- rework the order of initialization with and without the control panel.
The thing that was bothering me most was the command line options were
being processed after the user had set everything in the control panel.
This is clearly not what's expected--the command line options should
affect the startup defaults of the control panel, but whatever the user
chooses in the cpanel menus is the final choice.
- if the control panel (config interface) is not wanted, the user can
put "-nocp" or "-nocontrolpanel" as the FIRST argument on the command
line. Also, the "-psn" option which is automatically passed in by
MacOS X when you doubleclick the application causes the control panel
to be disabled. In this case, the order of operations is:
1. read bochsrc
2. parse command line options.
- if the control panel is enabled (default), the command line options are
parsed to provide the startup defaults for the control panel, but the
control panel settings are the final answer. So the order is:
1. parse command line options
2. run control panel (if user chooses, he can read bochsrc from menus)
- I haven't tested command line options with the debugger yet.
media status to 0 then 1 (equivalent to removing then inserting a disk).
Then it calls the UI function bx_gui.update_floppy_status_buttons()
if the interface has been initialized already.
cylinders, heads, and spt of each hard disk to be 1 instead of 0. This
caused the BIOS to report the existence of the hard disks, even when
they were never configured. The most obvious symptom of this problem
was "read multiple issued to non-disk" when a cdrom was enabled, which
happened because the BIOS tried to send hard disk commands to the CDROM.
which notifies them that the mouse_enabled bit has changed. Now that
mouse_enabled can be initialized or modified by parameter events in
addition to GUI events, the guis must be prepared for it. I have pasted
empty method definitions into mouse_enabled_changed_specific for all
guis except for X11, which I did the right way. The implementation
of this function must use the argument "val" rather than reading the
parameter.
control panel are all implemented as bx_list_c, and look much like
they did before.
- removed many hardcoded UI functions from control.cc, since the
much more general "text_ask" methods have replaced them.
- add range checking on integer parameter values. This exposed several
cases where my initial value for an integer parameter was not in range.
- cleaned up behavior of get/set methods. The get/set methods allow the
handler to override the value that is returned/set, or perform side
effects.
- the title parameter of a bx_list_c now defaults to the name.
- now bx_param_c fields that used to be private are protected instead
- removed references to bx_any
- moved definition of set_handler from siminterface.h to siminterface.cc.
I was considering with doing a "set" of the old value when the
handler is first installed, but that remains commented out.
- BX_BOOT_DISKA and BX_BOOT_DISKC are now 0,1 so that they can correspond
with the values of a bx_param_enum_c. For a while they were 0x00 and 0x80
corresponding to the numbering convention of the bios, but it didn't
really matter.
been converted into parameters temporarily have the letter "O" appended
to their name. I don't want to keep it this way, but it has helped
in the conversion process because the compiler refuses to compile the
old uses of the name. Before I started using the "O" trick, there were
many bugs like this: if (bx_options.diskc.present) {...}
This was legal with the new parameters, but it was testing whether the
parameter structure had been created, instead of testing the value of
the present parameter. Renaming present to Opresent turns this into
a compile error, which points out the incorrect use of the param.
- the "--disable-control-panel" no longer works, I'm afraid. I can no
longer support this and continue progress.
data structures, see bx_init_options in main.cc. The implementation
of this menu and all its choices is 17 lines long, see do_mem_options_menu
in gui/control.cc.
now the whole "Bochs Memory Options" menu uses new style parameters.
The next step is to remove the hardcoded stuff that generates and runs
this menu, and replace it with general menu building code. All you should
need to create this menu is the string "Bochs Memory Options", and the
IDs of the bx_param_c options that should appear on the menu. The
bx_param_c structure for each parameter tell what type it is, how to
display it, constraints on the value, what to do when the parameter
changes.
declared as bx_param_c * types in the bx_options structure. They are
initialized in main.cc (bx_init_options) with default values.
Access to parameters of this type should always be like this:
bx_options.mouse_enabled->get ();
bx_options.mouse_enabled->set (newval);
Eventually I will be transferring all options to this format.
when main.cc no longer had one. Now compiling with debugger is working
with the control panel. To get the control panel, you have to click
the snapshot button, and to get the debugger, you have to press ^C.
These should be better integrated (maybe a control panel menu choice
that jumps into the debugger and a debugger command that starts the
runtime control panel...)
BX_SUPPORT_APIC were used. To follow the pattern used by other
names like this, I changed them all to BX_SUPPORT_APIC.
Thanks to Tom Lindström for chasing this down!
panel. It gives the user the option of continue this time, continue
and never ask again for this type of log message, or die.
- the communication between control.cc and siminterface.cc is still
somewhat crude. I'm trying to implement it so that a network
protocol based on this interface will be simple. I'll get this cleaned
up soon.
writes a bochsrc for you.
- since there were two options related to logging, I moved them both
into a new struct called bx_log_options. This follows the pattern
used by other devices.
- in control.cc: removed option 1 from main menu, the one that said
"Read options from bochsrc.txt." This was identical to choosing
the next option, "Read options from..." and only saved you one
keystroke, so I removed it.
BX_CPU_C bx_cpu;
BX_MEM_C bx_mem;
and when more than one processor, use
BX_CPU_C *bx_cpu_array[BX_SMP_PROCESSORS];
BX_MEM_C *bx_mem_array[BX_ADDRESS_SPACES];
The changeover is controlled by BX_SMP_PROCESSORS, but there are only
a few code changes since nearly all code uses the BX_CPU(n) and BX_MEM(n)
macros.
- This turns out to make a 10% speed difference! With this revision,
the CVS version now gets 95% of the performance of the 3/25/2000
snapshot, which I've been using as my baseline.
is the first attempt to regain the performance of pre-SMP bochs
(1.1.2). When simulating only one processor, stay in cpu_loop forever
as pre-SMP versions did. The overhead of returning from cpu_loop over
and over was slowing us down.
in BRANCH-smp-bochs revisions.
- The general task was to make multiple CPU's which communicate
through their APICs. So instead of BX_CPU and BX_MEM, we now have
BX_CPU(x) and BX_MEM(y). For an SMP simulation you have several
processors in a shared memory space, so there might be processors
BX_CPU(0..3) but only one memory space BX_MEM(0). For cosimulation,
you could have BX_CPU(0) with BX_MEM(0), then BX_CPU(1) with
BX_MEM(1). WARNING: Cosimulation is almost certainly broken by the
SMP changes.
- to simulate multiple CPUs, you have to give each CPU time to execute
in turn. This is currently implemented using debugger guards. The
cpu loop steps one CPU for a few instructions, then steps the
next CPU for a few instructions, etc.
- there is some limited support in the debugger for two CPUs, for
example printing information from each CPU when single stepping.
