vl.c 146 KB
Newer Older
1
/*
bellard's avatar
bellard committed
2
 * QEMU System Emulator
3
 * 
4
 * Copyright (c) 2003-2005 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
 */
bellard's avatar
bellard committed
24 25
#include "vl.h"

26 27 28 29 30
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#include <errno.h>
bellard's avatar
bellard committed
31 32 33 34
#include <sys/time.h>

#ifndef _WIN32
#include <sys/times.h>
bellard's avatar
bellard committed
35
#include <sys/wait.h>
bellard's avatar
bellard committed
36 37 38
#include <termios.h>
#include <sys/poll.h>
#include <sys/mman.h>
bellard's avatar
bellard committed
39 40
#include <sys/ioctl.h>
#include <sys/socket.h>
bellard's avatar
bellard committed
41
#include <netinet/in.h>
bellard's avatar
bellard committed
42
#include <dirent.h>
bellard's avatar
bellard committed
43
#include <netdb.h>
bellard's avatar
bellard committed
44 45
#ifdef _BSD
#include <sys/stat.h>
46
#ifndef __APPLE__
bellard's avatar
bellard committed
47
#include <libutil.h>
48
#endif
bellard's avatar
bellard committed
49
#else
bellard's avatar
bellard committed
50
#ifndef __sun__
bellard's avatar
bellard committed
51 52
#include <linux/if.h>
#include <linux/if_tun.h>
bellard's avatar
bellard committed
53 54
#include <pty.h>
#include <malloc.h>
55
#include <linux/rtc.h>
bellard's avatar
bellard committed
56
#include <linux/ppdev.h>
bellard's avatar
bellard committed
57
#endif
bellard's avatar
bellard committed
58
#endif
bellard's avatar
bellard committed
59
#endif
bellard's avatar
bellard committed
60

bellard's avatar
bellard committed
61 62 63 64
#if defined(CONFIG_SLIRP)
#include "libslirp.h"
#endif

bellard's avatar
bellard committed
65
#ifdef _WIN32
bellard's avatar
bellard committed
66
#include <malloc.h>
bellard's avatar
bellard committed
67 68 69 70 71 72
#include <sys/timeb.h>
#include <windows.h>
#define getopt_long_only getopt_long
#define memalign(align, size) malloc(size)
#endif

bellard's avatar
bellard committed
73 74
#include "qemu_socket.h"

bellard's avatar
bellard committed
75
#ifdef CONFIG_SDL
bellard's avatar
bellard committed
76
#ifdef __APPLE__
77
#include <SDL/SDL.h>
bellard's avatar
bellard committed
78
#endif
bellard's avatar
bellard committed
79
#endif /* CONFIG_SDL */
80

81 82 83 84 85
#ifdef CONFIG_COCOA
#undef main
#define main qemu_main
#endif /* CONFIG_COCOA */

86
#include "disas.h"
bellard's avatar
bellard committed
87

88
#include "exec-all.h"
89

90
#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
bellard's avatar
bellard committed
91

92
//#define DEBUG_UNUSED_IOPORT
93
//#define DEBUG_IOPORT
94

95
#if !defined(CONFIG_SOFTMMU)
bellard's avatar
bellard committed
96
#define PHYS_RAM_MAX_SIZE (256 * 1024 * 1024)
97 98 99
#else
#define PHYS_RAM_MAX_SIZE (2047 * 1024 * 1024)
#endif
bellard's avatar
bellard committed
100

bellard's avatar
bellard committed
101 102 103
#ifdef TARGET_PPC
#define DEFAULT_RAM_SIZE 144
#else
104
#define DEFAULT_RAM_SIZE 128
bellard's avatar
bellard committed
105
#endif
106 107
/* in ms */
#define GUI_REFRESH_INTERVAL 30
108

pbrook's avatar
pbrook committed
109 110 111
/* Max number of USB devices that can be specified on the commandline.  */
#define MAX_USB_CMDLINE 8

112 113
/* XXX: use a two level table to limit memory usage */
#define MAX_IOPORTS 65536
114

bellard's avatar
bellard committed
115
const char *bios_dir = CONFIG_QEMU_SHAREDIR;
116
char phys_ram_file[1024];
117
void *ioport_opaque[MAX_IOPORTS];
bellard's avatar
bellard committed
118 119
IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
120
BlockDriverState *bs_table[MAX_DISKS], *fd_table[MAX_FD];
121
int vga_ram_size;
bellard's avatar
bellard committed
122
int bios_size;
123
static DisplayState display_state;
124
int nographic;
125
const char* keyboard_layout = NULL;
126
int64_t ticks_per_sec;
127
int boot_device = 'c';
bellard's avatar
bellard committed
128
int ram_size;
bellard's avatar
bellard committed
129
int pit_min_timer_count = 0;
130
int nb_nics;
bellard's avatar
bellard committed
131
NICInfo nd_table[MAX_NICS];
132 133
QEMUTimer *gui_timer;
int vm_running;
bellard's avatar
bellard committed
134
int rtc_utc = 1;
135
int cirrus_vga_enabled = 1;
136 137 138 139
#ifdef TARGET_SPARC
int graphic_width = 1024;
int graphic_height = 768;
#else
140 141
int graphic_width = 800;
int graphic_height = 600;
142
#endif
143
int graphic_depth = 15;
bellard's avatar
bellard committed
144
int full_screen = 0;
145
CharDriverState *serial_hds[MAX_SERIAL_PORTS];
146
CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
147 148 149
#ifdef TARGET_I386
int win2k_install_hack = 0;
#endif
bellard's avatar
bellard committed
150
int usb_enabled = 0;
bellard's avatar
bellard committed
151
static VLANState *first_vlan;
bellard's avatar
bellard committed
152
int smp_cpus = 1;
bellard's avatar
bellard committed
153
int vnc_display = -1;
bellard's avatar
bellard committed
154
#if defined(TARGET_SPARC)
155
#define MAX_CPUS 16
bellard's avatar
bellard committed
156 157
#elif defined(TARGET_I386)
#define MAX_CPUS 255
158
#else
bellard's avatar
bellard committed
159
#define MAX_CPUS 1
160
#endif
bellard's avatar
bellard committed
161
int acpi_enabled = 1;
162
int fd_bootchk = 1;
163 164

/***********************************************************/
165 166 167
/* x86 ISA bus support */

target_phys_addr_t isa_mem_base = 0;
bellard's avatar
bellard committed
168
PicState2 *isa_pic;
169

170
uint32_t default_ioport_readb(void *opaque, uint32_t address)
171 172 173 174
{
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "inb: port=0x%04x\n", address);
#endif
bellard's avatar
bellard committed
175
    return 0xff;
176 177
}

178
void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)
179 180 181 182 183 184 185
{
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "outb: port=0x%04x data=0x%02x\n", address, data);
#endif
}

/* default is to make two byte accesses */
186
uint32_t default_ioport_readw(void *opaque, uint32_t address)
187 188
{
    uint32_t data;
bellard's avatar
bellard committed
189 190 191
    data = ioport_read_table[0][address](ioport_opaque[address], address);
    address = (address + 1) & (MAX_IOPORTS - 1);
    data |= ioport_read_table[0][address](ioport_opaque[address], address) << 8;
192 193 194
    return data;
}

195
void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)
196
{
bellard's avatar
bellard committed
197 198 199
    ioport_write_table[0][address](ioport_opaque[address], address, data & 0xff);
    address = (address + 1) & (MAX_IOPORTS - 1);
    ioport_write_table[0][address](ioport_opaque[address], address, (data >> 8) & 0xff);
200 201
}

202
uint32_t default_ioport_readl(void *opaque, uint32_t address)
203
{
bellard's avatar
bellard committed
204 205 206 207
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "inl: port=0x%04x\n", address);
#endif
    return 0xffffffff;
208 209
}

210
void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)
211
{
bellard's avatar
bellard committed
212 213 214
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "outl: port=0x%04x data=0x%02x\n", address, data);
#endif
215 216
}

bellard's avatar
bellard committed
217
void init_ioports(void)
218 219 220
{
    int i;

bellard's avatar
bellard committed
221 222 223 224 225 226 227 228
    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;
    }
229 230
}

bellard's avatar
bellard committed
231
/* size is the word size in byte */
232 233
int register_ioport_read(int start, int length, int size, 
                         IOPortReadFunc *func, void *opaque)
bellard's avatar
bellard committed
234
{
bellard's avatar
bellard committed
235
    int i, bsize;
bellard's avatar
bellard committed
236

237
    if (size == 1) {
bellard's avatar
bellard committed
238
        bsize = 0;
239
    } else if (size == 2) {
bellard's avatar
bellard committed
240
        bsize = 1;
241
    } else if (size == 4) {
bellard's avatar
bellard committed
242
        bsize = 2;
243 244
    } else {
        hw_error("register_ioport_read: invalid size");
bellard's avatar
bellard committed
245
        return -1;
246 247
    }
    for(i = start; i < start + length; i += size) {
bellard's avatar
bellard committed
248
        ioport_read_table[bsize][i] = func;
249 250 251 252
        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
253 254 255
    return 0;
}

bellard's avatar
bellard committed
256
/* size is the word size in byte */
257 258
int register_ioport_write(int start, int length, int size, 
                          IOPortWriteFunc *func, void *opaque)
bellard's avatar
bellard committed
259
{
bellard's avatar
bellard committed
260
    int i, bsize;
bellard's avatar
bellard committed
261

262
    if (size == 1) {
bellard's avatar
bellard committed
263
        bsize = 0;
264
    } else if (size == 2) {
bellard's avatar
bellard committed
265
        bsize = 1;
266
    } else if (size == 4) {
bellard's avatar
bellard committed
267
        bsize = 2;
268 269
    } else {
        hw_error("register_ioport_write: invalid size");
bellard's avatar
bellard committed
270
        return -1;
271 272
    }
    for(i = start; i < start + length; i += size) {
bellard's avatar
bellard committed
273
        ioport_write_table[bsize][i] = func;
274 275 276 277
        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
278 279 280
    return 0;
}

bellard's avatar
bellard committed
281 282 283 284 285 286 287 288 289 290 291 292 293 294 295
void isa_unassign_ioport(int start, int length)
{
    int i;

    for(i = start; i < start + length; i++) {
        ioport_read_table[0][i] = default_ioport_readb;
        ioport_read_table[1][i] = default_ioport_readw;
        ioport_read_table[2][i] = default_ioport_readl;

        ioport_write_table[0][i] = default_ioport_writeb;
        ioport_write_table[1][i] = default_ioport_writew;
        ioport_write_table[2][i] = default_ioport_writel;
    }
}

bellard's avatar
bellard committed
296 297
/***********************************************************/

298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
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;
}

bellard's avatar
bellard committed
325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340
int strstart(const char *str, const char *val, const char **ptr)
{
    const char *p, *q;
    p = str;
    q = val;
    while (*q != '\0') {
        if (*p != *q)
            return 0;
        p++;
        q++;
    }
    if (ptr)
        *ptr = p;
    return 1;
}

341
void cpu_outb(CPUState *env, int addr, int val)
342
{
343 344 345 346
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "outb: %04x %02x\n", addr, val);
#endif    
347
    ioport_write_table[0][addr](ioport_opaque[addr], addr, val);
348 349 350 351
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
#endif
352 353
}

354
void cpu_outw(CPUState *env, int addr, int val)
355
{
356 357 358 359
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "outw: %04x %04x\n", addr, val);
#endif    
360
    ioport_write_table[1][addr](ioport_opaque[addr], addr, val);
361 362 363 364
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
#endif
365 366
}

367
void cpu_outl(CPUState *env, int addr, int val)
368
{
369 370 371 372
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "outl: %04x %08x\n", addr, val);
#endif
373
    ioport_write_table[2][addr](ioport_opaque[addr], addr, val);
374 375 376 377
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
#endif
378 379
}

380
int cpu_inb(CPUState *env, int addr)
381
{
382 383 384 385 386
    int val;
    val = ioport_read_table[0][addr](ioport_opaque[addr], addr);
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "inb : %04x %02x\n", addr, val);
387 388 389 390
#endif
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
391 392
#endif
    return val;
393 394
}

395
int cpu_inw(CPUState *env, int addr)
396
{
397 398 399 400 401
    int val;
    val = ioport_read_table[1][addr](ioport_opaque[addr], addr);
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "inw : %04x %04x\n", addr, val);
402 403 404 405
#endif
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
406 407
#endif
    return val;
408 409
}

410
int cpu_inl(CPUState *env, int addr)
411
{
412 413 414 415 416
    int val;
    val = ioport_read_table[2][addr](ioport_opaque[addr], addr);
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "inl : %04x %08x\n", addr, val);
417 418 419 420
#endif
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
421 422
#endif
    return val;
423 424 425 426 427 428
}

/***********************************************************/
void hw_error(const char *fmt, ...)
{
    va_list ap;
bellard's avatar
bellard committed
429
    CPUState *env;
430 431 432 433 434

    va_start(ap, fmt);
    fprintf(stderr, "qemu: hardware error: ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
bellard's avatar
bellard committed
435 436
    for(env = first_cpu; env != NULL; env = env->next_cpu) {
        fprintf(stderr, "CPU #%d:\n", env->cpu_index);
437
#ifdef TARGET_I386
bellard's avatar
bellard committed
438
        cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU);
439
#else
bellard's avatar
bellard committed
440
        cpu_dump_state(env, stderr, fprintf, 0);
441
#endif
bellard's avatar
bellard committed
442
    }
443 444 445 446
    va_end(ap);
    abort();
}

bellard's avatar
bellard committed
447 448 449 450 451 452 453
/***********************************************************/
/* keyboard/mouse */

static QEMUPutKBDEvent *qemu_put_kbd_event;
static void *qemu_put_kbd_event_opaque;
static QEMUPutMouseEvent *qemu_put_mouse_event;
static void *qemu_put_mouse_event_opaque;
454
static int qemu_put_mouse_event_absolute;
bellard's avatar
bellard committed
455 456 457 458 459 460 461

void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque)
{
    qemu_put_kbd_event_opaque = opaque;
    qemu_put_kbd_event = func;
}

462
void qemu_add_mouse_event_handler(QEMUPutMouseEvent *func, void *opaque, int absolute)
bellard's avatar
bellard committed
463 464 465
{
    qemu_put_mouse_event_opaque = opaque;
    qemu_put_mouse_event = func;
466
    qemu_put_mouse_event_absolute = absolute;
bellard's avatar
bellard committed
467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
}

void kbd_put_keycode(int keycode)
{
    if (qemu_put_kbd_event) {
        qemu_put_kbd_event(qemu_put_kbd_event_opaque, keycode);
    }
}

void kbd_mouse_event(int dx, int dy, int dz, int buttons_state)
{
    if (qemu_put_mouse_event) {
        qemu_put_mouse_event(qemu_put_mouse_event_opaque, 
                             dx, dy, dz, buttons_state);
    }
}

484 485 486 487 488
int kbd_mouse_is_absolute(void)
{
    return qemu_put_mouse_event_absolute;
}

489 490 491
/***********************************************************/
/* timers */

492 493 494
#if defined(__powerpc__)

static inline uint32_t get_tbl(void) 
495
{
496 497 498
    uint32_t tbl;
    asm volatile("mftb %0" : "=r" (tbl));
    return tbl;
499 500
}

501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522
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)
523
{
524 525 526 527 528
#ifdef _WIN32
    LARGE_INTEGER ti;
    QueryPerformanceCounter(&ti);
    return ti.QuadPart;
#else
529
    int64_t val;
bellard's avatar
bellard committed
530
    asm volatile ("rdtsc" : "=A" (val));
531
    return val;
532
#endif
533 534
}

bellard's avatar
bellard committed
535 536 537 538 539 540 541 542 543 544 545 546 547
#elif defined(__x86_64__)

int64_t cpu_get_real_ticks(void)
{
    uint32_t low,high;
    int64_t val;
    asm volatile("rdtsc" : "=a" (low), "=d" (high));
    val = high;
    val <<= 32;
    val |= low;
    return val;
}

bellard's avatar
bellard committed
548 549 550 551 552 553 554 555 556
#elif defined(__ia64)

int64_t cpu_get_real_ticks(void)
{
	int64_t val;
	asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory");
	return val;
}

bellard's avatar
bellard committed
557 558 559 560 561 562 563 564 565
#elif defined(__s390__)

int64_t cpu_get_real_ticks(void)
{
    int64_t val;
    asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc");
    return val;
}

566 567 568 569
#else
#error unsupported CPU
#endif

570
static int64_t cpu_ticks_prev;
571
static int64_t cpu_ticks_offset;
572
static int cpu_ticks_enabled;
573

574
static inline int64_t cpu_get_ticks(void)
575
{
576 577 578
    if (!cpu_ticks_enabled) {
        return cpu_ticks_offset;
    } else {
579 580 581 582 583 584 585 586 587
        int64_t ticks;
        ticks = cpu_get_real_ticks();
        if (cpu_ticks_prev > ticks) {
            /* Note: non increasing ticks may happen if the host uses
               software suspend */
            cpu_ticks_offset += cpu_ticks_prev - ticks;
        }
        cpu_ticks_prev = ticks;
        return ticks + cpu_ticks_offset;
588
    }
589 590 591 592 593
}

/* enable cpu_get_ticks() */
void cpu_enable_ticks(void)
{
594 595 596 597
    if (!cpu_ticks_enabled) {
        cpu_ticks_offset -= cpu_get_real_ticks();
        cpu_ticks_enabled = 1;
    }
598 599 600 601 602 603
}

/* disable cpu_get_ticks() : the clock is stopped. You must not call
   cpu_get_ticks() after that.  */
void cpu_disable_ticks(void)
{
604 605 606 607
    if (cpu_ticks_enabled) {
        cpu_ticks_offset = cpu_get_ticks();
        cpu_ticks_enabled = 0;
    }
608 609
}

bellard's avatar
bellard committed
610
#ifdef _WIN32
611 612 613 614 615 616 617 618 619 620 621 622 623
void cpu_calibrate_ticks(void)
{
    LARGE_INTEGER freq;
    int ret;

    ret = QueryPerformanceFrequency(&freq);
    if (ret == 0) {
        fprintf(stderr, "Could not calibrate ticks\n");
        exit(1);
    }
    ticks_per_sec = freq.QuadPart;
}

bellard's avatar
bellard committed
624
#else
625 626
static int64_t get_clock(void)
{
627 628 629 630 631
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec * 1000000LL + tv.tv_usec;
}

632 633 634 635 636
void cpu_calibrate_ticks(void)
{
    int64_t usec, ticks;

    usec = get_clock();
637
    ticks = cpu_get_real_ticks();
638 639
    usleep(50 * 1000);
    usec = get_clock() - usec;
640
    ticks = cpu_get_real_ticks() - ticks;
641 642
    ticks_per_sec = (ticks * 1000000LL + (usec >> 1)) / usec;
}
643
#endif /* !_WIN32 */
644

645
/* compute with 96 bit intermediate result: (a*b)/c */
bellard's avatar
bellard committed
646
uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668
{
    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;
}

669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688
#define QEMU_TIMER_REALTIME 0
#define QEMU_TIMER_VIRTUAL  1

struct QEMUClock {
    int type;
    /* XXX: add frequency */
};

struct QEMUTimer {
    QEMUClock *clock;
    int64_t expire_time;
    QEMUTimerCB *cb;
    void *opaque;
    struct QEMUTimer *next;
};

QEMUClock *rt_clock;
QEMUClock *vm_clock;

static QEMUTimer *active_timers[2];
bellard's avatar
bellard committed
689 690
#ifdef _WIN32
static MMRESULT timerID;
691 692
static HANDLE host_alarm = NULL;
static unsigned int period = 1;
bellard's avatar
bellard committed
693
#else
694 695
/* frequency of the times() clock tick */
static int timer_freq;
bellard's avatar
bellard committed
696
#endif
697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791

QEMUClock *qemu_new_clock(int type)
{
    QEMUClock *clock;
    clock = qemu_mallocz(sizeof(QEMUClock));
    if (!clock)
        return NULL;
    clock->type = type;
    return clock;
}

QEMUTimer *qemu_new_timer(QEMUClock *clock, QEMUTimerCB *cb, void *opaque)
{
    QEMUTimer *ts;

    ts = qemu_mallocz(sizeof(QEMUTimer));
    ts->clock = clock;
    ts->cb = cb;
    ts->opaque = opaque;
    return ts;
}

void qemu_free_timer(QEMUTimer *ts)
{
    qemu_free(ts);
}

/* stop a timer, but do not dealloc it */
void qemu_del_timer(QEMUTimer *ts)
{
    QEMUTimer **pt, *t;

    /* NOTE: this code must be signal safe because
       qemu_timer_expired() can be called from a signal. */
    pt = &active_timers[ts->clock->type];
    for(;;) {
        t = *pt;
        if (!t)
            break;
        if (t == ts) {
            *pt = t->next;
            break;
        }
        pt = &t->next;
    }
}

/* modify the current timer so that it will be fired when current_time
   >= expire_time. The corresponding callback will be called. */
void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
{
    QEMUTimer **pt, *t;

    qemu_del_timer(ts);

    /* add the timer in the sorted list */
    /* NOTE: this code must be signal safe because
       qemu_timer_expired() can be called from a signal. */
    pt = &active_timers[ts->clock->type];
    for(;;) {
        t = *pt;
        if (!t)
            break;
        if (t->expire_time > expire_time) 
            break;
        pt = &t->next;
    }
    ts->expire_time = expire_time;
    ts->next = *pt;
    *pt = ts;
}

int qemu_timer_pending(QEMUTimer *ts)
{
    QEMUTimer *t;
    for(t = active_timers[ts->clock->type]; t != NULL; t = t->next) {
        if (t == ts)
            return 1;
    }
    return 0;
}

static inline int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
{
    if (!timer_head)
        return 0;
    return (timer_head->expire_time <= current_time);
}

static void qemu_run_timers(QEMUTimer **ptimer_head, int64_t current_time)
{
    QEMUTimer *ts;
    
    for(;;) {
        ts = *ptimer_head;
792
        if (!ts || ts->expire_time > current_time)
793 794 795 796 797 798 799 800 801 802 803 804 805 806
            break;
        /* remove timer from the list before calling the callback */
        *ptimer_head = ts->next;
        ts->next = NULL;
        
        /* run the callback (the timer list can be modified) */
        ts->cb(ts->opaque);
    }
}

int64_t qemu_get_clock(QEMUClock *clock)
{
    switch(clock->type) {
    case QEMU_TIMER_REALTIME:
bellard's avatar
bellard committed
807 808 809
#ifdef _WIN32
        return GetTickCount();
#else
bellard's avatar
bellard committed
810 811 812 813 814 815 816 817 818 819 820
        {
            struct tms tp;

            /* Note that using gettimeofday() is not a good solution
               for timers because its value change when the date is
               modified. */
            if (timer_freq == 100) {
                return times(&tp) * 10;
            } else {
                return ((int64_t)times(&tp) * 1000) / timer_freq;
            }
821
        }
bellard's avatar
bellard committed
822
#endif
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874
    default:
    case QEMU_TIMER_VIRTUAL:
        return cpu_get_ticks();
    }
}

/* save a timer */
void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
{
    uint64_t expire_time;

    if (qemu_timer_pending(ts)) {
        expire_time = ts->expire_time;
    } else {
        expire_time = -1;
    }
    qemu_put_be64(f, expire_time);
}

void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
{
    uint64_t expire_time;

    expire_time = qemu_get_be64(f);
    if (expire_time != -1) {
        qemu_mod_timer(ts, expire_time);
    } else {
        qemu_del_timer(ts);
    }
}

static void timer_save(QEMUFile *f, void *opaque)
{
    if (cpu_ticks_enabled) {
        hw_error("cannot save state if virtual timers are running");
    }
    qemu_put_be64s(f, &cpu_ticks_offset);
    qemu_put_be64s(f, &ticks_per_sec);
}

static int timer_load(QEMUFile *f, void *opaque, int version_id)
{
    if (version_id != 1)
        return -EINVAL;
    if (cpu_ticks_enabled) {
        return -EINVAL;
    }
    qemu_get_be64s(f, &cpu_ticks_offset);
    qemu_get_be64s(f, &ticks_per_sec);
    return 0;
}

bellard's avatar
bellard committed
875 876 877 878
#ifdef _WIN32
void CALLBACK host_alarm_handler(UINT uTimerID, UINT uMsg, 
                                 DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
#else
879
static void host_alarm_handler(int host_signum)
bellard's avatar
bellard committed
880
#endif
881
{
882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910
#if 0
#define DISP_FREQ 1000
    {
        static int64_t delta_min = INT64_MAX;
        static int64_t delta_max, delta_cum, last_clock, delta, ti;
        static int count;
        ti = qemu_get_clock(vm_clock);
        if (last_clock != 0) {
            delta = ti - last_clock;
            if (delta < delta_min)
                delta_min = delta;
            if (delta > delta_max)
                delta_max = delta;
            delta_cum += delta;
            if (++count == DISP_FREQ) {
                printf("timer: min=%lld us max=%lld us avg=%lld us avg_freq=%0.3f Hz\n",
                       muldiv64(delta_min, 1000000, ticks_per_sec),
                       muldiv64(delta_max, 1000000, ticks_per_sec),
                       muldiv64(delta_cum, 1000000 / DISP_FREQ, ticks_per_sec),
                       (double)ticks_per_sec / ((double)delta_cum / DISP_FREQ));
                count = 0;
                delta_min = INT64_MAX;
                delta_max = 0;
                delta_cum = 0;
            }
        }
        last_clock = ti;
    }
#endif
911 912 913 914
    if (qemu_timer_expired(active_timers[QEMU_TIMER_VIRTUAL],
                           qemu_get_clock(vm_clock)) ||
        qemu_timer_expired(active_timers[QEMU_TIMER_REALTIME],
                           qemu_get_clock(rt_clock))) {
915 916 917
#ifdef _WIN32
        SetEvent(host_alarm);
#endif
bellard's avatar
bellard committed
918 919 920 921
        CPUState *env = cpu_single_env;
        if (env) {
            /* stop the currently executing cpu because a timer occured */
            cpu_interrupt(env, CPU_INTERRUPT_EXIT);
922
#ifdef USE_KQEMU
bellard's avatar
bellard committed
923 924 925
            if (env->kqemu_enabled) {
                kqemu_cpu_interrupt(env);
            }
926
#endif
bellard's avatar
bellard committed
927
        }
928 929 930
    }
}

931 932
#ifndef _WIN32

bellard's avatar
BSD fix  
bellard committed
933 934
#if defined(__linux__)

935 936 937
#define RTC_FREQ 1024

static int rtc_fd;
bellard's avatar
BSD fix  
bellard committed
938

939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958
static int start_rtc_timer(void)
{
    rtc_fd = open("/dev/rtc", O_RDONLY);
    if (rtc_fd < 0)
        return -1;
    if (ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) {
        fprintf(stderr, "Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal\n"
                "error, but for better emulation accuracy either use a 2.6 host Linux kernel or\n"
                "type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.\n");
        goto fail;
    }
    if (ioctl(rtc_fd, RTC_PIE_ON, 0) < 0) {
    fail:
        close(rtc_fd);
        return -1;
    }
    pit_min_timer_count = PIT_FREQ / RTC_FREQ;
    return 0;
}

bellard's avatar
BSD fix  
bellard committed
959 960 961 962 963 964 965 966 967 968
#else

static int start_rtc_timer(void)
{
    return -1;
}

#endif /* !defined(__linux__) */

#endif /* !defined(_WIN32) */
969

970 971 972 973 974
static void init_timers(void)
{
    rt_clock = qemu_new_clock(QEMU_TIMER_REALTIME);
    vm_clock = qemu_new_clock(QEMU_TIMER_VIRTUAL);

bellard's avatar
bellard committed
975 976 977
#ifdef _WIN32
    {
        int count=0;
978 979 980 981 982 983 984
        TIMECAPS tc;

        ZeroMemory(&tc, sizeof(TIMECAPS));
        timeGetDevCaps(&tc, sizeof(TIMECAPS));
        if (period < tc.wPeriodMin)
            period = tc.wPeriodMin;
        timeBeginPeriod(period);
985
        timerID = timeSetEvent(1,     // interval (ms)
986
                               period,     // resolution
bellard's avatar
bellard committed
987 988 989
                               host_alarm_handler, // function
                               (DWORD)&count,  // user parameter
                               TIME_PERIODIC | TIME_CALLBACK_FUNCTION);
bellard's avatar
bellard committed
990 991 992 993
 	if( !timerID ) {
            perror("failed timer alarm");
            exit(1);
 	}
994 995 996 997 998 999
        host_alarm = CreateEvent(NULL, FALSE, FALSE, NULL);
        if (!host_alarm) {
            perror("failed CreateEvent");
            exit(1);
        }
        ResetEvent(host_alarm);
bellard's avatar
bellard committed
1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011
    }
    pit_min_timer_count = ((uint64_t)10000 * PIT_FREQ) / 1000000;
#else
    {
        struct sigaction act;
        struct itimerval itv;
        
        /* get times() syscall frequency */
        timer_freq = sysconf(_SC_CLK_TCK);
        
        /* timer signal */
        sigfillset(&act.sa_mask);
1012
       act.sa_flags = 0;
1013
#if defined (TARGET_I386) && defined(USE_CODE_COPY)
bellard's avatar
bellard committed
1014 1015 1016 1017
        act.sa_flags |= SA_ONSTACK;
#endif
        act.sa_handler = host_alarm_handler;
        sigaction(SIGALRM, &act, NULL);
1018

bellard's avatar
bellard committed
1019
        itv.it_interval.tv_sec = 0;
bellard's avatar
bellard committed
1020
        itv.it_interval.tv_usec = 999; /* for i386 kernel 2.6 to get 1 ms */
bellard's avatar
bellard committed
1021 1022 1023 1024 1025 1026
        itv.it_value.tv_sec = 0;
        itv.it_value.tv_usec = 10 * 1000;
        setitimer(ITIMER_REAL, &itv, NULL);
        /* we probe the tick duration of the kernel to inform the user if
           the emulated kernel requested a too high timer frequency */
        getitimer(ITIMER_REAL, &itv);
1027

1028
#if defined(__linux__)
1029 1030 1031 1032 1033
        /* XXX: force /dev/rtc usage because even 2.6 kernels may not
           have timers with 1 ms resolution. The correct solution will
           be to use the POSIX real time timers available in recent
           2.6 kernels */
        if (itv.it_interval.tv_usec > 1000 || 1) {
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
            /* try to use /dev/rtc to have a faster timer */
            if (start_rtc_timer() < 0)
                goto use_itimer;
            /* disable itimer */
            itv.it_interval.tv_sec = 0;
            itv.it_interval.tv_usec = 0;
            itv.it_value.tv_sec = 0;
            itv.it_value.tv_usec = 0;
            setitimer(ITIMER_REAL, &itv, NULL);

            /* use the RTC */
bellard's avatar
bellard committed
1045
            sigaction(SIGIO, &act, NULL);
1046 1047
            fcntl(rtc_fd, F_SETFL, O_ASYNC);
            fcntl(rtc_fd, F_SETOWN, getpid());
1048 1049 1050
        } else 
#endif /* defined(__linux__) */
        {
1051 1052 1053 1054
        use_itimer:
            pit_min_timer_count = ((uint64_t)itv.it_interval.tv_usec * 
                                   PIT_FREQ) / 1000000;
        }
bellard's avatar
bellard committed
1055
    }
1056 1057 1058
#endif
}

bellard's avatar
bellard committed
1059 1060 1061 1062
void quit_timers(void)
{
#ifdef _WIN32
    timeKillEvent(timerID);
1063 1064 1065 1066 1067
    timeEndPeriod(period);
    if (host_alarm) {
        CloseHandle(host_alarm);
        host_alarm = NULL;
    }
bellard's avatar
bellard committed
1068 1069 1070
#endif
}

1071
/***********************************************************/
bellard's avatar
bellard committed
1072
/* character device */
1073

bellard's avatar
bellard committed
1074 1075 1076 1077
int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
{
    return s->chr_write(s, buf, len);
}
bellard's avatar
bellard committed
1078

bellard's avatar
bellard committed
1079
int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
bellard's avatar
bellard committed
1080
{
bellard's avatar
bellard committed
1081 1082 1083
    if (!s->chr_ioctl)
        return -ENOTSUP;
    return s->chr_ioctl(s, cmd, arg);
bellard's avatar
bellard committed
1084 1085
}

bellard's avatar
bellard committed
1086
void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
bellard's avatar
bellard committed
1087
{
bellard's avatar
bellard committed
1088 1089 1090 1091 1092 1093
    char buf[4096];
    va_list ap;
    va_start(ap, fmt);
    vsnprintf(buf, sizeof(buf), fmt, ap);
    qemu_chr_write(s, buf, strlen(buf));
    va_end(ap);
bellard's avatar
bellard committed
1094 1095
}

bellard's avatar
bellard committed
1096 1097 1098 1099 1100 1101
void qemu_chr_send_event(CharDriverState *s, int event)
{
    if (s->chr_send_event)
        s->chr_send_event(s, event);
}

bellard's avatar
bellard committed
1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112
void qemu_chr_add_read_handler(CharDriverState *s, 
                               IOCanRWHandler *fd_can_read, 
                               IOReadHandler *fd_read, void *opaque)
{
    s->chr_add_read_handler(s, fd_can_read, fd_read, opaque);
}
             
void qemu_chr_add_event_handler(CharDriverState *s, IOEventHandler *chr_event)
{
    s->chr_event = chr_event;
}
bellard's avatar
bellard committed
1113

bellard's avatar
bellard committed
1114
static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1115
{
bellard's avatar
bellard committed
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133