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
29 #include "wine/port.h"
44 #include "wine/debug.h"
46 WINE_DEFAULT_DEBUG_CHANNEL(int);
50 BOOL16 byte_toggle; /* if TRUE, then hi byte has already been written */
56 {0xFFFF, FALSE, 0, FALSE, 0x36, 0},
57 {0x0012, FALSE, 0, FALSE, 0x74, 0},
58 {0x0001, FALSE, 0, FALSE, 0xB6, 0},
61 static int dummy_ctr = 0;
63 static BYTE parport_8255[4] = {0x4f, 0x20, 0xff, 0xff};
65 static BYTE cmosaddress;
67 static BYTE cmosimage[64] =
69 0x27, 0x34, 0x31, 0x47, 0x16, 0x15, 0x00, 0x01,
70 0x04, 0x94, 0x26, 0x02, 0x50, 0x80, 0x00, 0x00,
71 0x40, 0xb1, 0x00, 0x9c, 0x01, 0x80, 0x02, 0x00,
72 0x1c, 0x00, 0x00, 0xad, 0x02, 0x10, 0x00, 0x00,
73 0x08, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x00,
74 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x03, 0x19,
75 0x00, 0x1c, 0x19, 0x81, 0x00, 0x0e, 0x00, 0x80,
76 0x1b, 0x7b, 0x21, 0x00, 0x00, 0x00, 0x05, 0x5f
79 #if defined(linux) && defined(__i386__)
80 # define DIRECT_IO_ACCESS
82 # undef DIRECT_IO_ACCESS
84 #endif /* linux && __i386__ */
87 static int do_pp_port_access = -1; /* -1: uninitialized, 1: not available
91 #ifdef DIRECT_IO_ACCESS
93 extern int iopl(int level);
94 static char do_direct_port_access = -1;
95 static char port_permissions[0x10000];
100 static void IO_FixCMOSCheckSum(void)
105 for (i=0x10; i < 0x2d; i++)
107 cmosimage[0x2e] = sum >> 8; /* yes, this IS hi byte !! */
108 cmosimage[0x2f] = sum & 0xff;
109 TRACE("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
112 #endif /* DIRECT_IO_ACCESS */
114 static void set_timer_maxval(unsigned timer, unsigned maxval)
117 case 0: /* System timer counter divisor */
118 if (Dosvm.SetTimer) Dosvm.SetTimer(maxval);
120 case 1: /* RAM refresh */
121 FIXME("RAM refresh counter handling not implemented !\n");
123 case 2: /* cassette & speaker */
125 if (((BYTE)parport_8255[1] & 3) == 3)
127 TRACE("Beep (freq: %d) !\n", 1193180 / maxval );
128 Beep(1193180 / maxval, 20);
134 /**********************************************************************
138 /* set_IO_permissions(int val1, int val)
139 * Helper function for IO_port_init
141 #ifdef DIRECT_IO_ACCESS
142 static void set_IO_permissions(int val1, int val, char rw)
146 if (val == -1) val = 0x3ff;
147 for (j = val1; j <= val; j++)
148 port_permissions[j] |= rw;
150 do_direct_port_access = 1;
153 } else if (val != -1) {
154 do_direct_port_access = 1;
156 port_permissions[val] |= rw;
161 /* do_IO_port_init_read_or_write(char* temp, char rw)
162 * Helper function for IO_port_init
165 static void do_IO_port_init_read_or_write(char* temp, char rw)
167 int val, val1, i, len;
168 if (!strcasecmp(temp, "all")) {
169 MESSAGE("Warning!!! Granting FULL IO port access to"
170 " windoze programs!\nWarning!!! "
171 "*** THIS IS NOT AT ALL "
172 "RECOMMENDED!!! ***\n");
173 for (i=0; i < sizeof(port_permissions); i++)
174 port_permissions[i] |= rw;
176 } else if (!(!strcmp(temp, "*") || *temp == '\0')) {
180 for (i = 0; i < len; i++) {
183 if (temp[i+1] == 'x' || temp[i+1] == 'X') {
184 sscanf(temp+i, "%x", &val);
187 sscanf(temp+i, "%d", &val);
189 while (isxdigit(temp[i]))
196 set_IO_permissions(val1, val, rw);
201 if (val1 == -1) val1 = 0;
204 if (temp[i] >= '0' && temp[i] <= '9') {
205 sscanf(temp+i, "%d", &val);
206 while (isdigit(temp[i]))
211 set_IO_permissions(val1, val, rw);
215 static inline BYTE inb( WORD port )
218 __asm__ __volatile__( "inb %w1,%0" : "=a" (b) : "d" (port) );
222 static inline WORD inw( WORD port )
225 __asm__ __volatile__( "inw %w1,%0" : "=a" (w) : "d" (port) );
229 static inline DWORD inl( WORD port )
232 __asm__ __volatile__( "inl %w1,%0" : "=a" (dw) : "d" (port) );
236 static inline void outb( BYTE value, WORD port )
238 __asm__ __volatile__( "outb %b0,%w1" : : "a" (value), "d" (port) );
241 static inline void outw( WORD value, WORD port )
243 __asm__ __volatile__( "outw %w0,%w1" : : "a" (value), "d" (port) );
246 static inline void outl( DWORD value, WORD port )
248 __asm__ __volatile__( "outl %0,%w1" : : "a" (value), "d" (port) );
251 static void IO_port_init(void)
255 static const WCHAR portsW[] = {'p','o','r','t','s',0};
256 static const WCHAR readW[] = {'r','e','a','d',0};
257 static const WCHAR writeW[] = {'w','r','i','t','e',0};
258 static const WCHAR asteriskW[] = {'*',0};
260 do_direct_port_access = 0;
261 /* Can we do that? */
265 PROFILE_GetWineIniString( portsW, readW, asteriskW, tempW, 1024 );
266 WideCharToMultiByte(CP_ACP, 0, tempW, -1, temp, 1024, NULL, NULL);
267 do_IO_port_init_read_or_write(temp, IO_READ);
268 PROFILE_GetWineIniString( portsW, writeW, asteriskW, tempW, 1024 );
269 WideCharToMultiByte(CP_ACP, 0, tempW, -1, temp, 1024, NULL, NULL);
270 do_IO_port_init_read_or_write(temp, IO_WRITE);
272 IO_FixCMOSCheckSum();
275 #endif /* DIRECT_IO_ACCESS */
277 /**********************************************************************
280 * Note: The size argument has to be handled correctly _externally_
281 * (as we always return a DWORD)
283 DWORD IO_inport( int port, int size )
287 TRACE("%d-byte value from port 0x%02x\n", size, port );
290 if (do_pp_port_access == -1)
291 do_pp_port_access =IO_pp_init();
292 if ((do_pp_port_access == 0 ) && (size == 1))
293 if (!IO_pp_inp(port,&res))
296 #ifdef DIRECT_IO_ACCESS
297 if (do_direct_port_access == -1) IO_port_init();
298 if ((do_direct_port_access)
299 /* Make sure we have access to the port */
300 && (port_permissions[port] & IO_READ))
305 case 1: res = inb( port ); break;
306 case 2: res = inw( port ); break;
307 case 4: res = inl( port ); break;
309 ERR("invalid data size %d\n", size);
316 /* first give the DOS VM a chance to handle it */
317 if (Dosvm.inport && Dosvm.inport( port, size, &res )) return res;
325 BYTE chan = port & 3;
327 if (tmr_8253[chan].latched)
328 tempval = tmr_8253[chan].latch;
331 dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
332 if (chan == 0) /* System timer counter divisor */
334 /* FIXME: Dosvm.GetTimer() returns quite rigid values */
336 tempval = dummy_ctr + (WORD)Dosvm.GetTimer();
342 /* FIXME: intelligent hardware timer emulation needed */
347 switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
350 res = 0; /* shouldn't happen? */
352 case 1: /* read lo byte */
354 tmr_8253[chan].latched = FALSE;
356 case 3: /* read lo byte, then hi byte */
357 tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
358 if (tmr_8253[chan].byte_toggle)
363 /* else [fall through if read hi byte !] */
364 case 2: /* read hi byte */
365 res = (BYTE)(tempval >> 8);
366 tmr_8253[chan].latched = FALSE;
372 #if 0 /* what's this port got to do with parport ? */
373 res = (DWORD)parport_8255[0];
377 res = (DWORD)parport_8255[1];
380 res = (DWORD)parport_8255[2];
383 res = (DWORD)cmosaddress;
386 res = (DWORD)cmosimage[cmosaddress & 0x3f];
390 res = 0xffffffff; /* no joystick */
393 WARN("Direct I/O read attempted from port %x\n", port);
397 TRACE(" returning ( 0x%lx )\n", res );
402 /**********************************************************************
405 void IO_outport( int port, int size, DWORD value )
407 TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
411 if (do_pp_port_access == -1)
412 do_pp_port_access = IO_pp_init();
413 if ((do_pp_port_access == 0) && (size == 1))
414 if (!IO_pp_outp(port,&value))
417 #ifdef DIRECT_IO_ACCESS
419 if (do_direct_port_access == -1) IO_port_init();
420 if ((do_direct_port_access)
421 /* Make sure we have access to the port */
422 && (port_permissions[port] & IO_WRITE))
427 case 1: outb( LOBYTE(value), port ); break;
428 case 2: outw( LOWORD(value), port ); break;
429 case 4: outl( value, port ); break;
431 WARN("Invalid data size %d\n", size);
438 /* first give the DOS VM a chance to handle it */
439 if (Dosvm.outport && Dosvm.outport( port, size, value )) return;
447 BYTE chan = port & 3;
449 /* we need to get the oldval before any lo/hi byte change has been made */
450 if (((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
451 !tmr_8253[chan].byte_toggle)
452 tmr_8253[chan].oldval = tmr_8253[chan].countmax;
453 switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
456 break; /* shouldn't happen? */
457 case 1: /* write lo byte */
458 tmr_8253[chan].countmax =
459 (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
461 case 3: /* write lo byte, then hi byte */
462 tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
463 if (tmr_8253[chan].byte_toggle)
465 tmr_8253[chan].countmax =
466 (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
469 /* else [fall through if write hi byte !] */
470 case 2: /* write hi byte */
471 tmr_8253[chan].countmax =
472 (tmr_8253[chan].countmax & 0x00ff) | ((BYTE)value << 8);
475 /* if programming is finished and value has changed
476 then update to new value */
477 if ((((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
478 !tmr_8253[chan].byte_toggle) &&
479 (tmr_8253[chan].countmax != tmr_8253[chan].oldval))
480 set_timer_maxval(chan, tmr_8253[chan].countmax);
485 BYTE chan = ((BYTE)value & 0xc0) >> 6;
486 /* ctrl byte for specific timer channel */
489 FIXME("8254 timer readback not implemented yet\n");
492 switch (((BYTE)value & 0x30) >> 4)
494 case 0: /* latch timer */
495 tmr_8253[chan].latched = TRUE;
496 dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
497 if (chan == 0) /* System timer divisor */
499 tmr_8253[chan].latch = dummy_ctr + (WORD)Dosvm.GetTimer();
501 tmr_8253[chan].latch = dummy_ctr;
504 /* FIXME: intelligent hardware timer emulation needed */
505 tmr_8253[chan].latch = dummy_ctr;
508 case 3: /* write lo byte, then hi byte */
509 tmr_8253[chan].byte_toggle = FALSE; /* init */
511 case 1: /* write lo byte only */
512 case 2: /* write hi byte only */
513 tmr_8253[chan].ctrlbyte_ch = (BYTE)value;
519 parport_8255[1] = (BYTE)value;
520 if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253[2].countmax != 1))
522 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253[2].countmax);
523 Beep(1193180 / tmr_8253[2].countmax, 20);
527 cmosaddress = (BYTE)value & 0x7f;
530 cmosimage[cmosaddress & 0x3f] = (BYTE)value;
533 WARN("Direct I/O write attempted to port %x\n", port );