2. Fixed bug
[ 989478 ] I-Cache and undefined Instruktions
The L4 microkernel uses an undefined instruction to
trap for a special requests into the kernel (LOCK NOP).
The handler fixes this up and gives the user a special
code page with syscall stubs. If you're not using the
I-Cache optimization everthing works find on bochs. But
if you enable the I-Cache (--enable-icache), then the
undefined opcode exception is thrown only once for ever
virtual address it occurs. See the demodisk of the
L4KA::pistachio
(http://www.l4ka.org/projects/pistachio/download.php).
In this case the pingpong benchmark of this demo is of
interest. Everything runs fine until the program tries
to spawn a new task for its measurements. This new task
shares the code of the creating program. But the new
task stops executing at the undefined instruction
explained above and no exception is thrown.
data written to the port and where to get the data read from it. Available
modes are 'null' (no input/output), 'file' (output to a file specified as
the 'dev' parameter), 'term' (serial terminal) and 'raw' (use the real serial
port - under construction for win32).
- descriptions for serial and parallel options in bochsrc sample updated
memory handling in memory.cc removed)
- CRTC write protection implemented
- 16-bit read access to some VGA registers added
- memory handler code now conciders the status of the A20 line
* up to 5 slots can be specified with the 'i440fxsupport' config option
* the pci slot number are hardwired to pci device numbers
* the 'devfunc' value is returned the calling device (useful for multi-function
devices)
* the core of the i440FX chipset is hardwired to pci device 1 + 2; usb is still
optional and appears at device 1, function 2
- ne2k: enable pci features if connected to a pci slot
- ne2k: asic data port supports 32-bit access if ne2k-pci is active
- pci2isa: improved error messages for ELCR1 and ELCR2
* PCI initialization and configuration space handling added
* ASIC data port now supports 32-bit r/w if PCI is present
* PCI device will be enabled if the requested base address is >= 0x1000
- ne2k: 8390 command register is now present on all pages
- ne2k: some panics changed to errors, debug messages improved
- PCI host bridge is now a core plugin (if enabled) and initialized earlier
