| /* |
| * 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 <string.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include "windef.h" |
| #include "vga.h" |
| #include "dosexe.h" |
| #include "options.h" |
| #include "miscemu.h" |
| #include "debug.h" |
| #include "miscemu.h" |
| |
| 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(int, "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(int, "RAM refresh counter handling not implemented !"); |
| break; |
| case 2: /* cassette & speaker */ |
| /* speaker on ? */ |
| if (((BYTE)parport_8255[1] & 3) == 3) |
| { |
| TRACE(int, "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")) { |
| 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 |
| * |
| * 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(int, "%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(int, "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( int, "Direct I/O read attempted from port %x\n", port); |
| res = 0xffffffff; |
| break; |
| } |
| TRACE(int, " returning ( 0x%lx )\n", res ); |
| return res; |
| } |
| |
| |
| /********************************************************************** |
| * IO_outport |
| */ |
| void IO_outport( int port, int size, DWORD value ) |
| { |
| TRACE(int, "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(int, "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(int,"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(int, "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(int, "Direct I/O write attempted to port %x\n", port ); |
| break; |
| } |
| } |
