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
24 #include "debugtools.h"
27 DEFAULT_DEBUG_CHANNEL(int)
29 static WORD tmr_8253_countmax[3] = {0xffff, 0x12, 1}; /* [2] needs to be 1 ! */
30 /* if byte_toggle is TRUE, then hi byte has already been written */
31 static BOOL16 tmr_8253_byte_toggle[3] = {FALSE, FALSE, FALSE};
32 static WORD tmr_8253_latch[3] = {0, 0, 0};
34 /* 4th contents are dummy */
35 static BOOL16 tmr_8253_latched[4] = {FALSE, FALSE, FALSE, FALSE};
36 static BYTE tmr_8253_ctrlbyte_ch[4] = {0x06, 0x44, 0x86, 0};
38 static int dummy_ctr = 0;
40 static BYTE parport_8255[4] = {0x4f, 0x20, 0xff, 0xff};
42 static BYTE cmosaddress;
44 static BYTE cmosimage[64] =
46 0x27, 0x34, 0x31, 0x47, 0x16, 0x15, 0x00, 0x01,
47 0x04, 0x94, 0x26, 0x02, 0x50, 0x80, 0x00, 0x00,
48 0x40, 0xb1, 0x00, 0x9c, 0x01, 0x80, 0x02, 0x00,
49 0x1c, 0x00, 0x00, 0xad, 0x02, 0x10, 0x00, 0x00,
50 0x08, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x00,
51 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x03, 0x19,
52 0x00, 0x1c, 0x19, 0x81, 0x00, 0x0e, 0x00, 0x80,
53 0x1b, 0x7b, 0x21, 0x00, 0x00, 0x00, 0x05, 0x5f
56 #if defined(linux) && defined(__i386__)
57 # define DIRECT_IO_ACCESS
59 # undef DIRECT_IO_ACCESS
60 #endif /* linux && __i386__ */
62 #ifdef DIRECT_IO_ACCESS
64 extern int iopl(int level);
66 static char do_direct_port_access = 0;
67 static char port_permissions[0x10000];
72 #endif /* DIRECT_IO_ACCESS */
74 static void IO_FixCMOSCheckSum(void)
79 for (i=0x10; i < 0x2d; i++)
81 cmosimage[0x2e] = sum >> 8; /* yes, this IS hi byte !! */
82 cmosimage[0x2f] = sum & 0xff;
83 TRACE("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
86 static void set_timer_maxval(unsigned timer, unsigned maxval)
89 case 0: /* System timer counter divisor */
90 DOSVM_SetTimer(maxval);
92 case 1: /* RAM refresh */
93 FIXME("RAM refresh counter handling not implemented !");
95 case 2: /* cassette & speaker */
97 if (((BYTE)parport_8255[1] & 3) == 3)
99 TRACE("Beep (freq: %d) !\n", 1193180 / maxval );
100 Beep(1193180 / maxval, 20);
106 /**********************************************************************
110 /* set_IO_permissions(int val1, int val)
111 * Helper function for IO_port_init
113 #ifdef DIRECT_IO_ACCESS
114 static void set_IO_permissions(int val1, int val, char rw)
118 if (val == -1) val = 0x3ff;
119 for (j = val1; j <= val; j++)
120 port_permissions[j] |= rw;
122 do_direct_port_access = 1;
125 } else if (val != -1) {
126 do_direct_port_access = 1;
128 port_permissions[val] |= rw;
133 /* do_IO_port_init_read_or_write(char* temp, char rw)
134 * Helper function for IO_port_init
137 static void do_IO_port_init_read_or_write(char* temp, char rw)
139 int val, val1, i, len;
140 if (!strcasecmp(temp, "all")) {
141 MESSAGE("Warning!!! Granting FULL IO port access to"
142 " windoze programs!\nWarning!!! "
143 "*** THIS IS NOT AT ALL "
144 "RECOMMENDED!!! ***\n");
145 for (i=0; i < sizeof(port_permissions); i++)
146 port_permissions[i] |= rw;
148 } else if (!(!strcmp(temp, "*") || *temp == '\0')) {
152 for (i = 0; i < len; i++) {
155 if (temp[i+1] == 'x' || temp[i+1] == 'X') {
156 sscanf(temp+i, "%x", &val);
159 sscanf(temp+i, "%d", &val);
161 while (isxdigit(temp[i]))
168 set_IO_permissions(val1, val, rw);
173 if (val1 == -1) val1 = 0;
176 if (temp[i] >= '0' && temp[i] <= '9') {
177 sscanf(temp+i, "%d", &val);
178 while (isdigit(temp[i]))
183 set_IO_permissions(val1, val, rw);
187 static inline BYTE inb( WORD port )
190 __asm__ __volatile__( "inb %w1,%0" : "=a" (b) : "d" (port) );
194 static inline WORD inw( WORD port )
197 __asm__ __volatile__( "inw %w1,%0" : "=a" (w) : "d" (port) );
201 static inline DWORD inl( WORD port )
204 __asm__ __volatile__( "inl %w1,%0" : "=a" (dw) : "d" (port) );
208 static inline void outb( BYTE value, WORD port )
210 __asm__ __volatile__( "outb %b0,%w1" : : "a" (value), "d" (port) );
213 static inline void outw( WORD value, WORD port )
215 __asm__ __volatile__( "outw %w0,%w1" : : "a" (value), "d" (port) );
218 static inline void outl( DWORD value, WORD port )
220 __asm__ __volatile__( "outl %0,%w1" : : "a" (value), "d" (port) );
223 #endif /* DIRECT_IO_ACCESS */
227 #ifdef DIRECT_IO_ACCESS
230 /* Can we do that? */
234 PROFILE_GetWineIniString( "ports", "read", "*",
235 temp, sizeof(temp) );
236 do_IO_port_init_read_or_write(temp, IO_READ);
237 PROFILE_GetWineIniString( "ports", "write", "*",
238 temp, sizeof(temp) );
239 do_IO_port_init_read_or_write(temp, IO_WRITE);
241 #endif /* DIRECT_IO_ACCESS */
242 IO_FixCMOSCheckSum();
246 /**********************************************************************
249 * Note: The size argument has to be handled correctly _externally_
250 * (as we always return a DWORD)
252 DWORD IO_inport( int port, int size )
256 TRACE("%d-byte value from port 0x%02x\n", size, port );
258 #ifdef DIRECT_IO_ACCESS
259 if ((do_direct_port_access)
260 /* Make sure we have access to the port */
261 && (port_permissions[port] & IO_READ))
266 case 1: res = inb( port ); break;
267 case 2: res = inw( port ); break;
268 case 4: res = inl( port ); break;
270 ERR("invalid data size %d\n", size);
281 res = (DWORD)VGA_ioport_in( port );
287 BYTE chan = port & 3;
290 if (tmr_8253_latched[chan] == TRUE)
292 tempval = tmr_8253_latch[chan];
293 tmr_8253_latched[chan] = FALSE;
297 dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0));
298 if (chan == 0) /* System timer counter divisor */
299 /* FIXME: DOSVM_GetTimer() returns quite rigid values */
300 tempval = dummy_ctr+(WORD)DOSVM_GetTimer();
302 { /* FIXME: intelligent hardware timer emulation needed */
306 switch (tmr_8253_ctrlbyte_ch[chan] & 0x30)
309 break; /* correct ? */
310 case 0x10: /* read lo byte */
313 case 0x30: /* read lo byte, then hi byte */
314 tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */
315 if (tmr_8253_byte_toggle[chan] == TRUE)
320 /* else [fall through if read hi byte !] */
321 case 0x20: /* read hi byte */
322 res = (BYTE)tempval>>8;
328 res = INT_Int09ReadScan();
329 #if 0 /* what's this port got to do with parport ? */
330 res = (DWORD)parport_8255[0];
334 res = (DWORD)parport_8255[1];
337 res = (DWORD)parport_8255[2];
340 res = (DWORD)cmosaddress;
343 res = (DWORD)cmosimage[cmosaddress & 0x3f];
347 res = 0xffffffff; /* no joystick */
350 WARN("Direct I/O read attempted from port %x\n", port);
354 TRACE(" returning ( 0x%lx )\n", res );
359 /**********************************************************************
362 void IO_outport( int port, int size, DWORD value )
364 TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
367 #ifdef DIRECT_IO_ACCESS
368 if ((do_direct_port_access)
369 /* Make sure we have access to the port */
370 && (port_permissions[port] & IO_WRITE))
375 case 1: outb( LOBYTE(value), port ); break;
376 case 2: outw( LOWORD(value), port ); break;
377 case 4: outl( value, port ); break;
379 WARN("Invalid data size %d\n", size);
390 VGA_ioport_out( port, (BYTE)value );
393 DOSVM_PIC_ioport_out( port, (BYTE)value );
399 BYTE chan = port & 3;
402 if ( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) ||
403 /* we need to get the oldval before any lo/hi byte change has been made */
404 (tmr_8253_byte_toggle[chan] == FALSE) )
405 oldval = tmr_8253_countmax[chan];
406 switch (tmr_8253_ctrlbyte_ch[chan] & 0x30)
409 break; /* correct ? */
410 case 0x10: /* write lo byte */
411 tmr_8253_countmax[chan] =
412 (tmr_8253_countmax[chan] & 0xff00) | (BYTE)value;
414 case 0x30: /* write lo byte, then hi byte */
415 tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */
416 if (tmr_8253_byte_toggle[chan] == TRUE)
418 tmr_8253_countmax[chan] =
419 (tmr_8253_countmax[chan] & 0xff00) | (BYTE)value;
422 /* else [fall through if write hi byte !] */
423 case 0x20: /* write hi byte */
424 tmr_8253_countmax[chan] =
425 (tmr_8253_countmax[chan] & 0xff)|((BYTE)value << 8);
429 /* programming finished ? */
430 ( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) ||
431 (tmr_8253_byte_toggle[chan] == FALSE) )
432 /* update to new value ? */
433 && (tmr_8253_countmax[chan] != oldval)
435 set_timer_maxval(chan, tmr_8253_countmax[chan]);
440 BYTE chan = ((BYTE)value & 0xc0) >> 6;
442 /* ctrl byte for specific timer channel */
443 tmr_8253_ctrlbyte_ch[chan] = (BYTE)value;
445 FIXME("8254 timer readback not implemented yet\n");
448 if (((BYTE)value&0x30)==0) { /* latch timer */
449 tmr_8253_latched[chan] = TRUE;
450 dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0));
451 if (chan == 0) /* System timer divisor */
452 tmr_8253_latch[0] = dummy_ctr+(WORD)DOSVM_GetTimer();
454 { /* FIXME: intelligent hardware timer emulation needed */
455 tmr_8253_latch[chan] = dummy_ctr;
458 if ((value & 0x30) == 0x30) /* write lo byte, then hi byte */
459 tmr_8253_byte_toggle[((BYTE)value & 0xc0) >> 6] = FALSE; /* init */
463 parport_8255[1] = (BYTE)value;
464 if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253_countmax[2] != 1))
466 TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253_countmax[2]);
467 Beep(1193180 / tmr_8253_countmax[2], 20);
471 cmosaddress = (BYTE)value & 0x7f;
474 cmosimage[cmosaddress & 0x3f] = (BYTE)value;
477 WARN("Direct I/O write attempted to port %x\n", port );