PPC: booke206: Check for min/max TLB entry size
[qemu.git] / m68k-semi.c
1 /*
2 * m68k/ColdFire Semihosting syscall interface
3 *
4 * Copyright (c) 2005-2007 CodeSourcery.
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
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 #include <errno.h>
23 #include <fcntl.h>
24 #include <unistd.h>
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <sys/time.h>
28 #include <time.h>
29
30 #include "cpu.h"
31 #if defined(CONFIG_USER_ONLY)
32 #include "qemu.h"
33 #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
34 #else
35 #include "qemu-common.h"
36 #include "gdbstub.h"
37 #include "softmmu-semi.h"
38 #endif
39 #include "sysemu.h"
40
41 #define HOSTED_EXIT 0
42 #define HOSTED_INIT_SIM 1
43 #define HOSTED_OPEN 2
44 #define HOSTED_CLOSE 3
45 #define HOSTED_READ 4
46 #define HOSTED_WRITE 5
47 #define HOSTED_LSEEK 6
48 #define HOSTED_RENAME 7
49 #define HOSTED_UNLINK 8
50 #define HOSTED_STAT 9
51 #define HOSTED_FSTAT 10
52 #define HOSTED_GETTIMEOFDAY 11
53 #define HOSTED_ISATTY 12
54 #define HOSTED_SYSTEM 13
55
56 typedef uint32_t gdb_mode_t;
57 typedef uint32_t gdb_time_t;
58
59 struct m68k_gdb_stat {
60 uint32_t gdb_st_dev; /* device */
61 uint32_t gdb_st_ino; /* inode */
62 gdb_mode_t gdb_st_mode; /* protection */
63 uint32_t gdb_st_nlink; /* number of hard links */
64 uint32_t gdb_st_uid; /* user ID of owner */
65 uint32_t gdb_st_gid; /* group ID of owner */
66 uint32_t gdb_st_rdev; /* device type (if inode device) */
67 uint64_t gdb_st_size; /* total size, in bytes */
68 uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
69 uint64_t gdb_st_blocks; /* number of blocks allocated */
70 gdb_time_t gdb_st_atime; /* time of last access */
71 gdb_time_t gdb_st_mtime; /* time of last modification */
72 gdb_time_t gdb_st_ctime; /* time of last change */
73 } QEMU_PACKED;
74
75 struct gdb_timeval {
76 gdb_time_t tv_sec; /* second */
77 uint64_t tv_usec; /* microsecond */
78 } QEMU_PACKED;
79
80 #define GDB_O_RDONLY 0x0
81 #define GDB_O_WRONLY 0x1
82 #define GDB_O_RDWR 0x2
83 #define GDB_O_APPEND 0x8
84 #define GDB_O_CREAT 0x200
85 #define GDB_O_TRUNC 0x400
86 #define GDB_O_EXCL 0x800
87
88 static int translate_openflags(int flags)
89 {
90 int hf;
91
92 if (flags & GDB_O_WRONLY)
93 hf = O_WRONLY;
94 else if (flags & GDB_O_RDWR)
95 hf = O_RDWR;
96 else
97 hf = O_RDONLY;
98
99 if (flags & GDB_O_APPEND) hf |= O_APPEND;
100 if (flags & GDB_O_CREAT) hf |= O_CREAT;
101 if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
102 if (flags & GDB_O_EXCL) hf |= O_EXCL;
103
104 return hf;
105 }
106
107 static void translate_stat(CPUState *env, target_ulong addr, struct stat *s)
108 {
109 struct m68k_gdb_stat *p;
110
111 if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0)))
112 /* FIXME - should this return an error code? */
113 return;
114 p->gdb_st_dev = cpu_to_be32(s->st_dev);
115 p->gdb_st_ino = cpu_to_be32(s->st_ino);
116 p->gdb_st_mode = cpu_to_be32(s->st_mode);
117 p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
118 p->gdb_st_uid = cpu_to_be32(s->st_uid);
119 p->gdb_st_gid = cpu_to_be32(s->st_gid);
120 p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
121 p->gdb_st_size = cpu_to_be64(s->st_size);
122 #ifdef _WIN32
123 /* Windows stat is missing some fields. */
124 p->gdb_st_blksize = 0;
125 p->gdb_st_blocks = 0;
126 #else
127 p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
128 p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
129 #endif
130 p->gdb_st_atime = cpu_to_be32(s->st_atime);
131 p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
132 p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
133 unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
134 }
135
136 static int m68k_semi_is_fseek;
137
138 static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
139 {
140 target_ulong args;
141
142 args = env->dregs[1];
143 if (m68k_semi_is_fseek) {
144 /* FIXME: We've already lost the high bits of the fseek
145 return value. */
146 /* FIXME - handle put_user() failure */
147 put_user_u32(0, args);
148 args += 4;
149 m68k_semi_is_fseek = 0;
150 }
151 /* FIXME - handle put_user() failure */
152 put_user_u32(ret, args);
153 put_user_u32(errno, args + 4);
154 }
155
156 #define ARG(n) \
157 ({ \
158 target_ulong __arg; \
159 /* FIXME - handle get_user() failure */ \
160 get_user_ual(__arg, args + (n) * 4); \
161 __arg; \
162 })
163 #define PARG(x) ((unsigned long)ARG(x))
164 void do_m68k_semihosting(CPUM68KState *env, int nr)
165 {
166 uint32_t args;
167 void *p;
168 void *q;
169 uint32_t len;
170 uint32_t result;
171
172 args = env->dregs[1];
173 switch (nr) {
174 case HOSTED_EXIT:
175 gdb_exit(env, env->dregs[0]);
176 exit(env->dregs[0]);
177 case HOSTED_OPEN:
178 if (use_gdb_syscalls()) {
179 gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1),
180 ARG(2), ARG(3));
181 return;
182 } else {
183 if (!(p = lock_user_string(ARG(0)))) {
184 /* FIXME - check error code? */
185 result = -1;
186 } else {
187 result = open(p, translate_openflags(ARG(2)), ARG(3));
188 unlock_user(p, ARG(0), 0);
189 }
190 }
191 break;
192 case HOSTED_CLOSE:
193 {
194 /* Ignore attempts to close stdin/out/err. */
195 int fd = ARG(0);
196 if (fd > 2) {
197 if (use_gdb_syscalls()) {
198 gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0));
199 return;
200 } else {
201 result = close(fd);
202 }
203 } else {
204 result = 0;
205 }
206 break;
207 }
208 case HOSTED_READ:
209 len = ARG(2);
210 if (use_gdb_syscalls()) {
211 gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
212 ARG(0), ARG(1), len);
213 return;
214 } else {
215 if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) {
216 /* FIXME - check error code? */
217 result = -1;
218 } else {
219 result = read(ARG(0), p, len);
220 unlock_user(p, ARG(1), len);
221 }
222 }
223 break;
224 case HOSTED_WRITE:
225 len = ARG(2);
226 if (use_gdb_syscalls()) {
227 gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
228 ARG(0), ARG(1), len);
229 return;
230 } else {
231 if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) {
232 /* FIXME - check error code? */
233 result = -1;
234 } else {
235 result = write(ARG(0), p, len);
236 unlock_user(p, ARG(0), 0);
237 }
238 }
239 break;
240 case HOSTED_LSEEK:
241 {
242 uint64_t off;
243 off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
244 if (use_gdb_syscalls()) {
245 m68k_semi_is_fseek = 1;
246 gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
247 ARG(0), off, ARG(3));
248 } else {
249 off = lseek(ARG(0), off, ARG(3));
250 /* FIXME - handle put_user() failure */
251 put_user_u32(off >> 32, args);
252 put_user_u32(off, args + 4);
253 put_user_u32(errno, args + 8);
254 }
255 return;
256 }
257 case HOSTED_RENAME:
258 if (use_gdb_syscalls()) {
259 gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
260 ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
261 return;
262 } else {
263 p = lock_user_string(ARG(0));
264 q = lock_user_string(ARG(2));
265 if (!p || !q) {
266 /* FIXME - check error code? */
267 result = -1;
268 } else {
269 result = rename(p, q);
270 }
271 unlock_user(p, ARG(0), 0);
272 unlock_user(q, ARG(2), 0);
273 }
274 break;
275 case HOSTED_UNLINK:
276 if (use_gdb_syscalls()) {
277 gdb_do_syscall(m68k_semi_cb, "unlink,%s",
278 ARG(0), (int)ARG(1));
279 return;
280 } else {
281 if (!(p = lock_user_string(ARG(0)))) {
282 /* FIXME - check error code? */
283 result = -1;
284 } else {
285 result = unlink(p);
286 unlock_user(p, ARG(0), 0);
287 }
288 }
289 break;
290 case HOSTED_STAT:
291 if (use_gdb_syscalls()) {
292 gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
293 ARG(0), (int)ARG(1), ARG(2));
294 return;
295 } else {
296 struct stat s;
297 if (!(p = lock_user_string(ARG(0)))) {
298 /* FIXME - check error code? */
299 result = -1;
300 } else {
301 result = stat(p, &s);
302 unlock_user(p, ARG(0), 0);
303 }
304 if (result == 0) {
305 translate_stat(env, ARG(2), &s);
306 }
307 }
308 break;
309 case HOSTED_FSTAT:
310 if (use_gdb_syscalls()) {
311 gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
312 ARG(0), ARG(1));
313 return;
314 } else {
315 struct stat s;
316 result = fstat(ARG(0), &s);
317 if (result == 0) {
318 translate_stat(env, ARG(1), &s);
319 }
320 }
321 break;
322 case HOSTED_GETTIMEOFDAY:
323 if (use_gdb_syscalls()) {
324 gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
325 ARG(0), ARG(1));
326 return;
327 } else {
328 qemu_timeval tv;
329 struct gdb_timeval *p;
330 result = qemu_gettimeofday(&tv);
331 if (result != 0) {
332 if (!(p = lock_user(VERIFY_WRITE,
333 ARG(0), sizeof(struct gdb_timeval), 0))) {
334 /* FIXME - check error code? */
335 result = -1;
336 } else {
337 p->tv_sec = cpu_to_be32(tv.tv_sec);
338 p->tv_usec = cpu_to_be64(tv.tv_usec);
339 unlock_user(p, ARG(0), sizeof(struct gdb_timeval));
340 }
341 }
342 }
343 break;
344 case HOSTED_ISATTY:
345 if (use_gdb_syscalls()) {
346 gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0));
347 return;
348 } else {
349 result = isatty(ARG(0));
350 }
351 break;
352 case HOSTED_SYSTEM:
353 if (use_gdb_syscalls()) {
354 gdb_do_syscall(m68k_semi_cb, "system,%s",
355 ARG(0), (int)ARG(1));
356 return;
357 } else {
358 if (!(p = lock_user_string(ARG(0)))) {
359 /* FIXME - check error code? */
360 result = -1;
361 } else {
362 result = system(p);
363 unlock_user(p, ARG(0), 0);
364 }
365 }
366 break;
367 case HOSTED_INIT_SIM:
368 #if defined(CONFIG_USER_ONLY)
369 {
370 TaskState *ts = env->opaque;
371 /* Allocate the heap using sbrk. */
372 if (!ts->heap_limit) {
373 abi_ulong ret;
374 uint32_t size;
375 uint32_t base;
376
377 base = do_brk(0);
378 size = SEMIHOSTING_HEAP_SIZE;
379 /* Try a big heap, and reduce the size if that fails. */
380 for (;;) {
381 ret = do_brk(base + size);
382 if (ret >= (base + size)) {
383 break;
384 }
385 size >>= 1;
386 }
387 ts->heap_limit = base + size;
388 }
389 /* This call may happen before we have writable memory, so return
390 values directly in registers. */
391 env->dregs[1] = ts->heap_limit;
392 env->aregs[7] = ts->stack_base;
393 }
394 #else
395 /* FIXME: This is wrong for boards where RAM does not start at
396 address zero. */
397 env->dregs[1] = ram_size;
398 env->aregs[7] = ram_size;
399 #endif
400 return;
401 default:
402 cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
403 result = 0;
404 }
405 /* FIXME - handle put_user() failure */
406 put_user_u32(result, args);
407 put_user_u32(errno, args + 4);
408 }