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The RTEMS i386 stub in
c/src/lib/libbsp/i386/shared/comm/i386-stub.c
doesn't take advantage of some of the newer gdb remote features which
permits shorter and fewer packets.
Here is a patch which uses the 'T' response to report the registers
which gdb generally needs, and implements the 'P' request to set only
a single register. The general effect is to avoid sending all the
register contents back and forth between gdb and the stub every time
the stub stops. This also implements the 'D' request which handles
the gdb detach command, so you can cleanly quit out of the debugger
and leave the target board running.
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moves pieces of the pc386 bsp up to a shared level for all i386 BSPs
and modifies the i386ex BSP to use those shared pieces. Serial remote
debugging is included for both targets. Erik's notes:
There are several workarounds in it:
1) #define NEXT_GAS is hardcoded in pc386/start/start.s
2) #define NEXT_GAS is hardcoded in i386ex/start/start.s
3) #define NEW_GAS is hardcoded in pc386/start16.s
4) #undef __assert and redeclare _assert hardcoded in console.c for
both pc386 and i386ex due to my egcs1.1b ~ newlib problem. Should have
modified t-rtems.cfg ( no time )
I've tested pc386 with both video and serial consoles and GDB remote.
All work fine, except that GDB acts weird. ( re: other posting)
I hope this will work for you. It took quite some time to locate the
autoconf error. The remainder was just grunt work.
Unfortunately, I think I've unwound the removal of the IBMPCInitVideo
stuff. Sorry. I REALLY can't spend more time... I've been at this
conversion to 4.0 locally and updating the release since Sept. 8th, and
have yet to compile my network driver.... This is as much as I can do
right now.
I look forward to the next patch to really test i368ex. I did make sure
that the sample tests worked for pc386.
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1. Finally fixes raw interrupts for pc386
2. Makes some minor cleanup in console and startup
3. Makes rtems_termios_dequeue_characters() to return count of
outstanding chars - it allows to simplify console isrs a little
bit.
4. pc386 uart modified to be friendlier to termios parameter changes,
to have minor performance improvement and to take advantage of
of above termios modification.
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patches missing from 980911.
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Here are patches that bring 980911 back to what I think is a correct
version of raw IDT management as well as a correct initialisation
of video console and rtems managed interrupts.
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Here is a brief description of the attached patch :
1) There was a bug in the code for the COM2 serial line driver. Aleksey
gave me a fix that fixes the driver code itself. I would like to thank
him again publicly,
2) I introduced constants in the serial driver code because I had a hard
time reading the meanning of hexadecimal values in the NS data book :)
3)You can now mix printk and printf on serial line (tested on COM2).
There is a #ifdef PRINTK_ON_SERIAL in console.c that enables to have
printk on console while printf on serial line,
4) Removed call to displayCpuInfo because anyway if was at the wrong
place for serial line console (too early). It can anyway be called at
application level,
5) The original printk was unable to display negative integer values
and was also recursive. It now works corectly,
All the modifications have been tested here on the COM2 port from
a PC running RTEMS to a PC running linux,
NB : there is still a bug on PC386 serial line : exit does not flush the
remaining output queue. As this is not a bug in the driver itself but
somewhere in PC386 initialization/termios relationship it will be part
of another patch.
NB2 : As Emmanuel excerced the exception hanlder code, while porting the
SMC driver to the new BSD stack, we found a bug in the exception
handler : it shall not delete the current thread in case we are running
at interrupt level. This will be part of another patch...
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Here is a patch that enables to catch exception
and get message before crashing RTEMS :)
It should be generic to any Intel port although enabled
only for pc386 BSP...
[Joel] I fixed the bug I introduced in irq_asm.s...
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- Use the "hlt" instruction for the Idle thread,
- Optimise interrupt PATH leadding to thread wakeup,
- Preparation for Intel exception management that should
come before the end of the week...
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It fixes netboot build problem, KA9Q configuration
for pc386, some compiler wardning, it also removed some stuff
ifdef'ed with '#if 0'.
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inline with the new IRQ structure.
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<raguet@crf.canon.fr> to make their patches work together.
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Here is a enhanced version of my previous patch. This patch enables
to potentially share the new interrupt management code for all Intel targets
(pc386, go32 and force386) bsp.
Note : this patch is complete only for pc386. It still needs to
be completed for go32 and force386. I carrefully checked
that anything needed is in for force386 (only some function
name changes for IDT manipulation and GDT segment
manipulation). But anyway I will not be able to test any
of theses targets...
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