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/////////////////////////////////////////////////////////////////////////
// $Id: io.cc,v 1.5 2001/10/03 13:10:37 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#define LOG_THIS BX_CPU_THIS_PTR
void
BX_CPU_C::INSB_YbDX(BxInstruction_t *i)
{
Bit8u value8=0;
if (BX_CPU_THIS_PTR cr0.pe && (BX_CPU_THIS_PTR eflags.vm || (CPL>IOPL))) {
if ( !BX_CPU_THIS_PTR allow_io(DX, 1) ) {
exception(BX_GP_EXCEPTION, 0, 0);
}
}
if (i->as_32) {
// Write a zero to memory, to trigger any segment or page
// faults before reading from IO port.
write_virtual_byte(BX_SEG_REG_ES, EDI, &value8);
value8 = BX_INP(DX, 1);
/* no seg override possible */
write_virtual_byte(BX_SEG_REG_ES, EDI, &value8);
if (BX_CPU_THIS_PTR eflags.df) {
EDI = EDI - 1;
}
else {
EDI = EDI + 1;
}
}
else {
// Write a zero to memory, to trigger any segment or page
// faults before reading from IO port.
write_virtual_byte(BX_SEG_REG_ES, DI, &value8);
value8 = BX_INP(DX, 1);
/* no seg override possible */
write_virtual_byte(BX_SEG_REG_ES, DI, &value8);
if (BX_CPU_THIS_PTR eflags.df) {
DI = DI - 1;
}
else {
DI = DI + 1;
}
}
}
void
BX_CPU_C::INSW_YvDX(BxInstruction_t *i)
// input word/doubleword from port to string
{
Bit32u edi;
unsigned int incr;
if (i->as_32)
edi = EDI;
else
edi = DI;
if (i->os_32) {
Bit32u value32=0;
if (BX_CPU_THIS_PTR cr0.pe && (BX_CPU_THIS_PTR eflags.vm || (CPL>IOPL))) {
if ( !BX_CPU_THIS_PTR allow_io(DX, 4) ) {
exception(BX_GP_EXCEPTION, 0, 0);
}
}
// Write a zero to memory, to trigger any segment or page
// faults before reading from IO port.
write_virtual_dword(BX_SEG_REG_ES, edi, &value32);
value32 = BX_INP(DX, 4);
/* no seg override allowed */
write_virtual_dword(BX_SEG_REG_ES, edi, &value32);
incr = 4;
}
else {
Bit16u value16=0;
if (BX_CPU_THIS_PTR cr0.pe && (BX_CPU_THIS_PTR eflags.vm || (CPL>IOPL))) {
if ( !BX_CPU_THIS_PTR allow_io(DX, 2) ) {
exception(BX_GP_EXCEPTION, 0, 0);
}
}
// Write a zero to memory, to trigger any segment or page
// faults before reading from IO port.
write_virtual_word(BX_SEG_REG_ES, edi, &value16);
value16 = BX_INP(DX, 2);
/* no seg override allowed */
write_virtual_word(BX_SEG_REG_ES, edi, &value16);
incr = 2;
}
if (i->as_32) {
if (BX_CPU_THIS_PTR eflags.df)
EDI = EDI - incr;
else
EDI = EDI + incr;
}
else {
if (BX_CPU_THIS_PTR eflags.df)
DI = DI - incr;
else
DI = DI + incr;
}
}
void
BX_CPU_C::OUTSB_DXXb(BxInstruction_t *i)
{
unsigned seg;
Bit8u value8;
Bit32u esi;
if (BX_CPU_THIS_PTR cr0.pe && (BX_CPU_THIS_PTR eflags.vm || (CPL>IOPL))) {
if ( !BX_CPU_THIS_PTR allow_io(DX, 1) ) {
exception(BX_GP_EXCEPTION, 0, 0);
}
}
if (!BX_NULL_SEG_REG(i->seg)) {
seg = i->seg;
}
else {
seg = BX_SEG_REG_DS;
}
if (i->as_32)
esi = ESI;
else
esi = SI;
read_virtual_byte(seg, esi, &value8);
BX_OUTP(DX, value8, 1);
if (i->as_32) {
if (BX_CPU_THIS_PTR eflags.df)
ESI -= 1;
else
ESI += 1;
}
else {
if (BX_CPU_THIS_PTR eflags.df)
SI -= 1;
else
SI += 1;
}
}
void
BX_CPU_C::OUTSW_DXXv(BxInstruction_t *i)
// output word/doubleword string to port
{
unsigned seg;
Bit32u esi;
unsigned int incr;
if (!BX_NULL_SEG_REG(i->seg)) {
seg = i->seg;
}
else {
seg = BX_SEG_REG_DS;
}
if (i->as_32)
esi = ESI;
else
esi = SI;
if (i->os_32) {
Bit32u value32;
if (BX_CPU_THIS_PTR cr0.pe && (BX_CPU_THIS_PTR eflags.vm || (CPL>IOPL))) {
if ( !BX_CPU_THIS_PTR allow_io(DX, 4) ) {
exception(BX_GP_EXCEPTION, 0, 0);
}
}
read_virtual_dword(seg, esi, &value32);
BX_OUTP(DX, value32, 4);
incr = 4;
}
else {
Bit16u value16;
if (BX_CPU_THIS_PTR cr0.pe && (BX_CPU_THIS_PTR eflags.vm || (CPL>IOPL))) {
if ( !BX_CPU_THIS_PTR allow_io(DX, 2) ) {
exception(BX_GP_EXCEPTION, 0, 0);
}
}
read_virtual_word(seg, esi, &value16);
BX_OUTP(DX, value16, 2);
incr = 2;
}
if (i->as_32) {
if (BX_CPU_THIS_PTR eflags.df)
ESI = ESI - incr;
else
ESI = ESI + incr;
}
else {
if (BX_CPU_THIS_PTR eflags.df)
SI = SI - incr;
else
SI = SI + incr;
}
}
void
BX_CPU_C::IN_ALIb(BxInstruction_t *i)
{
Bit8u al, imm8;
imm8 = i->Ib;
al = BX_CPU_THIS_PTR inp8(imm8);
AL = al;
}
void
BX_CPU_C::IN_eAXIb(BxInstruction_t *i)
{
Bit8u imm8;
imm8 = i->Ib;
#if BX_CPU_LEVEL > 2
if (i->os_32) {
Bit32u eax;
eax = BX_CPU_THIS_PTR inp32(imm8);
EAX = eax;
}
else
#endif /* BX_CPU_LEVEL > 2 */
{
Bit16u ax;
ax = BX_CPU_THIS_PTR inp16(imm8);
AX = ax;
}
}
void
BX_CPU_C::OUT_IbAL(BxInstruction_t *i)
{
Bit8u al, imm8;
imm8 = i->Ib;
al = AL;
BX_CPU_THIS_PTR outp8(imm8, al);
}
void
BX_CPU_C::OUT_IbeAX(BxInstruction_t *i)
{
Bit8u imm8;
imm8 = i->Ib;
#if BX_CPU_LEVEL > 2
if (i->os_32) {
BX_CPU_THIS_PTR outp32(imm8, EAX);
}
else
#endif /* BX_CPU_LEVEL > 2 */
{
BX_CPU_THIS_PTR outp16(imm8, AX);
}
}
void
BX_CPU_C::IN_ALDX(BxInstruction_t *i)
{
Bit8u al;
al = BX_CPU_THIS_PTR inp8(DX);
AL = al;
}
void
BX_CPU_C::IN_eAXDX(BxInstruction_t *i)
{
#if BX_CPU_LEVEL > 2
if (i->os_32) {
Bit32u eax;
eax = BX_CPU_THIS_PTR inp32(DX);
EAX = eax;
}
else
#endif /* BX_CPU_LEVEL > 2 */
{
Bit16u ax;
ax = BX_CPU_THIS_PTR inp16(DX);
AX = ax;
}
}
void
BX_CPU_C::OUT_DXAL(BxInstruction_t *i)
{
Bit16u dx;
Bit8u al;
dx = DX;
al = AL;
BX_CPU_THIS_PTR outp8(dx, al);
}
void
BX_CPU_C::OUT_DXeAX(BxInstruction_t *i)
{
Bit16u dx;
dx = DX;
#if BX_CPU_LEVEL > 2
if (i->os_32) {
BX_CPU_THIS_PTR outp32(dx, EAX);
}
else
#endif /* BX_CPU_LEVEL > 2 */
{
BX_CPU_THIS_PTR outp16(dx, AX);
}
}
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