printed to stderr in the text debugger. Also allows the user to
type (text) debugger commands directly, which also appear in the log.
- all text output in the debugger now passes through dbg_printf()
(used to be fprintf to stderr) so that in wxWindows I can redirect
it all to the wxWindows debug log screen. Added debug_fputs to
siminterface which actually sends the text to the GUI by creating
a BX_ASYNC_EVT_DBG_MSG event.
- changed prefix and msg fields of BxLogMsgEvent to const char *,
and also in args of logmsg method of siminterface.
- don't trap SIGINT in wxWindows. There are other ways to stop execution.
Also, signal handling with multiple threads is very strange and different
on different platforms.
- minor changes to fix gcc -Wall warnings in dbg_main.cc
- add a new boolean parameter BXP_DEBUG_RUNNING that tells if the debugger is
running freely or not. This is used by the wxWindows GUI to enable or
disable certain choices.
- CpuRegistersDialog has continue,stop,step buttons. When the sim is running
freely, I disable continue and step, and enable stop. When the sim stops
to wait for the user, I disable stop and enable continue and step. The
change of enables used to be triggered by actually pressing the button,
but then if you started/stopped the simulation in some other way (typing
in debug log window) the enables were never changed. Now the enables are
controlled by the value of BXP_DEBUG_RUNNING, which is set by the debug code
itself, and the buttons are enabled at the right time.
- ParamDialog::Refresh() is now virtual so that child classes can redefine
its refresh behavior.
- in safeWxStrcpy, force the last element of the array to be a 0, since
I noticed that strncpy is not guaranteed to terminate the string!
- modified: debug/dbg_main.cc debug/debug.h gui/siminterface.cc
gui/siminterface.h gui/wxdialog.cc gui/wxdialog.h gui/wxmain.cc
gui/wxmain.h
printing a message when a reserved bit was set, but not causing
a #GP(0). As well, I force a new PAE support option to 1 when
Hammer support is enabled.
circular dependencies between 3 cpu related libs that I need
as part of this transition. I changed the "ar rv" to "ld -i -o"
to do an incremental load instead of an archive. Hope this
doesn't break any platforms. We can reset this later.
at the appropriate times. For example, you can't stop when you're
stopped. You can't step when it's running.
- modified: gui/wxdialog.cc gui/wxdialog.h
called cpu_mode. Now there is one for cpu32, but it is declared:
static const unsigned cpu_mode=BX_MODE_IA32;
This way the compiler can compile-out if-then-else clauses based
on it, allowing for easier code sharing.
Bochs debugger. The Bochs debugger calls SIM->debug_get_next_command() which
does not return until a debugger command is found. The siminterface sends an
synchronous event to the wxWindows thread with a blank to be filled in with a
debugger command. wxWindows fills in the blank and sends the synchronous
event back, and the Bochs debugger interprets it as if it was typed on
the command line. For the long term I haven't decided whether to stick with
sending text strings vs. some other method.
- so far the wxWindows debugger consists of one big dialog box that shows
all the standard registers, and a working Continue, Stop, and Step button.
- modify ParamDialog so that it is more useful as a base class, by moving
some things to protected members&fields, separating out functionality
that is most likely to be replaced into virtual functions, and making it
generally more flexible. The new CpuRegistersDialog is based on
ParamDialog.
- in wxdialog.cc, continue the convention of using wxID_HELP, wxID_OK,
wxID_CANCEL, etc. for the id's of buttons, instead of wxHELP, wxOK, etc.
which are intended to be ORred together in a bit field.
- cpu/init.cc: put ifdefs around DEFPARAMs for flags in configurations
where they don't exist. Add an eflags shadow parameter that represents all
of the bits of eflags at once. There are also boolean shadow params for
each bit.
- modified files: cpu/init.cc debug/dbg_main.cc debug/debug.h
gui/siminterface.cc gui/siminterface.h gui/wxdialog.cc gui/wxdialog.h
gui/wxmain.cc gui/wxmain.h
member functions are turned on, BX_CPU_C_PREFIX expands to nothing, and any
method that uses BX_CPU_C_PREFIX instead of explictly writing "BX_CPU_C::"
will not be a member function at all. This makes it impossible for code
outside the BX_CPU_C object to call the accessor because sometimes the method
is at ptr_to_cpu->get_EIP() and other times you'd have to do just get_EIP().
The only way I've found to solve this is to remove the BX_CPU_C_PREFIX
and write BX_CPU_C:: instead.
- in debug/dbg_main.cc I removed the EBP, EIP, ESP, SP shortcuts. Now
the accessors are used everywhere. Also I replaced a reference to
the short-lived get_erx() accessor with ones that work: get_EAX(), etc.
- with these changes the current cvs compiles with any combination of
debugger enabled/disabled, SMP enabled/disabled, and x86-64 enabled/disabled.
BX_READ_8BIT_REG() --> BX_READ_8BIT_REGx()
BX_WRITE_8BIT_REG() --> BX_WRITE_8BIT_REGx()
They use an extra parameter "extended". I coded this
as the macro without the "x" for cpu32 compiles. This
allows for ease of merging and code sharing.
to incrementally merge files. For a test, shift16.cc is always
compiled in the cpu/ directory regardless of 32/64-bit configure.
Ultimately, all files will migrate from cpu64 to cpu.
- add get_erx() method to bx_gen_reg_t which returns the erx field of the
structure (which is has a different name in cpu and cpu64). Providing
an accessor is one strategy for avoiding igly "#ifdef BX_SUPPORT_X86_64"
statements in the rest of the code.
- cpu64/init.cc: the "eflags" before get_flag and set_flag is no longer
correct. removed.
- modified files: load32bitOShack.cc logio.cc cpu/cpu.h cpu64/apic.cc
cpu64/cpu.h cpu64/init.cc cpu64/proc_ctrl.cc debug/dbg_main.cc
cpu64 directories. Instead of using the macros introduced in cpu.h rev 1.37
such as GetEFlagsDFLogical and SetEFlagsDF and ClearEFlagsDF, I made inline
methods on the BX_CPU_C object that access the eflags fields. The problem
with the macros is that they cannot be used outside the BX_CPU_C object. The
macros have now been removed, and all references to eflags now use these new
accessors.
- I debated whether to put the accessors as members of the BX_CPU_C object
or members of the bx_flags_reg_t struct. I chose to make them members
of BX_CPU_C for two reasons: 1. the lazy flags are implemented as
members of BX_CPU_C, and 2. the eflags are referenced in many many places
and it is more compact without having to put eflags in front of each. (The
real problem with compactness is having to write BX_CPU_THIS_PTR in front of
everything, but that's another story.)
- Kevin pointed out a major bug in my set accessor code. What a difference a
little tilde can make! That is fixed now.
- modified: load32bitOShack.cc debug/dbg_main.cc
and in both cpu and cpu64 directories:
cpu.cc cpu.h ctrl_xfer_pro.cc debugstuff.cc exception.cc flag_ctrl.cc
flag_ctrl_pro.cc init.cc io.cc io_pro.cc proc_ctrl.cc soft_int.cc
string.cc vm8086.cc
This adds a whole new directory cpu64 with the new emulation code.
Very few changes were necessary outside cpu64. To try it, configure
with --enable-x86-64 and make.
- also this adds Peter Tattam's external debugger interface.
- modified files: Makefile.in bochs.h config.h.in configure.in
load32bitOShack.cc logio.cc cpu/Makefile.in cpu/cpu.cc debug/dbg_main.cc
- added files: cpu/extdb.cc cpu/extdb.h and cpu64/*
This adds a whole new directory cpu64 with the new emulation code.
Very few changes were necessary outside cpu64. To try it, configure
with --enable-x86-64 and make.
- also this adds Peter Tattam's external debugger interface.
- modified files: Makefile.in bochs.h config.h.in configure.in
load32bitOShack.cc logio.cc cpu/Makefile.in cpu/cpu.cc debug/dbg_main.cc
- added files: cpu/extdb.cc cpu/extdb.h and cpu64/*
performance of the ne2K driver in win9x."
- receive timer set to 10000 instructions instead of 1000000.
- placed if (WaitForSingleObject(lpAdapter->ReadEvent,0) == WAIT_OBJECT_0) {}
around the read code.
> This is the bug fix to make the reset button work properly when the cpu
> is in the halt state. There is another patch in init.cc as well to clear
> async_event. If you don't do this, if a cpu goes into HLT, the only thing
> which will fix it is another interrupt. The reset button won't work.
a consistent way of accessing these flags that works both inside and
outside the BX_CPU class, I added inline accessor methods for each
flag: assert_FLAG(), clear_FLAG(), set_FLAG(value), and get_FLAG ()
that returns its value. I use assert to mean "set the value to one"
to avoid confusion, since there's also a set method that takes a value.
- the eflags access macros (e.g. GetEFlagsDFLogical, ClearEFlagsTF) are
now defined in terms of the inline accessors. In most cases it will
result in the same code anyway. The major advantage of the accesors
is that they can be used from inside or outside the BX_CPU object, while
the macros can only be used from inside.
- since almost all eflags were stored in val32 now, I went ahead and
removed the if_, rf, and vm fields. Now the val32 bit is the
"official" value for these flags, and they have accessors just like
everything else.
- init.cc: move the registration of registers until after they have been
initialized so that the initial value of each parameter is correct.
Modified files:
debug/dbg_main.cc cpu/cpu.h cpu/debugstuff.cc cpu/flag_ctrl.cc
cpu/flag_ctrl_pro.cc cpu/init.cc
length. (The first guinea pig is the 2-bit IOPL field in eflags.)
Also it can have a pointer to a Bit8u, Bit16u, Bit32u and signed
equivalents and do the right thing.
- add lots more CPU fields as parameters: EBP ESI EDI ESP, all segment regs,
LDTR, GDTR, eflags, DR*, TR*, CR*. These are all visible on a
ridiculously tall dialog box that will one day become the debugger.
wxWindows thread. However, when the wxWindows thread calls
Bochs code, for example SIM->some_action() that triggers a
BX_PANIC(), then the Sim2CI event is created in the wxWindows
thread. This used to cause thread deadlock, but now it is
recognized and handled safely.
You need to use '--enable-global-pages' to configure in support.
If you have something to boot that uses them, give them a
spin. Really the were introduced for PPro and above, but
I haven't put in any limits. CPUID and CR4 report the proper
bits when configured, regardless of --enable-cpu-level at the
moment.
if off, we were still reading CR3 from the TSS and reloading
it! This was causing problems with a DOS extender. When
paging is turned back on, CR3 would be incorrect.
with GCC) align them with the GCC special alignment attribute.
Since there was then one available field, I split the protection
attributes and native host pointers into their own fields.
Before, with 3 dwords per TLB entry, some entries (about 3/8)
were spanning two processor cache lines (assuming a 32-byte
cache line). Now, they all fit within one cache line.
Knocked about 1.4% off Win95 boot time, probably more off normal
software runs.
BX_READ not 0. BX_READ was 10. While I was at it, I did
change BX_{READ,WRITE,RW} to {0,1,2} rather than {10,11,12}
in case that helps optimize code.
There may be more paging checks we should do before changing
any state, to avoid receiving a page fault in the middle.
I put some extra comments in there.
to request bulk IO operations to IO devices which are bulk IO aware.
Currently, I modified only harddrv.cc to be aware. I added some
fields to the bx_devices_c class for the IO instructions to
place requests and receive responses from the IO device emulation.
Devices except the hard drive, don't monitor these fields so they
respond as normal. The hard drive now monitors these fields for
bulk requests, and if enabled, it memcpy()'s data straight from
the disk buffer to memory. This eliminates numerous inp/outp calling
sequences per disk sector.
I used the fields in bx_devices_c so that I would not have to
disrupt most IO device modules. Enhancements can be made to
other devices if they use high-bandwidth IO via in/out instructions.
vga_charmap
- the SDL gui uses the charmap data for the vga text display
* TODO: implement this feature for other guis
- removed unused variables in sdl.cc and gui.cc
- fixed a warning in vga.cc
All the EFLAGS bits used to be cached in separate fields. I left
a few of them in separate fields for now - might remove them
at some point also. When the arithmetic fields are known
(ie they're not in lazy mode), they are all cached in a
32-bit EFLAGS image, just like the x86 EFLAGS register expects.
All other eflags are store in the 32-bit register also, with
a few also mirrored in separate fields for now.
The reason I did this, was so that on x86 hosts, asm() statements
can be #ifdef'd in to do the calculation and get the native
eflags results very cheaply. Just to test that it works, I
coded ADD_EdId() and ADD_EwIw() with some conditionally compiled
asm()s for accelerated eflags processing and it works.
-Kevin
it can decide how to proceed. Some of those bits are necessary
to make TLB invalidation decisions. INVLPG doesn't cause
a whole TLB flush anymore, just one page. Some of the
current CPU behaviours model the P6, especially on CR0
reloads. Earlier processors kept some pre-change pre-fetched
instructions until a branch. We could probably model that
by setting a flag, and letting the revalidate_prefetch_q
function cause serialization.
The TLB flush code only invalidates entries which are not
already invalidated for the case where the TLB invalidation
ID trick is not in use.
Read-Modify-Write instructions. The first read phase stores
the host pointer in the "pages" field if a direct use pointer
is available. The Write phase first checks if a pointer was
issued and uses it for a direct write if available.
I chose the "pages" field since it needs to be checked by the
write_RMW_virtual variants anyways and thus needs to be
cached anyways.
Mostly the mods where to access.cc, but I did also macro-ize
the calls to write_RMW_virtual...() in files which use it
and cpu.h. Right now, the macro is just a straight pass-through.
I tried expanding it to a quick initial check for the pointer
availability to do the write in-place, with a function call
as a fall-back. That didn't seemed to matter at all.
Booting is not helped by this really. The upper bound of
the gain is 5 or 6%, and that's only if you have a loop that
looks like:
label:
add [eax], ebx ;; mega read-modify-write instruction
jmp label ;; intensive loop.
Kevin Lawton says he doesn't get a performance benefit.
I'm not sure if I do. Either way, the difference isn't
very large.
This code may get removed if it turns out to be useless.
- modified files: config.h.in cpu/init.cc debug/dbg_main.cc gui/control.cc
gui/siminterface.cc gui/siminterface.h gui/wxdialog.cc gui/wxdialog.h
gui/wxmain.cc gui/wxmain.h iodev/keyboard.cc
----------------------------------------------------------------------
Patch name: patch.wx-show-cpu2
Author: Bryce Denney
Date: Fri Sep 6 12:13:28 EDT 2002
Description:
Second try at implementing the "Debug:Show Cpu" and "Debug:Show
Keyboard" dialog with values that change as the simulation proceeds.
(Nobody gets to see the first try.) This is the first step toward
making something resembling a wxWindows debugger.
First, variables which are going to be visible in the CI must be
registered as parameters. For some variables, it might be acceptable
to change them from Bit32u into bx_param_num_c and access them only
with set/get methods, but for most variables it would be a horrible
pain and wreck performance.
To deal with this, I introduced the concept of a shadow parameter. A
normal parameter has its value stored inside the struct, but a shadow
parameter has only a pointer to the value. Shadow params allow you to
treat any variable as if it was a parameter, without having to change
its type and access it using get/set methods. Of course, a shadow
param's value is controlled by someone else, so it can change at any
time.
To demonstrate and test the registration of shadow parameters, I
added code in cpu/init.cc to register a few CPU registers and
code in iodev/keyboard.cc to register a few keyboard state values.
Now these parameters are visible in the Debug:Show CPU and
Debug:Show Keyboard dialog boxes.
The Debug:Show* dialog boxes are created by the ParamDialog class,
which already understands how to display each type of parameter,
including the new shadow parameters (because they are just a subclass
of a normal parameter class). I have added a ParamDialog::Refresh()
method, which rereads the value from every parameter that it is
displaying and changes the displayed value. At the moment, in the
Debug:Show CPU dialog, changing the values has no effect. However
this is trivial to add when it's time (just call CommitChanges!). It
wouldn't really make sense to change the values unless you have paused
the simulation, for example when single stepping with the debugger.
The Refresh() method must be called periodically or else the dialog
will show the initial values forever. At the moment, Refresh() is
called when the simulator sends an async event called
BX_ASYNC_EVT_REFRESH, created by a call to SIM->refresh_ci ().
Details:
- implement shadow parameter class for Bit32s, called bx_shadow_num_c.
implement shadow parameter class for Boolean, called bx_shadow_bool_c.
more to follow (I need one for every type!)
- now the simulator thread can request that the config interface refresh
its display. For now, the refresh event causes the CI to check every
parameter it is watching and change the display value. Later, it may
be worth the trouble to keep track of which parameters have actually
changed. Code in the simulator thread calls SIM->refresh_ci(), which
creates an async event called BX_ASYNC_EVT_REFRESH and sends it to
the config interface. When it arrives in the wxWindows gui thread,
it calls RefreshDialogs(), which calls the Refresh() method on any
dialogs that might need it.
- in the debugger, SIM->refresh_ci() is called before every prompt
is printed. Otherwise, the refresh would wait until the next
SIM->periodic(), which might be thousands of cycles. This way,
when you're single stepping, the dialogs update with every step.
- To improve performance, the CI has a flag (MyFrame::WantRefresh())
which tells whether it has any need for refresh events. If no
dialogs are showing that need refresh events, then no event is sent
between threads.
- add a few defaults to the param classes that affect the settings of
newly created parameters. When declaring a lot of params with
similar settings it's more compact to set the default for new params
rather than to change each one separately. default_text_format is
the printf format string for displaying numbers. default_base is
the default base for displaying numbers (0, 16, 2, etc.)
- I added to ParamDialog to make it able to display modeless dialog
boxes such as "Debug:Show CPU". The new Refresh() method queries
all the parameters for their current value and changes the value in
the wxWindows control. The ParamDialog class still needs a little
work; for example, if it's modal it should have Cancel/Ok buttons,
but if it's going to be modeless it should maybe have Apply (commit
any changes) and Close.
- bx_gen_reg cannot be declared with BX_SMF or it can't read gen_reg
when static member functions are turned on.
- use "BX_CPU_C_PREFIX" instead of "BX_CPU_C::" for get_segment_base.
- the SMF (static member function) tricks are just plain wierd. The only way to
really be sure that you're not breaking something is to try compiling it with
SMF on and with SMF off. e.g. "configure && make" and
"configure --enable-processors=2 && make".
work (control-C kills process instead of returning to debugger prompt), give
a configure-time error if they are enabled together. If we can fix the
signal problem in readline, this check can be removed.
problems with control-C handling if you enable readline, because readline()
installs its own signal handlers every time you call it. I'm having
good luck with "--with-wx --enable-debugger --disable-readline" now.
X windows, wxWindows. Each platform has its own way of returning
a variable length string, and its own rules about how you're supposed
to dispose of the string. Now all platforms do the same thing: they
allocate a Bit8u buffer with C++ "new" and copy the clipboard data in,
then release the clipboard data in the platform-specific correct way.
The Bit8u buffer is sent to the keyboard code, which frees it with
delete [] when finished.
- modified: gui/wxmain.cc gui/wxmain.h
X windows, wxWindows. Each platform has its own way of returning
a variable length string, and its own rules about how you're supposed
to dispose of the string. Now all platforms do the same thing: they
allocate a Bit8u buffer with C++ "new" and copy the clipboard data in,
then release the clipboard data in the platform-specific correct way.
The Bit8u buffer is sent to the keyboard code, which frees it with
delete [] when finished.
- modified: gui/wx.cc gui/x.cc gui/win32.cc iodev/keyboard.cc
files that need them. This is more in line with the other gui libraries,
and the compile line is easier to read.
- modified: Makefile.in configure.in configure gui/Makefile.in
delivered to both the GUI and simulator thread, so they both call
bx_signal_handler. This can lead to deadlock as multiple threads enter
BX_PANIC and try to show a dialog box at once. To solve the problem, I made
a function isSimThread() which can be called from anywhere. If the
bx_signal_handler is called from any thread OTHER THAN the simulation thread,
it returns without doing anything. As a result, only one thread is allowed
to enter the signal handler code, and now control-C works correctly.
Bochs to immediately read the bochsrc and start simulating immediately (as
opposed to going into the configuration interface first). Now -q does
the right thing in the wxWindows interface. It behaves as if you selected
Read Configuration and then Simulate:Start.
- modified: main.cc gui/siminterface.cc gui/siminterface.h gui/wxmain.cc
direct reads/writes from native variables to the x86 (guest)
memory image. Look at the end of bochs.h. Don't know if that's
the right place to put them, but here you can extend these
macros to platform-specific asm() code if you like, or just
use the generic C code I supplied. Some platforms have special
instructions for byte-order swapping etc. Also, you can't
make any assumptions about the alignment of the pointers
passed.
mode uses the notion of the guest-to-host TLB. This has the
benefit of allowing more uniform and streamlined acceleration
code in access.cc which does not have to check if CR0.PG
is set, eliminating a few instructions per guest access.
Shaved just a little off execution time, as expected.
Also, access_linear now breaks accesses which span two pages,
into two calls the the physical memory routines, when paging
is off, just like it always has for paging on. Besides
being more uniform, this allows the physical memory access
routines to known the complete data item is contained
within a single physical page, and stop reapplying the
A20ADDR() macro to pointers as it increments them.
Perhaps things can be optimized a little more now there too...
I renamed the routines to {read,write}PhysicalPage() as
a reminder that these routines now operate on data
solely within one page.
I also added a little code so that the paging module is
notified when the A20 line is tweaked, so it can dump
whatever mappings it wants to.
I have not tested these functions, but they model the format and
acceleration principals of the byte/word/dword functions. Give them
a try on both little/big endian machines.
to diff configure...you'll have to run autoconf yourself.
- in config.h.in set BX_SUPPORT_MMX to 0, not 1. The configure script
will replace it with a 1 if appropriate. That's the way all other
options are done.
- you need to use patch -p1 for this
wxHAS_RAW_KEY_CODES is not available in the wxWindows library.
my patch "patch.wx-raw-keycodes" adds wxHAS_RAW_KEY_CODES to the wxWindows
library, and it will also be in wxWindows 2.3.3 and beyond.
correct name for floppy and cdrom devices:on windows, A:, B:, etc;
on Linux /dev/fd0 and /dev/cdrom.
- It's perfectly ok to type device names into the blank on those dialog
boxes, but the label "Disk Image File:" sort of implies that it has to
be a file. To try to avoid confusion change the label to simply
"Disk Image:".
on win32. I believe this is the same problem that scarlip referred to as
"it doesn't start reliably. sometimes it works, sometimes it won't".
See comments in gui/wx.cc (dimension_update) for details.
- since dimension_update is called from the simulator thread, it needs to
get the GUI mutex before calling any wxWindows functions. Now it does.
- add lots of IFDBG_VGA(...) lines which I use to diagnose various problems.
They are compiled away by default (for performance). See definition of
IFDBG_VGA() in gui/wxmain.h.
values. All wxWindows dialogs return wxID_OK or wxID_CANCEL. The
wxOK and wxCANCEL symbols are ONLY used in input arguments that determine
whether to display the ok and cancel buttons. Now I'm doing the same.
Return values are wxID_OK if they pressed the ok button, and wxID_CANCEL
if they pressed cancel.
so that a compare of the current access could be done more
efficiently against the cached values, both in the normal
paging routines, and in the accelerated code in access.cc.
This cut down the amount of code path needed to get to
direct use of a host address nicely, and speed definitely
got a boost as a result, especially if you use the
--enable-guest2host-tlb option.
The CR0.WP flag was a real pain, because it imparts
a complication on the way protections work. Fortunately
it's not a high-change flag, so I just base the new
cached info on the current CR0.WP value, and dump
the TLB cache when it changes.
an allocation scheme that is guaranteed to return a block that is
aligned correctly.
- Kevin asked me to go ahead and align the memory to 4k page boundaries,
so I did. If we need to change this, just change BX_MEM_VECTOR_ALIGN
in memory/memory.h (now 4096).
checks were honoring the EFLAGS.DF bit, but assuming it was always
equal to 0 (increment upward). Plus some general cleanup of the
acceleration code.
I left the default of '--enable-repeat-speedups' to disabled, but
it seems pretty solid. Definitely adds performance for disk
heavy workloads.
SetToolBitmapSize() to set the icon size to 16x16; when I changed the icon
size I forgot to change SetToolBitmapSize() and somehow it looked ok on
wxGTK.
- change mouse tooltip to "(Mouse Not Implemented Yet!)" for now
has a 16bit signed value. If you try to set the max above 32767, it
overflows and does stupid things. To combat this tendency, I now use
the SPINCTRL_FIX_MAX(x) macro when setting the max range of a spinctrl.
On platforms that need it, this will saturate the range at 32767.
think i is still defined the second time.
- MSVC++: can't use a variable to define another variable's array bounds.
Now I use a #define for the array bounds instead.
- implement the Edit Keyboard dialog using ParamDialog instead of the
handcoded thing.
- make Serial/Parallel dialog look a little better
- change order of "other" dialog to get ips and vga_update_interval on top
ParamDialog. When a boolean param changes, I read its dependent_list
field to see which other parameters depend on it. Then, for any
dependents that are actually showing in the dialog, I set their
enable bit accordingly. This required addition of another hash table,
called paramHash. The two EnableChanged() methods implement this.
- remove all ConfigKeyboardDialog code because I can do just as well
using the generic ParamDialog.
- fix bug that caused occasional crashes. To attempt to find all the
choices in an a wxChoice control, I was calling GetClientData() on
increasing index until it returned NULL. The docs implied that this
was safe, but it's not. Eventually I found an apparantly undocumented
call wxChoice::GetCount() that gives the number of strings in the
choice box and it allows me to do the right thing.
to change the enable/disable status of other parameters worked fine for
the text mode interface but poorly for the wxWindows gui. So I
implemented it a different way. Now in every boolean parameter, there is
a field called dependent_list which is a list of parameters which
are enabled/disabled by that boolean. Having this list available
allows both the text mode CI and the wxWindows CI to know which fields
should be enabled and disabled as a result of a boolean changing value.
- when the set() method of a bool param is called, or when the
dependent_list is changed, a private method called update_dependents()
changes the enabled status of all dependent parameters.
- add macros to get parameter ids of serial and parallel port parameters,
using the port number as an input variable.
to change the enable/disable status of other parameters worked fine for
the text mode interface but poorly for the wxWindows gui. So I
implemented it a different way. Now in every boolean parameter, there is
a field called dependent_list which is a list of parameters which
are enabled/disabled by that boolean. Having this list available
allows both the text mode CI and the wxWindows CI to know which fields
should be enabled and disabled as a result of a boolean changing value.
- when the set() method of a bool param is called, or when the
dependent_list is changed, a private method called update_dependents()
changes the enabled status of all dependent parameters.
to change the enable/disable status of other parameters worked fine for
the text mode interface but poorly for the wxWindows gui. So I
implemented it a different way. Now in every boolean parameter, there is
a field called dependent_list which is a list of parameters which
are enabled/disabled by that boolean. Having this list available
allows both the text mode CI and the wxWindows CI to know which fields
should be enabled and disabled as a result of a boolean changing value.
- I've made this change in many of the parameters, in the init code of
main.cc. When I add a dependent_list, I no longer need the "handler"
so I remove the call to set_handler and the cases in the handler
functions.
- in the process, I also made the serial and parallel port init code
into loops, instead of hardcoded initialization. Now if you change
the number of serial/parallel ports in bochs.h the correct number of
ports will be initialized and the menus will grow/shrink accordingly.
- fixed up a few names to improve the look of ParamDialog generated
dialogs.
- define preproc macros for BX_N_SERIAL_PORTS and BX_N_PARALLEL_PORTS
so that if you want to change the number, you only have to change it
in one place.
to get default values, but I didn't initialize bx_options until
bx_init_options(). I still think that removing the initializer
was the right choice, so I made a macro in bochs.h called
DEFAULT_LOG_ACTIONS(level) that supplies the defaults instead.
a method to add the parameters (bx_param_c) that you want to edit,
and display it. It knows how to display and edit boolean, int,
enum, and string, so it can do a reasonable job on any parameter.
The end result is not as nice as a box that you lay out by hand, but
it's decent. The most obvious thing that's missing from
ParamDialog-generated dialogs is that I haven't found a way to
make an "Enable" button that enables/disables a bunch of other
parameters. I'll keep thinking about that.
- using ParamDialog, I made dialogs for Sound, Cmos, Serial/Parallel,
32bitOSloader, and an ugly catch-all category called other.
Now I believe you can edit every single option using wxWindows.
access routines in access.cc, completing the upgrade of
those routines. You do need '--enable-guest2host-tlb', before
you get the speedups for now. The guest2host mods seem pretty
solid, though I do need to see what effects the A20 line has
on this cache and the paging TLB in general.
- remove the format string from GetTextCtrlInt() because the strtoul
conversion is better than the sscanf with a format string (it supports
both base 10 and 16 with 0xFF notation).
- modified files: gui/wxdialog.cc gui/wxdialog.h gui/wxmain.cc gui/wxmain.h
- also other browse buttons were somewhat broken in that they didn't
set the initial value of the wxFileDialog. Now all text fields
with a browse button use a single function BrowseTextCtrl() to
avoid future problems of this sort.
- if the Ok on the MemoryConfigDialog is rejected because the integers
can't be parsed, now give a more specific error message that points you
to which field has the illegal value.
- print hex numbers with CAPS. With proportional font this is much
easier to read.
- accept either strings with base 10 or 16 numbers in GetTextCtrlInt by
default. If the sscanf fails, accept anything that strtoul can
read. Unfortunately legitimate "-1"'s being returned from strtoul will
be rejected, but at present there is no need for negative numbers in
textfields anywhere.
- modified files: gui/wxdialog.cc gui/wxdialog.h
and also the optional rom settings. I think it all works except that
the Browse buttons aren't hooked up yet.
- modified Files: gui/wxdialog.cc gui/wxdialog.h gui/wxmain.cc gui/wxmain.h
added --enable-repeat-speedups with default to disabled.
Reconfigure/recompile and the speedup code will be #ifdef'd
out for now. It manifested as junk written to the VGA screen
while booting/running Windows.
Also made some more mods to the main cpu loop. Moved the
handling of EXT/errorno outside the main loop, much like
the extra EIP/ESP commits were moved, for a little better
performance.
I changed the fetch_ptr/bytesleft method of fetching to
a slightly different model, which calculates a window
for which EIP will be valid (land on the current page),
and a bias which when applied to EIP will be from
0..upper_page_limit. Speed is about the same for either
method, but a pseudo-op/threaded-interpreter will plug
in better with this and be faster.
die, or ask the user for each type of event. It has a button that
will lead to the "advanced" dialog, which doesn't exist yet.
- in gui/wxdialog.h, sketch a few more dialogs to be done soon
- modified: gui/wxdialog.cc gui/wxdialog.h gui/wxmain.cc gui/wxmain.h
class's prefix, NE2K. The real issue is that the ne2k class exists at
configuration time, so it is possible to tell it how to respond to
panics, errors, etc. The packet mover is created after configuration
depending on the setting of bx_options.ne2k.Oethmod, so I cannot
(with major hacks) affect its settings from the configuration interface.
Several packet movers were already set up this way anyway.
- Paging code rehash. You must now use --enable-4meg-pages to
use 4Meg pages, with the default of disabled, since we don't well
support 4Meg pages yet. Paging table walks model a real CPU
more closely now, and I fixed some bugs in the old logic.
- Segment check redundancy elimination. After a segment is loaded,
reads and writes are marked when a segment type check succeeds, and
they are skipped thereafter, when possible.
- Repeated IO and memory string copy acceleration. Only some variants
of instructions are available on all platforms, word and dword
variants only on x86 for the moment due to alignment and endian issues.
This is compiled in currently with no option - I should add a configure
option.
- Added a guest linear address to host TLB. Actually, I just stick
the host address (mem.vector[addr] address) in the upper 29 bits
of the field 'combined_access' since they are unused. Convenient
for now. I'm only storing page frame addresses. This was the
simplest for of such a TLB. We can likely enhance this. Also,
I only accelerated the normal read/write routines in access.cc.
Could also modify the read-modify-write versions too. You must
use --enable-guest2host-tlb, to try this out. Currently speeds
up Win95 boot time by about 3.5% for me. More ground to cover...
- Minor mods to CPUI/MOV_CdRd for CMOV.
- Integrated enhancements from Volker to getHostMemAddr() for PCI
being enabled.
- for all modal dialogs that return a boolean result, return either
wxOK or wxCANCEL instead of 0,-1.
- you can view the NetConfigDialog box if you choose the Edit:Network menu
item, but it's not connected to the actual parameter values yet.
certain number of instructions. I use it for performance testing, and it
won't hurt anyone unless they are foolish enough to enable it in config.h.
Of course it is disabled by default!
into normal C strings. After asking about it on wx-users, I understand
it better now.
Example of unsafe code:
char *filename = dlg.GetFilename().c_str ();
printf ("file name is %s\n", filename);
The problem is that dlg.GetFilename() returns a temporary wxString
that goes out of scope at the end of that line of code. The "filename"
string is unstable if you write it this way.
Example of safe code:
char filename[1024];
wxString fn (dlg.GetFilename ());
strncpy (filename, fn.c_str (), sizeof(filename));
printf ("file name is %s\n", name);
Now we have a stable copy of the wxString in "fn" which is usable
as long as fn is in scope.
- also now we use wxStrings (almost) all the time in the interface to the
wxdialogs. Any conversion from char* to wxString and back is done in
wxmain.cc now.
for BX_CPU_LEVEL >= 6, and to have the CMOV instructions generate
an undefined opcode exception after printing info that they were
called, if BX_CPU_LEVEL <= 5. I suppose we could have a separate
configure option, but mirroring Intel, CMOV is available as of
Pentium Pro.
For now, you have to compile with --enable-cpu-level=6 for CMOV
support to be compiled in.
of bochs' broken paging code, and made an option to compile in
support of 4Meg pages, with the default being disabled, because
it is not well supported yet.
- HDConfigDialog now uses an EnableChanged() method to set the enabled bit
on components controlled by the enable checkbox.
- now sets the present bit on hard disks and cdrom
- enforces the rule that you can't have DISKD and CDROMD (just in time for
Christophe to add another interface)
- now the megabytes field is a wxStaticText, which makes it clear that
it cannot be edited.
- add "enter size/compute geometry" button for HD image
- make a few more strings into #defines in wxdialog.h
- disable most of the Edit menu during simulation, reenable it when
simulation stops
- mention what version of wxWindows to use
- correct VC++ build instructions (I haven't tested in a while but it was
obviously wrong)
- update "what works right now" and clean up to do list
choose the filename and capacity of a floppy image. This dialog
can recognize a list of names as physical disk drives, and it has a
Browse button so that you can click on a new image intead of having
to type it. If you press ok, then the Bochs parameters are updated.
- eventually we should make a function that makes a list of the
physical devices that should be mentioned here. For Windows it should
say "Physical drive A:" for "a:", while on Linux it should say
"Physical drive fd0" for "/dev/fd0" or something. Even if bochs
doesn't find the correct physical disk drives, you can still type
whatever file name you want.
gui/wxdialog.h and gui/wxdialog.cc. The first dialog box is
called LogMsgAskDialog. It displays panic messages and asks if you
want to continue, quit, etc.
Some devices already had one. Some I had to add an empty one.
I did a little cleaning of init() methods to make them more uniform
but generally I left them alone.
- I also put these exact diffs into a patch "patch.iodev-add-reset"
in case I want to revert these changes for some reason, for example
if they break an old patch. It should be deleted after a while.
I use setjmp() to save the context just before calling
bx_continue_after_config_interface(). Then, in
bx_real_sim_c:quit_sim, I use longjmp() to jump back to that context.
This happens in main.cc and in gui/wxmain.cc (wxWindows only).
I haven't tested with the debugger yet. Possibly with debugger
the quit longjmp() should jump back to the debugger prompt loop
instead of actually quitting the program.
- clean up BX_ASYNC_EVT_LOG_MSG implementation by creating a different,
synchronous event called BX_SYNC_EVT_LOG_ASK. The async event
could be used to simply tell the CI that an event has occurred,
for example if the user wanted to view the events on screen
(not implemented). The sync event is used when you want the user
to respond before the simulation can continue, such as a for the
"panic=ask" behavior.
- in wxmain.cc, move the updates to the Start,Stop,Pause,Resume menu
items into a separate method simStatusChanged(). This makes the code that
does important stuff more readable.
- remove wxMutexGuiEnter()/Leave() from MyFrame::OnSim2CuiEvent().
This method is an event handler called in the gui thread, so it
already has the gui lock. This call caused thread lock on my linux
box.
again. This means that the simulation needs to stop in a consistent state,
including the "reentry check" variables in logfunctions::fatal() and
logfunctions::ask().
- fatal() is supposed to quit the simulation. add a clear panic message if it
doesn't quit, but remove the reentry check. The reentry check was causing
problems when you stop and start the simulation again.
- in ask(), keep the reentry check but set in_ask_already=0 before
calling fatal() so that ask() works if we start the simulation again.
and complain if fatal() fails to die.
bx_do_text_config_interface() to make it clear that it's not used
with wxWindows. Before, it was around only the line of that function that
failed to compile.
the terminology a bit. In particular, the term "gui" has started
to mean different things in different contexts, so I've defined
some more specific names for the parts of the user interface, and
updated comments and some variable names to reflect it. See
siminterface.h for a more complete description of all of these.
VGAW: VGA display window and toolbar buttons, the traditional Bochs
display which is ported to X, win32, MacOS X, etc. Implemented
in gui/gui.* and platform dependent gui/*.cc files.
CI: configuration interface that lets the user change settings such
as floppy disk image, ne2k settings, log options. The CI consists
of two parts: configuration user interface (CUI) which does the
actual rendering to the screen and handles key/mouse/menu events,
and the siminterface object.
CUI: configuration user interface. This handles the user interactions
that allow the user to configure Bochs. To actually change any
values it talks to the siminterface object. One implementation of
the CUI is the text-mode menus in gui/control.cc. Another
implementation is (will be) the wxWindows menus and dialogs in
gui/wxmain.cc.
siminterface: the glue between the CUI and the simulation code,
accessible throughout the code by the global variable
bx_simulator_interface_c *SIM;
Among other things, siminterface methods allow the simulator to ask the
CUI to display things or ask for user input, and allows the CUI
to query and modify variables in the simulation code.
GUI: Literally, "graphical user interface". Until the configuration menus
and wxWindows came along, everyone understood that "gui" referred to the
VGA display window and the toolbar buttons because that's all there
was. Now that we have the wxWindows code, which implements both the VGAW
and the CUI, while all other platforms implement only the VGAW, it's not
so clear. So, I'm trying to use VGAW, CI, and CUI consistently since
they are more specific.
control panel: This has been used as another name for the configuration
interface. "control panel" is also somewhat unspecific and it sounds
like it would be graphical with buttons and sliders, but our text-mode
thing is not graphical at all. I've replaced "control panel" with
"configuration interface" wherever I could find it. In configure script,
the --disable-control-panel option is still supported, but it politely
suggests that you use --disable-config-interface instead.
- clean up comments in siminterface,wx* code
- add comments and examples for bx_param_* and BxEvents
- remove some obsolete stuff: notify_*_args,
bx_simulator_interface_c::[sg]et_enabled() methods
- in siminterface.cc, move a few bx_real_sim_c methods to where they belong,
with the rest of the methods. No changes to the actual methods.
- remove some DOS ^M's which crept in and confused my editor.
mirrored the use of enable_control_panel exactly. This should not cause
any change in behavior, and it lets me eliminate these methods which
don't make much sense anymore.
- loading default bochsrc for the wx gui no longer necessary
- the wx gui version of bochs now accepts the same command line arguments as
the other guis
to "*_ENABLED"
- bx_serial_options for all 4 ports moved into an array com[4]
- serial port com1 is enabled by default
- detection of com2, com3 and com4 config options disabled for now
- new parameter "enabled" added to the serial bochsrc options
- error handling for serial and parallel bochsrc options changed. The unhandled
BX_PANICs are replaced by BX_ERRORs.
- new function bx_write_serial_options() added
- serial destructor restores original terminal settings only when serial port
is enabled and the tty_id is valid
parport1 with the new option "enabled". The old option "enable" only
controlled the output. The parport1 is enabled with no output by default.
Changes:
* bochrc option "enable" replaced by "enabled"
* parport option "Oenable" replaced by "Opresent"
* bx_parport_options par1 and par2 replaced by an array par[2]
* initialize parport1 resources only when enabled
* renamed variable "parport_init_list" to "par_ser_init_list" since it
contains parport and serial options
* documentation and bochsrc updates
- the parport variables "output" and "initmode" now belong to the bx_par_t
structure
- TODO: add parport2 (disabled by default), parport detection in the bios
installation dependent values in a global configuration file. If you are
including such a file, you only need to define the disk images and other
guest OS dependent stuff.
- new command line option '-q' (quickstart) added (the same as '-nocp')
- new command line option '-qf' (quickstart + config file) added (the same as
'-nocp -f')
- missing initialization of Ouser_shortcut in bx_options added
- PCI configuration space of the host bridge renamed from array[] to pci_conf[]
- new functions load_ROM() and mem_read() for ROM access
- macros for PCI functions defined in bochs.h
(from plex86 curses.cc)
- set the log action for the log level "panic" to "fatal", because the "ask"
menu causes trouble in the terminal
- logfile output to stderr not allowed
- handle_events(): type of variable 'character' must be 'int'
- two terminal chars added in function get_term_char()
- bit 7 of the vga attribute enables the A_REVERSE flag of the terminal char
(from plex86 curses.cc)
- variable term_attr no longer necessary in function text_update()
- function keys are working now
- clear_screen() function works now
- a few special vga characters converted to terminal characters
- exit() now clears the screen and calls endwin()
- "[TERM]" removed from info/error messages
- debug messages changed to BX_DEBUG
bitmaps. The bochs window now consists of 3 windows: the main window and
it's child windows simulation window and toolbar window.
Changes:
- new windows "mainWnd" and "simWnd" replace the old "hwnd"
- moved the functions of the old window procedure to the new ones
- toolbar functions added in create_bitmap(), headerbar_bitmap() and
replace_bitmap()
- function show_headerbar() no longer needed (must be present for
compatibility)
- a few variables for the headerbar changed or removed
- bitmap and headerbar variables now initialized in specific_init()
- added atapi layer
- updated int13_cdrom, int13_eltorito and int13_cdemu
- added verious DEBUG_XXX to debug only parts of the bios, because we're running low on data space in debug mode
- added a fix so bcc generates good code when #asm follows if or while statements
- updated int13_cdrom, int13_eltorito and int13_cdemu
- added verious DEBUG_XXX to debug only parts of the bios, because we're running low on data space in debug mode
- added a fix so bcc generates good code when #asm follows if or while statements
the guest OS. The shortcut can be defined in the bochsrc or in the config
interface. It is possible to change it at runtime.
These shortcuts are currently recognized:
ctrlaltdel, ctrlaltesc, ctrlaltf1, alttab
Here is the list of changes:
* userbutton.h and userbutton.xpm added in gui/bitmaps
* config options for the userbutton shortcut added
* initialize the new button in the gui.cc
* the new userbutton handler generates keypresses and relaeses depending on
the shortcut keyword
* the gui stops adding buttons to the headerbar if not enough space is left.
This can happen when the screen width is 320 pixels (done for X11 only).
* TODO: build a dialog box for the wxWindows gui
- 4 ata interfaces support (1)
- devices auto-detection
- 16bits/32bits device access
- EDD3.0 support
This is nearly the same BIOS I offered for download on July 12th,
but I hope to get more feedback with the CVS.
I will update this bios with the atapi bit and fixes, and
I'll eventually merge the changes in the main BIOS.
Added Files:
BIOS-bochs-new-ata rombios-new-ata.c
more work in the floppy and bios code.
- floppy and cdrom entries in the runtime config menu can be disabled if the
drive wasn't defined in bochsrc or start menu
- floppy variable "initial_status" and cdrom variable "inserted" renamed to
"status"
- unused variable *ips in function build_runtime_options_prompt() disabled
as no symbol. Now they will be relative to the last symbol.
- when anything was looked up in a segment with a nonzero base address,
it would print "non-zero base" and abort the lookup. I disabled this
behavior so that it would look up the symbol based on the EIP despite
the base. This change makes it possible to trace user processes, in
which the base is 0xc0000000.
- symbol lookup also used to fail in 16-bit code. Since the address
translations rules for 16-bit code are simple enough, I just compute
the 20-bit linear address and look up the symbol with it. Now I
can load a symbol table of the ROMBIOS and it works.
* new floppy type 360k can be used in .bochsrc and the config interface
* media type and geometry can be set for the floppy type
* BIOS changes to make 360k floppy drives work
* bximage can create 360k images now
Port 0x8901 is used. Two time values can be set and
read, along with the difference of the two.
Please look in the patch file for instructions on usage.
and works okay with one rom track only. We still have to implement reading
the real TOC on win32.
- in function GetCDCapacity(): type of variable 'buf[8]' must be 'unsigned char'
- in function capacity(): win32 version returned the number of bytes, but it
should return the number of blocks (ASPI blocksize is 2352)
- description of the function capacity() fixed (it always returns blocks)
controller returns an error code until we are able to implement this feature.
- init_send_atapi_command(): don't panic if alloc_length is 0, use byte_count
to set alloc_length instead
- fixed a BX_PANIC message in the io write handler for port 0x1f0
- init(): set the initial status to BX_EJECTED if evaluate_media() fails
- don't modify the DOR when a drive > 1 is selected
- floppy command 'get status' now recognizes the head field
- floppy command 'recalibrate': don't set cylinder to 0 before completion
- floppy command 'sense interupt status' does not clear status register 0
- floppy command 'configure': more detailed BX_DEBUG messages
- floppy command 'read ID' does not modify status register 0
- floppy read/write commands: set the error bit in status register 0 if media
is not present
- better detection of not existing drives in some commands: check the media type
of the selected drive instead of the drive select value
- behaviour of floppy commands 'recalibrate' and 'seek' changed:
* drive is busy in the execution phase, but not the controller
* replaced the panic by setting the error status if drive is not existing
- evaluate_media(): set the media type even if device/file is not present
'-nocp' option
- reverted latest changes in function bx_do_text_config_interface()
- removed unnecessary forward declaration of function bx_print_header()
- replace the loglevel ACT_ASK by ACT_FATAL only when compiled without control
panel
- detection of the config file fixed - fopen returns NULL if the function fails
references in the other manpages are updated.
- the version placeholder is now written in lowercase. This prevents the
modification of the sed argument by 'configure'
- install/uninstall commands for the manpages in Makefile.in modified to make
the changes obove work.
- header and footer of the manpages fixed
- pathnames of installed files updated (FHS compatibility)
- "parport1" section in the bochsrc manpage added
- new option "cdrom" in the "boot" section of the bochsrc manpage added
to describe the format of the log prefix. This option can be any string
with special tokens being replaced at run time :
# %t : 11 decimal digits timer tick
# %i : 8 hexadecimal digits of cpu0 current eip
# %e : 1 character event type ('i'nfo, 'd'ebug, 'p'anic, 'e'rror)
# %d : 5 characters string of the device, between brackets
the default is "%t%i%d", so the logprefix is the same as before.
New tokens can be easily added or changed if needed.
Modified Files:
.bochsrc bochs.h logio.cc main.cc gui/control.cc
gui/siminterface.h gui/siminterface.cc
patches/patch.logfilefmteip
see patch [ 551811 ]
Location of some files on Bochs installation breaks the
Filesystem Hierrachy Standard, to be found at:
http://www.pathname.com/fhs/
It is important to comply with FHS because most
distributions require it in order to accept packages.
in a multiprocessor simulation. Imagine that! Without the patch, there is
just one FPU for all the processors, which is clearly wrong.
See bug [ 461762 ] multiple processors but only one FPU
- new real mode PCI BIOS functions: find device, read/write byte/dword
- C code for PCI BIOS handles errors and prints messages only
- function setPCIaddr() no longer needed
- functions inw() and outw() no longer used by the PCI BIOS
- BIOS32 checksum calculation rewriten to prevent errors
- labels of protected mode PCI BIOS renamed
DMA functions defined. Most of the changes are based on the "bochs sync"
version of plex86. Here is the list of changes:
* register/unregister functions for DMA channels added. The DMA controller
can use the DMA read/write handlers of registered devices directly.
* "hardwired" code in dma.cc removed
* all DMA related code in devices.cc and iodev.h removed
* DMA related code in pc_system.* removed except HRQ handling
* macros for DMA functions defined in bochs.h
* floppy and SB16 code modified to use the changes described above
Linux (kernel 2.2.18) is able to use the new features.
Here is the list of changes:
* BIOS32 data structure added
* BIOS32 and protected mode PCI BIOS functions added. The BIOS32 function
returns a pointer to the PCI BIOS entry point when the service $PCI is
requested and the PCI hardware is present.
* Supported 32 bit functions: installation check, find pci device,
read configuration byte/word/dword, write configuration byte/word/dword
* real mode PCI BIOS installation check rewritten in assembler to use 32 bit
registers for the protected mode entry point and the 'PCI ' signature.
TODO:
* add missing functions of the PCI BIOS (if necessary)
* add missing features of the i440FX PCI bridge
* implement the other parts of the i440FX chipset (PCI-to-ISA bridge,
PCI IDE controller, USB controller)
Specific changes from the patch:
1.) renamed fdcache_eip to fdcache_ip, as it is using
the RIP instead of the EIP.
2.) added a Boolean array fdcache_is32 which uses is32
to determine icache hits. Otherwise we could run 32-bit
code as 16-bit or vice versa.
Modified Files:
config.h.in cpu/cpu.cc cpu/cpu.h memory/memory.cc
The new function register_pci_handlers() is similar to the register functions
for i/o addresses. A PCI device can register the read/write handlers for it's
private PCI configuration space. The i/o mapped registers of the host bridge
control the access to the configuration registers of each PCI device. You can
select the bus, device, function and register address with the confAddr
register. The confData register is a window to the configuration space of the
selected device.
- reset sets the values of the i/o mapped registers to 0
- changed some BX_INFO messages to BX_DEBUG
This means that the REALTIME_PIT now only works on machines
that are capable of sustaining 150000 IPS, in aggregate. This
seems a reasonable requirement, as even my 200Mhz PPC with 16MB
of memory can sustain that.
This is now probably ready for primetime, so I need to get it
added to the configure options.
