2 * Emulation of processor ioports.
4 * Copyright 1995 Morten Welinder
5 * Copyright 1998 Andreas Mohr, Ove Kaaven
9 - only a few ports are emulated.
10 - real-time clock in "cmos" is bogus. A nifty alarm() setup could
26 #include "debugtools.h"
28 DEFAULT_DEBUG_CHANNEL(int);
32 BOOL16 byte_toggle
; /* if TRUE, then hi byte has already been written */
38 {0xFFFF, FALSE
, 0, FALSE
, 0x36, 0},
39 {0x0012, FALSE
, 0, FALSE
, 0x74, 0},
40 {0x0001, FALSE
, 0, FALSE
, 0xB6, 0},
43 static int dummy_ctr
= 0;
45 static BYTE parport_8255
[4] = {0x4f, 0x20, 0xff, 0xff};
47 static BYTE cmosaddress
;
49 static BYTE cmosimage
[64] =
51 0x27, 0x34, 0x31, 0x47, 0x16, 0x15, 0x00, 0x01,
52 0x04, 0x94, 0x26, 0x02, 0x50, 0x80, 0x00, 0x00,
53 0x40, 0xb1, 0x00, 0x9c, 0x01, 0x80, 0x02, 0x00,
54 0x1c, 0x00, 0x00, 0xad, 0x02, 0x10, 0x00, 0x00,
55 0x08, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x00,
56 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x03, 0x19,
57 0x00, 0x1c, 0x19, 0x81, 0x00, 0x0e, 0x00, 0x80,
58 0x1b, 0x7b, 0x21, 0x00, 0x00, 0x00, 0x05, 0x5f
61 #if defined(linux) && defined(__i386__)
62 # define DIRECT_IO_ACCESS
64 # undef DIRECT_IO_ACCESS
66 #endif /* linux && __i386__ */
68 #ifdef DIRECT_IO_ACCESS
70 extern int iopl(int level
);
71 static char do_direct_port_access
= -1;
73 static char do_pp_port_access
= -1; /* -1: uninitialized, 1: not available
76 static char port_permissions
[0x10000];
81 static void IO_FixCMOSCheckSum(void)
86 for (i
=0x10; i
< 0x2d; i
++)
88 cmosimage
[0x2e] = sum
>> 8; /* yes, this IS hi byte !! */
89 cmosimage
[0x2f] = sum
& 0xff;
90 TRACE("calculated hi %02x, lo %02x\n", cmosimage
[0x2e], cmosimage
[0x2f]);
93 #endif /* DIRECT_IO_ACCESS */
95 static void set_timer_maxval(unsigned timer
, unsigned maxval
)
98 case 0: /* System timer counter divisor */
99 if (Dosvm
.SetTimer
) Dosvm
.SetTimer(maxval
);
101 case 1: /* RAM refresh */
102 FIXME("RAM refresh counter handling not implemented !\n");
104 case 2: /* cassette & speaker */
106 if (((BYTE
)parport_8255
[1] & 3) == 3)
108 TRACE("Beep (freq: %d) !\n", 1193180 / maxval
);
109 Beep(1193180 / maxval
, 20);
115 /**********************************************************************
119 /* set_IO_permissions(int val1, int val)
120 * Helper function for IO_port_init
122 #ifdef DIRECT_IO_ACCESS
123 static void set_IO_permissions(int val1
, int val
, char rw
)
127 if (val
== -1) val
= 0x3ff;
128 for (j
= val1
; j
<= val
; j
++)
129 port_permissions
[j
] |= rw
;
131 do_direct_port_access
= 1;
134 } else if (val
!= -1) {
135 do_direct_port_access
= 1;
137 port_permissions
[val
] |= rw
;
142 /* do_IO_port_init_read_or_write(char* temp, char rw)
143 * Helper function for IO_port_init
146 static void do_IO_port_init_read_or_write(char* temp
, char rw
)
148 int val
, val1
, i
, len
;
149 if (!strcasecmp(temp
, "all")) {
150 MESSAGE("Warning!!! Granting FULL IO port access to"
151 " windoze programs!\nWarning!!! "
152 "*** THIS IS NOT AT ALL "
153 "RECOMMENDED!!! ***\n");
154 for (i
=0; i
< sizeof(port_permissions
); i
++)
155 port_permissions
[i
] |= rw
;
157 } else if (!(!strcmp(temp
, "*") || *temp
== '\0')) {
161 for (i
= 0; i
< len
; i
++) {
164 if (temp
[i
+1] == 'x' || temp
[i
+1] == 'X') {
165 sscanf(temp
+i
, "%x", &val
);
168 sscanf(temp
+i
, "%d", &val
);
170 while (isxdigit(temp
[i
]))
177 set_IO_permissions(val1
, val
, rw
);
182 if (val1
== -1) val1
= 0;
185 if (temp
[i
] >= '0' && temp
[i
] <= '9') {
186 sscanf(temp
+i
, "%d", &val
);
187 while (isdigit(temp
[i
]))
192 set_IO_permissions(val1
, val
, rw
);
196 static inline BYTE
inb( WORD port
)
199 __asm__
__volatile__( "inb %w1,%0" : "=a" (b
) : "d" (port
) );
203 static inline WORD
inw( WORD port
)
206 __asm__
__volatile__( "inw %w1,%0" : "=a" (w
) : "d" (port
) );
210 static inline DWORD
inl( WORD port
)
213 __asm__
__volatile__( "inl %w1,%0" : "=a" (dw
) : "d" (port
) );
217 static inline void outb( BYTE value
, WORD port
)
219 __asm__
__volatile__( "outb %b0,%w1" : : "a" (value
), "d" (port
) );
222 static inline void outw( WORD value
, WORD port
)
224 __asm__
__volatile__( "outw %w0,%w1" : : "a" (value
), "d" (port
) );
227 static inline void outl( DWORD value
, WORD port
)
229 __asm__
__volatile__( "outl %0,%w1" : : "a" (value
), "d" (port
) );
232 static void IO_port_init(void)
236 do_direct_port_access
= 0;
237 /* Can we do that? */
241 PROFILE_GetWineIniString( "ports", "read", "*",
242 temp
, sizeof(temp
) );
243 do_IO_port_init_read_or_write(temp
, IO_READ
);
244 PROFILE_GetWineIniString( "ports", "write", "*",
245 temp
, sizeof(temp
) );
246 do_IO_port_init_read_or_write(temp
, IO_WRITE
);
248 IO_FixCMOSCheckSum();
251 #endif /* DIRECT_IO_ACCESS */
253 /**********************************************************************
256 * Note: The size argument has to be handled correctly _externally_
257 * (as we always return a DWORD)
259 DWORD
IO_inport( int port
, int size
)
263 TRACE("%d-byte value from port 0x%02x\n", size
, port
);
266 if (do_pp_port_access
== -1)
267 do_pp_port_access
=IO_pp_init();
268 if ((do_pp_port_access
== 0 ) && (size
== 1))
269 if (!IO_pp_inp(port
,&res
))
272 #ifdef DIRECT_IO_ACCESS
273 if (do_direct_port_access
== -1) IO_port_init();
274 if ((do_direct_port_access
)
275 /* Make sure we have access to the port */
276 && (port_permissions
[port
] & IO_READ
))
281 case 1: res
= inb( port
); break;
282 case 2: res
= inw( port
); break;
283 case 4: res
= inl( port
); break;
285 ERR("invalid data size %d\n", size
);
292 /* first give the DOS VM a chance to handle it */
293 if (Dosvm
.inport
&& Dosvm
.inport( port
, size
, &res
)) return res
;
301 BYTE chan
= port
& 3;
303 if (tmr_8253
[chan
].latched
)
304 tempval
= tmr_8253
[chan
].latch
;
307 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
308 if (chan
== 0) /* System timer counter divisor */
310 /* FIXME: Dosvm.GetTimer() returns quite rigid values */
312 tempval
= dummy_ctr
+ (WORD
)Dosvm
.GetTimer();
318 /* FIXME: intelligent hardware timer emulation needed */
323 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
326 res
= 0; /* shouldn't happen? */
328 case 1: /* read lo byte */
330 tmr_8253
[chan
].latched
= FALSE
;
332 case 3: /* read lo byte, then hi byte */
333 tmr_8253
[chan
].byte_toggle
^= TRUE
; /* toggle */
334 if (tmr_8253
[chan
].byte_toggle
)
339 /* else [fall through if read hi byte !] */
340 case 2: /* read hi byte */
341 res
= (BYTE
)(tempval
>> 8);
342 tmr_8253
[chan
].latched
= FALSE
;
348 #if 0 /* what's this port got to do with parport ? */
349 res
= (DWORD
)parport_8255
[0];
353 res
= (DWORD
)parport_8255
[1];
356 res
= (DWORD
)parport_8255
[2];
359 res
= (DWORD
)cmosaddress
;
362 res
= (DWORD
)cmosimage
[cmosaddress
& 0x3f];
366 res
= 0xffffffff; /* no joystick */
369 WARN("Direct I/O read attempted from port %x\n", port
);
373 TRACE(" returning ( 0x%lx )\n", res
);
378 /**********************************************************************
381 void IO_outport( int port
, int size
, DWORD value
)
383 TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
387 if (do_pp_port_access
== -1)
388 do_pp_port_access
= IO_pp_init();
389 if ((do_pp_port_access
== 0) && (size
== 1))
390 if (!IO_pp_outp(port
,&value
))
393 #ifdef DIRECT_IO_ACCESS
395 if (do_direct_port_access
== -1) IO_port_init();
396 if ((do_direct_port_access
)
397 /* Make sure we have access to the port */
398 && (port_permissions
[port
] & IO_WRITE
))
403 case 1: outb( LOBYTE(value
), port
); break;
404 case 2: outw( LOWORD(value
), port
); break;
405 case 4: outl( value
, port
); break;
407 WARN("Invalid data size %d\n", size
);
414 /* first give the DOS VM a chance to handle it */
415 if (Dosvm
.outport
&& Dosvm
.outport( port
, size
, value
)) return;
423 BYTE chan
= port
& 3;
425 /* we need to get the oldval before any lo/hi byte change has been made */
426 if (((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
427 !tmr_8253
[chan
].byte_toggle
)
428 tmr_8253
[chan
].oldval
= tmr_8253
[chan
].countmax
;
429 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
432 break; /* shouldn't happen? */
433 case 1: /* write lo byte */
434 tmr_8253
[chan
].countmax
=
435 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
437 case 3: /* write lo byte, then hi byte */
438 tmr_8253
[chan
].byte_toggle
^= TRUE
; /* toggle */
439 if (tmr_8253
[chan
].byte_toggle
)
441 tmr_8253
[chan
].countmax
=
442 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
445 /* else [fall through if write hi byte !] */
446 case 2: /* write hi byte */
447 tmr_8253
[chan
].countmax
=
448 (tmr_8253
[chan
].countmax
& 0x00ff) | ((BYTE
)value
<< 8);
451 /* if programming is finished and value has changed
452 then update to new value */
453 if ((((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
454 !tmr_8253
[chan
].byte_toggle
) &&
455 (tmr_8253
[chan
].countmax
!= tmr_8253
[chan
].oldval
))
456 set_timer_maxval(chan
, tmr_8253
[chan
].countmax
);
461 BYTE chan
= ((BYTE
)value
& 0xc0) >> 6;
462 /* ctrl byte for specific timer channel */
465 FIXME("8254 timer readback not implemented yet\n");
468 switch (((BYTE
)value
& 0x30) >> 4)
470 case 0: /* latch timer */
471 tmr_8253
[chan
].latched
= TRUE
;
472 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
473 if (chan
== 0) /* System timer divisor */
475 tmr_8253
[chan
].latch
= dummy_ctr
+ (WORD
)Dosvm
.GetTimer();
477 tmr_8253
[chan
].latch
= dummy_ctr
;
480 /* FIXME: intelligent hardware timer emulation needed */
481 tmr_8253
[chan
].latch
= dummy_ctr
;
484 case 3: /* write lo byte, then hi byte */
485 tmr_8253
[chan
].byte_toggle
= FALSE
; /* init */
487 case 1: /* write lo byte only */
488 case 2: /* write hi byte only */
489 tmr_8253
[chan
].ctrlbyte_ch
= (BYTE
)value
;
495 parport_8255
[1] = (BYTE
)value
;
496 if ((((BYTE
)parport_8255
[1] & 3) == 3) && (tmr_8253
[2].countmax
!= 1))
498 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253
[2].countmax
);
499 Beep(1193180 / tmr_8253
[2].countmax
, 20);
503 cmosaddress
= (BYTE
)value
& 0x7f;
506 cmosimage
[cmosaddress
& 0x3f] = (BYTE
)value
;
509 WARN("Direct I/O write attempted to port %x\n", port
);