m48t59.c 16.5 KB
Newer Older
1
/*
2
 * QEMU M48T59 and M48T08 NVRAM emulation for PPC PREP and Sparc platforms
3
 * 
4
 * Copyright (c) 2003-2005, 2007 Jocelyn Mayer
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 * 
 * 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.
 */
#include "vl.h"
25
#include "m48t59.h"
26

bellard's avatar
bellard committed
27
//#define DEBUG_NVRAM
28

bellard's avatar
bellard committed
29
#if defined(DEBUG_NVRAM)
30
31
32
33
34
#define NVRAM_PRINTF(fmt, args...) do { printf(fmt , ##args); } while (0)
#else
#define NVRAM_PRINTF(fmt, args...) do { } while (0)
#endif

35
36
37
38
39
/*
 * The M48T08 and M48T59 chips are very similar. The newer '59 has
 * alarm and a watchdog timer and related control registers. In the
 * PPC platform there is also a nvram lock function.
 */
40
struct m48t59_t {
41
42
    /* Model parameters */
    int type; // 8 = m48t08, 59 = m48t59
43
    /* Hardware parameters */
pbrook's avatar
pbrook committed
44
    qemu_irq IRQ;
bellard's avatar
bellard committed
45
    int mem_index;
46
    target_phys_addr_t mem_base;
47
48
49
50
51
52
53
54
55
56
    uint32_t io_base;
    uint16_t size;
    /* RTC management */
    time_t   time_offset;
    time_t   stop_time;
    /* Alarm & watchdog */
    time_t   alarm;
    struct QEMUTimer *alrm_timer;
    struct QEMUTimer *wd_timer;
    /* NVRAM storage */
bellard's avatar
bellard committed
57
    uint8_t  lock;
58
59
    uint16_t addr;
    uint8_t *buffer;
60
};
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79

/* Fake timer functions */
/* Generic helpers for BCD */
static inline uint8_t toBCD (uint8_t value)
{
    return (((value / 10) % 10) << 4) | (value % 10);
}

static inline uint8_t fromBCD (uint8_t BCD)
{
    return ((BCD >> 4) * 10) + (BCD & 0x0F);
}

/* RTC management helpers */
static void get_time (m48t59_t *NVRAM, struct tm *tm)
{
    time_t t;

    t = time(NULL) + NVRAM->time_offset;
bellard's avatar
bellard committed
80
81
82
#ifdef _WIN32
    memcpy(tm,localtime(&t),sizeof(*tm));
#else
83
84
85
86
    if (rtc_utc)
        gmtime_r (&t, tm);
    else
        localtime_r (&t, tm) ;
bellard's avatar
bellard committed
87
#endif
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
}

static void set_time (m48t59_t *NVRAM, struct tm *tm)
{
    time_t now, new_time;
    
    new_time = mktime(tm);
    now = time(NULL);
    NVRAM->time_offset = new_time - now;
}

/* Alarm management */
static void alarm_cb (void *opaque)
{
    struct tm tm, tm_now;
    uint64_t next_time;
    m48t59_t *NVRAM = opaque;

pbrook's avatar
pbrook committed
106
    qemu_set_irq(NVRAM->IRQ, 1);
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
    if ((NVRAM->buffer[0x1FF5] & 0x80) == 0 && 
	(NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
	(NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
	(NVRAM->buffer[0x1FF2] & 0x80) == 0) {
	/* Repeat once a month */
	get_time(NVRAM, &tm_now);
	memcpy(&tm, &tm_now, sizeof(struct tm));
	tm.tm_mon++;
	if (tm.tm_mon == 13) {
	    tm.tm_mon = 1;
	    tm.tm_year++;
	}
	next_time = mktime(&tm);
    } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
	       (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
	       (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
	       (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
	/* Repeat once a day */
	next_time = 24 * 60 * 60 + mktime(&tm_now);
    } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
	       (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
	       (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
	       (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
	/* Repeat once an hour */
	next_time = 60 * 60 + mktime(&tm_now);
    } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
	       (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
	       (NVRAM->buffer[0x1FF3] & 0x80) != 0 &&
	       (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
	/* Repeat once a minute */
	next_time = 60 + mktime(&tm_now);
    } else {
	/* Repeat once a second */
	next_time = 1 + mktime(&tm_now);
    }
    qemu_mod_timer(NVRAM->alrm_timer, next_time * 1000);
pbrook's avatar
pbrook committed
143
    qemu_set_irq(NVRAM->IRQ, 0);
144
145
146
147
148
}


static void get_alarm (m48t59_t *NVRAM, struct tm *tm)
{
bellard's avatar
bellard committed
149
150
151
#ifdef _WIN32
    memcpy(tm,localtime(&NVRAM->alarm),sizeof(*tm));
#else
152
153
154
155
    if (rtc_utc)
        gmtime_r (&NVRAM->alarm, tm);
    else
        localtime_r (&NVRAM->alarm, tm);
bellard's avatar
bellard committed
156
#endif
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
}

static void set_alarm (m48t59_t *NVRAM, struct tm *tm)
{
    NVRAM->alarm = mktime(tm);
    if (NVRAM->alrm_timer != NULL) {
        qemu_del_timer(NVRAM->alrm_timer);
	NVRAM->alrm_timer = NULL;
    }
    if (NVRAM->alarm - time(NULL) > 0)
	qemu_mod_timer(NVRAM->alrm_timer, NVRAM->alarm * 1000);
}

/* Watchdog management */
static void watchdog_cb (void *opaque)
{
    m48t59_t *NVRAM = opaque;

    NVRAM->buffer[0x1FF0] |= 0x80;
    if (NVRAM->buffer[0x1FF7] & 0x80) {
	NVRAM->buffer[0x1FF7] = 0x00;
	NVRAM->buffer[0x1FFC] &= ~0x40;
bellard's avatar
bellard committed
179
        /* May it be a hw CPU Reset instead ? */
bellard's avatar
bellard committed
180
        qemu_system_reset_request();
181
    } else {
pbrook's avatar
pbrook committed
182
183
	qemu_set_irq(NVRAM->IRQ, 1);
	qemu_set_irq(NVRAM->IRQ, 0);
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
    }
}

static void set_up_watchdog (m48t59_t *NVRAM, uint8_t value)
{
    uint64_t interval; /* in 1/16 seconds */

    if (NVRAM->wd_timer != NULL) {
        qemu_del_timer(NVRAM->wd_timer);
	NVRAM->wd_timer = NULL;
    }
    NVRAM->buffer[0x1FF0] &= ~0x80;
    if (value != 0) {
	interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F);
	qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) +
		       ((interval * 1000) >> 4));
    }
}

/* Direct access to NVRAM */
204
void m48t59_write (m48t59_t *NVRAM, uint32_t addr, uint32_t val)
205
206
207
208
{
    struct tm tm;
    int tmp;

209
210
211
212
213
214
    if (addr > 0x1FF8 && addr < 0x2000)
	NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
    if (NVRAM->type == 8 && 
        (addr >= 0x1ff0 && addr <= 0x1ff7))
        goto do_write;
    switch (addr) {
215
216
217
218
219
220
221
222
    case 0x1FF0:
        /* flags register : read-only */
        break;
    case 0x1FF1:
        /* unused */
        break;
    case 0x1FF2:
        /* alarm seconds */
223
224
225
226
227
228
229
        tmp = fromBCD(val & 0x7F);
        if (tmp >= 0 && tmp <= 59) {
            get_alarm(NVRAM, &tm);
            tm.tm_sec = tmp;
            NVRAM->buffer[0x1FF2] = val;
            set_alarm(NVRAM, &tm);
        }
230
231
232
        break;
    case 0x1FF3:
        /* alarm minutes */
233
234
235
236
237
238
239
        tmp = fromBCD(val & 0x7F);
        if (tmp >= 0 && tmp <= 59) {
            get_alarm(NVRAM, &tm);
            tm.tm_min = tmp;
            NVRAM->buffer[0x1FF3] = val;
            set_alarm(NVRAM, &tm);
        }
240
241
242
        break;
    case 0x1FF4:
        /* alarm hours */
243
244
245
246
247
248
249
        tmp = fromBCD(val & 0x3F);
        if (tmp >= 0 && tmp <= 23) {
            get_alarm(NVRAM, &tm);
            tm.tm_hour = tmp;
            NVRAM->buffer[0x1FF4] = val;
            set_alarm(NVRAM, &tm);
        }
250
251
252
        break;
    case 0x1FF5:
        /* alarm date */
253
254
255
256
257
258
259
        tmp = fromBCD(val & 0x1F);
        if (tmp != 0) {
            get_alarm(NVRAM, &tm);
            tm.tm_mday = tmp;
            NVRAM->buffer[0x1FF5] = val;
            set_alarm(NVRAM, &tm);
        }
260
261
262
        break;
    case 0x1FF6:
        /* interrupts */
263
        NVRAM->buffer[0x1FF6] = val;
264
265
266
        break;
    case 0x1FF7:
        /* watchdog */
267
268
        NVRAM->buffer[0x1FF7] = val;
        set_up_watchdog(NVRAM, val);
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
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
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
        break;
    case 0x1FF8:
        /* control */
	NVRAM->buffer[0x1FF8] = (val & ~0xA0) | 0x90;
        break;
    case 0x1FF9:
        /* seconds (BCD) */
	tmp = fromBCD(val & 0x7F);
	if (tmp >= 0 && tmp <= 59) {
	    get_time(NVRAM, &tm);
	    tm.tm_sec = tmp;
	    set_time(NVRAM, &tm);
	}
	if ((val & 0x80) ^ (NVRAM->buffer[0x1FF9] & 0x80)) {
	    if (val & 0x80) {
		NVRAM->stop_time = time(NULL);
	    } else {
		NVRAM->time_offset += NVRAM->stop_time - time(NULL);
		NVRAM->stop_time = 0;
	    }
	}
	NVRAM->buffer[0x1FF9] = val & 0x80;
        break;
    case 0x1FFA:
        /* minutes (BCD) */
	tmp = fromBCD(val & 0x7F);
	if (tmp >= 0 && tmp <= 59) {
	    get_time(NVRAM, &tm);
	    tm.tm_min = tmp;
	    set_time(NVRAM, &tm);
	}
        break;
    case 0x1FFB:
        /* hours (BCD) */
	tmp = fromBCD(val & 0x3F);
	if (tmp >= 0 && tmp <= 23) {
	    get_time(NVRAM, &tm);
	    tm.tm_hour = tmp;
	    set_time(NVRAM, &tm);
	}
        break;
    case 0x1FFC:
        /* day of the week / century */
	tmp = fromBCD(val & 0x07);
	get_time(NVRAM, &tm);
	tm.tm_wday = tmp;
	set_time(NVRAM, &tm);
        NVRAM->buffer[0x1FFC] = val & 0x40;
        break;
    case 0x1FFD:
        /* date */
	tmp = fromBCD(val & 0x1F);
	if (tmp != 0) {
	    get_time(NVRAM, &tm);
	    tm.tm_mday = tmp;
	    set_time(NVRAM, &tm);
	}
        break;
    case 0x1FFE:
        /* month */
	tmp = fromBCD(val & 0x1F);
	if (tmp >= 1 && tmp <= 12) {
	    get_time(NVRAM, &tm);
	    tm.tm_mon = tmp - 1;
	    set_time(NVRAM, &tm);
	}
        break;
    case 0x1FFF:
        /* year */
	tmp = fromBCD(val);
	if (tmp >= 0 && tmp <= 99) {
	    get_time(NVRAM, &tm);
341
342
343
344
            if (NVRAM->type == 8)
                tm.tm_year = fromBCD(val) + 68; // Base year is 1968
            else
                tm.tm_year = fromBCD(val);
345
346
347
348
	    set_time(NVRAM, &tm);
	}
        break;
    default:
bellard's avatar
bellard committed
349
        /* Check lock registers state */
350
        if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
bellard's avatar
bellard committed
351
            break;
352
        if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
bellard's avatar
bellard committed
353
            break;
354
355
356
    do_write:
        if (addr < NVRAM->size) {
            NVRAM->buffer[addr] = val & 0xFF;
357
358
359
360
361
	}
        break;
    }
}

362
uint32_t m48t59_read (m48t59_t *NVRAM, uint32_t addr)
363
364
365
366
{
    struct tm tm;
    uint32_t retval = 0xFF;

367
368
369
370
    if (NVRAM->type == 8 && 
        (addr >= 0x1ff0 && addr <= 0x1ff7))
        goto do_read;
    switch (addr) {
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
    case 0x1FF0:
        /* flags register */
	goto do_read;
    case 0x1FF1:
        /* unused */
	retval = 0;
        break;
    case 0x1FF2:
        /* alarm seconds */
	goto do_read;
    case 0x1FF3:
        /* alarm minutes */
	goto do_read;
    case 0x1FF4:
        /* alarm hours */
	goto do_read;
    case 0x1FF5:
        /* alarm date */
	goto do_read;
    case 0x1FF6:
        /* interrupts */
	goto do_read;
    case 0x1FF7:
	/* A read resets the watchdog */
	set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]);
	goto do_read;
    case 0x1FF8:
        /* control */
	goto do_read;
    case 0x1FF9:
        /* seconds (BCD) */
        get_time(NVRAM, &tm);
        retval = (NVRAM->buffer[0x1FF9] & 0x80) | toBCD(tm.tm_sec);
        break;
    case 0x1FFA:
        /* minutes (BCD) */
        get_time(NVRAM, &tm);
        retval = toBCD(tm.tm_min);
        break;
    case 0x1FFB:
        /* hours (BCD) */
        get_time(NVRAM, &tm);
        retval = toBCD(tm.tm_hour);
        break;
    case 0x1FFC:
        /* day of the week / century */
        get_time(NVRAM, &tm);
        retval = NVRAM->buffer[0x1FFC] | tm.tm_wday;
        break;
    case 0x1FFD:
        /* date */
        get_time(NVRAM, &tm);
        retval = toBCD(tm.tm_mday);
        break;
    case 0x1FFE:
        /* month */
        get_time(NVRAM, &tm);
        retval = toBCD(tm.tm_mon + 1);
        break;
    case 0x1FFF:
        /* year */
        get_time(NVRAM, &tm);
433
434
435
436
        if (NVRAM->type == 8) 
            retval = toBCD(tm.tm_year - 68); // Base year is 1968
        else
            retval = toBCD(tm.tm_year);
437
438
        break;
    default:
bellard's avatar
bellard committed
439
        /* Check lock registers state */
440
        if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
bellard's avatar
bellard committed
441
            break;
442
        if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
bellard's avatar
bellard committed
443
            break;
444
445
446
    do_read:
        if (addr < NVRAM->size) {
            retval = NVRAM->buffer[addr];
447
448
449
	}
        break;
    }
450
451
    if (addr > 0x1FF9 && addr < 0x2000)
	NVRAM_PRINTF("0x%08x <= 0x%08x\n", addr, retval);
452
453
454
455

    return retval;
}

456
void m48t59_set_addr (m48t59_t *NVRAM, uint32_t addr)
457
458
459
460
{
    NVRAM->addr = addr;
}

bellard's avatar
bellard committed
461
462
463
464
465
void m48t59_toggle_lock (m48t59_t *NVRAM, int lock)
{
    NVRAM->lock ^= 1 << lock;
}

466
467
468
469
470
471
/* IO access to NVRAM */
static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val)
{
    m48t59_t *NVRAM = opaque;

    addr -= NVRAM->io_base;
bellard's avatar
bellard committed
472
    NVRAM_PRINTF("0x%08x => 0x%08x\n", addr, val);
473
474
475
476
477
478
479
480
481
482
    switch (addr) {
    case 0:
        NVRAM->addr &= ~0x00FF;
        NVRAM->addr |= val;
        break;
    case 1:
        NVRAM->addr &= ~0xFF00;
        NVRAM->addr |= val << 8;
        break;
    case 3:
483
        m48t59_write(NVRAM, val, NVRAM->addr);
484
485
486
487
488
489
490
491
492
493
        NVRAM->addr = 0x0000;
        break;
    default:
        break;
    }
}

static uint32_t NVRAM_readb (void *opaque, uint32_t addr)
{
    m48t59_t *NVRAM = opaque;
bellard's avatar
bellard committed
494
    uint32_t retval;
495

bellard's avatar
bellard committed
496
497
498
    addr -= NVRAM->io_base;
    switch (addr) {
    case 3:
499
        retval = m48t59_read(NVRAM, NVRAM->addr);
bellard's avatar
bellard committed
500
501
502
503
504
505
        break;
    default:
        retval = -1;
        break;
    }
    NVRAM_PRINTF("0x%08x <= 0x%08x\n", addr, retval);
506

bellard's avatar
bellard committed
507
    return retval;
508
509
}

bellard's avatar
bellard committed
510
511
512
513
514
static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
{
    m48t59_t *NVRAM = opaque;
    
    addr -= NVRAM->mem_base;
515
    m48t59_write(NVRAM, addr, value & 0xff);
bellard's avatar
bellard committed
516
517
518
519
520
521
522
}

static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
{
    m48t59_t *NVRAM = opaque;
    
    addr -= NVRAM->mem_base;
523
524
    m48t59_write(NVRAM, addr, (value >> 8) & 0xff);
    m48t59_write(NVRAM, addr + 1, value & 0xff);
bellard's avatar
bellard committed
525
526
527
528
529
530
531
}

static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
{
    m48t59_t *NVRAM = opaque;
    
    addr -= NVRAM->mem_base;
532
533
534
535
    m48t59_write(NVRAM, addr, (value >> 24) & 0xff);
    m48t59_write(NVRAM, addr + 1, (value >> 16) & 0xff);
    m48t59_write(NVRAM, addr + 2, (value >> 8) & 0xff);
    m48t59_write(NVRAM, addr + 3, value & 0xff);
bellard's avatar
bellard committed
536
537
538
539
540
}

static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr)
{
    m48t59_t *NVRAM = opaque;
541
    uint32_t retval;
bellard's avatar
bellard committed
542
543
    
    addr -= NVRAM->mem_base;
544
    retval = m48t59_read(NVRAM, addr);
bellard's avatar
bellard committed
545
546
547
548
549
550
    return retval;
}

static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr)
{
    m48t59_t *NVRAM = opaque;
551
    uint32_t retval;
bellard's avatar
bellard committed
552
553
    
    addr -= NVRAM->mem_base;
554
555
    retval = m48t59_read(NVRAM, addr) << 8;
    retval |= m48t59_read(NVRAM, addr + 1);
bellard's avatar
bellard committed
556
557
558
559
560
561
    return retval;
}

static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr)
{
    m48t59_t *NVRAM = opaque;
562
    uint32_t retval;
bellard's avatar
bellard committed
563

564
565
566
567
568
    addr -= NVRAM->mem_base;
    retval = m48t59_read(NVRAM, addr) << 24;
    retval |= m48t59_read(NVRAM, addr + 1) << 16;
    retval |= m48t59_read(NVRAM, addr + 2) << 8;
    retval |= m48t59_read(NVRAM, addr + 3);
bellard's avatar
bellard committed
569
570
571
572
573
574
575
576
577
578
579
580
581
582
    return retval;
}

static CPUWriteMemoryFunc *nvram_write[] = {
    &nvram_writeb,
    &nvram_writew,
    &nvram_writel,
};

static CPUReadMemoryFunc *nvram_read[] = {
    &nvram_readb,
    &nvram_readw,
    &nvram_readl,
};
583

584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
static void m48t59_save(QEMUFile *f, void *opaque)
{
    m48t59_t *s = opaque;

    qemu_put_8s(f, &s->lock);
    qemu_put_be16s(f, &s->addr);
    qemu_put_buffer(f, s->buffer, s->size);
}

static int m48t59_load(QEMUFile *f, void *opaque, int version_id)
{
    m48t59_t *s = opaque;

    if (version_id != 1)
        return -EINVAL;

    qemu_get_8s(f, &s->lock);
    qemu_get_be16s(f, &s->addr);
    qemu_get_buffer(f, s->buffer, s->size);

    return 0;
}

static void m48t59_reset(void *opaque)
{
    m48t59_t *NVRAM = opaque;

    if (NVRAM->alrm_timer != NULL)
        qemu_del_timer(NVRAM->alrm_timer);

    if (NVRAM->wd_timer != NULL)
        qemu_del_timer(NVRAM->wd_timer);
}

618
/* Initialisation routine */
619
m48t59_t *m48t59_init (qemu_irq IRQ, target_phys_addr_t mem_base,
620
621
                       uint32_t io_base, uint16_t size,
                       int type)
622
{
623
    m48t59_t *s;
624
    target_phys_addr_t save_base;
625

626
627
    s = qemu_mallocz(sizeof(m48t59_t));
    if (!s)
628
	return NULL;
629
630
631
632
633
634
635
    s->buffer = qemu_mallocz(size);
    if (!s->buffer) {
        qemu_free(s);
        return NULL;
    }
    s->IRQ = IRQ;
    s->size = size;
bellard's avatar
bellard committed
636
    s->mem_base = mem_base;
637
638
    s->io_base = io_base;
    s->addr = 0;
639
640
641
642
643
    s->type = type;
    if (io_base != 0) {
        register_ioport_read(io_base, 0x04, 1, NVRAM_readb, s);
        register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, s);
    }
bellard's avatar
bellard committed
644
645
646
647
    if (mem_base != 0) {
        s->mem_index = cpu_register_io_memory(0, nvram_read, nvram_write, s);
        cpu_register_physical_memory(mem_base, 0x4000, s->mem_index);
    }
648
649
650
651
    if (type == 59) {
        s->alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, s);
        s->wd_timer = qemu_new_timer(vm_clock, &watchdog_cb, s);
    }
bellard's avatar
bellard committed
652
653
    s->lock = 0;

654
655
656
657
    qemu_register_reset(m48t59_reset, s);
    save_base = mem_base ? mem_base : io_base;
    register_savevm("m48t59", save_base, 1, m48t59_save, m48t59_load, s);

658
    return s;
659
}