Cleanup mmio coalescing functions
[qemu-kvm/fedora.git] / m68k-semi.c
blob3c76995151d5ce1c66d51f3b0b8c1c8075844905
1 /*
2 * m68k/ColdFire Semihosting syscall interface
4 * Copyright (c) 2005-2007 CodeSourcery.
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.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 * MA 02110-1301, USA.
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <errno.h>
25 #include <fcntl.h>
26 #include <unistd.h>
27 #include <stdlib.h>
28 #include <stdio.h>
29 #include <sys/time.h>
30 #include <time.h>
32 #include "cpu.h"
33 #if defined(CONFIG_USER_ONLY)
34 #include "qemu.h"
35 #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
36 #else
37 #include "qemu-common.h"
38 #include "sysemu.h"
39 #include "gdbstub.h"
40 #include "softmmu-semi.h"
41 #endif
43 #define HOSTED_EXIT 0
44 #define HOSTED_INIT_SIM 1
45 #define HOSTED_OPEN 2
46 #define HOSTED_CLOSE 3
47 #define HOSTED_READ 4
48 #define HOSTED_WRITE 5
49 #define HOSTED_LSEEK 6
50 #define HOSTED_RENAME 7
51 #define HOSTED_UNLINK 8
52 #define HOSTED_STAT 9
53 #define HOSTED_FSTAT 10
54 #define HOSTED_GETTIMEOFDAY 11
55 #define HOSTED_ISATTY 12
56 #define HOSTED_SYSTEM 13
58 typedef uint32_t gdb_mode_t;
59 typedef uint32_t gdb_time_t;
61 struct m68k_gdb_stat {
62 uint32_t gdb_st_dev; /* device */
63 uint32_t gdb_st_ino; /* inode */
64 gdb_mode_t gdb_st_mode; /* protection */
65 uint32_t gdb_st_nlink; /* number of hard links */
66 uint32_t gdb_st_uid; /* user ID of owner */
67 uint32_t gdb_st_gid; /* group ID of owner */
68 uint32_t gdb_st_rdev; /* device type (if inode device) */
69 uint64_t gdb_st_size; /* total size, in bytes */
70 uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
71 uint64_t gdb_st_blocks; /* number of blocks allocated */
72 gdb_time_t gdb_st_atime; /* time of last access */
73 gdb_time_t gdb_st_mtime; /* time of last modification */
74 gdb_time_t gdb_st_ctime; /* time of last change */
75 } __attribute__((packed));
77 struct gdb_timeval {
78 gdb_time_t tv_sec; /* second */
79 uint64_t tv_usec; /* microsecond */
80 } __attribute__((packed));
82 #define GDB_O_RDONLY 0x0
83 #define GDB_O_WRONLY 0x1
84 #define GDB_O_RDWR 0x2
85 #define GDB_O_APPEND 0x8
86 #define GDB_O_CREAT 0x200
87 #define GDB_O_TRUNC 0x400
88 #define GDB_O_EXCL 0x800
90 static int translate_openflags(int flags)
92 int hf;
94 if (flags & GDB_O_WRONLY)
95 hf = O_WRONLY;
96 else if (flags & GDB_O_RDWR)
97 hf = O_RDWR;
98 else
99 hf = O_RDONLY;
101 if (flags & GDB_O_APPEND) hf |= O_APPEND;
102 if (flags & GDB_O_CREAT) hf |= O_CREAT;
103 if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
104 if (flags & GDB_O_EXCL) hf |= O_EXCL;
106 return hf;
109 static void translate_stat(CPUState *env, target_ulong addr, struct stat *s)
111 struct m68k_gdb_stat *p;
113 if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0)))
114 /* FIXME - should this return an error code? */
115 return;
116 p->gdb_st_dev = cpu_to_be32(s->st_dev);
117 p->gdb_st_ino = cpu_to_be32(s->st_ino);
118 p->gdb_st_mode = cpu_to_be32(s->st_mode);
119 p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
120 p->gdb_st_uid = cpu_to_be32(s->st_uid);
121 p->gdb_st_gid = cpu_to_be32(s->st_gid);
122 p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
123 p->gdb_st_size = cpu_to_be64(s->st_size);
124 #ifdef _WIN32
125 /* Windows stat is missing some fields. */
126 p->gdb_st_blksize = 0;
127 p->gdb_st_blocks = 0;
128 #else
129 p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
130 p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
131 #endif
132 p->gdb_st_atime = cpu_to_be32(s->st_atime);
133 p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
134 p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
135 unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
138 static int m68k_semi_is_fseek;
140 static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
142 target_ulong args;
144 args = env->dregs[1];
145 if (m68k_semi_is_fseek) {
146 /* FIXME: We've already lost the high bits of the fseek
147 return value. */
148 /* FIXME - handle put_user() failure */
149 put_user_u32(0, args);
150 args += 4;
151 m68k_semi_is_fseek = 0;
153 /* FIXME - handle put_user() failure */
154 put_user_u32(ret, args);
155 put_user_u32(errno, args + 4);
158 #define ARG(n) \
159 ({ \
160 target_ulong __arg; \
161 /* FIXME - handle get_user() failure */ \
162 get_user_ual(__arg, args + (n) * 4); \
163 __arg; \
165 #define PARG(x) ((unsigned long)ARG(x))
166 void do_m68k_semihosting(CPUM68KState *env, int nr)
168 uint32_t args;
169 void *p;
170 void *q;
171 uint32_t len;
172 uint32_t result;
174 args = env->dregs[1];
175 switch (nr) {
176 case HOSTED_EXIT:
177 exit(env->dregs[0]);
178 case HOSTED_OPEN:
179 if (use_gdb_syscalls()) {
180 gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1),
181 ARG(2), ARG(3));
182 return;
183 } else {
184 if (!(p = lock_user_string(ARG(0)))) {
185 /* FIXME - check error code? */
186 result = -1;
187 } else {
188 result = open(p, translate_openflags(ARG(2)), ARG(3));
189 unlock_user(p, ARG(0), 0);
192 break;
193 case HOSTED_CLOSE:
195 /* Ignore attempts to close stdin/out/err. */
196 int fd = ARG(0);
197 if (fd > 2) {
198 if (use_gdb_syscalls()) {
199 gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0));
200 return;
201 } else {
202 result = close(fd);
204 } else {
205 result = 0;
207 break;
209 case HOSTED_READ:
210 len = ARG(2);
211 if (use_gdb_syscalls()) {
212 gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
213 ARG(0), ARG(1), len);
214 return;
215 } else {
216 if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) {
217 /* FIXME - check error code? */
218 result = -1;
219 } else {
220 result = read(ARG(0), p, len);
221 unlock_user(p, ARG(1), len);
224 break;
225 case HOSTED_WRITE:
226 len = ARG(2);
227 if (use_gdb_syscalls()) {
228 gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
229 ARG(0), ARG(1), len);
230 return;
231 } else {
232 if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) {
233 /* FIXME - check error code? */
234 result = -1;
235 } else {
236 result = write(ARG(0), p, len);
237 unlock_user(p, ARG(0), 0);
240 break;
241 case HOSTED_LSEEK:
243 uint64_t off;
244 off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
245 if (use_gdb_syscalls()) {
246 m68k_semi_is_fseek = 1;
247 gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
248 ARG(0), off, ARG(3));
249 } else {
250 off = lseek(ARG(0), off, ARG(3));
251 /* FIXME - handle put_user() failure */
252 put_user_u32(off >> 32, args);
253 put_user_u32(off, args + 4);
254 put_user_u32(errno, args + 8);
256 return;
258 case HOSTED_RENAME:
259 if (use_gdb_syscalls()) {
260 gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
261 ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
262 return;
263 } else {
264 p = lock_user_string(ARG(0));
265 q = lock_user_string(ARG(2));
266 if (!p || !q) {
267 /* FIXME - check error code? */
268 result = -1;
269 } else {
270 result = rename(p, q);
272 unlock_user(p, ARG(0), 0);
273 unlock_user(q, ARG(2), 0);
275 break;
276 case HOSTED_UNLINK:
277 if (use_gdb_syscalls()) {
278 gdb_do_syscall(m68k_semi_cb, "unlink,%s",
279 ARG(0), (int)ARG(1));
280 return;
281 } else {
282 if (!(p = lock_user_string(ARG(0)))) {
283 /* FIXME - check error code? */
284 result = -1;
285 } else {
286 result = unlink(p);
287 unlock_user(p, ARG(0), 0);
290 break;
291 case HOSTED_STAT:
292 if (use_gdb_syscalls()) {
293 gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
294 ARG(0), (int)ARG(1), ARG(2));
295 return;
296 } else {
297 struct stat s;
298 if (!(p = lock_user_string(ARG(0)))) {
299 /* FIXME - check error code? */
300 result = -1;
301 } else {
302 result = stat(p, &s);
303 unlock_user(p, ARG(0), 0);
305 if (result == 0) {
306 translate_stat(env, ARG(2), &s);
309 break;
310 case HOSTED_FSTAT:
311 if (use_gdb_syscalls()) {
312 gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
313 ARG(0), ARG(1));
314 return;
315 } else {
316 struct stat s;
317 result = fstat(ARG(0), &s);
318 if (result == 0) {
319 translate_stat(env, ARG(1), &s);
322 break;
323 case HOSTED_GETTIMEOFDAY:
324 if (use_gdb_syscalls()) {
325 gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
326 ARG(0), ARG(1));
327 return;
328 } else {
329 qemu_timeval tv;
330 struct gdb_timeval *p;
331 result = qemu_gettimeofday(&tv);
332 if (result != 0) {
333 if (!(p = lock_user(VERIFY_WRITE,
334 ARG(0), sizeof(struct gdb_timeval), 0))) {
335 /* FIXME - check error code? */
336 result = -1;
337 } else {
338 p->tv_sec = cpu_to_be32(tv.tv_sec);
339 p->tv_usec = cpu_to_be64(tv.tv_usec);
340 unlock_user(p, ARG(0), sizeof(struct gdb_timeval));
344 break;
345 case HOSTED_ISATTY:
346 if (use_gdb_syscalls()) {
347 gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0));
348 return;
349 } else {
350 result = isatty(ARG(0));
352 break;
353 case HOSTED_SYSTEM:
354 if (use_gdb_syscalls()) {
355 gdb_do_syscall(m68k_semi_cb, "system,%s",
356 ARG(0), (int)ARG(1));
357 return;
358 } else {
359 if (!(p = lock_user_string(ARG(0)))) {
360 /* FIXME - check error code? */
361 result = -1;
362 } else {
363 result = system(p);
364 unlock_user(p, ARG(0), 0);
367 break;
368 case HOSTED_INIT_SIM:
369 #if defined(CONFIG_USER_ONLY)
371 TaskState *ts = env->opaque;
372 /* Allocate the heap using sbrk. */
373 if (!ts->heap_limit) {
374 long ret;
375 uint32_t size;
376 uint32_t base;
378 base = do_brk(0);
379 size = SEMIHOSTING_HEAP_SIZE;
380 /* Try a big heap, and reduce the size if that fails. */
381 for (;;) {
382 ret = do_brk(base + size);
383 if (ret != -1)
384 break;
385 size >>= 1;
387 ts->heap_limit = base + size;
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;
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;
405 /* FIXME - handle put_user() failure */
406 put_user_u32(result, args);
407 put_user_u32(errno, args + 4);