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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
)
171 static const WCHAR allW
[] = {'a','l','l',0};
173 if (!strcmpiW(str
, allW
))
175 for (i
=0; i
< sizeof(port_permissions
); i
++)
176 port_permissions
[i
] |= rw
;
189 set_IO_permissions(val1
, val
, rw
);
196 if (val1
== -1) val1
= 0;
202 val
= strtoulW( str
, &end
, 0 );
213 set_IO_permissions(val1
, val
, rw
);
217 static inline BYTE
inb( WORD port
)
220 __asm__
__volatile__( "inb %w1,%0" : "=a" (b
) : "d" (port
) );
224 static inline WORD
inw( WORD port
)
227 __asm__
__volatile__( "inw %w1,%0" : "=a" (w
) : "d" (port
) );
231 static inline DWORD
inl( WORD port
)
234 __asm__
__volatile__( "inl %w1,%0" : "=a" (dw
) : "d" (port
) );
238 static inline void outb( BYTE value
, WORD port
)
240 __asm__
__volatile__( "outb %b0,%w1" : : "a" (value
), "d" (port
) );
243 static inline void outw( WORD value
, WORD port
)
245 __asm__
__volatile__( "outw %w0,%w1" : : "a" (value
), "d" (port
) );
248 static inline void outl( DWORD value
, WORD port
)
250 __asm__
__volatile__( "outl %0,%w1" : : "a" (value
), "d" (port
) );
253 static void IO_port_init(void)
258 OBJECT_ATTRIBUTES attr
;
259 UNICODE_STRING nameW
;
261 static const WCHAR portsW
[] = {'M','a','c','h','i','n','e','\\',
262 'S','o','f','t','w','a','r','e','\\',
263 'W','i','n','e','\\','W','i','n','e','\\',
264 'C','o','n','f','i','g','\\','P','o','r','t','s',0};
265 static const WCHAR readW
[] = {'r','e','a','d',0};
266 static const WCHAR writeW
[] = {'w','r','i','t','e',0};
268 do_direct_port_access
= 0;
269 /* Can we do that? */
274 attr
.Length
= sizeof(attr
);
275 attr
.RootDirectory
= 0;
276 attr
.ObjectName
= &nameW
;
278 attr
.SecurityDescriptor
= NULL
;
279 attr
.SecurityQualityOfService
= NULL
;
280 RtlInitUnicodeString( &nameW
, portsW
);
282 if (!NtOpenKey( &hkey
, KEY_ALL_ACCESS
, &attr
))
284 RtlInitUnicodeString( &nameW
, readW
);
285 if (!NtQueryValueKey( hkey
, &nameW
, KeyValuePartialInformation
, tmp
, sizeof(tmp
), &dummy
))
287 WCHAR
*str
= (WCHAR
*)((KEY_VALUE_PARTIAL_INFORMATION
*)tmp
)->Data
;
288 do_IO_port_init_read_or_write(str
, IO_READ
);
290 RtlInitUnicodeString( &nameW
, writeW
);
291 if (!NtQueryValueKey( hkey
, &nameW
, KeyValuePartialInformation
, tmp
, sizeof(tmp
), &dummy
))
293 WCHAR
*str
= (WCHAR
*)((KEY_VALUE_PARTIAL_INFORMATION
*)tmp
)->Data
;
294 do_IO_port_init_read_or_write(str
, IO_WRITE
);
301 #endif /* DIRECT_IO_ACCESS */
304 /**********************************************************************
307 * Note: The size argument has to be handled correctly _externally_
308 * (as we always return a DWORD)
310 DWORD WINAPI
DOSVM_inport( int port
, int size
)
314 TRACE("%d-byte value from port 0x%04x\n", size
, port
);
317 if (do_pp_port_access
== -1) do_pp_port_access
=IO_pp_init();
318 if ((do_pp_port_access
== 0 ) && (size
== 1))
320 if (!IO_pp_inp(port
,&res
)) return res
;
324 #ifdef DIRECT_IO_ACCESS
325 if (do_direct_port_access
== -1) IO_port_init();
326 if ((do_direct_port_access
)
327 /* Make sure we have access to the port */
328 && (port_permissions
[port
] & IO_READ
))
333 case 1: res
= inb( port
); break;
334 case 2: res
= inw( port
); break;
335 case 4: res
= inl( port
); break;
348 BYTE chan
= port
& 3;
350 if (tmr_8253
[chan
].latched
)
351 tempval
= tmr_8253
[chan
].latch
;
354 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
355 if (chan
== 0) /* System timer counter divisor */
357 /* FIXME: DOSVM_GetTimer() returns quite rigid values */
358 tempval
= dummy_ctr
+ (WORD
)DOSVM_GetTimer();
362 /* FIXME: intelligent hardware timer emulation needed */
367 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
370 res
= 0; /* shouldn't happen? */
372 case 1: /* read lo byte */
374 tmr_8253
[chan
].latched
= FALSE
;
376 case 3: /* read lo byte, then hi byte */
377 tmr_8253
[chan
].byte_toggle
^= 1; /* toggle */
378 if (tmr_8253
[chan
].byte_toggle
)
383 /* else [fall through if read hi byte !] */
384 case 2: /* read hi byte */
385 res
= (BYTE
)(tempval
>> 8);
386 tmr_8253
[chan
].latched
= FALSE
;
392 res
= DOSVM_Int09ReadScan(NULL
);
395 res
= (DWORD
)parport_8255
[1];
398 res
= (DWORD
)parport_8255
[2];
401 res
= (DWORD
)cmosaddress
;
404 res
= (DWORD
)cmosimage
[cmosaddress
& 0x3f];
408 res
= ~0U; /* no joystick */
413 res
= (DWORD
)SB_ioport_in( port
);
449 FIXME("Trying to read more than one byte from VGA!\n");
450 res
= (DWORD
)VGA_ioport_in( port
);
486 res
= (DWORD
)DMA_ioport_in( port
);
489 WARN("Direct I/O read attempted from port %x\n", port
);
496 /**********************************************************************
497 * outport (WINEDOS.@)
499 void WINAPI
DOSVM_outport( int port
, int size
, DWORD value
)
501 TRACE("IO: 0x%lx (%d-byte value) to port 0x%04x\n", value
, size
, port
);
504 if (do_pp_port_access
== -1) do_pp_port_access
= IO_pp_init();
505 if ((do_pp_port_access
== 0) && (size
== 1))
507 if (!IO_pp_outp(port
,&value
)) return;
511 #ifdef DIRECT_IO_ACCESS
513 if (do_direct_port_access
== -1) IO_port_init();
514 if ((do_direct_port_access
)
515 /* Make sure we have access to the port */
516 && (port_permissions
[port
] & IO_WRITE
))
521 case 1: outb( LOBYTE(value
), port
); break;
522 case 2: outw( LOWORD(value
), port
); break;
523 case 4: outl( value
, port
); break;
533 DOSVM_PIC_ioport_out( port
, (BYTE
)value
);
539 BYTE chan
= port
& 3;
541 /* we need to get the oldval before any lo/hi byte change has been made */
542 if (((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
543 !tmr_8253
[chan
].byte_toggle
)
544 tmr_8253
[chan
].oldval
= tmr_8253
[chan
].countmax
;
545 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
548 break; /* shouldn't happen? */
549 case 1: /* write lo byte */
550 tmr_8253
[chan
].countmax
=
551 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
553 case 3: /* write lo byte, then hi byte */
554 tmr_8253
[chan
].byte_toggle
^= TRUE
; /* toggle */
555 if (tmr_8253
[chan
].byte_toggle
)
557 tmr_8253
[chan
].countmax
=
558 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
561 /* else [fall through if write hi byte !] */
562 case 2: /* write hi byte */
563 tmr_8253
[chan
].countmax
=
564 (tmr_8253
[chan
].countmax
& 0x00ff) | ((BYTE
)value
<< 8);
567 /* if programming is finished and value has changed
568 then update to new value */
569 if ((((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
570 !tmr_8253
[chan
].byte_toggle
) &&
571 (tmr_8253
[chan
].countmax
!= tmr_8253
[chan
].oldval
))
572 set_timer_maxval(chan
, tmr_8253
[chan
].countmax
);
577 BYTE chan
= ((BYTE
)value
& 0xc0) >> 6;
578 /* ctrl byte for specific timer channel */
581 FIXME("8254 timer readback not implemented yet\n");
584 switch (((BYTE
)value
& 0x30) >> 4)
586 case 0: /* latch timer */
587 tmr_8253
[chan
].latched
= TRUE
;
588 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
589 if (chan
== 0) /* System timer divisor */
590 tmr_8253
[chan
].latch
= dummy_ctr
+ (WORD
)DOSVM_GetTimer();
593 /* FIXME: intelligent hardware timer emulation needed */
594 tmr_8253
[chan
].latch
= dummy_ctr
;
597 case 3: /* write lo byte, then hi byte */
598 tmr_8253
[chan
].byte_toggle
= FALSE
; /* init */
600 case 1: /* write lo byte only */
601 case 2: /* write hi byte only */
602 tmr_8253
[chan
].ctrlbyte_ch
= (BYTE
)value
;
608 parport_8255
[1] = (BYTE
)value
;
609 if ((((BYTE
)parport_8255
[1] & 3) == 3) && (tmr_8253
[2].countmax
!= 1))
611 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253
[2].countmax
);
612 Beep(1193180 / tmr_8253
[2].countmax
, 20);
616 cmosaddress
= (BYTE
)value
& 0x7f;
619 cmosimage
[cmosaddress
& 0x3f] = (BYTE
)value
;
623 SB_ioport_out( port
, (BYTE
)value
);
657 VGA_ioport_out( port
, LOBYTE(value
) );
659 VGA_ioport_out( port
+1, HIBYTE(value
) );
661 VGA_ioport_out( port
+2, LOBYTE(HIWORD(value
)) );
662 VGA_ioport_out( port
+3, HIBYTE(HIWORD(value
)) );
712 DMA_ioport_out( port
, (BYTE
)value
);
715 WARN("Direct I/O write attempted to port %x\n", port
);