vl.c 34.8 KB
Newer Older
1
/*
bellard's avatar
bellard committed
2
 * QEMU System Emulator
3
 * 
bellard's avatar
bellard committed
4
 * Copyright (c) 2003-2004 Fabrice Bellard
5
 * 
bellard's avatar
bellard committed
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
23
24
25
 */
#include <stdlib.h>
#include <stdio.h>
bellard's avatar
bellard committed
26
#include <stdarg.h>
27
#include <string.h>
28
#include <ctype.h>
29
30
31
32
33
34
35
36
37
38
39
40
#include <getopt.h>
#include <inttypes.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <malloc.h>
#include <termios.h>
#include <sys/poll.h>
#include <errno.h>
bellard's avatar
bellard committed
41
#include <sys/wait.h>
42
#include <pty.h>
bellard's avatar
bellard committed
43
44
45
46
47

#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/if.h>
#include <linux/if_tun.h>
48
49

#include "disas.h"
bellard's avatar
bellard committed
50
51

#include "vl.h"
52

53
#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
bellard's avatar
bellard committed
54

55
//#define DEBUG_UNUSED_IOPORT
56

57
#if !defined(CONFIG_SOFTMMU)
bellard's avatar
bellard committed
58
#define PHYS_RAM_MAX_SIZE (256 * 1024 * 1024)
59
60
61
#else
#define PHYS_RAM_MAX_SIZE (2047 * 1024 * 1024)
#endif
bellard's avatar
bellard committed
62

63
64
65
#if defined (TARGET_I386)
#elif defined (TARGET_PPC)
//#define USE_OPEN_FIRMWARE
bellard's avatar
bellard committed
66
#if !defined (USE_OPEN_FIRMWARE)
67
68
69
70
71
72
73
#define KERNEL_LOAD_ADDR    0x01000000
#define KERNEL_STACK_ADDR   0x01200000
#else
#define KERNEL_LOAD_ADDR    0x00000000
#define KERNEL_STACK_ADDR   0x00400000
#endif
#endif
74

75
76
#define GUI_REFRESH_INTERVAL 30 

77
78
/* XXX: use a two level table to limit memory usage */
#define MAX_IOPORTS 65536
79

bellard's avatar
bellard committed
80
const char *bios_dir = CONFIG_QEMU_SHAREDIR;
81
char phys_ram_file[1024];
82
83
CPUState *global_env;
CPUState *cpu_single_env;
84
void *ioport_opaque[MAX_IOPORTS];
bellard's avatar
bellard committed
85
86
IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
87
BlockDriverState *bs_table[MAX_DISKS], *fd_table[MAX_FD];
88
89
int vga_ram_size;
static DisplayState display_state;
90
int nographic;
91
92
int term_inited;
int64_t ticks_per_sec;
93
int boot_device = 'c';
94
static int ram_size;
bellard's avatar
bellard committed
95
96
static char network_script[1024];
int pit_min_timer_count = 0;
97
98
99
int nb_nics;
NetDriverState nd_table[MAX_NICS];
SerialState *serial_console;
100
101
102
103

/***********************************************************/
/* x86 io ports */

104
uint32_t default_ioport_readb(void *opaque, uint32_t address)
105
106
107
108
{
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "inb: port=0x%04x\n", address);
#endif
bellard's avatar
bellard committed
109
    return 0xff;
110
111
}

112
void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)
113
114
115
116
117
118
119
{
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "outb: port=0x%04x data=0x%02x\n", address, data);
#endif
}

/* default is to make two byte accesses */
120
uint32_t default_ioport_readw(void *opaque, uint32_t address)
121
122
{
    uint32_t data;
123
124
    data = ioport_read_table[0][address & (MAX_IOPORTS - 1)](opaque, address);
    data |= ioport_read_table[0][(address + 1) & (MAX_IOPORTS - 1)](opaque, address + 1) << 8;
125
126
127
    return data;
}

128
void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)
129
{
130
131
    ioport_write_table[0][address & (MAX_IOPORTS - 1)](opaque, address, data & 0xff);
    ioport_write_table[0][(address + 1) & (MAX_IOPORTS - 1)](opaque, address + 1, (data >> 8) & 0xff);
132
133
}

134
uint32_t default_ioport_readl(void *opaque, uint32_t address)
135
{
bellard's avatar
bellard committed
136
137
138
139
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "inl: port=0x%04x\n", address);
#endif
    return 0xffffffff;
140
141
}

142
void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)
143
{
bellard's avatar
bellard committed
144
145
146
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "outl: port=0x%04x data=0x%02x\n", address, data);
#endif
147
148
}

bellard's avatar
bellard committed
149
void init_ioports(void)
150
151
152
{
    int i;

bellard's avatar
bellard committed
153
154
155
156
157
158
159
160
    for(i = 0; i < MAX_IOPORTS; i++) {
        ioport_read_table[0][i] = default_ioport_readb;
        ioport_write_table[0][i] = default_ioport_writeb;
        ioport_read_table[1][i] = default_ioport_readw;
        ioport_write_table[1][i] = default_ioport_writew;
        ioport_read_table[2][i] = default_ioport_readl;
        ioport_write_table[2][i] = default_ioport_writel;
    }
161
162
}

bellard's avatar
bellard committed
163
/* size is the word size in byte */
164
165
int register_ioport_read(int start, int length, int size, 
                         IOPortReadFunc *func, void *opaque)
bellard's avatar
bellard committed
166
{
bellard's avatar
bellard committed
167
    int i, bsize;
bellard's avatar
bellard committed
168

169
    if (size == 1) {
bellard's avatar
bellard committed
170
        bsize = 0;
171
    } else if (size == 2) {
bellard's avatar
bellard committed
172
        bsize = 1;
173
    } else if (size == 4) {
bellard's avatar
bellard committed
174
        bsize = 2;
175
176
    } else {
        hw_error("register_ioport_read: invalid size");
bellard's avatar
bellard committed
177
        return -1;
178
179
    }
    for(i = start; i < start + length; i += size) {
bellard's avatar
bellard committed
180
        ioport_read_table[bsize][i] = func;
181
182
183
184
        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
            hw_error("register_ioport_read: invalid opaque");
        ioport_opaque[i] = opaque;
    }
bellard's avatar
bellard committed
185
186
187
    return 0;
}

bellard's avatar
bellard committed
188
/* size is the word size in byte */
189
190
int register_ioport_write(int start, int length, int size, 
                          IOPortWriteFunc *func, void *opaque)
bellard's avatar
bellard committed
191
{
bellard's avatar
bellard committed
192
    int i, bsize;
bellard's avatar
bellard committed
193

194
    if (size == 1) {
bellard's avatar
bellard committed
195
        bsize = 0;
196
    } else if (size == 2) {
bellard's avatar
bellard committed
197
        bsize = 1;
198
    } else if (size == 4) {
bellard's avatar
bellard committed
199
        bsize = 2;
200
201
    } else {
        hw_error("register_ioport_write: invalid size");
bellard's avatar
bellard committed
202
        return -1;
203
204
    }
    for(i = start; i < start + length; i += size) {
bellard's avatar
bellard committed
205
        ioport_write_table[bsize][i] = func;
206
207
208
209
        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
            hw_error("register_ioport_read: invalid opaque");
        ioport_opaque[i] = opaque;
    }
bellard's avatar
bellard committed
210
211
212
    return 0;
}

213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
void pstrcpy(char *buf, int buf_size, const char *str)
{
    int c;
    char *q = buf;

    if (buf_size <= 0)
        return;

    for(;;) {
        c = *str++;
        if (c == 0 || q >= buf + buf_size - 1)
            break;
        *q++ = c;
    }
    *q = '\0';
}

/* strcat and truncate. */
char *pstrcat(char *buf, int buf_size, const char *s)
{
    int len;
    len = strlen(buf);
    if (len < buf_size) 
        pstrcpy(buf + len, buf_size - len, s);
    return buf;
}

/* return the size or -1 if error */
int load_image(const char *filename, uint8_t *addr)
{
    int fd, size;
    fd = open(filename, O_RDONLY);
    if (fd < 0)
        return -1;
    size = lseek(fd, 0, SEEK_END);
    lseek(fd, 0, SEEK_SET);
    if (read(fd, addr, size) != size) {
        close(fd);
        return -1;
    }
    close(fd);
    return size;
}

257
void cpu_outb(CPUState *env, int addr, int val)
258
{
259
260
    addr &= (MAX_IOPORTS - 1);
    ioport_write_table[0][addr](ioport_opaque[addr], addr, val);
261
262
}

263
void cpu_outw(CPUState *env, int addr, int val)
264
{
265
266
    addr &= (MAX_IOPORTS - 1);
    ioport_write_table[1][addr](ioport_opaque[addr], addr, val);
267
268
}

269
void cpu_outl(CPUState *env, int addr, int val)
270
{
271
272
    addr &= (MAX_IOPORTS - 1);
    ioport_write_table[2][addr](ioport_opaque[addr], addr, val);
273
274
}

275
int cpu_inb(CPUState *env, int addr)
276
{
277
278
    addr &= (MAX_IOPORTS - 1);
    return ioport_read_table[0][addr](ioport_opaque[addr], addr);
279
280
}

281
int cpu_inw(CPUState *env, int addr)
282
{
283
284
    addr &= (MAX_IOPORTS - 1);
    return ioport_read_table[1][addr](ioport_opaque[addr], addr);
285
286
}

287
int cpu_inl(CPUState *env, int addr)
288
{
289
290
    addr &= (MAX_IOPORTS - 1);
    return ioport_read_table[2][addr](ioport_opaque[addr], addr);
291
292
293
294
295
296
297
298
299
300
301
302
303
}

/***********************************************************/
void hw_error(const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    fprintf(stderr, "qemu: hardware error: ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
#ifdef TARGET_I386
    cpu_x86_dump_state(global_env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP);
304
305
#else
    cpu_dump_state(global_env, stderr, 0);
306
307
308
309
310
#endif
    va_end(ap);
    abort();
}

311
312
313
#if defined(__powerpc__)

static inline uint32_t get_tbl(void) 
314
{
315
316
317
    uint32_t tbl;
    asm volatile("mftb %0" : "=r" (tbl));
    return tbl;
318
319
}

320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
static inline uint32_t get_tbu(void) 
{
	uint32_t tbl;
	asm volatile("mftbu %0" : "=r" (tbl));
	return tbl;
}

int64_t cpu_get_real_ticks(void)
{
    uint32_t l, h, h1;
    /* NOTE: we test if wrapping has occurred */
    do {
        h = get_tbu();
        l = get_tbl();
        h1 = get_tbu();
    } while (h != h1);
    return ((int64_t)h << 32) | l;
}

#elif defined(__i386__)

int64_t cpu_get_real_ticks(void)
342
343
344
345
346
347
{
    int64_t val;
    asm("rdtsc" : "=A" (val));
    return val;
}

348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
#else
#error unsupported CPU
#endif

static int64_t cpu_ticks_offset;
static int64_t cpu_ticks_last;

int64_t cpu_get_ticks(void)
{
    return cpu_get_real_ticks() + cpu_ticks_offset;
}

/* enable cpu_get_ticks() */
void cpu_enable_ticks(void)
{
    cpu_ticks_offset = cpu_ticks_last - cpu_get_real_ticks();
}

/* disable cpu_get_ticks() : the clock is stopped. You must not call
   cpu_get_ticks() after that.  */
void cpu_disable_ticks(void)
{
    cpu_ticks_last = cpu_get_ticks();
}

int64_t get_clock(void)
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec * 1000000LL + tv.tv_usec;
}

380
381
382
383
384
385
386
387
388
389
390
391
void cpu_calibrate_ticks(void)
{
    int64_t usec, ticks;

    usec = get_clock();
    ticks = cpu_get_ticks();
    usleep(50 * 1000);
    usec = get_clock() - usec;
    ticks = cpu_get_ticks() - ticks;
    ticks_per_sec = (ticks * 1000000LL + (usec >> 1)) / usec;
}

392
/* compute with 96 bit intermediate result: (a*b)/c */
bellard's avatar
bellard committed
393
uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
{
    union {
        uint64_t ll;
        struct {
#ifdef WORDS_BIGENDIAN
            uint32_t high, low;
#else
            uint32_t low, high;
#endif            
        } l;
    } u, res;
    uint64_t rl, rh;

    u.ll = a;
    rl = (uint64_t)u.l.low * (uint64_t)b;
    rh = (uint64_t)u.l.high * (uint64_t)b;
    rh += (rl >> 32);
    res.l.high = rh / c;
    res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
    return res.ll;
}

416
417
/***********************************************************/
/* serial device */
418

419
int serial_open_device(void)
420
{
421
422
    char slave_name[1024];
    int master_fd, slave_fd;
423

424
425
426
    if (serial_console == NULL && nographic) {
        /* use console for serial port */
        return 0;
bellard's avatar
bellard committed
427
    } else {
428
429
430
431
432
433
        if (openpty(&master_fd, &slave_fd, slave_name, NULL, NULL) < 0) {
            fprintf(stderr, "warning: could not create pseudo terminal for serial port\n");
            return -1;
        }
        fprintf(stderr, "Serial port redirected to %s\n", slave_name);
        return master_fd;
434
435
436
    }
}

bellard's avatar
bellard committed
437
438
/***********************************************************/
/* Linux network device redirector */
439

440
static int tun_open(char *ifname, int ifname_size)
441
{
bellard's avatar
bellard committed
442
    struct ifreq ifr;
443
    int fd, ret;
bellard's avatar
bellard committed
444
445
446
447
448
    
    fd = open("/dev/net/tun", O_RDWR);
    if (fd < 0) {
        fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
        return -1;
449
    }
bellard's avatar
bellard committed
450
451
452
453
454
455
456
457
458
459
    memset(&ifr, 0, sizeof(ifr));
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
    pstrcpy(ifr.ifr_name, IFNAMSIZ, "tun%d");
    ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
    if (ret != 0) {
        fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
        close(fd);
        return -1;
    }
    printf("Connected to host network interface: %s\n", ifr.ifr_name);
460
    pstrcpy(ifname, ifname_size, ifr.ifr_name);
bellard's avatar
bellard committed
461
    fcntl(fd, F_SETFL, O_NONBLOCK);
462
463
    return fd;
}
464

465
466
467
468
469
470
471
472
473
474
475
476
477
478
static int net_init(void)
{
    int pid, status, launch_script, i;
    NetDriverState *nd;
    char *args[MAX_NICS + 2];
    char **parg;

    launch_script = 0;
    for(i = 0; i < nb_nics; i++) {
        nd = &nd_table[i];
        if (nd->fd < 0) {
            nd->fd = tun_open(nd->ifname, sizeof(nd->ifname));
            if (nd->fd >= 0) 
                launch_script = 1;
bellard's avatar
bellard committed
479
        }
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
    }

    if (launch_script) {
        /* try to launch network init script */
        pid = fork();
        if (pid >= 0) {
            if (pid == 0) {
                parg = args;
                *parg++ = network_script;
                for(i = 0; i < nb_nics; i++) {
                    nd = &nd_table[i];
                    if (nd->fd >= 0) {
                        *parg++ = nd->ifname;
                    }
                }
                *parg++ = NULL;
                execv(network_script, args);
                exit(1);
            }
            while (waitpid(pid, &status, 0) != pid);
            if (!WIFEXITED(status) ||
                WEXITSTATUS(status) != 0) {
                fprintf(stderr, "%s: could not launch network script\n",
                        network_script);
            }
bellard's avatar
bellard committed
505
        }
506
    }
bellard's avatar
bellard committed
507
    return 0;
508
509
}

510
void net_send_packet(NetDriverState *nd, const uint8_t *buf, int size)
511
{
bellard's avatar
bellard committed
512
513
#ifdef DEBUG_NE2000
    printf("NE2000: sending packet size=%d\n", size);
514
#endif
515
    write(nd->fd, buf, size);
bellard's avatar
bellard committed
516
}
517

518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
/***********************************************************/
/* dumb display */

/* init terminal so that we can grab keys */
static struct termios oldtty;

static void term_exit(void)
{
    tcsetattr (0, TCSANOW, &oldtty);
}

static void term_init(void)
{
    struct termios tty;

    tcgetattr (0, &tty);
    oldtty = tty;

    tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
                          |INLCR|IGNCR|ICRNL|IXON);
    tty.c_oflag |= OPOST;
539
540
541
542
    tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
    /* if graphical mode, we allow Ctrl-C handling */
    if (nographic)
        tty.c_lflag &= ~ISIG;
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
    tty.c_cflag &= ~(CSIZE|PARENB);
    tty.c_cflag |= CS8;
    tty.c_cc[VMIN] = 1;
    tty.c_cc[VTIME] = 0;
    
    tcsetattr (0, TCSANOW, &tty);

    atexit(term_exit);

    fcntl(0, F_SETFL, O_NONBLOCK);
}

static void dumb_update(DisplayState *ds, int x, int y, int w, int h)
{
}

static void dumb_resize(DisplayState *ds, int w, int h)
{
}

static void dumb_refresh(DisplayState *ds)
{
    vga_update_display();
}

void dumb_display_init(DisplayState *ds)
{
    ds->data = NULL;
    ds->linesize = 0;
    ds->depth = 0;
    ds->dpy_update = dumb_update;
    ds->dpy_resize = dumb_resize;
    ds->dpy_refresh = dumb_refresh;
}

578
#if !defined(CONFIG_SOFTMMU)
bellard's avatar
bellard committed
579
/***********************************************************/
580
581
582
583
584
585
586
587
588
/* cpu signal handler */
static void host_segv_handler(int host_signum, siginfo_t *info, 
                              void *puc)
{
    if (cpu_signal_handler(host_signum, info, puc))
        return;
    term_exit();
    abort();
}
589
#endif
590
591

static int timer_irq_pending;
592
static int timer_irq_count;
593

594
595
596
static int timer_ms;
static int gui_refresh_pending, gui_refresh_count;

597
598
599
static void host_alarm_handler(int host_signum, siginfo_t *info, 
                               void *puc)
{
600
601
602
603
604
605
606
607
    /* NOTE: since usually the OS asks a 100 Hz clock, there can be
       some drift between cpu_get_ticks() and the interrupt time. So
       we queue some interrupts to avoid missing some */
    timer_irq_count += pit_get_out_edges(&pit_channels[0]);
    if (timer_irq_count) {
        if (timer_irq_count > 2)
            timer_irq_count = 2;
        timer_irq_count--;
608
609
610
611
612
613
614
615
616
        timer_irq_pending = 1;
    }
    gui_refresh_count += timer_ms;
    if (gui_refresh_count >= GUI_REFRESH_INTERVAL) {
        gui_refresh_count = 0;
        gui_refresh_pending = 1;
    }

    if (gui_refresh_pending || timer_irq_pending) {
617
        /* just exit from the cpu to have a chance to handle timers */
618
        cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
619
    }
620
621
}

622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
#define MAX_IO_HANDLERS 64

typedef struct IOHandlerRecord {
    int fd;
    IOCanRWHandler *fd_can_read;
    IOReadHandler *fd_read;
    void *opaque;
    /* temporary data */
    struct pollfd *ufd;
    int max_size;
} IOHandlerRecord;

static IOHandlerRecord io_handlers[MAX_IO_HANDLERS];
static int nb_io_handlers = 0;

int add_fd_read_handler(int fd, IOCanRWHandler *fd_can_read, 
                        IOReadHandler *fd_read, void *opaque)
{
    IOHandlerRecord *ioh;

    if (nb_io_handlers >= MAX_IO_HANDLERS)
        return -1;
    ioh = &io_handlers[nb_io_handlers];
    ioh->fd = fd;
    ioh->fd_can_read = fd_can_read;
    ioh->fd_read = fd_read;
    ioh->opaque = opaque;
    nb_io_handlers++;
    return 0;
}

bellard's avatar
bellard committed
653
654
655
656
657
658
659
/* main execution loop */

CPUState *cpu_gdbstub_get_env(void *opaque)
{
    return global_env;
}

bellard's avatar
bellard committed
660
int main_loop(void *opaque)
bellard's avatar
bellard committed
661
{
662
663
664
665
    struct pollfd ufds[MAX_IO_HANDLERS + 1], *pf, *gdb_ufd;
    int ret, n, timeout, serial_ok, max_size, i;
    uint8_t buf[4096];
    IOHandlerRecord *ioh;
bellard's avatar
bellard committed
666
667
    CPUState *env = global_env;

668
    if (!term_inited) {
669
670
671
672
673
674
675
        /* initialize terminal only there so that the user has a
           chance to stop QEMU with Ctrl-C before the gdb connection
           is launched */
        term_inited = 1;
        term_init();
    }

676
    serial_ok = 1;
677
    cpu_enable_ticks();
bellard's avatar
bellard committed
678
    for(;;) {
679
680
681
682
#if defined (DO_TB_FLUSH)
        tb_flush();
#endif
        ret = cpu_exec(env);
683
684
        if (reset_requested) {
            ret = EXCP_INTERRUPT; 
685
            break;
686
687
688
689
690
        }
        if (ret == EXCP_DEBUG) {
            ret = EXCP_DEBUG;
            break;
        }
bellard's avatar
bellard committed
691
692
693
694
695
        /* if hlt instruction, we wait until the next IRQ */
        if (ret == EXCP_HLT) 
            timeout = 10;
        else
            timeout = 0;
696

bellard's avatar
bellard committed
697
698
        /* poll any events */
        pf = ufds;
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
        ioh = io_handlers;
        for(i = 0; i < nb_io_handlers; i++) {
            max_size = ioh->fd_can_read(ioh->opaque);
            if (max_size > 0) {
                if (max_size > sizeof(buf))
                    max_size = sizeof(buf);
                pf->fd = ioh->fd;
                pf->events = POLLIN;
                ioh->ufd = pf;
                pf++;
            } else {
                ioh->ufd = NULL;
            }
            ioh->max_size = max_size;
            ioh++;
bellard's avatar
bellard committed
714
        }
715

bellard's avatar
bellard committed
716
717
718
719
720
721
722
723
724
725
        gdb_ufd = NULL;
        if (gdbstub_fd > 0) {
            gdb_ufd = pf;
            pf->fd = gdbstub_fd;
            pf->events = POLLIN;
            pf++;
        }

        ret = poll(ufds, pf - ufds, timeout);
        if (ret > 0) {
726
727
728
729
730
731
732
            ioh = io_handlers;
            for(i = 0; i < nb_io_handlers; i++) {
                pf = ioh->ufd;
                if (pf) {
                    n = read(ioh->fd, buf, ioh->max_size);
                    if (n > 0) {
                        ioh->fd_read(ioh->opaque, buf, n);
bellard's avatar
bellard committed
733
734
                    }
                }
735
                ioh++;
bellard's avatar
bellard committed
736
737
738
739
740
            }
            if (gdb_ufd && (gdb_ufd->revents & POLLIN)) {
                uint8_t buf[1];
                /* stop emulation if requested by gdb */
                n = read(gdbstub_fd, buf, 1);
741
742
                if (n == 1) {
                    ret = EXCP_INTERRUPT; 
bellard's avatar
bellard committed
743
                    break;
744
                }
bellard's avatar
bellard committed
745
746
747
748
749
            }
        }

        /* timer IRQ */
        if (timer_irq_pending) {
750
#if defined (TARGET_I386)
bellard's avatar
bellard committed
751
752
753
            pic_set_irq(0, 1);
            pic_set_irq(0, 0);
            timer_irq_pending = 0;
bellard's avatar
bellard committed
754
            rtc_timer();
755
#endif
bellard's avatar
bellard committed
756
        }
757
758
759
760
761
        /* XXX: add explicit timer */
        SB16_run();

        /* run dma transfers, if any */
        DMA_run();
762
763
764
765
766
767

        /* VGA */
        if (gui_refresh_pending) {
            display_state.dpy_refresh(&display_state);
            gui_refresh_pending = 0;
        }
bellard's avatar
bellard committed
768
    }
769
770
    cpu_disable_ticks();
    return ret;
bellard's avatar
bellard committed
771
772
}

773
774
void help(void)
{
775
    printf("QEMU PC emulator version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
776
           "usage: %s [options] [disk_image]\n"
777
           "\n"
778
           "'disk_image' is a raw hard image image for IDE hard disk 0\n"
bellard's avatar
bellard committed
779
           "\n"
780
           "Standard options:\n"
781
           "-fda/-fdb file  use 'file' as floppy disk 0/1 image\n"
782
783
           "-hda/-hdb file  use 'file' as IDE hard disk 0/1 image\n"
           "-hdc/-hdd file  use 'file' as IDE hard disk 2/3 image\n"
784
           "-cdrom file     use 'file' as IDE cdrom image (cdrom is ide1 master)\n"
785
           "-boot [a|b|c|d] boot on floppy (a, b), hard disk (c) or CD-ROM (d)\n"
786
787
	   "-snapshot       write to temporary files instead of disk image files\n"
           "-m megs         set virtual RAM size to megs MB\n"
788
789
790
           "-nographic      disable graphical output and redirect serial I/Os to console\n"
           "\n"
           "Network options:\n"
791
           "-n script       set network init script [default=%s]\n"
792
793
           "-nics n         simulate 'n' network interfaces [default=1]\n"
           "-tun-fd fd0[,...] use these fds as already opened tap/tun interfaces\n"
794
           "\n"
795
           "Linux boot specific:\n"
796
797
798
           "-kernel bzImage use 'bzImage' as kernel image\n"
           "-append cmdline use 'cmdline' as kernel command line\n"
           "-initrd file    use 'file' as initial ram disk\n"
bellard's avatar
bellard committed
799
           "\n"
800
           "Debug/Expert options:\n"
801
802
           "-s              wait gdb connection to port %d\n"
           "-p port         change gdb connection port\n"
803
           "-d item1,...    output log to %s (use -d ? for a list of log items)\n"
804
805
           "-hdachs c,h,s   force hard disk 0 geometry (usually qemu can guess it)\n"
           "-L path         set the directory for the BIOS and VGA BIOS\n"
806
807
808
809
#ifdef USE_CODE_COPY
           "-no-code-copy   disable code copy acceleration\n"
#endif

810
           "\n"
bellard's avatar
bellard committed
811
           "During emulation, use C-a h to get terminal commands:\n",
812
813
814
815
816
817
#ifdef CONFIG_SOFTMMU
           "qemu",
#else
           "qemu-fast",
#endif
           DEFAULT_NETWORK_SCRIPT, 
818
819
           DEFAULT_GDBSTUB_PORT,
           "/tmp/qemu.log");
820
    term_print_help();
821
822
823
824
825
826
#ifndef CONFIG_SOFTMMU
    printf("\n"
           "NOTE: this version of QEMU is faster but it needs slightly patched OSes to\n"
           "work. Please use the 'qemu' executable to have a more accurate (but slower)\n"
           "PC emulation.\n");
#endif
827
828
829
    exit(1);
}

bellard's avatar
bellard committed
830
831
832
833
struct option long_options[] = {
    { "initrd", 1, NULL, 0, },
    { "hda", 1, NULL, 0, },
    { "hdb", 1, NULL, 0, },
834
    { "snapshot", 0, NULL, 0, },
835
    { "hdachs", 1, NULL, 0, },
836
837
838
    { "nographic", 0, NULL, 0, },
    { "kernel", 1, NULL, 0, },
    { "append", 1, NULL, 0, },
839
    { "tun-fd", 1, NULL, 0, },
840
841
842
843
    { "hdc", 1, NULL, 0, },
    { "hdd", 1, NULL, 0, },
    { "cdrom", 1, NULL, 0, },
    { "boot", 1, NULL, 0, },
844
845
    { "fda", 1, NULL, 0, },
    { "fdb", 1, NULL, 0, },
846
847
    { "no-code-copy", 0, NULL, 0 },
    { "nics", 1, NULL, 0 },
bellard's avatar
bellard committed
848
849
850
    { NULL, 0, NULL, 0 },
};

851
852
853
#ifdef CONFIG_SDL
/* SDL use the pthreads and they modify sigaction. We don't
   want that. */
854
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
855
856
857
858
859
860
861
862
extern void __libc_sigaction();
#define sigaction(sig, act, oact) __libc_sigaction(sig, act, oact)
#else
extern void __sigaction();
#define sigaction(sig, act, oact) __sigaction(sig, act, oact)
#endif
#endif /* CONFIG_SDL */

863
864
865
866
867
868
869
870
871
#if defined (TARGET_I386) && defined(USE_CODE_COPY)

/* this stack is only used during signal handling */
#define SIGNAL_STACK_SIZE 32768

static uint8_t *signal_stack;

#endif

872
873
int main(int argc, char **argv)
{
874
    int c, i, use_gdbstub, gdbstub_port, long_index, has_cdrom;
875
    int snapshot, linux_boot;
876
877
    struct sigaction act;
    struct itimerval itv;
878
    CPUState *env;
bellard's avatar
bellard committed
879
    const char *initrd_filename;
880
    const char *hd_filename[MAX_DISKS], *fd_filename[MAX_FD];
881
    const char *kernel_filename, *kernel_cmdline;
882
    DisplayState *ds = &display_state;
883
    int cyls, heads, secs;
884

885
886
    /* we never want that malloc() uses mmap() */
    mallopt(M_MMAP_THRESHOLD, 4096 * 1024);
bellard's avatar
bellard committed
887
    initrd_filename = NULL;
888
889
    for(i = 0; i < MAX_FD; i++)
        fd_filename[i] = NULL;
bellard's avatar
bellard committed
890
891
    for(i = 0; i < MAX_DISKS; i++)
        hd_filename[i] = NULL;
892
    ram_size = 32 * 1024 * 1024;
893
    vga_ram_size = VGA_RAM_SIZE;
bellard's avatar
bellard committed
894
    pstrcpy(network_script, sizeof(network_script), DEFAULT_NETWORK_SCRIPT);
bellard's avatar
bellard committed
895
896
    use_gdbstub = 0;
    gdbstub_port = DEFAULT_GDBSTUB_PORT;
897
    snapshot = 0;
898
899
900
    nographic = 0;
    kernel_filename = NULL;
    kernel_cmdline = "";
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
    has_cdrom = 1;
    cyls = heads = secs = 0;

    nb_nics = 1;
    for(i = 0; i < MAX_NICS; i++) {
        NetDriverState *nd = &nd_table[i];
        nd->fd = -1;
        /* init virtual mac address */
        nd->macaddr[0] = 0x52;
        nd->macaddr[1] = 0x54;
        nd->macaddr[2] = 0x00;
        nd->macaddr[3] = 0x12;
        nd->macaddr[4] = 0x34;
        nd->macaddr[5] = 0x56 + i;
    }
    
917
    for(;;) {
918
        c = getopt_long_only(argc, argv, "hm:d:n:sp:L:", long_options, &long_index);
919
920
921
        if (c == -1)
            break;
        switch(c) {
bellard's avatar
bellard committed
922
923
924
925
926
927
928
929
930
931
932
        case 0:
            switch(long_index) {
            case 0:
                initrd_filename = optarg;
                break;
            case 1:
                hd_filename[0] = optarg;
                break;
            case 2:
                hd_filename[1] = optarg;
                break;
933
934
935
            case 3:
                snapshot = 1;
                break;
936
937
938
939
940
941
942
943
944
945
946
947
948
            case 4:
                {
                    const char *p;
                    p = optarg;
                    cyls = strtol(p, (char **)&p, 0);
                    if (*p != ',')
                        goto chs_fail;
                    p++;
                    heads = strtol(p, (char **)&p, 0);
                    if (*p != ',')
                        goto chs_fail;
                    p++;
                    secs = strtol(p, (char **)&p, 0);
949
950
951
952
                    if (*p != '\0') {
                    chs_fail:
                        cyls = 0;
                    }
953
954
                }
                break;
955
            case 5:
956
957
958
959
960
961
962
                nographic = 1;
                break;
            case 6:
                kernel_filename = optarg;
                break;
            case 7:
                kernel_cmdline = optarg;
963
                break;
964
	    case 8:
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
                {
                    const char *p;
                    int fd;
                    p = optarg;
                    nb_nics = 0;
                    for(;;) {
                        fd = strtol(p, (char **)&p, 0);
                        nd_table[nb_nics].fd = fd;
                        snprintf(nd_table[nb_nics].ifname, 
                                 sizeof(nd_table[nb_nics].ifname),
                                 "fd%d", nb_nics);
                        nb_nics++;
                        if (*p == ',') {
                            p++;
                        } else if (*p != '\0') {
                            fprintf(stderr, "qemu: invalid fd for network interface %d\n", nb_nics);
                            exit(1);
bellard's avatar
bellard committed
982
983
                        } else {
                            break;
984
985
986
                        }
                    }
                }
987
		break;
988
989
            case 9:
                hd_filename[2] = optarg;
990
                has_cdrom = 0;
991
992
993
994
995
996
                break;
            case 10:
                hd_filename[3] = optarg;
                break;
            case 11:
                hd_filename[2] = optarg;
997
                has_cdrom = 1;
998
999
1000
                break;
            case 12:
                boot_device = optarg[0];
1001
1002
                if (boot_device != 'a' && boot_device != 'b' &&
                    boot_device != 'c' && boot_device != 'd') {
1003
1004
1005
1006
                    fprintf(stderr, "qemu: invalid boot device '%c'\n", boot_device);
                    exit(1);
                }
                break;
1007
1008
1009
1010
1011
1012
            case 13:
                fd_filename[0] = optarg;
                break;
            case 14:
                fd_filename[1] = optarg;
                break;
1013
1014
1015
            case 15:
                code_copy_enabled = 0;
                break;
1016
1017
1018
1019
1020
1021
1022
            case 16:
                nb_nics = atoi(optarg);
                if (nb_nics < 1 || nb_nics > MAX_NICS) {
                    fprintf(stderr, "qemu: invalid number of network interfaces\n");
                    exit(1);
                }
                break;
bellard's avatar
bellard committed
1023
1024
            }
            break;
1025
1026
1027
1028
        case 'h':
            help();
            break;
        case 'm':
1029
1030
            ram_size = atoi(optarg) * 1024 * 1024;
            if (ram_size <= 0)
1031
                help();
1032
            if (ram_size > PHYS_RAM_MAX_SIZE) {
1033
                fprintf(stderr, "qemu: at most %d MB RAM can be simulated\n",
bellard's avatar
bellard committed
1034
1035
1036
                        PHYS_RAM_MAX_SIZE / (1024 * 1024));
                exit(1);
            }
1037
1038
            break;
        case 'd':
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
            {
                int mask;
                CPULogItem *item;

                mask = cpu_str_to_log_mask(optarg);
                if (!mask) {
                    printf("Log items (comma separated):\n");
                    for(item = cpu_log_items; item->mask != 0; item++) {
                        printf("%-10s %s\n", item->name, item->help);
                    }
                    exit(1);
                }
                cpu_set_log(mask);
            }
1053
            break;
bellard's avatar
bellard committed
1054
1055
1056
        case 'n':
            pstrcpy(network_script, sizeof(network_script), optarg);
            break;
bellard's avatar
bellard committed
1057
1058
1059
1060
1061
1062
        case 's':
            use_gdbstub = 1;
            break;
        case 'p':
            gdbstub_port = atoi(optarg);
            break;
1063
        case 'L':
1064
            bios_dir = optarg;
1065
            break;
1066
1067
        }
    }
1068

1069
1070
1071
1072
1073
    if (optind < argc) {
        hd_filename[0] = argv[optind++];
    }

    linux_boot = (kernel_filename != NULL);
1074
        
1075
1076
    if (!linux_boot && hd_filename[0] == '\0' && hd_filename[2] == '\0' &&
        fd_filename[0] == '\0')
1077
        help();
1078
1079
    
    /* boot to cd by default if no hard disk */
bellard's avatar
bellard committed
1080
1081
1082
1083
1084
1085
    if (hd_filename[0] == '\0' && boot_device == 'c') {
        if (fd_filename[0] != '\0')
            boot_device = 'a';
        else
            boot_device = 'd';
    }
1086

1087
1088
1089
1090
1091
1092
1093
#if !defined(CONFIG_SOFTMMU)
    /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
    {
        static uint8_t stdout_buf[4096];
        setvbuf(stdout, stdout_buf, _IOLBF, sizeof(stdout_buf));
    }
#else
bellard's avatar
bellard committed
1094
    setvbuf(stdout, NULL, _IOLBF, 0);
1095
#endif
1096

1097
1098
    /* init host network redirectors */
    net_init();
bellard's avatar
bellard committed
1099

1100
    /* init the memory */
1101
    phys_ram_size = ram_size + vga_ram_size;
bellard's avatar
bellard committed
1102
1103

#ifdef CONFIG_SOFTMMU
1104
    phys_ram_base = memalign(TARGET_PAGE_SIZE, phys_ram_size);
bellard's avatar
bellard committed
1105
1106
    if (!phys_ram_base) {
        fprintf(stderr, "Could not allocate physical memory\n");
1107
1108
        exit(1);
    }
bellard's avatar
bellard committed
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
#else
    /* as we must map the same page at several addresses, we must use
       a fd */
    {
        const char *tmpdir;

        tmpdir = getenv("QEMU_TMPDIR");
        if (!tmpdir)
            tmpdir = "/tmp";
        snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/vlXXXXXX", tmpdir);
        if (mkstemp(phys_ram_file) < 0) {
            fprintf(stderr, "Could not create temporary memory file '%s'\n", 
                    phys_ram_file);
            exit(1);
        }
        phys_ram_fd = open(phys_ram_file, O_CREAT | O_TRUNC | O_RDWR, 0600);
        if (phys_ram_fd < 0) {
            fprintf(stderr, "Could not open temporary memory file '%s'\n", 
                    phys_ram_file);
            exit(1);
        }
1130
        ftruncate(phys_ram_fd, phys_ram_size);
bellard's avatar
bellard committed
1131
        unlink(phys_ram_file);
1132
1133
        phys_ram_base = mmap(get_mmap_addr(phys_ram_size), 
                             phys_ram_size, 
bellard's avatar
bellard committed
1134
1135
1136
1137
1138
1139
1140
1141
                             PROT_WRITE | PROT_READ, MAP_SHARED | MAP_FIXED, 
                             phys_ram_fd, 0);
        if (phys_ram_base == MAP_FAILED) {
            fprintf(stderr, "Could not map physical memory\n");
            exit(1);
        }
    }
#endif
1142

1143
1144
1145
1146
1147
1148
    /* we always create the cdrom drive, even if no disk is there */
    if (has_cdrom) {
        bs_table[2] = bdrv_new("cdrom");
        bdrv_set_type_hint(bs_table[2], BDRV_TYPE_CDROM);
    }

1149
1150
1151
1152
    /* open the virtual block devices */
    for(i = 0; i < MAX_DISKS; i++) {
        if (hd_filename[i]) {
            if (!bs_table[i]) {
1153
1154
1155
1156
1157
                char buf[64];
                snprintf(buf, sizeof(buf), "hd%c", i + 'a');
                bs_table[i] = bdrv_new(buf);
            }
            if (bdrv_open(bs_table[i], hd_filename[i], snapshot) < 0) {
1158
                fprintf(stderr, "qemu: could not open hard disk image '%s\n",
1159
1160
1161
                        hd_filename[i]);
                exit(1);
            }
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
            if (i == 0 && cyls != 0) 
                bdrv_set_geometry_hint(bs_table[i], cyls, heads, secs);
        }
    }

    /* we always create at least one floppy disk */
    fd_table[0] = bdrv_new("fda");
    bdrv_set_type_hint(fd_table[0], BDRV_TYPE_FLOPPY);

    for(i = 0; i < MAX_FD; i++) {
        if (fd_filename[i]) {
            if (!fd_table[i]) {
                char buf[64];
                snprintf(buf, sizeof(buf), "fd%c", i + 'a');
                fd_table[i] = bdrv_new(buf);
                bdrv_set_type_hint(fd_table[i], BDRV_TYPE_FLOPPY);
            }
            if (fd_filename[i] != '\0') {
                if (bdrv_open(fd_table[i], fd_filename[i], snapshot) < 0) {
                    fprintf(stderr, "qemu: could not open floppy disk image '%s\n",
                            fd_filename[i]);
                    exit(1);
                }
            }
1186
1187
1188
        }
    }

1189
1190
1191
1192
1193
1194
    /* init CPU state */
    env = cpu_init();
    global_env = env;
    cpu_single_env = env;

    init_ioports();
bellard's avatar
bellard committed
1195
    cpu_calibrate_ticks();
1196

1197
    /* terminal init */
1198
    if (nographic) {
1199
1200
1201
1202
1203
1204
1205
1206
        dumb_display_init(ds);
    } else {
#ifdef CONFIG_SDL
        sdl_display_init(ds);
#else
        dumb_display_init(ds);
#endif
    }
1207

bellard's avatar
bellard committed
1208
1209
1210
1211
1212
1213
#if defined(TARGET_I386)
    pc_init(ram_size, vga_ram_size, boot_device,
            ds, fd_filename, snapshot,
            kernel_filename, kernel_cmdline, initrd_filename);
#elif defined(TARGET_PPC)
    ppc_init();
1214
#endif