smarter. If you use --enable-x86-64, it has the following side
effects on other options:
- cpu level defaults to 6 instead of 5
- ignore bad msr defaults to on (Peter T. requested this)
- if cpu level is 6 or greater, these options are enabled by default.
- 4meg pages (PSE)
- physical address extensions (PAE)
- global pages (PGE)
- apic support
configuring for a different machine. This is used to short-circuit
certain sanity checks, such as existence of certain required libraries.
- in --with-wx configuration, when $cross_configure=1, do not abort
configure if library is not found.
- if wxWindows version not found, print "not_found" instead of nothing
From his patch file text:
> This patch adds Promise DC2300 VLB IDE Support.
> You may find msdos and win95 drivers on the net. Look for
> P2300W95.ZIP and DC2300VLBIDEver260b.ZIP.
>
> The good news is that now win95 natively sees my cdrom,
> and that the disks are not in msdos compatibility mode any more.
>
> The bad news is that it works only for the first ata interface.
>
> I tested that patch on msdos and win95 only.
>
> Some info on VLB IDE can be found at http://ryston.cz/petr/vlb/
I got Win95 running with 32-bit paging/filesystem using the
recommended driver and these patches. Since the patches did
such a good job bracketing code modifications with a #define,
they might as well become part of the current CVS code.
user can turn on/off use of native host specific inline asm
statements. By default, this option is enabled, so you only
need it to disable inline asms in your compile for now.
Currently only on x86+GCC environments, will inline asm()
statements be used. Eventually, other platforms could specify
some asm()s; probably for endian issues such as byte-swapping
and unaligned memory accesses. On x86, there are some inline
asm()s which do the arithmetic EFLAGS processing so that the
lazy flags handling is somewhat bypassed. Eventually, I'll
add more, at least for the more common instructions. This
adds a little extra performance.
- hardcode BX_HAVE_GETTIMEOFDAY=0 if cross compiling for VC++
(this part hasn't been tested)
- modified files: configure configure.in config.h.in iodev/pit_wrap.cc
but if you hand edit cpu/cpu.h, and change BxICacheEntries,
you can try different sizes. I'll make this more flexible
with configure. For now, use "--enable-icache" with no parameters.
- Modified fetchdecode.cc/fetchdecode64.cc just enough so that
instructions which encode a direct address now use a memory
resolution function which just sticks the immediate address
into rm_addr. With cached instructions we need this.
enhancement to bochs. You can now configure with
--enable-guest2host-tlb.
Force the support of big pages (PSE) when x86-64 is configured.
Reverted back to only one kind of TLB entry style, since everything
is ported.
Fixed one bug in io.cc with as_64 and the index registers.
There are others, as noticed by Peter.
you have AC_DEFINE(var, value) executed more than once, autoconf is
supposed to use the last AC_DEFINE value, but sometimes it doesn't.
I haven't been able to figure out why, so I've just worked around it
instead.
- for BX_SupportGlobalPages, which could call AC_DEFINE twice, I kept the
value in a shell variable $support_global_pages until the end and then
did one AC_DEFINE after it had reached its final value. Same thing
with BX_USE_CONFIG_INTERFACE.
- also I realized that we are using AC_SUBST() in many cases where it is
not needed. AC_SUBST(name) substitutes the string @name@ with a
value from the configure script. For preprocessor symbols like
BX_SupportPAE, we only need the AC_DEFINE; the AC_SUBST has no effect.
be used at all, and Peter didn't want it. "extdb.o" is compiled
into libcpu.a, if configured for it.
Removed a few #warnings for x86-64 compile, based on Peter's
line-item comments regarding the warnings I inserted during
the port/merge.
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.
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.
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/*
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.
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.
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
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.
- 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.
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.
