mirror of
https://github.com/reactos/wine.git
synced 2024-11-26 21:20:25 +00:00
481 lines
12 KiB
C
481 lines
12 KiB
C
/*
|
|
* Emulation of processor ioports.
|
|
*
|
|
* Copyright 1995 Morten Welinder
|
|
* Copyright 1998 Andreas Mohr, Ove Kaaven
|
|
*/
|
|
|
|
/* Known problems:
|
|
- only a few ports are emulated.
|
|
- real-time clock in "cmos" is bogus. A nifty alarm() setup could
|
|
fix that, I guess.
|
|
*/
|
|
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include "windef.h"
|
|
#include "vga.h"
|
|
#include "dosexe.h"
|
|
#include "options.h"
|
|
#include "miscemu.h"
|
|
#include "debugtools.h"
|
|
|
|
DEFAULT_DEBUG_CHANNEL(int)
|
|
|
|
static WORD tmr_8253_countmax[3] = {0xffff, 0x12, 1}; /* [2] needs to be 1 ! */
|
|
/* if byte_toggle is TRUE, then hi byte has already been written */
|
|
static BOOL16 tmr_8253_byte_toggle[3] = {FALSE, FALSE, FALSE};
|
|
static WORD tmr_8253_latch[3] = {0, 0, 0};
|
|
|
|
/* 4th contents are dummy */
|
|
static BOOL16 tmr_8253_latched[4] = {FALSE, FALSE, FALSE, FALSE};
|
|
static BYTE tmr_8253_ctrlbyte_ch[4] = {0x06, 0x44, 0x86, 0};
|
|
|
|
static int dummy_ctr = 0;
|
|
|
|
static BYTE parport_8255[4] = {0x4f, 0x20, 0xff, 0xff};
|
|
|
|
static BYTE cmosaddress;
|
|
|
|
static BYTE cmosimage[64] =
|
|
{
|
|
0x27, 0x34, 0x31, 0x47, 0x16, 0x15, 0x00, 0x01,
|
|
0x04, 0x94, 0x26, 0x02, 0x50, 0x80, 0x00, 0x00,
|
|
0x40, 0xb1, 0x00, 0x9c, 0x01, 0x80, 0x02, 0x00,
|
|
0x1c, 0x00, 0x00, 0xad, 0x02, 0x10, 0x00, 0x00,
|
|
0x08, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x03, 0x19,
|
|
0x00, 0x1c, 0x19, 0x81, 0x00, 0x0e, 0x00, 0x80,
|
|
0x1b, 0x7b, 0x21, 0x00, 0x00, 0x00, 0x05, 0x5f
|
|
};
|
|
|
|
#if defined(linux) && defined(__i386__)
|
|
# define DIRECT_IO_ACCESS
|
|
#else
|
|
# undef DIRECT_IO_ACCESS
|
|
#endif /* linux && __i386__ */
|
|
|
|
#ifdef DIRECT_IO_ACCESS
|
|
|
|
extern int iopl(int level);
|
|
|
|
static char do_direct_port_access = 0;
|
|
static char port_permissions[0x10000];
|
|
|
|
#define IO_READ 1
|
|
#define IO_WRITE 2
|
|
|
|
#endif /* DIRECT_IO_ACCESS */
|
|
|
|
static void IO_FixCMOSCheckSum(void)
|
|
{
|
|
WORD sum = 0;
|
|
int i;
|
|
|
|
for (i=0x10; i < 0x2d; i++)
|
|
sum += cmosimage[i];
|
|
cmosimage[0x2e] = sum >> 8; /* yes, this IS hi byte !! */
|
|
cmosimage[0x2f] = sum & 0xff;
|
|
TRACE("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
|
|
}
|
|
|
|
static void set_timer_maxval(unsigned timer, unsigned maxval)
|
|
{
|
|
switch (timer) {
|
|
case 0: /* System timer counter divisor */
|
|
DOSVM_SetTimer(maxval);
|
|
break;
|
|
case 1: /* RAM refresh */
|
|
FIXME("RAM refresh counter handling not implemented !");
|
|
break;
|
|
case 2: /* cassette & speaker */
|
|
/* speaker on ? */
|
|
if (((BYTE)parport_8255[1] & 3) == 3)
|
|
{
|
|
TRACE("Beep (freq: %d) !\n", 1193180 / maxval );
|
|
Beep(1193180 / maxval, 20);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**********************************************************************
|
|
* IO_port_init
|
|
*/
|
|
|
|
/* set_IO_permissions(int val1, int val)
|
|
* Helper function for IO_port_init
|
|
*/
|
|
#ifdef DIRECT_IO_ACCESS
|
|
static void set_IO_permissions(int val1, int val, char rw)
|
|
{
|
|
int j;
|
|
if (val1 != -1) {
|
|
if (val == -1) val = 0x3ff;
|
|
for (j = val1; j <= val; j++)
|
|
port_permissions[j] |= rw;
|
|
|
|
do_direct_port_access = 1;
|
|
|
|
val1 = -1;
|
|
} else if (val != -1) {
|
|
do_direct_port_access = 1;
|
|
|
|
port_permissions[val] |= rw;
|
|
}
|
|
|
|
}
|
|
|
|
/* do_IO_port_init_read_or_write(char* temp, char rw)
|
|
* Helper function for IO_port_init
|
|
*/
|
|
|
|
static void do_IO_port_init_read_or_write(char* temp, char rw)
|
|
{
|
|
int val, val1, i, len;
|
|
if (!strcasecmp(temp, "all")) {
|
|
MESSAGE("Warning!!! Granting FULL IO port access to"
|
|
" windoze programs!\nWarning!!! "
|
|
"*** THIS IS NOT AT ALL "
|
|
"RECOMMENDED!!! ***\n");
|
|
for (i=0; i < sizeof(port_permissions); i++)
|
|
port_permissions[i] |= rw;
|
|
|
|
} else if (!(!strcmp(temp, "*") || *temp == '\0')) {
|
|
len = strlen(temp);
|
|
val = -1;
|
|
val1 = -1;
|
|
for (i = 0; i < len; i++) {
|
|
switch (temp[i]) {
|
|
case '0':
|
|
if (temp[i+1] == 'x' || temp[i+1] == 'X') {
|
|
sscanf(temp+i, "%x", &val);
|
|
i += 2;
|
|
} else {
|
|
sscanf(temp+i, "%d", &val);
|
|
}
|
|
while (isxdigit(temp[i]))
|
|
i++;
|
|
i--;
|
|
break;
|
|
case ',':
|
|
case ' ':
|
|
case '\t':
|
|
set_IO_permissions(val1, val, rw);
|
|
val1 = -1; val = -1;
|
|
break;
|
|
case '-':
|
|
val1 = val;
|
|
if (val1 == -1) val1 = 0;
|
|
break;
|
|
default:
|
|
if (temp[i] >= '0' && temp[i] <= '9') {
|
|
sscanf(temp+i, "%d", &val);
|
|
while (isdigit(temp[i]))
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
set_IO_permissions(val1, val, rw);
|
|
}
|
|
}
|
|
|
|
static inline BYTE inb( WORD port )
|
|
{
|
|
BYTE b;
|
|
__asm__ __volatile__( "inb %w1,%0" : "=a" (b) : "d" (port) );
|
|
return b;
|
|
}
|
|
|
|
static inline WORD inw( WORD port )
|
|
{
|
|
WORD w;
|
|
__asm__ __volatile__( "inw %w1,%0" : "=a" (w) : "d" (port) );
|
|
return w;
|
|
}
|
|
|
|
static inline DWORD inl( WORD port )
|
|
{
|
|
DWORD dw;
|
|
__asm__ __volatile__( "inl %w1,%0" : "=a" (dw) : "d" (port) );
|
|
return dw;
|
|
}
|
|
|
|
static inline void outb( BYTE value, WORD port )
|
|
{
|
|
__asm__ __volatile__( "outb %b0,%w1" : : "a" (value), "d" (port) );
|
|
}
|
|
|
|
static inline void outw( WORD value, WORD port )
|
|
{
|
|
__asm__ __volatile__( "outw %w0,%w1" : : "a" (value), "d" (port) );
|
|
}
|
|
|
|
static inline void outl( DWORD value, WORD port )
|
|
{
|
|
__asm__ __volatile__( "outl %0,%w1" : : "a" (value), "d" (port) );
|
|
}
|
|
|
|
#endif /* DIRECT_IO_ACCESS */
|
|
|
|
void IO_port_init()
|
|
{
|
|
#ifdef DIRECT_IO_ACCESS
|
|
char temp[1024];
|
|
|
|
/* Can we do that? */
|
|
if (!iopl(3)) {
|
|
iopl(0);
|
|
|
|
PROFILE_GetWineIniString( "ports", "read", "*",
|
|
temp, sizeof(temp) );
|
|
do_IO_port_init_read_or_write(temp, IO_READ);
|
|
PROFILE_GetWineIniString( "ports", "write", "*",
|
|
temp, sizeof(temp) );
|
|
do_IO_port_init_read_or_write(temp, IO_WRITE);
|
|
}
|
|
#endif /* DIRECT_IO_ACCESS */
|
|
IO_FixCMOSCheckSum();
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* IO_inport
|
|
*
|
|
* Note: The size argument has to be handled correctly _externally_
|
|
* (as we always return a DWORD)
|
|
*/
|
|
DWORD IO_inport( int port, int size )
|
|
{
|
|
DWORD res = 0;
|
|
|
|
TRACE("%d-byte value from port 0x%02x\n", size, port );
|
|
|
|
#ifdef DIRECT_IO_ACCESS
|
|
if ((do_direct_port_access)
|
|
/* Make sure we have access to the port */
|
|
&& (port_permissions[port] & IO_READ))
|
|
{
|
|
iopl(3);
|
|
switch(size)
|
|
{
|
|
case 1: res = inb( port ); break;
|
|
case 2: res = inw( port ); break;
|
|
case 4: res = inl( port ); break;
|
|
default:
|
|
ERR("invalid data size %d\n", size);
|
|
}
|
|
iopl(0);
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
switch (port)
|
|
{
|
|
case 0x3ba:
|
|
case 0x3da:
|
|
res = (DWORD)VGA_ioport_in( port );
|
|
break;
|
|
case 0x40:
|
|
case 0x41:
|
|
case 0x42:
|
|
{
|
|
BYTE chan = port & 3;
|
|
WORD tempval = 0;
|
|
|
|
if (tmr_8253_latched[chan] == TRUE)
|
|
{
|
|
tempval = tmr_8253_latch[chan];
|
|
tmr_8253_latched[chan] = FALSE;
|
|
}
|
|
else
|
|
{
|
|
dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0));
|
|
if (chan == 0) /* System timer counter divisor */
|
|
/* FIXME: DOSVM_GetTimer() returns quite rigid values */
|
|
tempval = dummy_ctr+(WORD)DOSVM_GetTimer();
|
|
else
|
|
{ /* FIXME: intelligent hardware timer emulation needed */
|
|
tempval = dummy_ctr;
|
|
}
|
|
}
|
|
switch (tmr_8253_ctrlbyte_ch[chan] & 0x30)
|
|
{
|
|
case 0x00:
|
|
break; /* correct ? */
|
|
case 0x10: /* read lo byte */
|
|
res = (BYTE)tempval;
|
|
break;
|
|
case 0x30: /* read lo byte, then hi byte */
|
|
tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */
|
|
if (tmr_8253_byte_toggle[chan] == TRUE)
|
|
{
|
|
res = (BYTE)tempval;
|
|
break;
|
|
}
|
|
/* else [fall through if read hi byte !] */
|
|
case 0x20: /* read hi byte */
|
|
res = (BYTE)tempval>>8;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case 0x60:
|
|
res = INT_Int09ReadScan();
|
|
#if 0 /* what's this port got to do with parport ? */
|
|
res = (DWORD)parport_8255[0];
|
|
#endif
|
|
break;
|
|
case 0x61:
|
|
res = (DWORD)parport_8255[1];
|
|
break;
|
|
case 0x62:
|
|
res = (DWORD)parport_8255[2];
|
|
break;
|
|
case 0x70:
|
|
res = (DWORD)cmosaddress;
|
|
break;
|
|
case 0x71:
|
|
res = (DWORD)cmosimage[cmosaddress & 0x3f];
|
|
break;
|
|
case 0x200:
|
|
case 0x201:
|
|
res = 0xffffffff; /* no joystick */
|
|
break;
|
|
default:
|
|
WARN("Direct I/O read attempted from port %x\n", port);
|
|
res = 0xffffffff;
|
|
break;
|
|
}
|
|
TRACE(" returning ( 0x%lx )\n", res );
|
|
return res;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* IO_outport
|
|
*/
|
|
void IO_outport( int port, int size, DWORD value )
|
|
{
|
|
TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
|
|
value, size, port );
|
|
|
|
#ifdef DIRECT_IO_ACCESS
|
|
if ((do_direct_port_access)
|
|
/* Make sure we have access to the port */
|
|
&& (port_permissions[port] & IO_WRITE))
|
|
{
|
|
iopl(3);
|
|
switch(size)
|
|
{
|
|
case 1: outb( LOBYTE(value), port ); break;
|
|
case 2: outw( LOWORD(value), port ); break;
|
|
case 4: outl( value, port ); break;
|
|
default:
|
|
WARN("Invalid data size %d\n", size);
|
|
}
|
|
iopl(0);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
switch (port)
|
|
{
|
|
case 0x3c8:
|
|
case 0x3c9:
|
|
VGA_ioport_out( port, (BYTE)value );
|
|
break;
|
|
case 0x20:
|
|
DOSVM_PIC_ioport_out( port, (BYTE)value );
|
|
break;
|
|
case 0x40:
|
|
case 0x41:
|
|
case 0x42:
|
|
{
|
|
BYTE chan = port & 3;
|
|
WORD oldval = 0;
|
|
|
|
if ( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) ||
|
|
/* we need to get the oldval before any lo/hi byte change has been made */
|
|
(tmr_8253_byte_toggle[chan] == FALSE) )
|
|
oldval = tmr_8253_countmax[chan];
|
|
switch (tmr_8253_ctrlbyte_ch[chan] & 0x30)
|
|
{
|
|
case 0x00:
|
|
break; /* correct ? */
|
|
case 0x10: /* write lo byte */
|
|
tmr_8253_countmax[chan] =
|
|
(tmr_8253_countmax[chan] & 0xff00) | (BYTE)value;
|
|
break;
|
|
case 0x30: /* write lo byte, then hi byte */
|
|
tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */
|
|
if (tmr_8253_byte_toggle[chan] == TRUE)
|
|
{
|
|
tmr_8253_countmax[chan] =
|
|
(tmr_8253_countmax[chan] & 0xff00) | (BYTE)value;
|
|
break;
|
|
}
|
|
/* else [fall through if write hi byte !] */
|
|
case 0x20: /* write hi byte */
|
|
tmr_8253_countmax[chan] =
|
|
(tmr_8253_countmax[chan] & 0xff)|((BYTE)value << 8);
|
|
break;
|
|
}
|
|
if (
|
|
/* programming finished ? */
|
|
( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) ||
|
|
(tmr_8253_byte_toggle[chan] == FALSE) )
|
|
/* update to new value ? */
|
|
&& (tmr_8253_countmax[chan] != oldval)
|
|
)
|
|
set_timer_maxval(chan, tmr_8253_countmax[chan]);
|
|
}
|
|
break;
|
|
case 0x43:
|
|
{
|
|
BYTE chan = ((BYTE)value & 0xc0) >> 6;
|
|
|
|
/* ctrl byte for specific timer channel */
|
|
tmr_8253_ctrlbyte_ch[chan] = (BYTE)value;
|
|
if (chan == 3) {
|
|
FIXME("8254 timer readback not implemented yet\n");
|
|
}
|
|
else
|
|
if (((BYTE)value&0x30)==0) { /* latch timer */
|
|
tmr_8253_latched[chan] = TRUE;
|
|
dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0));
|
|
if (chan == 0) /* System timer divisor */
|
|
tmr_8253_latch[0] = dummy_ctr+(WORD)DOSVM_GetTimer();
|
|
else
|
|
{ /* FIXME: intelligent hardware timer emulation needed */
|
|
tmr_8253_latch[chan] = dummy_ctr;
|
|
}
|
|
}
|
|
if ((value & 0x30) == 0x30) /* write lo byte, then hi byte */
|
|
tmr_8253_byte_toggle[((BYTE)value & 0xc0) >> 6] = FALSE; /* init */
|
|
}
|
|
break;
|
|
case 0x61:
|
|
parport_8255[1] = (BYTE)value;
|
|
if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253_countmax[2] != 1))
|
|
{
|
|
TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253_countmax[2]);
|
|
Beep(1193180 / tmr_8253_countmax[2], 20);
|
|
}
|
|
break;
|
|
case 0x70:
|
|
cmosaddress = (BYTE)value & 0x7f;
|
|
break;
|
|
case 0x71:
|
|
cmosimage[cmosaddress & 0x3f] = (BYTE)value;
|
|
break;
|
|
default:
|
|
WARN("Direct I/O write attempted to port %x\n", port );
|
|
break;
|
|
}
|
|
}
|