Sweden-Number/msdos/ioports.c

328 lines
7.3 KiB
C

/*
* Emulation of processor ioports.
*
* Copyright 1995 Morten Welinder
*/
/* 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 <string.h>
#include <time.h>
#include <unistd.h>
#include "windows.h"
#include "vga.h"
#include "options.h"
#include "debug.h"
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()
{
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(int, "calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
}
/**********************************************************************
* 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")) {
MSG("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
*/
DWORD IO_inport( int port, int count )
{
DWORD res = 0;
BYTE b;
#ifdef DIRECT_IO_ACCESS
if (do_direct_port_access)
{
/* Make sure we have access to the whole range */
int i;
for (i = 0; i < count; i++)
if (!(port_permissions[port+i] & IO_READ)) break;
if (i == count)
{
iopl(3);
switch(count)
{
case 1: res = inb( port ); break;
case 2: res = inw( port ); break;
case 4: res = inl( port ); break;
default:
ERR(int, "invalid count %d\n", count);
}
iopl(0);
return res;
}
}
#endif
TRACE(int, "%d bytes from port 0x%02x\n", count, port );
while (count-- > 0)
{
switch (port)
{
case 0x70:
b = cmosaddress;
break;
case 0x71:
b = cmosimage[cmosaddress & 0x3f];
break;
case 0x200:
case 0x201:
b = 0xff; /* no joystick */
break;
case 0x3da:
b = VGA_ioport_in( port );
break;
default:
WARN( int, "Direct I/O read attempted from port %x\n", port);
b = 0xff;
break;
}
port++;
res = (res << 8) | b;
}
TRACE(int, " returning ( 0x%lx )\n", res );
return res;
}
/**********************************************************************
* IO_outport
*/
void IO_outport( int port, int count, DWORD value )
{
BYTE b;
TRACE(int, "IO: 0x%lx (%d bytes) to port 0x%02x\n",
value, count, port );
#ifdef DIRECT_IO_ACCESS
if (do_direct_port_access)
{
/* Make sure we have access to the whole range */
int i;
for (i = 0; i < count; i++)
if (!(port_permissions[port+i] & IO_WRITE)) break;
if (i == count)
{
iopl(3);
switch(count)
{
case 1: outb( LOBYTE(value), port ); break;
case 2: outw( LOWORD(value), port ); break;
case 4: outl( value, port ); break;
default:
WARN(int, "Invalid count %d\n", count);
}
iopl(0);
return;
}
}
#endif
while (count-- > 0)
{
b = value & 0xff;
value >>= 8;
switch (port)
{
case 0x70:
cmosaddress = b & 0x7f;
break;
case 0x71:
cmosimage[cmosaddress & 0x3f] = b;
break;
case 0x3c8:
case 0x3c9:
VGA_ioport_out( port, b );
break;
default:
WARN(int, "Direct I/O write attempted to port %x\n", port );
break;
}
port++;
}
}