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Bochs/bochs/cpu/flag_ctrl_pro.cc

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- add RCS Id to header of every file. This makes it easier to know what's going on when someone sends in a modified file.
2001-10-03 17:10:38 +04:00
/////////////////////////////////////////////////////////////////////////
// $Id: flag_ctrl_pro.cc,v 1.6 2001-10-03 13:10:37 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
- update copyright dates to 2001 for all mandrake headers - for bochs files with other header, replaced with current mandrake header
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// Copyright (C) 2001 MandrakeSoft S.A.
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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//
// 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
- parts of the SMP merge apparantly broke the debugger and this revision tries to fix it. The shortcuts to register names such as AX and DL are #defines in cpu/cpu.h, and they are defined in terms of BX_CPU_THIS_PTR. When BX_USE_CPU_SMF=1, this works fine. (This is what bochs used for a long time, and nobody used the SMF=0 mode at all.) To make SMP bochs work, I had to get SMF=0 mode working for the CPU so that there could be an array of cpus. When SMF=0 for the CPU, BX_CPU_THIS_PTR is defined to be "this->" which only works within methods of BX_CPU_C. Code outside of BX_CPU_C must reference BX_CPU(num) instead. - to try to enforce the correct use of AL/AX/DL/etc. shortcuts, they are now only #defined when "NEED_CPU_REG_SHORTCUTS" is #defined. This is only done in the cpu/*.cc code.
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#define NEED_CPU_REG_SHORTCUTS 1
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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#include "bochs.h"
merge in BRANCH-io-cleanup. To see the commit logs for this use either cvsweb or cvs update -r BRANCH-io-cleanup and then 'cvs log' the various files. In general this provides a generic interface for logging. logfunctions:: is a class that is inherited by some classes, and also . allocated as a standalone global called 'genlog'. All logging uses . one of the ::info(), ::error(), ::ldebug(), ::panic() methods of this . class through 'BX_INFO(), BX_ERROR(), BX_DEBUG(), BX_PANIC()' macros . respectively. . . An example usage: . BX_INFO(("Hello, World!\n")); iofunctions:: is a class that is allocated once by default, and assigned as the iofunction of each logfunctions instance. It is this class that maintains the file descriptor and other output related code, at this point using vfprintf(). At some future point, someone may choose to write a gui 'console' for bochs to which messages would be redirected simply by assigning a different iofunction class to the various logfunctions objects. More cleanup is coming, but this works for now. If you want to see alot of debugging output, in main.cc, change onoff[LOGLEV_DEBUG]=0 to =1. Comments, bugs, flames, to me: todd@fries.net
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#define LOG_THIS BX_CPU_THIS_PTR
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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void
BX_CPU_C::write_flags(Bit16u flags, Boolean change_IOPL, Boolean change_IF)
{
BX_CPU_THIS_PTR set_CF(flags & 0x01);
BX_CPU_THIS_PTR set_PF((flags >> 2) & 0x01);
BX_CPU_THIS_PTR set_AF((flags >> 4) & 0x01);
BX_CPU_THIS_PTR set_ZF((flags >> 6) & 0x01);
BX_CPU_THIS_PTR set_SF((flags >> 7) & 0x01);
#if 0
// +++
if (BX_CPU_THIS_PTR eflags.tf==0 && (flags&0x0100))
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
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BX_DEBUG(( "TF 0->1" ));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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else if (BX_CPU_THIS_PTR eflags.tf && !(flags&0x0100))
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
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BX_DEBUG(( "TF 1->0" ));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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else if (BX_CPU_THIS_PTR eflags.tf && (flags&0x0100))
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
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BX_DEBUG(( "TF 1->1" ));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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#endif
BX_CPU_THIS_PTR eflags.tf = (flags >> 8) & 0x01;
if (BX_CPU_THIS_PTR eflags.tf) {
BX_CPU_THIS_PTR async_event = 1;
}
if (change_IF)
BX_CPU_THIS_PTR eflags.if_ = (flags >> 9) & 0x01;
BX_CPU_THIS_PTR eflags.df = (flags >> 10) & 0x01;
BX_CPU_THIS_PTR set_OF((flags >> 11) & 0x01);
#if BX_CPU_LEVEL == 2
BX_CPU_THIS_PTR eflags.iopl = 0;
BX_CPU_THIS_PTR eflags.nt = 0;
#else
if (change_IOPL)
BX_CPU_THIS_PTR eflags.iopl = (flags >> 12) & 0x03;
BX_CPU_THIS_PTR eflags.nt = (flags >> 14) & 0x01;
#endif
}
#if BX_CPU_LEVEL >= 3
void
BX_CPU_C::write_eflags(Bit32u eflags_raw, Boolean change_IOPL, Boolean change_IF,
Boolean change_VM, Boolean change_RF)
{
BX_CPU_THIS_PTR set_CF(eflags_raw & 0x01);
BX_CPU_THIS_PTR set_PF((eflags_raw >> 2) & 0x01);
BX_CPU_THIS_PTR set_AF((eflags_raw >> 4) & 0x01);
BX_CPU_THIS_PTR set_ZF((eflags_raw >> 6) & 0x01);
BX_CPU_THIS_PTR set_SF((eflags_raw >> 7) & 0x01);
#if 0
// +++
if (BX_CPU_THIS_PTR eflags.tf==0 && (eflags_raw&0x0100))
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
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BX_DEBUG(( "TF 0->1" ));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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else if (BX_CPU_THIS_PTR eflags.tf && !(eflags_raw&0x0100))
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
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BX_DEBUG(( "TF 1->0" ));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
2001-04-10 05:04:59 +04:00
else if (BX_CPU_THIS_PTR eflags.tf && (eflags_raw&0x0100))
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
2001-05-30 22:56:02 +04:00
BX_DEBUG(( "TF 1->1" ));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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#endif
BX_CPU_THIS_PTR eflags.tf = (eflags_raw >> 8) & 0x01;
if (BX_CPU_THIS_PTR eflags.tf) {
BX_CPU_THIS_PTR async_event = 1;
}
if (change_IF)
BX_CPU_THIS_PTR eflags.if_ = (eflags_raw >> 9) & 0x01;
BX_CPU_THIS_PTR eflags.df = (eflags_raw >> 10) & 0x01;
BX_CPU_THIS_PTR set_OF((eflags_raw >> 11) & 0x01);
if (change_IOPL)
BX_CPU_THIS_PTR eflags.iopl = (eflags_raw >> 12) & 0x03;
BX_CPU_THIS_PTR eflags.nt = (eflags_raw >> 14) & 0x01;
if (change_VM) {
BX_CPU_THIS_PTR eflags.vm = (eflags_raw >> 17) & 0x01;
#if BX_SUPPORT_V8086_MODE == 0
if (BX_CPU_THIS_PTR eflags.vm)
strip '\n' from BX_{INFO,DEBUG,ERROR,PANIC} don't need it, moved the output of it into the general io functions. saves space, as well as removes the confusing output if a '\n' is left off
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BX_PANIC(("write_eflags: VM bit set: BX_SUPPORT_V8086_MODE==0"));
- entered original Bochs snapshot bochs-2000_0325a.tar.gz from ftp.bochs.com
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#endif
}
if (change_RF) {
BX_CPU_THIS_PTR eflags.rf = (eflags_raw >> 16) & 0x01;
}
#if BX_CPU_LEVEL >= 4
BX_CPU_THIS_PTR eflags.ac = (eflags_raw >> 18) & 0x01;
BX_CPU_THIS_PTR eflags.id = (eflags_raw >> 21) & 0x01;
#endif
}
#endif /* BX_CPU_LEVEL >= 3 */
Bit16u
BX_CPU_C::read_flags(void)
{
Bit16u flags;
flags = (get_CF()) |
(BX_CPU_THIS_PTR eflags.bit1 << 1) |
((get_PF()) << 2) |
(BX_CPU_THIS_PTR eflags.bit3 << 3) |
((get_AF()>0) << 4) |
(BX_CPU_THIS_PTR eflags.bit5 << 5) |
((get_ZF()>0) << 6) |
((get_SF()>0) << 7) |
(BX_CPU_THIS_PTR eflags.tf << 8) |
(BX_CPU_THIS_PTR eflags.if_ << 9) |
(BX_CPU_THIS_PTR eflags.df << 10) |
((get_OF()>0) << 11) |
(BX_CPU_THIS_PTR eflags.iopl << 12) |
(BX_CPU_THIS_PTR eflags.nt << 14) |
(BX_CPU_THIS_PTR eflags.bit15 << 15);
/* 8086: bits 12-15 always set to 1.
* 286: in real mode, bits 12-15 always cleared.
* 386+: real-mode: bit15 cleared, bits 14..12 are last loaded value
* protected-mode: bit 15 clear, bit 14 = last loaded, IOPL?
*/
#if BX_CPU_LEVEL < 2
flags |= 0xF000; /* 8086 nature */
#elif BX_CPU_LEVEL == 2
if (real_mode()) {
flags &= 0x0FFF; /* 80286 in real mode nature */
}
#else /* 386+ */
#endif
return(flags);
}
#if BX_CPU_LEVEL >= 3
Bit32u
BX_CPU_C::read_eflags(void)
{
Bit32u eflags_raw;
eflags_raw =
(get_CF()) |
(BX_CPU_THIS_PTR eflags.bit1 << 1) |
((get_PF()) << 2) |
(BX_CPU_THIS_PTR eflags.bit3 << 3) |
((get_AF()>0) << 4) |
(BX_CPU_THIS_PTR eflags.bit5 << 5) |
((get_ZF()>0) << 6) |
((get_SF()>0) << 7) |
(BX_CPU_THIS_PTR eflags.tf << 8) |
(BX_CPU_THIS_PTR eflags.if_ << 9) |
(BX_CPU_THIS_PTR eflags.df << 10) |
((get_OF()>0) << 11) |
(BX_CPU_THIS_PTR eflags.iopl << 12) |
(BX_CPU_THIS_PTR eflags.nt << 14) |
(BX_CPU_THIS_PTR eflags.bit15 << 15) |
(BX_CPU_THIS_PTR eflags.rf << 16) |
(BX_CPU_THIS_PTR eflags.vm << 17)
#if BX_CPU_LEVEL >= 4
| (BX_CPU_THIS_PTR eflags.ac << 18)
| (BX_CPU_THIS_PTR eflags.id << 21)
#endif
;
#if 0
/*
* 386+: real-mode: bit15 cleared, bits 14..12 are last loaded value
* protected-mode: bit 15 clear, bit 14 = last loaded, IOPL?
*/
#endif
return(eflags_raw);
}
#endif /* BX_CPU_LEVEL >= 3 */
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