summaryrefslogtreecommitdiffstats
path: root/drivers/bios_emulator/besys.c
blob: 8e29a9eafec6f1e7adf2096140da171bfe2eeec0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
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
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
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
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
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
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
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
/****************************************************************************
*
*                        BIOS emulator and interface
*                      to Realmode X86 Emulator Library
*
*  ========================================================================
*
*   Copyright (C) 2007 Freescale Semiconductor, Inc.
*   Jason Jin<Jason.jin@freescale.com>
*
*   Copyright (C) 1991-2004 SciTech Software, Inc. All rights reserved.
*
*   This file may be distributed and/or modified under the terms of the
*   GNU General Public License version 2.0 as published by the Free
*   Software Foundation and appearing in the file LICENSE.GPL included
*   in the packaging of this file.
*
*   Licensees holding a valid Commercial License for this product from
*   SciTech Software, Inc. may use this file in accordance with the
*   Commercial License Agreement provided with the Software.
*
*   This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
*   THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
*   PURPOSE.
*
*   See http://www.scitechsoft.com/license/ for information about
*   the licensing options available and how to purchase a Commercial
*   License Agreement.
*
*   Contact license@scitechsoft.com if any conditions of this licensing
*   are not clear to you, or you have questions about licensing options.
*
*  ========================================================================
*
* Language:     ANSI C
* Environment:  Any
* Developer:    Kendall Bennett
*
* Description:  This file includes BIOS emulator I/O and memory access
*               functions.
*
*		Jason ported this file to u-boot to run the ATI video card
*		BIOS in u-boot. Removed some emulate functions such as the
*		timer port access. Made all the VGA port except reading 0x3c3
*		be emulated. Seems like reading 0x3c3 should return the high
*		16 bit of the io port.
*
****************************************************************************/

#define __io
#include <asm/io.h>
#include <common.h>
#include "biosemui.h"

/*------------------------- Global Variables ------------------------------*/

#ifndef CONFIG_X86EMU_RAW_IO
static char *BE_biosDate = "08/14/99";
static u8 BE_model = 0xFC;
static u8 BE_submodel = 0x00;
#endif

/*----------------------------- Implementation ----------------------------*/

/****************************************************************************
PARAMETERS:
addr    - Emulator memory address to convert

RETURNS:
Actual memory address to read or write the data

REMARKS:
This function converts an emulator memory address in a 32-bit range to
a real memory address that we wish to access. It handles splitting up the
memory address space appropriately to access the emulator BIOS image, video
memory and system BIOS etc.
****************************************************************************/
static u8 *BE_memaddr(u32 addr)
{
	if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
		return (u8*)(_BE_env.biosmem_base + addr - 0xC0000);
	} else if (addr > _BE_env.biosmem_limit && addr < 0xD0000) {
		DB(printf("BE_memaddr: address %#lx may be invalid!\n",
			  (ulong)addr);)
		return (u8 *)M.mem_base;
	} else if (addr >= 0xA0000 && addr <= 0xBFFFF) {
		return (u8*)(_BE_env.busmem_base + addr - 0xA0000);
	}
#ifdef CONFIG_X86EMU_RAW_IO
	else if (addr >= 0xD0000 && addr <= 0xFFFFF) {
		/* We map the real System BIOS directly on real PC's */
		DB(printf("BE_memaddr: System BIOS address %#lx\n",
			  (ulong)addr);)
		    return (u8 *)_BE_env.busmem_base + addr - 0xA0000;
	}
#else
	else if (addr >= 0xFFFF5 && addr < 0xFFFFE) {
		/* Return a faked BIOS date string for non-x86 machines */
		DB(printf("BE_memaddr - Returning BIOS date\n");)
		return (u8 *)(BE_biosDate + addr - 0xFFFF5);
	} else if (addr == 0xFFFFE) {
		/* Return system model identifier for non-x86 machines */
		DB(printf("BE_memaddr - Returning model\n");)
		return &BE_model;
	} else if (addr == 0xFFFFF) {
		/* Return system submodel identifier for non-x86 machines */
		DB(printf("BE_memaddr - Returning submodel\n");)
		return &BE_submodel;
	}
#endif
	else if (addr > M.mem_size - 1) {
		HALT_SYS();
		return (u8 *)M.mem_base;
	}

	return (u8 *)(M.mem_base + addr);
}

/****************************************************************************
PARAMETERS:
addr    - Emulator memory address to read

RETURNS:
Byte value read from emulator memory.

REMARKS:
Reads a byte value from the emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
u8 X86API BE_rdb(u32 addr)
{
	if (_BE_env.emulateVGA && addr >= 0xA0000 && addr <= 0xBFFFF)
		return 0;
	else {
		u8 val = readb_le(BE_memaddr(addr));
		return val;
	}
}

/****************************************************************************
PARAMETERS:
addr    - Emulator memory address to read

RETURNS:
Word value read from emulator memory.

REMARKS:
Reads a word value from the emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
u16 X86API BE_rdw(u32 addr)
{
	if (_BE_env.emulateVGA && addr >= 0xA0000 && addr <= 0xBFFFF)
		return 0;
	else {
		u8 *base = BE_memaddr(addr);
		u16 val = readw_le(base);
		return val;
	}
}

/****************************************************************************
PARAMETERS:
addr    - Emulator memory address to read

RETURNS:
Long value read from emulator memory.

REMARKS:
Reads a 32-bit value from the emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
u32 X86API BE_rdl(u32 addr)
{
	if (_BE_env.emulateVGA && addr >= 0xA0000 && addr <= 0xBFFFF)
		return 0;
	else {
		u8 *base = BE_memaddr(addr);
		u32 val = readl_le(base);
		return val;
	}
}

/****************************************************************************
PARAMETERS:
addr    - Emulator memory address to read
val     - Value to store

REMARKS:
Writes a byte value to emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
void X86API BE_wrb(u32 addr, u8 val)
{
	if (!(_BE_env.emulateVGA && addr >= 0xA0000 && addr <= 0xBFFFF)) {
		writeb_le(BE_memaddr(addr), val);
	}
}

/****************************************************************************
PARAMETERS:
addr    - Emulator memory address to read
val     - Value to store

REMARKS:
Writes a word value to emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
void X86API BE_wrw(u32 addr, u16 val)
{
	if (!(_BE_env.emulateVGA && addr >= 0xA0000 && addr <= 0xBFFFF)) {
		u8 *base = BE_memaddr(addr);
		writew_le(base, val);

	}
}

/****************************************************************************
PARAMETERS:
addr    - Emulator memory address to read
val     - Value to store

REMARKS:
Writes a 32-bit value to emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
void X86API BE_wrl(u32 addr, u32 val)
{
	if (!(_BE_env.emulateVGA && addr >= 0xA0000 && addr <= 0xBFFFF)) {
		u8 *base = BE_memaddr(addr);
		writel_le(base, val);
	}
}

#if !defined(CONFIG_X86EMU_RAW_IO)

/* For Non-Intel machines we may need to emulate some I/O port accesses that
 * the BIOS may try to access, such as the PCI config registers.
 */

#define IS_TIMER_PORT(port) (0x40 <= port && port <= 0x43)
#define IS_CMOS_PORT(port)  (0x70 <= port && port <= 0x71)
/*#define IS_VGA_PORT(port)   (_BE_env.emulateVGA && 0x3C0 <= port && port <= 0x3DA)*/
#define IS_VGA_PORT(port)   (0x3C0 <= port && port <= 0x3DA)
#define IS_PCI_PORT(port)   (0xCF8 <= port && port <= 0xCFF)
#define IS_SPKR_PORT(port)  (port == 0x61)

/****************************************************************************
PARAMETERS:
port    - Port to read from
type    - Type of access to perform

REMARKS:
Performs an emulated read from the Standard VGA I/O ports. If the target
hardware does not support mapping the VGA I/O and memory (such as some
PowerPC systems), we emulate the VGA so that the BIOS will still be able to
set NonVGA display modes such as on ATI hardware.
****************************************************************************/
static u8 VGA_inpb (const int port)
{
	u8 val = 0xff;

	switch (port) {
	case 0x3C0:
		/* 3C0 has funky characteristics because it can act as either
		   a data register or index register depending on the state
		   of an internal flip flop in the hardware. Hence we have
		   to emulate that functionality in here. */
		if (_BE_env.flipFlop3C0 == 0) {
			/* Access 3C0 as index register */
			val = _BE_env.emu3C0;
		} else {
			/* Access 3C0 as data register */
			if (_BE_env.emu3C0 < ATT_C)
				val = _BE_env.emu3C1[_BE_env.emu3C0];
		}
		_BE_env.flipFlop3C0 ^= 1;
		break;
	case 0x3C1:
		if (_BE_env.emu3C0 < ATT_C)
			return _BE_env.emu3C1[_BE_env.emu3C0];
		break;
	case 0x3CC:
		return _BE_env.emu3C2;
	case 0x3C4:
		return _BE_env.emu3C4;
	case 0x3C5:
		if (_BE_env.emu3C4 < ATT_C)
			return _BE_env.emu3C5[_BE_env.emu3C4];
		break;
	case 0x3C6:
		return _BE_env.emu3C6;
	case 0x3C7:
		return _BE_env.emu3C7;
	case 0x3C8:
		return _BE_env.emu3C8;
	case 0x3C9:
		if (_BE_env.emu3C7 < PAL_C)
			return _BE_env.emu3C9[_BE_env.emu3C7++];
		break;
	case 0x3CE:
		return _BE_env.emu3CE;
	case 0x3CF:
		if (_BE_env.emu3CE < GRA_C)
			return _BE_env.emu3CF[_BE_env.emu3CE];
		break;
	case 0x3D4:
		if (_BE_env.emu3C2 & 0x1)
			return _BE_env.emu3D4;
		break;
	case 0x3D5:
		if ((_BE_env.emu3C2 & 0x1) && (_BE_env.emu3D4 < CRT_C))
			return _BE_env.emu3D5[_BE_env.emu3D4];
		break;
	case 0x3DA:
		_BE_env.flipFlop3C0 = 0;
		val = _BE_env.emu3DA;
		_BE_env.emu3DA ^= 0x9;
		break;
	}
	return val;
}

/****************************************************************************
PARAMETERS:
port    - Port to write to
type    - Type of access to perform

REMARKS:
Performs an emulated write to one of the 8253 timer registers. For now
we only emulate timer 0 which is the only timer that the BIOS code appears
to use.
****************************************************************************/
static void VGA_outpb (int port, u8 val)
{
	switch (port) {
	case 0x3C0:
		/* 3C0 has funky characteristics because it can act as either
		   a data register or index register depending on the state
		   of an internal flip flop in the hardware. Hence we have
		   to emulate that functionality in here. */
		if (_BE_env.flipFlop3C0 == 0) {
			/* Access 3C0 as index register */
			_BE_env.emu3C0 = val;
		} else {
			/* Access 3C0 as data register */
			if (_BE_env.emu3C0 < ATT_C)
				_BE_env.emu3C1[_BE_env.emu3C0] = val;
		}
		_BE_env.flipFlop3C0 ^= 1;
		break;
	case 0x3C2:
		_BE_env.emu3C2 = val;
		break;
	case 0x3C4:
		_BE_env.emu3C4 = val;
		break;
	case 0x3C5:
		if (_BE_env.emu3C4 < ATT_C)
			_BE_env.emu3C5[_BE_env.emu3C4] = val;
		break;
	case 0x3C6:
		_BE_env.emu3C6 = val;
		break;
	case 0x3C7:
		_BE_env.emu3C7 = (int) val *3;

		break;
	case 0x3C8:
		_BE_env.emu3C8 = (int) val *3;

		break;
	case 0x3C9:
		if (_BE_env.emu3C8 < PAL_C)
			_BE_env.emu3C9[_BE_env.emu3C8++] = val;
		break;
	case 0x3CE:
		_BE_env.emu3CE = val;
		break;
	case 0x3CF:
		if (_BE_env.emu3CE < GRA_C)
			_BE_env.emu3CF[_BE_env.emu3CE] = val;
		break;
	case 0x3D4:
		if (_BE_env.emu3C2 & 0x1)
			_BE_env.emu3D4 = val;
		break;
	case 0x3D5:
		if ((_BE_env.emu3C2 & 0x1) && (_BE_env.emu3D4 < CRT_C))
			_BE_env.emu3D5[_BE_env.emu3D4] = val;
		break;
	}
}

/****************************************************************************
PARAMETERS:
regOffset   - Offset into register space for non-DWORD accesses
value       - Value to write to register for PCI_WRITE_* operations
func        - Function to perform (PCIAccessRegFlags)

RETURNS:
Value read from configuration register for PCI_READ_* operations

REMARKS:
Accesses a PCI configuration space register by decoding the value currently
stored in the _BE_env.configAddress variable and passing it through to the
portable PCI_accessReg function.
****************************************************************************/
static u32 BE_accessReg(int regOffset, u32 value, int func)
{
#ifdef __KERNEL__
	int function, device, bus;
	u8 val8;
	u16 val16;
	u32 val32;


	/* Decode the configuration register values for the register we wish to
	 * access
	 */
	regOffset += (_BE_env.configAddress & 0xFF);
	function = (_BE_env.configAddress >> 8) & 0x7;
	device = (_BE_env.configAddress >> 11) & 0x1F;
	bus = (_BE_env.configAddress >> 16) & 0xFF;

	/* Ignore accesses to all devices other than the one we're POSTing */
	if ((function == _BE_env.vgaInfo.function) &&
	    (device == _BE_env.vgaInfo.device) &&
	    (bus == _BE_env.vgaInfo.bus)) {
		switch (func) {
		case REG_READ_BYTE:
			pci_read_config_byte(_BE_env.vgaInfo.pcidev, regOffset,
					     &val8);
			return val8;
		case REG_READ_WORD:
			pci_read_config_word(_BE_env.vgaInfo.pcidev, regOffset,
					     &val16);
			return val16;
		case REG_READ_DWORD:
			pci_read_config_dword(_BE_env.vgaInfo.pcidev, regOffset,
					      &val32);
			return val32;
		case REG_WRITE_BYTE:
			pci_write_config_byte(_BE_env.vgaInfo.pcidev, regOffset,
					      value);

			return 0;
		case REG_WRITE_WORD:
			pci_write_config_word(_BE_env.vgaInfo.pcidev, regOffset,
					      value);

			return 0;
		case REG_WRITE_DWORD:
			pci_write_config_dword(_BE_env.vgaInfo.pcidev,
					       regOffset, value);

			return 0;
		}
	}
	return 0;
#else
	PCIDeviceInfo pciInfo;

	pciInfo.mech1 = 1;
	pciInfo.slot.i = 0;
	pciInfo.slot.p.Function = (_BE_env.configAddress >> 8) & 0x7;
	pciInfo.slot.p.Device = (_BE_env.configAddress >> 11) & 0x1F;
	pciInfo.slot.p.Bus = (_BE_env.configAddress >> 16) & 0xFF;
	pciInfo.slot.p.Enable = 1;

	/* Ignore accesses to all devices other than the one we're POSTing */
	if ((pciInfo.slot.p.Function ==
	     _BE_env.vgaInfo.pciInfo->slot.p.Function)
	    && (pciInfo.slot.p.Device == _BE_env.vgaInfo.pciInfo->slot.p.Device)
	    && (pciInfo.slot.p.Bus == _BE_env.vgaInfo.pciInfo->slot.p.Bus))
		return PCI_accessReg((_BE_env.configAddress & 0xFF) + regOffset,
				     value, func, &pciInfo);
	return 0;
#endif
}

/****************************************************************************
PARAMETERS:
port    - Port to read from
type    - Type of access to perform

REMARKS:
Performs an emulated read from one of the PCI configuration space registers.
We emulate this using our PCI_accessReg function which will access the PCI
configuration space registers in a portable fashion.
****************************************************************************/
static u32 PCI_inp(int port, int type)
{
	switch (type) {
	case REG_READ_BYTE:
		if ((_BE_env.configAddress & 0x80000000) && 0xCFC <= port
		    && port <= 0xCFF)
			return BE_accessReg(port - 0xCFC, 0, REG_READ_BYTE);
		break;
	case REG_READ_WORD:
		if ((_BE_env.configAddress & 0x80000000) && 0xCFC <= port
		    && port <= 0xCFF)
			return BE_accessReg(port - 0xCFC, 0, REG_READ_WORD);
		break;
	case REG_READ_DWORD:
		if (port == 0xCF8)
			return _BE_env.configAddress;
		else if ((_BE_env.configAddress & 0x80000000) && port == 0xCFC)
			return BE_accessReg(0, 0, REG_READ_DWORD);
		break;
	}
	return 0;
}

/****************************************************************************
PARAMETERS:
port    - Port to write to
type    - Type of access to perform

REMARKS:
Performs an emulated write to one of the PCI control registers.
****************************************************************************/
static void PCI_outp(int port, u32 val, int type)
{
	switch (type) {
	case REG_WRITE_BYTE:
		if ((_BE_env.configAddress & 0x80000000) && 0xCFC <= port
		    && port <= 0xCFF)
			BE_accessReg(port - 0xCFC, val, REG_WRITE_BYTE);
		break;
	case REG_WRITE_WORD:
		if ((_BE_env.configAddress & 0x80000000) && 0xCFC <= port
		    && port <= 0xCFF)
			BE_accessReg(port - 0xCFC, val, REG_WRITE_WORD);
		break;
	case REG_WRITE_DWORD:
		if (port == 0xCF8)
		{
			_BE_env.configAddress = val & 0x80FFFFFC;
		}
		else if ((_BE_env.configAddress & 0x80000000) && port == 0xCFC)
			BE_accessReg(0, val, REG_WRITE_DWORD);
		break;
	}
}

#endif

/****************************************************************************
PARAMETERS:
port    - Port to write to

RETURNS:
Value read from the I/O port

REMARKS:
Performs an emulated 8-bit read from an I/O port. We handle special cases
that we need to emulate in here, and fall through to reflecting the write
through to the real hardware if we don't need to special case it.
****************************************************************************/
u8 X86API BE_inb(X86EMU_pioAddr port)
{
	u8 val = 0;

#if !defined(CONFIG_X86EMU_RAW_IO)
	if (IS_VGA_PORT(port)){
		/*seems reading port 0x3c3 return the high 16 bit of io port*/
		if(port == 0x3c3)
			val = LOG_inpb(port);
		else
			val = VGA_inpb(port);
	}
	else if (IS_TIMER_PORT(port))
		DB(printf("Can not interept TIMER port now!\n");)
	else if (IS_SPKR_PORT(port))
		DB(printf("Can not interept SPEAKER port now!\n");)
	else if (IS_CMOS_PORT(port))
		DB(printf("Can not interept CMOS port now!\n");)
	else if (IS_PCI_PORT(port))
		val = PCI_inp(port, REG_READ_BYTE);
	else if (port < 0x100) {
		DB(printf("WARN: INVALID inb.%04X -> %02X\n", (u16) port, val);)
		val = LOG_inpb(port);
	} else
#endif
		val = LOG_inpb(port);
	return val;
}

/****************************************************************************
PARAMETERS:
port    - Port to write to

RETURNS:
Value read from the I/O port

REMARKS:
Performs an emulated 16-bit read from an I/O port. We handle special cases
that we need to emulate in here, and fall through to reflecting the write
through to the real hardware if we don't need to special case it.
****************************************************************************/
u16 X86API BE_inw(X86EMU_pioAddr port)
{
	u16 val = 0;

#if !defined(CONFIG_X86EMU_RAW_IO)
	if (IS_PCI_PORT(port))
		val = PCI_inp(port, REG_READ_WORD);
	else if (port < 0x100) {
		DB(printf("WARN: Maybe INVALID inw.%04X -> %04X\n", (u16) port, val);)
		val = LOG_inpw(port);
	} else
#endif
		val = LOG_inpw(port);
	return val;
}

/****************************************************************************
PARAMETERS:
port    - Port to write to

RETURNS:
Value read from the I/O port

REMARKS:
Performs an emulated 32-bit read from an I/O port. We handle special cases
that we need to emulate in here, and fall through to reflecting the write
through to the real hardware if we don't need to special case it.
****************************************************************************/
u32 X86API BE_inl(X86EMU_pioAddr port)
{
	u32 val = 0;

#if !defined(CONFIG_X86EMU_RAW_IO)
	if (IS_PCI_PORT(port))
		val = PCI_inp(port, REG_READ_DWORD);
	else if (port < 0x100) {
		val = LOG_inpd(port);
	} else
#endif
		val = LOG_inpd(port);
	return val;
}

/****************************************************************************
PARAMETERS:
port    - Port to write to
val     - Value to write to port

REMARKS:
Performs an emulated 8-bit write to an I/O port. We handle special cases
that we need to emulate in here, and fall through to reflecting the write
through to the real hardware if we don't need to special case it.
****************************************************************************/
void X86API BE_outb(X86EMU_pioAddr port, u8 val)
{
#if !defined(CONFIG_X86EMU_RAW_IO)
	if (IS_VGA_PORT(port))
		VGA_outpb(port, val);
	else if (IS_TIMER_PORT(port))
		DB(printf("Can not interept TIMER port now!\n");)
	else if (IS_SPKR_PORT(port))
		DB(printf("Can not interept SPEAKER port now!\n");)
	else if (IS_CMOS_PORT(port))
		DB(printf("Can not interept CMOS port now!\n");)
	else if (IS_PCI_PORT(port))
		PCI_outp(port, val, REG_WRITE_BYTE);
	else if (port < 0x100) {
		DB(printf("WARN:Maybe INVALID outb.%04X <- %02X\n", (u16) port, val);)
		LOG_outpb(port, val);
	} else
#endif
		LOG_outpb(port, val);
}

/****************************************************************************
PARAMETERS:
port    - Port to write to
val     - Value to write to port

REMARKS:
Performs an emulated 16-bit write to an I/O port. We handle special cases
that we need to emulate in here, and fall through to reflecting the write
through to the real hardware if we don't need to special case it.
****************************************************************************/
void X86API BE_outw(X86EMU_pioAddr port, u16 val)
{
#if !defined(CONFIG_X86EMU_RAW_IO)
		if (IS_VGA_PORT(port)) {
			VGA_outpb(port, val);
			VGA_outpb(port + 1, val >> 8);
		} else if (IS_PCI_PORT(port))
			PCI_outp(port, val, REG_WRITE_WORD);
		else if (port < 0x100) {
			DB(printf("WARN: MAybe INVALID outw.%04X <- %04X\n", (u16) port,
			       val);)
			LOG_outpw(port, val);
		} else
#endif
			LOG_outpw(port, val);
}

/****************************************************************************
PARAMETERS:
port    - Port to write to
val     - Value to write to port

REMARKS:
Performs an emulated 32-bit write to an I/O port. We handle special cases
that we need to emulate in here, and fall through to reflecting the write
through to the real hardware if we don't need to special case it.
****************************************************************************/
void X86API BE_outl(X86EMU_pioAddr port, u32 val)
{
#if !defined(CONFIG_X86EMU_RAW_IO)
	if (IS_PCI_PORT(port)) {
		PCI_outp(port, val, REG_WRITE_DWORD);
	} else if (port < 0x100) {
		DB(printf("WARN: INVALID outl.%04X <- %08X\n", (u16) port,val);)
		LOG_outpd(port, val);
	} else
#endif
		LOG_outpd(port, val);
}
OpenPOWER on IntegriCloud