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Message
From: Jeremy Bennett<jeremy.bennett@e...>
Date: Thu Aug 14 19:14:49 CEST 2008
Subject: [openrisc] linux-2.6.22
On Mon, 2008-08-11 at 01:06 +0200, rich_daddio@y... wrote:
> Hi All,
> Patch linux_2.6.22_or32_unified_simtested.bz2 for or32 & linux-2.6.22
> is available:
> This patch CONTAINS a usable ramdisk and .config file included. sim
> tested only as usual with the gcc-4.2.2, binutils.2.18.50,
> uClibc-0.9.29 toolchain available using the build script at:
> http://www.opencores.com/projects.cgi/web/or1k/gnu_toolchain_port
>
> It contains changes, fixes, and ideas by:
> Rich D'Addio (noted by RGD in the code USUALLY)
>
> Note: This release required tweaks to the architecture specific kernel
> module due to some changes in the kernel task structure and the way
> thread_info is used.
>
> There are a lot of commented-out turds hanging around in this patch, I
> am hoping to scrub most of this in the 2.6.23 patch, 2.6.22 will
> contain the commented stuff --return to 2.6.22 if you think I have
> broken anything badly...
Hi Rich,
Great work. This built and ran out of the box on Fedora 9 using GCC
4.3.0. I was using the Or1ksim 0.2.0 patched for GDB 6.8.
I did get some odd messages and echoing using the telnet UART interface:
starting pid 17, tty '': '/bin/sh'
BusyBox v1.7.5 (2008-04-26 13:18:58 EDT) built-in shell (ash)
Enter 'help' for a list of built-in commands.
/bin/sh: can't access tty; job control turned off
# #
# # stty -echo
stty -echo
# # ls
bin etc linuxrc root tmp var
dev home proc sbin usr
# #
I'm not sure what the message about job control means, nor why I get a
double prompt. The double prompt seems to be a telnet thing - I don't
get it with an xterm console.
It also booted remotely on Or1ksim under control of GDB 6.8. Execution
is MUCH slower, I think because the simulator is polling the TCP/IP
connection on each cycle to see if a debug command has arrived. That
needs to be event driven, but I can add that when I move things to the
GDB Remote Serial Protocol.
Minor pickiness 1. The start address in the executable is the start of
the ROM image (0xc0000000), not the OpenRISC 1000 reset vector (0x100).
This means you cannot just load the image in GDB and run, you must first
set the program counter using set $pc=0x100. It would be nice if there
was a way to make the start address 0x100.
Minor pickiness 2. The telnet port chosen in 10084, which is in the
registered port range. Although that port has not yet been registered,
it might be an idea to set the default in the private range
(49152-65535). The same applies even more to the commented out debug
server_port - it uses 9999, which IS registered.
You might like to consider editing out some of the fields in the sim.cfg
file, which drive features not in Or1ksim 0.2.0. Here are the messages.
Mostly due to the bus parameter for each component, which wasn't there
in 0.2.0, but a couple due to the tick timer and PIC, which also had not
been implemented.
WARNING: config.memory: Invalid parameter: bus; ignoring.
WARNING: config.memory: Invalid parameter: bus; ignoring.
WARNING: config.memory: Invalid parameter: bus; ignoring.
WARNING: config.immu: Invalid parameter: bus; ignoring.
WARNING: config.dmmu: Invalid parameter: bus; ignoring.
WARNING: config.ic: Invalid parameter: bus; ignoring.
WARNING: config.dc: Invalid parameter: bus; ignoring.
WARNING: config.cpu: Invalid parameter: bus; ignoring.
WARNING: config.cpu: Invalid parameter: dbus; ignoring.
WARNING: config.pm: Invalid parameter: bus; ignoring.
WARNING: config.debug: Invalid parameter: bus; ignoring.
WARNING: config.mc: Invalid parameter: bus; ignoring.
WARNING: config.uart: Invalid parameter: bus; ignoring.
WARNING: config.dma: Invalid parameter: bus; ignoring.
WARNING: config.ethernet: Invalid parameter: bus; ignoring.
WARNING: config.gpio: Invalid parameter: bus; ignoring.
WARNING: config.vga: Invalid parameter: bus; ignoring.
WARNING: config: Unknown section: tick; ignoring.
WARNING: config: Unknown section: pic; ignoring.
WARNING: config.fb: Invalid parameter: bus; ignoring.
WARNING: config.kbd: Invalid parameter: bus; ignoring.
WARNING: config.ata: Invalid parameter: bus; ignoring.
ATB,
Jeremy
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