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
28 #include "debugtools.h"
30 DEFAULT_DEBUG_CHANNEL(int);
34 BOOL16 byte_toggle
; /* if TRUE, then hi byte has already been written */
40 {0xFFFF, FALSE
, 0, FALSE
, 0x06, 0},
41 {0x0012, FALSE
, 0, FALSE
, 0x44, 0},
42 {0x0001, FALSE
, 0, FALSE
, 0x86, 0},
45 static int dummy_ctr
= 0;
47 static BYTE parport_8255
[4] = {0x4f, 0x20, 0xff, 0xff};
49 static BYTE cmosaddress
;
51 static BYTE cmosimage
[64] =
53 0x27, 0x34, 0x31, 0x47, 0x16, 0x15, 0x00, 0x01,
54 0x04, 0x94, 0x26, 0x02, 0x50, 0x80, 0x00, 0x00,
55 0x40, 0xb1, 0x00, 0x9c, 0x01, 0x80, 0x02, 0x00,
56 0x1c, 0x00, 0x00, 0xad, 0x02, 0x10, 0x00, 0x00,
57 0x08, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x00,
58 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x03, 0x19,
59 0x00, 0x1c, 0x19, 0x81, 0x00, 0x0e, 0x00, 0x80,
60 0x1b, 0x7b, 0x21, 0x00, 0x00, 0x00, 0x05, 0x5f
63 #if defined(linux) && defined(__i386__)
64 # define DIRECT_IO_ACCESS
66 # undef DIRECT_IO_ACCESS
68 #endif /* linux && __i386__ */
70 #ifdef DIRECT_IO_ACCESS
72 extern int iopl(int level
);
73 static char do_direct_port_access
= -1;
75 static char do_pp_port_access
= -1; /* -1: uninitialized, 1: not available
78 static char port_permissions
[0x10000];
83 static void IO_FixCMOSCheckSum(void)
88 for (i
=0x10; i
< 0x2d; i
++)
90 cmosimage
[0x2e] = sum
>> 8; /* yes, this IS hi byte !! */
91 cmosimage
[0x2f] = sum
& 0xff;
92 TRACE("calculated hi %02x, lo %02x\n", cmosimage
[0x2e], cmosimage
[0x2f]);
95 #endif /* DIRECT_IO_ACCESS */
97 static void set_timer_maxval(unsigned timer
, unsigned maxval
)
100 case 0: /* System timer counter divisor */
101 Dosvm
.SetTimer(maxval
);
103 case 1: /* RAM refresh */
104 FIXME("RAM refresh counter handling not implemented !\n");
106 case 2: /* cassette & speaker */
108 if (((BYTE
)parport_8255
[1] & 3) == 3)
110 TRACE("Beep (freq: %d) !\n", 1193180 / maxval
);
111 Beep(1193180 / maxval
, 20);
117 /**********************************************************************
121 /* set_IO_permissions(int val1, int val)
122 * Helper function for IO_port_init
124 #ifdef DIRECT_IO_ACCESS
125 static void set_IO_permissions(int val1
, int val
, char rw
)
129 if (val
== -1) val
= 0x3ff;
130 for (j
= val1
; j
<= val
; j
++)
131 port_permissions
[j
] |= rw
;
133 do_direct_port_access
= 1;
136 } else if (val
!= -1) {
137 do_direct_port_access
= 1;
139 port_permissions
[val
] |= rw
;
144 /* do_IO_port_init_read_or_write(char* temp, char rw)
145 * Helper function for IO_port_init
148 static void do_IO_port_init_read_or_write(char* temp
, char rw
)
150 int val
, val1
, i
, len
;
151 if (!strcasecmp(temp
, "all")) {
152 MESSAGE("Warning!!! Granting FULL IO port access to"
153 " windoze programs!\nWarning!!! "
154 "*** THIS IS NOT AT ALL "
155 "RECOMMENDED!!! ***\n");
156 for (i
=0; i
< sizeof(port_permissions
); i
++)
157 port_permissions
[i
] |= rw
;
159 } else if (!(!strcmp(temp
, "*") || *temp
== '\0')) {
163 for (i
= 0; i
< len
; i
++) {
166 if (temp
[i
+1] == 'x' || temp
[i
+1] == 'X') {
167 sscanf(temp
+i
, "%x", &val
);
170 sscanf(temp
+i
, "%d", &val
);
172 while (isxdigit(temp
[i
]))
179 set_IO_permissions(val1
, val
, rw
);
184 if (val1
== -1) val1
= 0;
187 if (temp
[i
] >= '0' && temp
[i
] <= '9') {
188 sscanf(temp
+i
, "%d", &val
);
189 while (isdigit(temp
[i
]))
194 set_IO_permissions(val1
, val
, rw
);
198 static inline BYTE
inb( WORD port
)
201 __asm__
__volatile__( "inb %w1,%0" : "=a" (b
) : "d" (port
) );
205 static inline WORD
inw( WORD port
)
208 __asm__
__volatile__( "inw %w1,%0" : "=a" (w
) : "d" (port
) );
212 static inline DWORD
inl( WORD port
)
215 __asm__
__volatile__( "inl %w1,%0" : "=a" (dw
) : "d" (port
) );
219 static inline void outb( BYTE value
, WORD port
)
221 __asm__
__volatile__( "outb %b0,%w1" : : "a" (value
), "d" (port
) );
224 static inline void outw( WORD value
, WORD port
)
226 __asm__
__volatile__( "outw %w0,%w1" : : "a" (value
), "d" (port
) );
229 static inline void outl( DWORD value
, WORD port
)
231 __asm__
__volatile__( "outl %0,%w1" : : "a" (value
), "d" (port
) );
234 static void IO_port_init(void)
238 do_direct_port_access
= 0;
239 /* Can we do that? */
243 PROFILE_GetWineIniString( "ports", "read", "*",
244 temp
, sizeof(temp
) );
245 do_IO_port_init_read_or_write(temp
, IO_READ
);
246 PROFILE_GetWineIniString( "ports", "write", "*",
247 temp
, sizeof(temp
) );
248 do_IO_port_init_read_or_write(temp
, IO_WRITE
);
250 IO_FixCMOSCheckSum();
253 #endif /* DIRECT_IO_ACCESS */
255 /**********************************************************************
258 * Note: The size argument has to be handled correctly _externally_
259 * (as we always return a DWORD)
261 DWORD
IO_inport( int port
, int size
)
265 TRACE("%d-byte value from port 0x%02x\n", size
, port
);
268 if (do_pp_port_access
== -1)
269 do_pp_port_access
=IO_pp_init();
270 if ((do_pp_port_access
== 0 ) && (size
== 1))
271 if (!IO_pp_inp(port
,&res
))
274 #ifdef DIRECT_IO_ACCESS
275 if (do_direct_port_access
== -1) IO_port_init();
276 if ((do_direct_port_access
)
277 /* Make sure we have access to the port */
278 && (port_permissions
[port
] & IO_READ
))
283 case 1: res
= inb( port
); break;
284 case 2: res
= inw( port
); break;
285 case 4: res
= inl( port
); break;
287 ERR("invalid data size %d\n", size
);
300 BYTE chan
= port
& 3;
302 if (tmr_8253
[chan
].latched
)
303 tempval
= tmr_8253
[chan
].latch
;
306 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
307 if (chan
== 0) /* System timer counter divisor */
309 /* FIXME: Dosvm.GetTimer() returns quite rigid values */
310 tempval
= dummy_ctr
+ (WORD
)Dosvm
.GetTimer();
314 /* FIXME: intelligent hardware timer emulation needed */
319 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
322 res
= 0; /* shouldn't happen? */
324 case 1: /* read lo byte */
326 tmr_8253
[chan
].latched
= FALSE
;
328 case 3: /* read lo byte, then hi byte */
329 tmr_8253
[chan
].byte_toggle
^= TRUE
; /* toggle */
330 if (tmr_8253
[chan
].byte_toggle
)
335 /* else [fall through if read hi byte !] */
336 case 2: /* read hi byte */
337 res
= (BYTE
)(tempval
>> 8);
338 tmr_8253
[chan
].latched
= FALSE
;
344 res
= INT_Int09ReadScan(NULL
);
345 #if 0 /* what's this port got to do with parport ? */
346 res
= (DWORD
)parport_8255
[0];
350 res
= (DWORD
)parport_8255
[1];
353 res
= (DWORD
)parport_8255
[2];
356 res
= (DWORD
)cmosaddress
;
359 res
= (DWORD
)cmosimage
[cmosaddress
& 0x3f];
363 res
= 0xffffffff; /* no joystick */
367 res
= (DWORD
)VGA_ioport_in( port
);
370 WARN("Direct I/O read attempted from port %x\n", port
);
374 TRACE(" returning ( 0x%lx )\n", res
);
379 /**********************************************************************
382 void IO_outport( int port
, int size
, DWORD value
)
384 TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
388 if (do_pp_port_access
== -1)
389 do_pp_port_access
= IO_pp_init();
390 if ((do_pp_port_access
== 0) && (size
== 1))
391 if (!IO_pp_outp(port
,&value
))
394 #ifdef DIRECT_IO_ACCESS
396 if (do_direct_port_access
== -1) IO_port_init();
397 if ((do_direct_port_access
)
398 /* Make sure we have access to the port */
399 && (port_permissions
[port
] & IO_WRITE
))
404 case 1: outb( LOBYTE(value
), port
); break;
405 case 2: outw( LOWORD(value
), port
); break;
406 case 4: outl( value
, port
); break;
408 WARN("Invalid data size %d\n", size
);
418 Dosvm
.OutPIC( port
, (BYTE
)value
);
424 BYTE chan
= port
& 3;
426 /* we need to get the oldval before any lo/hi byte change has been made */
427 if (((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
428 !tmr_8253
[chan
].byte_toggle
)
429 tmr_8253
[chan
].oldval
= tmr_8253
[chan
].countmax
;
430 switch ((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) >> 4)
433 break; /* shouldn't happen? */
434 case 1: /* write lo byte */
435 tmr_8253
[chan
].countmax
=
436 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
438 case 3: /* write lo byte, then hi byte */
439 tmr_8253
[chan
].byte_toggle
^= TRUE
; /* toggle */
440 if (tmr_8253
[chan
].byte_toggle
)
442 tmr_8253
[chan
].countmax
=
443 (tmr_8253
[chan
].countmax
& 0xff00) | (BYTE
)value
;
446 /* else [fall through if write hi byte !] */
447 case 2: /* write hi byte */
448 tmr_8253
[chan
].countmax
=
449 (tmr_8253
[chan
].countmax
& 0x00ff) | ((BYTE
)value
<< 8);
452 /* if programming is finished and value has changed
453 then update to new value */
454 if ((((tmr_8253
[chan
].ctrlbyte_ch
& 0x30) != 0x30) ||
455 !tmr_8253
[chan
].byte_toggle
) &&
456 (tmr_8253
[chan
].countmax
!= tmr_8253
[chan
].oldval
))
457 set_timer_maxval(chan
, tmr_8253
[chan
].countmax
);
462 BYTE chan
= ((BYTE
)value
& 0xc0) >> 6;
463 /* ctrl byte for specific timer channel */
466 FIXME("8254 timer readback not implemented yet\n");
469 switch (((BYTE
)value
& 0x30) >> 4)
471 case 0: /* latch timer */
472 tmr_8253
[chan
].latched
= TRUE
;
473 dummy_ctr
-= 1 + (int)(10.0 * rand() / (RAND_MAX
+ 1.0));
474 if (chan
== 0) /* System timer divisor */
475 tmr_8253
[chan
].latch
= dummy_ctr
+ (WORD
)Dosvm
.GetTimer();
478 /* FIXME: intelligent hardware timer emulation needed */
479 tmr_8253
[chan
].latch
= dummy_ctr
;
482 case 3: /* write lo byte, then hi byte */
483 tmr_8253
[chan
].byte_toggle
= FALSE
; /* init */
485 case 1: /* write lo byte only */
486 case 2: /* write hi byte only */
487 tmr_8253
[chan
].ctrlbyte_ch
= (BYTE
)value
;
493 parport_8255
[1] = (BYTE
)value
;
494 if ((((BYTE
)parport_8255
[1] & 3) == 3) && (tmr_8253
[2].countmax
!= 1))
496 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253
[2].countmax
);
497 Beep(1193180 / tmr_8253
[2].countmax
, 20);
501 cmosaddress
= (BYTE
)value
& 0x7f;
504 cmosimage
[cmosaddress
& 0x3f] = (BYTE
)value
;
508 VGA_ioport_out( port
, (BYTE
)value
);
511 WARN("Direct I/O write attempted to port %x\n", port
);