PPC: rename msync to msync_4xx
[qemu.git] / darwin-user / commpage.c
1 /*
2 * Commpage syscalls
3 *
4 * Copyright (c) 2006 Pierre d'Herbemont
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program 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
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include <fcntl.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <errno.h>
23
24 #include <mach/message.h>
25 #include <mach/mach.h>
26 #include <mach/mach_time.h>
27 #include <sys/time.h>
28 #include <sys/mman.h>
29 #include <libkern/OSAtomic.h>
30
31 #include "qemu.h"
32
33 //#define DEBUG_COMMPAGE
34
35 #ifdef DEBUG_COMMPAGE
36 # define DPRINTF(...) do { qemu_log(__VA_ARGS__); printf(__VA_ARGS__); } while(0)
37 #else
38 # define DPRINTF(...) do { qemu_log(__VA_ARGS__); } while(0)
39 #endif
40
41 /********************************************************************
42 * Commpage definitions
43 */
44 #ifdef TARGET_I386
45 /* Reserve space for the commpage see xnu/osfmk/i386/cpu_capabilities.h */
46 # define COMMPAGE_START (-16 * 4096) /* base address is -20 * 4096 */
47 # define COMMPAGE_SIZE (0x1240) /* _COMM_PAGE_AREA_LENGTH is 19 * 4096 */
48 #elif defined(TARGET_PPC)
49 /* Reserve space for the commpage see xnu/osfmk/ppc/cpu_capabilities.h */
50 # define COMMPAGE_START (-8*4096)
51 # define COMMPAGE_SIZE (2*4096) /* its _COMM_PAGE_AREA_USED but _COMM_PAGE_AREA_LENGTH is 7*4096 */
52 #endif
53
54 void do_compare_and_swap32(void *cpu_env, int num);
55 void do_compare_and_swap64(void *cpu_env, int num);
56 void do_add_atomic_word32(void *cpu_env, int num);
57 void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1);
58 void do_nanotime(void *cpu_env, int num);
59
60 void unimpl_commpage(void *cpu_env, int num);
61
62 typedef void (*commpage_8args_function_t)(uint32_t arg1, uint32_t arg2, uint32_t arg3,
63 uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
64 uint32_t arg8);
65 typedef void (*commpage_indirect_function_t)(void *cpu_env, int num, uint32_t arg1,
66 uint32_t arg2, uint32_t arg3, uint32_t arg4, uint32_t arg5,
67 uint32_t arg6, uint32_t arg7, uint32_t arg8);
68
69 #define HAS_PTR 0x10
70 #define NO_PTR 0x20
71 #define CALL_DIRECT 0x1
72 #define CALL_INDIRECT 0x2
73
74 #define COMMPAGE_ENTRY(name, nargs, offset, func, options) \
75 { #name, offset, nargs, options, (commpage_8args_function_t)func }
76
77 struct commpage_entry {
78 char * name;
79 int offset;
80 int nargs;
81 char options;
82 commpage_8args_function_t function;
83 };
84
85 static inline int commpage_code_num(struct commpage_entry *entry)
86 {
87 if((entry->options & HAS_PTR))
88 return entry->offset + 4;
89 else
90 return entry->offset;
91 }
92
93 static inline int commpage_is_indirect(struct commpage_entry *entry)
94 {
95 return !(entry->options & CALL_DIRECT);
96 }
97
98 /********************************************************************
99 * Commpage entry
100 */
101 static struct commpage_entry commpage_entries[] =
102 {
103 COMMPAGE_ENTRY(compare_and_swap32, 0, 0x080, do_compare_and_swap32, CALL_INDIRECT | HAS_PTR),
104 COMMPAGE_ENTRY(compare_and_swap64, 0, 0x0c0, do_compare_and_swap64, CALL_INDIRECT | HAS_PTR),
105 COMMPAGE_ENTRY(enqueue, 0, 0x100, unimpl_commpage, CALL_INDIRECT),
106 COMMPAGE_ENTRY(dequeue, 0, 0x140, unimpl_commpage, CALL_INDIRECT),
107 COMMPAGE_ENTRY(memory_barrier, 0, 0x180, unimpl_commpage, CALL_INDIRECT),
108 COMMPAGE_ENTRY(add_atomic_word32, 0, 0x1a0, do_add_atomic_word32, CALL_INDIRECT | HAS_PTR),
109 COMMPAGE_ENTRY(add_atomic_word64, 0, 0x1c0, unimpl_commpage, CALL_INDIRECT | HAS_PTR),
110
111 COMMPAGE_ENTRY(mach_absolute_time, 0, 0x200, unimpl_commpage, CALL_INDIRECT),
112 COMMPAGE_ENTRY(spinlock_try, 1, 0x220, unimpl_commpage, CALL_INDIRECT),
113 COMMPAGE_ENTRY(spinlock_lock, 1, 0x260, OSSpinLockLock, CALL_DIRECT),
114 COMMPAGE_ENTRY(spinlock_unlock, 1, 0x2a0, OSSpinLockUnlock, CALL_DIRECT),
115 COMMPAGE_ENTRY(pthread_getspecific, 0, 0x2c0, unimpl_commpage, CALL_INDIRECT),
116 COMMPAGE_ENTRY(gettimeofday, 1, 0x2e0, do_cgettimeofday, CALL_INDIRECT),
117 COMMPAGE_ENTRY(sys_dcache_flush, 0, 0x4e0, unimpl_commpage, CALL_INDIRECT),
118 COMMPAGE_ENTRY(sys_icache_invalidate, 0, 0x520, unimpl_commpage, CALL_INDIRECT),
119 COMMPAGE_ENTRY(pthread_self, 0, 0x580, unimpl_commpage, CALL_INDIRECT),
120
121 COMMPAGE_ENTRY(relinquish, 0, 0x5c0, unimpl_commpage, CALL_INDIRECT),
122
123 #ifdef TARGET_I386
124 COMMPAGE_ENTRY(bts, 0, 0x5e0, unimpl_commpage, CALL_INDIRECT),
125 COMMPAGE_ENTRY(btc, 0, 0x5f0, unimpl_commpage, CALL_INDIRECT),
126 #endif
127
128 COMMPAGE_ENTRY(bzero, 2, 0x600, bzero, CALL_DIRECT),
129 COMMPAGE_ENTRY(bcopy, 3, 0x780, bcopy, CALL_DIRECT),
130 COMMPAGE_ENTRY(memcpy, 3, 0x7a0, memcpy, CALL_DIRECT),
131
132 #ifdef TARGET_I386
133 COMMPAGE_ENTRY(old_nanotime, 0, 0xf80, do_nanotime, CALL_INDIRECT),
134 COMMPAGE_ENTRY(memset_pattern, 0, 0xf80, unimpl_commpage, CALL_INDIRECT),
135 COMMPAGE_ENTRY(long_copy, 0, 0x1200, unimpl_commpage, CALL_INDIRECT),
136
137 COMMPAGE_ENTRY(sysintegrity, 0, 0x1600, unimpl_commpage, CALL_INDIRECT),
138
139 COMMPAGE_ENTRY(nanotime, 0, 0x1700, do_nanotime, CALL_INDIRECT),
140 #elif TARGET_PPC
141 COMMPAGE_ENTRY(compare_and_swap32b, 0, 0xf80, unimpl_commpage, CALL_INDIRECT),
142 COMMPAGE_ENTRY(compare_and_swap64b, 0, 0xfc0, unimpl_commpage, CALL_INDIRECT),
143 COMMPAGE_ENTRY(memset_pattern, 0, 0x1000, unimpl_commpage, CALL_INDIRECT),
144 COMMPAGE_ENTRY(bigcopy, 0, 0x1140, unimpl_commpage, CALL_INDIRECT),
145 #endif
146 };
147
148
149 /********************************************************************
150 * Commpage backdoor
151 */
152 static inline void print_commpage_entry(struct commpage_entry entry)
153 {
154 printf("@0x%x %s\n", entry.offset, entry.name);
155 }
156
157 static inline void install_commpage_backdoor_for_entry(struct commpage_entry entry)
158 {
159 #ifdef TARGET_I386
160 char * commpage = (char*)(COMMPAGE_START+entry.offset);
161 int c = 0;
162 if(entry.options & HAS_PTR)
163 {
164 commpage[c++] = (COMMPAGE_START+entry.offset+4) & 0xff;
165 commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 8) & 0xff;
166 commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 16) & 0xff;
167 commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 24) & 0xff;
168 }
169 commpage[c++] = 0xcd;
170 commpage[c++] = 0x79; /* int 0x79 */
171 commpage[c++] = 0xc3; /* ret */
172 #else
173 qerror("can't install the commpage on this arch\n");
174 #endif
175 }
176
177 /********************************************************************
178 * Commpage initialization
179 */
180 void commpage_init(void)
181 {
182 #if (defined(__i386__) ^ defined(TARGET_I386)) || (defined(_ARCH_PPC) ^ defined(TARGET_PPC))
183 int i;
184 void * commpage = (void *)target_mmap( COMMPAGE_START, COMMPAGE_SIZE,
185 PROT_WRITE | PROT_READ, MAP_ANONYMOUS | MAP_FIXED, -1, 0);
186 if((int)commpage != COMMPAGE_START)
187 qerror("can't allocate the commpage\n");
188
189 bzero(commpage, COMMPAGE_SIZE);
190
191 /* XXX: commpage data not handled */
192
193 for(i = 0; i < ARRAY_SIZE(commpage_entries); i++)
194 install_commpage_backdoor_for_entry(commpage_entries[i]);
195 #else
196 /* simply map our pages so they can be executed
197 XXX: we don't really want to do that since in the ppc on ppc situation we may
198 not able to run commpages host optimized instructions (like G5's on a G5),
199 hence this is sometimes a broken fix. */
200 page_set_flags(COMMPAGE_START, COMMPAGE_START+COMMPAGE_SIZE, PROT_EXEC | PROT_READ | PAGE_VALID);
201 #endif
202 }
203
204 /********************************************************************
205 * Commpage implementation
206 */
207 void do_compare_and_swap32(void *cpu_env, int num)
208 {
209 #ifdef TARGET_I386
210 uint32_t old = ((CPUX86State*)cpu_env)->regs[R_EAX];
211 uint32_t *value = (uint32_t*)((CPUX86State*)cpu_env)->regs[R_ECX];
212 DPRINTF("commpage: compare_and_swap32(%x,new,%p)\n", old, value);
213
214 if(old == tswap32(*value))
215 {
216 uint32_t new = ((CPUX86State*)cpu_env)->regs[R_EDX];
217 *value = tswap32(new);
218 /* set zf flag */
219 ((CPUX86State*)cpu_env)->eflags |= 0x40;
220 }
221 else
222 {
223 ((CPUX86State*)cpu_env)->regs[R_EAX] = tswap32(*value);
224 /* unset zf flag */
225 ((CPUX86State*)cpu_env)->eflags &= ~0x40;
226 }
227 #else
228 qerror("do_compare_and_swap32 unimplemented");
229 #endif
230 }
231
232 void do_compare_and_swap64(void *cpu_env, int num)
233 {
234 #ifdef TARGET_I386
235 /* OSAtomicCompareAndSwap64 is not available on non 64 bits ppc, here is a raw implementation */
236 uint64_t old, new, swapped_val;
237 uint64_t *value = (uint64_t*)((CPUX86State*)cpu_env)->regs[R_ESI];
238 old = (uint64_t)((uint64_t)((CPUX86State*)cpu_env)->regs[R_EDX]) << 32 | (uint64_t)((CPUX86State*)cpu_env)->regs[R_EAX];
239
240 DPRINTF("commpage: compare_and_swap64(%" PRIx64 ",new,%p)\n", old, value);
241 swapped_val = tswap64(*value);
242
243 if(old == swapped_val)
244 {
245 new = (uint64_t)((uint64_t)((CPUX86State*)cpu_env)->regs[R_ECX]) << 32 | (uint64_t)((CPUX86State*)cpu_env)->regs[R_EBX];
246 *value = tswap64(new);
247 /* set zf flag */
248 ((CPUX86State*)cpu_env)->eflags |= 0x40;
249 }
250 else
251 {
252 ((CPUX86State*)cpu_env)->regs[R_EAX] = (uint32_t)(swapped_val);
253 ((CPUX86State*)cpu_env)->regs[R_EDX] = (uint32_t)(swapped_val >> 32);
254 /* unset zf flag */
255 ((CPUX86State*)cpu_env)->eflags &= ~0x40;
256 }
257 #else
258 qerror("do_compare_and_swap64 unimplemented");
259 #endif
260 }
261
262 void do_add_atomic_word32(void *cpu_env, int num)
263 {
264 #ifdef TARGET_I386
265 uint32_t amt = ((CPUX86State*)cpu_env)->regs[R_EAX];
266 uint32_t *value = (uint32_t*)((CPUX86State*)cpu_env)->regs[R_EDX];
267 uint32_t swapped_value = tswap32(*value);
268
269 DPRINTF("commpage: add_atomic_word32(%x,%p)\n", amt, value);
270
271 /* old value in EAX */
272 ((CPUX86State*)cpu_env)->regs[R_EAX] = swapped_value;
273 *value = tswap32(swapped_value + amt);
274 #else
275 qerror("do_add_atomic_word32 unimplemented");
276 #endif
277 }
278
279 void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1)
280 {
281 #ifdef TARGET_I386
282 extern int __commpage_gettimeofday(struct timeval *);
283 DPRINTF("commpage: gettimeofday(0x%x)\n", arg1);
284 struct timeval *time = (struct timeval *)arg1;
285 int ret = __commpage_gettimeofday(time);
286 tswap32s((uint32_t*)&time->tv_sec);
287 tswap32s((uint32_t*)&time->tv_usec);
288 ((CPUX86State*)cpu_env)->regs[R_EAX] = ret; /* Success */
289 #else
290 qerror("do_gettimeofday unimplemented");
291 #endif
292 }
293
294 void do_nanotime(void *cpu_env, int num)
295 {
296 #ifdef TARGET_I386
297 uint64_t t = mach_absolute_time();
298 ((CPUX86State*)cpu_env)->regs[R_EAX] = (int)(t & 0xffffffff);
299 ((CPUX86State*)cpu_env)->regs[R_EDX] = (int)((t >> 32) & 0xffffffff);
300 #else
301 qerror("do_nanotime unimplemented");
302 #endif
303 }
304
305 void unimpl_commpage(void *cpu_env, int num)
306 {
307 qerror("qemu: commpage function 0x%x not implemented\n", num);
308 }
309
310 /********************************************************************
311 * do_commpage - called by the main cpu loop
312 */
313 void
314 do_commpage(void *cpu_env, int num, uint32_t arg1, uint32_t arg2, uint32_t arg3,
315 uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
316 uint32_t arg8)
317 {
318 int i, found = 0;
319
320 arg1 = tswap32(arg1);
321 arg2 = tswap32(arg2);
322 arg3 = tswap32(arg3);
323 arg4 = tswap32(arg4);
324 arg5 = tswap32(arg5);
325 arg6 = tswap32(arg6);
326 arg7 = tswap32(arg7);
327 arg8 = tswap32(arg8);
328
329 num = num-COMMPAGE_START-2;
330
331 for(i = 0; i < ARRAY_SIZE(commpage_entries); i++) {
332 if( num == commpage_code_num(&commpage_entries[i]) )
333 {
334 DPRINTF("commpage: %s %s\n", commpage_entries[i].name, commpage_is_indirect(&commpage_entries[i]) ? "[indirect]" : "[direct]");
335 found = 1;
336 if(commpage_is_indirect(&commpage_entries[i]))
337 {
338 commpage_indirect_function_t function = (commpage_indirect_function_t)commpage_entries[i].function;
339 function(cpu_env, num, arg1, arg2, arg3,
340 arg4, arg5, arg6, arg7, arg8);
341 }
342 else
343 {
344 commpage_entries[i].function(arg1, arg2, arg3,
345 arg4, arg5, arg6, arg7, arg8);
346 }
347 break;
348 }
349 }
350
351 if(!found)
352 {
353 gemu_log("qemu: commpage function 0x%x not defined\n", num);
354 gdb_handlesig (cpu_env, SIGTRAP);
355 exit(-1);
356 }
357 }