328 lines
7.3 KiB
C
328 lines
7.3 KiB
C
/*
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* Emulation of processor ioports.
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*
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* Copyright 1995 Morten Welinder
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*/
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/* Known problems:
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- only a few ports are emulated.
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- real-time clock in "cmos" is bogus. A nifty alarm() setup could
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fix that, I guess.
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*/
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "windows.h"
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#include "vga.h"
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#include "options.h"
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#include "debug.h"
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static BYTE cmosaddress;
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static BYTE cmosimage[64] =
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{
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0x27, 0x34, 0x31, 0x47, 0x16, 0x15, 0x00, 0x01,
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0x04, 0x94, 0x26, 0x02, 0x50, 0x80, 0x00, 0x00,
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0x40, 0xb1, 0x00, 0x9c, 0x01, 0x80, 0x02, 0x00,
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0x1c, 0x00, 0x00, 0xad, 0x02, 0x10, 0x00, 0x00,
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0x08, 0x00, 0x00, 0x26, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x03, 0x19,
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0x00, 0x1c, 0x19, 0x81, 0x00, 0x0e, 0x00, 0x80,
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0x1b, 0x7b, 0x21, 0x00, 0x00, 0x00, 0x05, 0x5f
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};
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#if defined(linux) && defined(__i386__)
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# define DIRECT_IO_ACCESS
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#else
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# undef DIRECT_IO_ACCESS
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#endif /* linux && __i386__ */
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#ifdef DIRECT_IO_ACCESS
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extern int iopl(int level);
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static char do_direct_port_access = 0;
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static char port_permissions[0x10000];
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#define IO_READ 1
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#define IO_WRITE 2
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#endif /* DIRECT_IO_ACCESS */
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static void IO_FixCMOSCheckSum()
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{
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WORD sum = 0;
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int i;
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for (i=0x10; i < 0x2d; i++)
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sum += cmosimage[i];
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cmosimage[0x2e] = sum >> 8; /* yes, this IS hi byte !! */
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cmosimage[0x2f] = sum & 0xff;
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TRACE(int, "calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
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}
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/**********************************************************************
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* IO_port_init
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*/
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/* set_IO_permissions(int val1, int val)
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* Helper function for IO_port_init
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*/
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#ifdef DIRECT_IO_ACCESS
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static void set_IO_permissions(int val1, int val, char rw)
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{
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int j;
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if (val1 != -1) {
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if (val == -1) val = 0x3ff;
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for (j = val1; j <= val; j++)
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port_permissions[j] |= rw;
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do_direct_port_access = 1;
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val1 = -1;
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} else if (val != -1) {
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do_direct_port_access = 1;
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port_permissions[val] |= rw;
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}
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}
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/* do_IO_port_init_read_or_write(char* temp, char rw)
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* Helper function for IO_port_init
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*/
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static void do_IO_port_init_read_or_write(char* temp, char rw)
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{
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int val, val1, i, len;
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if (!strcasecmp(temp, "all")) {
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MSG("Warning!!! Granting FULL IO port access to"
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" windoze programs!\nWarning!!! "
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"*** THIS IS NOT AT ALL "
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"RECOMMENDED!!! ***\n");
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for (i=0; i < sizeof(port_permissions); i++)
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port_permissions[i] |= rw;
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} else if (!(!strcmp(temp, "*") || *temp == '\0')) {
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len = strlen(temp);
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val = -1;
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val1 = -1;
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for (i = 0; i < len; i++) {
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switch (temp[i]) {
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case '0':
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if (temp[i+1] == 'x' || temp[i+1] == 'X') {
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sscanf(temp+i, "%x", &val);
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i += 2;
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} else {
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sscanf(temp+i, "%d", &val);
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}
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while (isxdigit(temp[i]))
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i++;
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i--;
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break;
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case ',':
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case ' ':
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case '\t':
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set_IO_permissions(val1, val, rw);
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val1 = -1; val = -1;
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break;
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case '-':
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val1 = val;
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if (val1 == -1) val1 = 0;
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break;
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default:
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if (temp[i] >= '0' && temp[i] <= '9') {
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sscanf(temp+i, "%d", &val);
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while (isdigit(temp[i]))
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i++;
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}
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}
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}
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set_IO_permissions(val1, val, rw);
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}
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}
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static __inline__ BYTE inb( WORD port )
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{
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BYTE b;
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__asm__ __volatile__( "inb %w1,%0" : "=a" (b) : "d" (port) );
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return b;
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}
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static __inline__ WORD inw( WORD port )
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{
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WORD w;
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__asm__ __volatile__( "inw %w1,%0" : "=a" (w) : "d" (port) );
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return w;
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}
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static __inline__ DWORD inl( WORD port )
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{
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DWORD dw;
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__asm__ __volatile__( "inl %w1,%0" : "=a" (dw) : "d" (port) );
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return dw;
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}
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static __inline__ void outb( BYTE value, WORD port )
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{
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__asm__ __volatile__( "outb %b0,%w1" : : "a" (value), "d" (port) );
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}
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static __inline__ void outw( WORD value, WORD port )
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{
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__asm__ __volatile__( "outw %w0,%w1" : : "a" (value), "d" (port) );
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}
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static __inline__ void outl( DWORD value, WORD port )
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{
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__asm__ __volatile__( "outl %0,%w1" : : "a" (value), "d" (port) );
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}
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#endif /* DIRECT_IO_ACCESS */
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void IO_port_init()
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{
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#ifdef DIRECT_IO_ACCESS
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char temp[1024];
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/* Can we do that? */
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if (!iopl(3)) {
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iopl(0);
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PROFILE_GetWineIniString( "ports", "read", "*",
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temp, sizeof(temp) );
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do_IO_port_init_read_or_write(temp, IO_READ);
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PROFILE_GetWineIniString( "ports", "write", "*",
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temp, sizeof(temp) );
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do_IO_port_init_read_or_write(temp, IO_WRITE);
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}
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#endif /* DIRECT_IO_ACCESS */
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IO_FixCMOSCheckSum();
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}
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/**********************************************************************
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* IO_inport
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*/
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DWORD IO_inport( int port, int count )
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{
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DWORD res = 0;
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BYTE b;
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#ifdef DIRECT_IO_ACCESS
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if (do_direct_port_access)
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{
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/* Make sure we have access to the whole range */
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int i;
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for (i = 0; i < count; i++)
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if (!(port_permissions[port+i] & IO_READ)) break;
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if (i == count)
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{
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iopl(3);
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switch(count)
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{
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case 1: res = inb( port ); break;
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case 2: res = inw( port ); break;
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case 4: res = inl( port ); break;
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default:
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ERR(int, "invalid count %d\n", count);
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}
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iopl(0);
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return res;
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}
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}
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#endif
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TRACE(int, "%d bytes from port 0x%02x\n", count, port );
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while (count-- > 0)
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{
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switch (port)
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{
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case 0x70:
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b = cmosaddress;
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break;
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case 0x71:
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b = cmosimage[cmosaddress & 0x3f];
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break;
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case 0x200:
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case 0x201:
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b = 0xff; /* no joystick */
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break;
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case 0x3da:
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b = VGA_ioport_in( port );
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break;
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default:
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WARN( int, "Direct I/O read attempted from port %x\n", port);
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b = 0xff;
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break;
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}
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port++;
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res = (res << 8) | b;
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}
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TRACE(int, " returning ( 0x%lx )\n", res );
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return res;
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}
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/**********************************************************************
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* IO_outport
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*/
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void IO_outport( int port, int count, DWORD value )
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{
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BYTE b;
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TRACE(int, "IO: 0x%lx (%d bytes) to port 0x%02x\n",
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value, count, port );
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#ifdef DIRECT_IO_ACCESS
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if (do_direct_port_access)
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{
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/* Make sure we have access to the whole range */
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int i;
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for (i = 0; i < count; i++)
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if (!(port_permissions[port+i] & IO_WRITE)) break;
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if (i == count)
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{
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iopl(3);
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switch(count)
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{
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case 1: outb( LOBYTE(value), port ); break;
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case 2: outw( LOWORD(value), port ); break;
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case 4: outl( value, port ); break;
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default:
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WARN(int, "Invalid count %d\n", count);
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}
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iopl(0);
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return;
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}
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}
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#endif
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while (count-- > 0)
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{
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b = value & 0xff;
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value >>= 8;
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switch (port)
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{
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case 0x70:
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cmosaddress = b & 0x7f;
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break;
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case 0x71:
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cmosimage[cmosaddress & 0x3f] = b;
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break;
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case 0x3c8:
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case 0x3c9:
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VGA_ioport_out( port, b );
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break;
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default:
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WARN(int, "Direct I/O write attempted to port %x\n", port );
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break;
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}
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port++;
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}
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}
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