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, 0x06, 0},
39 {0x0012, FALSE, 0, FALSE, 0x44, 0},
40 {0x0001, FALSE, 0, FALSE, 0x86, 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
65 #endif /* linux && __i386__ */
67 #ifdef DIRECT_IO_ACCESS
69 extern int iopl(int level);
71 static char do_direct_port_access = -1;
72 static char port_permissions[0x10000];
77 static void IO_FixCMOSCheckSum(void)
82 for (i=0x10; i < 0x2d; i++)
84 cmosimage[0x2e] = sum >> 8; /* yes, this IS hi byte !! */
85 cmosimage[0x2f] = sum & 0xff;
86 TRACE("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
89 #endif /* DIRECT_IO_ACCESS */
91 static void set_timer_maxval(unsigned timer, unsigned maxval)
94 case 0: /* System timer counter divisor */
95 Dosvm.SetTimer(maxval);
97 case 1: /* RAM refresh */
98 FIXME("RAM refresh counter handling not implemented !");
100 case 2: /* cassette & speaker */
102 if (((BYTE)parport_8255[1] & 3) == 3)
104 TRACE("Beep (freq: %d) !\n", 1193180 / maxval );
105 Beep(1193180 / maxval, 20);
111 /**********************************************************************
115 /* set_IO_permissions(int val1, int val)
116 * Helper function for IO_port_init
118 #ifdef DIRECT_IO_ACCESS
119 static void set_IO_permissions(int val1, int val, char rw)
123 if (val == -1) val = 0x3ff;
124 for (j = val1; j <= val; j++)
125 port_permissions[j] |= rw;
127 do_direct_port_access = 1;
130 } else if (val != -1) {
131 do_direct_port_access = 1;
133 port_permissions[val] |= rw;
138 /* do_IO_port_init_read_or_write(char* temp, char rw)
139 * Helper function for IO_port_init
142 static void do_IO_port_init_read_or_write(char* temp, char rw)
144 int val, val1, i, len;
145 if (!strcasecmp(temp, "all")) {
146 MESSAGE("Warning!!! Granting FULL IO port access to"
147 " windoze programs!\nWarning!!! "
148 "*** THIS IS NOT AT ALL "
149 "RECOMMENDED!!! ***\n");
150 for (i=0; i < sizeof(port_permissions); i++)
151 port_permissions[i] |= rw;
153 } else if (!(!strcmp(temp, "*") || *temp == '\0')) {
157 for (i = 0; i < len; i++) {
160 if (temp[i+1] == 'x' || temp[i+1] == 'X') {
161 sscanf(temp+i, "%x", &val);
164 sscanf(temp+i, "%d", &val);
166 while (isxdigit(temp[i]))
173 set_IO_permissions(val1, val, rw);
178 if (val1 == -1) val1 = 0;
181 if (temp[i] >= '0' && temp[i] <= '9') {
182 sscanf(temp+i, "%d", &val);
183 while (isdigit(temp[i]))
188 set_IO_permissions(val1, val, rw);
192 static inline BYTE inb( WORD port )
195 __asm__ __volatile__( "inb %w1,%0" : "=a" (b) : "d" (port) );
199 static inline WORD inw( WORD port )
202 __asm__ __volatile__( "inw %w1,%0" : "=a" (w) : "d" (port) );
206 static inline DWORD inl( WORD port )
209 __asm__ __volatile__( "inl %w1,%0" : "=a" (dw) : "d" (port) );
213 static inline void outb( BYTE value, WORD port )
215 __asm__ __volatile__( "outb %b0,%w1" : : "a" (value), "d" (port) );
218 static inline void outw( WORD value, WORD port )
220 __asm__ __volatile__( "outw %w0,%w1" : : "a" (value), "d" (port) );
223 static inline void outl( DWORD value, WORD port )
225 __asm__ __volatile__( "outl %0,%w1" : : "a" (value), "d" (port) );
228 static void IO_port_init(void)
232 do_direct_port_access = 0;
233 /* Can we do that? */
237 PROFILE_GetWineIniString( "ports", "read", "*",
238 temp, sizeof(temp) );
239 do_IO_port_init_read_or_write(temp, IO_READ);
240 PROFILE_GetWineIniString( "ports", "write", "*",
241 temp, sizeof(temp) );
242 do_IO_port_init_read_or_write(temp, IO_WRITE);
244 IO_FixCMOSCheckSum();
247 #endif /* DIRECT_IO_ACCESS */
249 /**********************************************************************
252 * Note: The size argument has to be handled correctly _externally_
253 * (as we always return a DWORD)
255 DWORD IO_inport( int port, int size )
259 TRACE("%d-byte value from port 0x%02x\n", size, port );
261 #ifdef DIRECT_IO_ACCESS
262 if (do_direct_port_access == -1) IO_port_init();
263 if ((do_direct_port_access)
264 /* Make sure we have access to the port */
265 && (port_permissions[port] & IO_READ))
270 case 1: res = inb( port ); break;
271 case 2: res = inw( port ); break;
272 case 4: res = inl( port ); break;
274 ERR("invalid data size %d\n", size);
287 BYTE chan = port & 3;
289 if (tmr_8253[chan].latched)
290 tempval = tmr_8253[chan].latch;
293 dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
294 if (chan == 0) /* System timer counter divisor */
296 /* FIXME: Dosvm.GetTimer() returns quite rigid values */
297 tempval = dummy_ctr + (WORD)Dosvm.GetTimer();
301 /* FIXME: intelligent hardware timer emulation needed */
306 switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
309 res = 0; /* shouldn't happen? */
311 case 1: /* read lo byte */
313 tmr_8253[chan].latched = FALSE;
315 case 3: /* read lo byte, then hi byte */
316 tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
317 if (tmr_8253[chan].byte_toggle)
322 /* else [fall through if read hi byte !] */
323 case 2: /* read hi byte */
324 res = (BYTE)(tempval >> 8);
325 tmr_8253[chan].latched = FALSE;
331 res = INT_Int09ReadScan(NULL);
332 #if 0 /* what's this port got to do with parport ? */
333 res = (DWORD)parport_8255[0];
337 res = (DWORD)parport_8255[1];
340 res = (DWORD)parport_8255[2];
343 res = (DWORD)cmosaddress;
346 res = (DWORD)cmosimage[cmosaddress & 0x3f];
350 res = 0xffffffff; /* no joystick */
354 res = (DWORD)VGA_ioport_in( port );
357 WARN("Direct I/O read attempted from port %x\n", port);
361 TRACE(" returning ( 0x%lx )\n", res );
366 /**********************************************************************
369 void IO_outport( int port, int size, DWORD value )
371 TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
374 #ifdef DIRECT_IO_ACCESS
375 if (do_direct_port_access == -1) IO_port_init();
376 if ((do_direct_port_access)
377 /* Make sure we have access to the port */
378 && (port_permissions[port] & IO_WRITE))
383 case 1: outb( LOBYTE(value), port ); break;
384 case 2: outw( LOWORD(value), port ); break;
385 case 4: outl( value, port ); break;
387 WARN("Invalid data size %d\n", size);
397 Dosvm.OutPIC( port, (BYTE)value );
403 BYTE chan = port & 3;
405 /* we need to get the oldval before any lo/hi byte change has been made */
406 if (((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
407 !tmr_8253[chan].byte_toggle)
408 tmr_8253[chan].oldval = tmr_8253[chan].countmax;
409 switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
412 break; /* shouldn't happen? */
413 case 1: /* write lo byte */
414 tmr_8253[chan].countmax =
415 (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
417 case 3: /* write lo byte, then hi byte */
418 tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
419 if (tmr_8253[chan].byte_toggle)
421 tmr_8253[chan].countmax =
422 (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
425 /* else [fall through if write hi byte !] */
426 case 2: /* write hi byte */
427 tmr_8253[chan].countmax =
428 (tmr_8253[chan].countmax & 0x00ff) | ((BYTE)value << 8);
431 /* if programming is finished and value has changed
432 then update to new value */
433 if ((((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
434 !tmr_8253[chan].byte_toggle) &&
435 (tmr_8253[chan].countmax != tmr_8253[chan].oldval))
436 set_timer_maxval(chan, tmr_8253[chan].countmax);
441 BYTE chan = ((BYTE)value & 0xc0) >> 6;
442 /* ctrl byte for specific timer channel */
445 FIXME("8254 timer readback not implemented yet\n");
448 switch (((BYTE)value & 0x30) >> 4)
450 case 0: /* latch timer */
451 tmr_8253[chan].latched = TRUE;
452 dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
453 if (chan == 0) /* System timer divisor */
454 tmr_8253[chan].latch = dummy_ctr + (WORD)Dosvm.GetTimer();
457 /* FIXME: intelligent hardware timer emulation needed */
458 tmr_8253[chan].latch = dummy_ctr;
461 case 3: /* write lo byte, then hi byte */
462 tmr_8253[chan].byte_toggle = FALSE; /* init */
464 case 1: /* write lo byte only */
465 case 2: /* write hi byte only */
466 tmr_8253[chan].ctrlbyte_ch = (BYTE)value;
472 parport_8255[1] = (BYTE)value;
473 if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253[2].countmax != 1))
475 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253[2].countmax);
476 Beep(1193180 / tmr_8253[2].countmax, 20);
480 cmosaddress = (BYTE)value & 0x7f;
483 cmosimage[cmosaddress & 0x3f] = (BYTE)value;
487 VGA_ioport_out( port, (BYTE)value );
490 WARN("Direct I/O write attempted to port %x\n", port );