vl.c 179 KB
Newer Older
1
/*
bellard's avatar
bellard committed
2
 * QEMU System Emulator
3
 * 
bellard's avatar
bellard committed
4
 * Copyright (c) 2003-2006 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
#include <sys/time.h>
32
#include <zlib.h>
bellard's avatar
bellard committed
33 34 35

#ifndef _WIN32
#include <sys/times.h>
bellard's avatar
bellard committed
36
#include <sys/wait.h>
bellard's avatar
bellard committed
37 38 39
#include <termios.h>
#include <sys/poll.h>
#include <sys/mman.h>
bellard's avatar
bellard committed
40 41
#include <sys/ioctl.h>
#include <sys/socket.h>
bellard's avatar
bellard committed
42
#include <netinet/in.h>
bellard's avatar
bellard committed
43
#include <dirent.h>
bellard's avatar
bellard committed
44
#include <netdb.h>
bellard's avatar
bellard committed
45 46
#ifdef _BSD
#include <sys/stat.h>
47
#ifndef __APPLE__
bellard's avatar
bellard committed
48
#include <libutil.h>
49
#endif
bellard's avatar
bellard committed
50
#else
bellard's avatar
bellard committed
51
#ifndef __sun__
bellard's avatar
bellard committed
52 53
#include <linux/if.h>
#include <linux/if_tun.h>
bellard's avatar
bellard committed
54 55
#include <pty.h>
#include <malloc.h>
56
#include <linux/rtc.h>
bellard's avatar
bellard committed
57
#include <linux/ppdev.h>
bellard's avatar
bellard committed
58
#endif
bellard's avatar
bellard committed
59
#endif
bellard's avatar
bellard committed
60
#endif
bellard's avatar
bellard committed
61

bellard's avatar
bellard committed
62 63 64 65
#if defined(CONFIG_SLIRP)
#include "libslirp.h"
#endif

bellard's avatar
bellard committed
66
#ifdef _WIN32
bellard's avatar
bellard committed
67
#include <malloc.h>
bellard's avatar
bellard committed
68 69 70 71 72 73
#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
74 75
#include "qemu_socket.h"

bellard's avatar
bellard committed
76
#ifdef CONFIG_SDL
bellard's avatar
bellard committed
77
#ifdef __APPLE__
78
#include <SDL/SDL.h>
bellard's avatar
bellard committed
79
#endif
bellard's avatar
bellard committed
80
#endif /* CONFIG_SDL */
81

82 83 84 85 86
#ifdef CONFIG_COCOA
#undef main
#define main qemu_main
#endif /* CONFIG_COCOA */

87
#include "disas.h"
bellard's avatar
bellard committed
88

89
#include "exec-all.h"
90

91
#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
bellard's avatar
bellard committed
92

93
//#define DEBUG_UNUSED_IOPORT
94
//#define DEBUG_IOPORT
95

96
#define PHYS_RAM_MAX_SIZE (2047 * 1024 * 1024)
bellard's avatar
bellard committed
97

bellard's avatar
bellard committed
98 99 100
#ifdef TARGET_PPC
#define DEFAULT_RAM_SIZE 144
#else
101
#define DEFAULT_RAM_SIZE 128
bellard's avatar
bellard committed
102
#endif
103 104
/* in ms */
#define GUI_REFRESH_INTERVAL 30
105

pbrook's avatar
pbrook committed
106 107 108
/* Max number of USB devices that can be specified on the commandline.  */
#define MAX_USB_CMDLINE 8

109 110
/* XXX: use a two level table to limit memory usage */
#define MAX_IOPORTS 65536
111

bellard's avatar
bellard committed
112
const char *bios_dir = CONFIG_QEMU_SHAREDIR;
113
char phys_ram_file[1024];
114
void *ioport_opaque[MAX_IOPORTS];
bellard's avatar
bellard committed
115 116
IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
bellard's avatar
bellard committed
117 118 119 120 121
/* Note: bs_table[MAX_DISKS] is a dummy block driver if none available
   to store the VM snapshots */
BlockDriverState *bs_table[MAX_DISKS + 1], *fd_table[MAX_FD];
/* point to the block driver where the snapshots are managed */
BlockDriverState *bs_snapshots;
122
int vga_ram_size;
bellard's avatar
bellard committed
123
int bios_size;
124
static DisplayState display_state;
125
int nographic;
126
const char* keyboard_layout = NULL;
127
int64_t ticks_per_sec;
128
int boot_device = 'c';
bellard's avatar
bellard committed
129
int ram_size;
bellard's avatar
bellard committed
130
int pit_min_timer_count = 0;
131
int nb_nics;
bellard's avatar
bellard committed
132
NICInfo nd_table[MAX_NICS];
133 134
QEMUTimer *gui_timer;
int vm_running;
bellard's avatar
bellard committed
135
int rtc_utc = 1;
136
int cirrus_vga_enabled = 1;
137 138 139 140
#ifdef TARGET_SPARC
int graphic_width = 1024;
int graphic_height = 768;
#else
141 142
int graphic_width = 800;
int graphic_height = 600;
143
#endif
144
int graphic_depth = 15;
bellard's avatar
bellard committed
145
int full_screen = 0;
146
int no_quit = 0;
147
CharDriverState *serial_hds[MAX_SERIAL_PORTS];
148
CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
149 150 151
#ifdef TARGET_I386
int win2k_install_hack = 0;
#endif
bellard's avatar
bellard committed
152
int usb_enabled = 0;
bellard's avatar
bellard committed
153
static VLANState *first_vlan;
bellard's avatar
bellard committed
154
int smp_cpus = 1;
155
const char *vnc_display;
bellard's avatar
bellard committed
156
#if defined(TARGET_SPARC)
157
#define MAX_CPUS 16
bellard's avatar
bellard committed
158 159
#elif defined(TARGET_I386)
#define MAX_CPUS 255
160
#else
bellard's avatar
bellard committed
161
#define MAX_CPUS 1
162
#endif
bellard's avatar
bellard committed
163
int acpi_enabled = 1;
164
int fd_bootchk = 1;
bellard's avatar
bellard committed
165
int no_reboot = 0;
166 167

/***********************************************************/
168 169 170
/* x86 ISA bus support */

target_phys_addr_t isa_mem_base = 0;
bellard's avatar
bellard committed
171
PicState2 *isa_pic;
172

173
uint32_t default_ioport_readb(void *opaque, uint32_t address)
174 175 176 177
{
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "inb: port=0x%04x\n", address);
#endif
bellard's avatar
bellard committed
178
    return 0xff;
179 180
}

181
void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)
182 183 184 185 186 187 188
{
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "outb: port=0x%04x data=0x%02x\n", address, data);
#endif
}

/* default is to make two byte accesses */
189
uint32_t default_ioport_readw(void *opaque, uint32_t address)
190 191
{
    uint32_t data;
bellard's avatar
bellard committed
192 193 194
    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;
195 196 197
    return data;
}

198
void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)
199
{
bellard's avatar
bellard committed
200 201 202
    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);
203 204
}

205
uint32_t default_ioport_readl(void *opaque, uint32_t address)
206
{
bellard's avatar
bellard committed
207 208 209 210
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "inl: port=0x%04x\n", address);
#endif
    return 0xffffffff;
211 212
}

213
void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)
214
{
bellard's avatar
bellard committed
215 216 217
#ifdef DEBUG_UNUSED_IOPORT
    fprintf(stderr, "outl: port=0x%04x data=0x%02x\n", address, data);
#endif
218 219
}

bellard's avatar
bellard committed
220
void init_ioports(void)
221 222 223
{
    int i;

bellard's avatar
bellard committed
224 225 226 227 228 229 230 231
    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;
    }
232 233
}

bellard's avatar
bellard committed
234
/* size is the word size in byte */
235 236
int register_ioport_read(int start, int length, int size, 
                         IOPortReadFunc *func, void *opaque)
bellard's avatar
bellard committed
237
{
bellard's avatar
bellard committed
238
    int i, bsize;
bellard's avatar
bellard committed
239

240
    if (size == 1) {
bellard's avatar
bellard committed
241
        bsize = 0;
242
    } else if (size == 2) {
bellard's avatar
bellard committed
243
        bsize = 1;
244
    } else if (size == 4) {
bellard's avatar
bellard committed
245
        bsize = 2;
246 247
    } else {
        hw_error("register_ioport_read: invalid size");
bellard's avatar
bellard committed
248
        return -1;
249 250
    }
    for(i = start; i < start + length; i += size) {
bellard's avatar
bellard committed
251
        ioport_read_table[bsize][i] = func;
252 253 254 255
        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
256 257 258
    return 0;
}

bellard's avatar
bellard committed
259
/* size is the word size in byte */
260 261
int register_ioport_write(int start, int length, int size, 
                          IOPortWriteFunc *func, void *opaque)
bellard's avatar
bellard committed
262
{
bellard's avatar
bellard committed
263
    int i, bsize;
bellard's avatar
bellard committed
264

265
    if (size == 1) {
bellard's avatar
bellard committed
266
        bsize = 0;
267
    } else if (size == 2) {
bellard's avatar
bellard committed
268
        bsize = 1;
269
    } else if (size == 4) {
bellard's avatar
bellard committed
270
        bsize = 2;
271 272
    } else {
        hw_error("register_ioport_write: invalid size");
bellard's avatar
bellard committed
273
        return -1;
274 275
    }
    for(i = start; i < start + length; i += size) {
bellard's avatar
bellard committed
276
        ioport_write_table[bsize][i] = func;
277 278 279 280
        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
281 282 283
    return 0;
}

bellard's avatar
bellard committed
284 285 286 287 288 289 290 291 292 293 294 295 296 297 298
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
299 300
/***********************************************************/

301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
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
328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343
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;
}

344
void cpu_outb(CPUState *env, int addr, int val)
345
{
346 347 348 349
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "outb: %04x %02x\n", addr, val);
#endif    
350
    ioport_write_table[0][addr](ioport_opaque[addr], addr, val);
351 352 353 354
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
#endif
355 356
}

357
void cpu_outw(CPUState *env, int addr, int val)
358
{
359 360 361 362
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "outw: %04x %04x\n", addr, val);
#endif    
363
    ioport_write_table[1][addr](ioport_opaque[addr], addr, val);
364 365 366 367
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
#endif
368 369
}

370
void cpu_outl(CPUState *env, int addr, int val)
371
{
372 373 374 375
#ifdef DEBUG_IOPORT
    if (loglevel & CPU_LOG_IOPORT)
        fprintf(logfile, "outl: %04x %08x\n", addr, val);
#endif
376
    ioport_write_table[2][addr](ioport_opaque[addr], addr, val);
377 378 379 380
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
#endif
381 382
}

383
int cpu_inb(CPUState *env, int addr)
384
{
385 386 387 388 389
    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);
390 391 392 393
#endif
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
394 395
#endif
    return val;
396 397
}

398
int cpu_inw(CPUState *env, int addr)
399
{
400 401 402 403 404
    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);
405 406 407 408
#endif
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
409 410
#endif
    return val;
411 412
}

413
int cpu_inl(CPUState *env, int addr)
414
{
415 416 417 418 419
    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);
420 421 422 423
#endif
#ifdef USE_KQEMU
    if (env)
        env->last_io_time = cpu_get_time_fast();
424 425
#endif
    return val;
426 427 428 429 430 431
}

/***********************************************************/
void hw_error(const char *fmt, ...)
{
    va_list ap;
bellard's avatar
bellard committed
432
    CPUState *env;
433 434 435 436 437

    va_start(ap, fmt);
    fprintf(stderr, "qemu: hardware error: ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
bellard's avatar
bellard committed
438 439
    for(env = first_cpu; env != NULL; env = env->next_cpu) {
        fprintf(stderr, "CPU #%d:\n", env->cpu_index);
440
#ifdef TARGET_I386
bellard's avatar
bellard committed
441
        cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU);
442
#else
bellard's avatar
bellard committed
443
        cpu_dump_state(env, stderr, fprintf, 0);
444
#endif
bellard's avatar
bellard committed
445
    }
446 447 448 449
    va_end(ap);
    abort();
}

bellard's avatar
bellard committed
450 451 452 453 454 455 456
/***********************************************************/
/* 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;
457
static int qemu_put_mouse_event_absolute;
bellard's avatar
bellard committed
458 459 460 461 462 463 464

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

465
void qemu_add_mouse_event_handler(QEMUPutMouseEvent *func, void *opaque, int absolute)
bellard's avatar
bellard committed
466 467 468
{
    qemu_put_mouse_event_opaque = opaque;
    qemu_put_mouse_event = func;
469
    qemu_put_mouse_event_absolute = absolute;
bellard's avatar
bellard committed
470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486
}

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);
    }
}

487 488 489 490 491
int kbd_mouse_is_absolute(void)
{
    return qemu_put_mouse_event_absolute;
}

492 493
/* compute with 96 bit intermediate result: (a*b)/c */
uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
494
{
495 496 497 498 499 500 501 502 503 504 505
    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;
506

507 508 509 510 511 512 513
    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;
514 515
}

516 517
/***********************************************************/
/* real time host monotonic timer */
518

519
#define QEMU_TIMER_BASE 1000000000LL
520

521
#ifdef WIN32
522

523
static int64_t clock_freq;
bellard's avatar
bellard committed
524

525
static void init_get_clock(void)
bellard's avatar
bellard committed
526
{
527 528
    LARGE_INTEGER freq;
    int ret;
529 530 531 532 533 534
    ret = QueryPerformanceFrequency(&freq);
    if (ret == 0) {
        fprintf(stderr, "Could not calibrate ticks\n");
        exit(1);
    }
    clock_freq = freq.QuadPart;
bellard's avatar
bellard committed
535 536
}

537
static int64_t get_clock(void)
bellard's avatar
bellard committed
538
{
539 540 541
    LARGE_INTEGER ti;
    QueryPerformanceCounter(&ti);
    return muldiv64(ti.QuadPart, QEMU_TIMER_BASE, clock_freq);
bellard's avatar
bellard committed
542 543
}

544
#else
bellard's avatar
bellard committed
545

546 547 548
static int use_rt_clock;

static void init_get_clock(void)
bellard's avatar
bellard committed
549
{
550 551 552 553 554 555 556 557 558
    use_rt_clock = 0;
#if defined(__linux__)
    {
        struct timespec ts;
        if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
            use_rt_clock = 1;
        }
    }
#endif
bellard's avatar
bellard committed
559 560
}

561
static int64_t get_clock(void)
bellard's avatar
bellard committed
562
{
563 564 565 566 567 568
#if defined(__linux__)
    if (use_rt_clock) {
        struct timespec ts;
        clock_gettime(CLOCK_MONOTONIC, &ts);
        return ts.tv_sec * 1000000000LL + ts.tv_nsec;
    } else 
bellard's avatar
bellard committed
569
#endif
570 571 572 573 574 575 576
    {
        /* XXX: using gettimeofday leads to problems if the date
           changes, so it should be avoided. */
        struct timeval tv;
        gettimeofday(&tv, NULL);
        return tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000);
    }
bellard's avatar
bellard committed
577 578
}

579 580
#endif

581 582 583
/***********************************************************/
/* guest cycle counter */

584
static int64_t cpu_ticks_prev;
585
static int64_t cpu_ticks_offset;
586
static int64_t cpu_clock_offset;
587
static int cpu_ticks_enabled;
588

589 590
/* return the host CPU cycle counter and handle stop/restart */
int64_t cpu_get_ticks(void)
591
{
592 593 594
    if (!cpu_ticks_enabled) {
        return cpu_ticks_offset;
    } else {
595 596 597 598 599 600 601 602 603
        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;
604
    }
605 606
}

607 608 609 610 611 612 613 614 615 616 617 618
/* return the host CPU monotonic timer and handle stop/restart */
static int64_t cpu_get_clock(void)
{
    int64_t ti;
    if (!cpu_ticks_enabled) {
        return cpu_clock_offset;
    } else {
        ti = get_clock();
        return ti + cpu_clock_offset;
    }
}

619 620 621
/* enable cpu_get_ticks() */
void cpu_enable_ticks(void)
{
622 623
    if (!cpu_ticks_enabled) {
        cpu_ticks_offset -= cpu_get_real_ticks();
624
        cpu_clock_offset -= get_clock();
625 626
        cpu_ticks_enabled = 1;
    }
627 628 629 630 631 632
}

/* disable cpu_get_ticks() : the clock is stopped. You must not call
   cpu_get_ticks() after that.  */
void cpu_disable_ticks(void)
{
633 634
    if (cpu_ticks_enabled) {
        cpu_ticks_offset = cpu_get_ticks();
635
        cpu_clock_offset = cpu_get_clock();
636 637
        cpu_ticks_enabled = 0;
    }
638 639
}

640 641 642
/***********************************************************/
/* timers */
 
643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662
#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
663 664
#ifdef _WIN32
static MMRESULT timerID;
665 666
static HANDLE host_alarm = NULL;
static unsigned int period = 1;
bellard's avatar
bellard committed
667
#else
668 669
/* frequency of the times() clock tick */
static int timer_freq;
bellard's avatar
bellard committed
670
#endif
671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765

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;
766
        if (!ts || ts->expire_time > current_time)
767 768 769 770 771 772 773 774 775 776 777 778 779 780
            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:
781
        return get_clock() / 1000000;
782 783
    default:
    case QEMU_TIMER_VIRTUAL:
784
        return cpu_get_clock();
785 786 787
    }
}

788 789 790 791 792 793 794 795
static void init_timers(void)
{
    init_get_clock();
    ticks_per_sec = QEMU_TIMER_BASE;
    rt_clock = qemu_new_clock(QEMU_TIMER_REALTIME);
    vm_clock = qemu_new_clock(QEMU_TIMER_VIRTUAL);
}

796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
/* 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);
828
    qemu_put_be64s(f, &cpu_clock_offset);
829 830 831 832
}

static int timer_load(QEMUFile *f, void *opaque, int version_id)
{
833
    if (version_id != 1 && version_id != 2)
834 835 836 837 838 839
        return -EINVAL;
    if (cpu_ticks_enabled) {
        return -EINVAL;
    }
    qemu_get_be64s(f, &cpu_ticks_offset);
    qemu_get_be64s(f, &ticks_per_sec);
840 841 842
    if (version_id == 2) {
        qemu_get_be64s(f, &cpu_clock_offset);
    }
843 844 845
    return 0;
}

bellard's avatar
bellard committed
846 847 848 849
#ifdef _WIN32
void CALLBACK host_alarm_handler(UINT uTimerID, UINT uMsg, 
                                 DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
#else
850
static void host_alarm_handler(int host_signum)
bellard's avatar
bellard committed
851
#endif
852
{
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867
#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) {
bellard's avatar
bellard committed
868
                printf("timer: min=%" PRId64 " us max=%" PRId64 " us avg=%" PRId64 " us avg_freq=%0.3f Hz\n",
869 870 871 872 873 874 875 876 877 878 879 880 881
                       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
882 883 884 885
    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))) {
886 887 888
#ifdef _WIN32
        SetEvent(host_alarm);
#endif
bellard's avatar
bellard committed
889 890 891 892
        CPUState *env = cpu_single_env;
        if (env) {
            /* stop the currently executing cpu because a timer occured */
            cpu_interrupt(env, CPU_INTERRUPT_EXIT);
893
#ifdef USE_KQEMU
bellard's avatar
bellard committed
894 895 896
            if (env->kqemu_enabled) {
                kqemu_cpu_interrupt(env);
            }
897
#endif
bellard's avatar
bellard committed
898
        }
899 900 901
    }
}

902 903
#ifndef _WIN32

bellard's avatar
BSD fix  
bellard committed
904 905
#if defined(__linux__)

906 907 908
#define RTC_FREQ 1024

static int rtc_fd;
bellard's avatar
BSD fix  
bellard committed
909

910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
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
930 931 932 933 934 935 936 937 938 939
#else

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

#endif /* !defined(__linux__) */

#endif /* !defined(_WIN32) */
940

941
static void init_timer_alarm(void)
942
{
bellard's avatar
bellard committed
943 944 945
#ifdef _WIN32
    {
        int count=0;
946 947 948 949 950 951 952
        TIMECAPS tc;

        ZeroMemory(&tc, sizeof(TIMECAPS));
        timeGetDevCaps(&tc, sizeof(TIMECAPS));
        if (period < tc.wPeriodMin)
            period = tc.wPeriodMin;
        timeBeginPeriod(period);
953
        timerID = timeSetEvent(1,     // interval (ms)
954
                               period,     // resolution
bellard's avatar
bellard committed
955 956 957
                               host_alarm_handler, // function
                               (DWORD)&count,  // user parameter
                               TIME_PERIODIC | TIME_CALLBACK_FUNCTION);
bellard's avatar
bellard committed
958 959 960 961
 	if( !timerID ) {
            perror("failed timer alarm");
            exit(1);
 	}
962 963 964 965 966
        host_alarm = CreateEvent(NULL, FALSE, FALSE, NULL);
        if (!host_alarm) {
            perror("failed CreateEvent");
            exit(1);
        }
967
        qemu_add_wait_object(host_alarm, NULL, NULL);
bellard's avatar
bellard committed
968 969 970 971 972 973 974 975 976 977 978 979
    }
    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);
980
       act.sa_flags = 0;
981
#if defined (TARGET_I386) && defined(USE_CODE_COPY)
bellard's avatar
bellard committed
982 983 984 985
        act.sa_flags |= SA_ONSTACK;
#endif
        act.sa_handler = host_alarm_handler;
        sigaction(SIGALRM, &act, NULL);
986

bellard's avatar
bellard committed
987
        itv.it_interval.tv_sec = 0;
bellard's avatar
bellard committed
988
        itv.it_interval.tv_usec = 999; /* for i386 kernel 2.6 to get 1 ms */
bellard's avatar
bellard committed
989 990 991 992 993 994
        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);
995

996
#if defined(__linux__)
997 998 999 1000 1001
        /* 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) {
1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
            /* 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
1013
            sigaction(SIGIO, &act, NULL);
1014 1015
            fcntl(rtc_fd, F_SETFL, O_ASYNC);
            fcntl(rtc_fd, F_SETOWN, getpid());
1016 1017 1018
        } else 
#endif /* defined(__linux__) */
        {
1019 1020 1021 1022
        use_itimer:
            pit_min_timer_count = ((uint64_t)itv.it_interval.tv_usec * 
                                   PIT_FREQ) / 1000000;
        }
bellard's avatar
bellard committed
1023
    }
1024 1025 1026
#endif
}

bellard's avatar
bellard committed
1027 1028 1029 1030
void quit_timers(void)
{
#ifdef _WIN32
    timeKillEvent(timerID);
1031 1032 1033 1034 1035
    timeEndPeriod(period);
    if (host_alarm) {
        CloseHandle(host_alarm);
        host_alarm = NULL;
    }
bellard's avatar
bellard committed
1036 1037 1038
#endif
}

1039
/***********************************************************/
bellard's avatar
bellard committed
1040
/* character device */
1041

bellard's avatar
bellard committed
1042 1043 1044 1045
int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
{
    return s->chr_write(s, buf, len);
}
bellard's avatar
bellard committed
1046

bellard's avatar
bellard committed
1047
int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
bellard's avatar
bellard committed
1048
{
bellard's avatar
bellard committed
1049 1050 1051
    if (!s->chr_ioctl)
        return -ENOTSUP;
    return s->chr_ioctl(s, cmd, arg);
bellard's avatar
bellard committed
1052 1053
}

bellard's avatar
bellard committed
1054
void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
bellard's avatar
bellard committed
1055
{
bellard's avatar