #if DATA_SIZE == 8
32 #define SUFFIX q
33 #define USUFFIX q
34 #define DATA_TYPE uint64_t
35 #elif DATA_SIZE == 4
36 #define SUFFIX l
37 #define USUFFIX l
38 #define DATA_TYPE uint32_t
39 #elif DATA_SIZE == 2
40 #define SUFFIX w
41 #define USUFFIX uw
42 #define DATA_TYPE uint16_t
43 #elif DATA_SIZE == 1
44 #define SUFFIX b
45 #define USUFFIX ub
46 #define DATA_TYPE uint8_t
47 #else
48 #error unsupported data size
49 #endif
50
51 #ifdef SOFTMMU_CODE_ACCESS
52 #define READ_ACCESS_TYPE 2
53 #define ADDR_READ addr_code
54 #else
55 #define READ_ACCESS_TYPE 0
56 #define ADDR_READ addr_read
57 #endif
58
59 static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
60                                                         int is_user,
61                                                         void *retaddr);
62 static inline DATA_TYPE glue(io_read, SUFFIX)(target_phys_addr_t physaddr,
63                                               target_ulong tlb_addr)
64 {
65     DATA_TYPE res;
66     int index;
67
68     index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
69 #if SHIFT <= 2
70     res = io_mem_read[index][SHIFT](io_mem_opaque[index], physaddr);
71 #else
72 #ifdef TARGET_WORDS_BIGENDIAN
73     res = (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr) << 32;
74     res |= io_mem_read[index][2](io_mem_opaque[index], physaddr + 4);
75 #else
76     res = io_mem_read[index][2](io_mem_opaque[index], physaddr);
77     res |= (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr + 4) << 32;
78 #endif
79 #endif /* SHIFT > 2 */
80 #ifdef USE_KQEMU
81     env->last_io_time = cpu_get_time_fast();
82 #endif
83     return res;
84 }
85
86 /* handle all cases except unaligned access which span two pages */
87 DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
88                                                          int is_user)
89 {
90     DATA_TYPE res;
91     int index;
92     target_ulong tlb_addr;
93     target_phys_addr_t physaddr;
94     void *retaddr;
95    
96     /* test if there is match for unaligned or IO access */
97     /* XXX: could done more in memory macro in a non portable way */
98     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
99  redo:
100     tlb_addr = env->tlb_table[is_user][index].ADDR_READ;
101     if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
102         physaddr = addr + env->tlb_table[is_user][index].addend;
103         if (tlb_addr & ~TARGET_PAGE_MASK) {
104             /* IO access */
105             if ((addr & (DATA_SIZE - 1)) != 0)
106                 goto do_unaligned_access;
107             res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
108         } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
109             /* slow unaligned access (it spans two pages or IO) */
110         do_unaligned_access:
111             retaddr = GETPC();
112 #ifdef ALIGNED_ONLY
113             do_unaligned_access(addr, READ_ACCESS_TYPE, is_user, retaddr);
114 #endif
115             res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr,
116                                                          is_user, retaddr);
117         } else {
118             /* unaligned/aligned access in the same page */
119 #ifdef ALIGNED_ONLY
120             if ((addr & (DATA_SIZE - 1)) != 0) {
121                 retaddr = GETPC();
122                 do_unaligned_access(addr, READ_ACCESS_TYPE, is_user, retaddr);
123             }
124 #endif
125             res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)physaddr);
126         }
127     } else {
128         /* the page is not in the TLB : fill it */
129         retaddr = GETPC();
130 #ifdef ALIGNED_ONLY
131         if ((addr & (DATA_SIZE - 1)) != 0)
132             do_unaligned_access(addr, READ_ACCESS_TYPE, is_user, retaddr);
133 #endif
134         tlb_fill(addr, READ_ACCESS_TYPE, is_user, retaddr);
135         goto redo;
136     }
137     return res;
138 }
139
140 /* handle all unaligned cases */
141 static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
142                                                         int is_user,
143                                                         void *retaddr)
144 {
145     DATA_TYPE res, res1, res2;
146     int index, shift;
147     target_phys_addr_t physaddr;
148     target_ulong tlb_addr, addr1, addr2;
149
150     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
151  redo:
152     tlb_addr = env->tlb_table[is_user][index].ADDR_READ;
153     if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
154         physaddr = addr + env->tlb_table[is_user][index].addend;
155         if (tlb_addr & ~TARGET_PAGE_MASK) {
156             /* IO access */
157             if ((addr & (DATA_SIZE - 1)) != 0)
158                 goto do_unaligned_access;
159             res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
160         } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
161         do_unaligned_access:
162             /* slow unaligned access (it spans two pages) */
163             addr1 = addr & ~(DATA_SIZE - 1);
164             addr2 = addr1 + DATA_SIZE;
165             res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1,
166                                                           is_user, retaddr);
167             res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2,
168                                                           is_user, retaddr);
169             shift = (addr & (DATA_SIZE - 1)) * 8;
170 #ifdef TARGET_WORDS_BIGENDIAN
171             res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
172 #else
173             res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
174 #endif
175             res = (DATA_TYPE)res;
176         } else {
177             /* unaligned/aligned access in the same page */
178             res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)physaddr);
179         }
180     } else {
181         /* the page is not in the TLB : fill it */
182         tlb_fill(addr, READ_ACCESS_TYPE, is_user, retaddr);
183         goto redo;
184     }
185     return res;
186 }
187
188 #ifndef SOFTMMU_CODE_ACCESS
189
190 static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
191                                                    DATA_TYPE val,
192                                                    int is_user,
193                                                    void *retaddr);
194
195 static inline void glue(io_write, SUFFIX)(target_phys_addr_t physaddr,
196                                           DATA_TYPE val,
197                                           target_ulong tlb_addr,
198                                           void *retaddr)
199 {
200     int index;
201
202     index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
203     env->mem_write_vaddr = tlb_addr;
204     env->mem_write_pc = (unsigned long)retaddr;
205 #if SHIFT <= 2
206     io_mem_write[index][SHIFT](io_mem_opaque[index], physaddr, val);
207 #else
208 #ifdef TARGET_WORDS_BIGENDIAN
209     io_mem_write[index][2](io_mem_opaque[index], physaddr, val >> 32);
210     io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val);
211 #else
212     io_mem_write[index][2](io_mem_opaque[index], physaddr, val);
213     io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val >> 32);
214 #endif
215 #endif /* SHIFT > 2 */
216 #ifdef USE_KQEMU
217     env->last_io_time = cpu_get_time_fast();
218 #endif
219 }
220
221 void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(target_ulong addr,
222                                                     DATA_TYPE val,
223                                                     int is_user)
224 {
225     target_phys_addr_t physaddr;
226     target_ulong tlb_addr;
227     void *retaddr;
228     int index;
229    
230     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
231  redo:
232     tlb_addr = env->tlb_table[is_user][index].addr_write;
233     if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
234         physaddr = addr + env->tlb_table[is_user][index].addend;
235         if (tlb_addr & ~TARGET_PAGE_MASK) {
236             /* IO access */
237             if ((addr & (DATA_SIZE - 1)) != 0)
238                 goto do_unaligned_access;
239             retaddr = GETPC();
240             glue(io_write, SUFFIX)(physaddr, val, tlb_addr, retaddr);
241         } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
242         do_unaligned_access:
243             retaddr = GETPC();
244 #ifdef ALIGNED_ONLY
245             do_unaligned_access(addr, 1, is_user, retaddr);
246 #endif
247             glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val,
248                                                    is_user, retaddr);
249         } else {
250             /* aligned/unaligned access in the same page */
251 #ifdef ALIGNED_ONLY
252             if ((addr & (DATA_SIZE - 1)) != 0) {
253                 retaddr = GETPC();
254                 do_unaligned_access(addr, 1, is_user, retaddr);
255             }
256 #endif
257             glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)physaddr, val);
258         }
259     } else {
260         /* the page is not in the TLB : fill it */
261         retaddr = GETPC();
262 #ifdef ALIGNED_ONLY
263         if ((addr & (DATA_SIZE - 1)) != 0)
264             do_unaligned_access(addr, 1, is_user, retaddr);
265 #endif
266         tlb_fill(addr, 1, is_user, retaddr);
267         goto redo;
268     }
269 }
270
271 /* handles all unaligned cases */
272 static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
273                                                    DATA_TYPE val,
274                                                    int is_user,
275                                                    void *retaddr)
276 {
277     target_phys_addr_t physaddr;
278     target_ulong tlb_addr;
279     int index, i;
280
281     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
282  redo:
283     tlb_addr = env->tlb_table[is_user][index].addr_write;
284     if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
285         physaddr = addr + env->tlb_table[is_user][index].addend;
286         if (tlb_addr & ~TARGET_PAGE_MASK) {
287             /* IO access */
288             if ((addr & (DATA_SIZE - 1)) != 0)
289                 goto do_unaligned_access;
290             glue(io_write, SUFFIX)(physaddr, val, tlb_addr, retaddr);
291         } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
292         do_unaligned_access:
293             /* XXX: not efficient, but simple */
294             for(i = 0;i < DATA_SIZE; i++) {
295 #ifdef TARGET_WORDS_BIGENDIAN
296                 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
297                                           is_user, retaddr);
298 #else
299                 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8),
300                                           is_user, retaddr);
301 #endif
302             }
303         } else {
304             /* aligned/unaligned access in the same page */
305             glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)physaddr, val);
306         }
307     } else {
308         /* the page is not in the TLB : fill it */
309         tlb_fill(addr, 1, is_user, retaddr);
310         goto redo;
311     }
312 }
313
314 #endif /* !defined(SOFTMMU_CODE_ACCESS) */
315
316 #undef READ_ACCESS_TYPE
317 #undef SHIFT
318 #undef DATA_TYPE
319 #undef SUFFIX
320 #undef USUFFIX
321 #undef DATA_SIZE
322 #undef ADDR_READ
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