2 * Emulation of processor ioports.
4 * Copyright 1995 Morten Welinder
5 * Copyright 1998 Andreas Mohr, Ove Kaaven
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23 - only a few ports are emulated.
24 - real-time clock in "cmos" is bogus. A nifty alarm() setup could
40 #include "wine/unicode.h"
41 #include "wine/debug.h"
43 WINE_DEFAULT_DEBUG_CHANNEL(int);
45 #if defined(linux) && defined(__i386__)
46 # define DIRECT_IO_ACCESS
48 # undef DIRECT_IO_ACCESS
49 #endif /* linux && __i386__ */
53 BOOL16 byte_toggle
; /* if TRUE, then hi byte has already been written */
59 {0xFFFF, FALSE
, 0, FALSE
, 0x36, 0},
60 {0x0012, FALSE
, 0, FALSE
, 0x74, 0},
61 {0x0001, FALSE
, 0, FALSE
, 0xB6, 0},
64 static int dummy_ctr
= 0;
66 static BYTE parport_8255
[4] = {0x4f, 0x20, 0xff, 0xff};
68 static BYTE cmosaddress
;
70 /* if you change anything here, use IO_FixCMOSCheckSum below to compute
71 * the checksum and put the right values in.
73 static BYTE cmosimage
[64] =
75 0x27, 0x34, 0x31, 0x47, 0x16, 0x15, 0x00, 0x01,
76 0x04, 0x94, 0x26, 0x02, 0x50, 0x80, 0x00, 0x00,
77 0x40, 0xb1, 0x00, 0x9c, 0x01, 0x80, 0x02, 0x00,
78 0x1c, 0x00, 0x00, 0xad, 0x02, 0x10, 0x00, 0x00,
79 0x08, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x00,
80 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x03, 0x19, /* last 2 bytes are checksum */
81 0x00, 0x1c, 0x19, 0x81, 0x00, 0x0e, 0x00, 0x80,
82 0x1b, 0x7b, 0x21, 0x00, 0x00, 0x00, 0x05, 0x5f
86 static void IO_FixCMOSCheckSum(void)
91 for (i
=0x10; i
< 0x2d; i
++)
93 cmosimage
[0x2e] = sum
>> 8; /* yes, this IS hi byte !! */
94 cmosimage
[0x2f] = sum
& 0xff;
95 MESSAGE("calculated hi %02x, lo %02x\n", cmosimage
[0x2e], cmosimage
[0x2f]);
99 #ifdef DIRECT_IO_ACCESS
101 extern int iopl(int level
);
102 static char do_direct_port_access
= -1;
103 static char port_permissions
[0x10000];
108 #endif /* DIRECT_IO_ACCESS */
111 static int do_pp_port_access
= -1; /* -1: uninitialized, 1: not available
115 static void set_timer_maxval(unsigned timer
, unsigned maxval
)
118 case 0: /* System timer counter divisor */
119 DOSVM_SetTimer(maxval
);
121 case 1: /* RAM refresh */
122 FIXME("RAM refresh counter handling not implemented !\n");
124 case 2: /* cassette & speaker */
126 if ((parport_8255
[1] & 3) == 3)
128 TRACE("Beep (freq: %d) !\n", 1193180 / maxval
);
129 Beep(1193180 / maxval
, 20);
136 /**********************************************************************
140 /* set_IO_permissions(int val1, int val)
141 * Helper function for IO_port_init
143 #ifdef DIRECT_IO_ACCESS
144 static void set_IO_permissions(int val1
, int val
, char rw
)
148 if (val
== -1) val
= 0x3ff;
149 for (j
= val1
; j
<= val
; j
++)
150 port_permissions
[j
] |= rw
;
152 do_direct_port_access
= 1;
155 } else if (val
!= -1) {
156 do_direct_port_access
= 1;
158 port_permissions
[val
] |= rw
;
163 /* do_IO_port_init_read_or_write(char* temp, char rw)
164 * Helper function for IO_port_init
167 static void do_IO_port_init_read_or_write(const WCHAR
*str
, char rw
)
172 static const WCHAR allW
[] = {'a','l','l',0};
174 if (!strcmpiW(str
, allW
))
176 for (i
=0; i
< sizeof(port_permissions
); i
++)
177 port_permissions
[i
] |= rw
;
190 set_IO_permissions(val1
, val
, rw
);
197 if (val1
== -1) val1
= 0;
203 val
= strtoulW( str
, &end
, 0 );
214 set_IO_permissions(val1
, val
, rw
);
218 static inline BYTE
inb( WORD port
)
221 __asm__
__volatile__( "inb %w1,%0" : "=a" (b
) : "d" (port
) );
225 static inline WORD
inw( WORD port
)
228 __asm__
__volatile__( "inw %w1,%0" : "=a" (w
) : "d" (port
) );
232 static inline DWORD
inl( WORD port
)
235 __asm__
__volatile__( "inl %w1,%0" : "=a" (dw
) : "d" (port
) );
239 static inline void outb( BYTE value
, WORD port
)
241 __asm__
__volatile__( "outb %b0,%w1" : : "a" (value
), "d" (port
) );
244 static inline void outw( WORD value
, WORD port
)
246 __asm__
__volatile__( "outw %w0,%w1" : : "a" (value
), "d" (port
) );
249 static inline void outl( DWORD value
, WORD port
)
251 __asm__
__volatile__( "outl %0,%w1" : : "a" (value
), "d" (port
) );
254 static void IO_port_init(void)
259 OBJECT_ATTRIBUTES attr
;
260 UNICODE_STRING nameW
;
262 static const WCHAR portsW
[] = {'S','o','f','t','w','a','r','e','\\',
263 'W','i','n','e','\\','V','D','M','\\','P','o','r','t','s',0};
264 static const WCHAR readW
[] = {'r','e','a','d',0};
265 static const WCHAR writeW
[] = {'w','r','i','t','e',0};
267 do_direct_port_access
= 0;
268 /* Can we do that? */
273 RtlOpenCurrentUser( KEY_ALL_ACCESS
, &root
);
274 attr
.Length
= sizeof(attr
);
275 attr
.RootDirectory
= root
;
276 attr
.ObjectName
= &nameW
;
278 attr
.SecurityDescriptor
= NULL
;
279 attr
.SecurityQualityOfService
= NULL
;
280 RtlInitUnicodeString( &nameW
, portsW
);
282 /* @@ Wine registry key: HKCU\Software\Wine\VDM\Ports */
283 if (!NtOpenKey( &hkey
, KEY_ALL_ACCESS
, &attr
))
285 RtlInitUnicodeString( &nameW
, readW
);
286 if (!NtQueryValueKey( hkey
, &nameW
, KeyValuePartialInformation
, tmp
, sizeof(tmp
), &dummy
))
288 WCHAR
*str
= (WCHAR
*)((KEY_VALUE_PARTIAL_INFORMATION
*)tmp
)->Data
;
289 do_IO_port_init_read_or_write(str
, IO_READ
);
291 RtlInitUnicodeString( &nameW
, writeW
);
292 if (!NtQueryValueKey( hkey
, &nameW
, KeyValuePartialInformation
, tmp
, sizeof(tmp
), &dummy
))
294 WCHAR
*str
= (WCHAR
*)((KEY_VALUE_PARTIAL_INFORMATION
*)tmp
)->Data
;
295 do_IO_port_init_read_or_write(str
, IO_WRITE
);
303 #endif /* DIRECT_IO_ACCESS */
306 /**********************************************************************
309 * Note: The size argument has to be handled correctly _externally_
310 * (as we always return a DWORD)
312 DWORD WINAPI
DOSVM_inport( int port
, int size
)
316 TRACE("%d-byte value from port 0x%04x\n", size
, port
);
319 if (do_pp_port_access
== -1) do_pp_port_access
=IO_pp_init();
320 if ((do_pp_port_access
== 0 ) && (size
== 1))
322 if (!IO_pp_inp(port
,&res
)) return res
;
326 #ifdef DIRECT_IO_ACCESS
327 if (do_direct_port_access
== -1) IO_port_init();
328 if ((do_direct_port_access
)
329 /* Make sure we have access to the port */
330 && (port_permissions
[port
] & IO_READ
))
335 case 1: res
= inb( port
); break;
336 case 2: res
= inw( port
); break;
337 case 4: res
= inl( port
); break;
350 BYTE chan
= port
& 3;
352 if (tmr_8253
[chan
].latched
)
353 tempval
= tmr_8253
[chan
].latch
;
356 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
357 if (chan
== 0) /* System timer counter divisor */
359 /* FIXME: DOSVM_GetTimer() returns quite rigid values */
360 tempval
= dummy_ctr
+ (WORD
)DOSVM_GetTimer();
364 /* FIXME: intelligent hardware timer emulation needed */
369 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
372 res
= 0; /* shouldn't happen? */
374 case 1: /* read lo byte */
376 tmr_8253
[chan
].latched
= FALSE
;
378 case 3: /* read lo byte, then hi byte */
379 tmr_8253
[chan
].byte_toggle
^= 1; /* toggle */
380 if (tmr_8253
[chan
].byte_toggle
)
385 /* else [fall through if read hi byte !] */
386 case 2: /* read hi byte */
387 res
= (BYTE
)(tempval
>> 8);
388 tmr_8253
[chan
].latched
= FALSE
;
394 res
= DOSVM_Int09ReadScan(NULL
);
397 res
= (DWORD
)parport_8255
[1];
400 res
= (DWORD
)parport_8255
[2];
403 res
= (DWORD
)cmosaddress
;
406 res
= (DWORD
)cmosimage
[cmosaddress
& 0x3f];
410 res
= ~0U; /* no joystick */
415 res
= (DWORD
)SB_ioport_in( port
);
417 /* VGA read registers */
418 case 0x3b4: /* CRT Controller Register - Index (MDA) */
419 case 0x3b5: /* CRT Controller Register - Other (MDA) */
420 case 0x3ba: /* General Register - Input status 1 (MDA) */
421 case 0x3c0: /* Attribute Controller - Address */
422 case 0x3c1: /* Attribute Controller - Other */
423 case 0x3c2: /* General Register - Input status 0 */
424 case 0x3c3: /* General Register - Video subsystem enable */
425 case 0x3c4: /* Sequencer Register - Address */
426 case 0x3c5: /* Sequencer Register - Other */
428 case 0x3c7: /* General Register - DAC State */
431 case 0x3ca: /* General Register - Feature control */
433 case 0x3cc: /* General Register - Misc output */
435 case 0x3ce: /* Graphics Controller Register - Address */
436 case 0x3cf: /* Graphics Controller Register - Other */
441 case 0x3d4: /* CRT Controller Register - Index (CGA) */
442 case 0x3d5: /* CRT Controller Register - Other (CGA) */
454 FIXME("Trying to read more than one byte from VGA!\n");
455 res
= (DWORD
)VGA_ioport_in( port
);
491 res
= (DWORD
)DMA_ioport_in( port
);
494 WARN("Direct I/O read attempted from port %x\n", port
);
501 /**********************************************************************
502 * outport (WINEDOS.@)
504 void WINAPI
DOSVM_outport( int port
, int size
, DWORD value
)
506 TRACE("IO: 0x%x (%d-byte value) to port 0x%04x\n", value
, size
, port
);
509 if (do_pp_port_access
== -1) do_pp_port_access
= IO_pp_init();
510 if ((do_pp_port_access
== 0) && (size
== 1))
512 if (!IO_pp_outp(port
,&value
)) return;
516 #ifdef DIRECT_IO_ACCESS
518 if (do_direct_port_access
== -1) IO_port_init();
519 if ((do_direct_port_access
)
520 /* Make sure we have access to the port */
521 && (port_permissions
[port
] & IO_WRITE
))
526 case 1: outb( LOBYTE(value
), port
); break;
527 case 2: outw( LOWORD(value
), port
); break;
528 case 4: outl( value
, port
); break;
538 DOSVM_PIC_ioport_out( port
, (BYTE
)value
);
544 BYTE chan
= port
& 3;
546 /* we need to get the oldval before any lo/hi byte change has been made */
547 if (((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
548 !tmr_8253
[chan
].byte_toggle
)
549 tmr_8253
[chan
].oldval
= tmr_8253
[chan
].countmax
;
550 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
553 break; /* shouldn't happen? */
554 case 1: /* write lo byte */
555 tmr_8253
[chan
].countmax
=
556 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
558 case 3: /* write lo byte, then hi byte */
559 tmr_8253
[chan
].byte_toggle
^= TRUE
; /* toggle */
560 if (tmr_8253
[chan
].byte_toggle
)
562 tmr_8253
[chan
].countmax
=
563 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
566 /* else [fall through if write hi byte !] */
567 case 2: /* write hi byte */
568 tmr_8253
[chan
].countmax
=
569 (tmr_8253
[chan
].countmax
& 0x00ff) | ((BYTE
)value
<< 8);
572 /* if programming is finished and value has changed
573 then update to new value */
574 if ((((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
575 !tmr_8253
[chan
].byte_toggle
) &&
576 (tmr_8253
[chan
].countmax
!= tmr_8253
[chan
].oldval
))
577 set_timer_maxval(chan
, tmr_8253
[chan
].countmax
);
582 BYTE chan
= ((BYTE
)value
& 0xc0) >> 6;
583 /* ctrl byte for specific timer channel */
586 FIXME("8254 timer readback not implemented yet\n");
589 switch (((BYTE
)value
& 0x30) >> 4)
591 case 0: /* latch timer */
592 tmr_8253
[chan
].latched
= TRUE
;
593 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
594 if (chan
== 0) /* System timer divisor */
595 tmr_8253
[chan
].latch
= dummy_ctr
+ (WORD
)DOSVM_GetTimer();
598 /* FIXME: intelligent hardware timer emulation needed */
599 tmr_8253
[chan
].latch
= dummy_ctr
;
602 case 3: /* write lo byte, then hi byte */
603 tmr_8253
[chan
].byte_toggle
= FALSE
; /* init */
605 case 1: /* write lo byte only */
606 case 2: /* write hi byte only */
607 tmr_8253
[chan
].ctrlbyte_ch
= (BYTE
)value
;
613 parport_8255
[1] = (BYTE
)value
;
614 if (((parport_8255
[1] & 3) == 3) && (tmr_8253
[2].countmax
!= 1))
616 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253
[2].countmax
);
617 Beep(1193180 / tmr_8253
[2].countmax
, 20);
621 cmosaddress
= (BYTE
)value
& 0x7f;
624 cmosimage
[cmosaddress
& 0x3f] = (BYTE
)value
;
628 SB_ioport_out( port
, (BYTE
)value
);
630 /* VGA Write registers */
631 case 0x3b4: /* CRT Controller Register - Index (MDA) */
632 case 0x3b5: /* CRT Controller Register - Other (MDA) */
633 case 0x3ba: /* General Register - Feature Control */
634 case 0x3c0: /* Attribute Controller - Address/Other */
636 case 0x3c2: /* General Register - Misc output */
637 case 0x3c3: /* General Register - Video subsystem enable */
638 case 0x3c4: /* Sequencer Register - Address */
639 case 0x3c5: /* Sequencer Register - Other */
648 case 0x3ce: /* Graphics Controller Register - Address */
649 case 0x3cf: /* Graphics Controller Register - Other */
654 case 0x3d4: /* CRT Controller Register - Index (CGA) */
655 case 0x3d5: /* CRT Controller Register - Other (CGA) */
666 VGA_ioport_out( port
, LOBYTE(value
) );
668 VGA_ioport_out( port
+1, HIBYTE(value
) );
670 VGA_ioport_out( port
+2, LOBYTE(HIWORD(value
)) );
671 VGA_ioport_out( port
+3, HIBYTE(HIWORD(value
)) );
721 DMA_ioport_out( port
, (BYTE
)value
);
724 WARN("Direct I/O write attempted to port %x\n", port
);