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 */
102 Dosvm.SetTimer(maxval);
104 case 1: /* RAM refresh */
105 FIXME("RAM refresh counter handling not implemented !\n");
107 case 2: /* cassette & speaker */
109 if (((BYTE)parport_8255[1] & 3) == 3)
111 TRACE("Beep (freq: %d) !\n", 1193180 / maxval );
112 Beep(1193180 / maxval, 20);
118 /**********************************************************************
122 /* set_IO_permissions(int val1, int val)
123 * Helper function for IO_port_init
125 #ifdef DIRECT_IO_ACCESS
126 static void set_IO_permissions(int val1, int val, char rw)
130 if (val == -1) val = 0x3ff;
131 for (j = val1; j <= val; j++)
132 port_permissions[j] |= rw;
134 do_direct_port_access = 1;
137 } else if (val != -1) {
138 do_direct_port_access = 1;
140 port_permissions[val] |= rw;
145 /* do_IO_port_init_read_or_write(char* temp, char rw)
146 * Helper function for IO_port_init
149 static void do_IO_port_init_read_or_write(char* temp, char rw)
151 int val, val1, i, len;
152 if (!strcasecmp(temp, "all")) {
153 MESSAGE("Warning!!! Granting FULL IO port access to"
154 " windoze programs!\nWarning!!! "
155 "*** THIS IS NOT AT ALL "
156 "RECOMMENDED!!! ***\n");
157 for (i=0; i < sizeof(port_permissions); i++)
158 port_permissions[i] |= rw;
160 } else if (!(!strcmp(temp, "*") || *temp == '\0')) {
164 for (i = 0; i < len; i++) {
167 if (temp[i+1] == 'x' || temp[i+1] == 'X') {
168 sscanf(temp+i, "%x", &val);
171 sscanf(temp+i, "%d", &val);
173 while (isxdigit(temp[i]))
180 set_IO_permissions(val1, val, rw);
185 if (val1 == -1) val1 = 0;
188 if (temp[i] >= '0' && temp[i] <= '9') {
189 sscanf(temp+i, "%d", &val);
190 while (isdigit(temp[i]))
195 set_IO_permissions(val1, val, rw);
199 static inline BYTE inb( WORD port )
202 __asm__ __volatile__( "inb %w1,%0" : "=a" (b) : "d" (port) );
206 static inline WORD inw( WORD port )
209 __asm__ __volatile__( "inw %w1,%0" : "=a" (w) : "d" (port) );
213 static inline DWORD inl( WORD port )
216 __asm__ __volatile__( "inl %w1,%0" : "=a" (dw) : "d" (port) );
220 static inline void outb( BYTE value, WORD port )
222 __asm__ __volatile__( "outb %b0,%w1" : : "a" (value), "d" (port) );
225 static inline void outw( WORD value, WORD port )
227 __asm__ __volatile__( "outw %w0,%w1" : : "a" (value), "d" (port) );
230 static inline void outl( DWORD value, WORD port )
232 __asm__ __volatile__( "outl %0,%w1" : : "a" (value), "d" (port) );
235 static void IO_port_init(void)
239 do_direct_port_access = 0;
240 /* Can we do that? */
244 PROFILE_GetWineIniString( "ports", "read", "*",
245 temp, sizeof(temp) );
246 do_IO_port_init_read_or_write(temp, IO_READ);
247 PROFILE_GetWineIniString( "ports", "write", "*",
248 temp, sizeof(temp) );
249 do_IO_port_init_read_or_write(temp, IO_WRITE);
251 IO_FixCMOSCheckSum();
254 #endif /* DIRECT_IO_ACCESS */
256 /**********************************************************************
259 * Note: The size argument has to be handled correctly _externally_
260 * (as we always return a DWORD)
262 DWORD IO_inport( int port, int size )
266 TRACE("%d-byte value from port 0x%02x\n", size, port );
269 if (do_pp_port_access == -1)
270 do_pp_port_access =IO_pp_init();
271 if ((do_pp_port_access == 0 ) && (size == 1))
272 if (!IO_pp_inp(port,&res))
275 #ifdef DIRECT_IO_ACCESS
276 if (do_direct_port_access == -1) IO_port_init();
277 if ((do_direct_port_access)
278 /* Make sure we have access to the port */
279 && (port_permissions[port] & IO_READ))
284 case 1: res = inb( port ); break;
285 case 2: res = inw( port ); break;
286 case 4: res = inl( port ); break;
288 ERR("invalid data size %d\n", size);
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 res = INT_Int09ReadScan(NULL);
349 #if 0 /* what's this port got to do with parport ? */
350 res = (DWORD)parport_8255[0];
354 res = (DWORD)parport_8255[1];
357 res = (DWORD)parport_8255[2];
360 res = (DWORD)cmosaddress;
363 res = (DWORD)cmosimage[cmosaddress & 0x3f];
367 res = 0xffffffff; /* no joystick */
371 res = (DWORD)VGA_ioport_in( port );
374 WARN("Direct I/O read attempted from port %x\n", port);
378 TRACE(" returning ( 0x%lx )\n", res );
383 /**********************************************************************
386 void IO_outport( int port, int size, DWORD value )
388 TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
392 if (do_pp_port_access == -1)
393 do_pp_port_access = IO_pp_init();
394 if ((do_pp_port_access == 0) && (size == 1))
395 if (!IO_pp_outp(port,&value))
398 #ifdef DIRECT_IO_ACCESS
400 if (do_direct_port_access == -1) IO_port_init();
401 if ((do_direct_port_access)
402 /* Make sure we have access to the port */
403 && (port_permissions[port] & IO_WRITE))
408 case 1: outb( LOBYTE(value), port ); break;
409 case 2: outw( LOWORD(value), port ); break;
410 case 4: outl( value, port ); break;
412 WARN("Invalid data size %d\n", size);
423 Dosvm.OutPIC( port, (BYTE)value );
429 BYTE chan = port & 3;
431 /* we need to get the oldval before any lo/hi byte change has been made */
432 if (((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
433 !tmr_8253[chan].byte_toggle)
434 tmr_8253[chan].oldval = tmr_8253[chan].countmax;
435 switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
438 break; /* shouldn't happen? */
439 case 1: /* write lo byte */
440 tmr_8253[chan].countmax =
441 (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
443 case 3: /* write lo byte, then hi byte */
444 tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
445 if (tmr_8253[chan].byte_toggle)
447 tmr_8253[chan].countmax =
448 (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
451 /* else [fall through if write hi byte !] */
452 case 2: /* write hi byte */
453 tmr_8253[chan].countmax =
454 (tmr_8253[chan].countmax & 0x00ff) | ((BYTE)value << 8);
457 /* if programming is finished and value has changed
458 then update to new value */
459 if ((((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
460 !tmr_8253[chan].byte_toggle) &&
461 (tmr_8253[chan].countmax != tmr_8253[chan].oldval))
462 set_timer_maxval(chan, tmr_8253[chan].countmax);
467 BYTE chan = ((BYTE)value & 0xc0) >> 6;
468 /* ctrl byte for specific timer channel */
471 FIXME("8254 timer readback not implemented yet\n");
474 switch (((BYTE)value & 0x30) >> 4)
476 case 0: /* latch timer */
477 tmr_8253[chan].latched = TRUE;
478 dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
479 if (chan == 0) /* System timer divisor */
481 tmr_8253[chan].latch = dummy_ctr + (WORD)Dosvm.GetTimer();
483 tmr_8253[chan].latch = dummy_ctr;
486 /* FIXME: intelligent hardware timer emulation needed */
487 tmr_8253[chan].latch = dummy_ctr;
490 case 3: /* write lo byte, then hi byte */
491 tmr_8253[chan].byte_toggle = FALSE; /* init */
493 case 1: /* write lo byte only */
494 case 2: /* write hi byte only */
495 tmr_8253[chan].ctrlbyte_ch = (BYTE)value;
501 parport_8255[1] = (BYTE)value;
502 if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253[2].countmax != 1))
504 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253[2].countmax);
505 Beep(1193180 / tmr_8253[2].countmax, 20);
509 cmosaddress = (BYTE)value & 0x7f;
512 cmosimage[cmosaddress & 0x3f] = (BYTE)value;
516 VGA_ioport_out( port, (BYTE)value );
519 WARN("Direct I/O write attempted to port %x\n", port );