537 lines
14 KiB
C
537 lines
14 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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* Copyright 1998 Andreas Mohr, Ove Kaaven
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 "config.h"
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#include "wine/port.h"
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#include <ctype.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include "windef.h"
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#include "winnls.h"
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#include "callback.h"
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#include "file.h"
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#include "miscemu.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(int);
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static struct {
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WORD countmax;
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BOOL16 byte_toggle; /* if TRUE, then hi byte has already been written */
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WORD latch;
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BOOL16 latched;
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BYTE ctrlbyte_ch;
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WORD oldval;
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} tmr_8253[3] = {
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{0xFFFF, FALSE, 0, FALSE, 0x36, 0},
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{0x0012, FALSE, 0, FALSE, 0x74, 0},
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{0x0001, FALSE, 0, FALSE, 0xB6, 0},
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};
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static int dummy_ctr = 0;
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static BYTE parport_8255[4] = {0x4f, 0x20, 0xff, 0xff};
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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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# undef PP_IO_ACCESS
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#endif /* linux && __i386__ */
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#ifdef HAVE_PPDEV
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static int do_pp_port_access = -1; /* -1: uninitialized, 1: not available
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0: available);*/
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#endif
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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 = -1;
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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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static void IO_FixCMOSCheckSum(void)
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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("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
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}
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#endif /* DIRECT_IO_ACCESS */
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static void set_timer_maxval(unsigned timer, unsigned maxval)
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{
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switch (timer) {
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case 0: /* System timer counter divisor */
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if (Dosvm.SetTimer) Dosvm.SetTimer(maxval);
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break;
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case 1: /* RAM refresh */
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FIXME("RAM refresh counter handling not implemented !\n");
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break;
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case 2: /* cassette & speaker */
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/* speaker on ? */
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if (((BYTE)parport_8255[1] & 3) == 3)
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{
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TRACE("Beep (freq: %d) !\n", 1193180 / maxval );
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Beep(1193180 / maxval, 20);
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}
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break;
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}
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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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MESSAGE("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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static void IO_port_init(void)
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{
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char temp[1024];
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WCHAR tempW[1024];
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static const WCHAR portsW[] = {'p','o','r','t','s',0};
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static const WCHAR readW[] = {'r','e','a','d',0};
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static const WCHAR writeW[] = {'w','r','i','t','e',0};
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static const WCHAR asteriskW[] = {'*',0};
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do_direct_port_access = 0;
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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( portsW, readW, asteriskW, tempW, 1024 );
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WideCharToMultiByte(CP_ACP, 0, tempW, -1, temp, 1024, NULL, NULL);
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do_IO_port_init_read_or_write(temp, IO_READ);
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PROFILE_GetWineIniString( portsW, writeW, asteriskW, tempW, 1024 );
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WideCharToMultiByte(CP_ACP, 0, tempW, -1, temp, 1024, NULL, NULL);
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do_IO_port_init_read_or_write(temp, IO_WRITE);
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}
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IO_FixCMOSCheckSum();
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}
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#endif /* DIRECT_IO_ACCESS */
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/**********************************************************************
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* IO_inport
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*
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* Note: The size argument has to be handled correctly _externally_
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* (as we always return a DWORD)
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*/
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DWORD IO_inport( int port, int size )
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{
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DWORD res = 0;
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TRACE("%d-byte value from port 0x%02x\n", size, port );
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#ifdef HAVE_PPDEV
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if (do_pp_port_access == -1)
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do_pp_port_access =IO_pp_init();
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if ((do_pp_port_access == 0 ) && (size == 1))
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if (!IO_pp_inp(port,&res))
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return res;
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#endif
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#ifdef DIRECT_IO_ACCESS
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if (do_direct_port_access == -1) IO_port_init();
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if ((do_direct_port_access)
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/* Make sure we have access to the port */
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&& (port_permissions[port] & IO_READ))
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{
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iopl(3);
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switch(size)
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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("invalid data size %d\n", size);
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}
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iopl(0);
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return res;
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}
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#endif
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/* first give the DOS VM a chance to handle it */
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if (Dosvm.inport && Dosvm.inport( port, size, &res )) return res;
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switch (port)
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{
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case 0x40:
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case 0x41:
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case 0x42:
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{
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BYTE chan = port & 3;
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WORD tempval = 0;
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if (tmr_8253[chan].latched)
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tempval = tmr_8253[chan].latch;
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else
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{
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dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
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if (chan == 0) /* System timer counter divisor */
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{
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/* FIXME: Dosvm.GetTimer() returns quite rigid values */
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if (Dosvm.GetTimer)
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tempval = dummy_ctr + (WORD)Dosvm.GetTimer();
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else
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tempval = dummy_ctr;
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}
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else
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{
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/* FIXME: intelligent hardware timer emulation needed */
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tempval = dummy_ctr;
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}
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}
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switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
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{
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case 0:
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res = 0; /* shouldn't happen? */
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break;
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case 1: /* read lo byte */
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res = (BYTE)tempval;
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tmr_8253[chan].latched = FALSE;
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break;
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case 3: /* read lo byte, then hi byte */
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tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
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if (tmr_8253[chan].byte_toggle)
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{
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res = (BYTE)tempval;
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break;
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}
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/* else [fall through if read hi byte !] */
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case 2: /* read hi byte */
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res = (BYTE)(tempval >> 8);
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tmr_8253[chan].latched = FALSE;
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break;
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}
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}
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break;
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case 0x60:
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#if 0 /* what's this port got to do with parport ? */
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res = (DWORD)parport_8255[0];
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#endif
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break;
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case 0x61:
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res = (DWORD)parport_8255[1];
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break;
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case 0x62:
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res = (DWORD)parport_8255[2];
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break;
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case 0x70:
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res = (DWORD)cmosaddress;
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break;
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case 0x71:
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res = (DWORD)cmosimage[cmosaddress & 0x3f];
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break;
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case 0x200:
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case 0x201:
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res = 0xffffffff; /* no joystick */
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break;
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default:
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WARN("Direct I/O read attempted from port %x\n", port);
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res = 0xffffffff;
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break;
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}
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TRACE(" 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 size, DWORD value )
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{
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TRACE("IO: 0x%lx (%d-byte value) to port 0x%02x\n",
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value, size, port );
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#ifdef HAVE_PPDEV
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if (do_pp_port_access == -1)
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do_pp_port_access = IO_pp_init();
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if ((do_pp_port_access == 0) && (size == 1))
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if (!IO_pp_outp(port,&value))
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return;
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#endif
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#ifdef DIRECT_IO_ACCESS
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if (do_direct_port_access == -1) IO_port_init();
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if ((do_direct_port_access)
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/* Make sure we have access to the port */
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&& (port_permissions[port] & IO_WRITE))
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{
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iopl(3);
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switch(size)
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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("Invalid data size %d\n", size);
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}
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iopl(0);
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return;
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}
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#endif
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/* first give the DOS VM a chance to handle it */
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if (Dosvm.outport && Dosvm.outport( port, size, value )) return;
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switch (port)
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{
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case 0x40:
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case 0x41:
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case 0x42:
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{
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BYTE chan = port & 3;
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/* we need to get the oldval before any lo/hi byte change has been made */
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if (((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
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!tmr_8253[chan].byte_toggle)
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tmr_8253[chan].oldval = tmr_8253[chan].countmax;
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switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
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{
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case 0:
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break; /* shouldn't happen? */
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case 1: /* write lo byte */
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tmr_8253[chan].countmax =
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(tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
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break;
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case 3: /* write lo byte, then hi byte */
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tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
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if (tmr_8253[chan].byte_toggle)
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{
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tmr_8253[chan].countmax =
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(tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
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break;
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}
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/* else [fall through if write hi byte !] */
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case 2: /* write hi byte */
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tmr_8253[chan].countmax =
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(tmr_8253[chan].countmax & 0x00ff) | ((BYTE)value << 8);
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break;
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}
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/* if programming is finished and value has changed
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then update to new value */
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if ((((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
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!tmr_8253[chan].byte_toggle) &&
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(tmr_8253[chan].countmax != tmr_8253[chan].oldval))
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set_timer_maxval(chan, tmr_8253[chan].countmax);
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}
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break;
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case 0x43:
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{
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BYTE chan = ((BYTE)value & 0xc0) >> 6;
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/* ctrl byte for specific timer channel */
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if (chan == 3)
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{
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FIXME("8254 timer readback not implemented yet\n");
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break;
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}
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switch (((BYTE)value & 0x30) >> 4)
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{
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case 0: /* latch timer */
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tmr_8253[chan].latched = TRUE;
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dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
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if (chan == 0) /* System timer divisor */
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if (Dosvm.GetTimer)
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tmr_8253[chan].latch = dummy_ctr + (WORD)Dosvm.GetTimer();
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else
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tmr_8253[chan].latch = dummy_ctr;
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else
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{
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/* FIXME: intelligent hardware timer emulation needed */
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tmr_8253[chan].latch = dummy_ctr;
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}
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break;
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case 3: /* write lo byte, then hi byte */
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tmr_8253[chan].byte_toggle = FALSE; /* init */
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/* fall through */
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case 1: /* write lo byte only */
|
|
case 2: /* write hi byte only */
|
|
tmr_8253[chan].ctrlbyte_ch = (BYTE)value;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case 0x61:
|
|
parport_8255[1] = (BYTE)value;
|
|
if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253[2].countmax != 1))
|
|
{
|
|
TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253[2].countmax);
|
|
Beep(1193180 / tmr_8253[2].countmax, 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;
|
|
}
|
|
}
|