c8919e6537
Last year, right before I sent xv6 to the printer, I changed the
SETGATE calls so that interrupts would be disabled on entry to
interrupt handlers, and I added the nlock++ / nlock-- in trap()
so that interrupts would stay disabled while the hw handlers
(but not the syscall handler) did their work. I did this because
the kernel was otherwise causing Bochs to triple-fault in SMP
mode, and time was short.
Robert observed yesterday that something was keeping the SMP
preemption user test from working. It turned out that when I
simplified the lapic code I swapped the order of two register
writes that I didn't realize were order dependent. I fixed that
and then since I had everything paged in kept going and tried
to figure out why you can't leave interrupts on during interrupt
handlers. There are a few issues.
First, there must be some way to keep interrupts from "stacking
up" and overflowing the stack. Keeping interrupts off the whole
time solves this problem -- even if the clock tick handler runs
long enough that the next clock tick is waiting when it finishes,
keeping interrupts off means that the handler runs all the way
through the "iret" before the next handler begins. This is not
really a problem unless you are putting too many prints in trap
-- if the OS is doing its job right, the handlers should run
quickly and not stack up.
Second, if xv6 had page faults, then it would be important to
keep interrupts disabled between the start of the interrupt and
the time that cr2 was read, to avoid a scenario like:
p1 page faults [cr2 set to faulting address]
p1 starts executing trapasm.S
clock interrupt, p1 preempted, p2 starts executing
p2 page faults [cr2 set to another faulting address]
p2 starts, finishes fault handler
p1 rescheduled, reads cr2, sees wrong fault address
Alternately p1 could be rescheduled on the other cpu, in which
case it would still see the wrong cr2. That said, I think cr2
is the only interrupt state that isn't pushed onto the interrupt
stack atomically at fault time, and xv6 doesn't care. (This isn't
entirely hypothetical -- I debugged this problem on Plan 9.)
Third, and this is the big one, it is not safe to call cpu()
unless interrupts are disabled. If interrupts are enabled then
there is no guarantee that, between the time cpu() looks up the
cpu id and the time that it the result gets used, the process
has not been rescheduled to the other cpu. For example, the
very commonly-used expression curproc[cpu()] (aka the macro cp)
can end up referring to the wrong proc: the code stores the
result of cpu() in %eax, gets rescheduled to the other cpu at
just the wrong instant, and then reads curproc[%eax].
We use curproc[cpu()] to get the current process a LOT. In that
particular case, if we arranged for the current curproc entry
to be addressed by %fs:0 and just use a different %fs on each
CPU, then we could safely get at curproc even with interrupts
disabled, since the read of %fs would be atomic with the read
of %fs:0. Alternately, we could have a curproc() function that
disables interrupts while computing curproc[cpu()]. I've done
that last one.
Even in the current kernel, with interrupts off on entry to trap,
interrupts are enabled inside release if there are no locks held.
Also, the scheduler's idle loop must be interruptible at times
so that the clock and disk interrupts (which might make processes
runnable) can be handled.
In addition to the rampant use of curproc[cpu()], this little
snippet from acquire is wrong on smp:
if(cpus[cpu()].nlock == 0)
cli();
cpus[cpu()].nlock++;
because if interrupts are off then we might call cpu(), get
rescheduled to a different cpu, look at cpus[oldcpu].nlock, and
wrongly decide not to disable interrupts on the new cpu. The
fix is to always call cli(). But this is wrong too:
if(holding(lock))
panic("acquire");
cli();
cpus[cpu()].nlock++;
because holding looks at cpu(). The fix is:
cli();
if(holding(lock))
panic("acquire");
cpus[cpu()].nlock++;
I've done that, and I changed cpu() to complain the first time
it gets called with interrupts disabled. (It gets called too
much to complain every time.)
I added new functions splhi and spllo that are like acquire and
release but without the locking:
void
splhi(void)
{
cli();
cpus[cpu()].nsplhi++;
}
void
spllo(void)
{
if(--cpus[cpu()].nsplhi == 0)
sti();
}
and I've used those to protect other sections of code that refer
to cpu() when interrupts would otherwise be disabled (basically
just curproc and setupsegs). I also use them in acquire/release
and got rid of nlock.
I'm not thrilled with the names, but I think the concept -- a
counted cli/sti -- is sound. Having them also replaces the
nlock++/nlock-- in trap.c and main.c, which is nice.
Final note: it's still not safe to enable interrupts in
the middle of trap() between lapic_eoi and returning
to user space. I don't understand why, but we get a
fault on pop %es because 0x10 is a bad segment
descriptor (!) and then the fault faults trying to go into
a new interrupt because 0x8 is a bad segment descriptor too!
Triple fault. I haven't debugged this yet.
738 lines
33 KiB
Text
Executable file
738 lines
33 KiB
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Executable file
# You may now use double quotes around pathnames, in case
|
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# your pathname includes spaces.
|
|
|
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#=======================================================================
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# CONFIG_INTERFACE
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#
|
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# The configuration interface is a series of menus or dialog boxes that
|
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# allows you to change all the settings that control Bochs's behavior.
|
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# There are two choices of configuration interface: a text mode version
|
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# called "textconfig" and a graphical version called "wx". The text
|
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# mode version uses stdin/stdout and is always compiled in. The graphical
|
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# version is only available when you use "--with-wx" on the configure
|
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# command. If you do not write a config_interface line, Bochs will
|
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# choose a default for you.
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#
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# NOTE: if you use the "wx" configuration interface, you must also use
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# the "wx" display library.
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#=======================================================================
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#config_interface: textconfig
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#config_interface: wx
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|
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#=======================================================================
|
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# DISPLAY_LIBRARY
|
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#
|
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# The display library is the code that displays the Bochs VGA screen. Bochs
|
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# has a selection of about 10 different display library implementations for
|
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# different platforms. If you run configure with multiple --with-* options,
|
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# the display_library command lets you choose which one you want to run with.
|
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# If you do not write a display_library line, Bochs will choose a default for
|
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# you.
|
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#
|
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# The choices are:
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# x use X windows interface, cross platform
|
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# win32 use native win32 libraries
|
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# carbon use Carbon library (for MacOS X)
|
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# beos use native BeOS libraries
|
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# macintosh use MacOS pre-10
|
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# amigaos use native AmigaOS libraries
|
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# sdl use SDL library, cross platform
|
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# svga use SVGALIB library for Linux, allows graphics without X11
|
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# term text only, uses curses/ncurses library, cross platform
|
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# rfb provides an interface to AT&T's VNC viewer, cross platform
|
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# wx use wxWidgets library, cross platform
|
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# nogui no display at all
|
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#
|
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# NOTE: if you use the "wx" configuration interface, you must also use
|
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# the "wx" display library.
|
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#
|
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# Specific options:
|
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# Some display libraries now support specific option to control their
|
|
# behaviour. See the examples below for currently supported options.
|
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#=======================================================================
|
|
#display_library: amigaos
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#display_library: beos
|
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#display_library: carbon
|
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#display_library: macintosh
|
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#display_library: nogui
|
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#display_library: rfb, options="timeout=60" # time to wait for client
|
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#display_library: sdl, options="fullscreen" # startup in fullscreen mode
|
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#display_library: term
|
|
#display_library: win32, options="legacyF12" # use F12 to toggle mouse
|
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#display_library: wx
|
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#display_library: x
|
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|
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#=======================================================================
|
|
# ROMIMAGE:
|
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# The ROM BIOS controls what the PC does when it first powers on.
|
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# Normally, you can use a precompiled BIOS in the source or binary
|
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# distribution called BIOS-bochs-latest. The ROM BIOS is usually loaded
|
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# starting at address 0xf0000, and it is exactly 64k long.
|
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# You can also use the environment variable $BXSHARE to specify the
|
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# location of the BIOS.
|
|
# The usage of external large BIOS images (up to 512k) at memory top is
|
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# now supported, but we still recommend to use the BIOS distributed with
|
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# Bochs. Now the start address can be calculated from image size.
|
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#=======================================================================
|
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romimage: file=$BXSHARE/BIOS-bochs-latest
|
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#romimage: file=mybios.bin, address=0xfff80000 # 512k at memory top
|
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#romimage: file=mybios.bin # calculate start address from image size
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|
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#=======================================================================
|
|
# CPU:
|
|
# This defines cpu-related parameters inside Bochs:
|
|
#
|
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# COUNT:
|
|
# Set the number of processors when Bochs is compiled for SMP emulation.
|
|
# Bochs currently supports up to 8 processors. If Bochs is compiled
|
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# without SMP support, it won't accept values different from 1.
|
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#
|
|
# IPS:
|
|
# Emulated Instructions Per Second. This is the number of IPS that bochs
|
|
# is capable of running on your machine. You can recompile Bochs with
|
|
# --enable-show-ips option enabled, to find your workstation's capability.
|
|
# Measured IPS value will then be logged into your log file or status bar
|
|
# (if supported by the gui).
|
|
#
|
|
# IPS is used to calibrate many time-dependent events within the bochs
|
|
# simulation. For example, changing IPS affects the frequency of VGA
|
|
# updates, the duration of time before a key starts to autorepeat, and
|
|
# the measurement of BogoMips and other benchmarks.
|
|
#
|
|
# Examples:
|
|
# Machine Mips
|
|
# ________________________________________________________________
|
|
# 2.1Ghz Athlon XP with Linux 2.6/g++ 3.4 12 to 15 Mips
|
|
# 1.6Ghz Intel P4 with Win2000/g++ 3.3 5 to 7 Mips
|
|
# 650Mhz Athlon K-7 with Linux 2.4.4/egcs-2.91.66 2 to 2.5 Mips
|
|
# 400Mhz Pentium II with Linux 2.0.36/egcs-1.0.3 1 to 1.8 Mips
|
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#=======================================================================
|
|
cpu: count=2, ips=10000000, quantum=1, reset_on_triple_fault=0
|
|
|
|
#=======================================================================
|
|
# MEGS
|
|
# Set the number of Megabytes of physical memory you want to emulate.
|
|
# The default is 32MB, most OS's won't need more than that.
|
|
# The maximum amount of memory supported is 2048Mb.
|
|
#=======================================================================
|
|
#megs: 256
|
|
#megs: 128
|
|
#megs: 64
|
|
megs: 32
|
|
#megs: 16
|
|
#megs: 8
|
|
|
|
#=======================================================================
|
|
# OPTROMIMAGE[1-4]:
|
|
# You may now load up to 4 optional ROM images. Be sure to use a
|
|
# read-only area, typically between C8000 and EFFFF. These optional
|
|
# ROM images should not overwrite the rombios (located at
|
|
# F0000-FFFFF) and the videobios (located at C0000-C7FFF).
|
|
# Those ROM images will be initialized by the bios if they contain
|
|
# the right signature (0x55AA) and a valid checksum.
|
|
# It can also be a convenient way to upload some arbitrary code/data
|
|
# in the simulation, that can be retrieved by the boot loader
|
|
#=======================================================================
|
|
#optromimage1: file=optionalrom.bin, address=0xd0000
|
|
#optromimage2: file=optionalrom.bin, address=0xd1000
|
|
#optromimage3: file=optionalrom.bin, address=0xd2000
|
|
#optromimage4: file=optionalrom.bin, address=0xd3000
|
|
|
|
#optramimage1: file=/path/file1.img, address=0x0010000
|
|
#optramimage2: file=/path/file2.img, address=0x0020000
|
|
#optramimage3: file=/path/file3.img, address=0x0030000
|
|
#optramimage4: file=/path/file4.img, address=0x0040000
|
|
|
|
#=======================================================================
|
|
# VGAROMIMAGE
|
|
# You now need to load a VGA ROM BIOS into C0000.
|
|
#=======================================================================
|
|
#vgaromimage: file=bios/VGABIOS-elpin-2.40
|
|
vgaromimage: file=$BXSHARE/VGABIOS-lgpl-latest
|
|
#vgaromimage: file=bios/VGABIOS-lgpl-latest-cirrus
|
|
|
|
#=======================================================================
|
|
# VGA:
|
|
# Here you can specify the display extension to be used. With the value
|
|
# 'none' you can use standard VGA with no extension. Other supported
|
|
# values are 'vbe' for Bochs VBE and 'cirrus' for Cirrus SVGA support.
|
|
#=======================================================================
|
|
#vga: extension=cirrus
|
|
#vga: extension=vbe
|
|
vga: extension=none
|
|
|
|
#=======================================================================
|
|
# FLOPPYA:
|
|
# Point this to pathname of floppy image file or device
|
|
# This should be of a bootable floppy(image/device) if you're
|
|
# booting from 'a' (or 'floppy').
|
|
#
|
|
# You can set the initial status of the media to 'ejected' or 'inserted'.
|
|
# floppya: 2_88=path, status=ejected (2.88M 3.5" floppy)
|
|
# floppya: 1_44=path, status=inserted (1.44M 3.5" floppy)
|
|
# floppya: 1_2=path, status=ejected (1.2M 5.25" floppy)
|
|
# floppya: 720k=path, status=inserted (720K 3.5" floppy)
|
|
# floppya: 360k=path, status=inserted (360K 5.25" floppy)
|
|
# floppya: 320k=path, status=inserted (320K 5.25" floppy)
|
|
# floppya: 180k=path, status=inserted (180K 5.25" floppy)
|
|
# floppya: 160k=path, status=inserted (160K 5.25" floppy)
|
|
# floppya: image=path, status=inserted (guess type from image size)
|
|
#
|
|
# The path should be the name of a disk image file. On Unix, you can use a raw
|
|
# device name such as /dev/fd0 on Linux. On win32 platforms, use drive letters
|
|
# such as a: or b: as the path. The parameter 'image' works with image files
|
|
# only. In that case the size must match one of the supported types.
|
|
#=======================================================================
|
|
floppya: 1_44=/dev/fd0, status=inserted
|
|
#floppya: image=../1.44, status=inserted
|
|
#floppya: 1_44=/dev/fd0H1440, status=inserted
|
|
#floppya: 1_2=../1_2, status=inserted
|
|
#floppya: 1_44=a:, status=inserted
|
|
#floppya: 1_44=a.img, status=inserted
|
|
#floppya: 1_44=/dev/rfd0a, status=inserted
|
|
|
|
#=======================================================================
|
|
# FLOPPYB:
|
|
# See FLOPPYA above for syntax
|
|
#=======================================================================
|
|
#floppyb: 1_44=b:, status=inserted
|
|
floppyb: 1_44=b.img, status=inserted
|
|
|
|
#=======================================================================
|
|
# ATA0, ATA1, ATA2, ATA3
|
|
# ATA controller for hard disks and cdroms
|
|
#
|
|
# ata[0-3]: enabled=[0|1], ioaddr1=addr, ioaddr2=addr, irq=number
|
|
#
|
|
# These options enables up to 4 ata channels. For each channel
|
|
# the two base io addresses and the irq must be specified.
|
|
#
|
|
# ata0 and ata1 are enabled by default with the values shown below
|
|
#
|
|
# Examples:
|
|
# ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
|
|
# ata1: enabled=1, ioaddr1=0x170, ioaddr2=0x370, irq=15
|
|
# ata2: enabled=1, ioaddr1=0x1e8, ioaddr2=0x3e0, irq=11
|
|
# ata3: enabled=1, ioaddr1=0x168, ioaddr2=0x360, irq=9
|
|
#=======================================================================
|
|
ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
|
|
ata1: enabled=1, ioaddr1=0x170, ioaddr2=0x370, irq=15
|
|
ata2: enabled=0, ioaddr1=0x1e8, ioaddr2=0x3e0, irq=11
|
|
ata3: enabled=0, ioaddr1=0x168, ioaddr2=0x360, irq=9
|
|
|
|
#=======================================================================
|
|
# ATA[0-3]-MASTER, ATA[0-3]-SLAVE
|
|
#
|
|
# This defines the type and characteristics of all attached ata devices:
|
|
# type= type of attached device [disk|cdrom]
|
|
# mode= only valid for disks [flat|concat|external|dll|sparse|vmware3]
|
|
# mode= only valid for disks [undoable|growing|volatile]
|
|
# path= path of the image
|
|
# cylinders= only valid for disks
|
|
# heads= only valid for disks
|
|
# spt= only valid for disks
|
|
# status= only valid for cdroms [inserted|ejected]
|
|
# biosdetect= type of biosdetection [none|auto], only for disks on ata0 [cmos]
|
|
# translation=type of translation of the bios, only for disks [none|lba|large|rechs|auto]
|
|
# model= string returned by identify device command
|
|
# journal= optional filename of the redolog for undoable and volatile disks
|
|
#
|
|
# Point this at a hard disk image file, cdrom iso file, or physical cdrom
|
|
# device. To create a hard disk image, try running bximage. It will help you
|
|
# choose the size and then suggest a line that works with it.
|
|
#
|
|
# In UNIX it may be possible to use a raw device as a Bochs hard disk,
|
|
# but WE DON'T RECOMMEND IT. In Windows there is no easy way.
|
|
#
|
|
# In windows, the drive letter + colon notation should be used for cdroms.
|
|
# Depending on versions of windows and drivers, you may only be able to
|
|
# access the "first" cdrom in the system. On MacOSX, use path="drive"
|
|
# to access the physical drive.
|
|
#
|
|
# The path is always mandatory. For flat hard disk images created with
|
|
# bximage geometry autodetection can be used (cylinders=0 -> cylinders are
|
|
# calculated using heads=16 and spt=63). For other hard disk images and modes
|
|
# the cylinders, heads, and spt are mandatory.
|
|
#
|
|
# Default values are:
|
|
# mode=flat, biosdetect=auto, translation=auto, model="Generic 1234"
|
|
#
|
|
# The biosdetect option has currently no effect on the bios
|
|
#
|
|
# Examples:
|
|
# ata0-master: type=disk, mode=flat, path=10M.sample, cylinders=306, heads=4, spt=17
|
|
# ata0-slave: type=disk, mode=flat, path=20M.sample, cylinders=615, heads=4, spt=17
|
|
# ata1-master: type=disk, mode=flat, path=30M.sample, cylinders=615, heads=6, spt=17
|
|
# ata1-slave: type=disk, mode=flat, path=46M.sample, cylinders=940, heads=6, spt=17
|
|
# ata2-master: type=disk, mode=flat, path=62M.sample, cylinders=940, heads=8, spt=17
|
|
# ata2-slave: type=disk, mode=flat, path=112M.sample, cylinders=900, heads=15, spt=17
|
|
# ata3-master: type=disk, mode=flat, path=483M.sample, cylinders=1024, heads=15, spt=63
|
|
# ata3-slave: type=cdrom, path=iso.sample, status=inserted
|
|
#=======================================================================
|
|
ata0-master: type=disk, mode=flat, path="xv6.img", cylinders=100, heads=10, spt=10
|
|
ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1
|
|
#ata0-slave: type=cdrom, path=D:, status=inserted
|
|
#ata0-slave: type=cdrom, path=/dev/cdrom, status=inserted
|
|
#ata0-slave: type=cdrom, path="drive", status=inserted
|
|
#ata0-slave: type=cdrom, path=/dev/rcd0d, status=inserted
|
|
|
|
#=======================================================================
|
|
# BOOT:
|
|
# This defines the boot sequence. Now you can specify up to 3 boot drives.
|
|
# You can either boot from 'floppy', 'disk' or 'cdrom'
|
|
# legacy 'a' and 'c' are also supported
|
|
# Examples:
|
|
# boot: floppy
|
|
# boot: disk
|
|
# boot: cdrom
|
|
# boot: c
|
|
# boot: a
|
|
# boot: cdrom, floppy, disk
|
|
#=======================================================================
|
|
#boot: floppy
|
|
boot: disk
|
|
|
|
#=======================================================================
|
|
# CLOCK:
|
|
# This defines the parameters of the clock inside Bochs:
|
|
#
|
|
# SYNC:
|
|
# TO BE COMPLETED (see Greg explanation in feature request #536329)
|
|
#
|
|
# TIME0:
|
|
# Specifies the start (boot) time of the virtual machine. Use a time
|
|
# value as returned by the time(2) system call. If no time0 value is
|
|
# set or if time0 equal to 1 (special case) or if time0 equal 'local',
|
|
# the simulation will be started at the current local host time.
|
|
# If time0 equal to 2 (special case) or if time0 equal 'utc',
|
|
# the simulation will be started at the current utc time.
|
|
#
|
|
# Syntax:
|
|
# clock: sync=[none|slowdown|realtime|both], time0=[timeValue|local|utc]
|
|
#
|
|
# Example:
|
|
# clock: sync=none, time0=local # Now (localtime)
|
|
# clock: sync=slowdown, time0=315529200 # Tue Jan 1 00:00:00 1980
|
|
# clock: sync=none, time0=631148400 # Mon Jan 1 00:00:00 1990
|
|
# clock: sync=realtime, time0=938581955 # Wed Sep 29 07:12:35 1999
|
|
# clock: sync=realtime, time0=946681200 # Sat Jan 1 00:00:00 2000
|
|
# clock: sync=none, time0=1 # Now (localtime)
|
|
# clock: sync=none, time0=utc # Now (utc/gmt)
|
|
#
|
|
# Default value are sync=none, time0=local
|
|
#=======================================================================
|
|
#clock: sync=none, time0=local
|
|
|
|
|
|
#=======================================================================
|
|
# FLOPPY_BOOTSIG_CHECK: disabled=[0|1]
|
|
# Enables or disables the 0xaa55 signature check on boot floppies
|
|
# Defaults to disabled=0
|
|
# Examples:
|
|
# floppy_bootsig_check: disabled=0
|
|
# floppy_bootsig_check: disabled=1
|
|
#=======================================================================
|
|
#floppy_bootsig_check: disabled=1
|
|
floppy_bootsig_check: disabled=0
|
|
|
|
#=======================================================================
|
|
# LOG:
|
|
# Give the path of the log file you'd like Bochs debug and misc. verbiage
|
|
# to be written to. If you don't use this option or set the filename to
|
|
# '-' the output is written to the console. If you really don't want it,
|
|
# make it "/dev/null" (Unix) or "nul" (win32). :^(
|
|
#
|
|
# Examples:
|
|
# log: ./bochs.out
|
|
# log: /dev/tty
|
|
#=======================================================================
|
|
#log: /dev/null
|
|
log: bochsout.txt
|
|
|
|
#=======================================================================
|
|
# LOGPREFIX:
|
|
# This handles the format of the string prepended to each log line.
|
|
# You may use those special tokens :
|
|
# %t : 11 decimal digits timer tick
|
|
# %i : 8 hexadecimal digits of cpu current eip (ignored in SMP configuration)
|
|
# %e : 1 character event type ('i'nfo, 'd'ebug, 'p'anic, 'e'rror)
|
|
# %d : 5 characters string of the device, between brackets
|
|
#
|
|
# Default : %t%e%d
|
|
# Examples:
|
|
# logprefix: %t-%e-@%i-%d
|
|
# logprefix: %i%e%d
|
|
#=======================================================================
|
|
#logprefix: %t%e%d
|
|
|
|
#=======================================================================
|
|
# LOG CONTROLS
|
|
#
|
|
# Bochs now has four severity levels for event logging.
|
|
# panic: cannot proceed. If you choose to continue after a panic,
|
|
# don't be surprised if you get strange behavior or crashes.
|
|
# error: something went wrong, but it is probably safe to continue the
|
|
# simulation.
|
|
# info: interesting or useful messages.
|
|
# debug: messages useful only when debugging the code. This may
|
|
# spit out thousands per second.
|
|
#
|
|
# For events of each level, you can choose to crash, report, or ignore.
|
|
# TODO: allow choice based on the facility: e.g. crash on panics from
|
|
# everything except the cdrom, and only report those.
|
|
#
|
|
# If you are experiencing many panics, it can be helpful to change
|
|
# the panic action to report instead of fatal. However, be aware
|
|
# that anything executed after a panic is uncharted territory and can
|
|
# cause bochs to become unstable. The panic is a "graceful exit," so
|
|
# if you disable it you may get a spectacular disaster instead.
|
|
#=======================================================================
|
|
panic: action=ask
|
|
error: action=report
|
|
info: action=report
|
|
debug: action=ignore
|
|
#pass: action=fatal
|
|
|
|
#=======================================================================
|
|
# DEBUGGER_LOG:
|
|
# Give the path of the log file you'd like Bochs to log debugger output.
|
|
# If you really don't want it, make it /dev/null or '-'. :^(
|
|
#
|
|
# Examples:
|
|
# debugger_log: ./debugger.out
|
|
#=======================================================================
|
|
#debugger_log: /dev/null
|
|
#debugger_log: debugger.out
|
|
debugger_log: -
|
|
|
|
#=======================================================================
|
|
# COM1, COM2, COM3, COM4:
|
|
# This defines a serial port (UART type 16550A). In the 'term' you can specify
|
|
# a device to use as com1. This can be a real serial line, or a pty. To use
|
|
# a pty (under X/Unix), create two windows (xterms, usually). One of them will
|
|
# run bochs, and the other will act as com1. Find out the tty the com1
|
|
# window using the `tty' command, and use that as the `dev' parameter.
|
|
# Then do `sleep 1000000' in the com1 window to keep the shell from
|
|
# messing with things, and run bochs in the other window. Serial I/O to
|
|
# com1 (port 0x3f8) will all go to the other window.
|
|
# Other serial modes are 'null' (no input/output), 'file' (output to a file
|
|
# specified as the 'dev' parameter), 'raw' (use the real serial port - under
|
|
# construction for win32), 'mouse' (standard serial mouse - requires
|
|
# mouse option setting 'type=serial' or 'type=serial_wheel') and 'socket'
|
|
# (connect a networking socket).
|
|
#
|
|
# Examples:
|
|
# com1: enabled=1, mode=null
|
|
# com1: enabled=1, mode=mouse
|
|
# com2: enabled=1, mode=file, dev=serial.out
|
|
# com3: enabled=1, mode=raw, dev=com1
|
|
# com3: enabled=1, mode=socket, dev=localhost:8888
|
|
#=======================================================================
|
|
#com1: enabled=1, mode=term, dev=/dev/ttyp9
|
|
|
|
|
|
#=======================================================================
|
|
# PARPORT1, PARPORT2:
|
|
# This defines a parallel (printer) port. When turned on and an output file is
|
|
# defined the emulated printer port sends characters printed by the guest OS
|
|
# into the output file. On some platforms a device filename can be used to
|
|
# send the data to the real parallel port (e.g. "/dev/lp0" on Linux, "lpt1" on
|
|
# win32 platforms).
|
|
#
|
|
# Examples:
|
|
# parport1: enabled=1, file="parport.out"
|
|
# parport2: enabled=1, file="/dev/lp0"
|
|
# parport1: enabled=0
|
|
#=======================================================================
|
|
parport1: enabled=1, file="/dev/stdout"
|
|
|
|
#=======================================================================
|
|
# SB16:
|
|
# This defines the SB16 sound emulation. It can have several of the
|
|
# following properties.
|
|
# All properties are in the format sb16: property=value
|
|
# midi: The filename is where the midi data is sent. This can be a
|
|
# device or just a file if you want to record the midi data.
|
|
# midimode:
|
|
# 0=no data
|
|
# 1=output to device (system dependent. midi denotes the device driver)
|
|
# 2=SMF file output, including headers
|
|
# 3=output the midi data stream to the file (no midi headers and no
|
|
# delta times, just command and data bytes)
|
|
# wave: This is the device/file where wave output is stored
|
|
# wavemode:
|
|
# 0=no data
|
|
# 1=output to device (system dependent. wave denotes the device driver)
|
|
# 2=VOC file output, incl. headers
|
|
# 3=output the raw wave stream to the file
|
|
# log: The file to write the sb16 emulator messages to.
|
|
# loglevel:
|
|
# 0=no log
|
|
# 1=resource changes, midi program and bank changes
|
|
# 2=severe errors
|
|
# 3=all errors
|
|
# 4=all errors plus all port accesses
|
|
# 5=all errors and port accesses plus a lot of extra info
|
|
# dmatimer:
|
|
# microseconds per second for a DMA cycle. Make it smaller to fix
|
|
# non-continuous sound. 750000 is usually a good value. This needs a
|
|
# reasonably correct setting for the IPS parameter of the CPU option.
|
|
#
|
|
# For an example look at the next line:
|
|
#=======================================================================
|
|
|
|
#sb16: midimode=1, midi=/dev/midi00, wavemode=1, wave=/dev/dsp, loglevel=2, log=sb16.log, dmatimer=600000
|
|
|
|
#=======================================================================
|
|
# VGA_UPDATE_INTERVAL:
|
|
# Video memory is scanned for updates and screen updated every so many
|
|
# virtual seconds. The default is 40000, about 25Hz. Keep in mind that
|
|
# you must tweak the 'cpu: ips=N' directive to be as close to the number
|
|
# of emulated instructions-per-second your workstation can do, for this
|
|
# to be accurate.
|
|
#
|
|
# Examples:
|
|
# vga_update_interval: 250000
|
|
#=======================================================================
|
|
vga_update_interval: 300000
|
|
|
|
# using for Winstone '98 tests
|
|
#vga_update_interval: 100000
|
|
|
|
#=======================================================================
|
|
# KEYBOARD_SERIAL_DELAY:
|
|
# Approximate time in microseconds that it takes one character to
|
|
# be transfered from the keyboard to controller over the serial path.
|
|
# Examples:
|
|
# keyboard_serial_delay: 200
|
|
#=======================================================================
|
|
keyboard_serial_delay: 250
|
|
|
|
#=======================================================================
|
|
# KEYBOARD_PASTE_DELAY:
|
|
# Approximate time in microseconds between attempts to paste
|
|
# characters to the keyboard controller. This leaves time for the
|
|
# guest os to deal with the flow of characters. The ideal setting
|
|
# depends on how your operating system processes characters. The
|
|
# default of 100000 usec (.1 seconds) was chosen because it works
|
|
# consistently in Windows.
|
|
#
|
|
# If your OS is losing characters during a paste, increase the paste
|
|
# delay until it stops losing characters.
|
|
#
|
|
# Examples:
|
|
# keyboard_paste_delay: 100000
|
|
#=======================================================================
|
|
keyboard_paste_delay: 100000
|
|
|
|
#=======================================================================
|
|
# MOUSE:
|
|
# This option prevents Bochs from creating mouse "events" unless a mouse
|
|
# is enabled. The hardware emulation itself is not disabled by this.
|
|
# You can turn the mouse on by setting enabled to 1, or turn it off by
|
|
# setting enabled to 0. Unless you have a particular reason for enabling
|
|
# the mouse by default, it is recommended that you leave it off.
|
|
# You can also toggle the mouse usage at runtime (control key + middle
|
|
# mouse button on X11, SDL, wxWidgets and Win32).
|
|
# With the mouse type option you can select the type of mouse to emulate.
|
|
# The default value is 'ps2'. The other choices are 'imps2' (wheel mouse
|
|
# on PS/2), 'serial', 'serial_wheel' (one com port requires setting
|
|
# 'mode=mouse') and 'usb' (3-button mouse - one of the USB ports must be
|
|
# connected with the 'mouse' device - requires PCI and USB support).
|
|
#
|
|
# Examples:
|
|
# mouse: enabled=1
|
|
# mouse: enabled=1, type=imps2
|
|
# mouse: enabled=1, type=serial
|
|
# mouse: enabled=0
|
|
#=======================================================================
|
|
mouse: enabled=0
|
|
|
|
#=======================================================================
|
|
# private_colormap: Request that the GUI create and use it's own
|
|
# non-shared colormap. This colormap will be used
|
|
# when in the bochs window. If not enabled, a
|
|
# shared colormap scheme may be used. Not implemented
|
|
# on all GUI's.
|
|
#
|
|
# Examples:
|
|
# private_colormap: enabled=1
|
|
# private_colormap: enabled=0
|
|
#=======================================================================
|
|
private_colormap: enabled=0
|
|
|
|
#=======================================================================
|
|
# fullscreen: ONLY IMPLEMENTED ON AMIGA
|
|
# Request that Bochs occupy the entire screen instead of a
|
|
# window.
|
|
#
|
|
# Examples:
|
|
# fullscreen: enabled=0
|
|
# fullscreen: enabled=1
|
|
#=======================================================================
|
|
#fullscreen: enabled=0
|
|
#screenmode: name="sample"
|
|
|
|
#=======================================================================
|
|
# ne2k: NE2000 compatible ethernet adapter
|
|
#
|
|
# Examples:
|
|
# ne2k: ioaddr=IOADDR, irq=IRQ, mac=MACADDR, ethmod=MODULE, ethdev=DEVICE, script=SCRIPT
|
|
#
|
|
# ioaddr, irq: You probably won't need to change ioaddr and irq, unless there
|
|
# are IRQ conflicts.
|
|
#
|
|
# mac: The MAC address MUST NOT match the address of any machine on the net.
|
|
# Also, the first byte must be an even number (bit 0 set means a multicast
|
|
# address), and you cannot use ff:ff:ff:ff:ff:ff because that's the broadcast
|
|
# address. For the ethertap module, you must use fe:fd:00:00:00:01. There may
|
|
# be other restrictions too. To be safe, just use the b0:c4... address.
|
|
#
|
|
# ethdev: The ethdev value is the name of the network interface on your host
|
|
# platform. On UNIX machines, you can get the name by running ifconfig. On
|
|
# Windows machines, you must run niclist to get the name of the ethdev.
|
|
# Niclist source code is in misc/niclist.c and it is included in Windows
|
|
# binary releases.
|
|
#
|
|
# script: The script value is optional, and is the name of a script that
|
|
# is executed after bochs initialize the network interface. You can use
|
|
# this script to configure this network interface, or enable masquerading.
|
|
# This is mainly useful for the tun/tap devices that only exist during
|
|
# Bochs execution. The network interface name is supplied to the script
|
|
# as first parameter
|
|
#
|
|
# If you don't want to make connections to any physical networks,
|
|
# you can use the following 'ethmod's to simulate a virtual network.
|
|
# null: All packets are discarded, but logged to a few files.
|
|
# arpback: ARP is simulated. Disabled by default.
|
|
# vde: Virtual Distributed Ethernet
|
|
# vnet: ARP, ICMP-echo(ping), DHCP and read/write TFTP are simulated.
|
|
# The virtual host uses 192.168.10.1.
|
|
# DHCP assigns 192.168.10.2 to the guest.
|
|
# TFTP uses the ethdev value for the root directory and doesn't
|
|
# overwrite files.
|
|
#
|
|
#=======================================================================
|
|
# ne2k: ioaddr=0x240, irq=9, mac=fe:fd:00:00:00:01, ethmod=fbsd, ethdev=en0 #macosx
|
|
# ne2k: ioaddr=0x240, irq=9, mac=b0:c4:20:00:00:00, ethmod=fbsd, ethdev=xl0
|
|
# ne2k: ioaddr=0x240, irq=9, mac=b0:c4:20:00:00:00, ethmod=linux, ethdev=eth0
|
|
# ne2k: ioaddr=0x240, irq=9, mac=b0:c4:20:00:00:01, ethmod=win32, ethdev=MYCARD
|
|
# ne2k: ioaddr=0x240, irq=9, mac=fe:fd:00:00:00:01, ethmod=tap, ethdev=tap0
|
|
# ne2k: ioaddr=0x240, irq=9, mac=fe:fd:00:00:00:01, ethmod=tuntap, ethdev=/dev/net/tun0, script=./tunconfig
|
|
# ne2k: ioaddr=0x240, irq=9, mac=b0:c4:20:00:00:01, ethmod=null, ethdev=eth0
|
|
# ne2k: ioaddr=0x240, irq=9, mac=b0:c4:20:00:00:01, ethmod=vde, ethdev="/tmp/vde.ctl"
|
|
# ne2k: ioaddr=0x240, irq=9, mac=b0:c4:20:00:00:01, ethmod=vnet, ethdev="c:/temp"
|
|
|
|
#=======================================================================
|
|
# KEYBOARD_MAPPING:
|
|
# This enables a remap of a physical localized keyboard to a
|
|
# virtualized us keyboard, as the PC architecture expects.
|
|
# If enabled, the keymap file must be specified.
|
|
#
|
|
# Examples:
|
|
# keyboard_mapping: enabled=1, map=gui/keymaps/x11-pc-de.map
|
|
#=======================================================================
|
|
keyboard_mapping: enabled=0, map=
|
|
|
|
#=======================================================================
|
|
# KEYBOARD_TYPE:
|
|
# Type of keyboard return by a "identify keyboard" command to the
|
|
# keyboard controler. It must be one of "xt", "at" or "mf".
|
|
# Defaults to "mf". It should be ok for almost everybody. A known
|
|
# exception is french macs, that do have a "at"-like keyboard.
|
|
#
|
|
# Examples:
|
|
# keyboard_type: mf
|
|
#=======================================================================
|
|
#keyboard_type: mf
|
|
|
|
#=======================================================================
|
|
# USER_SHORTCUT:
|
|
# This defines the keyboard shortcut to be sent when you press the "user"
|
|
# button in the headerbar. The shortcut string is a combination of maximum
|
|
# 3 key names (listed below) separated with a '-' character. The old-style
|
|
# syntax (without the '-') still works for the key combinations supported
|
|
# in Bochs 2.2.1.
|
|
# Valid key names:
|
|
# "alt", "bksl", "bksp", "ctrl", "del", "down", "end", "enter", "esc",
|
|
# "f1", ... "f12", "home", "ins", "left", "menu", "minus", "pgdwn", "pgup",
|
|
# "plus", "right", "shift", "space", "tab", "up", and "win".
|
|
#
|
|
# Example:
|
|
# user_shortcut: keys=ctrl-alt-del
|
|
#=======================================================================
|
|
#user_shortcut: keys=ctrl-alt-del
|
|
|
|
#=======================================================================
|
|
# I440FXSUPPORT:
|
|
# This option controls the presence of the i440FX PCI chipset. You can
|
|
# also specify the devices connected to PCI slots. Up to 5 slots are
|
|
# available now. These devices are currently supported: ne2k, pcivga,
|
|
# pcidev and pcipnic. If Bochs is compiled with Cirrus SVGA support
|
|
# you'll have the additional choice 'cirrus'.
|
|
#
|
|
# Example:
|
|
# i440fxsupport: enabled=1, slot1=pcivga, slot2=ne2k
|
|
#=======================================================================
|
|
#i440fxsupport: enabled=1
|
|
|
|
#=======================================================================
|
|
# USB1:
|
|
# This option controls the presence of the USB root hub which is a part
|
|
# of the i440FX PCI chipset. With the portX option you can connect devices
|
|
# to the hub (currently supported: 'mouse' and 'keypad'). If you connect
|
|
# the mouse to one of the ports and use the mouse option 'type=usb' you'll
|
|
# have a 3-button USB mouse.
|
|
#
|
|
# Example:
|
|
# usb1: enabled=1, port1=mouse, port2=keypad
|
|
#=======================================================================
|
|
#usb1: enabled=1
|
|
|
|
#=======================================================================
|
|
# CMOSIMAGE:
|
|
# This defines image file that can be loaded into the CMOS RAM at startup.
|
|
# The rtc_init parameter controls whether initialize the RTC with values stored
|
|
# in the image. By default the time0 argument given to the clock option is used.
|
|
# With 'rtc_init=image' the image is the source for the initial time.
|
|
#
|
|
# Example:
|
|
# cmosimage: file=cmos.img, rtc_init=image
|
|
#=======================================================================
|
|
#cmosimage: file=cmos.img, rtc_init=time0
|
|
|
|
#=======================================================================
|
|
# other stuff
|
|
#=======================================================================
|
|
#magic_break: enabled=1
|
|
#load32bitOSImage: os=nullkernel, path=../kernel.img, iolog=../vga_io.log
|
|
#load32bitOSImage: os=linux, path=../linux.img, iolog=../vga_io.log, initrd=../initrd.img
|
|
#text_snapshot_check: enable
|
|
|
|
#-------------------------
|
|
# PCI host device mapping
|
|
#-------------------------
|
|
#pcidev: vendor=0x1234, device=0x5678
|
|
|
|
#=======================================================================
|
|
# GDBSTUB:
|
|
# Enable GDB stub. See user documentation for details.
|
|
# Default value is enabled=0.
|
|
#=======================================================================
|
|
#gdbstub: enabled=0, port=1234, text_base=0, data_base=0, bss_base=0
|
|
|
|
#=======================================================================
|
|
# IPS:
|
|
# The IPS directive is DEPRECATED. Use the parameter IPS of the CPU
|
|
# directive instead.
|
|
#=======================================================================
|
|
#ips: 10000000
|
|
|
|
#=======================================================================
|
|
# for Macintosh, use the style of pathnames in the following
|
|
# examples.
|
|
#
|
|
# vgaromimage: :bios:VGABIOS-elpin-2.40
|
|
# romimage: file=:bios:BIOS-bochs-latest, address=0xf0000
|
|
# floppya: 1_44=[fd:], status=inserted
|
|
#=======================================================================
|